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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // 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_CONTROLLER_H_
- #define ASH_WM_DRAG_WINDOW_CONTROLLER_H_
- #include <memory>
- #include <vector>
- #include "ash/ash_export.h"
- #include "base/gtest_prod_util.h"
- #include "third_party/abseil-cpp/absl/types/optional.h"
- #include "ui/gfx/geometry/rect.h"
- namespace aura {
- class Window;
- }
- namespace ui {
- class Shadow;
- }
- namespace ash {
- // Handles visuals for window dragging as it relates to multi-display support.
- // Phantom windows called "drag windows" represent the window on other displays.
- class ASH_EXPORT DragWindowController {
- public:
- DragWindowController(
- aura::Window* window,
- bool is_touch_dragging,
- const absl::optional<gfx::Rect>& shadow_bounds = absl::nullopt);
- DragWindowController(const DragWindowController&) = delete;
- DragWindowController& operator=(const DragWindowController&) = delete;
- virtual ~DragWindowController();
- // Updates bounds and opacity for the drag windows, and creates/destroys each
- // drag window so that it only exists when it would have nonzero opacity. Also
- // updates the opacity of the original window.
- void Update();
- private:
- class DragWindowDetails;
- FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest, DragWindowController);
- FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest,
- DragWindowControllerAcrossThreeDisplays);
- FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest,
- DragWindowControllerWithCustomShadowBounds);
- // Returns the currently active drag windows.
- int GetDragWindowsCountForTest() const;
- // Returns the drag window/layer owner for given index of the
- // currently active drag windows list.
- const aura::Window* GetDragWindowForTest(size_t index) const;
- const ui::Shadow* GetDragWindowShadowForTest(size_t index) const;
- // Call Layer::OnPaintLayer on all layers under the drag_windows_.
- void RequestLayerPaintForTest();
- // The original window.
- aura::Window* window_;
- // Indicates touch dragging, as opposed to mouse dragging.
- const bool is_touch_dragging_;
- // Used if the drag windows may need their shadows adjusted.
- const absl::optional<gfx::Rect> shadow_bounds_;
- // |window_|'s opacity before the drag. Used to revert opacity after the drag.
- const float old_opacity_;
- // Phantom windows to visually represent |window_| on other displays.
- std::vector<std::unique_ptr<DragWindowDetails>> drag_windows_;
- };
- } // namespace ash
- #endif // ASH_WM_DRAG_WINDOW_CONTROLLER_H_
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