Hi Noah,
Thank you for contacting us.
We do not have such a control in our suite so far. We do have a feature request for image editor control which seems to be related. If you find it useful, feel free to vote for it here:
http://www.telerik.com/support/pits.aspx#/details/Issue=15947.
However, you can easily implement a custom control which can support the
Rubber Band Selection. I have made a small example of such control. Here is the code for it:
[Browsable(true)]
public class RubberBandSelectionControl : RadControl
{
private RubberBandSelectionElement rubberBandSelectionElement;
protected override void CreateChildItems(RadElement parent)
{
this.rubberBandSelectionElement = new RubberBandSelectionElement();
parent.Children.Add(this.rubberBandSelectionElement);
}
protected override Size DefaultSize
{
get
{
return new Size(200, 300);
}
}
}
public class RubberBandSelectionElement : LightVisualElement
{
private bool isMouseDown;
private Point startingPoint;
private Point currentPoint;
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button == MouseButtons.Left)
{
this.isMouseDown = true;
this.startingPoint = Control.MousePosition;
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
this.isMouseDown = false;
this.currentPoint = Point.Empty;
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (this.isMouseDown)
{
if (this.currentPoint != Point.Empty)
{
this.DrawRectangle(this.startingPoint, this.currentPoint);
}
this.currentPoint = Control.MousePosition;
this.DrawRectangle(this.startingPoint, this.currentPoint);
}
}
private void DrawRectangle(Point startingPoint, Point endingPoint)
{
Rectangle rect = new Rectangle();
if (startingPoint.X < endingPoint.X)
{
rect.X = startingPoint.X;
rect.Width = endingPoint.X - startingPoint.X;
}
else
{
rect.X = endingPoint.X;
rect.Width = startingPoint.X - endingPoint.X;
}
if (startingPoint.Y < endingPoint.Y)
{
rect.Y = startingPoint.Y;
rect.Height = endingPoint.Y - startingPoint.Y;
}
else
{
rect.Y = endingPoint.Y;
rect.Height = startingPoint.Y - endingPoint.Y;
}
ControlPaint.DrawReversibleFrame(rect, Color.Black, FrameStyle.Dashed);
}
}
You can drag it on a form, setup its BackgroudImage property and start making rectangles.
I hope this helps.
Regards,
George
Telerik
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