public void MouseDeviceCaptureTest()
{
Border child1 = new Border {
Background = Brushes.Transparent, Width = 100, Height = 100
};
Border child2 = new Border {
Background = Brushes.Transparent, Width = 100, Height = 100
};
Border child3 = new Border {
Background = Brushes.Transparent, Width = 100, Height = 100
};
StackPanel panel = new StackPanel {
IsRootElement = true
};
panel.Children.Add(child1);
panel.Children.Add(child2);
MouseEventArgs lastArgs = null;
panel.MouseMove += (sender, e) => lastArgs = e;
TestPresentationSource presentationSource = new TestPresentationSource();
presentationSource.RootElement = panel;
panel.Measure(Size.Infinity);
panel.Arrange(new Rect(panel.DesiredSize));
MouseDevice mouseDevice = new MouseDevice(presentationSource);
mouseDevice.Activate();
mouseDevice.ProcessRawEvent(new RawMouseEventArgs(new Point(50, 50), 0));
Assert.AreEqual(child1, lastArgs.Source);
Assert.AreEqual(child1, mouseDevice.HitTarget);
Assert.AreEqual(null, mouseDevice.CaptureTarget);
Assert.AreEqual(child1, mouseDevice.Target);
mouseDevice.ProcessRawEvent(new RawMouseEventArgs(new Point(50, 150), 0));
Assert.AreEqual(child2, lastArgs.Source);
Assert.AreEqual(child2, mouseDevice.HitTarget);
Assert.AreEqual(null, mouseDevice.CaptureTarget);
Assert.AreEqual(child2, mouseDevice.Target);
mouseDevice.Capture(child2);
mouseDevice.ProcessRawEvent(new RawMouseEventArgs(new Point(50, 50), 0));
Assert.AreEqual(child2, lastArgs.Source);
Assert.AreEqual(child1, mouseDevice.HitTarget);
Assert.AreEqual(child2, mouseDevice.CaptureTarget);
Assert.AreEqual(child2, mouseDevice.Target);
mouseDevice.ReleaseCapture();
mouseDevice.ProcessRawEvent(new RawMouseEventArgs(new Point(50, 50), 0));
Assert.AreEqual(child1, lastArgs.Source);
Assert.AreEqual(child1, mouseDevice.HitTarget);
Assert.AreEqual(null, mouseDevice.CaptureTarget);
Assert.AreEqual(child1, mouseDevice.Target);
}
