ListBox multiple selection

[Czar-Ec]

Hello, I have been reading the ListBox code and I have been looking up other examples of its use but I'm still getting confused about how it is used.

I want to be able to have a listbox's source array be programmatically filled and then to also be able to select more than one option from the listbox.

Is it possible you (or anyone) could show me an example if not, explain how to achieve this at least?

[ocornut]

To create a custom listbox you only need to do:

if (ListBoxHeader(...))
{
  // display your items here, using e.g. Selectable()
}
ListBoxFooter();

So the programmatic filling is up to you, as well as the selection state which is stored on your side (when calling Selectable() you specify yourself is the item is selected). In the demo windows under Widgets: Selectables there are a handful of examples with persistent selection, and I have just updated the imgui_demo.cpp code now to add a few extra examples.

So assuming you have a list says vector<MyObj*>.
You may want to store your selection state either inside each object e.g. bool IsSelected, either externally Vector<MyObj*> ListOfSelectedObjects;. There are pros and cons to each methods.

Note that ListBoxHeader()/ListboxFooter() are legacy names and I expect to rename them to BeginListBox()/EndListBox() at some point. This should not really affect you at all.

[ocornut]

Closing this as answered.