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Cancel TrackingShape by pressing ESC key

#1

I am trying to build some functionality that allows the user to cancel a trackshape operation by pressing the ESC key.  There are no errors thrown, but the trackshape operation does cancel.  I am testing it with TrackMode.Polygon


 


 



void winformsMap1_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.KeyCode==Keys.Escape)
            {
                cancelUserShape = true;
                BaseShape bs =  winformsMap1.TrackOverlay.GetTrackingShape();
                TrackOverlay_TrackEnding(sender,new TrackEndingTrackInteractiveOverlayEventArgs(bs,true));                     winformsMap1.Refresh();
            }
        }

        void TrackOverlay_TrackEnding(object sender, TrackEndingTrackInteractiveOverlayEventArgs e)
        {
            if (cancelUserShape)
            {
                e.Cancel = true;
                cancelUserShape = false;
            }
           
        }


#2

Ed, 


Thanks for your post!
 
1. Try the following codes, hopefully it is what you are trying to do.

        private void Form1_Load(object sender, EventArgs e)
        {
            winformsMap1.TrackOverlay.TrackMode = TrackMode.Polygon;
        }

        private void TrackOverlayTrackEnding()
        {
            if (cancel)
            {
                winformsMap1.TrackOverlay.Lock.EnterWriteLock();
                try
                {
                    int count = winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures.Count;
                    if (count > 0)
                    {
                        winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures.Remove("InTrackingFeature");
                    }
                    //winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures.Add(new Feature(e.Shape));
                }
                finally
                {
                    winformsMap1.TrackOverlay.Lock.ExitWriteLock();
                }

                cancel = false;
                if (winformsMap1.TrackOverlay.TrackMode == TrackMode.Polygon || winformsMap1.TrackOverlay.TrackMode == TrackMode.Line)
                {
                    winformsMap1.TrackOverlay.MouseDoubleClick(new InteractionArguments());
                }
                else
                {
                    winformsMap1.TrackOverlay.MouseUp(new InteractionArguments());
                }

                winformsMap1.Refresh();
            }
        }

        private void winformsMap1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
            {
                cancel = true;
                TrackOverlayTrackEnding();
            }
        }

2. You can create your own TrackInteractiveOverlay to achieve this. 


Any more questions just let me know.
 
Thanks.
 
Yale

#3

Worked perfectly. 
  
 Thanks for the help. 
  
 Ed

#4

Ed, 
  
 You are welcome. 
  
 Let me know if any more problems. 
  
 Thanks. 
  
 Yale