WPF 鼠标左键捕获点,用polyline连接起来
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WPF 鼠标左键捕获点,用polyline连接起来
Polyline lines;
Line dot;
Polyline cach;
public Window1()
{
InitializeComponent();
lines=new Polyline();
lines.Stroke =new SolidColorBrush(Colors.Black);
canvas.Children.Add(lines);
cach=new Polyline();
cach.Stroke =new SolidColorBrush(Colors.Black);
canvas.Children.Add(cach);
dot=new Line();
dot.Stroke =new SolidColorBrush(Colors.Black);
dot.StrokeDashArray.Add(4);
canvas.Children.Add(dot);
}
void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var point= e.GetPosition(canvas);
lines.Points.Add(point);
}
void Canvas_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
cach.Points=lines.Points.Clone();
cach.Points.Add(lines.Points[0]);
lines.Points.Clear();
dot.X1=dot.X2=dot.Y1=dot.Y2=0;
}
void Canvas_MouseMove(object sender, MouseEventArgs e)
{
if (lines.Points.Count>0) {
var point=lines.Points[lines.Points.Count-1];
dot.X1=point.X;
dot.Y1=point.Y;
point= e.GetPosition(canvas);
dot.X2=point.X;
dot.Y2=point.Y;
}
}
标签:point,lines,Add,Points,polyline,左键,new,WPF,dot 来源: https://blog.csdn.net/qq_43024228/article/details/118460989