Hello Davide,
If you want to keep the size ratio on multi resize you'll have to add some more custom logic to the resizing service:
public class MyResizing : ResizingService
{
private Rect adornerBounds;
private double sizeRatio;
public MyResizing(RadDiagram graph)
: base(graph)
{ }
public override void InitializeResize(IEnumerable<IDiagramItem> newSelectedItems, double adornerAngle, Rect adornerBounds, ResizeDirection resisingDirection, Point startPoint)
{
base.InitializeResize(newSelectedItems, adornerAngle, adornerBounds, resisingDirection, startPoint);
this.adornerBounds = adornerBounds;
this.sizeRatio = this.adornerBounds.Width / this.adornerBounds.Height;
}
protected override System.Windows.Point CalculateNewDelta(System.Windows.Point newPoint)
{
var newDelta = base.CalculateNewDelta(newPoint);
double newOffset = Math.Max(newDelta.X, newDelta.Y);
double newXDelta = this.sizeRatio > 1 ? newOffset * this.sizeRatio : newOffset;
double newYDelta = this.sizeRatio > 1 ? newOffset : newOffset / this.sizeRatio;
if (newOffset < 0)
{
newXDelta = Math.Max(-this.adornerBounds.Width, newXDelta);
newYDelta = Math.Max(-this.adornerBounds.Height, newYDelta);
}
return new Point(newXDelta, newYDelta);
}
}
With this code the multi resize should work as you want it to so could you please try it out and if you need more help feel free to ask.
Regards,
Zarko
Telerik