GTK: First draft of using native themes, partially based on evan's CL 118358.

chrome/browser/gtk/custom_button.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_GTK_CUSTOM_BUTTON_H_
 #define CHROME_BROWSER_GTK_CUSTOM_BUTTON_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
@@ skipping 27 matching lines @@
   // INSENSITIVE is the last available state;
   GdkPixbuf* pixbufs_[GTK_STATE_INSENSITIVE + 1];
 
   // If non-negative, the state to paint the button.
   int paint_override_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomDrawButtonBase);
 };
 
 // CustomDrawButton is a plain button where all its various states are drawn
-// with static images.
+// with static images. In GTK rendering mode, it will show the standard button
+// with GTK |stock_id|.
 class CustomDrawButton {
  public:
   // The constructor takes 4 resource ids.  If a resource doesn't exist for a
   // button, pass in 0.
   CustomDrawButton(int normal_id,
                    int active_id,
                    int highlight_id,
-                   int depressed_id);
+                   int depressed_id,
+                   const char* stock_id);
   explicit CustomDrawButton(const std::string& filename);
   ~CustomDrawButton();
 
   GtkWidget* widget() const { return widget_.get(); }
 
   gfx::Rect bounds() const {
       return gfx::Rect(widget_->allocation.x,
                        widget_->allocation.y,
                        widget_->allocation.width,
                        widget_->allocation.height);
   }
 
   int width() const { return widget_->allocation.width; }
   int height() const { return widget_->allocation.height; }
 
+  // Sets properties on the GtkButton returned by widget(). By default, the
+  // button is very boring. This will either give it an image from the
+  // |gtk_stock_name_| if |use_gtk| is true or will use the chrome frame
+  // images.
+  void SetUseSystemTheme(bool use_gtk);
+
   // Set the state to draw. We will paint the widget as if it were in this
   // state.
   void SetPaintOverride(GtkStateType state);
 
   // Resume normal drawing of the widget's state.
   void UnsetPaintOverride();
 
   // Returns a standard close button.
   static CustomDrawButton* CloseButton();
 
  private:
-  // Callback for expose, used to draw the custom graphics.
-  static gboolean OnExpose(GtkWidget* widget,
-                           GdkEventExpose* e,
-                           CustomDrawButton* obj);
+  // Callback for custom button expose, used to draw the custom graphics.
+  static gboolean OnCustomExpose(GtkWidget* widget,
+                                 GdkEventExpose* e,
+                                 CustomDrawButton* obj);
 
   // The actual button widget.
   OwnedWidgetGtk widget_;
 
   CustomDrawButtonBase button_base_;
 
+  // The stock icon name.
+  const char* gtk_stock_name_;
+
+  // Whether we have an expose signal handler we may need to remove.
+  bool has_expose_signal_handler_;
+
   DISALLOW_COPY_AND_ASSIGN(CustomDrawButton);
 };
 
 #endif  // CHROME_BROWSER_GTK_CUSTOM_BUTTON_H_