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"
@@ skipping 14 matching lines @@
                          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 28 matching lines @@
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Overridden from views::WidgetDelegate:
   virtual void OnDisplayChanged() OVERRIDE;
   virtual void OnWorkAreaChanged() OVERRIDE;
   virtual bool WillProcessWorkAreaChange() const OVERRIDE;
   virtual void OnWindowBeginUserBoundsChange() OVERRIDE;
   virtual void OnWindowEndUserBoundsChange() OVERRIDE;
+  virtual SkBitmap GetPreviewImage(const gfx::Size& size, bool live) OVERRIDE;
 
   // Overridden from views::Widget::Observer
   virtual void OnWidgetActivationChanged(views::Widget* widget,
                                          bool active) OVERRIDE;
 
   // Overridden from NativePanel:
   virtual void ShowPanel() OVERRIDE;
   virtual void ShowPanelInactive() OVERRIDE;
   virtual gfx::Rect GetPanelBounds() const OVERRIDE;
   virtual void SetPanelBounds(const gfx::Rect& bounds) OVERRIDE;
@@ skipping 25 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);
 
   bool IsAnimatingBounds() const;
 
 #if defined(OS_WIN) && !defined(USE_AURA)
   // Sets or clears the bitwise |attribute_value| for the attibute denoted by
   // |attribute_index|. This is used to update the style or extended style
   // for the native window.
   void UpdateWindowAttribute(int attribute_index,
                              int attribute_value,
                              bool to_set);
+
+  // Captures and returns the screenshot of the panel window. The caller is
+  // responsible to release the returned SkBitmap instance.
+  SkBitmap CaptureWindowImage();
 #endif
 
   scoped_ptr<Panel> panel_;
   gfx::Rect bounds_;
 
   // Is the panel being closed? Do not use it when it is closed.
   bool closed_;
 
   // Is the panel receiving the focus?
   bool focused_;
@@ skipping 10 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_AURA)
+  // The bitmap of panel screenshot before it is minimized. This is used to
+  // replace the live preview thumbnail when the panel is minimized.
+  scoped_ptr<SkBitmap> capture_bitmap_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(PanelBrowserView);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_VIEW_H_