Adds UI components for desktop notifications, including balloon view classes ...

chrome/browser/views/notifications/balloon_view.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_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_
+#define CHROME_BROWSER_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_
+
+#include "app/gfx/path.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/browser/notifications/balloon.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/notification_service.h"
+#include "views/view.h"
+
+namespace views {
+class ButtonListener;
+class ImagePainter;
+class TextButton;
+class WidgetWin;
+}  // namespace views
+
+class BalloonViewHost;
+class NotificationDetails;
+class NotificationSource;
+class SlideAnimation;
+
+// A balloon view is the UI component for a desktop notification toasts.
+// It draws a border, and within the border an HTML renderer.
+class BalloonViewImpl : public BalloonView,
+                        public views::View,
+                        public NotificationObserver,
+                        public AnimationDelegate {
+ public:
+  BalloonViewImpl();
+  ~BalloonViewImpl();
+
+  // BalloonView interface.
+  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);
+  }
+
+  // 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.
+  // Populates |path| with the outline.
+  void GetContentsMask(const gfx::Rect& contents_rect, gfx::Path* path) const;
+
+  // Adjust the contents window size to be appropriate for the frame.
+  void SizeContentsWindow();
+
+  // Do the delayed close work.
+  void DelayedClose();
+
+  // The height of the balloon's shelf.
+  // The shelf is where is close button is located.
+  int GetShelfHeight() const;
+
+  // The width of the frame (not including any shadow).
+  int GetFrameWidth() const;
+
+  // The height of the frame (not including any shadow).
+  int GetTotalFrameHeight() const;
+
+  // The height of the part of the frame around the balloon.
+  int GetBalloonFrameHeight() const;
+
+  // Where the balloon contents should be placed with respect to the top left
+  // of the frame.
+  gfx::Point GetContentsOffset() const;
+
+  // Where the balloon contents should be in screen coordinates.
+  gfx::Rect GetContentsRectangle() const;
+
+  // Non-owned pointer to the balloon which owns this object.
+  Balloon* balloon_;
+
+  // The window that contains the frame of the notification.
+  // Pointer owned by the View subclass.
+  views::Widget* frame_container_;
+
+  // The window that contains the contents of the notification.
+  // Pointer owned by the View subclass.
+  views::Widget* html_container_;
+
+  // The renderer of the HTML contents. Pointer owned by the views hierarchy.
+  BalloonViewHost* html_contents_;
+
+  // The following factory is used to call methods at a later time.
+  ScopedRunnableMethodFactory<BalloonViewImpl> method_factory_;
+
+  // Image painters for the frame of the toast.
+  scoped_ptr<views::Painter> shelf_background_;
+  scoped_ptr<views::Painter> balloon_background_;
+
+  // Pointer to sub-view is owned by the View sub-class.
+  views::TextButton* close_button_;
+
+  // Listener for clicks on the close button.
+  scoped_ptr<views::ButtonListener> close_button_listener_;
+
+  // An animation to move the balloon on the screen as its position changes.
+  scoped_ptr<SlideAnimation> animation_;
+  gfx::Rect anim_frame_start_;
+  gfx::Rect anim_frame_end_;
+
+  NotificationRegistrar notification_registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(BalloonViewImpl);
+};
+
+#endif  // CHROME_BROWSER_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_