From bafc0d9e90cd94c4b02588b29bf919f38af8bd16 Mon Sep 17 00:00:00 2001
From: Andrei Kortunov <andrei.kortunov@yandex.ru>
Date: Sat, 9 Nov 2019 12:51:12 +0400
Subject: [PATCH] Added support for texture fragment usage to the ImageButton

---
 components/widgets/imagebutton.cpp | 43 +++++++++++++++++++++++++-----
 components/widgets/imagebutton.hpp |  5 ++++
 2 files changed, 42 insertions(+), 6 deletions(-)

diff --git a/components/widgets/imagebutton.cpp b/components/widgets/imagebutton.cpp
index 2ea494ebd0..0d1f798da5 100644
--- a/components/widgets/imagebutton.cpp
+++ b/components/widgets/imagebutton.cpp
@@ -14,6 +14,8 @@ namespace Gui
         , mMouseFocus(false)
         , mMousePress(false)
         , mKeyFocus(false)
+        , mUseWholeTexture(true)
+        , mTextureRect(MyGUI::IntCoord(0, 0, 0, 0))
     {
         setNeedKeyFocus(sDefaultNeedKeyFocus);
     }
@@ -23,6 +25,13 @@ namespace Gui
         sDefaultNeedKeyFocus = enabled;
     }
 
+    void ImageButton::setTextureRect(MyGUI::IntCoord coord)
+    {
+        mTextureRect = coord;
+        mUseWholeTexture = (coord == MyGUI::IntCoord(0, 0, 0, 0));
+        updateImage();
+    }
+
     void ImageButton::setPropertyOverride(const std::string &_key, const std::string &_value)
     {
         if (_key == "ImageHighlighted")
@@ -37,6 +46,11 @@ namespace Gui
             }
             mImageNormal = _value;
         }
+        else if (_key == "TextureRect")
+        {
+            mTextureRect = MyGUI::IntCoord::parse(_value);
+            mUseWholeTexture = (mTextureRect == MyGUI::IntCoord(0, 0, 0, 0));
+        }
         else
             ImageBox::setPropertyOverride(_key, _value);
     }
@@ -66,12 +80,25 @@ namespace Gui
 
     void ImageButton::updateImage()
     {
+        std::string textureName = mImageNormal;
         if (mMousePress)
-            setImageTexture(mImagePushed);
+            textureName = mImagePushed;
         else if (mMouseFocus || mKeyFocus)
-            setImageTexture(mImageHighlighted);
-        else
-            setImageTexture(mImageNormal);
+            textureName = mImageHighlighted;
+
+        if (!mUseWholeTexture)
+        {
+            int scale = 1.f;
+            MyGUI::ITexture* texture = MyGUI::RenderManager::getInstance().getTexture(textureName);
+            if (texture && getHeight() != 0)
+                scale = texture->getHeight() / getHeight();
+
+            setImageTile(MyGUI::IntSize(mTextureRect.width * scale, mTextureRect.height * scale));
+            MyGUI::IntCoord scaledSize(mTextureRect.left * scale, mTextureRect.top * scale, mTextureRect.width * scale, mTextureRect.height * scale);
+            setImageCoord(scaledSize);
+        }
+
+        setImageTexture(textureName);
     }
 
     MyGUI::IntSize ImageButton::getRequestedSize()
@@ -82,7 +109,11 @@ namespace Gui
             Log(Debug::Error) << "ImageButton: can't find image " << mImageNormal;
             return MyGUI::IntSize(0,0);
         }
-        return MyGUI::IntSize (texture->getWidth(), texture->getHeight());
+
+        if (mUseWholeTexture)
+            return MyGUI::IntSize(texture->getWidth(), texture->getHeight());
+
+        return MyGUI::IntSize(mTextureRect.width, mTextureRect.height);
     }
 
     void ImageButton::setImage(const std::string &image)
@@ -96,7 +127,7 @@ namespace Gui
         mImageHighlighted = imageNoExt + "_over" + ext;
         mImagePushed = imageNoExt + "_pressed" + ext;
 
-        setImageTexture(mImageNormal);
+        updateImage();
     }
 
     void ImageButton::onMouseButtonReleased(int _left, int _top, MyGUI::MouseButton _id)
diff --git a/components/widgets/imagebutton.hpp b/components/widgets/imagebutton.hpp
index bfcff79979..bb2baa91ff 100644
--- a/components/widgets/imagebutton.hpp
+++ b/components/widgets/imagebutton.hpp
@@ -23,6 +23,8 @@ namespace Gui
         /// Set mImageNormal, mImageHighlighted and mImagePushed based on file convention (image_idle.ext, image_over.ext and image_pressed.ext)
         void setImage(const std::string& image);
 
+        void setTextureRect(MyGUI::IntCoord coord);
+
     private:
         void updateImage();
 
@@ -44,6 +46,9 @@ namespace Gui
         bool mMouseFocus;
         bool mMousePress;
         bool mKeyFocus;
+        bool mUseWholeTexture;
+
+        MyGUI::IntCoord mTextureRect;
     };
 
 }