Extend checkbox theming.

New options:
    padding - padding from all sides except left
    imagePadding - padding from left before image
    imageSize - image size for computation width
    spacing - space between image and text

width = imagePadding + imageSize + spacing + text width + padding
height = padding + text height + padding

8 files changed, 80 insertions, 121 deletions

diff --git a/src/gui/logindialog.h b/src/gui/logindialog.h
index 8cc94df04..d08eade5e 100644
--- a/src/gui/logindialog.h
+++ b/src/gui/logindialog.h
@@ -33,6 +33,7 @@
 #include <vector>
 
 class Button;
+class CheckBox;
 class DropDown;
 class Label;
 class LoginData;
@@ -41,7 +42,6 @@ class UpdateTypeModel;
 
 namespace gcn
 {
-    class CheckBox;
     class TextField;
 }
 
@@ -90,7 +90,7 @@ class LoginDialog final : public Window, public gcn::ActionListener,
 
         gcn::TextField *mUserField;
         gcn::TextField *mPassField;
-        gcn::CheckBox *mKeepCheck;
+        CheckBox *mKeepCheck;
         Label *mUpdateTypeLabel;
         Label *mUpdateHostLabel;
         UpdateTypeModel *mUpdateTypeModel;
@@ -98,7 +98,7 @@ class LoginDialog final : public Window, public gcn::ActionListener,
         Button *mServerButton;
         Button *mLoginButton;
         Button *mRegisterButton;
-        gcn::CheckBox *mCustomUpdateHost;
+        CheckBox *mCustomUpdateHost;
         gcn::TextField *mUpdateHostText;
         UpdateListModel *mUpdateListModel;
         DropDown *mUpdateHostDropDown;
diff --git a/src/gui/setup_joystick.h b/src/gui/setup_joystick.h
index 2082414dc..17b8f6df1 100644
--- a/src/gui/setup_joystick.h
+++ b/src/gui/setup_joystick.h
@@ -28,15 +28,11 @@
 #include <guichan/actionlistener.hpp>
 
 class Button;
+class CheckBox;
 class DropDown;
 class Label;
 class NamesModel;
 
-namespace gcn
-{
-    class CheckBox;
-}
-
 class Setup_Joystick final : public SetupTab
 {
     public:
@@ -58,10 +54,10 @@ class Setup_Joystick final : public SetupTab
         Label *mCalibrateLabel;
         Button *mCalibrateButton;
         bool mOriginalJoystickEnabled;
-        gcn::CheckBox *mJoystickEnabled;
+        CheckBox *mJoystickEnabled;
         NamesModel *mNamesModel;
         DropDown *mNamesDropDown;
-        gcn::CheckBox *mUseInactiveCheckBox;
+        CheckBox *mUseInactiveCheckBox;
 };
 
 #endif
diff --git a/src/gui/setup_relations.h b/src/gui/setup_relations.h
index 0e663aed6..8564c8ab7 100644
--- a/src/gui/setup_relations.h
+++ b/src/gui/setup_relations.h
@@ -30,6 +30,7 @@
 #include <guichan/actionlistener.hpp>
 
 class Button;
+class CheckBox;
 class EditDialog;
 class GuiTable;
 class PlayerTableModel;
@@ -37,7 +38,6 @@ class StaticTableModel;
 
 namespace gcn
 {
-    class CheckBox;
     class DropDown;
     class ListModel;
     class ScrollArea;
@@ -74,8 +74,8 @@ private:
     GuiTable *mPlayerTitleTable;
     gcn::ScrollArea *mPlayerScrollArea;
 
-    gcn::CheckBox *mDefaultTrading;
-    gcn::CheckBox *mDefaultWhisper;
+    CheckBox *mDefaultTrading;
+    CheckBox *mDefaultWhisper;
 
     Button *mDeleteButton;
 
diff --git a/src/gui/setup_video.h b/src/gui/setup_video.h
index 6ae5af1d6..6144de8d8 100644
--- a/src/gui/setup_video.h
+++ b/src/gui/setup_video.h
@@ -31,6 +31,7 @@
 #include <guichan/keylistener.hpp>
 
 class Button;
+class CheckBox;
 class Label;
 class ListBox;
 class ModeListModel;
@@ -39,7 +40,6 @@ class TextDialog;
 
 namespace gcn
 {
-    class CheckBox;
     class DropDown;
     class Slider;
 }
@@ -78,14 +78,14 @@ class Setup_Video final : public SetupTab, public gcn::KeyListener
         Label *scrollLazinessLabel;
 
         ListBox *mModeList;
-        gcn::CheckBox *mFsCheckBox;
+        CheckBox *mFsCheckBox;
         gcn::DropDown *mOpenGLDropDown;
-        gcn::CheckBox *mCustomCursorCheckBox;
+        CheckBox *mCustomCursorCheckBox;
 
-        gcn::CheckBox *mEnableResizeCheckBox;
-        gcn::CheckBox *mNoFrameCheckBox;
+        CheckBox *mEnableResizeCheckBox;
+        CheckBox *mNoFrameCheckBox;
 
-        gcn::CheckBox *mFpsCheckBox;
+        CheckBox *mFpsCheckBox;
         gcn::Slider *mFpsSlider;
         Label *mFpsLabel;
         gcn::Slider *mAltFpsSlider;
diff --git a/src/gui/shopwindow.h b/src/gui/shopwindow.h
index 11e7f5e69..dbf102f85 100644
--- a/src/gui/shopwindow.h
+++ b/src/gui/shopwindow.h
@@ -164,7 +164,7 @@ class ShopWindow final : public Window, public gcn::ActionListener,
         Button *mSellDeleteButton;
         Button *mSellAnnounceButton;
         Button *mSellAuctionButton;
-        gcn::CheckBox *mAnnounceLinks;
+        CheckBox *mAnnounceLinks;
 
         int mSelectedItem;
         int mAnnonceTime;
diff --git a/src/gui/widgets/checkbox.cpp b/src/gui/widgets/checkbox.cpp
index 44d504d2c..8349247a4 100644
--- a/src/gui/widgets/checkbox.cpp
+++ b/src/gui/widgets/checkbox.cpp
@@ -34,58 +34,30 @@
 #include "resources/image.h"
 
 #include <guichan/actionlistener.hpp>
+#include <guichan/font.hpp>
 
 #include "debug.h"
 
 int CheckBox::instances = 0;
+Skin *CheckBox::mSkin = nullptr;
 float CheckBox::mAlpha = 1.0;
-Image *CheckBox::checkBoxNormal;
-Image *CheckBox::checkBoxChecked;
-Image *CheckBox::checkBoxDisabled;
-Image *CheckBox::checkBoxDisabledChecked;
-Image *CheckBox::checkBoxNormalHi;
-Image *CheckBox::checkBoxCheckedHi;
 
 CheckBox::CheckBox(const std::string &caption, const bool selected,
                    gcn::ActionListener *const listener,
                    const std::string &eventId) :
     gcn::CheckBox(caption, selected),
-    mHasMouse(false)
+    mHasMouse(false),
+    mPadding(0),
+    mImagePadding(0),
+    mImageSize(9),
+    mSpacing(2)
 {
     if (instances == 0)
     {
         if (Theme::instance())
         {
-            ImageRect rect;
-            Theme::instance()->loadRect(rect, "checkbox.xml", "", 0, 5);
-            checkBoxNormal = rect.grid[0];
-            checkBoxChecked = rect.grid[1];
-            checkBoxDisabled = rect.grid[2];
-            checkBoxDisabledChecked = rect.grid[3];
-            checkBoxNormalHi = rect.grid[4];
-            checkBoxCheckedHi = rect.grid[5];
-
-            if (checkBoxNormal)
-                checkBoxNormal->setAlpha(mAlpha);
-            if (checkBoxChecked)
-                checkBoxChecked->setAlpha(mAlpha);
-            if (checkBoxDisabled)
-                checkBoxDisabled->setAlpha(mAlpha);
-            if (checkBoxDisabledChecked)
-                checkBoxDisabledChecked->setAlpha(mAlpha);
-            if (checkBoxNormalHi)
-                checkBoxNormalHi->setAlpha(mAlpha);
-            if (checkBoxCheckedHi)
-                checkBoxCheckedHi->setAlpha(mAlpha);
-        }
-        else
-        {
-            checkBoxNormal = nullptr;
-            checkBoxChecked = nullptr;
-            checkBoxDisabled = nullptr;
-            checkBoxDisabledChecked = nullptr;
-            checkBoxNormalHi = nullptr;
-            checkBoxCheckedHi = nullptr;
+            mSkin = Theme::instance()->load("checkbox.xml", "");
+            updateAlpha();
         }
     }
 
@@ -98,6 +70,14 @@ CheckBox::CheckBox(const std::string &caption, const bool selected,
         addActionListener(listener);
 
     mForegroundColor = Theme::getThemeColor(Theme::CHECKBOX);
+    if (mSkin)
+    {
+        mPadding = mSkin->getPadding();
+        mImagePadding = mSkin->getOption("imagePadding");
+        mImageSize = mSkin->getOption("imageSize");
+        mSpacing = mSkin->getOption("spacing");
+    }
+    adjustSize();
 }
 
 CheckBox::~CheckBox()
@@ -106,36 +86,8 @@ CheckBox::~CheckBox()
 
     if (instances == 0)
     {
-        if (checkBoxNormal)
-        {
-            checkBoxNormal->decRef();
-            checkBoxNormal = nullptr;
-        }
-        if (checkBoxChecked)
-        {
-            checkBoxChecked->decRef();
-            checkBoxChecked = nullptr;
-        }
-        if (checkBoxDisabled)
-        {
-            checkBoxDisabled->decRef();
-            checkBoxDisabled = nullptr;
-        }
-        if (checkBoxDisabledChecked)
-        {
-            checkBoxDisabledChecked->decRef();
-            checkBoxDisabledChecked = nullptr;
-        }
-        if (checkBoxNormalHi)
-        {
-            checkBoxNormalHi->decRef();
-            checkBoxNormalHi = nullptr;
-        }
-        if (checkBoxCheckedHi)
-        {
-            checkBoxCheckedHi->decRef();
-            checkBoxCheckedHi = nullptr;
-        }
+        if (Theme::instance())
+            Theme::instance()->unload(mSkin);
     }
 }
 
@@ -146,9 +98,8 @@ void CheckBox::draw(gcn::Graphics* graphics)
     graphics->setFont(getFont());
     graphics->setColor(mForegroundColor);
 
-    const int h = getHeight() + getHeight() / 2;
-
-    graphics->drawText(getCaption(), h - 2, 0);
+    graphics->drawText(getCaption(), mPadding + mImageSize + mSpacing,
+        mPadding);
 }
 
 void CheckBox::updateAlpha()
@@ -159,54 +110,60 @@ void CheckBox::updateAlpha()
     if (mAlpha != alpha)
     {
         mAlpha = alpha;
-        if (checkBoxNormal)
-            checkBoxNormal->setAlpha(mAlpha);
-        if (checkBoxChecked)
-            checkBoxChecked->setAlpha(mAlpha);
-        if (checkBoxDisabled)
-            checkBoxDisabled->setAlpha(mAlpha);
-        if (checkBoxDisabledChecked)
-            checkBoxDisabledChecked->setAlpha(mAlpha);
-        if (checkBoxNormal)
-            checkBoxNormal->setAlpha(mAlpha);
-        if (checkBoxCheckedHi)
-            checkBoxCheckedHi->setAlpha(mAlpha);
+        if (mSkin)
+        {
+            ImageRect &rect = mSkin->getBorder();
+            for (int a = 0; a < 6; a ++)
+            {
+                Image *const image = rect.grid[a];
+                if (image)
+                    image->setAlpha(mAlpha);
+            }
+        }
     }
 }
 
 void CheckBox::drawBox(gcn::Graphics *const graphics)
 {
-    const Image *box;
+    if (!mSkin)
+        return;
+
+    ImageRect &rect = mSkin->getBorder();
+    int index = 0;
 
     if (mEnabled && isVisible())
     {
         if (mSelected)
         {
             if (mHasMouse)
-                box = checkBoxCheckedHi;
+                index = 5;
             else
-                box = checkBoxChecked;
+                index = 1;
         }
         else
         {
             if (mHasMouse)
-                box = checkBoxNormalHi;
+                index = 4;
             else
-                box = checkBoxNormal;
+                index = 0;
         }
     }
     else
     {
         if (mSelected)
-            box = checkBoxDisabledChecked;
+            index = 3;
         else
-            box = checkBoxDisabled;
+            index = 2;
     }
+    const Image *const box = rect.grid[index];
 
     updateAlpha();
 
     if (box)
-        static_cast<Graphics*>(graphics)->drawImage(box, 2, 2);
+    {
+        static_cast<Graphics*>(graphics)->drawImage(
+            box, mImagePadding, (getHeight() - mImageSize) / 2);
+    }
 }
 
 void CheckBox::mouseEntered(gcn::MouseEvent& event A_UNUSED)
@@ -229,3 +186,10 @@ void CheckBox::keyPressed(gcn::KeyEvent& keyEvent)
         keyEvent.consume();
     }
 }
+
+void CheckBox::adjustSize()
+{
+    setHeight(getFont()->getHeight() + 2 * mPadding);
+    setWidth(mImagePadding + mImageSize + mSpacing
+        + getFont()->getWidth(mCaption) + mPadding);
+}
diff --git a/src/gui/widgets/checkbox.h b/src/gui/widgets/checkbox.h
index 654c48d62..0ca579d3b 100644
--- a/src/gui/widgets/checkbox.h
+++ b/src/gui/widgets/checkbox.h
@@ -28,6 +28,7 @@
 #include "localconsts.h"
 
 class Image;
+class Skin;
 
 /**
  * Check box widget. Same as the Guichan check box but with custom look.
@@ -78,16 +79,18 @@ class CheckBox final : public gcn::CheckBox
 
         void keyPressed(gcn::KeyEvent& keyEvent) override;
 
+        void adjustSize();
+
     private:
+        bool mHasMouse;
+        int mPadding;
+        int mImagePadding;
+        int mImageSize;
+        int mSpacing;
+
         static int instances;
+        static Skin *mSkin;
         static float mAlpha;
-        bool mHasMouse;
-        static Image *checkBoxNormal;
-        static Image *checkBoxChecked;
-        static Image *checkBoxDisabled;
-        static Image *checkBoxDisabledChecked;
-        static Image *checkBoxNormalHi;
-        static Image *checkBoxCheckedHi;
 };
 
 #endif
diff --git a/src/guichan/widgets/checkbox.cpp b/src/guichan/widgets/checkbox.cpp
index 58710409b..dcac59d17 100644
--- a/src/guichan/widgets/checkbox.cpp
+++ b/src/guichan/widgets/checkbox.cpp
@@ -123,10 +123,6 @@ namespace gcn
 
     void CheckBox::adjustSize()
     {
-        const int height = getFont()->getHeight();
-
-        setHeight(height);
-        setWidth(getFont()->getWidth(mCaption) + height + height / 2);
     }
 
     void CheckBox::toggleSelected()