public void ScaleContent(Point scalePoint, bool zoomIn, double amount)
{
if (child != null)
{
var st = GetScaleTransform();
var tt = GetTranslateTransform();
double zoom = zoomIn ? .2 * amount : -.2 * amount;
if (!zoomIn && (st.ScaleX < .4 || st.ScaleY < .4))
{
return;
}
double absoluteX;
double absoluteY;
absoluteX = scalePoint.X * st.ScaleX + tt.X;
absoluteY = scalePoint.Y * st.ScaleY + tt.Y;
if ((st.ScaleY + zoom <= maxZoom) && (st.ScaleY + zoom >= minZoom))
{
st.ScaleX += zoom;
st.ScaleY += zoom;
tt.X = absoluteX - scalePoint.X * st.ScaleX;
tt.Y = absoluteY - scalePoint.Y * st.ScaleY;
OnUpdateTransform?.Invoke(this);
}
}
}
public void TranslateContent(Vector translateVector)
{
if (child != null)
{
var st = GetScaleTransform();
var tt = GetTranslateTransform();
tt.X = origin.X - translateVector.X;
tt.Y = origin.Y - translateVector.Y;
OnUpdateTransform?.Invoke(this);
}
}