public override void HandleMouseWheel(UIMouseWheelEventArgs e)
{
if (_textSurfaceEventListener != null &&
TextSurfaceEventListener.NotifyPreviewMouseWheel(_textSurfaceEventListener, e))
{
//if the event is handled by the listener
return;
}
base.HandleMouseWheel(e);
}
public virtual void HandleMouseWheel(UIMouseWheelEventArgs e)
{
//
if (e.Delta < 0)
{
//scroll down
//this.StepSmallToMax();
//TODO: review Y diff
ScrollOffset(0, 24);
}
else
{
//up
//this.StepSmallToMin();
//TODO: review Y diff
ScrollOffset(0, -24);
}
}
public TopWindowEventRoot(RootGraphic rootgfx, TopWindowRenderBox topRenderElement)
{
_mouseDownEventArgs = new UIMouseDownEventArgs();
_mouseMoveEventArgs = new UIMouseMoveEventArgs();
_mouseUpEventArgs = new UIMouseUpEventArgs();
_wheelEventArgs = new UIMouseWheelEventArgs();
_topWinBoxEventPortal = new RenderElementEventPortal(topRenderElement);
#if DEBUG
_topWinBoxEventPortal.dbugRootGraphics = (MyRootGraphic)rootgfx;
#endif
_iTopBoxEventPortal = _topWinBoxEventPortal;
_rootgfx = rootgfx;
_hoverMonitoringTask = new UIHoverMonitorTask();
_hoverMonitoringTask.Interval = 100;//ms
_hoverMonitoringTask.Enabled = true;
UIPlatform.RegisterTimerTask(_hoverMonitoringTask);
}
public void MouseWheel(UIMouseWheelEventArgs e, CssBox startAt)
{
}
public void MouseWheel(UIMouseWheelEventArgs e)
{
this.MouseWheel(e, _htmlVisualRoot.RootCssBox);
}
void IEventPortal.PortalMouseWheel(UIMouseWheelEventArgs e)
{
#if DEBUG
if (dbugRootGraphics != null && this.dbugRootGraphics.dbugEnableGraphicInvalidateTrace)
{
this.dbugRootGraphics.dbugGraphicInvalidateTracer.WriteInfo("================");
this.dbugRootGraphics.dbugGraphicInvalidateTracer.WriteInfo("MOUSEWHEEL");
this.dbugRootGraphics.dbugGraphicInvalidateTracer.WriteInfo("================");
}
#endif
HitChain hitPointChain = GetFreeHitChain();
#if DEBUG
_dbugHitChainPhase = dbugHitChainPhase.MouseWheel;
#endif
//find hit element
HitTestCoreWithPrevChainHint(hitPointChain, _previousChain, e.X, e.Y);
if (hitPointChain.Count > 0)
{
//------------------------------
//1. origin object
SetEventOrigin(e, hitPointChain);
//------------------------------
//portal
ForEachOnlyEventPortalBubbleUp(e, hitPointChain, (e1, portal) =>
{
//please ensure=> no local var/pararmeter capture inside lambda
portal.PortalMouseWheel(e1);
//*****
_currentMouseWheel = e1.CurrentContextElement;
return(true);
});
//------------------------------
//use events
if (!e.CancelBubbling)
{
_currentMouseWheel = null;
e.SetCurrentContextElement(null);//clear
ForEachEventListenerBubbleUp(e, hitPointChain, (e1, listener) =>
{
//please ensure=> no local var/pararmeter capture inside lambda
if (listener.BypassAllMouseEvents)
{
return(false);
}
_currentMouseWheel = listener;
listener.ListenMouseWheel(e1);
#if DEBUG
if (e1.CancelBubbling)
{
}
#endif
//retrun true to stop this loop (no further bubble up)
//return false to bubble this to upper control
return(e1.CancelBubbling || !listener.BypassAllMouseEvents);
});
}
}
SwapHitChain(hitPointChain);
e.StopPropagation();
}
void IEventPortal.PortalMouseWheel(UIMouseWheelEventArgs e)
{
//this.OnMouseWheel(e);
}
void IEventListener.ListenMouseWheel(UIMouseWheelEventArgs e)
{
OnMouseWheel(e);
}
void IEventListener.ListenMouseWheel(UIMouseWheelEventArgs e) => MouseWheel?.Invoke(this, e);
void IEventListener.ListenMouseWheel(UIMouseWheelEventArgs e)
{
OnMouseWheel(e);
_externalEventListener?.ListenMouseWheel(e);
}
