cancel drop event

[fother]

I select one item and drag.. but when I will drop I need validate if can...

If I use e.doit = false, but don't work.. any suggest?



final TreeDragSource source = new TreeDragSource(binder);
source.addDNDListener(new DNDListener() {
@Override
public void dragStart(DNDEvent e) {

TreeItem item = tree.findItem(e.getTarget());
item.setLeaf(true);
if (item != null && item == tree.getRootItem().getItem(0) && tree.getRootItem().getItemCount() == 1) {
e.doit = false;
e.status.setStatus(false);
return;
}
super.dragStart(e);

}

@Override
public void dragDrop(DNDEvent e) {
e.doit = false;
e.status.setStatus(false);
}
});

[shermdog01]

I'm doing something similar to this but am using dragEnter on the target.

Here is an example from my app which prevents a duplicate item from being dropped into my list. (It's been sanitized a bit..)



myTarget.addDNDListener(new DNDListener() {
public void dragEnter(DNDEvent e) {
e.doit = false;
//Prevent duplicate entries
if (myList.getItemCount() > 0){
ModelData smd = view.getSelectionModel().getSelectedItem();
for(int i = 0; i < myList.getItemCount(); i++){
ModelData md = myStore.getAt(i);
if(smd.get("Id").equals(md.get("Id"))){
System.out.println("Match!");
//break;
return;
}
}
} else {
e.doit = true;
}
e.doit = true;
}
});

[fother]

thanks for your reply.. but don't work for me..



final TreeDropTarget target = new TreeDropTarget(binder);
target.setAllowSelfAsSource(true);
target.setFeedback(Feedback.BOTH);
target.setAutoExpand(false);

target.addDNDListener(new DNDListener() {

@Override
public void dragEnter(DNDEvent e) {
e.doit = false;
e.status.setStatus(false);
}
});

[fother]

I need for example that in this example http://www.extjs.com/explorer/#reorderingtree I can't add items in "Misc" item.

[fother]

this method is called when the cursor pass into a node..



final TreeDropTarget target = new TreeDropTarget(binder) {

@Override
protected void handleAppend(DNDEvent event, TreeItem item) {

boolean test = false;
if (test) {

super.handleAppend(event, item);
} else {
event.doit = false;
event.status.setStatus(false);
return;
}

}

};

[martyphee]

I'm looking for a way to do this also. How can I prompt a user for a confirmation and if they select No stop the DND event. Where should this be done. I haven't been able to find the correct location to do this.