Restrict the drag and drop for particular tree nodes in Vue Treeview component
11 Jun 202419 minutes to read
You can able to restrict to drag and drop files under folder only. These can be achieved by using nodeDragStop and nodeDragging event of TreeView.
<template>
<div id="app">
<div class="control_wrapper">
<ejs-treeview id='treeview' :fields="fields" :allowDragAndDrop='true' :nodeDragStop='dragStop'
:nodeDragging='nodeDrag'></ejs-treeview>
</div>
<div id="display"></div>
</div>
</template>
<script setup>
import { TreeViewComponent as EjsTreeview } from "@syncfusion/ej2-vue-navigations";
var dataSource = [
{
nodeId: '01', nodeText: 'Music', icon: 'folder',
nodeChild: [
{ nodeId: '01-01', nodeText: 'Gouttes.mp3', icon: 'audio' }
]
},
{
nodeId: '02', nodeText: 'Videos', icon: 'folder',
nodeChild: [
{ nodeId: '02-01', nodeText: 'Naturals.mp4', icon: 'video' },
{ nodeId: '02-02', nodeText: 'Wild.mpeg', icon: 'video' },
]
},
{
nodeId: '03', nodeText: 'Documents', icon: 'folder',
nodeChild: [
{ nodeId: '03-01', nodeText: 'Environment Pollution.docx', icon: 'docx' },
{ nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx', icon: 'docx' },
{ nodeId: '03-03', nodeText: 'Global Warming.ppt', icon: 'ppt' },
{ nodeId: '03-04', nodeText: 'Social Network.pdf', icon: 'pdf' },
{ nodeId: '03-05', nodeText: 'Youth Empowerment.pdf', icon: 'pdf' },
]
},
{
nodeId: '04', nodeText: 'Pictures', icon: 'folder', expanded: true,
nodeChild: [
{
nodeId: '04-01', nodeText: 'Camera Roll', icon: 'folder', expanded: true,
nodeChild: [
{ nodeId: '04-01-01', nodeText: 'WIN_20160726_094117.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/9.png' },
{ nodeId: '04-01-02', nodeText: 'WIN_20160726_094118.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/3.png' },
]
},
{ nodeId: '04-02', nodeText: 'Wind.jpg', icon: 'images' },
{ nodeId: '04-03', nodeText: 'Stone.jpg', icon: 'images' },
]
},
{
nodeId: '05', nodeText: 'Downloads', icon: 'folder',
nodeChild: [
{ nodeId: '05-01', nodeText: 'UI-Guide.pdf', icon: 'pdf' },
{ nodeId: '05-02', nodeText: 'Tutorials.zip', icon: 'zip' },
{ nodeId: '05-03', nodeText: 'Game.exe', icon: 'exe' },
{ nodeId: '05-04', nodeText: 'TypeScript.7z', icon: 'zip' },
]
},
];
const fields = { dataSource: dataSource, id: 'nodeId', text: 'nodeText', child: 'nodeChild', iconCss: 'icon', imageUrl: 'image' };
const nodeDrag = (args) => {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.dropIndicator = 'e-no-drop';
}
};
const dragStop = (args) => {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.cancel = true;
}
};
</script>
<style>
@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-vue-navigations/styles/material.css";
.control_wrapper {
display: block;
max-width: 400px;
max-height: 320px;
margin: auto;
overflow: auto;
border: 1px solid #dddddd;
border-radius: 3px;
}
.e-treeview .e-list-img {
width: 25px;
height: 25px;
}
/* Loading sprite image for TreeView */
.e-treeview .e-list-icon {
background-repeat: no-repeat;
background-image: url(https://ej2.syncfusion.com/demos/src/treeview/images/icons/file_icons.png);
height: 20px;
}
/* Specify the icon positions based upon class name */
.e-treeview .e-list-icon.folder {
background-position: -10px -552px;
}
.e-treeview .e-list-icon.docx {
background-position: -10px -20px;
}
.e-treeview .e-list-icon.ppt {
background-position: -10px -48px;
}
.e-treeview .e-list-icon.pdf {
background-position: -10px -104px;
}
.e-treeview .e-list-icon.images {
background-position: -10px -132px;
}
.e-treeview .e-list-icon.zip {
background-position: -10px -188px;
}
.e-treeview .e-list-icon.audio {
background-position: -10px -244px;
}
.e-treeview .e-list-icon.video {
background-position: -10px -272px;
}
.e-treeview .e-list-icon.exe {
background-position: -10px -412px;
}
</style><template>
<div id="app">
<div class="control_wrapper">
<ejs-treeview id='treeview' :fields="fields" :allowDragAndDrop='true' :nodeDragStop='dragStop'
:nodeDragging='nodeDrag'></ejs-treeview>
</div>
<div id="display"></div>
</div>
</template>
<script>
import { TreeViewComponent } from "@syncfusion/ej2-vue-navigations";
export default {
name: "App",
components: {
"ejs-treeview": TreeViewComponent
},
data() {
var dataSource = [
{
nodeId: '01', nodeText: 'Music', icon: 'folder',
nodeChild: [
{ nodeId: '01-01', nodeText: 'Gouttes.mp3', icon: 'audio' }
]
},
{
nodeId: '02', nodeText: 'Videos', icon: 'folder',
nodeChild: [
{ nodeId: '02-01', nodeText: 'Naturals.mp4', icon: 'video' },
{ nodeId: '02-02', nodeText: 'Wild.mpeg', icon: 'video' },
]
},
{
nodeId: '03', nodeText: 'Documents', icon: 'folder',
nodeChild: [
{ nodeId: '03-01', nodeText: 'Environment Pollution.docx', icon: 'docx' },
{ nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx', icon: 'docx' },
{ nodeId: '03-03', nodeText: 'Global Warming.ppt', icon: 'ppt' },
{ nodeId: '03-04', nodeText: 'Social Network.pdf', icon: 'pdf' },
{ nodeId: '03-05', nodeText: 'Youth Empowerment.pdf', icon: 'pdf' },
]
},
{
nodeId: '04', nodeText: 'Pictures', icon: 'folder', expanded: true,
nodeChild: [
{
nodeId: '04-01', nodeText: 'Camera Roll', icon: 'folder', expanded: true,
nodeChild: [
{ nodeId: '04-01-01', nodeText: 'WIN_20160726_094117.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/9.png' },
{ nodeId: '04-01-02', nodeText: 'WIN_20160726_094118.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/3.png' },
]
},
{ nodeId: '04-02', nodeText: 'Wind.jpg', icon: 'images' },
{ nodeId: '04-03', nodeText: 'Stone.jpg', icon: 'images' },
]
},
{
nodeId: '05', nodeText: 'Downloads', icon: 'folder',
nodeChild: [
{ nodeId: '05-01', nodeText: 'UI-Guide.pdf', icon: 'pdf' },
{ nodeId: '05-02', nodeText: 'Tutorials.zip', icon: 'zip' },
{ nodeId: '05-03', nodeText: 'Game.exe', icon: 'exe' },
{ nodeId: '05-04', nodeText: 'TypeScript.7z', icon: 'zip' },
]
},
];
return {
fields: { dataSource: dataSource, id: 'nodeId', text: 'nodeText', child: 'nodeChild', iconCss: 'icon', imageUrl: 'image' },
}
},
methods: {
nodeDrag: function (args) {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.dropIndicator = 'e-no-drop';
}
},
dragStop: function (args) {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.cancel = true;
}
}
}
}
</script>
<style>
@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-vue-navigations/styles/material.css";
.control_wrapper {
display: block;
max-width: 400px;
max-height: 320px;
margin: auto;
overflow: auto;
border: 1px solid #dddddd;
border-radius: 3px;
}
.e-treeview .e-list-img {
width: 25px;
height: 25px;
}
/* Loading sprite image for TreeView */
.e-treeview .e-list-icon {
background-repeat: no-repeat;
background-image: url(https://ej2.syncfusion.com/demos/src/treeview/images/icons/file_icons.png);
height: 20px;
}
/* Specify the icon positions based upon class name */
.e-treeview .e-list-icon.folder {
background-position: -10px -552px;
}
.e-treeview .e-list-icon.docx {
background-position: -10px -20px;
}
.e-treeview .e-list-icon.ppt {
background-position: -10px -48px;
}
.e-treeview .e-list-icon.pdf {
background-position: -10px -104px;
}
.e-treeview .e-list-icon.images {
background-position: -10px -132px;
}
.e-treeview .e-list-icon.zip {
background-position: -10px -188px;
}
.e-treeview .e-list-icon.audio {
background-position: -10px -244px;
}
.e-treeview .e-list-icon.video {
background-position: -10px -272px;
}
.e-treeview .e-list-icon.exe {
background-position: -10px -412px;
}
</style>