public void MouseDown(UIMouseDownEventArgs e, CssBox startAt)
{
if (!_isBinded)
{
return;
}
if (startAt == null)
{
return;
}
//----------------------------------------------------
if (!e.Shift)
{
ClearPreviousSelection();
}
if (_latestMouseDownChain != null)
{
ReleaseHitChain(_latestMouseDownChain);
_latestMouseDownChain = null;
}
_lastDomLayoutVersion = _htmlVisualRoot.LayoutVersion;
//----------------------------------------------------
int x = e.X;
int y = e.Y;
_mouseDownStartAt = startAt;
_mousedownX = x;
_mousedownY = y;
CssBoxHitChain hitChain = GetFreeHitChain();
#if DEBUG
hitChain.debugEventPhase = CssBoxHitChain.dbugEventPhase.MouseDown;
#endif
hitChain.SetRootGlobalPosition(x, y);
//1. hittest
BoxHitUtils.HitTest(startAt, x, y, hitChain);
//2. propagate events
SetEventOrigin(e, hitChain);
ForEachOnlyEventPortalBubbleUp(e, hitChain, portal =>
{
portal.PortalMouseDown(e);
return(true);
});
if (!e.CancelBubbling)
{
IUIEventListener prevMouseDownElement = _currentMouseDown;
_currentMouseDown = null; //clear
e.SetCurrentContextElement(null);
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
//TODO: check accept keyboard
_currentMouseDown = e.CurrentContextElement;
e.CurrentContextElement.ListenMouseDown(e);
if (prevMouseDownElement != null &&
prevMouseDownElement != _currentMouseDown)
{
prevMouseDownElement.ListenLostMouseFocus(_mouseLostFocus);
}
return(e.CancelBubbling);
});
}
//----------------------------------
//save mousedown hitchain
_latestMouseDownChain = hitChain;
}
void IEventPortal.PortalMouseDown(UIMouseDownEventArgs e)
{
#if DEBUG
if (this.dbugRootGraphics != null && this.dbugRootGraphics.dbugEnableGraphicInvalidateTrace)
{
this.dbugRootGraphics.dbugGraphicInvalidateTracer.WriteInfo("================");
this.dbugRootGraphics.dbugGraphicInvalidateTracer.WriteInfo("MOUSEDOWN");
this.dbugRootGraphics.dbugGraphicInvalidateTracer.WriteInfo("================");
}
dbugMsgChainVersion = 1;
int local_msgVersion = 1;
#endif
HitChain hitPointChain = GetFreeHitChain();
#if DEBUG
_dbugHitChainPhase = dbugHitChainPhase.MouseDown;
#endif
HitTestCoreWithPrevChainHint(hitPointChain, _previousChain, e.X, e.Y);
if (hitPointChain.Count > 0)
{
//------------------------------
//1. origin object
SetEventOrigin(e, hitPointChain);
//------------------------------
_currentMouseDown = null;
//portal
ForEachOnlyEventPortalBubbleUp(e, hitPointChain, (e1, portal) =>
{
//please ensure=> no local var/pararmeter capture inside lambda
portal.PortalMouseDown(e1);
//*****
_currentMouseDown = e1.CurrentContextElement;
return(true);
});
//------------------------------
//use events
if (!e.CancelBubbling)
{
_currentMouseDown = null; //clear
e.SetCurrentContextElement(null);
ForEachEventListenerBubbleUp(e, hitPointChain, (e1, listener) =>
{
//please ensure=> no local var/pararmeter capture inside lambda
if (listener.BypassAllMouseEvents)
{
return(false);
}
_currentMouseDown = listener;
listener.ListenMouseDown(e1);
//-------------------------------------------------------
//auto begin monitor mouse press
_mousePressMonitor.AddMousePressInformation(e1);
_mousePressMonitor.SetMonitoredElement(listener);
//-------------------------------------------------------
bool cancelMouseBubbling = e1.CancelBubbling;
if (_prevMouseDownElement != null &&
_prevMouseDownElement != listener)
{
_prevMouseDownElement.ListenLostMouseFocus(_mouseLostFocusArgs);
_prevMouseDownElement = null;//clear
}
//-------------------------------------------------------
//retrun true to stop this loop (no further bubble up)
//return false to bubble this to upper control
return(e1.CancelBubbling || !listener.BypassAllMouseEvents);
});
if (_currentMouseDown == null)
{
_mousePressMonitor.Reset();
}
}
if (_prevMouseDownElement != _currentMouseDown &&
_prevMouseDownElement != null)
{
//TODO: review here, auto or manual
_prevMouseDownElement.ListenLostMouseFocus(_mouseLostFocusArgs);
_prevMouseDownElement = null;
}
}
//---------------------------------------------------------------
#if DEBUG
RootGraphic dbug_visualroot = this.dbugRootGraphics;
if (dbug_visualroot != null && dbug_visualroot.dbug_RecordHitChain)
{
dbug_visualroot.dbug_rootHitChainMsg.Clear();
HitInfo hitInfo;
for (int tt = hitPointChain.Count - 1; tt >= 0; --tt)
{
hitInfo = hitPointChain.GetHitInfo(tt);
RenderElement ve = hitInfo.HitElemAsRenderElement;
if (ve != null)
{
ve.dbug_WriteOwnerLayerInfo(dbug_visualroot, tt);
ve.dbug_WriteOwnerLineInfo(dbug_visualroot, tt);
string hit_info = new string('.', tt) + " [" + tt + "] "
+ "(" + hitInfo.point.X + "," + hitInfo.point.Y + ") "
+ ve.dbug_FullElementDescription();
dbug_visualroot.dbug_rootHitChainMsg.AddLast(new dbugLayoutMsg(ve, hit_info));
}
}
}
#endif
SwapHitChain(hitPointChain);
e.StopPropagation(); //TODO: review this again
#if DEBUG
if (local_msgVersion != dbugMsgChainVersion)
{
return;
}
dbug_visualroot.dbugHitTracker.Write("stop-mousedown");
dbug_visualroot.dbugHitTracker.Play = false;
#endif
}