Allow element to move but it has to stay attached

[TestUser]

Hello everyone!

I tried to implement a rule where I allow to move boundary elements along the boundary but it is not allowed to be not attached anymore. So every event has to be attached.
I tried the following:

function canMove(context){
    var shapes = context.shape,
        target = context.target,
        source = context.source,
        position = context.position;
    var businessObject = context.shapes[0].businessObject;
	
    if(target != undefined){
      var targetBusinessObject = target.businessObject;
      console.log(context.shapes[0].host);
      if(context.shapes[0].type === 'bpmn:BoundaryEvent' && (context.shapes[0].host === 'undefined' || context.shapes[0].host === null || context.shapes[0].host)) {
      //if(is(context.shapes[0], "bpmn:BoundaryEvent")){

          return false;
    }}
  }  


  this.addRule('elements.move', 4000, function(context) {
    return canMove(context);  
  });

The problem is that this code forbids the complete movement of events. Has anyone any idea how I can fix it?

[Martin]

Hi @TestUser ,

When you mention moving, do you mean moving with the arrow keys? Than this is the related issue on github:

Intermediate error catch event can be created via arrow keys element movement

Unfortunately, the Keyboard Move Selection does not handle attachments at all at the moment. The fix for this is unfortunately a bit more complicated than a rule.

If you want, have a look at the issue. We are always happy about community contributions