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Jaba · #1 (**permalink**) 01-11-2005

Hi, As shapes that are programmatically added can be moved by the user with the mouse, I wonder if it is possible to ice the shapes so that the user cannot move it ?

Do you know if that is possible and how ? (without having to copy/paste the map on a picturebox

)

**Wilfried** · #2 (**permalink**) 01-11-2005

Hi,

Yes it sure is possible. On this forum you find an article how to make pushpins inmoveable. Same trick could be used for shapes I suppose. http://www.mp2kmag.com/a97--pushpins....mappoint.html Check also what has been discussed here: http://www.mp2kmag.com/mappoint/disc...pic.asp?t=4315

Jaba · #3 (**permalink**) 01-11-2005

Thanks. I've taken a look at these threads and they are interesting.

In order to prevent the user from moving pushpins and shapes I've tried the following code but I alway get a "Stack Overflow" error from the C# runtime :

Code:

		private void axMappointControl1_SelectionChange(object sender, AxMapPoint._IMappointCtrlEvents_SelectionChangeEvent e)
		{
// I don't cast anything here because I consider any selection to be a shape or pushpin
			MapPoint.Shape sp;
			MapPoint.Location loc;
			try
			{
				loc = axMappointControl1.ActiveMap.GetLocation(80,0,0);
				sp = axMappointControl1.ActiveMap.Shapes.AddShape(MapPoint.GeoAutoShapeType.geoShapeRectangle,loc,1,1);
				sp.Select();
				sp.Delete();
			}
			catch(Exception)
			{

			}
		}

the error is :
An unhandled exception of type 'System.StackOverflowException' occurred in axinterop.mappoint.dll

**Wilfried** · #4 (**permalink**) 01-11-2005

Hi,

Code:

sp.Select();

This is the quilty one

When Select is called the while function will be re-entered, again and again until the stack flows over

You have to set a busy flag on entering the function an first check if it is true, if true then exit. When the function exit you set the flag again to false.

Do not put the flag on the stack.

something like this will do:

Code:

            if (!select_change_busy) {
                select_change_busy = true;
                // here the code
                select_change_busy = false;
            }

In the article it was with the mousebutton I think. But it is similar.

Jaba · #5 (**permalink**) 01-11-2005

Great !!!! Thank you mister Wilfried !!!

Let's share this wonderful tip

:

Code:

		bool select_change_busy = false;
		
		private void axMappointControl1_SelectionChange(object sender, AxMapPoint._IMappointCtrlEvents_SelectionChangeEvent e)
		{
			if (!select_change_busy)
			{
				select_change_busy=true;
				MapPoint.Shape sp;
				MapPoint.Location loc;

				try
				{
					loc = axMappointControl1.ActiveMap.GetLocation(80,0,0);
					sp = axMappointControl1.ActiveMap.Shapes.AddShape(MapPoint.GeoAutoShapeType.geoShapeRectangle,loc,1,1);
					sp.Select();
					sp.Delete();
				}
				catch(Exception)
				{

				}

				select_change_busy=false;
			}
		}

**Wilfried** · #6 (**permalink**) 01-11-2005

Hi Jaba,

Thanks for the feedback. Doing so other can benefit from it also

Tip: You can put code between tags, then it is nice formatted and ident

Jaba · #7 (**permalink**) 01-12-2005

Hi Wilfried...

You're welcome

Now I want to deactivate the moving of shapes only, because with the source code above this also deactivates the viewing of pushpins' labels

I've tried the following to deactivate the moving of shapes only but I can't understand why it does not work as I would like it to ?

Code:

		bool select_change_busy = false;
		private void axMappointControl1_SelectionChange(object sender, AxMapPoint._IMappointCtrlEvents_SelectionChangeEvent e)
		{
			if (!select_change_busy)
			{
				select_change_busy=true;
				MapPoint.Shape sp;
				MapPoint.Location loc;
				MapPoint.Shape sp2;

				try
				{
					sp2 = (MapPoint.Shape) e.pNewSelection;
					loc = axMappointControl1.ActiveMap.GetLocation(80,0,0);
					sp = axMappointControl1.ActiveMap.Shapes.AddShape(MapPoint.GeoAutoShapeType.geoShapeRectangle,loc,1,1);
					sp.Select();
					sp.Delete();
					sp2=null;
				}
				catch(Exception)
				{
				}

				select_change_busy=false;
			}
		}

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How to make shapes unmoveable ?

How to make shapes unmoveable ?

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