extjs-gpl
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GPL licensed version of Sencha Ext JS
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<title>Tree Custom Drop Logic Example</title>
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<h1>Custom Tree Drop Logic</h1>
<p>This example shows how to apply custom logic to valid dropping on nodes</p>
<p>
<ul>
<li>Child 1 can be dropped on both nodes.</li>
<li>Child 2 can be dropped only on the first node.</li>
<li>Child 3 can be dropped only on the second node.</li>
<li>Child 4 cannot be dropped on either node.</li>
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<p>The js is not minified so it is readable. See <a href="custom-drop-logic.js">custom-drop-logic.js</a>.</p>
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