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 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   ~PartialScreenshotView() override;
  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   gfx::NativeCursor GetCursor(const ui::MouseEvent& event) override;
  52   void OnPaint(gfx::Canvas* canvas) override;
  53   bool OnMousePressed(const ui::MouseEvent& event) override;
  54   bool OnMouseDragged(const ui::MouseEvent& event) override;
  55   bool OnMouseWheel(const ui::MouseWheelEvent& event) override;
  56   void OnMouseReleased(const ui::MouseEvent& event) override;
  57   void OnMouseCaptureLost() override;
  58   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_