Provide the custom thumbnail for live preview of stacked panels

chrome/browser/ui/views/panels/panel_stack_view.h

Index: chrome/browser/ui/views/panels/panel_stack_view.h
diff --git a/chrome/browser/ui/views/panels/panel_stack_view.h b/chrome/browser/ui/views/panels/panel_stack_view.h
index 52c229952b75584f26c3a6a463bbe4d8bbf579b7..b3e42a309a0d7da7c8d8c2c0186388c4aeca03bd 100644
--- a/chrome/browser/ui/views/panels/panel_stack_view.h
+++ b/chrome/browser/ui/views/panels/panel_stack_view.h
@@ -15,7 +15,10 @@
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/views/widget/widget_observer.h"
 
-class TaskbarWindowThumbnailerWin;
+#if defined(OS_WIN)
+#include "chrome/browser/ui/views/panels/taskbar_window_thumbnailer_win.h"
+#endif
+
 namespace ui {
 class LinearAnimation;
 }
@@ -29,6 +32,9 @@ class PanelStackView : public NativePanelStackWindow,
                        public views::WidgetObserver,
                        public views::WidgetDelegateView,
                        public views::WidgetFocusChangeListener,
+#if defined(OS_WIN)
+                       public TaskbarWindowThumbnailerDelegateWin,
+#endif
                        public ui::AnimationDelegate {
  public:
   explicit PanelStackView(NativePanelStackWindowDelegate* delegate);
@@ -76,6 +82,10 @@ class PanelStackView : public NativePanelStackWindow,
   virtual void OnNativeFocusChange(gfx::NativeView focused_before,
                                    gfx::NativeView focused_now) OVERRIDE;
 
+#if defined(OS_WIN)

[Dmitry Titov, 2013/05/29 01:14:48]

Could you please group all OS_WIN things under a single #ifdef?

[jianli, 2013/05/29 18:31:52]

Done.

+  virtual std::vector<HWND> GetSnapshotWindowHandles() const OVERRIDE;
+#endif
+
   // Overridden from AnimationDelegate:
   virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
@@ -97,9 +107,14 @@ class PanelStackView : public NativePanelStackWindow,
                                             PanelStackView* stack_window);
 
 #if defined(OS_WIN)
+  // If there is a minimized panel in the stack, we want to provide our custom
+  // thumbnail to live preview. This is because the system preview of the
+  // minimized panel is showned up narrower than the regular panel.
+  void StartOrStopCustomThumbnailForMinimizePanel();
+
   // Capture the thumbnail of the whole stack and provide it to live preview
   // (available since Windows 7).
-  void CaptureThumbnailForLivePreview();
+  void CaptureThumbnailForLivePreview(bool should_capture_now);

[Dmitry Titov, 2013/05/29 01:14:48]

This should be named like "StartThumbnailer", because it is what it does. 

 
   // Updates the bounds of the widget window in a deferred way.
   void DeferUpdateNativeWindowBounds(HDWP defer_window_pos_info,
@@ -120,6 +135,12 @@ class PanelStackView : public NativePanelStackWindow,
   // draw the user's attention?
   bool is_drawing_attention_;
 
+  // True if the system minimize is being performed. On Windows, the system
+  // will activate the window before it is minimized. Sets this flag such that
+  // we will not stop the thumbnailer when the stack windows is activated due
+  // to this.
+  bool is_minimizing_;
+
 #if defined(OS_WIN)
   // Used to provide custom taskbar thumbnail for Windows 7 and later.
   scoped_ptr<TaskbarWindowThumbnailerWin> thumbnailer_;