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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_WM_DRAG_WINDOW_RESIZER_H_
#define ASH_WM_DRAG_WINDOW_RESIZER_H_
#include <memory>
#include "ash/ash_export.h"
#include "ash/wm/window_resizer.h"
#include "base/compiler_specific.h"
#include "base/gtest_prod_util.h"
#include "base/memory/weak_ptr.h"
#include "ui/gfx/geometry/point_f.h"
namespace ash {
class DragWindowController;
// DragWindowResizer is a decorator of WindowResizer and adds the ability to
// drag windows across displays.
class ASH_EXPORT DragWindowResizer : public WindowResizer {
public:
// Creates DragWindowResizer that adds the ability of dragging windows across
// displays to |next_window_resizer|.
DragWindowResizer(std::unique_ptr<WindowResizer> next_window_resizer,
WindowState* window_state);
DragWindowResizer(const DragWindowResizer&) = delete;
DragWindowResizer& operator=(const DragWindowResizer&) = delete;
~DragWindowResizer() override;
// WindowResizer:
void Drag(const gfx::PointF& location, int event_flags) override;
void CompleteDrag() override;
void RevertDrag() override;
void FlingOrSwipe(ui::GestureEvent* event) override;
private:
FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest, DragWindowController);
FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest,
DragWindowControllerLatchesTargetOpacity);
FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest,
DragWindowControllerAcrossThreeDisplays);
// Updates the bounds of the drag window for window dragging.
void UpdateDragWindow();
// Returns true if we should allow the mouse pointer to warp.
bool ShouldAllowMouseWarp();
// Do the real work of ending a drag. If the drag ends in a different display,
// move the dragged window to that display.
void EndDragImpl();
std::unique_ptr<WindowResizer> next_window_resizer_;
// Shows a semi-transparent image of the window being dragged.
std::unique_ptr<DragWindowController> drag_window_controller_;
gfx::PointF last_mouse_location_;
// Current instance for use by the DragWindowResizerTest.
static DragWindowResizer* instance_;
base::WeakPtrFactory<DragWindowResizer> weak_ptr_factory_{this};
};
} // namespace ash
#endif // ASH_WM_DRAG_WINDOW_RESIZER_H_
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