Make the gtk download shelf autoclose on mouse out.

chrome/browser/ui/gtk/download_shelf_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_GTK_DOWNLOAD_SHELF_GTK_H_
 #define CHROME_BROWSER_UI_GTK_DOWNLOAD_SHELF_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
 #include <vector>
 
+#include "base/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/download/download_shelf.h"
 #include "chrome/browser/ui/gtk/owned_widget_gtk.h"
 #include "chrome/browser/ui/gtk/slide_animator_gtk.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 #include "gfx/native_widget_types.h"
 #include "ui/base/gtk/gtk_signal.h"
 
 class BaseDownloadItemModel;
 class Browser;
 class CustomDrawButton;
 class DownloadItemGtk;
 class GtkThemeProvider;
 class SlideAnimatorGtk;
 
+namespace gfx {
+class Point;
+}
+
 class DownloadShelfGtk : public DownloadShelf,
                          public NotificationObserver,
-                         public SlideAnimatorGtk::Delegate {
+                         public SlideAnimatorGtk::Delegate,
+                         public MessageLoopForUI::Observer {
  public:
   explicit DownloadShelfGtk(Browser* browser, gfx::NativeView view);
 
   ~DownloadShelfGtk();
 
   // DownloadShelf implementation.
   virtual void AddDownload(BaseDownloadItemModel* download_model);
   virtual bool IsShowing() const;
   virtual bool IsClosing() const;
   virtual void Show();
   virtual void Close();
   virtual Browser* browser() const;
 
   // SlideAnimatorGtk::Delegate implementation.
   virtual void Closed();
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // Returns the current height of the shelf.
   int GetHeight() const;
 
+  // MessageLoop::Observer implementation:
+  virtual void WillProcessEvent(GdkEvent* event);
+  virtual void DidProcessEvent(GdkEvent* event);
+
  private:
   // Remove |download_item| from the download shelf and delete it.
   void RemoveDownloadItem(DownloadItemGtk* download_item);
 
   // Get the hbox download items ought to pack themselves into.
   GtkWidget* GetHBox() const;
 
   // Show more hidden download items if there is enough space in the shelf.
   // It's called when a download item is removed from the shelf or an item's
   // size is changed.
   void MaybeShowMoreDownloadItems();
 
+  // Checks that all download items have been opened, and sets the auto-close
+  // state of the shelf if so.
+  void AutoCloseIfPossible();
+
+  // Cancels the auto-close state set by AutoCloseIfPossible, including any
+  // pending close tasks that have already been posted.
+  void CancelAutoClose();
+
+  // A download item has been opened. It might be possible to automatically
+  // close now.
+  void ItemOpened();
+
+  // Sets whether the shelf should automatically close.
+  void SetCloseOnMouseOut(bool close);
+
+  // Returns whether the given point is within the "zone" of the shelf, which is
+  // the shelf and a band of 40 pixels on the top of it.
+  bool IsCursorInShelfZone(const gfx::Point& cursor_screen_coords);
+
+  // Synthesized enter-notify and leave-notify events for the shelf's "zone".
+  void MouseLeftShelf();
+  void MouseEnteredShelf();
+
   CHROMEGTK_CALLBACK_0(DownloadShelfGtk, void, OnButtonClick);
 
   // The browser that owns this download shelf.
   Browser* browser_;
 
   // The top level widget of the shelf.
   scoped_ptr<SlideAnimatorGtk> slide_widget_;
 
   // |items_hbox_| holds the download items.
   OwnedWidgetGtk items_hbox_;
@@ skipping 18 matching lines @@
   bool is_showing_;
 
   // The download items we have added to our shelf.
   std::vector<DownloadItemGtk*> download_items_;
 
   // Gives us our colors and theme information.
   GtkThemeProvider* theme_provider_;
 
   NotificationRegistrar registrar_;
 
+  // True if the shelf will automatically close when the user mouses out.
+  bool close_on_mouse_out_;
+
+  // True if the mouse is within the shelf's bounds, as of the last mouse event
+  // we received.
+  bool mouse_in_shelf_;
+
+  ScopedRunnableMethodFactory<DownloadShelfGtk> auto_close_factory_;
+
   friend class DownloadItemGtk;
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_DOWNLOAD_SHELF_GTK_H_