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ui/views/widget/widget_delegate.h

Index: ui/views/widget/widget_delegate.h
diff --git a/ui/views/widget/widget_delegate.h b/ui/views/widget/widget_delegate.h
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--- a/ui/views/widget/widget_delegate.h
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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 UI_VIEWS_WIDGET_WIDGET_DELEGATE_H_
-#define UI_VIEWS_WIDGET_WIDGET_DELEGATE_H_
-
-#include <string>
-#include <vector>
-
-#include "ui/accessibility/ax_enums.h"
-#include "ui/base/ui_base_types.h"
-#include "ui/views/view.h"
-
-namespace gfx {
-class ImageSkia;
-class Rect;
-}
-
-namespace views {
-class BubbleDelegateView;
-class ClientView;
-class DialogDelegate;
-class NonClientFrameView;
-class View;
-class Widget;
-
-// Handles events on Widgets in context-specific ways.
-class VIEWS_EXPORT WidgetDelegate {
- public:
-  WidgetDelegate();
-
-  // Sets the return value of CanActivate(). Default is true.
-  void set_can_activate(bool can_activate) {
-    can_activate_ = can_activate;
-  }
-
-  // Called whenever the widget's position changes.
-  virtual void OnWidgetMove();
-
-  // Called with the display changes (color depth or resolution).
-  virtual void OnDisplayChanged();
-
-  // Called when the work area (the desktop area minus task bars,
-  // menu bars, etc.) changes in size.
-  virtual void OnWorkAreaChanged();
-
-  // Returns the view that should have the focus when the widget is shown.  If
-  // NULL no view is focused.
-  virtual View* GetInitiallyFocusedView();
-
-  virtual BubbleDelegateView* AsBubbleDelegate();
-  virtual DialogDelegate* AsDialogDelegate();
-
-  // Returns true if the window can be resized.
-  virtual bool CanResize() const;
-
-  // Returns true if the window can be maximized.
-  virtual bool CanMaximize() const;
-
-  // Returns true if the window can be minimized.
-  virtual bool CanMinimize() const;
-
-  // Returns true if the window can be activated.
-  virtual bool CanActivate() const;
-
-  // Returns the modal type that applies to the widget. Default is
-  // ui::MODAL_TYPE_NONE (not modal).
-  virtual ui::ModalType GetModalType() const;
-
-  virtual ui::AXRole GetAccessibleWindowRole() const;
-
-  // Returns the title to be read with screen readers.
-  virtual base::string16 GetAccessibleWindowTitle() const;
-
-  // Returns the text to be displayed in the window title.
-  virtual base::string16 GetWindowTitle() const;
-
-  // Returns true if the window should show a title in the title bar.
-  virtual bool ShouldShowWindowTitle() const;
-
-  // Returns true if the window should show a close button in the title bar.
-  virtual bool ShouldShowCloseButton() const;
-
-  // Returns true if the window should handle standard system commands, such as
-  // close, minimize, maximize.
-  virtual bool ShouldHandleSystemCommands() const;
-
-  // Returns the app icon for the window. On Windows, this is the ICON_BIG used
-  // in Alt-Tab list and Win7's taskbar.
-  virtual gfx::ImageSkia GetWindowAppIcon();
-
-  // Returns the icon to be displayed in the window.
-  virtual gfx::ImageSkia GetWindowIcon();
-
-  // Returns true if a window icon should be shown.
-  virtual bool ShouldShowWindowIcon() const;
-
-  // Execute a command in the window's controller. Returns true if the command
-  // was handled, false if it was not.
-  virtual bool ExecuteWindowsCommand(int command_id);
-
-  // Returns the window's name identifier. Used to identify this window for
-  // state restoration.
-  virtual std::string GetWindowName() const;
-
-  // Saves the window's bounds and "show" state. By default this uses the
-  // process' local state keyed by window name (See GetWindowName above). This
-  // behavior can be overridden to provide additional functionality.
-  virtual void SaveWindowPlacement(const gfx::Rect& bounds,
-                                   ui::WindowShowState show_state);
-
-  // Retrieves the window's bounds and "show" states.
-  // This behavior can be overridden to provide additional functionality.
-  virtual bool GetSavedWindowPlacement(const Widget* widget,
-                                       gfx::Rect* bounds,
-                                       ui::WindowShowState* show_state) const;
-
-  // Returns true if the window's size should be restored. If this is false,
-  // only the window's origin is restored and the window is given its
-  // preferred size.
-  // Default is true.
-  virtual bool ShouldRestoreWindowSize() const;
-
-  // Called when the window closes. The delegate MUST NOT delete itself during
-  // this call, since it can be called afterwards. See DeleteDelegate().
-  virtual void WindowClosing() {}
-
-  // Called when the window is destroyed. No events must be sent or received
-  // after this point. The delegate can use this opportunity to delete itself at
-  // this time if necessary.
-  virtual void DeleteDelegate() {}
-
-  // Called when the user begins/ends to change the bounds of the window.
-  virtual void OnWindowBeginUserBoundsChange() {}
-  virtual void OnWindowEndUserBoundsChange() {}
-
-  // Returns the Widget associated with this delegate.
-  virtual Widget* GetWidget() = 0;
-  virtual const Widget* GetWidget() const = 0;
-
-  // Returns the View that is contained within this Widget.
-  virtual View* GetContentsView();
-
-  // Called by the Widget to create the Client View used to host the contents
-  // of the widget.
-  virtual ClientView* CreateClientView(Widget* widget);
-
-  // Called by the Widget to create the NonClient Frame View for this widget.
-  // Return NULL to use the default one.
-  virtual NonClientFrameView* CreateNonClientFrameView(Widget* widget);
-
-  // Called by the Widget to create the overlay View for this widget. Return
-  // NULL for no overlay. The overlay View will fill the Widget and sit on top
-  // of the ClientView and NonClientFrameView (both visually and wrt click
-  // targeting).
-  virtual View* CreateOverlayView();
-
-  // Returns true if the window can be notified with the work area change.
-  // Otherwise, the work area change for the top window will be processed by
-  // the default window manager. In some cases, like panel, we would like to
-  // manage the positions by ourselves.
-  virtual bool WillProcessWorkAreaChange() const;
-
-  // Returns true if window has a hit-test mask.
-  virtual bool WidgetHasHitTestMask() const;
-
-  // Provides the hit-test mask if HasHitTestMask above returns true.
-  virtual void GetWidgetHitTestMask(gfx::Path* mask) const;
-
-  // Returns true if focus should advance to the top level widget when
-  // tab/shift-tab is hit and on the last/first focusable view. Default returns
-  // false, which means tab/shift-tab never advance to the top level Widget.
-  virtual bool ShouldAdvanceFocusToTopLevelWidget() const;
-
-  // Returns true if event handling should descend into |child|.
-  // |location| is in terms of the Window.
-  virtual bool ShouldDescendIntoChildForEventHandling(
-      gfx::NativeView child,
-      const gfx::Point& location);
-
-  // Populates |panes| with accessible panes in this window that can
-  // be cycled through with keyboard focus.
-  virtual void GetAccessiblePanes(std::vector<View*>* panes) {}
-
- protected:
-  virtual ~WidgetDelegate() {}
-
- private:
-  View* default_contents_view_;
-
-  bool can_activate_;
-
-  DISALLOW_COPY_AND_ASSIGN(WidgetDelegate);
-};
-
-// A WidgetDelegate implementation that is-a View. Used to override GetWidget()
-// to call View's GetWidget() for the common case where a WidgetDelegate
-// implementation is-a View. Note that WidgetDelegateView is not owned by
-// view's hierarchy and is expected to be deleted on DeleteDelegate call.
-class VIEWS_EXPORT WidgetDelegateView : public WidgetDelegate, public View {
- public:
-  WidgetDelegateView();
-  virtual ~WidgetDelegateView();
-
-  // Overridden from WidgetDelegate:
-  virtual void DeleteDelegate() override;
-  virtual Widget* GetWidget() override;
-  virtual const Widget* GetWidget() const override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(WidgetDelegateView);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_WIDGET_WIDGET_DELEGATE_H_