LibGUI: Add a GStackWidget for many widgets sharing a single location.

Call set_active_widget(GWidget*) to put a new widget on top.

1 files changed, 13 insertions, 0 deletions

diff --git a/LibGUI/GWidget.cpp b/LibGUI/GWidget.cpp
index f6e5e1568e..5a02ce2887 100644
--- a/LibGUI/GWidget.cpp
+++ b/LibGUI/GWidget.cpp
@@ -91,6 +91,8 @@ void GWidget::handle_paint_event(GPaintEvent& event)
     paint_event(event);
     for (auto* ch : children()) {
         auto* child = (GWidget*)ch;
+        if (!child->is_visible())
+            continue;
         if (child->relative_rect().intersects(event.rect())) {
             auto local_rect = event.rect();
             local_rect.intersect(child->relative_rect());
@@ -303,3 +305,14 @@ void GWidget::invalidate_layout()
         return;
     w->main_widget()->do_layout();
 }
+
+void GWidget::set_visible(bool visible)
+{
+    if (visible == m_visible)
+        return;
+    m_visible = visible;
+    if (auto* parent = parent_widget())
+        parent->invalidate_layout();
+    if (m_visible)
+        update();
+}