Fix bug 105043: Panels [WIN]: For minimize panels, taskbar hover preview show the 4-pixel represent…

chrome/browser/ui/panels/panel_browser_view.h

 // Copyright (c) 2012 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_UI_PANELS_PANEL_BROWSER_VIEW_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_VIEW_H_
 #pragma once
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/panels/native_panel.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/base/animation/animation_delegate.h"
 
 class Browser;
 class NativePanelTestingWin;
 class Panel;
 class PanelBoundsAnimation;
 class PanelBrowserFrameView;
+class TaskbarWindowThumbnailerWin;
+namespace ui {
+class HWNDSubclass;
+}
 
 // A browser view that implements Panel specific behavior.
 class PanelBrowserView : public BrowserView,
                          public content::NotificationObserver,
                          public NativePanel,
                          public ui::AnimationDelegate {
  public:
   PanelBrowserView(Browser* browser, Panel* panel, const gfx::Rect& bounds);
   virtual ~PanelBrowserView();
 
   Panel* panel() const { return panel_.get(); }
   bool closed() const { return closed_; }
   bool focused() const { return focused_; }
+  bool force_to_paint_as_inactive() const {
+    return force_to_paint_as_inactive_;
+  }
 
   PanelBrowserFrameView* GetFrameView() const;
 
   // Called from frame view when titlebar receives a mouse event.
   // Return true if the event is handled.
   // |mouse_location| is in screen coordinates.
   bool OnTitlebarMousePressed(const gfx::Point& mouse_location);
   bool OnTitlebarMouseDragged(const gfx::Point& mouse_location);
   bool OnTitlebarMouseReleased(panel::ClickModifier modifier);
   bool OnTitlebarMouseCaptureLost();
@@ skipping 73 matching lines @@
       const gfx::Size& content_size) const OVERRIDE;
   virtual gfx::Size ContentSizeFromWindowSize(
       const gfx::Size& window_size) const OVERRIDE;
   virtual int TitleOnlyHeight() const OVERRIDE;
   virtual Browser* GetPanelBrowser() const OVERRIDE;
   virtual void DestroyPanelBrowser() OVERRIDE;
   virtual void EnsurePanelFullyVisible() OVERRIDE;
   virtual void SetPanelAlwaysOnTop(bool on_top) OVERRIDE;
   virtual void EnableResizeByMouse(bool enable) OVERRIDE;
   virtual void UpdatePanelMinimizeRestoreButtonVisibility() OVERRIDE;
+  virtual void PanelExpansionStateChanging(
+      Panel::ExpansionState old_state,
+      Panel::ExpansionState new_state) OVERRIDE;
 
   // Overridden from AnimationDelegate:
   virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
 
   bool EndDragging(bool cancelled);
 
   void SetBoundsInternal(const gfx::Rect& bounds, bool animate);
 
   void ShowOrHidePanelAppIcon(bool show);
@@ skipping 30 matching lines @@
   // moved more than kDragThreshold away from its starting position?
   MouseDraggingState mouse_dragging_state_;
 
   // Used to animate the bounds change.
   scoped_ptr<PanelBoundsAnimation> bounds_animator_;
   gfx::Rect animation_start_bounds_;
 
   // Is the panel in highlighted state to draw people's attention?
   bool is_drawing_attention_;
 
+  // Should we force to paint the panel as inactive? This is needed when we need
+  // to capture the screenshot before an active panel goes minimized.
+  bool force_to_paint_as_inactive_;
+
   // The last view that had focus in the panel. This is saved so that focus can
   // be restored properly when a drag ends.
   views::View* old_focused_view_;
 
   content::NotificationRegistrar registrar_;
 
+#if defined(OS_WIN) && !defined(USE_ASH) && !defined(USE_AURA)
+  // Used to provide custom taskbar thumbnail for Windows 7 and later.
+  // Note that once the subclass has been triggered, it should be kept alive
+  // for the live of the window.
+  scoped_ptr<ui::HWNDSubclass> thumbnail_subclass_;
+
+  // Weak, owned by thumbnail_subclass_.
+  TaskbarWindowThumbnailerWin* thumbnailer_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(PanelBrowserView);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_VIEW_H_