1 // Copyright (c) 2012 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_PANELS_PANEL_LAYOUT_MANAGER_H_ 6 #define ASH_WM_PANELS_PANEL_LAYOUT_MANAGER_H_ 7 8 #include <list> 9 10 #include "ash/ash_export.h" 11 #include "ash/display/display_controller.h" 12 #include "ash/shelf/shelf_icon_observer.h" 13 #include "ash/shelf/shelf_layout_manager_observer.h" 14 #include "ash/shell_observer.h" 15 #include "ash/wm/window_state_observer.h" 16 #include "base/basictypes.h" 17 #include "base/compiler_specific.h" 18 #include "base/memory/scoped_ptr.h" 19 #include "base/memory/weak_ptr.h" 20 #include "ui/aura/layout_manager.h" 21 #include "ui/aura/window_observer.h" 22 #include "ui/keyboard/keyboard_controller.h" 23 #include "ui/keyboard/keyboard_controller_observer.h" 24 #include "ui/wm/public/activation_change_observer.h" 25 26 namespace aura { 27 class Window; 28 class WindowTracker; 29 } 30 31 namespace gfx { 32 class Rect; 33 } 34 35 namespace views { 36 class Widget; 37 } 38 39 namespace ash { 40 class PanelCalloutWidget; 41 class Shelf; 42 class ShelfLayoutManager; 43 44 // PanelLayoutManager is responsible for organizing panels within the 45 // workspace. It is associated with a specific container window (i.e. 46 // kShellWindowId_PanelContainer) and controls the layout of any windows 47 // added to that container. 48 // 49 // The constructor takes a |panel_container| argument which is expected to set 50 // its layout manager to this instance, e.g.: 51 // panel_container->SetLayoutManager(new PanelLayoutManager(panel_container)); 52 53 class ASH_EXPORT PanelLayoutManager 54 : public aura::LayoutManager, 55 public ShelfIconObserver, 56 public ShellObserver, 57 public aura::WindowObserver, 58 public wm::WindowStateObserver, 59 public aura::client::ActivationChangeObserver, 60 public keyboard::KeyboardControllerObserver, 61 public DisplayController::Observer, 62 public ShelfLayoutManagerObserver { 63 public: 64 explicit PanelLayoutManager(aura::Window* panel_container); 65 virtual ~PanelLayoutManager(); 66 67 // Call Shutdown() before deleting children of panel_container. 68 void Shutdown(); 69 70 void StartDragging(aura::Window* panel); 71 void FinishDragging(); 72 73 void ToggleMinimize(aura::Window* panel); 74 75 // Hide / Show the panel callout widgets. 76 void SetShowCalloutWidgets(bool show); 77 78 // Returns the callout widget (arrow) for |panel|. 79 views::Widget* GetCalloutWidgetForPanel(aura::Window* panel); 80 81 Shelf* shelf() { return shelf_; } 82 void SetShelf(Shelf* shelf); 83 84 // Overridden from aura::LayoutManager: 85 virtual void OnWindowResized() OVERRIDE; 86 virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE; 87 virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE; 88 virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE; 89 virtual void OnChildWindowVisibilityChanged(aura::Window* child, 90 bool visibile) OVERRIDE; 91 virtual void SetChildBounds(aura::Window* child, 92 const gfx::Rect& requested_bounds) OVERRIDE; 93 94 // Overridden from ShelfIconObserver 95 virtual void OnShelfIconPositionsChanged() OVERRIDE; 96 97 // Overridden from ShellObserver 98 virtual void OnShelfAlignmentChanged(aura::Window* root_window) OVERRIDE; 99 100 // Overridden from aura::WindowObserver 101 virtual void OnWindowPropertyChanged(aura::Window* window, 102 const void* key, 103 intptr_t old) OVERRIDE; 104 105 // Overridden from ash::wm::WindowStateObserver 106 virtual void OnPostWindowStateTypeChange( 107 wm::WindowState* window_state, 108 wm::WindowStateType old_type) OVERRIDE; 109 110 // Overridden from aura::client::ActivationChangeObserver 111 virtual void OnWindowActivated(aura::Window* gained_active, 112 aura::Window* lost_active) OVERRIDE; 113 114 // Overridden from DisplayController::Observer 115 virtual void OnDisplayConfigurationChanged() OVERRIDE; 116 117 // Overridden from ShelfLayoutManagerObserver 118 virtual void WillChangeVisibilityState( 119 ShelfVisibilityState new_state) OVERRIDE; 120 121 private: 122 friend class PanelLayoutManagerTest; 123 friend class PanelWindowResizerTest; 124 friend class DockedWindowResizerTest; 125 friend class DockedWindowLayoutManagerTest; 126 friend class WorkspaceControllerTest; 127 128 views::Widget* CreateCalloutWidget(); 129 130 struct PanelInfo{ 131 PanelInfo() : window(NULL), callout_widget(NULL), slide_in(false) {} 132 133 bool operator==(const aura::Window* other_window) const { 134 return window == other_window; 135 } 136 137 // A weak pointer to the panel window. 138 aura::Window* window; 139 // The callout widget for this panel. This pointer must be managed 140 // manually as this structure is used in a std::list. See 141 // http://www.chromium.org/developers/smart-pointer-guidelines 142 PanelCalloutWidget* callout_widget; 143 144 // True on new and restored panel windows until the panel has been 145 // positioned. The first time Relayout is called the panel will be shown, 146 // and slide into position and this will be set to false. 147 bool slide_in; 148 }; 149 150 typedef std::list<PanelInfo> PanelList; 151 152 void MinimizePanel(aura::Window* panel); 153 void RestorePanel(aura::Window* panel); 154 155 // Called whenever the panel layout might change. 156 void Relayout(); 157 158 // Called whenever the panel stacking order needs to be updated (e.g. focus 159 // changes or a panel is moved). 160 void UpdateStacking(aura::Window* active_panel); 161 162 // Update the callout arrows for all managed panels. 163 void UpdateCallouts(); 164 165 // Overridden from keyboard::KeyboardControllerObserver: 166 virtual void OnKeyboardBoundsChanging( 167 const gfx::Rect& keyboard_bounds) OVERRIDE; 168 169 // Parent window associated with this layout manager. 170 aura::Window* panel_container_; 171 // Protect against recursive calls to OnWindowAddedToLayout(). 172 bool in_add_window_; 173 // Protect against recursive calls to Relayout(). 174 bool in_layout_; 175 // Indicates if the panel callout widget should be created. 176 bool show_callout_widgets_; 177 // Ordered list of unowned pointers to panel windows. 178 PanelList panel_windows_; 179 // The panel being dragged. 180 aura::Window* dragged_panel_; 181 // The shelf we are observing for shelf icon changes. 182 Shelf* shelf_; 183 // The shelf layout manager being observed for visibility changes. 184 ShelfLayoutManager* shelf_layout_manager_; 185 186 // When not NULL, the shelf is hidden (i.e. full screen) and this tracks the 187 // set of panel windows which have been temporarily hidden and need to be 188 // restored when the shelf becomes visible again. 189 scoped_ptr<aura::WindowTracker> restore_windows_on_shelf_visible_; 190 191 // The last active panel. Used to maintain stacking order even if no panels 192 // are currently focused. 193 aura::Window* last_active_panel_; 194 base::WeakPtrFactory<PanelLayoutManager> weak_factory_; 195 196 DISALLOW_COPY_AND_ASSIGN(PanelLayoutManager); 197 }; 198 199 } // namespace ash 200 201 #endif // ASH_WM_PANELS_PANEL_LAYOUT_MANAGER_H_ 202
