Dispatch a synthetic mouse exit to the widget handling mouse events when a widget grabs capture

ui/views/widget/widget_interactive_uitest.cc

 // Copyright (c) 2013 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/bind.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
@@ skipping 848 matching lines @@
     EXPECT_TRUE(widget2.GetAndClearGotCaptureLost());
 
     // Release and verify no one has it.
     widget1.ReleaseCapture();
     EXPECT_FALSE(widget1.HasCapture());
     EXPECT_FALSE(widget2.HasCapture());
     EXPECT_TRUE(widget1.GetAndClearGotCaptureLost());
     EXPECT_FALSE(widget2.GetAndClearGotCaptureLost());
   }
 
- private:
   NativeWidget* CreateNativeWidget(bool create_desktop_native_widget,
                                    Widget* widget) {
 #if !defined(OS_CHROMEOS)
     if (create_desktop_native_widget)
       return new DesktopNativeWidgetAura(widget);
 #endif
     return NULL;
   }
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(WidgetCaptureTest);
 };
 
 // See description in TestCapture().
 TEST_F(WidgetCaptureTest, Capture) {
   TestCapture(false);
 }
 
 #if !defined(OS_LINUX)
 // See description in TestCapture(). Creates DesktopNativeWidget.
 TEST_F(WidgetCaptureTest, CaptureDesktopNativeWidget) {
   TestCapture(true);
 }
 #endif
 
 #if !defined(OS_CHROMEOS)
+// Test that a synthetic mouse exit is sent to the widget which was handling
+// mouse events when a different widget grabs capture.
+// TODO(pkotwicz): Make test pass on CrOS.

[sadrul, 2014/06/26 12:59:35]

I guess you need to create multiple WindowTreeHosts for the change in this CL

+TEST_F(WidgetCaptureTest, MouseExitOnCaptureGrab) {
+  Widget widget1;
+  Widget::InitParams params1 =
+      CreateParams(Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  params1.native_widget = CreateNativeWidget(true, &widget1);
+  params1.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  widget1.Init(params1);
+  MouseView* mouse_view1 = new MouseView;
+  widget1.SetContentsView(mouse_view1);
+  widget1.Show();
+  widget1.SetBounds(gfx::Rect(300, 300));
+
+  Widget widget2;
+  Widget::InitParams params2 =
+      CreateParams(Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  params2.native_widget = CreateNativeWidget(true, &widget2);
+  params2.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  widget2.Init(params2);
+  widget2.Show();
+  widget2.SetBounds(gfx::Rect(400, 0, 300, 300));
+
+  ui::MouseEvent mouse_move_event(ui::ET_MOUSE_MOVED, gfx::Point(100, 100),
+      gfx::Point(100, 100), ui::EF_NONE, ui::EF_NONE);
+  ui::EventDispatchDetails details = widget1.GetNativeWindow()->GetHost()->
+      event_processor()->OnEventFromSource(&mouse_move_event);
+  ASSERT_FALSE(details.dispatcher_destroyed);
+  EXPECT_EQ(1, mouse_view1->EnteredCalls());
+  EXPECT_EQ(0, mouse_view1->ExitedCalls());
+
+  widget2.SetCapture(NULL);
+  EXPECT_EQ(0, mouse_view1->EnteredCalls());
+  // Grabbing native capture on Windows generates a ui::ET_MOUSE_EXITED event
+  // in addition to the one generated by Chrome.
+  EXPECT_LT(0, mouse_view1->ExitedCalls());
+}
+#endif
+
+#if !defined(OS_CHROMEOS)
 namespace {
 
 // Used to veirfy OnMouseEvent() has been invoked.
 class MouseEventTrackingWidget : public Widget {
  public:
   MouseEventTrackingWidget() : got_mouse_event_(false) {}
   virtual ~MouseEventTrackingWidget() {}
 
   bool GetAndClearGotMouseEvent() {
     bool value = got_mouse_event_;
@@ skipping 57 matching lines @@
   ui::EventDispatchDetails details = widget1.GetNativeWindow()->
       GetHost()->event_processor()->OnEventFromSource(&mouse_event);
   ASSERT_FALSE(details.dispatcher_destroyed);
   EXPECT_TRUE(widget1.GetAndClearGotMouseEvent());
   EXPECT_FALSE(widget2.GetAndClearGotMouseEvent());
 }
 #endif
 
 }  // namespace test
 }  // namespace views