protected override void OnPreviewDragDrop(RadDropEventArgs e)
{
base.OnPreviewDragDrop(e);
if (e.Handled || !(e.DragInstance is GanttGraphicalViewBaseTaskElement))
{
return;
}
GanttGraphicalViewBaseItemElement hitTarget = e.HitTarget as GanttGraphicalViewBaseItemElement;
if (hitTarget == null)
{
return;
}
DateTime dateTime = this.Owner.GraphicalViewElement.TimelineBehavior.AdjustedTimelineStart.AddSeconds((double)(this.Owner.GraphicalViewElement.HorizontalScrollBarElement.Value + e.DropLocation.X - this.xOutlineFormOffset) * this.Owner.GraphicalViewElement.OnePixelTime.TotalSeconds);
if (dateTime == hitTarget.Data.Start)
{
return;
}
TimeSpan timeSpan = hitTarget.Data.End - hitTarget.Data.Start;
hitTarget.Data.Start = dateTime;
hitTarget.Data.End = dateTime + timeSpan;
hitTarget.GraphicalViewElement.CalculateLinkLines(hitTarget.Data);
}
public virtual bool CanBeResized()
{
GanttGraphicalViewBaseItemElement parent = this.Parent as GanttGraphicalViewBaseItemElement;
if (!parent.Data.ReadOnly)
{
return(!parent.Data.GanttViewElement.ReadOnly);
}
return(false);
}
protected override bool CanDragCore(Point dragStartPoint)
{
if (this.ElementState != ElementState.Loaded)
{
return(false);
}
GanttGraphicalViewBaseItemElement parent = this.Parent as GanttGraphicalViewBaseItemElement;
if (!parent.Data.ReadOnly)
{
return(!parent.Data.GanttViewElement.ReadOnly);
}
return(false);
}
private void SetEndItemVisibility(ElementVisibility visibility)
{
if (this.GanttViewElement == null)
{
return;
}
GanttGraphicalViewBaseItemElement element = this.GanttViewElement.GraphicalViewElement.GetElement(this.EndItem) as GanttGraphicalViewBaseItemElement;
if (element == null)
{
return;
}
if (this.LinkType == TasksLinkType.FinishToStart || this.LinkType == TasksLinkType.StartToStart)
{
element.LeftLinkHandleElement.Visibility = visibility;
element.RightLinkHandleElement.Visibility = ElementVisibility.Hidden;
}
else
{
element.RightLinkHandleElement.Visibility = visibility;
element.LeftLinkHandleElement.Visibility = ElementVisibility.Hidden;
}
}
public GanttViewItemPaintEventArgs(GanttGraphicalViewBaseItemElement element, Graphics graphics)
{
this.element = element;
this.graphics = graphics;
}
