GUI: Add method to know if a widget contains a given widget

1 files changed, 13 insertions, 0 deletions

diff --git a/gui/widget.cpp b/gui/widget.cpp
index 850fad0e5f..4b84e19c09 100644
--- a/gui/widget.cpp
+++ b/gui/widget.cpp
@@ -175,6 +175,15 @@ Widget *Widget::findWidgetInChain(Widget *w, const char *name) {
 	return 0;
 }
 
+bool Widget::containsWidgetInChain(Widget *w, Widget *search) {
+	while (w) {
+		if (w == search || w->containsWidget(search))
+			return true;
+		w = w->_next;
+	}
+	return false;
+}
+
 void Widget::setEnabled(bool e) {
 	if ((_flags & WIDGET_ENABLED) != e) {
 		if (e)
@@ -837,6 +846,10 @@ ContainerWidget::~ContainerWidget() {
 	}
 }
 
+bool ContainerWidget::containsWidget(Widget *w) const {
+	return containsWidgetInChain(_firstWidget, w);
+}
+
 Widget *ContainerWidget::findWidget(int x, int y) {
 	return findWidgetInChain(_firstWidget, x, y);
 }