Feature Request: Checkbox on non-leaf, to uncheck/check all descendants. about leaflet.control.layers.tree HOT 6 CLOSED

I would also like this option

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Thanks @MappingSteve for you suggestion.
As you are realizing, it has not a simple solution. I have been thinking about that, and:

• Detecting if child layers are activated/deactivated out of the tree (you can do it in your javascript due to whatever other reason) is not that easy and entangles the code.
• There are many opinions on how the control (checkbox) should look like. And where should be placed.
• There are opinions on how the control should behave (the tree states you mention, for instance).

I am thinking on adding a callback that lets you manage it and easily change your state (checkbox of your choice) and activate or deactivate layers. It is not going to be just a boolean in the options... you will have to code a bit (don't worry, I'll add an example)
I will link "soon" a PR here.

PS: GitHub does not notify me when you edit your comment.

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Please check if my solution is ok.: #13

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Thanks @astridx . Unfortunately your PR #13 was too slow in the example you added (it does recreate the full tree for every single node). I looked for a faster solution in this PR: #14
It also lets you add it on any node(s) you want, and use the HTML you prefer.
Still needs documentation and tests. You can start having a look to the tests.

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@MappingSteve @astridx
I founded a better solution. Now you just have to add the option selectAllCheckbox: true to the nodes where you want that feature (probably on all with children). Look at the examples.
I have already merged #14 into master. I will make a release soon.

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Thank you very much @jjimenezshaw

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