Add a lock screen example.

ui/aura/window_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/desktop.h"
 #include "ui/aura/event.h"
@@ skipping 567 matching lines @@
 // entire bounds of the container. This test verifies that
 // GetEventHandlerForPoint() skips w12 even though its bounds contain the event,
 // because it has no children that can handle the event and it has no delegate
 // allowing it to handle the event itself.
 TEST_F(WindowTest, GetEventHandlerForPoint_NoDelegate) {
   WindowDelegateImpl d111;
   scoped_ptr<Window> w1(CreateTestWindowWithDelegate(NULL, 1,
       gfx::Rect(0, 0, 500, 500), NULL));
   scoped_ptr<Window> w11(CreateTestWindowWithDelegate(NULL, 11,
       gfx::Rect(0, 0, 500, 500), w1.get()));
-  scoped_ptr<Window> w111(CreateTestWindowWithDelegate(&d111, 1,
+  scoped_ptr<Window> w111(CreateTestWindowWithDelegate(&d111, 111,
       gfx::Rect(50, 50, 450, 450), w11.get()));
   scoped_ptr<Window> w12(CreateTestWindowWithDelegate(NULL, 12,
       gfx::Rect(0, 0, 500, 500), w1.get()));
 
   gfx::Point target_point = w111->bounds().CenterPoint();
   EXPECT_EQ(w111.get(), w1->GetEventHandlerForPoint(target_point));
 }
 
+// When set_consume_events() is called with |true| for a Window, that Window
+// should make sure that none behind it in the z-order see events if it has
+// children. If it does not have children, event targeting works as usual.
+TEST_F(WindowTest, ConsumesEvents) {
+  WindowDelegateImpl d11;
+  WindowDelegateImpl d121;
+  scoped_ptr<Window> w1(CreateTestWindowWithDelegate(NULL, 1,
+      gfx::Rect(0, 0, 500, 500), NULL));
+  scoped_ptr<Window> w11(CreateTestWindowWithDelegate(&d11, 11,
+      gfx::Rect(0, 0, 500, 500), w1.get()));
+  scoped_ptr<Window> w111(CreateTestWindowWithDelegate(NULL, 111,
+      gfx::Rect(50, 50, 450, 450), w11.get()));
+  scoped_ptr<Window> w12(CreateTestWindowWithDelegate(NULL, 12,
+      gfx::Rect(0, 0, 500, 500), w1.get()));
+  scoped_ptr<Window> w121(CreateTestWindowWithDelegate(&d121, 121,
+      gfx::Rect(150, 150, 50, 50), NULL));
+
+  w12->set_consumes_events(true);
+  EXPECT_EQ(w11.get(), w1->GetEventHandlerForPoint(gfx::Point(10, 10)));
+
+  w12->AddChild(w121.get());
+
+  EXPECT_EQ(NULL, w1->GetEventHandlerForPoint(gfx::Point(10, 10)));
+  EXPECT_EQ(w121.get(), w1->GetEventHandlerForPoint(gfx::Point(175, 175)));
+}
+
 }  // namespace internal
 }  // namespace aura