private void ControlLineEndThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
var thumb = sender as Thumb;
Canvas canvas = ControlLine.ControlLineCanvas.canvas;
Point endPos = ControlLine.End.GetPos(e.HorizontalChange, e.VerticalChange);
Point startPos = ControlLine.Start.GetPos();
if (endPos.X < 0)
{
endPos.X = 0;
}
else if (endPos.X > canvas.ActualWidth - ControlLine.End.ActualWidth)
{
endPos.X = canvas.ActualWidth - ControlLine.End.ActualWidth;
}
if (endPos.Y < 0)
{
endPos.Y = 0;
}
else if (endPos.Y > canvas.ActualHeight - ControlLine.End.ActualHeight)
{
endPos.Y = canvas.ActualHeight - ControlLine.End.ActualHeight;
}
Vector v = Point.Subtract(endPos, startPos);
ControlLine.End.SetPos(endPos);
ControlLine.Mid.SetPos(new Point(startPos.X + v.X / 2, startPos.Y + v.Y / 2));
ControlLine.UpdateLine();
thumb.UpdateLayout();
e.Handled = true;
}
private void AddLine(ControlLineCanvas canvas1, ControlLineCanvas canvas2)
{
if (canvas1.IsDrawing)
{
canvas1.IsDrawing = false;
var cl1 = canvas1.ControlLines[canvas1.ControlLines.Count - 1];
var cl2 = new ControlLine(canvas2, cl1);
canvas2.ControlLines.Add(cl2);
cl1.Mid.PreviewMouseRightButtonDown += DeleteLine;
cl2.Mid.PreviewMouseRightButtonDown += DeleteLine;
}
}
public ControlLineMidThumb(ControlLine controlLine, double x, double y) : base(controlLine, x, y)
{
ControlTemplate template = controlLine.ControlLineCanvas.FindResource("midTemplate") as ControlTemplate;
Template = template;
ApplyTemplate();
DragDelta += ControlLineMidThumb_DragDelta;
controlLine.ControlLineCanvas.Add(this);
Canvas.SetLeft(this, x);
Canvas.SetTop(this, y);
Panel.SetZIndex(this, 1);
UpdateLayout();
}
private void canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (!CanDraw)
{
return;
}
Point mousePos = e.GetPosition(canvas);
var controlLine = new ControlLine(this, mousePos.X, mousePos.Y);
IsDrawing = true;
ControlLines.Add(controlLine);
controlLine.End.CaptureMouse();
controlLine.End.RaiseEvent(e);
}
public ControlLine(ControlLineCanvas controlLineCanvas, ControlLine controlLine)
{
ControlLineCanvas = controlLineCanvas;
Point startPos = controlLine.Start.GetPos();
Point endPos = controlLine.End.GetPos();
Start = new ControlLineStartThumb(this, startPos.X, startPos.Y);
End = new ControlLineEndThumb(this, endPos.X, endPos.Y);
Vector v = Point.Subtract(startPos, endPos);
Mid = new ControlLineMidThumb(this, endPos.X + v.X / 2, endPos.Y + v.Y / 2);
Canvas.SetZIndex(End, 2);
Line = new LineGeometry();
Path = new Path();
Path.Stroke = Brushes.LimeGreen;
Path.StrokeThickness = 1;
Path.Data = Line;
ControlLineCanvas.canvas.Children.Add(Path);
UpdateLine();
}
private void ControlLineMidThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
var thumb = sender as Thumb;
Canvas canvas = ControlLine.ControlLineCanvas.canvas;
Point startPos = ControlLine.Start.GetPos(e.HorizontalChange, e.VerticalChange);
Point midPos = ControlLine.Mid.GetPos(e.HorizontalChange, e.VerticalChange);
Point endPos = ControlLine.End.GetPos(e.HorizontalChange, e.VerticalChange);
double canvasWidth = canvas.ActualWidth;
double canvasHeight = canvas.ActualHeight;
double startWidth = ControlLine.Start.ActualWidth;
double startHeight = ControlLine.Start.ActualHeight;
double endWidth = ControlLine.End.ActualWidth;
double endHeight = ControlLine.End.ActualHeight;
if (startPos.X < 0)
{
double diff = 0 - startPos.X;
startPos.X += diff;
midPos.X += diff;
endPos.X += diff;
}
else if (startPos.X > canvasWidth - startWidth)
{
double diff = startPos.X - canvasWidth + startWidth;
startPos.X -= diff;
midPos.X -= diff;
endPos.X -= diff;
}
if (startPos.Y < 0)
{
double diff = 0 - startPos.Y;
startPos.Y += diff;
midPos.Y += diff;
endPos.Y += diff;
}
else if (startPos.Y > canvasHeight - startHeight)
{
double diff = startPos.Y - canvasHeight + startHeight;
startPos.Y -= diff;
midPos.Y -= diff;
endPos.Y -= diff;
}
if (endPos.X < 0)
{
double diff = 0 - endPos.X;
startPos.X += diff;
midPos.X += diff;
endPos.X += diff;
}
else if (endPos.X > canvasWidth - endWidth)
{
double diff = endPos.X - canvasWidth + endWidth;
startPos.X -= diff;
midPos.X -= diff;
endPos.X -= diff;
}
if (endPos.Y < 0)
{
double diff = 0 - endPos.Y;
startPos.Y += diff;
midPos.Y += diff;
endPos.Y += diff;
}
else if (endPos.Y > canvasHeight - endHeight)
{
double diff = endPos.Y - canvasHeight + endHeight;
startPos.Y -= diff;
midPos.Y -= diff;
endPos.Y -= diff;
}
ControlLine.Start.SetPos(startPos);
ControlLine.Mid.SetPos(midPos);
ControlLine.End.SetPos(endPos);
ControlLine.UpdateLine();
thumb.UpdateLayout();
e.Handled = true;
}
public ControlLineThumb(ControlLine controlLine, double x, double y)
{
MouseEnter += ControlLineThumb_MouseEnter;
MouseLeave += ControlLineThumb_MouseLeave;
ControlLine = controlLine;
}