/// <summary>
/// 连接二个结点
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
public void Connect(Elements.BaseElement start, Elements.BaseElement end)
{
var line = new Elements.ConnectLine(this);
line.StartElement = start;
line.Connect(end);
}
/// <summary>
/// 检查二个元素是否可以相连
/// </summary>
/// <param name="srcElement"></param>
/// <param name="tarElement"></param>
/// <returns></returns>
public bool CheckCanLine(Elements.BaseElement srcElement, Elements.BaseElement tarElement)
{
if (tarElement.Model.Part.IsStart)
{
return(false);
}
return(!srcElement.Model.Outs.Contains(tarElement.Model));
}
/// <summary>
/// 连接终结点
/// </summary>
/// <param name="el"></param>
public void Connect(Elements.BaseElement el)
{
if (el != null && el != StartElement &&
backGrid.CheckCanLine(StartElement, el))
{
EndElement = el;
EndPoint = el.InPoint;
StartElement.Model.Outs.Add(el.Model);
el.Model.Ins.Add(StartElement.Model);
Position();
if (StartElement is Unit)
{
((Unit)StartElement).RemoveUnitHandle += () =>
{
this.Hide();
};
}
if (el is Unit)
{
((Unit)el).RemoveUnitHandle += () =>
{
this.Hide();
};
}
if (!StartElement.Model.Part.IsEnd)
{
ContextMenuService.SetContextMenu(this, menu);//绑定菜单
}
if (Change != null)
{
Change(this, null);
}
backGrid.BackCanvas.MouseMove -= new MouseEventHandler(BackCanvas_MouseMove);
backGrid.BackCanvas.MouseLeftButtonUp -= new MouseButtonEventHandler(BackCanvas_MouseLeftButtonUp);
}
}
/// <summary>
/// 添加元素
/// </summary>
/// <param name="el"></param>
public void AddElement(Elements.BaseElement el)
{
if (!elements.Contains(el))
{
this.BackCanvas.Children.Add(el);
elements.Add(el);
el.CanvasGrid = this;
el.ResetPosition(this);
if (Change != null)
{
el.Change += Change;
}
CheckCanvasGrid();
//如果是出口，则直接与终结点连接
if (el.Model.Part.IsEnd)
{
Connect(el, EndPoint);
}
}
}
