LibGUI+Inspector: Highlight the currently remotely inspected widget

This patch adds a magenta rectangle around the currently inspected
widget. This allows you to browse an app's widget tree somewhat
visually using the Inspector. :^)

2 files changed, 18 insertions, 0 deletions

diff --git a/Libraries/LibGUI/Widget.cpp b/Libraries/LibGUI/Widget.cpp
index 08d2273f57..b225598d5a 100644
--- a/Libraries/LibGUI/Widget.cpp
+++ b/Libraries/LibGUI/Widget.cpp
@@ -240,6 +240,11 @@ void Widget::handle_paint_event(PaintEvent& event)
         return IterationDecision::Continue;
     });
     second_paint_event(event);
+
+    if (is_being_inspected()) {
+        Painter painter(*this);
+        painter.draw_rect(rect(), Color::Magenta);
+    }
 }
 
 void Widget::set_layout(NonnullRefPtr<Layout> layout)
@@ -763,4 +768,14 @@ Gfx::Palette Widget::palette() const
     return Gfx::Palette(*m_palette);
 }
 
+void Widget::did_begin_inspection()
+{
+    update();
+}
+
+void Widget::did_end_inspection()
+{
+    update();
+}
+
 }
diff --git a/Libraries/LibGUI/Widget.h b/Libraries/LibGUI/Widget.h
index b0e4b5e3cd..80d4f740cf 100644
--- a/Libraries/LibGUI/Widget.h
+++ b/Libraries/LibGUI/Widget.h
@@ -293,6 +293,9 @@ protected:
     virtual void drag_move_event(DragEvent&);
     virtual void drop_event(DropEvent&);
 
+    virtual void did_begin_inspection() override;
+    virtual void did_end_inspection() override;
+
 private:
     void handle_paint_event(PaintEvent&);
     void handle_resize_event(ResizeEvent&);