diff options
Diffstat (limited to 'views/widget/widget.h')
| -rw-r--r-- | views/widget/widget.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/views/widget/widget.h b/views/widget/widget.h index bc16530..99e706f 100644 --- a/views/widget/widget.h +++ b/views/widget/widget.h @@ -9,6 +9,7 @@ #include <stack> #include "base/memory/scoped_ptr.h" +#include "base/observer_list.h" #include "ui/base/accessibility/accessibility_types.h" #include "ui/gfx/native_widget_types.h" #include "ui/gfx/rect.h" @@ -89,6 +90,14 @@ class RootView; class Widget : public internal::NativeWidgetDelegate, public FocusTraversable { public: + // Observers can listen to various events on the Widgets. + class Observer { + public: + virtual void OnWidgetClosing(Widget* widget) {} + virtual void OnWidgetVisibilityChanged(Widget* widget, bool visible) {} + virtual void OnWidgetActivationChanged(Widget* widget, bool active) {} + }; + typedef std::set<Widget*> Widgets; enum FrameType { @@ -221,6 +230,11 @@ class Widget : public internal::NativeWidgetDelegate, // TYPE_WINDOW. gfx::NativeWindow GetNativeWindow() const; + // Add/remove observer. + void AddObserver(Observer* observer); + void RemoveObserver(Observer* observer); + bool HasObserver(Observer* observer); + // Returns the accelerator given a command id. Returns false if there is // no accelerator associated with a given id, which is a common condition. virtual bool GetAccelerator(int cmd_id, ui::Accelerator* accelerator); @@ -521,6 +535,7 @@ class Widget : public internal::NativeWidgetDelegate, virtual void OnNativeWidgetActivationChanged(bool active) OVERRIDE; virtual void OnNativeFocus(gfx::NativeView focused_view) OVERRIDE; virtual void OnNativeBlur(gfx::NativeView focused_view) OVERRIDE; + virtual void OnNativeWidgetVisibilityChanged(bool visible) OVERRIDE; virtual void OnNativeWidgetCreated() OVERRIDE; virtual void OnNativeWidgetDestroying() OVERRIDE; virtual void OnNativeWidgetDestroyed() OVERRIDE; @@ -591,6 +606,8 @@ class Widget : public internal::NativeWidgetDelegate, internal::NativeWidgetPrivate* native_widget_; + ObserverList<Observer> observers_; + // Non-owned pointer to the Widget's delegate. May be NULL if no delegate is // being used. WidgetDelegate* widget_delegate_; |