static void UpdateElementUnderMouse(EventBase evt, BaseVisualElementPanel panel, out VisualElement elementUnderMouse) { bool shouldRecomputeTopElementUnderMouse = (evt as IMouseEventInternal)?.recomputeTopElementUnderMouse ?? true; elementUnderMouse = shouldRecomputeTopElementUnderMouse ? panel.Pick(((IMouseEvent)evt).mousePosition) : panel.GetTopElementUnderPointer(PointerId.mousePointerId); // If mouse leaves the window, make sure element under mouse is null. // However, if pressed button != 0, we are getting a MouseLeaveWindowEvent as part of // of a drag and drop operation, at the very beginning of the drag. Since // we are not really exiting the window, we do not want to set the element // under mouse to null in this case. if (evt.eventTypeId == MouseLeaveWindowEvent.TypeId() && (evt as MouseLeaveWindowEvent).pressedButtons == 0) { panel.SetElementUnderPointer(null, evt); } else if (shouldRecomputeTopElementUnderMouse) { panel.SetElementUnderPointer(elementUnderMouse, evt); } }
protected internal override void PostDispatch(IPanel panel) { if (PointerType.IsDirectManipulationDevice(pointerType)) { panel.ReleasePointer(pointerId); BaseVisualElementPanel basePanel = panel as BaseVisualElementPanel; basePanel?.SetElementUnderPointer(null, this); } if (panel.ShouldSendCompatibilityMouseEvents(this)) { using (var evt = MouseUpEvent.GetPooled(this)) { evt.target = target; target.SendEvent(evt); } } base.PostDispatch(panel); }
public void DispatchEvent(EventBase evt, IPanel panel) { EventBehavior captureBehavior = EventBehavior.None; IEventHandler capturingElement = panel?.GetCapturingElement(PointerId.mousePointerId); if (capturingElement == null) { return; } // Release mouse capture if capture element is not in a panel. VisualElement captureVE = capturingElement as VisualElement; if (evt.eventTypeId != MouseCaptureOutEvent.TypeId() && captureVE != null && captureVE.panel == null) { captureVE.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 == capturingElement)) { // 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.GetTopElementUnderPointer(PointerId.mousePointerId); basePanel.SetElementUnderPointer(elementUnderMouse, evt); } evt.dispatch = true; evt.target = capturingElement; evt.currentTarget = capturingElement; (capturingElement as CallbackEventHandler)?.HandleEventAtTargetPhase(evt); // Do further processing with a target computed the usual way. // However, if IsSentExclusivelyToCapturingElement, 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(capturingElement); evt.stopDispatch = (captureBehavior & EventBehavior.IsSentExclusivelyToCapturingElement) == EventBehavior.IsSentExclusivelyToCapturingElement; evt.propagateToIMGUI = false; } }