| // 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_PANELS_PANEL_WINDOW_RESIZER_H_ |
| #define ASH_WM_PANELS_PANEL_WINDOW_RESIZER_H_ |
| |
| #include "ash/wm/window_resizer.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/weak_ptr.h" |
| |
| namespace gfx { |
| class Rect; |
| class Point; |
| } |
| |
| namespace ash { |
| |
| // PanelWindowResizer is used by ToplevelWindowEventFilter to handle dragging, |
| // moving or resizing panel window. These can be attached and detached from the |
| // launcher. |
| class ASH_EXPORT PanelWindowResizer : public WindowResizer { |
| public: |
| ~PanelWindowResizer() override; |
| |
| // Creates a new PanelWindowResizer. The caller takes ownership of the |
| // returned object. The ownership of |next_window_resizer| is taken by the |
| // returned object. Returns NULL if not resizable. |
| static PanelWindowResizer* Create(WindowResizer* next_window_resizer, |
| wm::WindowState* window_state); |
| |
| // WindowResizer: |
| void Drag(const gfx::Point& location, int event_flags) override; |
| void CompleteDrag() override; |
| void RevertDrag() override; |
| |
| private: |
| // Creates PanelWindowResizer that adds the ability to attach / detach panel |
| // windows as well as reparenting them to the panel layer while dragging to |
| // |next_window_resizer|. This object takes ownership of |
| // |next_window_resizer|. |
| PanelWindowResizer(WindowResizer* next_window_resizer, |
| wm::WindowState* window_state); |
| |
| // Checks if the provided window bounds should attach to the launcher. If true |
| // the offset gives the necessary adjustment to snap to the launcher. |
| bool AttachToLauncher(const gfx::Rect& bounds, gfx::Point* offset); |
| |
| // Tracks the panel's initial position and attachment at the start of a drag |
| // and informs the PanelLayoutManager that a drag has started if necessary. |
| void StartedDragging(); |
| |
| // Informs the PanelLayoutManager that the drag is complete if it was informed |
| // of the drag start. |
| void FinishDragging(); |
| |
| // Updates the dragged panel's index in the launcher. |
| void UpdateLauncherPosition(); |
| |
| // Last pointer location in screen coordinates. |
| gfx::Point last_location_; |
| |
| // Wraps a window resizer and adds panel detaching / reattaching and snapping |
| // to launcher behavior during drags. |
| scoped_ptr<WindowResizer> next_window_resizer_; |
| |
| // Panel container window. |
| aura::Window* panel_container_; |
| aura::Window* initial_panel_container_; |
| |
| // Set to true once Drag() is invoked and the bounds of the window change. |
| bool did_move_or_resize_; |
| |
| // True if the window started attached to the launcher. |
| const bool was_attached_; |
| |
| base::WeakPtrFactory<PanelWindowResizer> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PanelWindowResizer); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_PANELS_PANEL_WINDOW_RESIZER_H_ |