SGDK2 map editor crashing issues

[durnurd]

I know you just said you wanted to release SGDK2.  BUT:

• There's nothing stopping a user from creating a layer of size 0,0.  Opening the editor for that layer causes the app to repeatedly throw a division-by-zero error and you can't continue.
  
• There's no way to re-make the Designer Background layer.  You can't specify nothing for the tileset.
  
• On my machine at least, it crashes whenever you try to open a layer editor when another one is already open (or when you try to open an animation preview when a layer editor is open).  Essentially, only one at a time, or it throws the following two errors:
  
  System.NullReferenceException: Object reference not set to an instance of an object.
     at OpenTK.GLControl.MakeCurrent()
     at SGDK2.Display.OnResize(EventArgs e)
     at ...
  
  System.ComponentModel.Win32Exception: Error creating window handle.
     at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)
     at System.Windows.Forms.Control.CreateHandle()
     at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
     at System.Windows.Forms.Control.CreateControl()
     at OpenTK.GLControl.ValidateState()
     at ...
  

On these ones you can continue, just close the other window first and you can re-open the new one and it works fine.  But it's probably something that should be handled.

[bluemonkmn]

I can't get any error when creating a layer of size 0,0.  Can you identify the line of code that's generating the error?

[durnurd]

After more testing, I found that it only crashes when the layer size is 0,0 and the virtual size is not

[bluemonkmn]

Thanks, that clears that up.  I'll just add an error message to prevent creating layers where SizeInTiles is zero.