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