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; } }
public virtual void DispatchEvent(EventBase evt, IPanel panel) { IMouseEvent mouseEvent = evt as IMouseEvent; // FIXME: we should not change hover state when capture is true. // However, when doing drag and drop, drop target should be highlighted. // TODO when EditorWindow is docked MouseLeaveWindow is not always sent // this is a problem in itself but it could leave some elements as "hover" BaseVisualElementPanel basePanel = panel as BaseVisualElementPanel; if (basePanel != null && (evt.eventTypeId == MouseLeaveWindowEvent.TypeId() || evt.eventTypeId == DragExitedEvent.TypeId())) { basePanel.SetElementUnderMouse(null, evt); } else { // update element under mouse and fire necessary events if (basePanel != null) { bool shouldRecomputeTopElementUnderMouse = true; if ((IMouseEventInternal)mouseEvent != null) { shouldRecomputeTopElementUnderMouse = ((IMouseEventInternal)mouseEvent).recomputeTopElementUnderMouse; } VisualElement elementUnderMouse = shouldRecomputeTopElementUnderMouse ? basePanel.Pick(mouseEvent.mousePosition) : basePanel.topElementUnderMouse; if (evt.target == null) { evt.target = elementUnderMouse; } // Because events are queued, we can set the element under mouse // right now, instead of waiting after the PropagateEvent() as we // did before. basePanel.SetElementUnderMouse(elementUnderMouse, evt); } if (evt.target != null) { evt.propagateToIMGUI = false; EventDispatchUtilities.PropagateEvent(evt); } } if (!evt.isPropagationStopped && panel != null) { if (evt.propagateToIMGUI || evt.eventTypeId == MouseEnterWindowEvent.TypeId() || evt.eventTypeId == MouseLeaveWindowEvent.TypeId() ) { EventDispatchUtilities.PropagateToIMGUIContainer(panel.visualTree, evt); } } evt.stopDispatch = true; }