Support detaching/attaching panels via inter-strip drags.

chrome/browser/ui/panels/panel.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_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_H_
 #pragma once
 
 #include "chrome/browser/ui/browser_window.h"
 
@@ skipping 212 matching lines @@
 
   // Sets the current panel strip that contains this panel.
   void set_panel_strip(PanelStrip* new_strip) { panel_strip_ = new_strip; }
 
   ExpansionState expansion_state() const { return expansion_state_; }
   ExpansionState old_expansion_state() const { return old_expansion_state_; }
   const gfx::Size& min_size() const { return min_size_; }
   const gfx::Size& max_size() const { return max_size_; }
   bool auto_resizable() const { return auto_resizable_; }
 
+  bool in_preview_mode() const { return in_preview_mode_; }
+
   bool draggable() const;
 
   // The restored size is the size of the panel when it is expanded.
   gfx::Size restored_size() const { return restored_size_; }
   void set_restored_size(const gfx::Size& size) { restored_size_ = size; }
 
   // Panel must be initialized to be "fully created" and ready for use.
   // Only called by PanelManager.
   bool initialized() const { return initialized_; }
   void Initialize(const gfx::Rect& bounds);
 
   // This is different from BrowserWindow::SetBounds():
   // * SetPanelBounds() is only called by PanelManager to manage its position.
   // * SetBounds() is called by the API to try to change the bounds, which is
   //   not allowed for Panel.
   void SetPanelBounds(const gfx::Rect& bounds);
 
   // Updates the panel bounds instantly without any animation.
   void SetPanelBoundsInstantly(const gfx::Rect& bounds);
 
   // Sets whether the panel will auto resize according to its content.
   void SetAutoResizable(bool resizable);
 
   // Sets minimum and maximum size for the panel.
   void SetSizeRange(const gfx::Size& min_size, const gfx::Size& max_size);
 
   // Sets whether the panel app icon is visible in the taskbar.
   void SetAppIconVisibility(bool visible);
 
+  // Sets whether the panel window is always on top.
+  void SetAlwaysOnTop(bool on_top);
+
+  // Sets whether the panel is shown in preview mode. When the panel is
+  // being dragged, it is in preview mode.
+  void SetPreviewMode(bool in_preview_mode);
+
   // Newly created panels may be placed in a temporary layout until their
   // final position is determined.
   bool has_temporary_layout() const { return has_temporary_layout_; }
   void set_has_temporary_layout(bool temporary) {
     has_temporary_layout_ = temporary;
   }
 
  protected:
   virtual void DestroyBrowser() OVERRIDE;
 
@@ skipping 33 matching lines @@
   // This is the minimum size that the panel can shrink to.
   gfx::Size min_size_;
 
   // This is the size beyond which the panel is not going to grow to accomodate
   // the growing content and WebKit would add the scrollbars in such case.
   gfx::Size max_size_;
 
   // True if this panel auto resizes based on content.
   bool auto_resizable_;
 
+  // True if this panel should stay always on top of other windows.

[jennb, 2012/03/08 23:41:09]

s/stay always/always stay

[jianli, 2012/03/09 21:48:58]

Done.

+  bool always_on_top_;
+
+  // True if this panel is in preview mode. That is, panel bounds should not be

[jennb, 2012/03/08 23:41:09]

s/That is,/When in preview mode

[jianli, 2012/03/09 21:48:58]

Done.

+  // affected by layout refresh. This is currently used by drag controller to
+  // add a panel to the strip without causing its bounds changed.

[jennb, 2012/03/08 23:41:09]

s/changed/to change

[jianli, 2012/03/09 21:48:58]

Done.

+  bool in_preview_mode_;
+
   // Platform specifc implementation for panels.  It'd be one of
   // PanelBrowserWindowGtk/PanelBrowserView/PanelBrowserWindowCocoa.
   NativePanel* native_panel_;  // Weak, owns us.
 
   ExpansionState expansion_state_;
   ExpansionState old_expansion_state_;
 
-  // Indicates whether the panel app icon is visible in the taskbar.
-  bool app_icon_visible_;
-
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(Panel);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_H_