1 // Copyright (c) 2013 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_DOCK_DOCK_WINDOW_RESIZER_H_ 6 #define ASH_WM_DOCK_DOCK_WINDOW_RESIZER_H_ 7 8 #include "ash/wm/dock/dock_types.h" 9 #include "ash/wm/window_resizer.h" 10 #include "base/compiler_specific.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "base/memory/weak_ptr.h" 13 14 namespace gfx { 15 class Point; 16 class Rect; 17 } 18 19 namespace aura { 20 class RootWindow; 21 } 22 23 namespace ash { 24 namespace internal { 25 26 class DockedWindowLayoutManager; 27 28 // DockWindowResizer is used by ToplevelWindowEventFilter to handle dragging, 29 // moving or resizing of a window while it is docked to the side of a screen. 30 class ASH_EXPORT DockedWindowResizer : public WindowResizer { 31 public: 32 virtual ~DockedWindowResizer(); 33 34 // Creates a new DockWindowResizer. The caller takes ownership of the 35 // returned object. The ownership of |next_window_resizer| is taken by the 36 // returned object. Returns NULL if not resizable. 37 static DockedWindowResizer* Create(WindowResizer* next_window_resizer, 38 aura::Window* window, 39 const gfx::Point& location, 40 int window_component, 41 aura::client::WindowMoveSource source); 42 43 // WindowResizer: 44 virtual void Drag(const gfx::Point& location, int event_flags) OVERRIDE; 45 virtual void CompleteDrag(int event_flags) OVERRIDE; 46 virtual void RevertDrag() OVERRIDE; 47 virtual aura::Window* GetTarget() OVERRIDE; 48 virtual const gfx::Point& GetInitialLocation() const OVERRIDE; 49 50 private: 51 // Creates DockWindowResizer that adds the ability to attach / detach 52 // windows to / from the dock. This object takes ownership of 53 // |next_window_resizer|. 54 DockedWindowResizer(WindowResizer* next_window_resizer, 55 const Details& details); 56 57 // If the provided window bounds should snap to the side of a screen, 58 // returns the offset that gives the necessary adjustment to snap. 59 void MaybeSnapToEdge(const gfx::Rect& bounds, gfx::Point* offset); 60 61 // Tracks the window's initial position and attachment at the start of a drag 62 // and informs the DockLayoutManager that a drag has started if necessary. 63 void StartedDragging(); 64 65 // Informs the DockLayoutManager that the drag is complete if it was informed 66 // of the drag start. 67 void FinishedDragging(); 68 69 // Reparents dragged window as necessary to the docked container or back to 70 // workspace at the end of the drag. Calculates and returns action taken that 71 // can be reported in UMA stats. |is_resized| reports if the window is merely 72 // being resized rather than repositioned. |attached_panel| is necessary to 73 // avoid docking panels that have been attached to the launcher shelf at the 74 // end of the drag. 75 DockedAction MaybeReparentWindowOnDragCompletion(bool is_resized, 76 bool is_attached_panel); 77 78 const Details details_; 79 80 gfx::Point last_location_; 81 82 // Wraps a window resizer and adds detaching / reattaching during drags. 83 scoped_ptr<WindowResizer> next_window_resizer_; 84 85 // Dock container window. 86 internal::DockedWindowLayoutManager* dock_layout_; 87 internal::DockedWindowLayoutManager* initial_dock_layout_; 88 89 // Set to true once Drag() is invoked and the bounds of the window change. 90 bool did_move_or_resize_; 91 92 // Set to true if the window that is being dragged was docked before drag. 93 bool was_docked_; 94 95 // True if the dragged window is docked during the drag. 96 bool is_docked_; 97 98 // True if the dragged window had |bounds_changed_by_user| before the drag. 99 // Cleared whenever the target window gets dragged outside of the docked area. 100 bool was_bounds_changed_by_user_; 101 102 base::WeakPtrFactory<DockedWindowResizer> weak_ptr_factory_; 103 104 DISALLOW_COPY_AND_ASSIGN(DockedWindowResizer); 105 }; 106 107 } // namespace internal 108 } // namespace ash 109 110 #endif // ASH_WM_DOCK_DOCK_WINDOW_RESIZER_H_ 111