Add strong typed bool type Visible.

88 files changed, 318 insertions, 264 deletions

diff --git a/src/gui/buttoninfo.h b/src/gui/buttoninfo.h
index 7de7375f9..a6c7eb9e0 100644
--- a/src/gui/buttoninfo.h
+++ b/src/gui/buttoninfo.h
@@ -21,13 +21,15 @@
 #ifndef GUI_BUTTONINFO_H
 #define GUI_BUTTONINFO_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "localconsts.h"
 
 class Button;
 
 struct ButtonInfo final
 {
-    ButtonInfo(Button *const button0, const int key0, const bool visible0) :
+    ButtonInfo(Button *const button0, const int key0, const Visible visible0) :
         button(button0),
         key(key0),
         visible(visible0)
@@ -38,6 +40,6 @@ struct ButtonInfo final
 
     Button *button;
     int key;
-    bool visible;
+    Visible visible;
 };
 #endif  // GUI_BUTTONINFO_H
diff --git a/src/gui/models/skillmodel.cpp b/src/gui/models/skillmodel.cpp
index 8bb1bdbf8..ea6781c8d 100644
--- a/src/gui/models/skillmodel.cpp
+++ b/src/gui/models/skillmodel.cpp
@@ -54,7 +54,7 @@ void SkillModel::updateVisibilities()
 
     FOR_EACH (SkillList::const_iterator, it, mSkills)
     {
-        if ((*it) && (*it)->visible)
+        if ((*it) && (*it)->visible == Visible_true)
             mVisibleSkills.push_back((*it));
     }
 }
diff --git a/src/gui/popupmanager.cpp b/src/gui/popupmanager.cpp
index d2b1328b9..3749a6502 100644
--- a/src/gui/popupmanager.cpp
+++ b/src/gui/popupmanager.cpp
@@ -49,19 +49,19 @@ void PopupManager::closePopupMenu()
 void PopupManager::hideBeingPopup()
 {
     if (beingPopup)
-        beingPopup->setVisible(false);
+        beingPopup->setVisible(Visible_false);
 }
 
 void PopupManager::hideTextPopup()
 {
     if (textPopup)
-        textPopup->setVisible(false);
+        textPopup->setVisible(Visible_false);
 }
 
 void PopupManager::hidePopupMenu()
 {
     if (popupMenu)
-        popupMenu->setVisible(false);
+        popupMenu->setVisible(Visible_false);
 }
 
 bool PopupManager::isPopupMenuVisible()
diff --git a/src/gui/popups/beingpopup.cpp b/src/gui/popups/beingpopup.cpp
index 16a60150a..167767e74 100644
--- a/src/gui/popups/beingpopup.cpp
+++ b/src/gui/popups/beingpopup.cpp
@@ -107,7 +107,7 @@ void BeingPopup::show(const int x, const int y, Being *const b)
 {
     if (!b)
     {
-        setVisible(false);
+        setVisible(Visible_false);
         return;
     }
 
@@ -123,7 +123,7 @@ void BeingPopup::show(const int x, const int y, Being *const b)
 
     if (b->getType() == ActorType::Npc && b->getComment().empty())
     {
-        setVisible(false);
+        setVisible(Visible_false);
         return;
     }
 
diff --git a/src/gui/popups/createpartypopup.h b/src/gui/popups/createpartypopup.h
index b7f596e36..971c9a2cd 100644
--- a/src/gui/popups/createpartypopup.h
+++ b/src/gui/popups/createpartypopup.h
@@ -75,7 +75,7 @@ class CreatePartyPopup final : public Popup,
                 socialWindow->showPartyCreate();
             }
 
-            setVisible(false);
+            setVisible(Visible_false);
         }
 
         void show(Widget *parent)
@@ -87,7 +87,7 @@ class CreatePartyPopup final : public Popup,
             parent->getAbsolutePosition(x, y);
             y += parent->getHeight();
             setPosition(x, y);
-            setVisible(true);
+            setVisible(Visible_true);
             requestMoveToTop();
         }
 
diff --git a/src/gui/popups/itempopup.cpp b/src/gui/popups/itempopup.cpp
index ad0628afa..705c7c50f 100644
--- a/src/gui/popups/itempopup.cpp
+++ b/src/gui/popups/itempopup.cpp
@@ -278,7 +278,7 @@ void ItemPopup::mouseMoved(MouseEvent &event)
     Popup::mouseMoved(event);
 
     // When the mouse moved on top of the popup, hide it
-    setVisible(false);
+    setVisible(Visible_false);
     mLastName.clear();
     mLastColor = 1;
     mLastId = 0;
diff --git a/src/gui/popups/popupmenu.cpp b/src/gui/popups/popupmenu.cpp
index 7bf1aa5a6..dd48da369 100644
--- a/src/gui/popups/popupmenu.cpp
+++ b/src/gui/popups/popupmenu.cpp
@@ -939,7 +939,7 @@ void PopupMenu::showChangePos(const int x, const int y)
         mType = ActorType::Unknown;
         mX = 0;
         mY = 0;
-        setVisible(false);
+        setVisible(Visible_false);
     }
 }
 
@@ -1334,14 +1334,14 @@ void PopupMenu::handleLink(const std::string &link,
         if (being == localPlayer)
         {
             if (equipmentWindow && !equipmentWindow->isWindowVisible())
-                equipmentWindow->setVisible(true);
+                equipmentWindow->setVisible(Visible_true);
         }
         else
         {
             if (beingEquipmentWindow)
             {
                 beingEquipmentWindow->setBeing(being);
-                beingEquipmentWindow->setVisible(true);
+                beingEquipmentWindow->setVisible(Visible_true);
             }
         }
     }
@@ -1503,22 +1503,22 @@ void PopupMenu::handleLink(const std::string &link,
     else if (!link.compare(0, 12, "hide button_"))
     {
         if (windowMenu)
-            windowMenu->showButton(link.substr(12), false);
+            windowMenu->showButton(link.substr(12), Visible_false);
     }
     else if (!link.compare(0, 12, "show button_"))
     {
         if (windowMenu)
-            windowMenu->showButton(link.substr(12), true);
+            windowMenu->showButton(link.substr(12), Visible_true);
     }
     else if (!link.compare(0, 9, "hide bar_"))
     {
         if (miniStatusWindow)
-            miniStatusWindow->showBar(link.substr(9), false);
+            miniStatusWindow->showBar(link.substr(9), Visible_false);
     }
     else if (!link.compare(0, 9, "show bar_"))
     {
         if (miniStatusWindow)
-            miniStatusWindow->showBar(link.substr(9), true);
+            miniStatusWindow->showBar(link.substr(9), Visible_false);
     }
     else if (!link.compare(0, 12, "show window_"))
     {
@@ -1581,7 +1581,7 @@ void PopupMenu::handleLink(const std::string &link,
         logger->log("PopupMenu: Warning, unknown action '%s'", link.c_str());
     }
 
-    setVisible(false);
+    setVisible(Visible_false);
 
     mBeingId = 0;
     mFloorItemId = 0;
@@ -2234,7 +2234,7 @@ void PopupMenu::showPopup(int x, int y)
         y = mainGraphics->mHeight - getHeight();
     mScrollArea->setHeight(height);
     setPosition(x, y);
-    setVisible(true);
+    setVisible(Visible_true);
     requestMoveToTop();
 }
 
diff --git a/src/gui/popups/skillpopup.cpp b/src/gui/popups/skillpopup.cpp
index 8a6f26b26..ecd085a99 100644
--- a/src/gui/popups/skillpopup.cpp
+++ b/src/gui/popups/skillpopup.cpp
@@ -125,6 +125,6 @@ void SkillPopup::mouseMoved(MouseEvent &event)
     Popup::mouseMoved(event);
 
     // When the mouse moved on top of the popup, hide it
-    setVisible(false);
+    setVisible(Visible_false);
     mLastId = 0;
 }
diff --git a/src/gui/popups/spellpopup.cpp b/src/gui/popups/spellpopup.cpp
index 8e901cfb9..be741bb32 100644
--- a/src/gui/popups/spellpopup.cpp
+++ b/src/gui/popups/spellpopup.cpp
@@ -110,7 +110,7 @@ void SpellPopup::view(const int x, const int y)
     }
 
     setPosition(posX, posY);
-    setVisible(true);
+    setVisible(Visible_true);
     requestMoveToTop();
 }
 
@@ -119,5 +119,5 @@ void SpellPopup::mouseMoved(MouseEvent &event)
     Popup::mouseMoved(event);
 
     // When the mouse moved on top of the popup, hide it
-    setVisible(false);
+    setVisible(Visible_false);
 }
diff --git a/src/gui/popups/statuspopup.cpp b/src/gui/popups/statuspopup.cpp
index 17894f04c..f69d72574 100644
--- a/src/gui/popups/statuspopup.cpp
+++ b/src/gui/popups/statuspopup.cpp
@@ -118,7 +118,7 @@ void StatusPopup::view(const int x, const int y)
     update();
 
     setPosition(posX, posY);
-    setVisible(true);
+    setVisible(Visible_true);
     requestMoveToTop();
 }
 
diff --git a/src/gui/popups/textboxpopup.cpp b/src/gui/popups/textboxpopup.cpp
index 1d8d85a14..9006fe49f 100644
--- a/src/gui/popups/textboxpopup.cpp
+++ b/src/gui/popups/textboxpopup.cpp
@@ -68,7 +68,7 @@ void TextBoxPopup::show(const int x, const int y, const std::string &str)
         posY = y - rect.height - distance;
 
     setPosition(posX, posY);
-    setVisible(true);
+    setVisible(Visible_true);
     requestMoveToTop();
 }
 
@@ -77,5 +77,5 @@ void TextBoxPopup::mouseMoved(MouseEvent &event)
     Popup::mouseMoved(event);
 
     // When the mouse moved on top of the popup, hide it
-    setVisible(false);
+    setVisible(Visible_false);
 }
diff --git a/src/gui/popups/textpopup.cpp b/src/gui/popups/textpopup.cpp
index 8387e394d..511816586 100644
--- a/src/gui/popups/textpopup.cpp
+++ b/src/gui/popups/textpopup.cpp
@@ -99,7 +99,7 @@ void TextPopup::show(const int x, const int y, const std::string &str1,
         posY = y - rect.height - distance;
 
     setPosition(posX, posY);
-    setVisible(true);
+    setVisible(Visible_true);
     requestMoveToTop();
 }
 
@@ -108,5 +108,5 @@ void TextPopup::mouseMoved(MouseEvent &event)
     Popup::mouseMoved(event);
 
     // When the mouse moved on top of the popup, hide it
-    setVisible(false);
+    setVisible(Visible_false);
 }
diff --git a/src/gui/widgets/basiccontainer.cpp b/src/gui/widgets/basiccontainer.cpp
index e8f29ff9b..bcf30a27f 100644
--- a/src/gui/widgets/basiccontainer.cpp
+++ b/src/gui/widgets/basiccontainer.cpp
@@ -220,7 +220,7 @@ Widget *BasicContainer::getWidgetAt(int x, int y)
 void BasicContainer::logic()
 {
     BLOCK_START("BasicContainer::logic")
-    if (!mVisible)
+    if (mVisible == Visible_false)
     {
         BLOCK_END("BasicContainer::logic")
         return;
diff --git a/src/gui/widgets/characterdisplay.cpp b/src/gui/widgets/characterdisplay.cpp
index de4b4bc00..df0032990 100644
--- a/src/gui/widgets/characterdisplay.cpp
+++ b/src/gui/widgets/characterdisplay.cpp
@@ -113,12 +113,12 @@ void CharacterDisplay::update()
 
 void CharacterDisplay::widgetHidden(const Event &event A_UNUSED)
 {
-    textPopup->setVisible(false);
+    textPopup->setVisible(Visible_false);
 }
 
 void CharacterDisplay::mouseExited(MouseEvent &event A_UNUSED)
 {
-    textPopup->setVisible(false);
+    textPopup->setVisible(Visible_false);
 }
 
 void CharacterDisplay::mouseMoved(MouseEvent &event A_UNUSED)
@@ -140,7 +140,7 @@ void CharacterDisplay::mouseMoved(MouseEvent &event A_UNUSED)
     }
     else
     {
-        textPopup->setVisible(false);
+        textPopup->setVisible(Visible_false);
     }
 }
 
diff --git a/src/gui/widgets/characterviewnormal.cpp b/src/gui/widgets/characterviewnormal.cpp
index a4b9271e3..c28723004 100644
--- a/src/gui/widgets/characterviewnormal.cpp
+++ b/src/gui/widgets/characterviewnormal.cpp
@@ -41,7 +41,7 @@ CharacterViewNormal::CharacterViewNormal(CharSelectDialog *const widget,
         {
             CharacterDisplay *const character = *it;
             add(character);
-            character->setVisible(true);
+            character->setVisible(Visible_true);
         }
         const size_t sz = mCharacterEntries->size();
         if (mSelected >= 0 && mSelected < static_cast<signed>(sz))
diff --git a/src/gui/widgets/characterviewsmall.cpp b/src/gui/widgets/characterviewsmall.cpp
index fd9240936..36749022a 100644
--- a/src/gui/widgets/characterviewsmall.cpp
+++ b/src/gui/widgets/characterviewsmall.cpp
@@ -52,7 +52,7 @@ CharacterViewSmall::CharacterViewSmall(CharSelectDialog *const widget,
         {
             mSelected = 0;
             mSelectedEntry = (*mCharacterEntries)[mSelected];
-            mSelectedEntry->setVisible(true);
+            mSelectedEntry->setVisible(Visible_true);
             mNumber->setCaption(strprintf("%d / %d", mSelected + 1, sz));
             mNumber->adjustSize();
         }
@@ -82,7 +82,7 @@ void CharacterViewSmall::show(const int i)
     if (sz <= 0)
         return;
     if (mSelectedEntry)
-        mSelectedEntry->setVisible(false);
+        mSelectedEntry->setVisible(Visible_false);
     if (i >= sz)
         mSelected = 0;
     else if (i < 0)
@@ -90,7 +90,7 @@ void CharacterViewSmall::show(const int i)
     else
         mSelected = i;
     mSelectedEntry = (*mCharacterEntries)[mSelected];
-    mSelectedEntry->setVisible(true);
+    mSelectedEntry->setVisible(Visible_true);
     mNumber->setCaption(strprintf("%d / %d", mSelected + 1, sz));
     mNumber->adjustSize();
 }
diff --git a/src/gui/widgets/chatinput.h b/src/gui/widgets/chatinput.h
index b1a22d3fb..592299312 100644
--- a/src/gui/widgets/chatinput.h
+++ b/src/gui/widgets/chatinput.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WIDGETS_CHATINPUT_H
 #define GUI_WIDGETS_CHATINPUT_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/windows/chatwindow.h"
 
 #include "configuration.h"
@@ -44,7 +46,7 @@ class ChatInput final : public TextField
             mWindow(window),
             mFocusGaining(false)
         {
-            setVisible(false);
+            setVisible(Visible_false);
             addFocusListener(this);
         }
 
@@ -59,7 +61,7 @@ class ChatInput final : public TextField
             TextField::focusLost(event);
             if (mFocusGaining || !config.getBoolValue("protectChatFocus"))
             {
-                processVisible(false);
+                processVisible(Visible_false);
                 if (chatWindow)
                     chatWindow->updateVisibility();
                 mFocusGaining = false;
@@ -70,12 +72,12 @@ class ChatInput final : public TextField
             mFocusGaining = false;
         }
 
-        void processVisible(const bool n)
+        void processVisible(const Visible n)
         {
-            if (!mWindow || isVisible() == n)
+            if (!mWindow || isVisible() == (n == Visible_true))
                 return;
 
-            if (!n)
+            if (n == Visible_false)
                 mFocusGaining = true;
             setVisible(n);
             if (config.getBoolValue("hideChatInput")
@@ -92,7 +94,7 @@ class ChatInput final : public TextField
         void unprotectFocus()
         { mFocusGaining = true; }
 
-        void setVisible(bool visible)
+        void setVisible(Visible visible)
         {
             TextField::setVisible(visible);
         }
diff --git a/src/gui/widgets/checkbox.cpp b/src/gui/widgets/checkbox.cpp
index 27e7d563b..90192c74a 100644
--- a/src/gui/widgets/checkbox.cpp
+++ b/src/gui/widgets/checkbox.cpp
@@ -218,7 +218,7 @@ void CheckBox::drawBox(Graphics *const graphics)
     const ImageRect &rect = mSkin->getBorder();
     int index = 0;
 
-    if (mEnabled && mVisible)
+    if (mEnabled && mVisible == Visible_true)
     {
         if (mSelected)
         {
diff --git a/src/gui/widgets/dropdown.cpp b/src/gui/widgets/dropdown.cpp
index a16381c2a..db5caf6f7 100644
--- a/src/gui/widgets/dropdown.cpp
+++ b/src/gui/widgets/dropdown.cpp
@@ -373,7 +373,7 @@ void DropDown::hideDrop(bool event)
 {
     if (event)
         distributeActionEvent();
-    mPopup->setVisible(false);
+    mPopup->setVisible(Visible_false);
 }
 
 void DropDown::mousePressed(MouseEvent& event)
diff --git a/src/gui/widgets/emoteshortcutcontainer.cpp b/src/gui/widgets/emoteshortcutcontainer.cpp
index 97f012e89..05037cd51 100644
--- a/src/gui/widgets/emoteshortcutcontainer.cpp
+++ b/src/gui/widgets/emoteshortcutcontainer.cpp
@@ -248,7 +248,7 @@ void EmoteShortcutContainer::mouseMoved(MouseEvent &event)
     if (index == -1)
         return;
 
-    textPopup->setVisible(false);
+    textPopup->setVisible(Visible_false);
 
     if (static_cast<size_t>(index) < mEmoteImg.size() && mEmoteImg[index])
     {
@@ -261,11 +261,11 @@ void EmoteShortcutContainer::mouseMoved(MouseEvent &event)
 void EmoteShortcutContainer::mouseExited(MouseEvent &event A_UNUSED)
 {
     if (textPopup)
-        textPopup->setVisible(false);
+        textPopup->setVisible(Visible_false);
 }
 
 void EmoteShortcutContainer::widgetHidden(const Event &event A_UNUSED)
 {
     if (textPopup)
-        textPopup->setVisible(false);
+        textPopup->setVisible(Visible_false);
 }
diff --git a/src/gui/widgets/itemcontainer.cpp b/src/gui/widgets/itemcontainer.cpp
index ee95f1e61..9024f74be 100644
--- a/src/gui/widgets/itemcontainer.cpp
+++ b/src/gui/widgets/itemcontainer.cpp
@@ -683,13 +683,13 @@ void ItemContainer::mouseMoved(MouseEvent &event)
     }
     else
     {
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
     }
 }
 
 void ItemContainer::mouseExited(MouseEvent &event A_UNUSED)
 {
-    itemPopup->setVisible(false);
+    itemPopup->setVisible(Visible_false);
 }
 
 void ItemContainer::widgetResized(const Event &event A_UNUSED)
diff --git a/src/gui/widgets/itemlinkhandler.cpp b/src/gui/widgets/itemlinkhandler.cpp
index 7008602de..70b4e19e5 100644
--- a/src/gui/widgets/itemlinkhandler.cpp
+++ b/src/gui/widgets/itemlinkhandler.cpp
@@ -116,7 +116,7 @@ void ItemLinkHandler::handleLink(const std::string &link, MouseEvent *event)
             itemPopup->setItem(itemInfo, color, true);
             if (itemPopup->isPopupVisible())
             {
-                itemPopup->setVisible(false);
+                itemPopup->setVisible(Visible_false);
             }
             else if (viewport)
             {
diff --git a/src/gui/widgets/itemshortcutcontainer.cpp b/src/gui/widgets/itemshortcutcontainer.cpp
index a0c807963..6a2aa4c93 100644
--- a/src/gui/widgets/itemshortcutcontainer.cpp
+++ b/src/gui/widgets/itemshortcutcontainer.cpp
@@ -545,7 +545,7 @@ void ItemShortcutContainer::mouseMoved(MouseEvent &event)
 
     if (itemId < SPELL_MIN_ID)
     {
-        spellPopup->setVisible(false);
+        spellPopup->setVisible(Visible_false);
 
         Inventory *const inv = PlayerInfo::getInventory();
         if (!inv)
@@ -559,12 +559,12 @@ void ItemShortcutContainer::mouseMoved(MouseEvent &event)
         }
         else
         {
-            itemPopup->setVisible(false);
+            itemPopup->setVisible(Visible_false);
         }
     }
     else if (itemId < SKILL_MIN_ID && spellManager)
     {
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
         const TextCommand *const spell = spellManager->getSpellByItem(itemId);
         if (spell && viewport)
         {
@@ -573,12 +573,12 @@ void ItemShortcutContainer::mouseMoved(MouseEvent &event)
         }
         else
         {
-            spellPopup->setVisible(false);
+            spellPopup->setVisible(Visible_false);
         }
     }
     else if (skillDialog)
     {
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
     }
 }
 
@@ -586,15 +586,15 @@ void ItemShortcutContainer::mouseMoved(MouseEvent &event)
 void ItemShortcutContainer::mouseExited(MouseEvent &event A_UNUSED)
 {
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
     if (spellPopup)
-        spellPopup->setVisible(false);
+        spellPopup->setVisible(Visible_false);
 }
 
 void ItemShortcutContainer::widgetHidden(const Event &event A_UNUSED)
 {
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
     if (spellPopup)
-        spellPopup->setVisible(false);
+        spellPopup->setVisible(Visible_false);
 }
diff --git a/src/gui/widgets/popup.cpp b/src/gui/widgets/popup.cpp
index 1f064329d..181d6a46b 100644
--- a/src/gui/widgets/popup.cpp
+++ b/src/gui/widgets/popup.cpp
@@ -74,7 +74,7 @@ Popup::Popup(const std::string &name,
         windowContainer->add(this);
 
     // Popups are invisible by default
-    setVisible(false);
+    setVisible(Visible_false);
 }
 
 Popup::~Popup()
@@ -241,7 +241,7 @@ void Popup::position(const int x, const int y)
         posY = y - height - distance;
 
     setPosition(posX, posY);
-    setVisible(true);
+    setVisible(Visible_true);
     requestMoveToTop();
     mRedraw = true;
 }
@@ -258,7 +258,7 @@ void Popup::mouseMoved(MouseEvent &event A_UNUSED)
 
 void Popup::hide()
 {
-    setVisible(false);
+    setVisible(Visible_false);
     mRedraw = true;
 }
 
diff --git a/src/gui/widgets/popup.h b/src/gui/widgets/popup.h
index d1dbb4829..fb00930bb 100644
--- a/src/gui/widgets/popup.h
+++ b/src/gui/widgets/popup.h
@@ -171,7 +171,7 @@ class Popup notfinal : public Container,
         void widgetMoved(const Event &event) override final;
 
         bool isPopupVisible() const
-        { return mVisible; }
+        { return mVisible == Visible_true; }
 
         virtual void postInit()
         { mInit = true; }
diff --git a/src/gui/widgets/popuplist.cpp b/src/gui/widgets/popuplist.cpp
index d8c1d79dc..17f026388 100644
--- a/src/gui/widgets/popuplist.cpp
+++ b/src/gui/widgets/popuplist.cpp
@@ -88,7 +88,7 @@ void PopupList::show(int x, int y)
     if (mainGraphics->mHeight < (y + height + 5))
         y = mainGraphics->mHeight - height;
     setPosition(x, y);
-    setVisible(true);
+    setVisible(Visible_true);
     requestMoveToTop();
     if (mModal == Modal_true)
         requestModalFocus();
@@ -154,7 +154,7 @@ void PopupList::mouseReleased(MouseEvent& event)
         return;
     if (mDropDown)
         mDropDown->updateSelection();
-    setVisible(false);
+    setVisible(Visible_false);
     if (mModal == Modal_true)
         releaseModalFocus();
 }
@@ -162,15 +162,18 @@ void PopupList::mouseReleased(MouseEvent& event)
 void PopupList::focusGained(const Event& event)
 {
     const Widget *const source = event.getSource();
-    if (!mVisible || source == this || source == mListBox
-        || source == mScrollArea || source == mDropDown)
+    if (mVisible == Visible_false ||
+        source == this ||
+        source == mListBox ||
+        source == mScrollArea ||
+        source == mDropDown)
     {
         return;
     }
 
     if (mDropDown)
         mDropDown->updateSelection();
-    setVisible(false);
+    setVisible(Visible_false);
     if (mModal == Modal_true)
         releaseModalFocus();
 }
diff --git a/src/gui/widgets/radiobutton.cpp b/src/gui/widgets/radiobutton.cpp
index 30749da66..f1730b367 100644
--- a/src/gui/widgets/radiobutton.cpp
+++ b/src/gui/widgets/radiobutton.cpp
@@ -187,7 +187,7 @@ void RadioButton::drawBox(Graphics* graphics)
     const ImageRect &rect = mSkin->getBorder();
     int index = 0;
 
-    if (mEnabled && mVisible)
+    if (mEnabled && mVisible == Visible_true)
     {
         if (mSelected)
         {
diff --git a/src/gui/widgets/selldialog.cpp b/src/gui/widgets/selldialog.cpp
index 5422ea3b0..3864fd46c 100644
--- a/src/gui/widgets/selldialog.cpp
+++ b/src/gui/widgets/selldialog.cpp
@@ -159,7 +159,7 @@ void SellDialog::postInit()
     loadWindowState();
 
     instances.push_back(this);
-    setVisible(true);
+    setVisible(Visible_true);
     enableVisibleSound(true);
 }
 
@@ -327,11 +327,11 @@ void SellDialog::updateButtonsAndLabels()
         item->update();
 }
 
-void SellDialog::setVisible(bool visible)
+void SellDialog::setVisible(Visible visible)
 {
     Window::setVisible(visible);
 
-    if (visible)
+    if (visible == Visible_true)
     {
         if (mShopItemList)
             mShopItemList->requestFocus();
diff --git a/src/gui/widgets/selldialog.h b/src/gui/widgets/selldialog.h
index 1d0bed7e1..439042a10 100644
--- a/src/gui/widgets/selldialog.h
+++ b/src/gui/widgets/selldialog.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WIDGETS_SELLDIALOG_H
 #define GUI_WIDGETS_SELLDIALOG_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
@@ -88,7 +90,7 @@ class SellDialog notfinal : public Window,
         /**
          * Sets the visibility of this window.
          */
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         void addItem(const int id,
                      const int type,
diff --git a/src/gui/widgets/shoplistbox.cpp b/src/gui/widgets/shoplistbox.cpp
index 63a295c1e..a5e5937ef 100644
--- a/src/gui/widgets/shoplistbox.cpp
+++ b/src/gui/widgets/shoplistbox.cpp
@@ -223,7 +223,7 @@ void ShopListBox::mouseMoved(MouseEvent &event)
         }
         else
         {
-            itemPopup->setVisible(false);
+            itemPopup->setVisible(Visible_false);
         }
     }
 }
diff --git a/src/gui/widgets/skillinfo.cpp b/src/gui/widgets/skillinfo.cpp
index 80783a4b2..d16994bae 100644
--- a/src/gui/widgets/skillinfo.cpp
+++ b/src/gui/widgets/skillinfo.cpp
@@ -59,8 +59,8 @@ SkillInfo::SkillInfo() :
     type(SkillType::Unknown),
     owner(SkillOwner::Player),
     modifiable(Modifiable_false),
-    visible(false),
-    alwaysVisible(false)
+    visible(Visible_false),
+    alwaysVisible(Visible_false)
 {
     dataMap[0] = new SkillData();
     data = dataMap[0];
@@ -80,17 +80,17 @@ void SkillInfo::update()
 
     if (modifiable == Modifiable_false && baseLevel == 0 && exp.second == 0)
     {
-        if (visible)
+        if (visible == Visible_true)
         {
-            visible = false;
+            visible = Visible_false;
             if (model)
                 model->updateVisibilities();
         }
         return;
     }
 
-    const bool updateVisibility = !visible;
-    visible = true;
+    const bool updateVisibility = (visible == Visible_false);
+    visible = Visible_true;
 
     if (baseLevel == 0)
     {
diff --git a/src/gui/widgets/skillinfo.h b/src/gui/widgets/skillinfo.h
index 8919ed30a..e2679713d 100644
--- a/src/gui/widgets/skillinfo.h
+++ b/src/gui/widgets/skillinfo.h
@@ -24,6 +24,7 @@
 #define GUI_WIDGETS_SKILLINFO_H
 
 #include "enums/simpletypes/modifiable.h"
+#include "enums/simpletypes/visible.h"
 
 #include "gui/color.h"
 
@@ -69,8 +70,8 @@ struct SkillInfo final
     SkillType::SkillType type;
     SkillOwner::Type owner;
     Modifiable modifiable;
-    bool visible;
-    bool alwaysVisible;
+    Visible visible;
+    Visible alwaysVisible;
 
     SkillInfo();
     A_DELETE_COPY(SkillInfo)
diff --git a/src/gui/widgets/spellshortcutcontainer.cpp b/src/gui/widgets/spellshortcutcontainer.cpp
index 5a0de0995..7971e0d33 100644
--- a/src/gui/widgets/spellshortcutcontainer.cpp
+++ b/src/gui/widgets/spellshortcutcontainer.cpp
@@ -336,7 +336,7 @@ void SpellShortcutContainer::mouseMoved(MouseEvent &event)
         return;
 
     const int itemId = getItemByIndex(index);
-    spellPopup->setVisible(false);
+    spellPopup->setVisible(Visible_false);
     const TextCommand *const spell = spellManager->getSpell(itemId);
     if (spell && !spell->isEmpty())
     {
@@ -345,20 +345,20 @@ void SpellShortcutContainer::mouseMoved(MouseEvent &event)
     }
     else
     {
-        spellPopup->setVisible(false);
+        spellPopup->setVisible(Visible_false);
     }
 }
 
 void SpellShortcutContainer::mouseExited(MouseEvent &event A_UNUSED)
 {
     if (spellPopup)
-        spellPopup->setVisible(false);
+        spellPopup->setVisible(Visible_false);
 }
 
 void SpellShortcutContainer::widgetHidden(const Event &event A_UNUSED)
 {
     if (spellPopup)
-        spellPopup->setVisible(false);
+        spellPopup->setVisible(Visible_false);
 }
 
 int SpellShortcutContainer::getItemByIndex(const int index) const
diff --git a/src/gui/widgets/tabbedarea.cpp b/src/gui/widgets/tabbedarea.cpp
index eb70c8012..e00123af6 100644
--- a/src/gui/widgets/tabbedarea.cpp
+++ b/src/gui/widgets/tabbedarea.cpp
@@ -646,13 +646,13 @@ void TabbedArea::updateArrowEnableState()
         - mArrowButton[0]->getWidth()
         - mArrowButton[1]->getWidth() - mRightMargin)
     {
-        mArrowButton[0]->setVisible(true);
-        mArrowButton[1]->setVisible(true);
+        mArrowButton[0]->setVisible(Visible_true);
+        mArrowButton[1]->setVisible(Visible_true);
     }
     else
     {
-        mArrowButton[0]->setVisible(false);
-        mArrowButton[1]->setVisible(false);
+        mArrowButton[0]->setVisible(Visible_false);
+        mArrowButton[1]->setVisible(Visible_false);
         mTabScrollIndex = 0;
     }
 
diff --git a/src/gui/widgets/virtshortcutcontainer.cpp b/src/gui/widgets/virtshortcutcontainer.cpp
index 138d3f5a6..30dbe3770 100644
--- a/src/gui/widgets/virtshortcutcontainer.cpp
+++ b/src/gui/widgets/virtshortcutcontainer.cpp
@@ -365,18 +365,18 @@ void VirtShortcutContainer::mouseMoved(MouseEvent &event)
     }
     else
     {
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
     }
 }
 
 void VirtShortcutContainer::mouseExited(MouseEvent &event A_UNUSED)
 {
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
 }
 
 void VirtShortcutContainer::widgetHidden(const Event &event A_UNUSED)
 {
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
 }
diff --git a/src/gui/widgets/widget.cpp b/src/gui/widgets/widget.cpp
index f6f3854f4..3be80c772 100644
--- a/src/gui/widgets/widget.cpp
+++ b/src/gui/widgets/widget.cpp
@@ -99,7 +99,7 @@ Widget::Widget(const Widget2 *const widget) :
     mCurrentFont(nullptr),
     mFrameSize(0),
     mFocusable(false),
-    mVisible(true),
+    mVisible(Visible_true),
     mTabIn(true),
     mTabOut(true),
     mEnabled(true),
@@ -217,12 +217,12 @@ void Widget::requestMoveToBottom()
         mParent->moveToBottom(this);
 }
 
-void Widget::setVisible(bool visible)
+void Widget::setVisible(Visible visible)
 {
-    if (!visible && isFocused() && mFocusHandler)
+    if (visible == Visible_false && isFocused() && mFocusHandler)
         mFocusHandler->focusNone();
 
-    if (visible)
+    if (visible == Visible_true)
         distributeShownEvent();
     else
         distributeHiddenEvent();
diff --git a/src/gui/widgets/widget.h b/src/gui/widgets/widget.h
index 2c8c121e0..3abc8d232 100644
--- a/src/gui/widgets/widget.h
+++ b/src/gui/widgets/widget.h
@@ -64,10 +64,11 @@
 #ifndef GUI_WIDGETS_WIDGET_H
 #define GUI_WIDGETS_WIDGET_H
 
-#include <list>
+#include "enums/simpletypes/visible.h"
 
 #include "gui/widgets/widget2.h"
 
+#include <list>
 #include "localconsts.h"
 
 class ActionListener;
@@ -387,7 +388,7 @@ class Widget notfinal : public Widget2
           * @see isVisible
           * @since 0.1.0
           */
-        void setVisible(bool visible);
+        void setVisible(Visible visible);
 
         /**
           * Checks if the widget is visible.
@@ -397,10 +398,12 @@ class Widget notfinal : public Widget2
           * @since 0.1.0
           */
         bool isVisible() const A_WARN_UNUSED
-        { return mVisible && (!mParent || mParent->isVisible()); }
+        { return mVisible == Visible_true &&
+            (!mParent || mParent->isVisible());
+        }
 
         bool isVisibleLocal() const A_WARN_UNUSED
-        { return mVisible; }
+        { return mVisible == Visible_true; }
 
         /**
           * Sets the base color of the widget.
@@ -1216,7 +1219,7 @@ class Widget notfinal : public Widget2
         /**
           * True if the widget visible, false otherwise.
           */
-        bool mVisible;
+        Visible mVisible;
 
         /**
           * True if the widget has tab in enabled, false otherwise.
diff --git a/src/gui/widgets/window.cpp b/src/gui/widgets/window.cpp
index f4921e7ca..a48b2c062 100644
--- a/src/gui/widgets/window.cpp
+++ b/src/gui/widgets/window.cpp
@@ -221,7 +221,7 @@ Window::Window(const std::string &caption,
     }
 
     // Windows are invisible by default
-    setVisible(false);
+    setVisible(Visible_false);
 
     addWidgetListener(this);
     mForegroundColor = getThemeColor(Theme::WINDOW);
@@ -737,27 +737,32 @@ void Window::setStickyButtonLock(const bool lock)
     mStickyButton = lock;
 }
 
-void Window::setVisible(bool visible)
+void Window::setVisible(Visible visible)
 {
     setVisible(visible, false);
 }
 
-void Window::setVisible(const bool visible, const bool forceSticky)
+void Window::setVisible(const Visible visible, const bool forceSticky)
 {
     if (visible == mVisible)
         return;
 
     // Check if the window is off screen...
-    if (visible)
+    if (visible == Visible_true)
         ensureOnScreen();
     else
         mResizeHandles = 0;
 
     if (mStickyButtonLock)
+    {
         BasicContainer2::setVisible(visible);
+    }
     else
-        BasicContainer2::setVisible((!forceSticky && mSticky) || visible);
-    if (visible)
+    {
+        BasicContainer2::setVisible(fromBool((!forceSticky && mSticky) ||
+            visible == Visible_true, Visible));
+    }
+    if (visible == Visible_true)
     {
         if (mPlayVisibleSound)
             soundManager.playGuiSound(SOUND_SHOW_WINDOW);
@@ -852,7 +857,7 @@ void Window::mousePressed(MouseEvent &event)
 
 void Window::close()
 {
-    setVisible(false);
+    setVisible(Visible_false);
 }
 
 void Window::mouseReleased(MouseEvent &event A_UNUSED)
@@ -1044,8 +1049,8 @@ void Window::loadWindowState()
 
     if (mSaveVisible)
     {
-        setVisible(config.getValueBool(name
-            + "Visible", mDefaultVisible));
+        setVisible(fromBool(config.getValueBool(name
+            + "Visible", mDefaultVisible), Visible));
     }
 
     if (mStickyButton)
diff --git a/src/gui/widgets/window.h b/src/gui/widgets/window.h
index 102aedf73..f6e777e03 100644
--- a/src/gui/widgets/window.h
+++ b/src/gui/widgets/window.h
@@ -67,6 +67,7 @@
 #define GUI_WIDGETS_WINDOW_H
 
 #include "enums/simpletypes/modal.h"
+#include "enums/simpletypes/visible.h"
 
 #include "listeners/mouselistener.h"
 #include "listeners/widgetlistener.h"
@@ -257,13 +258,13 @@ class Window notfinal : public BasicContainer2,
          * Overloads window setVisible by Guichan to allow sticky window
          * handling.
          */
-        virtual void setVisible(bool visible);
+        virtual void setVisible(Visible visible);
 
         /**
          * Overloads window setVisible by Guichan to allow sticky window
          * handling, or not, if you force the sticky state.
          */
-        void setVisible(const bool visible, const bool forceSticky);
+        void setVisible(const Visible visible, const bool forceSticky);
 
         /**
          * Returns whether the window is visible by default.
@@ -466,7 +467,7 @@ class Window notfinal : public BasicContainer2,
         { mPlayVisibleSound = b; }
 
         bool isWindowVisible() const A_WARN_UNUSED
-        { return mVisible; }
+        { return mVisible == Visible_true; }
 
         /**
          * Sets the padding of the window. The padding is the distance between the
diff --git a/src/gui/windowmenu.cpp b/src/gui/windowmenu.cpp
index 1e1f236df..012fd5a49 100644
--- a/src/gui/windowmenu.cpp
+++ b/src/gui/windowmenu.cpp
@@ -82,9 +82,9 @@ WindowMenu::WindowMenu(const Widget2 *const widget) :
     addButton(N_("CH"),
         _("Chat"), x, h, InputAction::WINDOW_CHAT,
 #ifdef ANDROID
-        true);
+        Visible_true);
 #else
-        false);
+        Visible_false);
 #endif
     // TRANSLATORS: short button name for status window.
     addButton(N_("STA"),
@@ -100,7 +100,8 @@ WindowMenu::WindowMenu(const Widget2 *const widget) :
         _("Cart"), x, h, InputAction::WINDOW_CART);
     // TRANSLATORS: short button name for map window.
     addButton(N_("MAP"),
-        _("Map"), x, h, InputAction::WINDOW_MINIMAP, false);
+        _("Map"), x, h, InputAction::WINDOW_MINIMAP,
+        Visible_false);
 
     if (skillDialog->hasSkills())
     {
@@ -124,44 +125,52 @@ WindowMenu::WindowMenu(const Widget2 *const widget) :
     // TRANSLATORS: short button name for drops window.
     addButton(N_("DR"),
         // TRANSLATORS: full button name
-        _("Drop"), x, h, InputAction::WINDOW_DROP, false);
+        _("Drop"), x, h, InputAction::WINDOW_DROP,
+        Visible_false);
     // TRANSLATORS: short button name for did you know window.
     addButton(N_("YK"),
         // TRANSLATORS: full button name
-        _("Did you know"), x, h, InputAction::WINDOW_DIDYOUKNOW, false);
+        _("Did you know"), x, h, InputAction::WINDOW_DIDYOUKNOW,
+        Visible_false);
     // TRANSLATORS: short button name for shop window.
     addButton(N_("SHP"),
         // TRANSLATORS: full button name
-        _("Shop"), x, h, InputAction::WINDOW_SHOP, false);
+        _("Shop"), x, h, InputAction::WINDOW_SHOP,
+        Visible_false);
     // TRANSLATORS: short button name for outfits window.
     addButton(N_("OU"),
         // TRANSLATORS: full button name
-        _("Outfits"), x, h, InputAction::WINDOW_OUTFIT, false);
+        _("Outfits"), x, h, InputAction::WINDOW_OUTFIT,
+        Visible_false);
     // TRANSLATORS: short button name for updates window.
     addButton(N_("UP"),
         // TRANSLATORS: full button name
-        _("Updates"), x, h, InputAction::WINDOW_UPDATER, false);
+        _("Updates"), x, h, InputAction::WINDOW_UPDATER,
+        Visible_false);
     // TRANSLATORS: short button name for bank window.
     addButton(N_("BA"),
         // TRANSLATORS: full button name
-        _("Bank"), x, h, InputAction::WINDOW_BANK, false);
+        _("Bank"), x, h, InputAction::WINDOW_BANK,
+        Visible_false);
     // TRANSLATORS: short button name for mail window.
     addButton(N_("MA"),
         // TRANSLATORS: full button name
-        _("Mail"), x, h, InputAction::WINDOW_MAIL, false),
+        _("Mail"), x, h, InputAction::WINDOW_MAIL,
+        Visible_false),
     // TRANSLATORS: short button name for debug window.
     addButton(N_("DBG"),
         // TRANSLATORS: full button name
         _("Debug"), x, h, InputAction::WINDOW_DEBUG,
 #ifdef ANDROID
-        true);
+        Visible_true);
 #else
-        false);
+        Visible_false);
 #endif
     // TRANSLATORS: short button name for windows list menu.
     addButton(N_("WIN"),
         // TRANSLATORS: full button name
-        _("Windows"), x, h, InputAction::SHOW_WINDOWS, false);
+        _("Windows"), x, h, InputAction::SHOW_WINDOWS,
+        Visible_false);
     // TRANSLATORS: short button name for setup window.
     addButton(N_("SET"),
         // TRANSLATORS: full button name
@@ -174,7 +183,7 @@ WindowMenu::WindowMenu(const Widget2 *const widget) :
     loadButtons();
 
     addMouseListener(this);
-    setVisible(true);
+    setVisible(Visible_true);
 
     config.addListener("autohideButtons", this);
     mAutoHide = config.getIntValue("autohideButtons");
@@ -230,7 +239,7 @@ void WindowMenu::addButton(const char *const text,
                            int &restrict x,
                            int &restrict h,
                            const int key,
-                           const bool visible)
+                           const Visible visible)
 {
     Button *const btn = new Button(this, gettext(text), text, this);
     btn->setPosition(x, mPadding);
@@ -316,7 +325,8 @@ void WindowMenu::mouseExited(MouseEvent& event A_UNUSED)
     textPopup->hide();
 }
 
-void WindowMenu::showButton(const std::string &name, const bool visible)
+void WindowMenu::showButton(const std::string &name,
+                            const Visible visible)
 {
     const ButtonInfo *const info = mButtonNames[name];
     if (!info || !info->button)
@@ -363,9 +373,9 @@ void WindowMenu::loadButtons()
                  it_end = mButtonNames.end(); it != it_end; ++it)
             {
                 const ButtonInfo *const info = (*it).second;
-                if (!info || !info->button || info->visible)
+                if (!info || !info->button || info->visible == Visible_true)
                     continue;
-                info->button->setVisible(false);
+                info->button->setVisible(Visible_false);
             }
             updateButtons();
             return;
@@ -380,7 +390,7 @@ void WindowMenu::loadButtons()
             const ButtonInfo *const info = mButtonNames[str];
             if (!info || !info->button)
                 continue;
-            info->button->setVisible(false);
+            info->button->setVisible(Visible_false);
         }
     }
     else
@@ -394,7 +404,8 @@ void WindowMenu::loadButtons()
                 continue;
             Button *const button = info->button;
             const std::string &str = button->getActionEventId();
-            button->setVisible(str == "SET" || str == "WIN");
+            button->setVisible(fromBool(
+                str == "SET" || str == "WIN", Visible));
         }
     }
     updateButtons();
diff --git a/src/gui/windowmenu.h b/src/gui/windowmenu.h
index 9a26ae603..03bd86592 100644
--- a/src/gui/windowmenu.h
+++ b/src/gui/windowmenu.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWMENU_H
 #define GUI_WINDOWMENU_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/container.h"
 
 #include "listeners/actionlistener.h"
@@ -72,7 +74,7 @@ class WindowMenu final : public Container,
         std::vector <ButtonText*> &getButtonTexts() A_WARN_UNUSED
         { return mButtonTexts; }
 
-        void showButton(const std::string &name, const bool visible);
+        void showButton(const std::string &name, const Visible visible);
 
         void loadButtons();
 
@@ -92,8 +94,9 @@ class WindowMenu final : public Container,
     private:
         inline void addButton(const char *const text,
                               const std::string &description,
-                              int &restrict x, int &restrict h, const int key,
-                              const bool visible = true);
+                              int &restrict x, int &restrict h,
+                              const int key,
+                              const Visible visible = Visible_true);
 
         void updateButtons();
 
diff --git a/src/gui/windows/buydialog.cpp b/src/gui/windows/buydialog.cpp
index db8bed23e..63925ff28 100644
--- a/src/gui/windows/buydialog.cpp
+++ b/src/gui/windows/buydialog.cpp
@@ -329,7 +329,7 @@ void BuyDialog::init()
     enableVisibleSound(true);
 
     instances.push_back(this);
-    setVisible(true);
+    setVisible(Visible_true);
 
     if (mSortDropDown)
         mSortDropDown->setSelected(config.getIntValue("buySortOrder"));
@@ -629,11 +629,11 @@ void BuyDialog::updateButtonsAndLabels()
         Units::formatCurrency(mMoney - price).c_str()));
 }
 
-void BuyDialog::setVisible(bool visible)
+void BuyDialog::setVisible(Visible visible)
 {
     Window::setVisible(visible);
 
-    if (visible && mShopItemList)
+    if (visible == Visible_true && mShopItemList)
         mShopItemList->requestFocus();
     else
         scheduleDelete();
diff --git a/src/gui/windows/buydialog.h b/src/gui/windows/buydialog.h
index 504a63154..8dea72886 100644
--- a/src/gui/windows/buydialog.h
+++ b/src/gui/windows/buydialog.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWS_BUYDIALOG_H
 #define GUI_WINDOWS_BUYDIALOG_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
@@ -130,7 +132,7 @@ class BuyDialog final : public Window,
         /**
          * Sets the visibility of this window.
          */
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         void sort();
 
diff --git a/src/gui/windows/buyselldialog.cpp b/src/gui/windows/buyselldialog.cpp
index ea90f756a..15d4165f3 100644
--- a/src/gui/windows/buyselldialog.cpp
+++ b/src/gui/windows/buyselldialog.cpp
@@ -100,7 +100,7 @@ void BuySellDialog::init()
     enableVisibleSound(true);
 
     dialogInstances.push_back(this);
-    setVisible(true);
+    setVisible(Visible_true);
 }
 
 BuySellDialog::~BuySellDialog()
@@ -108,11 +108,11 @@ BuySellDialog::~BuySellDialog()
     dialogInstances.remove(this);
 }
 
-void BuySellDialog::setVisible(bool visible)
+void BuySellDialog::setVisible(Visible visible)
 {
     Window::setVisible(visible);
 
-    if (visible)
+    if (visible == Visible_true)
     {
         if (mBuyButton)
             mBuyButton->requestFocus();
diff --git a/src/gui/windows/buyselldialog.h b/src/gui/windows/buyselldialog.h
index 14121715f..573435846 100644
--- a/src/gui/windows/buyselldialog.h
+++ b/src/gui/windows/buyselldialog.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWS_BUYSELLDIALOG_H
 #define GUI_WINDOWS_BUYSELLDIALOG_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
@@ -54,7 +56,7 @@ class BuySellDialog final : public Window,
 
         void init();
 
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         /**
          * Called when receiving actions from the widgets.
diff --git a/src/gui/windows/charcreatedialog.cpp b/src/gui/windows/charcreatedialog.cpp
index 5ba652072..6ada41158 100644
--- a/src/gui/windows/charcreatedialog.cpp
+++ b/src/gui/windows/charcreatedialog.cpp
@@ -227,7 +227,7 @@ CharCreateDialog::CharCreateDialog(CharSelectDialog *const parent,
         mGenderStrip->addButton(_("M"), "m", false);
         // TRANSLATORS: one char size unknown character gender
         mGenderStrip->addButton(_("U"), "u", true);
-        mGenderStrip->setVisible(true);
+        mGenderStrip->setVisible(Visible_true);
         add(mGenderStrip);
 
         mGenderStrip->setPosition(385, 130);
@@ -323,7 +323,7 @@ CharCreateDialog::CharCreateDialog(CharSelectDialog *const parent,
     add(mCancelButton);
 
     center();
-    setVisible(true);
+    setVisible(Visible_true);
     mNameField->requestFocus();
 
     updateHair();
@@ -572,7 +572,7 @@ void CharCreateDialog::setAttributes(const StringVect &labels,
     updateSliders();
     if (!available)
     {
-        mAttributesLeft->setVisible(false);
+        mAttributesLeft->setVisible(Visible_false);
         h = y;
         setContentSize(w, h);
     }
diff --git a/src/gui/windows/charselectdialog.cpp b/src/gui/windows/charselectdialog.cpp
index c6e040065..5663ab387 100644
--- a/src/gui/windows/charselectdialog.cpp
+++ b/src/gui/windows/charselectdialog.cpp
@@ -141,7 +141,7 @@ CharSelectDialog::CharSelectDialog(LoginData *const data) :
     for (int i = 0; i < static_cast<int>(mLoginData->characterSlots); i++)
     {
         CharacterDisplay *const character = new CharacterDisplay(this, this);
-        character->setVisible(false);
+        character->setVisible(Visible_false);
         mCharacterEntries.push_back(character);
     }
 
@@ -188,7 +188,7 @@ CharSelectDialog::~CharSelectDialog()
 void CharSelectDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
     requestFocus();
 #ifdef EATHENA_SUPPORT
     if (charServerHandler->isNeedCreatePin())
@@ -493,7 +493,7 @@ void CharSelectDialog::attemptCharacterSelect(const int index)
     if (mLocked || !mCharacterEntries[index])
         return;
 
-    setVisible(false);
+    setVisible(Visible_false);
     if (mCharServerHandler)
     {
         mCharServerHandler->chooseCharacter(
diff --git a/src/gui/windows/chatwindow.cpp b/src/gui/windows/chatwindow.cpp
index 824ba4882..713ad5e53 100644
--- a/src/gui/windows/chatwindow.cpp
+++ b/src/gui/windows/chatwindow.cpp
@@ -176,7 +176,8 @@ ChatWindow::ChatWindow() :
     // Add key listener to chat input to be able to respond to up/down
     mChatInput->addKeyListener(this);
     mCurHist = mHistory.end();
-    mColorPicker->setVisible(config.getBoolValue("showChatColorsList"));
+    mColorPicker->setVisible(fromBool(config.getBoolValue(
+        "showChatColorsList"), Visible));
     updateTabsMargin();
 
     fillCommands();
@@ -285,13 +286,14 @@ void ChatWindow::adjustTabSize()
         w -= mEmoteButtonSpacing;
         y += mEmoteButtonY;
         mChatInput->setWidth(w);
-        mChatButton->setVisible(mChatInput->isVisibleLocal());
+        mChatButton->setVisible(fromBool(mChatInput->isVisibleLocal(),
+            Visible));
         mChatButton->setPosition(x, y);
     }
     else
     {
         mChatInput->setWidth(awFrame2);
-        mChatButton->setVisible(false);
+        mChatButton->setVisible(Visible_false);
     }
 
     const ChatTab *const tab = getFocused();
@@ -435,7 +437,7 @@ void ChatWindow::action(const ActionEvent &event)
             // If the chatWindow is shown up because you want to send a message
             // It should hide now
             if (mTmpVisible)
-                setVisible(false);
+                setVisible(Visible_false);
         }
     }
     else if (eventId == "emote")
@@ -496,8 +498,8 @@ void ChatWindow::action(const ActionEvent &event)
     if (mColorPicker && mColorPicker->isVisibleLocal()
         != config.getBoolValue("showChatColorsList"))
     {
-        mColorPicker->setVisible(config.getBoolValue(
-            "showChatColorsList"));
+        mColorPicker->setVisible(fromBool(config.getBoolValue(
+            "showChatColorsList"), Visible));
     }
 }
 
@@ -506,7 +508,7 @@ bool ChatWindow::requestChatFocus()
     // Make sure chatWindow is visible
     if (!isWindowVisible())
     {
-        setVisible(true);
+        setVisible(Visible_true);
 
         /*
          * This is used to hide chatWindow after sending the message. There is
@@ -521,7 +523,7 @@ bool ChatWindow::requestChatFocus()
         return false;
 
     // Give focus to the chat input
-    mChatInput->processVisible(true);
+    mChatInput->processVisible(Visible_true);
     unHideWindow();
     mChatInput->requestFocus();
     return true;
@@ -814,7 +816,7 @@ void ChatWindow::keyPressed(KeyEvent &event)
     else if (actionId == static_cast<int>(InputAction::GUI_CANCEL) &&
              mChatInput->isVisibleLocal())
     {
-        mChatInput->processVisible(false);
+        mChatInput->processVisible(Visible_false);
     }
     else if (actionId == static_cast<int>(InputAction::CHAT_PREV_HISTORY) &&
              mChatInput->isVisibleLocal())
@@ -1022,7 +1024,7 @@ void ChatWindow::addItemText(const std::string &item)
     addInputText(text.str());
 }
 
-void ChatWindow::setVisible(bool visible)
+void ChatWindow::setVisible(Visible visible)
 {
     Window::setVisible(visible);
 
diff --git a/src/gui/windows/chatwindow.h b/src/gui/windows/chatwindow.h
index e8d920897..a91178a97 100644
--- a/src/gui/windows/chatwindow.h
+++ b/src/gui/windows/chatwindow.h
@@ -26,6 +26,7 @@
 #include "enums/gui/chatmsgtype.h"
 
 #include "enums/simpletypes/ignorerecord.h"
+#include "enums/simpletypes/visible.h"
 #include "enums/simpletypes/tryremovecolors.h"
 
 #include "gui/widgets/window.h"
@@ -156,7 +157,7 @@ class ChatWindow final : public Window,
         void addItemText(const std::string &item);
 
         /** Override to reset mTmpVisible */
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         /**
          * Handles mouse when dragged.
diff --git a/src/gui/windows/confirmdialog.cpp b/src/gui/windows/confirmdialog.cpp
index 4298598d2..5b2ab5de0 100644
--- a/src/gui/windows/confirmdialog.cpp
+++ b/src/gui/windows/confirmdialog.cpp
@@ -105,7 +105,7 @@ void ConfirmDialog::postInit()
         center();
         getParent()->moveToTop(this);
     }
-    setVisible(true);
+    setVisible(Visible_true);
     yesButton->requestFocus();
 }
 
diff --git a/src/gui/windows/connectiondialog.cpp b/src/gui/windows/connectiondialog.cpp
index d7d099d38..4ccab789f 100644
--- a/src/gui/windows/connectiondialog.cpp
+++ b/src/gui/windows/connectiondialog.cpp
@@ -64,7 +64,7 @@ ConnectionDialog::ConnectionDialog(const std::string &text,
 void ConnectionDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
 }
 
 void ConnectionDialog::action(const ActionEvent &)
diff --git a/src/gui/windows/didyouknowwindow.cpp b/src/gui/windows/didyouknowwindow.cpp
index 2916ad90c..ce078f8dd 100644
--- a/src/gui/windows/didyouknowwindow.cpp
+++ b/src/gui/windows/didyouknowwindow.cpp
@@ -112,7 +112,7 @@ void DidYouKnowWindow::action(const ActionEvent &event)
     const std::string &eventId = event.getId();
     if (eventId == "close")
     {
-        setVisible(false);
+        setVisible(Visible_false);
     }
     else
     {
@@ -177,10 +177,10 @@ void DidYouKnowWindow::loadFile(const int num)
         mBrowserBox->addRow(lines[i]);
 }
 
-void DidYouKnowWindow::setVisible(bool visible)
+void DidYouKnowWindow::setVisible(Visible visible)
 {
     Window::setVisible(visible);
 
-    if (visible || isWindowVisible())
+    if (visible == Visible_true || isWindowVisible())
         loadData();
 }
diff --git a/src/gui/windows/didyouknowwindow.h b/src/gui/windows/didyouknowwindow.h
index 9d84a8256..4de462e97 100644
--- a/src/gui/windows/didyouknowwindow.h
+++ b/src/gui/windows/didyouknowwindow.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWS_DIDYOUKNOWWINDOW_H
 #define GUI_WINDOWS_DIDYOUKNOWWINDOW_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/linkhandler.h"
 #include "gui/widgets/window.h"
 
@@ -63,7 +65,7 @@ class DidYouKnowWindow final : public Window,
 
         void loadData(int num = 0);
 
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
     private:
         void loadFile(const int num);
diff --git a/src/gui/windows/editdialog.cpp b/src/gui/windows/editdialog.cpp
index 81710f06b..b18b5f23d 100644
--- a/src/gui/windows/editdialog.cpp
+++ b/src/gui/windows/editdialog.cpp
@@ -64,7 +64,7 @@ void EditDialog::postInit()
     add(okButton);
 
     center();
-    setVisible(true);
+    setVisible(Visible_true);
     okButton->requestFocus();
 }
 
diff --git a/src/gui/windows/editserverdialog.cpp b/src/gui/windows/editserverdialog.cpp
index 5f22a5389..0d1ed392f 100644
--- a/src/gui/windows/editserverdialog.cpp
+++ b/src/gui/windows/editserverdialog.cpp
@@ -190,7 +190,7 @@ EditServerDialog::~EditServerDialog()
 void EditServerDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
     mNameField->requestFocus();
 }
 
diff --git a/src/gui/windows/emotewindow.cpp b/src/gui/windows/emotewindow.cpp
index 2ab84819a..1734333e0 100644
--- a/src/gui/windows/emotewindow.cpp
+++ b/src/gui/windows/emotewindow.cpp
@@ -145,12 +145,12 @@ EmoteWindow::~EmoteWindow()
 
 void EmoteWindow::show()
 {
-    setVisible(true);
+    setVisible(Visible_true);
 }
 
 void EmoteWindow::hide()
 {
-    setVisible(false);
+    setVisible(Visible_false);
 }
 
 std::string EmoteWindow::getSelectedEmote() const
@@ -170,7 +170,7 @@ void EmoteWindow::clearEmote()
     const int index = mEmotePage->getSelectedIndex();
     mEmotePage->resetAction();
     if (index >= 0)
-        setVisible(false);
+        setVisible(Visible_false);
 }
 
 std::string EmoteWindow::getSelectedColor() const
@@ -188,7 +188,7 @@ std::string EmoteWindow::getSelectedColor() const
 void EmoteWindow::clearColor()
 {
     mColorPage->resetAction();
-    setVisible(false);
+    setVisible(Visible_false);
 }
 
 std::string EmoteWindow::getSelectedFont() const
@@ -206,7 +206,7 @@ std::string EmoteWindow::getSelectedFont() const
 void EmoteWindow::clearFont()
 {
     mFontPage->setSelected(-1);
-    setVisible(false);
+    setVisible(Visible_false);
 }
 
 void EmoteWindow::addListeners(ActionListener *const listener)
diff --git a/src/gui/windows/equipmentwindow.cpp b/src/gui/windows/equipmentwindow.cpp
index d569c3cc2..a847c3fff 100644
--- a/src/gui/windows/equipmentwindow.cpp
+++ b/src/gui/windows/equipmentwindow.cpp
@@ -389,9 +389,9 @@ void EquipmentWindow::action(const ActionEvent &event)
 void EquipmentWindow::updatePage()
 {
     EquipmentPage *const page = mPages[mSelectedTab];
-    const bool visible = page->showPlayerBox;
+    const Visible visible = fromBool(page->showPlayerBox, Visible);
     mPlayerBox->setVisible(visible);
-    if (visible)
+    if (visible == Visible_true)
     {
         mPlayerBox->setDimension(Rect(page->x, page->y,
             page->width, page->height));
@@ -474,7 +474,7 @@ void EquipmentWindow::mousePressed(MouseEvent& event)
         if (Item *const item = getItem(x, y))
         {
             if (itemPopup)
-                itemPopup->setVisible(false);
+                itemPopup->setVisible(Visible_false);
 
             /* Convert relative to the window coordinates to absolute screen
              * coordinates.
@@ -575,7 +575,7 @@ void EquipmentWindow::mouseMoved(MouseEvent &event)
     }
     else
     {
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
     }
 }
 
@@ -583,7 +583,7 @@ void EquipmentWindow::mouseMoved(MouseEvent &event)
 void EquipmentWindow::mouseExited(MouseEvent &event A_UNUSED)
 {
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
 }
 
 void EquipmentWindow::setSelected(const int index)
@@ -593,7 +593,7 @@ void EquipmentWindow::setSelected(const int index)
     if (mUnequip)
         mUnequip->setEnabled(mSelected != -1);
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
 }
 
 void EquipmentWindow::setBeing(Being *const being)
diff --git a/src/gui/windows/helpwindow.cpp b/src/gui/windows/helpwindow.cpp
index 2a5c7b943..0d65582a9 100644
--- a/src/gui/windows/helpwindow.cpp
+++ b/src/gui/windows/helpwindow.cpp
@@ -124,7 +124,7 @@ void HelpWindow::loadHelp(const std::string &helpFile)
     loadFile(helpFile);
     loadFile("footer");
     mScrollArea->setVerticalScrollAmount(0);
-    setVisible(true);
+    setVisible(Visible_true);
 }
 
 void HelpWindow::loadFile(std::string file)
@@ -189,7 +189,7 @@ void HelpWindow::search(const std::string &text0)
             }
             loadFile("footer");
             mScrollArea->setVerticalScrollAmount(0);
-            setVisible(true);
+            setVisible(Visible_true);
         }
     }
 }
diff --git a/src/gui/windows/inventorywindow.cpp b/src/gui/windows/inventorywindow.cpp
index 11ca2e359..6094ffc91 100644
--- a/src/gui/windows/inventorywindow.cpp
+++ b/src/gui/windows/inventorywindow.cpp
@@ -348,7 +348,7 @@ void InventoryWindow::postInit()
     mItems->setSortType(mSortDropDown->getSelected());
     widgetResized(Event(nullptr));
     if (mInventory && mInventory->getType() == InventoryType::STORAGE)
-        setVisible(true);
+        setVisible(Visible_true);
 }
 
 InventoryWindow::~InventoryWindow()
@@ -541,7 +541,7 @@ void InventoryWindow::widgetHidden(const Event &event)
 {
     Window::widgetHidden(event);
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
 }
 
 void InventoryWindow::mouseClicked(MouseEvent &event)
@@ -788,7 +788,7 @@ void InventoryWindow::updateButtons(const Item *item)
     }
 }
 
-void InventoryWindow::setSplitAllowed(const bool allowed)
+void InventoryWindow::setSplitAllowed(const Visible allowed)
 {
     if (mSplitButton)
         mSplitButton->setVisible(allowed);
@@ -808,7 +808,7 @@ void InventoryWindow::close()
 #ifdef EATHENA_SUPPORT
         case InventoryType::CART:
 #endif
-            setVisible(false);
+            setVisible(Visible_false);
             break;
 
         case InventoryType::STORAGE:
@@ -973,7 +973,7 @@ void InventoryWindow::widgetResized(const Event &event)
     {
         if (!mCompactMode)
         {
-            mNameFilter->setVisible(false);
+            mNameFilter->setVisible(Visible_false);
             mNameFilterCell->setType(LayoutCell::NONE);
             mFilterCell->setWidth(mFilterCell->getWidth() + 3);
             mCompactMode = true;
@@ -981,16 +981,16 @@ void InventoryWindow::widgetResized(const Event &event)
     }
     else if (mCompactMode)
     {
-        mNameFilter->setVisible(true);
+        mNameFilter->setVisible(Visible_true);
         mNameFilterCell->setType(LayoutCell::WIDGET);
         mFilterCell->setWidth(mFilterCell->getWidth() - 3);
         mCompactMode = false;
     }
 }
 
-void InventoryWindow::setVisible(bool visible)
+void InventoryWindow::setVisible(Visible visible)
 {
-    if (!visible)
+    if (visible == Visible_false)
         mSortDropDown->hideDrop();
     Window::setVisible(visible);
 }
diff --git a/src/gui/windows/inventorywindow.h b/src/gui/windows/inventorywindow.h
index 209e9c171..eb82b0fb5 100644
--- a/src/gui/windows/inventorywindow.h
+++ b/src/gui/windows/inventorywindow.h
@@ -25,6 +25,8 @@
 
 #include "inventory.h"
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
@@ -122,7 +124,7 @@ class InventoryWindow final : public Window,
         /**
          * Sets whether the split button should be shown.
          */
-        void setSplitAllowed(const bool allowed);
+        void setSplitAllowed(const Visible allowed);
 
         /**
          * Closes the Storage Window, as well as telling the server that the
@@ -153,7 +155,7 @@ class InventoryWindow final : public Window,
 
         void mouseExited(MouseEvent &event) override final;
 
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         void unsetInventory();
 
diff --git a/src/gui/windows/itemamountwindow.cpp b/src/gui/windows/itemamountwindow.cpp
index 6b547c46b..61e48ab5f 100644
--- a/src/gui/windows/itemamountwindow.cpp
+++ b/src/gui/windows/itemamountwindow.cpp
@@ -285,7 +285,7 @@ ItemAmountWindow::ItemAmountWindow(const Usage usage, Window *const parent,
 void ItemAmountWindow::postInit()
 {
     Window::postInit();
-    setVisible(mItem);
+    setVisible(fromBool(mItem, Visible));
 }
 
 ItemAmountWindow::~ItemAmountWindow()
@@ -311,7 +311,7 @@ void ItemAmountWindow::mouseMoved(MouseEvent &event)
 void ItemAmountWindow::mouseExited(MouseEvent &event A_UNUSED)
 {
     if (itemPopup)
-        itemPopup->setVisible(false);
+        itemPopup->setVisible(Visible_false);
 }
 
 void ItemAmountWindow::resetAmount()
diff --git a/src/gui/windows/logindialog.cpp b/src/gui/windows/logindialog.cpp
index 47b2ae447..644c9f2ad 100644
--- a/src/gui/windows/logindialog.cpp
+++ b/src/gui/windows/logindialog.cpp
@@ -132,7 +132,7 @@ LoginDialog::LoginDialog(LoginData *const data,
         | UpdateType::Custom) ^ UpdateType::Custom);
 
     if (!mCustomUpdateHost->isSelected())
-        mUpdateHostText->setVisible(false);
+        mUpdateHostText->setVisible(Visible_false);
 
     mUserField->setActionEventId("login");
     mPassField->setActionEventId("login");
@@ -170,7 +170,7 @@ LoginDialog::LoginDialog(LoginData *const data,
 void LoginDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
 
     const int h = 200;
     if (mUpdateHostLabel)
@@ -234,12 +234,13 @@ void LoginDialog::action(const ActionEvent &event)
     }
     else if (eventId == "customhost")
     {
-        mUpdateHostText->setVisible(mCustomUpdateHost->isSelected());
+        mUpdateHostText->setVisible(fromBool(
+            mCustomUpdateHost->isSelected(), Visible));
     }
     else if (eventId == "updateselect")
     {
         mCustomUpdateHost->setSelected(false);
-        mUpdateHostText->setVisible(false);
+        mUpdateHostText->setVisible(Visible_false);
     }
 }
 
diff --git a/src/gui/windows/maileditwindow.cpp b/src/gui/windows/maileditwindow.cpp
index f7ea62b22..74b214eb2 100644
--- a/src/gui/windows/maileditwindow.cpp
+++ b/src/gui/windows/maileditwindow.cpp
@@ -77,7 +77,7 @@ MailEditWindow::MailEditWindow() :
     setCloseButton(true);
     setSaveVisible(false);
     setStickyButtonLock(true);
-    setVisible(true);
+    setVisible(Visible_true);
 
     setDefaultSize(380, 200, ImageRect::CENTER);
     setMinWidth(200);
diff --git a/src/gui/windows/mailviewwindow.cpp b/src/gui/windows/mailviewwindow.cpp
index 023ea925a..5aed6d5e2 100644
--- a/src/gui/windows/mailviewwindow.cpp
+++ b/src/gui/windows/mailviewwindow.cpp
@@ -82,7 +82,7 @@ MailViewWindow::MailViewWindow(const MailMessage *const message) :
     setResizable(true);
     setSaveVisible(false);
     setStickyButtonLock(true);
-    setVisible(true);
+    setVisible(Visible_true);
 
     setDefaultSize(380, 230, ImageRect::CENTER);
     setMinWidth(200);
diff --git a/src/gui/windows/minimap.cpp b/src/gui/windows/minimap.cpp
index 6b2a8547a..279b3e840 100644
--- a/src/gui/windows/minimap.cpp
+++ b/src/gui/windows/minimap.cpp
@@ -83,7 +83,7 @@ Minimap::Minimap() :
     setSticky(false);
 
     loadWindowState();
-    setVisible(mShow, isSticky());
+    setVisible(fromBool(mShow, Visible), isSticky());
     enableVisibleSound(true);
 }
 
@@ -134,7 +134,7 @@ void Minimap::setMap(const Map *const map)
             if (!surface)
             {
                 if (!isSticky())
-                    setVisible(false);
+                    setVisible(Visible_false);
                 BLOCK_END("Minimap::setMap")
                 return;
             }
@@ -145,7 +145,7 @@ void Minimap::setMap(const Map *const map)
             if (!data)
             {
                 if (!isSticky())
-                    setVisible(false);
+                    setVisible(Visible_false);
                 BLOCK_END("Minimap::setMap")
                 return;
             }
@@ -218,19 +218,19 @@ void Minimap::setMap(const Map *const map)
         resetToDefaultSize();
 
         if (mShow)
-            setVisible(true);
+            setVisible(Visible_true);
     }
     else
     {
         if (!isSticky())
-            setVisible(false);
+            setVisible(Visible_false);
     }
     BLOCK_END("Minimap::setMap")
 }
 
 void Minimap::toggle()
 {
-    setVisible(!isWindowVisible(), isSticky());
+    setVisible(fromBool(!isWindowVisible(), Visible), isSticky());
     mShow = isWindowVisible();
 }
 
diff --git a/src/gui/windows/ministatuswindow.cpp b/src/gui/windows/ministatuswindow.cpp
index b7e8e6430..80adb129c 100644
--- a/src/gui/windows/ministatuswindow.cpp
+++ b/src/gui/windows/ministatuswindow.cpp
@@ -138,7 +138,7 @@ MiniStatusWindow::MiniStatusWindow() :
     loadBars();
     updateBars();
 
-    setVisible(true);
+    setVisible(Visible_true);
     addMouseListener(this);
     Inventory *const inv = PlayerInfo::getInventory();
     if (inv)
@@ -468,7 +468,8 @@ void MiniStatusWindow::mouseExited(MouseEvent &event)
     mStatusPopup->hide();
 }
 
-void MiniStatusWindow::showBar(const std::string &name, const bool visible)
+void MiniStatusWindow::showBar(const std::string &name,
+                               const Visible visible)
 {
     ProgressBar *const bar = mBarNames[name];
     if (!bar)
@@ -483,17 +484,17 @@ void MiniStatusWindow::loadBars()
     if (!config.getIntValue("ministatussaved"))
     {
         if (mWeightBar)
-            mWeightBar->setVisible(false);
+            mWeightBar->setVisible(Visible_false);
         if (mInvSlotsBar)
-            mInvSlotsBar->setVisible(false);
+            mInvSlotsBar->setVisible(Visible_false);
         if (mMoneyBar)
-            mMoneyBar->setVisible(false);
+            mMoneyBar->setVisible(Visible_false);
         if (mArrowsBar)
-            mArrowsBar->setVisible(false);
+            mArrowsBar->setVisible(Visible_false);
         if (mStatusBar)
-            mStatusBar->setVisible(false);
+            mStatusBar->setVisible(Visible_false);
         if (mJobBar)
-            mJobBar->setVisible(true);
+            mJobBar->setVisible(Visible_true);
         return;
     }
 
@@ -506,7 +507,7 @@ void MiniStatusWindow::loadBars()
         ProgressBar *const bar = mBarNames[str];
         if (!bar)
             continue;
-        bar->setVisible(false);
+        bar->setVisible(Visible_false);
     }
 }
 
diff --git a/src/gui/windows/ministatuswindow.h b/src/gui/windows/ministatuswindow.h
index 8d46fbdf9..d31783b63 100644
--- a/src/gui/windows/ministatuswindow.h
+++ b/src/gui/windows/ministatuswindow.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWS_MINISTATUSWINDOW_H
 #define GUI_WINDOWS_MINISTATUSWINDOW_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "listeners/arrowslistener.h"
 #include "listeners/attributelistener.h"
 #include "listeners/inventorylistener.h"
@@ -79,7 +81,7 @@ class MiniStatusWindow final : public Window,
 
         void mouseExited(MouseEvent &event) override final;
 
-        void showBar(const std::string &name, const bool visible);
+        void showBar(const std::string &name, const Visible visible);
 
         void updateBars();
 
diff --git a/src/gui/windows/npcdialog.cpp b/src/gui/windows/npcdialog.cpp
index 83a6e42b1..2c7c27f57 100644
--- a/src/gui/windows/npcdialog.cpp
+++ b/src/gui/windows/npcdialog.cpp
@@ -171,9 +171,9 @@ NpcDialog::NpcDialog(const int npcId) :
     setContentSize(260, 175);
     mListScrollArea->setHorizontalScrollPolicy(ScrollArea::SHOW_NEVER);
     mItemScrollArea->setHorizontalScrollPolicy(ScrollArea::SHOW_NEVER);
-    mItemList->setVisible(true);
-    mTextField->setVisible(true);
-    mIntField->setVisible(true);
+    mItemList->setVisible(Visible_true);
+    mTextField->setVisible(Visible_true);
+    mIntField->setVisible(Visible_true);
 
     const Font *const fnt = mButton->getFont();
     int width = std::max(fnt->getWidth(CAPTION_WAITING),
@@ -194,7 +194,7 @@ NpcDialog::NpcDialog(const int npcId) :
 void NpcDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
     requestFocus();
     enableVisibleSound(true);
     soundManager.playGuiSound(SOUND_SHOW_WINDOW);
@@ -646,11 +646,11 @@ void NpcDialog::move(const int amount)
     }
 }
 
-void NpcDialog::setVisible(bool visible)
+void NpcDialog::setVisible(Visible visible)
 {
     Window::setVisible(visible);
 
-    if (!visible)
+    if (visible == Visible_false)
         scheduleDelete();
 }
 
diff --git a/src/gui/windows/npcdialog.h b/src/gui/windows/npcdialog.h
index c74721b87..0ed4096e8 100644
--- a/src/gui/windows/npcdialog.h
+++ b/src/gui/windows/npcdialog.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWS_NPCDIALOG_H
 #define GUI_WINDOWS_NPCDIALOG_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/models/extendedlistmodel.h"
 
 #include "gui/widgets/window.h"
@@ -162,7 +164,7 @@ class NpcDialog final : public Window,
 
         void move(const int amount);
 
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         void optionChanged(const std::string &name) override final;
 
diff --git a/src/gui/windows/okdialog.cpp b/src/gui/windows/okdialog.cpp
index 1a6c0c3c8..cdd73acc6 100644
--- a/src/gui/windows/okdialog.cpp
+++ b/src/gui/windows/okdialog.cpp
@@ -78,7 +78,7 @@ OkDialog::OkDialog(const std::string &restrict title,
     else
         centerHorisontally();
     // +++ virtual method call
-    setVisible(true);
+    setVisible(Visible_true);
     okButton->requestFocus();
 
     if (soundEvent == DialogType::OK)
diff --git a/src/gui/windows/questswindow.cpp b/src/gui/windows/questswindow.cpp
index 3a7fd8acc..9279220ac 100644
--- a/src/gui/windows/questswindow.cpp
+++ b/src/gui/windows/questswindow.cpp
@@ -272,7 +272,7 @@ void QuestsWindow::action(const ActionEvent &event)
     }
     else if (eventId == "close")
     {
-        setVisible(false);
+        setVisible(Visible_false);
     }
 }
 
diff --git a/src/gui/windows/quitdialog.cpp b/src/gui/windows/quitdialog.cpp
index 8af4db969..c605b7796 100644
--- a/src/gui/windows/quitdialog.cpp
+++ b/src/gui/windows/quitdialog.cpp
@@ -122,7 +122,7 @@ void QuitDialog::postInit()
 {
     Window::postInit();
     setLocationRelativeTo(getParent());
-    setVisible(true);
+    setVisible(Visible_true);
     soundManager.playGuiSound(SOUND_SHOW_WINDOW);
     requestModalFocus();
     mOkButton->requestFocus();
diff --git a/src/gui/windows/registerdialog.cpp b/src/gui/windows/registerdialog.cpp
index 021ebb938..14a7d61f5 100644
--- a/src/gui/windows/registerdialog.cpp
+++ b/src/gui/windows/registerdialog.cpp
@@ -148,7 +148,7 @@ RegisterDialog::RegisterDialog(LoginData *const data) :
 void RegisterDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
     mUserField->requestFocus();
     mUserField->setCaretPosition(static_cast<unsigned>(
                                  mUserField->getText().length()));
diff --git a/src/gui/windows/serverdialog.cpp b/src/gui/windows/serverdialog.cpp
index 30b1f312d..4dc0d5fc0 100644
--- a/src/gui/windows/serverdialog.cpp
+++ b/src/gui/windows/serverdialog.cpp
@@ -193,7 +193,7 @@ ServerDialog::ServerDialog(ServerInfo *const serverInfo,
 void ServerDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
 
     mConnectButton->requestFocus();
 
diff --git a/src/gui/windows/setupwindow.cpp b/src/gui/windows/setupwindow.cpp
index f5832320f..8dabbc36f 100644
--- a/src/gui/windows/setupwindow.cpp
+++ b/src/gui/windows/setupwindow.cpp
@@ -174,7 +174,7 @@ void SetupWindow::action(const ActionEvent &event)
 
     if (eventId == "Apply")
     {
-        setVisible(false);
+        setVisible(Visible_false);
         for_each(mTabs.begin(), mTabs.end(), std::mem_fun(&SetupTab::apply));
     }
     else if (eventId == "Cancel")
@@ -274,14 +274,14 @@ void SetupWindow::hideWindows()
     {
         Window *const window = *it;
         if (window && !window->isSticky())
-            window->setVisible(false);
+            window->setVisible(Visible_false);
     }
-    setVisible(false);
+    setVisible(Visible_false);
 }
 
 void SetupWindow::doCancel()
 {
-    setVisible(false);
+    setVisible(Visible_false);
     for_each(mTabs.begin(), mTabs.end(), std::mem_fun(&SetupTab::cancel));
 }
 
@@ -291,9 +291,9 @@ void SetupWindow::activateTab(const std::string &name)
     mPanel->setSelectedTabByName(tmp);
 }
 
-void SetupWindow::setVisible(bool visible)
+void SetupWindow::setVisible(Visible visible)
 {
-    touchManager.setTempHide(visible);
+    touchManager.setTempHide(visible == Visible_true);
     Window::setVisible(visible);
 }
 
diff --git a/src/gui/windows/setupwindow.h b/src/gui/windows/setupwindow.h
index a21341cec..de274281f 100644
--- a/src/gui/windows/setupwindow.h
+++ b/src/gui/windows/setupwindow.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWS_SETUPWINDOW_H
 #define GUI_WINDOWS_SETUPWINDOW_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
@@ -71,7 +73,7 @@ class SetupWindow final : public Window,
 
         void activateTab(const std::string &name);
 
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         void widgetResized(const Event &event) override final;
 
diff --git a/src/gui/windows/shopwindow.cpp b/src/gui/windows/shopwindow.cpp
index b173da568..ae5de90a1 100644
--- a/src/gui/windows/shopwindow.cpp
+++ b/src/gui/windows/shopwindow.cpp
@@ -224,7 +224,7 @@ ShopWindow::ShopWindow() :
 void ShopWindow::postInit()
 {
     Window::postInit();
-    setVisible(false);
+    setVisible(Visible_false);
     enableVisibleSound(true);
     updateSelection();
 }
@@ -469,7 +469,7 @@ void ShopWindow::updateButtonsAndLabels()
         mRenameButton->setEnabled(!mEnableVending);
 }
 
-void ShopWindow::setVisible(bool visible)
+void ShopWindow::setVisible(Visible visible)
 {
     Window::setVisible(visible);
 }
diff --git a/src/gui/windows/shopwindow.h b/src/gui/windows/shopwindow.h
index 09b7da951..9a2074cf2 100644
--- a/src/gui/windows/shopwindow.h
+++ b/src/gui/windows/shopwindow.h
@@ -23,6 +23,8 @@
 #ifndef GUI_WINDOWS_SHOPWINDOW_H
 #define GUI_WINDOWS_SHOPWINDOW_H
 
+#include "enums/simpletypes/visible.h"
+
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
@@ -97,7 +99,7 @@ class ShopWindow final : public Window,
         /**
          * Sets the visibility of this window.
          */
-        void setVisible(bool visible) override final;
+        void setVisible(Visible visible) override final;
 
         /**
          * Returns true if any instances exist.
diff --git a/src/gui/windows/skilldialog.cpp b/src/gui/windows/skilldialog.cpp
index 22f673a13..6617c200c 100644
--- a/src/gui/windows/skilldialog.cpp
+++ b/src/gui/windows/skilldialog.cpp
@@ -165,7 +165,7 @@ void SkillDialog::action(const ActionEvent &event)
     }
     else if (eventId == "close")
     {
-        setVisible(false);
+        setVisible(Visible_false);
     }
 }
 
@@ -242,8 +242,8 @@ void SkillDialog::hideSkills(const SkillOwner::Type owner)
         if (info && info->owner == owner)
         {
             PlayerInfo::setSkillLevel(info->id, 0);
-            if (!info->alwaysVisible)
-                info->visible = false;
+            if (info->alwaysVisible == Visible_false)
+                info->visible = Visible_false;
         }
     }
 }
@@ -324,8 +324,8 @@ void SkillDialog::loadXmlFile(const std::string &fileName)
                             node, "owner", "player"));
                         skill->errorText = XML::getProperty(
                             node, "errorText", name);
-                        skill->alwaysVisible = XML::getBoolProperty(
-                            node, "alwaysVisible", false);
+                        skill->alwaysVisible = fromBool(XML::getBoolProperty(
+                            node, "alwaysVisible", false), Visible);
                         skill->castingSrcEffectId = XML::getProperty(
                             node, "castingSrcEffectId", -1);
                         skill->castingDstEffectId = XML::getProperty(
@@ -336,7 +336,7 @@ void SkillDialog::loadXmlFile(const std::string &fileName)
                     }
 
                     std::string icon = XML::getProperty(node, "icon", "");
-                    const int level = skill->alwaysVisible
+                    const int level = (skill->alwaysVisible == Visible_true)
                         ? 0 : XML::getProperty(node, "level", 0);
                     SkillData *data = skill->getData(level);
                     if (!data)
@@ -414,8 +414,8 @@ void SkillDialog::removeSkill(const int id)
             info->level = 0;
             info->update();
             PlayerInfo::setSkillLevel(id, 0);
-            if (!info->alwaysVisible)
-                info->visible = false;
+            if (info->alwaysVisible == Visible_false)
+                info->visible = Visible_false;
         }
     }
 }
@@ -474,8 +474,8 @@ void SkillDialog::addSkill(const SkillOwner::Type owner,
         data->setIcon("");
         data->shortName = toString(skill->id);
         skill->modifiable = modifiable;
-        skill->visible = false;
-        skill->alwaysVisible = false;
+        skill->visible = Visible_false;
+        skill->alwaysVisible = Visible_false;
         skill->model = mDefaultModel;
         skill->level = level;
         // TRANSLATORS: skills dialog. skill level
diff --git a/src/gui/windows/socialwindow.cpp b/src/gui/windows/socialwindow.cpp
index 4f453e576..5889041e7 100644
--- a/src/gui/windows/socialwindow.cpp
+++ b/src/gui/windows/socialwindow.cpp
@@ -97,7 +97,7 @@ void SocialWindow::postInit()
 {
     Window::postInit();
     setWindowName("Social");
-    setVisible(false);
+    setVisible(Visible_false);
     setSaveVisible(true);
     setResizable(true);
     setSaveVisible(true);
diff --git a/src/gui/windows/textcommandeditor.cpp b/src/gui/windows/textcommandeditor.cpp
index 3051d4cc6..fdffe0e75 100644
--- a/src/gui/windows/textcommandeditor.cpp
+++ b/src/gui/windows/textcommandeditor.cpp
@@ -129,9 +129,9 @@ TextCommandEditor::TextCommandEditor(TextCommand *const command) :
     mDeleteButton->adjustSize();
 
     if (command->getCommandType() == TEXT_COMMAND_MAGIC)
-        showControls(true);
+        showControls(Visible_true);
     else
-        showControls(false);
+        showControls(Visible_false);
 
     mSymbolTextField->setText(command->getSymbol());
     mCommandTextField->setText(command->getCommand());
@@ -188,7 +188,7 @@ void TextCommandEditor::postInit()
 {
     Window::postInit();
     enableVisibleSound(true);
-    setVisible(true);
+    setVisible(Visible_true);
 }
 
 TextCommandEditor::~TextCommandEditor()
@@ -204,12 +204,12 @@ void TextCommandEditor::action(const ActionEvent &event)
     if (eventId == "magic")
     {
         mIsMagicCommand = true;
-        showControls(true);
+        showControls(Visible_true);
     }
     else if (eventId == "other")
     {
         mIsMagicCommand = false;
-        showControls(false);
+        showControls(Visible_false);
     }
     else if (eventId == "save")
     {
@@ -227,7 +227,7 @@ void TextCommandEditor::action(const ActionEvent &event)
     }
 }
 
-void TextCommandEditor::showControls(const bool show)
+void TextCommandEditor::showControls(const Visible show)
 {
     mManaField->setVisible(show);
     mManaLabel->setVisible(show);
diff --git a/src/gui/windows/textcommandeditor.h b/src/gui/windows/textcommandeditor.h
index 7ee183f30..604971419 100644
--- a/src/gui/windows/textcommandeditor.h
+++ b/src/gui/windows/textcommandeditor.h
@@ -61,7 +61,7 @@ class TextCommandEditor final : public Window,
         void scheduleDelete() override final;
 
     private:
-        void showControls(const bool show);
+        void showControls(const Visible show);
 
         void save();
 
diff --git a/src/gui/windows/textdialog.cpp b/src/gui/windows/textdialog.cpp
index a3e9bcc4b..642d574cc 100644
--- a/src/gui/windows/textdialog.cpp
+++ b/src/gui/windows/textdialog.cpp
@@ -90,7 +90,7 @@ void TextDialog::postInit()
         setLocationRelativeTo(getParent());
         getParent()->moveToTop(this);
     }
-    setVisible(true);
+    setVisible(Visible_true);
     requestModalFocus();
     if (mPasswordField)
         mPasswordField->requestFocus();
diff --git a/src/gui/windows/tradewindow.cpp b/src/gui/windows/tradewindow.cpp
index dfa5b1339..6c48127c5 100644
--- a/src/gui/windows/tradewindow.cpp
+++ b/src/gui/windows/tradewindow.cpp
@@ -372,7 +372,7 @@ void TradeWindow::action(const ActionEvent &event)
 
         if (!inventoryWindow->isWindowVisible())
         {
-            inventoryWindow->setVisible(true);
+            inventoryWindow->setVisible(Visible_true);
             return;
         }
 
@@ -392,7 +392,7 @@ void TradeWindow::action(const ActionEvent &event)
     }
     else if (eventId == "cancel")
     {
-        setVisible(false);
+        setVisible(Visible_false);
         reset();
         PlayerInfo::setTrading(Trading_false);
         tradeHandler->cancel();
diff --git a/src/gui/windows/unregisterdialog.cpp b/src/gui/windows/unregisterdialog.cpp
index c8ec421a5..5e8df8298 100644
--- a/src/gui/windows/unregisterdialog.cpp
+++ b/src/gui/windows/unregisterdialog.cpp
@@ -91,7 +91,7 @@ void UnRegisterDialog::postInit()
     add(mCancelButton);
 
     center();
-    setVisible(true);
+    setVisible(Visible_true);
     mPasswordField->requestFocus();
     mPasswordField->setActionEventId("cancel");
 }
diff --git a/src/gui/windows/updaterwindow.cpp b/src/gui/windows/updaterwindow.cpp
index ffa2aa123..48a3b4ebe 100644
--- a/src/gui/windows/updaterwindow.cpp
+++ b/src/gui/windows/updaterwindow.cpp
@@ -250,7 +250,7 @@ UpdaterWindow::UpdaterWindow(const std::string &restrict updateHost,
 void UpdaterWindow::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
     mCancelButton->requestFocus();
     removeProtocol(mUpdateServerPath);
 
diff --git a/src/gui/windows/whoisonline.cpp b/src/gui/windows/whoisonline.cpp
index fe455c4fd..d0b896041 100644
--- a/src/gui/windows/whoisonline.cpp
+++ b/src/gui/windows/whoisonline.cpp
@@ -130,7 +130,7 @@ void WhoIsOnline::postInit()
     const int w = 200;
     setDefaultSize(w, h, ImageRect::CENTER);
 
-    setVisible(false);
+    setVisible(Visible_false);
     setCloseButton(true);
     setResizable(true);
     setStickyButtonLock(true);
diff --git a/src/gui/windows/worldselectdialog.cpp b/src/gui/windows/worldselectdialog.cpp
index a592f24ef..73c1a4f4e 100644
--- a/src/gui/windows/worldselectdialog.cpp
+++ b/src/gui/windows/worldselectdialog.cpp
@@ -89,7 +89,7 @@ WorldSelectDialog::WorldSelectDialog(Worlds worlds) :
 void WorldSelectDialog::postInit()
 {
     Window::postInit();
-    setVisible(true);
+    setVisible(Visible_true);
     mChooseWorld->requestFocus();
 }