gtk: Hide the status bubble when the mouse nears it.

chrome/browser/gtk/status_bubble_gtk.h

 // Copyright (c) 2009 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_GTK_STATUS_BUBBLE_GTK_H_
 #define CHROME_BROWSER_GTK_STATUS_BUBBLE_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
 
+#include "base/gfx/point.h"
 #include "base/scoped_ptr.h"
 #include "base/task.h"
 #include "chrome/browser/status_bubble.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 #include "chrome/common/owned_widget_gtk.h"
 
 class GtkThemeProvider;
 class GURL;
 class Profile;
 
 // GTK implementation of StatusBubble. Unlike Windows, our status bubble
 // doesn't have the nice leave-the-window effect since we can't rely on the
 // window manager to not try to be "helpful" and center our popups, etc.
 // We therefore position it absolutely in a GtkFixed, that we don't own.
 class StatusBubbleGtk : public StatusBubble,
                         public NotificationObserver {
  public:
   explicit StatusBubbleGtk(Profile* profile);
   virtual ~StatusBubbleGtk();
 
+  bool flip_horizontally() const { return flip_horizontally_; }
+  int y_offset() const { return y_offset_; }
+
   // StatusBubble implementation.
   virtual void SetStatus(const std::wstring& status);
   virtual void SetURL(const GURL& url, const std::wstring& languages);
   virtual void Hide();
-  virtual void MouseMoved();
+  virtual void MouseMoved(const gfx::Point& location, bool left_content);
 
   // Called when the download shelf becomes visible or invisible.
   // This is used by to ensure that the status bubble does not obscure
   // the download shelf, when it is visible.
-  virtual void UpdateDownloadShelfVisibility(bool visible) { }
+  virtual void UpdateDownloadShelfVisibility(bool visible);
 
   // Overridden from NotificationObserver:
   void Observe(NotificationType type,
                const NotificationSource& source,
                const NotificationDetails& details);
 
   // Top of the widget hierarchy for a StatusBubble. This top level widget is
   // guarenteed to have its gtk_widget_name set to "status-bubble" for
   // identification.
   GtkWidget* widget() { return container_.get(); }
 
  private:
   // Sets the text of the label widget and controls visibility. (As contrasted
   // with setting the current status or URL text, which may be ignored for now).
   void SetStatusTextTo(const std::string& status_utf8);
 
   // Sets the status bubble's location in the parent GtkFixed, shows the widget
   // and makes sure that the status bubble has the highest z-order.
   void Show();
 
   // Sets an internal timer to hide the status bubble after a delay.
   void HideInASecond();
 
   // Builds the widgets, containers, etc.
   void InitWidgets();
 
   // Notification from the window that we should retheme ourself.
   void UserChangedTheme();
 
+  // Sets whether the bubble should be flipped horizontally and displayed on the
+  // opposite side of the tab contents.  Reshapes the container and queues a
+  // redraw if necessary.
+  void SetFlipHorizontally(bool flip_horizontally);
+
+  static gboolean HandleMotionNotifyThunk(GtkWidget* widget,
+                                          GdkEventMotion* event,
+                                          gpointer user_data) {
+    return reinterpret_cast<StatusBubbleGtk*>(user_data)->
+        HandleMotionNotify(event);
+  }
+  gboolean HandleMotionNotify(GdkEventMotion* event);
+
   NotificationRegistrar registrar_;
 
   // Provides colors.
   GtkThemeProvider* theme_provider_;
 
   // The toplevel event box.
   OwnedWidgetGtk container_;
 
+  // The GtkAlignment holding |label_|.
+  GtkWidget* padding_;
+
   // The GtkLabel holding the text.
   GtkWidget* label_;
 
   // The status text we want to display when there are no URLs to display.
   std::string status_text_;
 
   // The url we want to display when there is no status text to display.
   std::string url_text_;
 
   // A timer that hides our window after a delay.
   ScopedRunnableMethodFactory<StatusBubbleGtk> timer_factory_;
+
+  // Should the bubble be flipped horizontally (e.g. displayed on the right for
+  // an LTR language)?  We move the bubble to the other side of the tab contents
+  // rather than sliding it down when the download shelf is visible.
+  bool flip_horizontally_;
+
+  // Vertical offset used to hide the status bubble as the pointer nears it.
+  int y_offset_;
+
+  // If the download shelf is visible, do not obscure it.
+  bool download_shelf_is_visible_;
 };
 
 #endif  // CHROME_BROWSER_GTK_STATUS_BUBBLE_GTK_H_