Panel auto-resize for GTK.

chrome/browser/ui/panels/panel_browser_window_gtk.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_BROWSER_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_WINDOW_GTK_H_
 
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 #include "chrome/browser/ui/gtk/menu_gtk.h"
 #include "chrome/browser/ui/panels/native_panel.h"
@@ skipping 23 matching lines @@
  protected:
   // BrowserWindowGtk overrides
   virtual bool GetWindowEdge(int x, int y, GdkWindowEdge* edge) OVERRIDE;
   virtual bool HandleTitleBarLeftMousePress(
       GdkEventButton* event,
       guint32 last_click_time,
       gfx::Point last_click_position) OVERRIDE;
   virtual void SaveWindowPosition() OVERRIDE;
   virtual void SetGeometryHints() OVERRIDE;
   virtual bool UseCustomFrame() OVERRIDE;
+  virtual void OnSizeChanged(int width, int height) 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;
   virtual void OnPanelExpansionStateChanged(
       Panel::ExpansionState expansion_state) OVERRIDE;
   virtual bool ShouldBringUpPanelTitlebar(int mouse_x,
                                           int mouse_y) const OVERRIDE;
@@ skipping 15 matching lines @@
       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void HandlePanelKeyboardEvent(
       const NativeWebKeyboardEvent& event) OVERRIDE;
   virtual Browser* GetPanelBrowser() const OVERRIDE;
   virtual void DestroyPanelBrowser() OVERRIDE;
   virtual gfx::Size GetNonClientAreaExtent() const OVERRIDE;
   virtual int GetRestoredHeight() const OVERRIDE;
   virtual void SetRestoredHeight(int height) OVERRIDE;
 
  private:
-  // Resize the window as specified by the bounds. Move the window to the
-  // specified location only if "move" is true. We set the window gravity to be
-  // GDK_GRAVITY_SOUTH_EAST which means the window is anchored to the bottom
-  // right corner on resize, making it unnecessary to move the window if the
-  // bottom right corner is unchanged, for example when we minimize to the
-  // bottom. Moving can actually result in the wrong behavior.
+  // Resize the window as specified by the bounds.
+  // Panels use window gravity of GDK_GRAVITY_SOUTH_EAST which means the
+  // window is anchored to the bottom right corner on resize, making it
+  // unnecessary to move the window if the bottom right corner is unchanged.
+  // For example, when we minimize to the bottom, moving can actually
+  // result in the wrong behavior.
   //   - Say window is 100x100 with x,y=900,900 on a 1000x1000 screen.
   //   - Say you minimize the window to 100x3 and move it to 900,997 to keep it
   //     anchored to the bottom.
   //   - resize is an async operation and the window manager will decide that
   //     the move will take the window off screen and it won't honor the
   //     request.
   //   - When resize finally happens, you'll have a 100x3 window a x,y=900,900.
-  void SetBoundsImpl(const gfx::Rect& bounds, bool move);
+  // Set |force_move| to true to force a move regardless. Otherwise, the
+  // window is only moved if the bottom right corner is being changed.
+  void SetBoundsImpl(const gfx::Rect& bounds, bool force_move);
 
   // MessageLoop::Observer implementation:
   virtual void WillProcessEvent(GdkEvent* event) OVERRIDE;
   virtual void DidProcessEvent(GdkEvent* event) OVERRIDE;
 
   void CreateDragWidget();
   void DestroyDragWidget();
   void EndDrag(bool canceled);
   void CleanupDragDrop();
 
@@ skipping 46 matching lines @@
   scoped_ptr<Panel> panel_;
   gfx::Rect bounds_;
 
   scoped_ptr<PanelSettingsMenuModel> settings_menu_model_;
   scoped_ptr<MenuGtk> settings_menu_;
 
   // Stores the original height of the panel so we can restore it after it's
   // been minimized.
   int restored_height_;
 
+  // False until the window has been allocated and the size of browser window
+  // frame around the content is known.
+  bool non_client_area_size_known_;
+
   DISALLOW_COPY_AND_ASSIGN(PanelBrowserWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_WINDOW_GTK_H_