private void Border_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
var border = sender as UCNode;
if (border == null)
{
return;
}
if (border != SelectedNodeBorder || border.IsSelected != true)
{
//变更选择的节点
border.IsSelected = true;
if (SelectedNodeBorder != null)
{
SelectedNodeBorder.IsSelected = false;
}
SelectedNodeBorder = border;
}
if (_operateStatus == OperateStatus.None ||
_operateStatus == OperateStatus.MoveNode ||
_operateStatus == OperateStatus.SelectedLine)
{
_operateStatus = OperateStatus.SelectedNode;
}
}
/// <summary>
/// 移除指定节点
/// </summary>
private bool RemoveNode(UCNode node)
{
if (node != null)
{
var lineList = GetNodeRelativeLine(node);
if (lineList == null || lineList.Count == 0)
{
if (MessageBox.Show("确认删除节点？", "确认", MessageBoxButton.OKCancel) != MessageBoxResult.OK)
{
return(false);
}
}
else
{
if (MessageBox.Show("该节点下还有行驶路线，是否需要一起删除？", "确认", MessageBoxButton.OKCancel) != MessageBoxResult.OK)
{
return(false);
}
//移除相关联的路线
foreach (var item in lineList)
{
if (RemoveLine(item) == false)
{
return(false);
}
}
}
canvasPanel.Children.Remove(node);
nodeDic.Remove(node);
return(false);
}
return(true);
}
/// <summary>
/// 获取该节点所有相关联的线
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
private List <UCLine> GetNodeRelativeLine(UCNode node)
{
if (node == null || (!nodeDic.ContainsKey(node)))
{
return(new List <UCLine>());
}
var model = nodeDic[node];
var list = runLineDic.Where(a => model.Name.Equals(a.Value.StartNode.Name) || model.Name.Equals(a.Value.EndNode.Name)).Select(a => a.Key);
return(list.ToList());
}
private UCNode MakeNode(NodeModel model)
{
var border = new UCNode();
border.Cursor = Cursors.Hand;
border.X = model.Position.X * canvasPanel.ActualWidth; // - border.Width / 2;
border.Y = model.Position.Y * canvasPanel.ActualHeight; // - border.Height / 2;
border.MouseLeftButtonDown += Border_MouseLeftButtonDown;
border.MouseLeftButtonUp += Border_MouseLeftButtonUp;
border.DeleteCommand = new EventHandler((s, e) => { RemoveNode(SelectedNodeBorder); SelectedNodeBorder = null; });
border.DisplayText = model.Name;
return(border);
}
/// <summary>
/// 添加节点与节点间的连线
/// </summary>
/// <param name="sourceNode"></param>
/// <param name="objNode"></param>
private UCLine AddLine(UCNode sourceNode)
{
var lineMode = new RunLineModel();
lineMode.StartNode = nodeDic[sourceNode];
var line = MakeLine(lineMode);
var x = sourceNode.X - sourceNode.Width / 2;
var y = sourceNode.Y - sourceNode.Height / 2;
line.StartPoint = new Point(x, y);
line.EndPoint = new Point(x, y);
canvasPanel.Children.Add(line);
runLineDic.Add(line, lineMode);
return(line);
}
/// <summary>
/// 添加节点与节点间的连线
/// </summary>
/// <param name="sourceNode"></param>
/// <param name="objNode"></param>
private void AddLine(UCNode sourceNode, UCNode objNode)
{
var lineMode = new RunLineModel();
var line = new UCLine();
var x = sourceNode.X * canvasPanel.ActualWidth - sourceNode.Width / 2;
var y = sourceNode.Y * canvasPanel.ActualHeight - sourceNode.Height / 2;
line.StartPoint = new Point(x, y);
if (objNode != null)
{
x = objNode.X * canvasPanel.ActualWidth - objNode.Width / 2;
y = objNode.Y * canvasPanel.ActualHeight - objNode.Height / 2;
line.EndPoint = new Point(x, y);
}
canvasPanel.Children.Add(line);
runLineDic.Add(line, lineMode);
}
/// <summary>
/// 获取节点的最佳连接点
/// </summary>
/// <param name="border"></param>
/// <param name="relativePoint"></param>
/// <returns></returns>
private Point GetConnectPoint(UCNode border, Point relativePoint)
{
Point point = new Point();
if (border != null)
{
double x, y;
var centerPoint = border.CircleCenterPoint;
//使用圆的角度解决,由圆弧公式可求出xy值
double rad = Math.Atan2((relativePoint.Y - centerPoint.Y), (relativePoint.X - centerPoint.X));// 圆弧
x = centerPoint.X + border.CircleR * Math.Cos(rad);
y = centerPoint.Y + border.CircleR * Math.Sin(rad);
point.X = x;
point.Y = y;
}
return(point);
}
