I'm trying to add a simple 'confirm to remove dialog' on my mxgraph based app, but can't keep the remove event from actually happening when I want to cancel it. So far, I'm listening to mxEvent.REMOVE_CELLS, in my simplest approach I tried something like:
graph.addListener(mxEvent.REMOVE_CELLS, (sender, evt) => {
evt.consume();
});
As far as I know, consume should keep the event from propagating, and as I understood to have effect at all, but the nodes are deleted no matter what. I even tried to undo immediatelly after the event, and still not working.
Is there even a straight forward way to keep an event from happening and apply a different logic instead
Finally, I ended up overriding mxGraph.removeCells to fire my own custom event, looks something like:
mxGraph.prototype.removeCells = function(cells, includeEdges) {
...
if (shouldntRemoveDirectly) {
this.fireEvent(new mxEventObject('beforeRemoveLoop', 'cells', cells, 'includeEdges', includeEdges));
return;
}
...
}