如何在不同情况下使用dojo dnd

Question

I am struggling with both the documentation of dojo and the information online to get to a solution for what i need, hoping for your help.

I am Implementing a DND from a grid to a source or a target:

new dojox.grid.enhanced.plugins.GridSource(dojo.byId("songForm"), {
                    isSource: false,
                    insertNodesForGrid: false
                });

But i am not inserting anything in that target i am using the onDropGridRows listner to create my own value which is a button and insert it in another div that has a normal dnd activated (calpanel) in it:

   dojo.connect(formTarget, "onDropGridRows", lang.hitch(this,function (grid, rowIndexes) {

   var s = grid.store,
                        row = rowIndexes[0];

                    // html.set(dom.byId("calPanel"), "<div id='calButton_" + s.getValue(grid.getItem(row), "elementid") + "'></div>");
                    // domConstruct.place("<div id='calButton_" + s.getValue(grid.getItem(row), "elementid") + "'></div>", "ElementsCalculator", "last");
                    new dijit.form.Button({
                        label: s.getValue(grid.getItem(row), "pagename") + ":" + s.getValue(grid.getItem(row), "col") + ":" + s.getValue(grid.getItem(row), "row"),
                        class: 'dojoDndItem',
                        onClick: function () {

                        }
                    }).placeAt("calPanel");
                    if (source != null) {
                          source.destroy();
                    }

                    source = new dojo.dnd.Source("calPanel", {
                        copyOnly: false
                    });
    }

two problems i am facing here :

1) the songForm panel which should be only a target from a grid is also running as a target from a regular dnd source, how can i stop that from happening ?

2) the listener I implemented as shown below is listening for any DND action not just the node i supplied do you have any idea why?

  dojo.connect(source, "onDndDrop", lang.hitch(this,function (grid, rowIndexes) {}

Answer 1

An example based on my earlier comment...

checkAcceptance: function (source, nodes) {
    if (source intanceof yourGridClass) {   
        return true;
    }

    // You may need to use this.inherited(arguments) here
    return false;
}

checkAcceptance would go in your songForm code.

For your second question, I've found that to be the case as well. I don't know why it is, but it's very easy to deal with by using checkAcceptance and checkItemAcceptance . checkItemAcceptance is similar to checkAcceptance . The difference is you've already determined your target can accept something from the source, but now you're checking to see if the particular item you're dropping can be accepted.

I hope this helps.