How Can I add a Custom Panel, However i want to perform a drag event when a item from the panel drag to task
Hello Subhasis,
You can add the panel by specifying a custom HTML content in the layout config:
https://docs.dhtmlx.com/gantt/desktop__layout_config.html#htmlasinnerview
Here is an example of how it might work:
https://snippet.dhtmlx.com/99eeea07b
Then you need to add a function that will allow you to drag elements into Gantt and add tasks after that. Here is another snippet with that function:
https://snippet.dhtmlx.com/e4622f917
If you combine those snippets, you might get something like this:
http://snippet.dhtmlx.com/43a8c5a72
After you drag a picture into the grid, a new task will be added.