Desktop Notifications UI (for windows)

chrome/browser/notifications/balloon_view_win.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.
+
+// Draws the view for the balloons.
+
+#ifndef CHROME_BROWSER_NOTIFICATIONS_BALLOON_VIEW_H_
+#define CHROME_BROWSER_NOTIFICATIONS_BALLOON_VIEW_H_
+
+#include "app/slide_animation.h"
+#include "base/basictypes.h"
+#include "base/gfx/point.h"
+#include "base/gfx/rect.h"
+#include "base/gfx/size.h"
+#include "base/scoped_ptr.h"
+#include "base/task.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/notification_service.h"
+#include "views/view.h"
+
+namespace views {
+class WidgetWin;
+class ImagePainter;
+class TextButton;
+class ButtonListener;
+}  // namespace views
+
+class Balloon;
+class BalloonContents;
+class NotificationDetails;
+class NotificationSource;
+
+class SlideAnimation;
+
+class BalloonView : public views::View,
+                    public NotificationObserver,
+                    public AnimationDelegate {
+ public:
+  BalloonView();
+  ~BalloonView();
+  void Show(Balloon* balloon);
+  void RepositionToBalloon();
+  void Close();
+
+ private:
+  // Overridden from views::View.
+  virtual void Paint(gfx::Canvas* canvas);
+  virtual void DidChangeBounds(const gfx::Rect& previous,
+                               const gfx::Rect& current);
+  virtual gfx::Size GetPreferredSize() {
+    return gfx::Size(1000, 1000);
+  }
+
+  // Initialize the view, parented to |parent|, and show it.
+  void Init(HWND parent);
+
+  // NotificationObserver method.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  // AnimationDelegate method.
+  virtual void AnimationProgressed(const Animation* animation);
+
+  // How to mask the balloon contents to fit within the frame.
+  // The caller is responsible for deleting the returned object.
+  HRGN GetContentsMask(gfx::Rect& contents_rect) const;
+
+  // Adjust the contents window size to be appropriate for the frame.
+  void SizeContentsWindow();
+
+  // Do the delayed close work.
+  void DelayedClose();
+
+  // True after Init() has completed.
+  bool initialized_;
+
+  // The height of the balloon's shelf.
+  // The shelf is where is close button is located.
+  int shelf_height() const;
+
+  // The width of the frame (not including any shadow).
+  int frame_width() const;
+
+  // The height of the frame (not including any shadow).
+  int total_frame_height() const;
+
+  // The height of the part of the frame around the balloon.
+  int balloon_frame_height() const;
+
+  // Where the balloon contents should be placed with respect to the top left
+  // of the frame.
+  gfx::Point contents_offset() const;
+
+  // Where the balloon contents should be in screen coordinates.
+  gfx::Rect contents_rectangle() const;
+
+  // The associated balloon.
+  Balloon* balloon_;
+
+  // The window that contains the BalloonFrame.
+  views::WidgetWin* frame_container_;
+
+  // The window that contains the BalloonContents.
+  views::WidgetWin* html_container_;
+
+  // The html content renderer.
+  BalloonContents* html_contents_;
+
+  // The following factory is used to call methods at a later time.
+  ScopedRunnableMethodFactory<BalloonView> method_factory_;
+
+  scoped_ptr<views::ImagePainter> shelf_background_;
+  scoped_ptr<views::ImagePainter> balloon_background_;
+
+  views::TextButton* close_button_;
+  scoped_ptr<views::ButtonListener> close_button_listener_;
+
+  // An animation to move the balloon on the screen as the collection
+  // changes.
+  scoped_ptr<SlideAnimation> animation_;
+  gfx::Rect anim_frame_start_;
+  gfx::Rect anim_frame_end_;
+
+  NotificationRegistrar notification_registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(BalloonView);
+};
+
+#endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_VIEW_H_
+