Dragging moving of panels in Angular Dashboard layout component
27 Apr 202424 minutes to read
The Dashboard Layout component is provided with dragging functionality to drag and reorder the panels within the layout. While dragging a panel, a holder will be highlighted below the panel indicating the panel placement on panel drop. This helps the user to decide whether to place the panel in the current position or revert to previous position without disturbing the layout.
If one or more panels collide while dragging, then the colliding panels will be pushed towards the left or right or top or bottom direction where an adaptive space for the collided panel is available. The position changes of these collided panels will be updated dynamically during dragging of a panel, so the user can conclude whether to place the panel in the current position or not.
While dragging a panel in Dashboard layout the following dragging events will be triggered,
- dragStart - Triggers when panel drag starts
- drag - Triggers when panel is being dragged
- dragStop - Triggers when panel drag stops
The following sample demonstrates dragging and pushing of panels. For example, while dragging the panel 0 over panel 1, these panels get collided and push the panel 1 towards the feasible direction, so that, the panel 0 gets placed in the panel 1 position.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { DashboardLayoutModule } from '@syncfusion/ej2-angular-layouts'
import { Component, ViewEncapsulation } from '@angular/core';
@Component({
imports: [ DashboardLayoutModule],
standalone: true,
selector: 'app-root',
styleUrls: ['./default-style.css'],
template: `
<div class="control-section">
<ejs-dashboardlayout id='defaultLayout' #defaultLayout [columns]='columns' [cellSpacing]='cellSpacing' [panels]='panels'
(dragStart)="onDragStart($this)" (drag)="onDrag($this)" (dragStop)="onDragStop($this)">
</ejs-dashboardlayout>
</div>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public cellSpacing: number[] = [10, 10];
public columns: number = 5;
public panels: any = [{'sizeX': 1, 'sizeY': 1, 'row': 0, 'col': 0, content:'<div class="content">0</div>'},
{'sizeX': 3, 'sizeY': 2, 'row': 0, 'col': 1, content:'<div class="content">1</div>'},
{'sizeX': 1, 'sizeY': 3, 'row': 0, 'col': 4, content:'<div class="content">2</div>'},
{'sizeX': 1, 'sizeY': 1, 'row': 1, 'col': 0, content:'<div class="content">3</div>'},
{'sizeX': 2, 'sizeY': 1, 'row': 2, 'col': 0, content:'<div class="content">4</div>'},
{'sizeX': 1, 'sizeY': 1, 'row': 2, 'col': 2, content:'<div class="content">5</div>'},
{'sizeX': 1, 'sizeY': 1, 'row': 2, 'col': 3, content:'<div class="content">6</div>'},
];
$this: any = this;
//Dashboard Layout's drag start event function
onDragStart(args: any) {
console.log("Drag start");
}
//Dashboard Layout's drag event function
onDrag(args: any) {
console.log("Dragging");
}
//Dashboard Layout's dragstop event function
onDragStop(args: any) {
console.log("Drag stop");
}
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));Customizing the dragging handler
Initially, the complete panel will act as the handler for dragging the panel such that the dragging action occurs on clicking anywhere over a panel. However, this dragging handler for the panels can be customized using the draggableHandle property to restrict the dragging action within a particular element in the panel.
The following sample demonstrates customizing the dragging handler of the panels where the dragging action of panel occurs only with the header of the panel.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { DashboardLayoutModule } from '@syncfusion/ej2-angular-layouts'
import { ChartAllModule, AccumulationChartAllModule } from '@syncfusion/ej2-angular-charts'
import { Component,ViewEncapsulation } from '@angular/core';
@Component({
imports: [ DashboardLayoutModule, ChartAllModule, AccumulationChartAllModule],
standalone: true,
selector: 'app-root',
styleUrls: ['./default-style.css'],
template: `
<div class="control-section">
<ejs-dashboardlayout [columns]="6" #editLayout [cellSpacing]='cellSpacing' [draggableHandle]='draggableHandle'>
<e-panels>
<e-panel [sizeX]="3" [sizeY]="2" [row]="0" [col]="0">
<ng-template #header>
<div class="header">Product usage ratio</div>
<span class="handler e-icons burg-icon"></span>
</ng-template>
<ng-template #content>
<div id="column">
<ejs-chart id="columnChart" height="162px" [primaryXAxis]='primaryXAxis'>
<e-series-collection>
<e-series [dataSource]="chartData" xName='month' yName='sales' type="Column">
</e-series>
</e-series-collection>
</ejs-chart>
</div>
</ng-template>
</e-panel>
<e-panel [sizeX]="3" [sizeY]="2" [row]="0" [col]="3">
<ng-template #header>
<div class="header">Last year Sales Comparison</div>
<span class="handler e-icons burg-icon"></span>
</ng-template>
<ng-template #content>
<div id="line">
<ejs-chart id="lineChart" height="162px" [primaryXAxis]='primaryXAxis'>
<e-series-collection>
<e-series [dataSource]="lineData" xName='x' yName='y' type="Line">
</e-series>
</e-series-collection>
</ejs-chart>
</div>
</ng-template>
</e-panel>
<e-panel [sizeX]="3" [sizeY]="2" [row]="0" [col]="3">
<ng-template #header>
<div class="header">Sales increase percentage 1</div>
<span class="handler e-icons burg-icon"></span>
</ng-template>
<ng-template #content>
<div id="pie">
<ejs-accumulationchart id="pieChart" height="162px" [legendSettings]="legendSettings" [tooltip]='tooltip'>
<e-accumulation-series-collection>
<e-accumulation-series [dataSource]="piechart" xName="x" yName="y" innerRadius="20%"
name="Browser">
</e-accumulation-series>
</e-accumulation-series-collection>
</ejs-accumulationchart>
</div>
</ng-template>
</e-panel>
<e-panel [sizeX]="3" [sizeY]="2" [row]="1" [col]="0">
<ng-template #header>
<div class="header">Sales increase percentage 2</div>
<span class="handler e-icons burg-icon"></span>
</ng-template>
<ng-template #content>
<div id="pie1">
<ejs-accumulationchart id="pieChart1" [enableAnimation]="false" height="162px"
[tooltip]='tooltip' [legendSettings]='legendSettings'>
<e-accumulation-series-collection>
<e-accumulation-series [dataSource]="piechart1" xName="x" yName="y" radius="70%"
name="Browser">
</e-accumulation-series>
</e-accumulation-series-collection>
</ejs-accumulationchart>
</div>
</ng-template>
</e-panel>
</e-panels>
</ejs-dashboardlayout>
</div>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public cellSpacing: number[] = [10, 10];
public draggableHandle: string = '.e-panel-header';
public primaryXAxis: Object = { valueType: 'Category' };
public chartData: any[] = [
{ month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
{ month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
{ month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
{ month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
{ month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
{ month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
];
public lineData: any[] = [
{ x: 2013, y: 28 }, { x: 2014, y: 25 }, { x: 2015, y: 26 }, { x: 2016, y: 27 },
{ x: 2017, y: 32 }, { x: 2018, y: 35 },
];
public piechart: any[] = [
{ x: 'TypeScript', y: 13, text: 'TS 13%' },
{ x: 'React', y: 12.5, text: 'Reat 12.5%' },
{ x: 'MVC', y: 12, text: 'MVC 12%' },
{ x: 'Core', y: 12.5, text: 'Core 12.5%' },
{ x: 'Vue', y: 10, text: 'Vue 10%' },
{ x: 'Angular', y: 40, text: 'Angular 40%' }
];
public piechart1: any[] = [
{ 'x': 'Chrome', y: 37, text: '37%' },
{ 'x': 'UC Browser', y: 17, text: '17%' },
{ 'x': 'iPhone', y: 19, text: '19%' },
{ 'x': 'Others', y: 4, text: '4%' },
{ 'x': 'Opera', y: 11, text: '11%' },
{ 'x': 'Android', y: 12, text: '12%' }
];
public legendSettings: Object = {
visible: false
};
tooltip: any;
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));Disable dragging of panels
By default, the dragging of panels is enabled in Dashboard Layout. It can also be disabled with the help of allowDragging API. Setting allowDragging to false disables the dragging functionality in Dashboard Layout.
The following sample demonstrates Dashboard Layout with dragging support disabled.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { DashboardLayoutModule } from '@syncfusion/ej2-angular-layouts'
import { Component, ViewEncapsulation } from '@angular/core';
@Component({
imports: [ DashboardLayoutModule],
standalone: true,
selector: 'app-root',
styleUrls: ['./default-style.css'],
template: `
<div class="control-section">
<ejs-dashboardlayout id='defaultLayout' #defaultLayout [columns]='columns' [cellSpacing]='cellSpacing' [panels]='panels'
[allowDragging]='allowDragging'>
</ejs-dashboardlayout>
</div>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public cellSpacing: number[] = [10, 10];
public columns: number = 5;
public allowDragging: boolean = false;
public panels: any = [
{'sizeX': 1, 'sizeY': 1, 'row': 0, 'col': 0, content:'<div class="content">0</div>'},
{'sizeX': 3, 'sizeY': 2, 'row': 0, 'col': 1, content:'<div class="content">1</div>'},
{'sizeX': 1, 'sizeY': 3, 'row': 0, 'col': 4, content:'<div class="content">2</div>'},
{'sizeX': 1, 'sizeY': 1, 'row': 1, 'col': 0, content:'<div class="content">3</div>'},
{'sizeX': 2, 'sizeY': 1, 'row': 2, 'col': 0, content:'<div class="content">4</div>'},
{'sizeX': 1, 'sizeY': 1, 'row': 2, 'col': 2, content:'<div class="content">5</div>'},
{'sizeX': 1, 'sizeY': 1, 'row': 2, 'col': 3, content:'<div class="content">6</div>'},
];
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));You can refer to our Angular Dashboard Layout feature tour page for its groundbreaking feature representations. You can also explore our Angular Dashboard Layout example to knows how to present and manipulate data.