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 "base/strings/string16.h"
  12 #include "ui/gfx/geometry/point.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/message_center/message_center.h"
  15 #include "ui/message_center/message_center_tray.h"
  16 #include "ui/message_center/message_center_tray_delegate.h"
  17 #include "ui/message_center/views/message_center_view.h"
  18 #include "ui/views/widget/widget_delegate.h"
  19 #include "ui/views/widget/widget_observer.h"
  20
  21 namespace message_center {
  22
  23 enum Alignment {
  24   ALIGNMENT_TOP = 1 << 0,
  25   ALIGNMENT_LEFT = 1 << 1,
  26   ALIGNMENT_BOTTOM = 1 << 2,
  27   ALIGNMENT_RIGHT = 1 << 3,
  28   ALIGNMENT_NONE = 1 << 4,
  29 };
  30
  31 struct PositionInfo {
  32   int max_height;
  33
  34   // Alignment of the message center relative to the center of the screen.
  35   Alignment message_center_alignment;
  36
  37   // Alignment of the taskbar relative to the center of the screen.
  38   Alignment taskbar_alignment;
  39
  40   // Point relative to which message center is positioned.
  41   gfx::Point inital_anchor_point;
  42 };
  43
  44 class WebNotificationTray;
  45 class MessageCenterFrameView;
  46
  47 // MessageCenterWidgetDelegate is the message center's client view. It also
  48 // creates the message center widget and sets the notifications.
  49 //
  50 ////////////////////////////////////////////////////////////////////////////////
  51 class MessageCenterWidgetDelegate : public views::WidgetDelegate,
  52                                     public message_center::MessageCenterView,
  53                                     public views::WidgetObserver {
  54  public:
  55   MessageCenterWidgetDelegate(WebNotificationTray* tray,
  56                               MessageCenterTray* mc_tray,
  57                               bool initially_settings_visible,
  58                               const PositionInfo& pos_info,
  59                               const base::string16& title);
  60   ~MessageCenterWidgetDelegate() override;
  61
  62   // WidgetDelegate overrides:
  63   View* GetContentsView() override;
  64   views::NonClientFrameView* CreateNonClientFrameView(
  65       views::Widget* widget) override;
  66   void DeleteDelegate() override;
  67   views::Widget* GetWidget() override;
  68   const views::Widget* GetWidget() const override;
  69
  70   // WidgetObserver overrides:
  71   void OnWidgetActivationChanged(views::Widget* widget, bool active) override;
  72   void OnWidgetClosing(views::Widget* widget) override;
  73
  74   // View overrides:
  75   void PreferredSizeChanged() override;
  76   gfx::Size GetPreferredSize() const override;
  77   gfx::Size GetMaximumSize() const override;
  78   int GetHeightForWidth(int width) const override;
  79   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
  80
  81  private:
  82   // Creates and initializes the message center widget.
  83   void InitWidget();
  84
  85   // Shifts the message center anchor point such that the mouse click point is
  86   // along the middle 60% of the width of the message center if taskbar is
  87   // horizontal aligned. If vertically aligned, ensures that mouse click point
  88   // is along the height of the message center (at least at a corner).
  89   gfx::Point GetCorrectedAnchor(gfx::Size calculated_size);
  90
  91   // Calculates the message center bounds using the position info and the
  92   // corrected anchor.
  93   gfx::Rect GetMessageCenterBounds();
  94
  95   // Insets of the message center border (set in MessageCenterFrameView).
  96   gfx::Insets border_insets_;
  97
  98   // Info necessary to calculate the estimated position of the message center.
  99   PositionInfo pos_info_;
 100
 101   WebNotificationTray* tray_;
 102 };
 103
 104 }  // namespace message_center
 105
 106 #endif  // CHROME_BROWSER_UI_VIEWS_MESSAGE_CENTER_MESSAGE_CENTER_WIDGET_DELEGATE_H_