Hello Florian,
Thank you for writing.
Yes, that would be possible and for the purpose, you will need to create a custom DraggingService to manage the special drag operation. The implementation below introduces a new DragMode property with which you should be able to control whether the
Drag operation will be performed in a horizontal, vertical or both directions:
public partial class Form1 : Form
{
private CustomDraggingService dragService;
public Form1()
{
InitializeComponent();
this.dragService = new CustomDraggingService(this.radDiagram1.DiagramElement) { DragMode = DragMode.Horizontal };
this.radDiagram1.DiagramElement.ServiceLocator.Register<IDraggingService>(this.dragService);
this.radButton1.Click += RadButton1_Click;
//Setup diagram and add shapes
}
private void RadButton1_Click(object sender, EventArgs e)
{
this.dragService.DragMode = this.dragService.DragMode == DragMode.Horizontal ? DragMode.Vertical : DragMode.Horizontal;
}
}
public class CustomDraggingService : DraggingService
{
private Telerik.Windows.Diagrams.Core.Point startDragPoint;
private DragMode dragMode = DragMode.Both;
public CustomDraggingService(IGraphInternal graph)
: base(graph)
{ }
public DragMode DragMode
{
get
{
return this.dragMode;
}
set
{
this.dragMode = value;
}
}
public override void InitializeDrag(Telerik.Windows.Diagrams.Core.Point point)
{
this.startDragPoint = point;
base.InitializeDrag(point);
}
public override void Drag(Telerik.Windows.Diagrams.Core.Point newPoint)
{
Telerik.Windows.Diagrams.Core.Point dragPoint = newPoint;
if (this.DragMode == DragMode.Horizontal)
{
dragPoint = new Telerik.Windows.Diagrams.Core.Point(newPoint.X, this.startDragPoint.Y);
}
else if (this.DragMode == DragMode.Vertical)
{
dragPoint = new Telerik.Windows.Diagrams.Core.Point(this.startDragPoint.X, newPoint.Y);
}
base.Drag(dragPoint);
}
}
public enum DragMode
{
Both,
Horizontal,
Vertical,
}
I am also attaching a short video showing the result on my end.
Regards,
Hristo
Progress Telerik