ash/system/tray/actionable_view.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 ASH_SYSTEM_TRAY_ACTIONABLE_VIEW_H_
   6 #define ASH_SYSTEM_TRAY_ACTIONABLE_VIEW_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "base/basictypes.h"
  10 #include "base/compiler_specific.h"
  11 #include "ui/views/view.h"
  12
  13 namespace ash {
  14
  15 // A focusable view that performs an action when user clicks on it, or presses
  16 // enter or space when focused. Note that the action is triggered on mouse-up,
  17 // instead of on mouse-down. So if user presses the mouse on the view, then
  18 // moves the mouse out of the view and then releases, then the action will not
  19 // be performed.
  20 // Exported for SystemTray.
  21 class ASH_EXPORT ActionableView : public views::View {
  22  public:
  23   static const char kViewClassName[];
  24
  25   ActionableView();
  26
  27   ~ActionableView() override;
  28
  29   void SetAccessibleName(const base::string16& name);
  30   const base::string16& accessible_name() const { return accessible_name_; }
  31
  32  protected:
  33   void OnPaintFocus(gfx::Canvas* canvas);
  34
  35   // Returns the bounds to paint the focus rectangle in.
  36   virtual gfx::Rect GetFocusBounds();
  37
  38   // Performs an action when user clicks on the view (on mouse-press event), or
  39   // presses a key when this view is in focus. Returns true if the event has
  40   // been handled and an action was performed. Returns false otherwise.
  41   virtual bool PerformAction(const ui::Event& event) = 0;
  42
  43   // Overridden from views::View.
  44   const char* GetClassName() const override;
  45   bool OnKeyPressed(const ui::KeyEvent& event) override;
  46   bool OnMousePressed(const ui::MouseEvent& event) override;
  47   void OnMouseReleased(const ui::MouseEvent& event) override;
  48   void OnMouseCaptureLost() override;
  49   void GetAccessibleState(ui::AXViewState* state) override;
  50   void OnPaint(gfx::Canvas* canvas) override;
  51   void OnFocus() override;
  52   void OnBlur() override;
  53
  54   // Overridden from ui::EventHandler.
  55   void OnGestureEvent(ui::GestureEvent* event) override;
  56
  57  private:
  58   base::string16 accessible_name_;
  59   bool has_capture_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(ActionableView);
  62 };
  63
  64 }  // namespace ash
  65
  66 #endif  // ASH_SYSTEM_TRAY_ACTIONABLE_VIEW_H_