What is the best way to customize the appearance of an Angular tree component?

I'm attempting to incorporate the style of the ACE Admin theme into the angular-tree-component.

Currently, my tree looks like this:

https://i.sstatic.net/ktiEf.png

However, I desire to apply styles from the Angular tree guide in order to achieve a tree like this:

https://i.sstatic.net/60RPu.png

The process can be accomplished by following The Angular tree guide. The guide suggests that if you want a tree with plus and minus signs using the ACE Admin theme, then:

Wrap your tree with a class, add your custom styles to your style.scss file, and ensure all custom rules are under your custom class - that's it!

To adhere to this guidance, I have established a .ace style (Wrapping your tree with a class, as per the guide):

.ace { }

Subsequently, I placed all elements of the ACE Admin theme style inside the .ace class (

Including all custom rules under your custom class
as guided):

.ace div.tree {
     padding-left: 0;
     margin-left: -5px
}
...

and applied it to my tree:

 <tree-root 
  [ngClass]="'ace'"
  [nodes]="nodes"
  [options]="options"
></tree-root>

While it seems straightforward, I am unable to implement the Ace Admin Style. Apologies for my limited CSS knowledge.

To demonstrate what I've done so far, I've created a plunker. Although the basic styling is in place, the ACE Admin theme remains unapplied.

What could I be overlooking?

Answer №1

To ensure the proper tree display, be sure to assign the class expand-tree to all trees and apply the specific styling to div.angular-tree-component.

For a practical example of this implementation, you can visit this Plunker link.

The complete CSS style structure is as follows:

.expand-tree .tree-children.tree-children-no-padding { padding-left: 0 }
.expand-tree .tree-children { padding-left: 20px; overflow: hidden }
... (Additional CSS styles omitted for brevity)

Including the root node:

<tree-root 
  [ngClass]="expand-tree"
  [nodes]="nodes"
  [options]="options"
></tree-root>

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