public override bool AcceptsTracker(GVTrackerBase tracker)
{
if (tracker is GVTrackerControlOut)
{
return(true);
}
if (tracker is GVTrackerDataOut)
{
return(true);
}
return(false);
}
public void ResetPoints()
{
mouseDownPoint = PointF.Empty;
mouseMovePoint = PointF.Empty;
mouseUpPoint = PointF.Empty;
logDownPoint = PointF.Empty;
logMovePoint = PointF.Empty;
logUpPoint = PointF.Empty;
mouseState = GVGraphViewMouseState.None;
downObject = null;
downObjectHotPointOffset = PointF.Empty;
TrackedObject = null;
upObject = null;
ActiveTracker = null;
}
private void GVGraphView_MouseMove(object sender, MouseEventArgs e)
{
if (p_context.mouseState != GVGraphViewMouseState.None)
{
p_context.mouseMovePoint.X = e.X;
p_context.mouseMovePoint.Y = e.Y;
p_context.logMovePoint = p_context.ConvertClientToLogical(e.X, e.Y);
p_context.TrackedObject = p_graph.Objects.FindObjectContainingClientPoint(p_context.mouseMovePoint);
// test if we should transfer to MOVING status
if (p_context.mouseState == GVGraphViewMouseState.Down)
{
float diff = Math.Abs(e.X - p_context.mouseDownPoint.X) + Math.Abs(e.Y + p_context.mouseDownPoint.Y);
if (diff >= 6)
{
p_context.mouseState = GVGraphViewMouseState.Moved;
}
}
if (p_context.mouseState == GVGraphViewMouseState.Moved)
{
if (p_context.ActiveTracker != null)
{
p_context.ActiveTracker.OnTrack(p_context);
}
else if (p_context.MovedObject == null)
{
// move whole diagram
p_context.DiagramTempOffset.X = e.X - p_context.mouseDownPoint.X;
p_context.DiagramTempOffset.Y = e.Y - p_context.mouseDownPoint.Y;
}
}
Invalidate();
}
if (p_context.mouseState == GVGraphViewMouseState.None)
{
if (OnItemHover != null)
{
p_context.mouseMovePoint.X = e.X;
p_context.mouseMovePoint.Y = e.Y;
GeneralEventArgs args = new GeneralEventArgs();
GVGraphObject go = Graph.Objects.FindObjectContainingClientPoint(p_context.mouseMovePoint);
if (go != null)
{
args.UserInfo["object"] = go;
}
else
{
GVTrackerBase tb = FindActiveTracker(p_context.mouseMovePoint);
if (tb != null)
{
args.UserInfo["tracker"] = tb;
}
}
OnItemHover(this, args);
}
}
}
public virtual bool AcceptsTracker(GVTrackerBase tracker)
{
return(true);
}