private void ApplyTransform(ITransform transform, IGraphicsElement graphicsElement)
{
if (transform is IRotateTransform rotateTransform)
{
double centerX = graphicsElement.Left + rotateTransform.CenterX;
double centerY = graphicsElement.Top + rotateTransform.CenterY;
skCanvas.RotateDegrees((float)rotateTransform.Angle, (float)centerX, (float)centerY);
}
else if (transform is IScaleTransform scaleTransform)
{
double centerX = graphicsElement.Left + scaleTransform.CenterX;
double centerY = graphicsElement.Top + scaleTransform.CenterY;
skCanvas.Scale((float)scaleTransform.ScaleX, (float)scaleTransform.ScaleY, (float)centerX, (float)centerY);
}
else if (transform is ITranslateTransform translateTransform)
{
skCanvas.Translate((float)translateTransform.X, (float)translateTransform.Y);
}
else if (transform is ITransformGroup transformGroup)
{
foreach (ITransform childTransform in transformGroup.Children)
{
ApplyTransform(childTransform, graphicsElement);
}
}
else
{
throw new InvalidOperationException($"Unknown transform type {transform.GetType()}");
}
}
private void canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Point mousePos = e.GetPosition(canvas);
Point globalPoint = new Point((mousePos.X / canvasSize.X) * canvasPos.Width + canvasPos.Left, (mousePos.Y / canvasSize.Y) * canvasPos.Height + canvasPos.Top);
IGraphicsElement selected = null;
double x = globalPoint.X - DX / 2;
double y = globalPoint.Y - DY / 2;
IGraphicsElement element;
elements.Reset();
while (elements.Next(out element))
{
if (element.IO == null)
{
continue;
}
Rect aabb = element.AABB;
Point center = new Point(aabb.Left + aabb.Width / 2, aabb.Top + aabb.Height / 2);
double dx = center.X - x;
double dy = center.Y - y;
if (dx >= 0 && dx < DX && dy >= 0 && dy < DY)
{
selected = element;
break;
}
}
if (selected == null)
{
return;
}
new ElementWindow(selected.IO.GID, client)
{
Owner = this
}.Show();
}
