void textBox_TextChange(object sender, TextChangedEventArgs e)
{
ChangeTextBox = sender as TextBox;
var textBoxNamevar = from t in textBoxDic where t.Value == ChangeTextBox select t.Key;
string textBoxName = textBoxNamevar.FirstOrDefault();
ClassLibrary_Graph.Node <string> node1 = new ClassLibrary_Graph.Node <string>(arrowDic[textBoxName].Tail);
ClassLibrary_Graph.Node <string> node2 = new ClassLibrary_Graph.Node <string>(arrowDic[textBoxName].Head);
graph.ChangeEdgeWei(node1, node2, int.Parse(ChangeTextBox.Text));
}
protected override void OnMouseUp(MouseButtonEventArgs e)
{
base.OnMouseUp(e);
if (IsDrawing && e.ChangedButton == MouseButton.Left)
{
IsDrawing = false;
ReleaseMouseCapture();
}
else if (IsDragging && e.ChangedButton == MouseButton.Right)
{
IsDragging = false;
}
else if (!IsInGrid && IsConnecting && e.ChangedButton == MouseButton.Left)
{//未在圆内释放
IsConnecting = false;
this.GraphShowCanvas.Children.Remove(arrow);
}
else if (IsInGrid && IsConnecting && e.ChangedButton == MouseButton.Left)
{//在圆内释放
IsConnecting = false;
arrow.Head = ChangeGrid.Name;
if (arrow.Tail == arrow.Head)
{//起始点同圆，箭头失效
this.GraphShowCanvas.Children.Remove(arrow);
}
else
{//将arrow添加arrowDic中
string arrowName = arrow.Tail + "-" + arrow.Head;
if (arrowDic.ContainsKey(arrowName))
{//已经存在从此尾到此头的箭头
this.GraphShowCanvas.Children.Remove(arrow);
}
else
{ //将箭头添加到arrowDic和Graph中
arrowDic.Add(arrowName, arrow);
ClassLibrary_Graph.Node <string> node1 = new ClassLibrary_Graph.Node <string>(arrow.Tail);
ClassLibrary_Graph.Node <string> node2 = new ClassLibrary_Graph.Node <string>(arrow.Head);
graph.SetEdge(node1, node2, 1);
//textbox用于输入权值
TextBox textBox = new TextBox();
textBoxDic.Add(arrowName, textBox);
this.GraphShowCanvas.Children.Add(textBox);
Canvas.SetLeft(textBox, (arrow.X1 + arrow.X2) / 2);
Canvas.SetTop(textBox, (arrow.Y1 + arrow.Y2) / 2);
//添加路由事件，当textbox内容改变时，同时改变这条边的权值
textBox.TextChanged += new TextChangedEventHandler(textBox_TextChange);;
}
}
}
}
public void DelGrid(string delName)
{
//删除圆
this.GraphShowCanvas.Children.Remove(gridDic[delName]);
gridDic.Remove(delName);
ClassLibrary_Graph.Node <string> node = new ClassLibrary_Graph.Node <string>(delName);
graph.DelNode(node);
//删除相关的连线及textBox
//以其为尾的arrow：
string prefix = delName + "-";
List <string> DelKeys = new List <string>();//由于在foreach循环中无法使用remove，需要循环后再删除
foreach (string Key in arrowDic.Keys)
{
if (Key.StartsWith(prefix))
{
DelKeys.Add(Key);
}
}
foreach (string delKey in DelKeys)
{
this.GraphShowCanvas.Children.Remove(arrowDic[delKey]);
arrowDic.Remove(delKey);
this.GraphShowCanvas.Children.Remove(textBoxDic[delKey]);
textBoxDic.Remove(delKey);
}
DelKeys.Clear();
//以其为头的arrow
string suffix = "-" + delName;
foreach (string Key in arrowDic.Keys)
{
if (Key.EndsWith(suffix))
{
DelKeys.Add(Key);
}
}
foreach (string delKey in DelKeys)
{
this.GraphShowCanvas.Children.Remove(arrowDic[delKey]);
arrowDic.Remove(delKey);
this.GraphShowCanvas.Children.Remove(textBoxDic[delKey]);
textBoxDic.Remove(delKey);
}
}
//双击右键删除圆或箭头
protected override void OnMouseDoubleClick(MouseButtonEventArgs e)
{
base.OnMouseDoubleClick(e);
if (e.ChangedButton == MouseButton.Right && IsInGrid == true)
{
DelGrid(ChangeGrid.Name);
////删除圆
//gridDic.Remove(ChangeGrid.Name);
//this.GraphShowCanvas.Children.Remove(ChangeGrid);
//ClassLibrary_Graph.Node<string> node = new ClassLibrary_Graph.Node<string>(ChangeGrid.Name);
//graph.DelNode(node);
////删除相关的连线及textBox
////以其为尾的arrow：
//string prefix = ChangeGrid.Name + "-";
//List<string> DelKeys = new List<string>();//由于在foreach循环中无法使用remove，需要循环后再删除
////ClassLibrary_Graph.Node<string> node1 = new ClassLibrary_Graph.Node<string>("0");
////ClassLibrary_Graph.Node<string> node2 = new ClassLibrary_Graph.Node<string>("0");
//foreach (string Key in arrowDic.Keys)
//{
// if (Key.StartsWith(prefix))
// {
// DelKeys.Add(Key);
// }
//}
////node1.Data = ChangeGrid.Name;
//foreach (string delKey in DelKeys)
//{
// //node2.Data = arrowDic[delKey].Head;
// //Graph.DelEdge(node1, node2);//Graph类里删除顶点不用再删除边
// this.GraphShowCanvas.Children.Remove(arrowDic[delKey]);
// arrowDic.Remove(delKey);
// this.GraphShowCanvas.Children.Remove(textBoxDic[delKey]);
// textBoxDic.Remove(delKey);
//}
//DelKeys.Clear();
////以其为头的arrow
//string suffix = "-" + ChangeGrid.Name;
//foreach (string Key in arrowDic.Keys)
//{
// if (Key.EndsWith(suffix))
// {
// DelKeys.Add(Key);
// }
//}
////node2.Data = ChangeGrid.Name;
//foreach (string delKey in DelKeys)
//{
// //node1.Data = arrowDic[delKey].Tail;
// //Graph.DelEdge(node1, node2);
// this.GraphShowCanvas.Children.Remove(arrowDic[delKey]);
// arrowDic.Remove(delKey);
// this.GraphShowCanvas.Children.Remove(textBoxDic[delKey]);
// textBoxDic.Remove(delKey);
//}
}
else if (e.ChangedButton == MouseButton.Right && IsInArrow == true)
{//删除箭头
ClassLibrary_Graph.Node <string> node1 = new ClassLibrary_Graph.Node <string>(ChangeArrow.Tail);
ClassLibrary_Graph.Node <string> node2 = new ClassLibrary_Graph.Node <string>(ChangeArrow.Head);
graph.DelEdge(node1, node2);
string arrowName = ChangeArrow.Tail + "-" + ChangeArrow.Head;
arrowDic.Remove(arrowName);
this.GraphShowCanvas.Children.Remove(ChangeArrow);
//删除textBox
this.GraphShowCanvas.Children.Remove(textBoxDic[arrowName]);
textBoxDic.Remove(arrowName);
}
}
//点击左键，定义圆的圆心并绘制
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
//执行基本的方法
base.OnMouseLeftButtonDown(e);
//连箭头
if (IsInGrid == true)
{
arrow = new ClassLibrary_Graph.Arrow();
arrow.HeadHeight = 10;
arrow.HeadWidth = 10;
arrow.Stroke = Brushes.Black;
arrow.StrokeThickness = 3;
arrow.Tail = ChangeGrid.Name;
arrow.X1 = Canvas.GetLeft(ChangeGrid) + ChangeGrid.Width / 2;//箭尾为所在圆的圆心
arrow.Y1 = Canvas.GetTop(ChangeGrid) + ChangeGrid.Height / 2;
//添加路由事件
arrow.MouseEnter += new MouseEventHandler(arrow_MouseEnter);
arrow.MouseLeave += new MouseEventHandler(arrow_MouseLeave);
IsConnecting = true;
IsSettingArrow = true;
return;
}
//对箭头进行左击，不添加新圆
if (IsInArrow == true)
{
return;
}
//创建一个grid对象，存放圆与标签
grid = new Grid();
grid.Width = 40;
grid.Height = 40;
ptcenter = e.GetPosition(this.GraphShowCanvas);//返回相对canvas的点位置
grid.Name = pointNames[pointNamesNum];
//创建一个Ellipse对象，并且把它加入到grid中
elips = new Ellipse();//新建一个椭圆对象
elips.Stroke = SystemColors.WindowTextBrush;
elips.Width = 40;
elips.Height = 40;//固定直径为40
elips.Fill = Brushes.White;
grid.Children.Add(elips);
//创建一个label对象，并把它加入grid中
label = new Label();
label.Content = pointNames[pointNamesNum++];
label.HorizontalAlignment = HorizontalAlignment.Center;//居中
label.VerticalAlignment = VerticalAlignment.Center;
grid.Children.Add(label);
//添加路由事件
grid.MouseEnter += new MouseEventHandler(grid_MouseEnter);
grid.MouseLeave += new MouseEventHandler(grid_MouseLeave);
grid.MouseRightButtonDown += new MouseButtonEventHandler(grid_MouseRightButtonDown);
//grid添加到Canvas和gridDic和Graph中
this.GraphShowCanvas.Children.Add(grid);
gridDic.Add(grid.Name, grid);
Panel.SetZIndex(grid, 1);
Canvas.SetLeft(grid, ptcenter.X - grid.Width / 2);//ptcenter的(x,y)为elips的圆心坐标
Canvas.SetTop(grid, ptcenter.Y - grid.Height / 2);
ClassLibrary_Graph.Node <string> node = new ClassLibrary_Graph.Node <string>(label.Content.ToString());
graph.SetNode(node);
//获取鼠标，即使鼠标离开区域也可获取鼠标消息
CaptureMouse();
IsDrawing = true;
}
