| // 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 "ash/ash_export.h" |
| #include "base/basictypes.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "ui/gfx/display.h" |
| #include "ui/gfx/rect.h" |
| |
| namespace aura { |
| class Window; |
| } |
| |
| namespace ui { |
| class Layer; |
| class LayerTreeOwner; |
| } |
| |
| namespace views { |
| class Widget; |
| } |
| |
| namespace ash { |
| |
| // DragWindowController is responsible for showing a semi-transparent window |
| // while dragging a window across displays. |
| class ASH_EXPORT DragWindowController { |
| public: |
| explicit DragWindowController(aura::Window* window); |
| virtual ~DragWindowController(); |
| |
| // Sets the display where the window is placed after the window is dropped. |
| void SetDestinationDisplay(const gfx::Display& dst_display); |
| |
| // Shows the drag window at the specified location (coordinates of the |
| // parent). If |layer| is non-NULL, it is shown on top of the drag window. |
| // |layer| is owned by the caller. |
| // This does not immediately show the window. |
| void Show(); |
| |
| // Hides the drag window. |
| void Hide(); |
| |
| // This is used to set bounds for the drag window immediately. This should |
| // be called only when the drag window is already visible. |
| void SetBounds(const gfx::Rect& bounds); |
| |
| // Sets the opacity of the drag window. |
| void SetOpacity(float opacity); |
| |
| private: |
| FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest, DragWindowController); |
| |
| // Creates and shows the |drag_widget_| at |bounds|. |
| // |layer| is shown on top of the drag window if it is non-NULL. |
| // |layer| is not owned by this object. |
| void CreateDragWidget(const gfx::Rect& bounds); |
| |
| // Sets bounds of the drag window. The window is shown on |dst_display_| |
| // if its id() is valid. Otherwise, a display nearest to |bounds| is chosen. |
| void SetBoundsInternal(const gfx::Rect& bounds); |
| |
| // Recreates a fresh layer for |window_| and all its child windows. |
| void RecreateWindowLayers(); |
| |
| // Window the drag window is placed beneath. |
| aura::Window* window_; |
| |
| // The display where the drag is placed. When dst_display_.id() is |
| // kInvalidDisplayID (i.e. the default), a display nearest to the current |
| // |bounds_| is automatically used. |
| gfx::Display dst_display_; |
| |
| // Initially the bounds of |window_|. Each time Show() is invoked |
| // |start_bounds_| is then reset to the bounds of |drag_widget_| and |
| // |bounds_| is set to the value passed into Show(). The animation animates |
| // between these two values. |
| gfx::Rect bounds_; |
| |
| views::Widget* drag_widget_; |
| |
| // The copy of window_->layer() and its descendants. |
| scoped_ptr<ui::LayerTreeOwner> layer_owner_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DragWindowController); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_DRAG_WINDOW_CONTROLLER_H_ |