ui/views/controls/menu/menu_scroll_view_container.h

   1 // Copyright (c) 2011 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_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
   6 #define UI_VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
   7
   8 #include "ui/views/view.h"
   9 #include "ui/views/bubble/bubble_border.h"
  10 #include "ui/views/controls/menu/menu_types.h"
  11
  12 namespace views {
  13
  14 class SubmenuView;
  15
  16 // MenuScrollViewContainer contains the SubmenuView (through a MenuScrollView)
  17 // and two scroll buttons. The scroll buttons are only visible and enabled if
  18 // the preferred height of the SubmenuView is bigger than our bounds.
  19 class MenuScrollViewContainer : public View {
  20  public:
  21   explicit MenuScrollViewContainer(SubmenuView* content_view);
  22
  23   // Returns the buttons for scrolling up/down.
  24   View* scroll_down_button() const { return scroll_down_button_; }
  25   View* scroll_up_button() const { return scroll_up_button_; }
  26
  27   // External function to check if the bubble border is usd.
  28   bool HasBubbleBorder();
  29
  30   // Offsets the Arrow from the default location.
  31   void SetBubbleArrowOffset(int offset);
  32
  33   // View overrides.
  34   void OnPaintBackground(gfx::Canvas* canvas) override;
  35   void Layout() override;
  36   gfx::Size GetPreferredSize() const override;
  37   void GetAccessibleState(ui::AXViewState* state) override;
  38
  39  protected:
  40   // View override.
  41   void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
  42
  43  private:
  44   // Create the default border.
  45   void CreateDefaultBorder();
  46
  47   // Create the bubble border.
  48   void CreateBubbleBorder();
  49
  50   BubbleBorder::Arrow BubbleBorderTypeFromAnchor(MenuAnchorPosition anchor);
  51
  52   class MenuScrollView;
  53
  54   // The scroll buttons.
  55   View* scroll_up_button_;
  56   View* scroll_down_button_;
  57
  58   // The scroll view.
  59   MenuScrollView* scroll_view_;
  60
  61   // The content view.
  62   SubmenuView* content_view_;
  63
  64   // If set the currently set border is a bubble border.
  65   BubbleBorder::Arrow arrow_;
  66
  67   // Weak reference to the currently set border.
  68   BubbleBorder* bubble_border_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(MenuScrollViewContainer);
  71 };
  72
  73 }  // namespace views
  74
  75 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_