ui/views/bubble/tray_bubble_view.h

   1 // Copyright (c) 2012 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 UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_
   6 #define UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/views/bubble/bubble_delegate.h"
  10 #include "ui/views/mouse_watcher.h"
  11 #include "ui/views/views_export.h"
  12
  13 // Specialized bubble view for bubbles associated with a tray icon (e.g. the
  14 // Ash status area). Mostly this handles custom anchor location and arrow and
  15 // border rendering. This also has its own delegate for handling mouse events
  16 // and other implementation specific details.
  17
  18 namespace ui {
  19 class LocatedEvent;
  20 }
  21
  22 namespace views {
  23 class View;
  24 class Widget;
  25 }
  26
  27 namespace views {
  28
  29 namespace internal {
  30 class TrayBubbleBorder;
  31 class TrayBubbleContentMask;
  32 }
  33
  34 class VIEWS_EXPORT TrayBubbleView : public views::BubbleDelegateView,
  35                                     public views::MouseWatcherListener {
  36  public:
  37   // AnchorType differentiates between bubbles that are anchored on a tray
  38   // element (ANCHOR_TYPE_TRAY) and display an arrow, or that are floating on
  39   // the screen away from the tray (ANCHOR_TYPE_BUBBLE).
  40   enum AnchorType {
  41     ANCHOR_TYPE_TRAY,
  42     ANCHOR_TYPE_BUBBLE,
  43   };
  44
  45   // AnchorAlignment determines to which side of the anchor the bubble will
  46   // align itself.
  47   enum AnchorAlignment {
  48     ANCHOR_ALIGNMENT_BOTTOM,
  49     ANCHOR_ALIGNMENT_LEFT,
  50     ANCHOR_ALIGNMENT_RIGHT,
  51     ANCHOR_ALIGNMENT_TOP
  52   };
  53
  54   class VIEWS_EXPORT Delegate {
  55    public:
  56     typedef TrayBubbleView::AnchorType AnchorType;
  57     typedef TrayBubbleView::AnchorAlignment AnchorAlignment;
  58
  59     Delegate() {}
  60     virtual ~Delegate() {}
  61
  62     // Called when the view is destroyed. Any pointers to the view should be
  63     // cleared when this gets called.
  64     virtual void BubbleViewDestroyed() = 0;
  65
  66     // Called when the mouse enters/exits the view.
  67     // Note: This event will only be called if the mouse gets actively moved by
  68     // the user to enter the view.
  69     virtual void OnMouseEnteredView() = 0;
  70     virtual void OnMouseExitedView() = 0;
  71
  72     // Called from GetAccessibleState(); should return the appropriate
  73     // accessible name for the bubble.
  74     virtual base::string16 GetAccessibleNameForBubble() = 0;
  75
  76     // Passes responsibility for BubbleDelegateView::GetAnchorRect to the
  77     // delegate.
  78     virtual gfx::Rect GetAnchorRect(
  79         views::Widget* anchor_widget,
  80         AnchorType anchor_type,
  81         AnchorAlignment anchor_alignment) const = 0;
  82
  83     // Called when a bubble wants to hide/destroy itself (e.g. last visible
  84     // child view was closed).
  85     virtual void HideBubble(const TrayBubbleView* bubble_view) = 0;
  86
  87    private:
  88     DISALLOW_COPY_AND_ASSIGN(Delegate);
  89   };
  90
  91   struct VIEWS_EXPORT InitParams {
  92     static const int kArrowDefaultOffset;
  93
  94     InitParams(AnchorType anchor_type,
  95                AnchorAlignment anchor_alignment,
  96                int min_width,
  97                int max_width);
  98     AnchorType anchor_type;
  99     AnchorAlignment anchor_alignment;
 100     int min_width;
 101     int max_width;
 102     int max_height;
 103     bool can_activate;
 104     bool close_on_deactivate;
 105     SkColor arrow_color;
 106     bool first_item_has_no_margin;
 107     views::BubbleBorder::Arrow arrow;
 108     int arrow_offset;
 109     views::BubbleBorder::ArrowPaintType arrow_paint_type;
 110     views::BubbleBorder::Shadow shadow;
 111     views::BubbleBorder::BubbleAlignment arrow_alignment;
 112   };
 113
 114   // Constructs and returns a TrayBubbleView. init_params may be modified.
 115   static TrayBubbleView* Create(gfx::NativeView parent_window,
 116                                 views::View* anchor,
 117                                 Delegate* delegate,
 118                                 InitParams* init_params);
 119
 120   ~TrayBubbleView() override;
 121
 122   // Sets up animations, and show the bubble. Must occur after CreateBubble()
 123   // is called.
 124   void InitializeAndShowBubble();
 125
 126   // Called whenever the bubble size or location may have changed.
 127   void UpdateBubble();
 128
 129   // Sets the maximum bubble height and resizes the bubble.
 130   void SetMaxHeight(int height);
 131
 132   // Sets the bubble width.
 133   void SetWidth(int width);
 134
 135   // Sets whether or not to paint the bubble border arrow.
 136   void SetArrowPaintType(views::BubbleBorder::ArrowPaintType arrow_paint_type);
 137
 138   // Returns the border insets. Called by TrayEventFilter.
 139   gfx::Insets GetBorderInsets() const;
 140
 141   // Called when the delegate is destroyed.
 142   void reset_delegate() { delegate_ = NULL; }
 143
 144   Delegate* delegate() { return delegate_; }
 145
 146   void set_gesture_dragging(bool dragging) { is_gesture_dragging_ = dragging; }
 147   bool is_gesture_dragging() const { return is_gesture_dragging_; }
 148
 149   // Overridden from views::WidgetDelegate.
 150   bool CanActivate() const override;
 151   views::NonClientFrameView* CreateNonClientFrameView(
 152       views::Widget* widget) override;
 153   bool WidgetHasHitTestMask() const override;
 154   void GetWidgetHitTestMask(gfx::Path* mask) const override;
 155
 156   // Overridden from views::BubbleDelegateView.
 157   gfx::Rect GetAnchorRect() const override;
 158
 159   // Overridden from views::View.
 160   gfx::Size GetPreferredSize() const override;
 161   gfx::Size GetMaximumSize() const override;
 162   int GetHeightForWidth(int width) const override;
 163   void OnMouseEntered(const ui::MouseEvent& event) override;
 164   void OnMouseExited(const ui::MouseEvent& event) override;
 165   void GetAccessibleState(ui::AXViewState* state) override;
 166
 167   // Overridden from MouseWatcherListener
 168   void MouseMovedOutOfHost() override;
 169
 170  protected:
 171   TrayBubbleView(gfx::NativeView parent_window,
 172                  views::View* anchor,
 173                  Delegate* delegate,
 174                  const InitParams& init_params);
 175
 176   // Overridden from views::BubbleDelegateView.
 177   void Init() override;
 178
 179   // Overridden from views::View.
 180   void ChildPreferredSizeChanged(View* child) override;
 181   void ViewHierarchyChanged(
 182       const ViewHierarchyChangedDetails& details) override;
 183
 184  private:
 185   InitParams params_;
 186   Delegate* delegate_;
 187   int preferred_width_;
 188   internal::TrayBubbleBorder* bubble_border_;
 189   scoped_ptr<internal::TrayBubbleContentMask> bubble_content_mask_;
 190   bool is_gesture_dragging_;
 191
 192   // True once the mouse cursor was actively moved by the user over the bubble.
 193   // Only then the OnMouseExitedView() event will get passed on to listeners.
 194   bool mouse_actively_entered_;
 195
 196   // Used to find any mouse movements.
 197   scoped_ptr<MouseWatcher> mouse_watcher_;
 198
 199   DISALLOW_COPY_AND_ASSIGN(TrayBubbleView);
 200 };
 201
 202 }  // namespace views
 203
 204 #endif  // UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_