Support minimizing the panel into 3-pixel line on Windows. Also support bringing up/down the titl...

chrome/browser/ui/panels/panel_manager_win.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_MANAGER_WIN_H_
+#define CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_WIN_H_
+#pragma once
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/ui/panels/panel_manager.h"
+
+class PanelManagerMouseWatcher;
+
+class PanelManagerWin : public PanelManager {

[jennb, 2011/06/27 23:18:02]

Hmmm...can we get away without platform specific panel manager?  This
implementation watches the bottom area of the screen to raise/lower all title
bars for minimized panels. If I understand correctly, it will do this even if
the mouse is at the bottom of an open panel.  Seems better to handle this within
each individual panel so that if the panel is minimized and the mouse hovers
over the bottom area of the screen where that panel is located (might not be on
minimized panel directly), then raise all titlebars of minimized panels.
Otherwise, if the mouse is in the lower portion of an open panel, leave
minimized panels alone. 

[jianli, 2011/06/29 01:28:12]

Done.

+ public:
+  PanelManagerWin();
+  virtual ~PanelManagerWin();
+
+  virtual void Remove(Panel* panel) OVERRIDE;
+  virtual void Minimize(Panel* panel) OVERRIDE;
+  virtual void Restore(Panel* panel, bool titlebar_only) OVERRIDE;
+
+ private:
+  friend class PanelManagerMouseWatcher;
+
+  // Ensures that the global mouse watcher is started so that we can bring
+  // up or down the titlebar for those minimized panels.
+  void EnsureMouseWatchStarted(int height_to_watch_on_mouse_enter,
+                               int height_to_watch_on_mouse_exit);
+
+  // Stops the global mouse watcher if it is not needed, when all panels are
+  // fully restored.
+  void StopMouseWatchIfNotNeeded();
+
+  // Brings up or down the titlebar for all minimized panels. This does not
+  // affect all other panels that are fully restored.
+  void BringUpTitleBarForAllMinimizedPanels();
+  void BringDownTitleBarForAllMinimizedPanels();
+
+  scoped_ptr<PanelManagerMouseWatcher> mouse_watcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(PanelManagerWin);
+};
+
+#endif  // CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_WIN_H_