This project was forked from sl-vue-tree. Some modifications were made: Added possibility to add restrictions for drag and drops.

sl-vue-tree

Customizable draggable tree component for Vue.js

demo

install

npm i sl-vue-tree

Quick start

<div id="app">
  <sl-vue-tree v-model="nodes"/>
</div>

<link rel="stylesheet" href="dist/sl-vue-tree-dark.css">
<script src="dist/sl-vue-tree.js"></script>

<script>

  var nodes = [
    {title: 'Item1', isLeaf: true},
    {title: 'Item2', isLeaf: true, data: { visible: false }},
    {title: 'Folder1'},
    {
      title: 'Folder2', isExpanded: true, children: [
        {title: 'Item3', isLeaf: true},
        {title: 'Item4', isLeaf: true}
      ]
    }
  ];

  new Vue({
    el: '#app',
    components: { SlVueTree },
    data: function () {
     return {
       nodes: nodes
     }
    }
  });
  
</script>    

The value property is an array of ISlTreeNodeModel nodes:

interface ISlTreeNodeModel<TDataType> {
    title: string;
    isLeaf?: boolean;
    children?: ISlTreeNodeModel<TDataType>[];
    isExpanded?: boolean;
    isSelected?: boolean;
    isDraggable?: boolean;
    isSelectable?: boolean;
    data?: TDataType; // any serializable user data
}

For convenience the component's events return ISlTreeNode objects. Those actually are ISlTreeNodeModel with some computed props:

interface ISlTreeNode<TDataType> extends ISlTreeNodeModel<TDataType> {
    isFirstChild: boolean;
    isLastChild: boolean;
    isVisible: boolean;	// node is visible if all of its parents are expanded
    level: number; // nesting level
    ind: number; // index in the array of siblings 
    path: number[]; // path to node as array of indexes, for example [2, 0, 1] in the example above is path to `Item4` 
    pathStr: string; // serialized path to node
    children: ISlTreeNode<TDataType>[];
}

You can get the list of ISlTreeNode from the computed slVueTree.nodes property

Props

| prop | type | default | description | |------------------|--------------------|------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | value | ISlTreeNodeModel[] | [] | An array of nodes to show. Each node is represented by ISlTreeNodeModel interface | | allowMultiselect | Boolean | true | Disable or enable the multiselect feature | | allowToggleBranch | Boolean | true | Disable or enable the expand/collapse button | | edgeSize | Number | 3 | Offset in pixels from top and bottom for folder-node element. While dragging cursor is in that offset, the dragging node will be placed before or after the folder-node instead of being placed inside the folder. | | scrollAreaHeight | Number | 70 | Offset in pixels from top and bottom for the component element. While dragging cursor is in that area, the scrolling starts. | | maxScrollSpeed | Number | 20 | The scroll speed is relative to the cursor position. Defines the max scroll speed.
| multiselectKey | String/String[] |['ctrlKey', 'metaKey'] | The keys for multiselect mode. Allowed values are ['ctrlKey', 'metaKey', 'altKey']

Computed props

| prop | type | description | |----------------|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | nodes | ISlTreeNode[] | List of nodes with some computed props. See ISlTreeNode interface. | | cursorPosition | ICursorPosition | Represents the current cursor position that describes the action that will be applied to the dragged node on mouseup event. See ICursorPosition interface | | selectionSize | Number | The count of selected nodes | dragSize | Number | The count of selected and draggable nodes | isDragging | Boolean | True if nodes are dragging

interface ICursorPosition<TDataType> {
  node: ISlTreeNode<TDataType>;
  placement: 'before' | 'inside' | 'after';
}  

Events

| event | callback arguments | description | |-----------------|----------------------------------------------------------------------------|---------------------------------------------------| | input | nodes: ISlTreeNodeModel[] | triggers for any changes to value property | | select | selectedNodes: ISlTreeNode[], event: MouseEvent | triggers when a node has been selected/deselected | | toggle | toggledNode: ISlTreeNode, event: MouseEvent | triggers when a node has been collapsed/expanded | | drop | draggingNodes: ISlTreeNode[], position: ICursorPosition, event: MouseEvent | triggers when dragging nodes have been dropped | | nodeclick | node: ISlTreeNode, event: MouseEvent | handle click event on node | | nodedblclick | node: ISlTreeNode, event: MouseEvent | handle dblclick event on node | | nodecontextmenu | node: ISlTreeNode, event: MouseEvent | handle contextmenu event on node | | externaldrop | cursorPosition: ICursorPosition, event: MouseEvent | handle drop event for external items demo |

Methods

| method | description | |----------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------| | getNode(path: number[]): ISlTreeNode | Find the node by using its path | | traverse(cb: (node: ISlTreeNode, nodeModel: ISlTreeNodeModel, siblings: ISlTreeNodeModel[]) => boolean) | Helpful method to traverse all nodes. The traversing will be stopped if callback returns false. | | updateNode(path: number[], patch: Partial) | Update the node by using its path | | select(path: number[], addToSelection = false) | Select the node by using its path | | | getNodeEl(): HTMLElement | Get the node HTMLElement by using its path | | getSelected(): ISlTreeNode[] | Get selected nodes | | insert(position: ICursorPosition, nodeModel: ISlTreeNodeModel) | Insert nodes by the current cursor position. | | remove(paths: number[][]) | Remove nodes by paths. For example .remove([[0,1], [0,2]]) | getFirstNode(): ISlTreeNode | Get the first node in the tree | | getLastNode(): ISlTreeNode | Get the last node in the tree | getNextNode(path: number[], filter?: (node: ISlTreeNode) => boolean): ISlTreeNode; | Get the next node. You can skip the next nodes by using filter | getPrevNode(path: number[], filter?: (node: ISlTreeNode) => boolean): ISlTreeNode; | Get the previous node. You can skip the previous nodes by using filter

Slots

| slot | context | description | |------------|-------------|-----------------------------------------------------------------------------------------------| | title | ISlTreeNode | Slot for item title | | toggle | ISlTreeNode | Slot for expand/collapse button | | sidebar | ISlTreeNode | Sidebar content | | draginfo | SlVueTree | Slot that follows the mouse cursor while dragging. By default shows the dragging nodes count. | | empty-node | ISlTreeNode | Slot for (optional) message when folder is open, but empty |

IE 11 support

You must add a babel-polyfill for it to work correctly in IE11
See IE11 example

Examples

Add a folder or item icon via title slot

<sl-vue-tree v-model="nodes">
    <template slot="title" slot-scope="{ node }">

      <span class="item-icon">
        <i class="fa fa-file" v-if="node.isLeaf"></i>
        <i class="fa fa-folder" v-if="!node.isLeaf"></i>
      </span>
    
      {{ node.title }}
      
    </template>
</sl-vue-tree>

Select all nodes

slVueTree.traverse((node, nodeModel, path) => {
    Vue.set(nodeModel, 'isSelected', true);
})

Handle keydown and keyup events via getNextNode and getPrevNode methods

demo

Contributing

see CONTRIBUTING.md

Changelog

v1.8.5

• fix d.ts https://github.com/holiber/sl-vue-tree/pull/77

v1.8.4

• added insert method https://github.com/holiber/sl-vue-tree/pull/39

v1.8.3

• Allow to disable or enable the expand/collapse button https://github.com/holiber/sl-vue-tree/pull/33

v1.8.1

• added IE11 support https://github.com/holiber/sl-vue-tree/issues/17

v1.8.0

• added empty-node slot

v1.7.1

• added multiselectKey property

v1.7.0

• added isSelectable and isDraggable flags

v1.6.0

• added getNextNode and getPrevNode methods https://github.com/holiber/sl-vue-tree/issues/6

v1.5.1

• improve drop on the bottom of tree https://github.com/holiber/sl-vue-tree/issues/5

v1.5.0

• SlVueTree.select method added
• SlVueTree.@nodeclick event fixed