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@bolduh/svelte-nested-accordion

v0.2.1

Published

Simple tree view component.

Downloads

104

Readme

This is not relevant !

wait for a real release and readme

demo

svelte-nested-accordion

installation

npm i @bolduh/svelte-Accordion

usage

<Accordion emptyTreeMessage="nothing to show" selectable root={root} childrenAccessor={accessor} nodeTemplate={Node} filter={nodefilter} ></Accordion>

The Accordion display a tree data structure that must inherit from TVNode

export interface TVNode {
    children : TVNode[]; // list of children (may be undefined if no children)
    id:any; // unique identifier
}

We will assume that NodeType is the node type of our Accordion for now on.

Accordion attributes:

  • root (NodeType): the full tree datastructure
  • emptyTreeMessage (string) : message to display when filter do not return any node
  • selectable (boolean, default is false) : if set add checkbox in front of every node/leaf
  • nodeTemplate : a svelte component used to render nodes and leafs. it must accept an attribute data of the node type (NodeType)
  • filter ((node:NodeType, filter:string ) => boolean ): a function used to filter nodes on a simple text input. if not set no search widget is displayed. returns true if the node matches the filter.
  • for custom filters. The Accordion can accept custom filters. A filter must be mapped to a typescript interface, there is no constraint on the type. for now on this class will be customFilter
    • complexFilter((node:NodeType, filter:CustomFilter) => boolean). A function that returns true if the node matches the filter
    • filterTemplate : a svelte component displaying the custom filter. It must throw a filterChanged event whenever the filter change. the event payload must be an object of type CustomFilter

Accordion events:

The Accordion could raise a selectionChanged event whenever a node is selected / deselected (when node selection is enabled with selectable attribute). The event payload contains a list of NodeType : NodeType[]


const onSelectionChanged = (e:CustomEvent<Disney[]>) => {				
		selectedNodes = e.detail;
	}

<Accordion  emptyTreeMessage="no data" on:selectionChanged={onSelectionChanged} selectable {root} nodeTemplate={Node2} {filter} ></Accordion>

styling an Accordion

Styling accordion node may be done using :

  • the nodeClass attribute that set a CSS class for accordion nodes.
  • the style slot that embed the CSS class.
<Accordion emptyTreeMessage="Mikey Mouse" ref="style2" {root} nodeTemplate={Node2} {filter} disposition="left" nodeClass="reddy">
  <style slot="style">
    .reddy {
      border-bottom: thin solid red;
      border-left:thin dotted red;		
      border-right:thin dashed red;
      border-top:solid 5px red;
      padding:10px;
      border-radius:8px;
    }
    .reddy:hover{
      background-color:lightgreen;
    }
  </style>
</Accordion>