Add missing checks.

11 files changed, 56 insertions, 23 deletions

diff --git a/src/gui/viewport.cpp b/src/gui/viewport.cpp
index 1a8231780..e0d5d217f 100644
--- a/src/gui/viewport.cpp
+++ b/src/gui/viewport.cpp
@@ -491,13 +491,16 @@ bool Viewport::leftMouseAction()
     }
     else if (stopAttack)
     {
-        const int mouseTileX = (mMouseX + mPixelViewX)
-            / mMap->getTileWidth();
-        const int mouseTileY = (mMouseY + mPixelViewY)
-            / mMap->getTileHeight();
-        inputManager.executeChatCommand(InputAction::PET_MOVE,
-            strprintf("%d %d", mouseTileX, mouseTileY),
-            nullptr);
+        if (mMap)
+        {
+            const int mouseTileX = (mMouseX + mPixelViewX)
+                / mMap->getTileWidth();
+            const int mouseTileY = (mMouseY + mPixelViewY)
+                / mMap->getTileHeight();
+            inputManager.executeChatCommand(InputAction::PET_MOVE,
+                strprintf("%d %d", mouseTileX, mouseTileY),
+                nullptr);
+        }
         return true;
     }
     // Just walk around
@@ -587,6 +590,8 @@ void Viewport::getMouseTile(int &destX, int &destY)
 void Viewport::getMouseTile(const int x, const int y,
                             int &destX, int &destY) const
 {
+    if (!mMap)
+        return;
     const int tw = mMap->getTileWidth();
     const int th = mMap->getTileHeight();
     destX = CAST_S32(x + mPixelViewX)
diff --git a/src/gui/widgets/characterdisplay.cpp b/src/gui/widgets/characterdisplay.cpp
index 7aed3469c..560e1cb54 100644
--- a/src/gui/widgets/characterdisplay.cpp
+++ b/src/gui/widgets/characterdisplay.cpp
@@ -121,7 +121,7 @@ void CharacterDisplay::mouseExited(MouseEvent &event A_UNUSED)
 
 void CharacterDisplay::mouseMoved(MouseEvent &event A_UNUSED)
 {
-    if (!gui || !textPopup)
+    if (!gui || !textPopup || !mCharacter)
         return;
 
     int mouseX = 0;
diff --git a/src/gui/widgets/layoutcell.cpp b/src/gui/widgets/layoutcell.cpp
index 2ab016ca4..1e46c1ca7 100644
--- a/src/gui/widgets/layoutcell.cpp
+++ b/src/gui/widgets/layoutcell.cpp
@@ -43,7 +43,11 @@ LayoutArray &LayoutCell::getArray()
     if (mType == WIDGET)
         return tempArray;
     if (mType == ARRAY)
+    {
+        if (!mArray)
+            return tempArray;
         return *mArray;
+    }
 
     mArray = new LayoutArray;
     mType = ARRAY;
diff --git a/src/gui/widgets/selldialog.cpp b/src/gui/widgets/selldialog.cpp
index 189babc89..17664ed78 100644
--- a/src/gui/widgets/selldialog.cpp
+++ b/src/gui/widgets/selldialog.cpp
@@ -199,7 +199,8 @@ SellDialog::~SellDialog()
 void SellDialog::reset()
 {
     mShopItems->clear();
-    mSlider->setValue(0);
+    if (mSlider)
+        mSlider->setValue(0);
     mShopItemList->setSelected(-1);
     updateButtonsAndLabels();
 }
@@ -256,8 +257,11 @@ void SellDialog::action(const ActionEvent &event)
 
     if (eventId == "slider")
     {
-        mAmountItems = CAST_S32(mSlider->getValue());
-        updateButtonsAndLabels();
+        if (mSlider)
+        {
+            mAmountItems = CAST_S32(mSlider->getValue());
+            updateButtonsAndLabels();
+        }
     }
     else if (eventId == "inc" && mSlider && mAmountItems < mMaxItems)
     {
diff --git a/src/gui/widgets/setupitem.cpp b/src/gui/widgets/setupitem.cpp
index be9f2000f..511ab90ab 100644
--- a/src/gui/widgets/setupitem.cpp
+++ b/src/gui/widgets/setupitem.cpp
@@ -406,7 +406,7 @@ void SetupItemTextField::action(const ActionEvent &event)
         return;
 
     const std::string &eventId = event.getId();
-    if (eventId == mWidget->getActionEventId())
+    if (mWidget && eventId == mWidget->getActionEventId())
     {
         fromWidget();
     }
@@ -544,7 +544,7 @@ void SetupItemIntTextField::action(const ActionEvent &event)
         return;
 
     const std::string &eventId = event.getId();
-    if (eventId == mWidget->getActionEventId())
+    if (mWidget && eventId == mWidget->getActionEventId())
     {
         fromWidget();
     }
@@ -1153,14 +1153,15 @@ void SetupItemSound::addMoreControls()
 {
     mButton = new Button(this, BUTTON_PLAY, 16, 16,
         mEventName + "_PLAY", this);
-    mHorizont->add(mButton);
+    if (mHorizont)
+        mHorizont->add(mButton);
 }
 
 void SetupItemSound::action(const ActionEvent &event)
 {
     if (event.getId() == mEventName + "_PLAY")
     {
-        if (mSlider->getSelected())
+        if (mSlider && mSlider->getSelected())
         {
             soundManager.playGuiSfx(branding.getStringValue("systemsounds")
                 .append(mSlider->getSelectedString()).append(".ogg"));
diff --git a/src/gui/windows/setupwindow.cpp b/src/gui/windows/setupwindow.cpp
index 9deb27f65..29f9cf126 100644
--- a/src/gui/windows/setupwindow.cpp
+++ b/src/gui/windows/setupwindow.cpp
@@ -207,7 +207,8 @@ void SetupWindow::action(const ActionEvent &event)
 
 void SetupWindow::setInGame(const bool inGame)
 {
-    mResetWindows->setEnabled(inGame);
+    if (mResetWindows)
+        mResetWindows->setEnabled(inGame);
 }
 
 void SetupWindow::externalUpdate()
diff --git a/src/gui/windows/shortcutwindow.cpp b/src/gui/windows/shortcutwindow.cpp
index 774545cd6..ba3b97b46 100644
--- a/src/gui/windows/shortcutwindow.cpp
+++ b/src/gui/windows/shortcutwindow.cpp
@@ -167,7 +167,7 @@ void ShortcutWindow::addButton(const std::string &text,
 void ShortcutWindow::addTab(const std::string &name,
                             ShortcutContainer *const content)
 {
-    if (!content)
+    if (!content || !mTabs)
         return;
     ScrollArea *const scroll = new ScrollArea(this, content, false);
     scroll->setPosition(SCROLL_PADDING, SCROLL_PADDING);
diff --git a/src/gui/windows/socialwindow.cpp b/src/gui/windows/socialwindow.cpp
index fe8aaacbf..63a88c06f 100644
--- a/src/gui/windows/socialwindow.cpp
+++ b/src/gui/windows/socialwindow.cpp
@@ -352,6 +352,9 @@ void SocialWindow::action(const ActionEvent &event)
         if (!serverFeatures->haveNativeGuilds())
             return;
 
+        if (!mGuildCreateDialog)
+            return;
+
         std::string name = mGuildCreateDialog->getText();
 
         if (name.size() > 16)
@@ -374,6 +377,9 @@ void SocialWindow::action(const ActionEvent &event)
     }
     else if (eventId == "create party")
     {
+        if (!mPartyCreateDialog)
+            return;
+
         std::string name = mPartyCreateDialog->getText();
 
         if (name.size() > 24)
diff --git a/src/gui/windows/textcommandeditor.cpp b/src/gui/windows/textcommandeditor.cpp
index c2a5d66c9..5c59cd389 100644
--- a/src/gui/windows/textcommandeditor.cpp
+++ b/src/gui/windows/textcommandeditor.cpp
@@ -133,7 +133,8 @@ TextCommandEditor::TextCommandEditor(TextCommand *const command) :
 
     mIconDropDown->setActionEventId("icon");
     mIconDropDown->addActionListener(this);
-    mIconDropDown->setSelectedString(mCommand->getIcon());
+    if (mCommand)
+        mIconDropDown->setSelectedString(mCommand->getIcon());
 
     mSaveButton->adjustSize();
     mCancelButton->adjustSize();
@@ -291,6 +292,8 @@ void TextCommandEditor::scheduleDelete()
 
 void TextCommandEditor::save()
 {
+    if (!mCommand)
+        return;
 #ifdef TMWA_SUPPORT
     if (mIsMagicCommand)
         mCommand->setCommandType(TextCommandType::Magic);
@@ -318,6 +321,8 @@ void TextCommandEditor::save()
 
 void TextCommandEditor::deleteCommand()
 {
+    if (!mCommand)
+        return;
     mCommand->setSymbol("");
     mCommand->setCommand("");
     mCommand->setComment("");
diff --git a/src/gui/windows/textdialog.cpp b/src/gui/windows/textdialog.cpp
index 442cd5c67..f72f60d4e 100644
--- a/src/gui/windows/textdialog.cpp
+++ b/src/gui/windows/textdialog.cpp
@@ -36,6 +36,11 @@
 
 int TextDialog::instances = 0;
 
+namespace
+{
+    const std::string emptyStr;
+}  // namespace
+
 TextDialog::TextDialog(const std::string &restrict title,
                        const std::string &restrict msg,
                        Window *const parent,
@@ -110,15 +115,16 @@ const std::string &TextDialog::getText() const
 {
     if (mTextField)
         return mTextField->getText();
-    else
+    else if (mPasswordField)
         return mPasswordField->getText();
+    return emptyStr;
 }
 
 void TextDialog::setText(const std::string &text)
 {
     if (mTextField)
         mTextField->setText(text);
-    else
+    else if (mPasswordField)
         mPasswordField->setText(text);
 }
 
diff --git a/src/gui/windows/updaterwindow.cpp b/src/gui/windows/updaterwindow.cpp
index 242e32911..7d2e0c4f8 100644
--- a/src/gui/windows/updaterwindow.cpp
+++ b/src/gui/windows/updaterwindow.cpp
@@ -312,7 +312,8 @@ void UpdaterWindow::action(const ActionEvent &event)
         // Skip the updating process
         if (mDownloadStatus != UPDATE_COMPLETE)
         {
-            mDownload->cancel();
+            if (mDownload)
+                mDownload->cancel();
             mDownloadStatus = UPDATE_ERROR;
         }
     }
@@ -846,8 +847,8 @@ void UpdaterWindow::logic()
             mBrowserBox->addRow(_("##1  It is strongly recommended that"));
             // TRANSLATORS: Begins "It is strongly recommended that".
             mBrowserBox->addRow(_("##1  you try again later."));
-
-            mBrowserBox->addRow(mDownload->getError());
+            if (mDownload)
+                mBrowserBox->addRow(mDownload->getError());
             mScrollArea->setVerticalScrollAmount(
                     mScrollArea->getVerticalMaxScroll());
             mDownloadStatus = UPDATE_COMPLETE;