private static void TakeCapture()
{
if (s_ContainerStack.Count > 0)
{
var topmostContainer = s_ContainerStack.Peek();
if (MouseCaptureController.IsMouseCaptured() && !topmostContainer.HasMouseCapture())
{
Debug.Log("Should not grab hot control with an active capture");
}
topmostContainer.CaptureMouse();
}
}
private static void ReleaseCapture()
{
MouseCaptureController.ReleaseMouse();
}
public void DispatchEvent(EventBase evt, IPanel panel)
{
EventBehavior captureBehavior = EventBehavior.None;
if (MouseCaptureController.mouseCapture == null)
{
return;
}
// Release mouse capture if capture element is not in a panel.
VisualElement captureVE = MouseCaptureController.mouseCapture as VisualElement;
if (evt.eventTypeId != MouseCaptureOutEvent.TypeId() && captureVE != null && captureVE.panel == null)
{
MouseCaptureController.ReleaseMouse();
return;
}
if (panel != null && captureVE != null && captureVE.panel.contextType != panel.contextType)
{
return;
}
IMouseEvent mouseEvent = evt as IMouseEvent;
if (mouseEvent != null && (evt.target == null || evt.target == MouseCaptureController.mouseCapture))
{
// Exclusive processing by capturing element.
captureBehavior = EventBehavior.IsCapturable;
captureBehavior |= EventBehavior.IsSentExclusivelyToCapturingElement;
}
else if (evt.imguiEvent != null && evt.target == null)
{
// Non exclusive processing by capturing element.
captureBehavior = EventBehavior.IsCapturable;
}
if (evt.eventTypeId == MouseEnterWindowEvent.TypeId() ||
evt.eventTypeId == MouseLeaveWindowEvent.TypeId() ||
evt.eventTypeId == WheelEvent.TypeId())
{
captureBehavior = EventBehavior.None;
}
if ((captureBehavior & EventBehavior.IsCapturable) == EventBehavior.IsCapturable)
{
BaseVisualElementPanel basePanel = panel as BaseVisualElementPanel;
if (mouseEvent != null && basePanel != null)
{
bool shouldRecomputeTopElementUnderMouse = true;
if ((IMouseEventInternal)mouseEvent != null)
{
shouldRecomputeTopElementUnderMouse =
((IMouseEventInternal)mouseEvent).recomputeTopElementUnderMouse;
}
VisualElement elementUnderMouse = shouldRecomputeTopElementUnderMouse ?
basePanel.Pick(mouseEvent.mousePosition) :
basePanel.topElementUnderMouse;
basePanel.SetElementUnderMouse(elementUnderMouse, evt);
}
IEventHandler originalCaptureElement = MouseCaptureController.mouseCapture;
evt.dispatch = true;
evt.target = MouseCaptureController.mouseCapture;
evt.currentTarget = MouseCaptureController.mouseCapture;
evt.propagationPhase = PropagationPhase.AtTarget;
MouseCaptureController.mouseCapture.HandleEvent(evt);
// Do further processing with a target computed the usual way.
// However, if mouseEventWasCaptured, the only thing remaining to do is ExecuteDefaultAction,
// which should be done with mouseCapture as the target.
if ((captureBehavior & EventBehavior.IsSentExclusivelyToCapturingElement) != EventBehavior.IsSentExclusivelyToCapturingElement)
{
evt.target = null;
}
evt.currentTarget = null;
evt.propagationPhase = PropagationPhase.None;
evt.dispatch = false;
// Do not call HandleEvent again for this element.
evt.skipElements.Add(originalCaptureElement);
evt.stopDispatch = (captureBehavior & EventBehavior.IsSentExclusivelyToCapturingElement) == EventBehavior.IsSentExclusivelyToCapturingElement;
evt.propagateToIMGUI = false;
}
}