chrome/browser/ui/views/message_center/message_center_widget_delegate.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_VIEWS_MESSAGE_CENTER_MESSAGE_CENTER_WIDGET_DELEGATE_H_
   6 #define CHROME_BROWSER_UI_VIEWS_MESSAGE_CENTER_MESSAGE_CENTER_WIDGET_DELEGATE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "ui/gfx/point.h"
  12 #include "ui/gfx/rect.h"
  13 #include "ui/message_center/message_center.h"
  14 #include "ui/message_center/message_center_tray.h"
  15 #include "ui/message_center/message_center_tray_delegate.h"
  16 #include "ui/message_center/views/message_center_view.h"
  17 #include "ui/views/widget/widget_delegate.h"
  18 #include "ui/views/widget/widget_observer.h"
  19
  20 namespace message_center {
  21
  22 enum Alignment {
  23   ALIGNMENT_TOP = 1 << 0,
  24   ALIGNMENT_LEFT = 1 << 1,
  25   ALIGNMENT_BOTTOM = 1 << 2,
  26   ALIGNMENT_RIGHT = 1 << 3,
  27   ALIGNMENT_NONE = 1 << 4,
  28 };
  29
  30 struct PositionInfo {
  31   int max_height;
  32
  33   // Alignment of the message center relative to the center of the screen.
  34   Alignment message_center_alignment;
  35
  36   // Alignment of the taskbar relative to the center of the screen.
  37   Alignment taskbar_alignment;
  38
  39   // Point relative to which message center is positioned.
  40   gfx::Point inital_anchor_point;
  41 };
  42
  43 class WebNotificationTray;
  44 class MessageCenterFrameView;
  45
  46 // MessageCenterWidgetDelegate is the message center's client view. It also
  47 // creates the message center widget and sets the notifications.
  48 //
  49 ////////////////////////////////////////////////////////////////////////////////
  50 class MessageCenterWidgetDelegate : public views::WidgetDelegate,
  51                                     public message_center::MessageCenterView,
  52                                     public views::WidgetObserver {
  53  public:
  54   MessageCenterWidgetDelegate(WebNotificationTray* tray,
  55                               MessageCenterTray* mc_tray,
  56                               bool initially_settings_visible,
  57                               const PositionInfo& pos_info);
  58   virtual ~MessageCenterWidgetDelegate();
  59
  60   // WidgetDelegate overrides:
  61   virtual View* GetContentsView() OVERRIDE;
  62   virtual views::NonClientFrameView* CreateNonClientFrameView(
  63       views::Widget* widget) OVERRIDE;
  64   virtual void DeleteDelegate() OVERRIDE;
  65   virtual views::Widget* GetWidget() OVERRIDE;
  66   virtual const views::Widget* GetWidget() const OVERRIDE;
  67
  68   // WidgetObserver overrides:
  69   virtual void OnWidgetActivationChanged(views::Widget* widget,
  70                                          bool active) OVERRIDE;
  71   virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
  72
  73   // View overrides:
  74   virtual void PreferredSizeChanged() OVERRIDE;
  75   virtual gfx::Size GetPreferredSize() const OVERRIDE;
  76   virtual gfx::Size GetMaximumSize() OVERRIDE;
  77   virtual int GetHeightForWidth(int width) const OVERRIDE;
  78   virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
  79
  80  private:
  81   // Creates and initializes the message center widget.
  82   void InitWidget();
  83
  84   // Shifts the message center anchor point such that the mouse click point is
  85   // along the middle 60% of the width of the message center if taskbar is
  86   // horizontal aligned. If vertically aligned, ensures that mouse click point
  87   // is along the height of the message center (at least at a corner).
  88   gfx::Point GetCorrectedAnchor(gfx::Size calculated_size);
  89
  90   // Calculates the message center bounds using the position info and the
  91   // corrected anchor.
  92   gfx::Rect GetMessageCenterBounds();
  93
  94   // Insets of the message center border (set in MessageCenterFrameView).
  95   gfx::Insets border_insets_;
  96
  97   // Info necessary to calculate the estimated position of the message center.
  98   PositionInfo pos_info_;
  99
 100   WebNotificationTray* tray_;
 101 };
 102
 103 }  // namespace message_center
 104
 105 #endif  // CHROME_BROWSER_UI_VIEWS_MESSAGE_CENTER_MESSAGE_CENTER_WIDGET_DELEGATE_H_