Issue
getBookOutlineBar
method will take a list of nodes and the selected node which needs to be selected when sidebar of outline opens.
I have implemented expand method to expand all parent node but it is only expanding one particular node, not all parent nodes.
If page "Heading" is opened and I click on outline sidebar than all parent nodes should be expanded and heading should be selected.
I have used nested tree control of mat tree in angular 8: see Stackblitz example
getBookOutlineBar() {
let customURL = '';
this.bookService.GetBookOutlineBar(this.bookId, location.hash).subscribe(data => {
this.dataSource.data = data.list;
if (data.selectedNode != null) {
this.selectedNode = data.selectedNode;
this.treeControl.collapseAll();
this.expand(this.dataSource.data, this.selectedNode.UniqueId);
}
})
}
expand(data: BookOutlineBar[], uniqueId: string): any {
data.forEach(node => {
if (node.Children && node.Children.find(c => c.UniqueId === uniqueId)) {
this.treeControl.expand(node);
this.expand(this.treeControl.dataNodes, node.UniqueId);
}
else if (node.Children && node.Children.find(c => c.Children)) {
this.expand(node.Children, uniqueId);
}
});
}
I want to expand all parent nodes of selected node like in this image:
Solution
Your code
if (node.Children && node.Children.find(c => c.UniqueId === uniqueId)) {
this.treeControl.expand(node);
this.expand(this.treeControl.dataNodes, node.UniqueId);
}
Replace with
if (node.Children && node.Children.find(c => c.UniqueId === uniqueId)) {
this.treeControl.expand(node);
this.expand(this.dataSource.data, node.UniqueId);
}
Answered By - Krupit Patel
0 comments:
Post a Comment
Note: Only a member of this blog may post a comment.