directus/app/src/composables/groupable

useGroupable / useGroupableParent

Can be used to make a selectable group of items within a parent container. This is used to facilitate the functionality of the v-item-group base component, and other groupable components like detail-group, button-group.

Usage

Use the useGroupableParent function in a parent component that will contain one or more components in it's slots (deeply nested or not) that use the useGroupable composables.

useGroupableParent(state: GroupableParentState, options: GroupableParentOptions, group: string): void

The useGroupableParent composition accepts two paremeters: state and options. State includes a selection key that can be used to pass an array of selected items, so you can manage this active state from the parent context. The onSelectionChange property of state is a callback function that fires whenever the selection changes from a child groupable item.

The options parameter can be used to set some behavioral options for the selection logic. These options include multiple: boolean, max: number, mandatory: boolean.

import { defineComponent } from '@vue/composition-api';
import { useGroupableParent } from '@/composables/size-class/';

export default defineComponent({
	props: {
		...sizeProps
	},
	setup(props) {
		useGroupableParent(
			{
				selection: selection,
				onSelectionChange: newSelectionValues => emit('input', newSelectionValues)
			},
			{
				multiple: multiple,
				max: max,
				mandatory: mandatory
			}
		);
	}
});

The optional group parameter allows you to control to what group this parent is registered. This can be useful when you have complexly nested groups.

useGroupable(value: string | number | undefined, group: string): { active: Ref<boolean>; toggle: () => void; }

Registers this component as a child of the first parent component that uses the useGroupableParent component.

The useGroupable composition accepts a single parameter (value) that will be used in the selection state of the groupable parent. The composition returns an object with the active state, and a function that will toggle this component's active state in the parent's selection.

import { defineComponent } from '@vue/composition-api';
import { useGroupable } from '@/composables/groupable';

export default defineComponent({
	setup(props) {
		const { active, toggle } = useGroupable('unique-value-for-this-item');
		return { active, toggle };
	}
});

The optional group parameter allows you to control to what group this child is registered. This can be useful when you have complexly nested groups.