Add PanelOverflowStrip to handle panel overflow.

chrome/browser/ui/panels/panel_strip.h

 // Copyright (c) 2011 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_STRIP_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_STRIP_H_
 #pragma once
 
 #include <vector>
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/panels/auto_hiding_desktop_bar.h"
 #include "chrome/browser/ui/panels/panel_mouse_watcher_observer.h"
 #include "chrome/browser/ui/panels/panel.h"

[jennb, 2011/12/02 21:16:58]

Could you move this before panel_mouse_watcher_observer.h for me? I misordered
it in my patch. Thx.

[jianli, 2011/12/02 23:23:46]

Done.

 #include "ui/gfx/rect.h"
 
 class Browser;
 class PanelManager;
 
 // This class manages a group of panels displayed in a horizontal strip,
 // positioning the panels and controlling how they are displayed.
 // Panels in the strip appear minimized, showing title-only or expanded.
 // All panels in the strip are contained within the bounds of the strip.
 class PanelStrip : public PanelMouseWatcherObserver {
  public:
   typedef std::vector<Panel*> Panels;
 
   explicit PanelStrip(PanelManager* panel_manager);
   virtual ~PanelStrip();
 
   // Sets the bounds of the panel strip.
   // |bounds| is in screen coordinates.

[jennb, 2011/12/02 21:16:58]

Could you cleanup |bounds| for me? Thx.

[jianli, 2011/12/02 23:23:46]

Done.

   void SetDisplayArea(const gfx::Rect& area);
 
   // Adds a panel to the strip. The panel may be a newly created panel or one
   // that is transitioning from another grouping of panels.
   void AddPanel(Panel* panel);
 
   // Returns |false| if the panel is not in the strip.
   bool Remove(Panel* panel);
   void RemoveAll();
 
   // Drags the given panel.
   void StartDragging(Panel* panel);
   void Drag(int delta_x);
   void EndDragging(bool cancelled);
 
   // Invoked when a panel's expansion state changes.
-  void OnPanelExpansionStateChanged(Panel::ExpansionState old_state,
-                                    Panel::ExpansionState new_state);
+  void OnPanelExpansionStateChanged(Panel* panel,
+                                    Panel::ExpansionState old_state);
 
   // Invoked when the preferred window size of the given panel might need to
   // get changed.
   void OnPreferredWindowSizeChanged(
       Panel* panel, const gfx::Size& preferred_window_size);
 
   // Returns true if we should bring up the titlebars, given the current mouse
   // point.
   bool ShouldBringUpTitlebars(int mouse_x, int mouse_y) const;
 
   // Brings up or down the titlebars for all minimized panels.
   void BringUpOrDownTitlebars(bool bring_up);
 
   // Returns the bottom position for the panel per its expansion state. If auto-
   // hide bottom bar is present, we want to move the minimized panel to the
   // bottom of the screen, not the bottom of the work area.
   int GetBottomPositionForExpansionState(
       Panel::ExpansionState expansion_state) const;
 
   int num_panels() const { return panels_.size(); }
   bool is_dragging_panel() const;
   const Panels& panels() const { return panels_; }
+  gfx::Rect display_area() const { return display_area_; }
 
   int GetMaxPanelWidth() const;
   int GetMaxPanelHeight() const;
   int StartingRightPosition() const;
 
   // Overridden from PanelMouseWatcherObserver:
   virtual void OnMouseMove(const gfx::Point& mouse_position) OVERRIDE;
 
   void OnAutoHidingDesktopBarVisibilityChanged(
       AutoHidingDesktopBar::Alignment alignment,
@@ skipping 107 matching lines @@
   // Absolute minimum width and height for panels, including non-client area.
   // Should only be big enough to accomodate a close button on the reasonably
   // recognisable titlebar.
   static const int kPanelMinWidth;
   static const int kPanelMinHeight;
 
   DISALLOW_COPY_AND_ASSIGN(PanelStrip);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_STRIP_H_