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TreeSelect: Custom Workaround for Programmatic Selection
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export const CUSTOM_TREESELECT_VALUE_ACCESSOR: any = { | |
provide: NG_VALUE_ACCESSOR, | |
useExisting: forwardRef(() => CustomTreeSelectComponent), | |
multi: true | |
}; | |
interface TreeNodeEvent { | |
originalEvent: Event; | |
node: TreeNode<any>; | |
children: []; | |
key: string; | |
} | |
@Component({ | |
selector: 'cx-custom-treeselect', | |
templateUrl: './custom-treeselect.component.html', | |
styleUrls: ['./custom-treeselect.component.scss'], | |
changeDetection: ChangeDetectionStrategy.OnPush, | |
providers: [CUSTOM_TREESELECT_VALUE_ACCESSOR], | |
encapsulation: ViewEncapsulation.None | |
}) | |
export class CustomTreeSelectComponent extends TreeSelect implements AfterContentInit { | |
iconTypes = ICON_TYPE; | |
listId: string = ''; | |
@Input() ariaLabel: string | undefined; | |
@Input() isParentVisible: boolean = true; | |
nodes: any; | |
override writeValue(value: any): void { | |
if (value != null) { | |
this.value = this.getNodesFromOptions(value, this.options); | |
this.nodes = this.isParentVisible ? this.value : this.removeParentSelection(this.value); | |
this.checkParentIfChildrenSelected(this.options); | |
this.cd.markForCheck(); | |
} | |
} | |
getNodesFromOptions(nodesToFind: any[], options: TreeNodeEvent[]): any[] { | |
let nodes: any[] = []; | |
nodesToFind.forEach((nodeToFind) => { | |
options.forEach((option) => { | |
if (option.key === nodeToFind.key) { | |
nodes.push(option); | |
} | |
if (option.children && option.children.length > 0) { | |
nodes = nodes.concat(this.getNodesFromOptions([nodeToFind], option.children)); | |
} | |
}); | |
}); | |
return nodes; | |
} | |
checkParentIfChildrenSelected(nodes: TreeNodeEvent[]): void { | |
nodes.forEach((node: any) => { | |
if (node.children && node.children.length > 0) { | |
this.checkParentIfChildrenSelected(node.children); | |
const allChildrenSelected = node.children.every((child: any) => { | |
return this.value.some((selectedNode: any) => selectedNode.key === child.key); | |
}); | |
const partialChildrenSelected = node.children.some((child: any) => { | |
return this.value.some((selectedNode: any) => selectedNode.key === child.key) || child.partialSelected; | |
}); | |
node.partialSelected = partialChildrenSelected && !allChildrenSelected; | |
if (allChildrenSelected && !this.value.some((selectedNode: any) => selectedNode.key === node.key)) { | |
this.value.push(node); | |
} | |
} | |
}); | |
} | |
} |
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