public void MouseLeftButtonUp_CreateArrow(object sender, MouseButtonEventArgs e)
{
canvas.MouseMove -= MouseMove_ArrowDrawing;
if (classBox is ClassBox)
{
Point classBoxPoint = classBox.TransformToAncestor(canvas).Transform(new Point(0, 0));
Point pt = new Point(classBoxPoint.X + classBox.ActualWidth / 2, classBoxPoint.Y + classBox.ActualHeight / 2);
classBox.linkPoint = pt;
arrow.X2 = pt.X;
arrow.Y2 = pt.Y;
classBox.arrowLinesTo.Add(arrow);
}
else
{
canvas.Children.Remove(arrow);
arrow = null;
}
foreach (object obj in canvas.Children)
{
if (obj is ClassBox)
{
ClassBox cb = (ClassBox)obj;
cb.MouseLeftButtonDown -= MouseLeftButtonDown_CreateArrow;
cb.MouseLeftButtonDown += MouseLeftButtonDown_groupClassBox;
cb.MouseLeftButtonUp -= MouseLeftButtonUp_CreateArrow;
}
}
canvas.MouseLeftButtonUp -= MouseLeftButtonUp_CreateArrow;
}
private void MouseMove_groupClassBox(object sender, MouseEventArgs e)
{
if (sender is ClassBox)
{
ClassBox moveObject = (ClassBox)sender;
Point point = e.GetPosition(canvas);
double x = point.X;
double y = point.Y;
if (x < mouseMinX)
{
x = mouseMinX;
}
else if (x > mouseMaxX)
{
x = mouseMaxX;
}
if (y < mouseMinY)
{
y = mouseMinY;
}
else if (y > mouseMaxY)
{
y = mouseMaxY;
}
Point classBoxPoint = moveObject.TransformToAncestor(canvas).Transform(new Point(0, 0));
Point pt = new Point(classBoxPoint.X + moveObject.ActualWidth / 2, classBoxPoint.Y + moveObject.ActualHeight / 2);
moveObject.linkPoint = pt;
foreach (ArrowLine arrow in moveObject.arrowLinesTo)
{
arrow.X2 = moveObject.linkPoint.X;
arrow.Y2 = moveObject.linkPoint.Y;
}
foreach (ArrowLine arrow in moveObject.arrowLinesFrom)
{
arrow.X1 = moveObject.linkPoint.X;
arrow.Y1 = moveObject.linkPoint.Y;
}
double top = beginTop + y;
double left = beginLeft + x;
Canvas.SetLeft(moveObject, left);
Canvas.SetTop(moveObject, top);
}
}
private void MouseLeftButtonDown_CreateArrow(object sender, MouseButtonEventArgs e)
{
if (sender is ClassBox)
{
ClassBox classBox = (ClassBox)sender;
if (arrow.X1 == 0 && arrow.X2 == 0)
{
Point classBoxPoint = classBox.TransformToAncestor(canvas).Transform(new Point(0, 0));
Point pt = new Point(classBoxPoint.X + classBox.ActualWidth / 2, classBoxPoint.Y + classBox.ActualHeight / 2);
arrow.X1 = pt.X;
arrow.Y1 = pt.Y;
arrow.X2 = pt.X;
arrow.Y2 = pt.Y;
canvas.MouseMove += MouseMove_ArrowDrawing;
canvas.Children.Add(arrow);
classBox.arrowLinesFrom.Add(arrow);
}
}
}