javascript - How can I restricting grouping and draging inside a Kendo UI treeView -

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i got kendoui treeview this:

enter image description here

at moment possible switch first level elements via drag , drop (group, rect-1.., line, text) should not possible group elements, drag elements inside group outside group. should possible switch elements inside group , switch elements on first level.

how can that?

i trying answer , hope meet exact behavior want

it should not possible group elements, drag elements inside group outside group

  • by i'm guessing want element/node can't change it's level (first if condition)

it should possible switch elements inside group

  • by i'm guessing want inside 2nd element on each 1st element, cannot switch parent (first if condition)

  • my (second if condition) doesn't allow create 3rd element dragging 2nd element on 2nd element

  • my (third if condition ) allow moving 1st element , comment i'm not sure mean allowing first element change

add drop function treeview, add code :

drop: function(e) {       var data = $('#treeview-left').data('kendotreeview').dataitem(e.sourcenode);       var newdata = $('#treeview-left').data('kendotreeview').dataitem(e.destinationnode);        // not allow changing levels       if (data.parent() != newdata.parent() ) {          console.log("do not allow changing levels");          e.setvalid(false);       }       // not allow adding leaf node       if (!newdata.haschidren && e.dropposition == "over") {          console.log("do not allow adding leaf node");          e.setvalid(false);       }        //only allow 1st level element drag drop not 2nd element       //if (data.parent()){       //   console.log("only allow 1st parent drag drop");       //   e.setvalid(false);      // }  },

kendo dojo


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