Add text tooltip for TabBar & TabContainer

[4d49]

Describe the project you are working on

Data editing tool.

Describe the problem or limitation you are having in your project

Currently, TabBar does not show text tooltips for tabs. It would be useful to be able to set custom text tooltips.

Also it would be useful to display a text tooltip with the tab title if the max tab width limit is set and the title does not fit.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Need to override the get_tooltip method and add two new set_tab_tooltip & get_tab_tooltip methods to TabBar.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

String TabBar::get_tooltip(const Point2 &p_pos) const {
	for (int i = 0; i < tabs.size(); i++) {
		if (tabs[i].hidden) {
			continue;
		}

		if (get_tab_rect(i).has_point(p_pos)) {
			if (tabs[i].tooltip.is_empty()) {
				return tabs[i].text;
			}

			return tabs[i].tooltip;
		}
	}

	return Control::get_tooltip(p_pos);
}

If this enhancement will not be used often, can it be worked around with a few lines of script?

Yes. It is possible to inherit from TabBar and override the _get_tooltip method.

Is there a reason why this should be core and not an add-on in the asset library?

No.