Responsive columns in Angular Gantt component

17 Jun 202311 minutes to read

You can toggle the column visibility based on media queries, which are defined in the hideAtMedia. The hideAtMedia accepts valid Media Queries.

import { Component, ViewEncapsulation, OnInit } from '@angular/core';
import { Gantt } from '@syncfusion/ej2-gantt';
import { projectNewData } from './data';

@Component({
    selector: 'app-root',
    template:
       `<ejs-gantt id="ganttDefault" height="430px" [dataSource]="data"  [taskFields]="taskSettings" [columns]="columns" [splitterSettings] = "splitterSettings" [allowResizing] = 'true'></ejs-gantt>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent{
    // Data for Gantt
    public data?: object[];
    public taskSettings?: object;
    public columns?: object[];
    public splitterSettings?: object;
    public ngOnInit(): void {
        this.data = projectNewData;
        this.taskSettings = {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
            duration: 'Duration',
            progress: 'Progress',
            child: 'subtasks'
        };
        this.splitterSettings = {
            columnIndex:3
            };
        this.columns =  [
            { field: 'TaskID', headerText: 'Task ID', textAlign: 'Left', width: '100' },
            { field: 'TaskName', headerText: 'Task Name', width: '200',hideAtMedia: '(min-width: 700px)'},
            { field: 'StartDate', headerText: 'Start Date', width: '150' },
            { field: 'Duration', headerText: 'Duration', width: '100', hideAtMedia: '(max-width: 500px)'},
            { field: 'Progress', headerText: 'Progress', width: '150' }
        ];
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { GanttModule } from '@syncfusion/ej2-angular-gantt';
import { ResizeService } from '@syncfusion/ej2-angular-gantt';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, GanttModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ResizeService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Change tree/expander column

The tree/expander column is a column in the Gantt component, that has icons to expand or collapse the parent records. You can define the tree column index in the Gantt component by using the treeColumnIndex property and the default value of this property is 0. The following code example shows how to use this property.

import { Component, ViewEncapsulation, OnInit } from '@angular/core';
import { Gantt } from '@syncfusion/ej2-gantt';
import { projectNewData } from './data';

@Component({
    selector: 'app-root',
    template:
       `<ejs-gantt id="ganttDefault" height="430px" [dataSource]="data"  [taskFields]="taskSettings" [treeColumnIndex]='2' [splitterSettings] = "splitterSettings" [allowResizing] = 'true'></ejs-gantt>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent{
    // Data for Gantt
    public data?: object[];
    public taskSettings?: object;
    public splitterSettings?: object;
    public columns?: object[];
    public ngOnInit(): void {
        this.data = projectNewData;
        this.taskSettings = {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
            duration: 'Duration',
            progress: 'Progress',
            child: 'subtasks'
        };
        this.splitterSettings = {
            columnIndex:3
            };
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { GanttModule } from '@syncfusion/ej2-angular-gantt';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, GanttModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Show or Hide columns dynamically

You can show or hide gantt columns dynamically using external buttons by invoking the showColumn or hideColumn method.

import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { Gantt } from '@syncfusion/ej2-gantt';
import { projectNewData } from './data';
import { GanttComponent } from '@syncfusion/ej2-angular-gantt';

@Component({
    selector: 'app-root',
    template:
       `<button ejs-button id='show' (click)='show()'>Show</button>
       <button ejs-button id='hide' (click)='hide()'>Hide</button>
       <br><br><br>
       <ejs-gantt id="ganttDefault" #gantt height="430px" [dataSource]="data" [taskFields]="taskSettings" [columns]="columns" [splitterSettings] = "splitterSettings"></ejs-gantt>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent{
    // Data for Gantt
    @ViewChild('gantt')
    public gantt?: GanttComponent;
    public data?: object[];
    public taskSettings?: object;
    public splitterSettings?: object;
    public columns?: object[];
    public ngOnInit(): void {
        this.data = projectNewData;
        this.taskSettings = {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
            duration: 'Duration',
            progress: 'Progress',
            child: 'subtasks'
        };
        this.columns =  [
            { field: 'TaskID', headerText: 'Task ID', textAlign: 'Left', width: '100' },
            { field: 'TaskName', headerText: 'Task Name', width: '150' },
            { field: 'StartDate', headerText: 'Start Date', width: '150' },
            { field: 'Duration', headerText: 'Duration', width: '150' },
            { field: 'Progress', headerText: 'Progress', width: '150' },
        ];
        this.splitterSettings = {
             position: '75%'
        };
    }
     show(): void {
        this.gantt!.showColumn(['Duration']); // show by HeaderText
    }

    hide(): void {
        this.gantt!.hideColumn(['Duration']); // hide by HeaderText
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { GanttModule } from '@syncfusion/ej2-angular-gantt';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, GanttModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);