diff --git a/src/ui/close_event.h b/src/ui/close_event.h
index 521165172..20ac627e7 100644
--- a/src/ui/close_event.h
+++ b/src/ui/close_event.h
@@ -16,7 +16,12 @@ namespace ui {
   {
   public:
     CloseEvent(Component* source)
-      : Event(source) { }
+      : m_canceled(false), Event(source) { }
+    void cancel() { m_canceled = true; }
+    bool canceled() const { return m_canceled; }
+
+  private:
+    bool m_canceled;
   };
 
 } // namespace ui
diff --git a/src/ui/window.cpp b/src/ui/window.cpp
index 8ef052b2d..3da3d7389 100644
--- a/src/ui/window.cpp
+++ b/src/ui/window.cpp
@@ -325,12 +325,16 @@ void Window::openWindowInForeground()
 
 void Window::closeWindow(Widget* closer)
 {
+  // Close event
+  CloseEvent ev(closer);
+  onBeforeClose(ev);
+  if (ev.canceled())
+    return;
+
   m_closer = closer;
 
   manager()->_closeWindow(this, true);
 
-  // Close event
-  CloseEvent ev(closer);
   onClose(ev);
 }
 
diff --git a/src/ui/window.h b/src/ui/window.h
index 069264b9c..2da44dc30 100644
--- a/src/ui/window.h
+++ b/src/ui/window.h
@@ -65,6 +65,7 @@ namespace ui {
     virtual void onSetText() override;
 
     // New events
+    virtual void onBeforeClose(CloseEvent& ev) {}
     virtual void onClose(CloseEvent& ev);
     virtual void onHitTest(HitTestEvent& ev);
     virtual void onWindowResize();