ash/wm/partial_screenshot_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 ASH_WM_PARTIAL_SCREENSHOT_VIEW_H_
   6 #define ASH_WM_PARTIAL_SCREENSHOT_VIEW_H_
   7
   8 #include <vector>
   9
  10 #include "ash/ash_export.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/gtest_prod_util.h"
  13 #include "ui/gfx/point.h"
  14 #include "ui/views/widget/widget_delegate.h"
  15
  16 namespace aura {
  17 class RootWindow;
  18 }
  19
  20 namespace ash {
  21 class ScreenshotDelegate;
  22
  23 // The view of taking partial screenshot, i.e.: drawing region
  24 // rectangles during drag, and changing the mouse cursor to indicate
  25 // the current mode.
  26 class ASH_EXPORT PartialScreenshotView : public views::WidgetDelegateView {
  27  public:
  28   // Starts the UI for taking partial screenshot; dragging to select a region.
  29   // PartialScreenshotViews manage their own lifetime so caller must not delete
  30   // the returned PartialScreenshotViews.
  31   static std::vector<PartialScreenshotView*>
  32       StartPartialScreenshot(ScreenshotDelegate* screenshot_delegate);
  33
  34  private:
  35   FRIEND_TEST_ALL_PREFIXES(PartialScreenshotViewTest, BasicMouse);
  36   FRIEND_TEST_ALL_PREFIXES(PartialScreenshotViewTest, BasicTouch);
  37
  38   class OverlayDelegate;
  39
  40   PartialScreenshotView(OverlayDelegate* overlay_delegate,
  41                         ScreenshotDelegate* screenshot_delegate);
  42   virtual ~PartialScreenshotView();
  43
  44   // Initializes partial screenshot UI widget for |root_window|.
  45   void Init(aura::RootWindow* root_window);
  46
  47   // Returns the currently selected region.
  48   gfx::Rect GetScreenshotRect() const;
  49
  50   void OnSelectionStarted(const gfx::Point& position);
  51   void OnSelectionChanged(const gfx::Point& position);
  52   void OnSelectionFinished();
  53
  54   // Overridden from views::View:
  55   virtual gfx::NativeCursor GetCursor(const ui::MouseEvent& event) OVERRIDE;
  56   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
  57   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
  58   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
  59   virtual bool OnMouseWheel(const ui::MouseWheelEvent& event) OVERRIDE;
  60   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
  61   virtual void OnMouseCaptureLost() OVERRIDE;
  62   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
  63
  64   bool is_dragging_;
  65   gfx::Point start_position_;
  66   gfx::Point current_position_;
  67
  68   // The delegate to receive Cancel. No ownership.
  69   OverlayDelegate* overlay_delegate_;
  70
  71   // ScreenshotDelegate to take the actual screenshot. No ownership.
  72   ScreenshotDelegate* screenshot_delegate_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(PartialScreenshotView);
  75 };
  76
  77 }  // namespace ash
  78
  79 #endif  // #ifndef ASH_WM_PARTIAL_SCREENSHOT_VIEW_H_