libdeng2|Widgets: Root widget keeps track of the focus widget

skyjake · Jan 23, 2013 · c5c5e3e · c5c5e3e
1 parent c698657
commit c5c5e3e
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Showing 2 changed files with 25 additions and 1 deletion.
diff --git a/doomsday/libdeng2/include/de/widgets/rootwidget.h b/doomsday/libdeng2/include/de/widgets/rootwidget.h
@@ -59,6 +59,19 @@ class RootWidget : public Widget
      */
     virtual void setViewSize(Vector2i const &viewSize);
 
+    /**
+     * Sets the focus widget. It is the first widget to be offered input
+     * events.
+     *
+     * @param widget  Widget to have focus. Set to @c NULL to clear focus.
+     */
+    void setFocus(Widget *widget);
+
+    /**
+     * Returns the current focus widget.
+     */
+    Widget *focus() const;
+
     void initialize();
     void draw();
 

diff --git a/doomsday/libdeng2/src/widgets/rootwidget.cpp b/doomsday/libdeng2/src/widgets/rootwidget.cpp
@@ -27,8 +27,9 @@ namespace de {
 struct RootWidget::Instance
 {
     RectangleRule *viewRect;
+    Widget *focus;
 
-    Instance()
+    Instance() : focus(0)
     {
         viewRect = new RectangleRule(
                     refless(new ConstantRule(0)),
@@ -90,6 +91,16 @@ void RootWidget::setViewSize(Vector2i const &size)
     notifyTree(&Widget::viewResized);
 }
 
+void RootWidget::setFocus(Widget *widget)
+{
+    d->focus = widget;
+}
+
+Widget *RootWidget::focus() const
+{
+    return d->focus;
+}
+
 Rule const *RootWidget::viewWidth() const
 {
     return d->viewRect->right();