Maintain ZoomToFit in Angular Gantt component

18 May 2022 / 2 minutes to read

In the Gantt control, While performing edit actions or dynamically change dataSource, the timeline gets refreshed. When zoomToFit toolbar item is clicked and perform editing actions or dynamically change dataSource, the timeline gets refreshed. So that, the timeline will not fit to the project any more.

Maintain zoomToFit after edit actions

We can maintain zoomToFit after editing actions(cell edit,dialog edit,taskbar edit) by using fitToProject method in actionComplete and taskbarEdited event.

Source

Preview

app.component.ts

app.module.ts

data.ts

main.ts

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

@Component({
    selector: 'app-root',
    template:
       `<ejs-gantt #gantt id="ganttDefault" height="430px" [dataSource]="data" [taskFields]="taskSettings"[toolbar]="toolbar" [editSettings]="editSettings" (actionComplete)="actionComplete($event)" (taskbarEdited)="taskbarEdited($event)"></ejs-gantt>`,
    encapsulation: ViewEncapsulation.None
})
export class AppComponent{
    // Data for Gantt
    public data: object[];
    public taskSettings: object;
    public toolbar: ToolbarItem[];
    public editSettings: EditSettingsModel;
    @ViewChild('gantt', {static: true})
    public ganttObj: GanttComponent;
    public ngOnInit(): void {
        this.data = projectNewData;
        this.taskSettings = {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
            endDate: 'EndDate',
            duration: 'Duration',
            progress: 'Progress',
            dependency: 'Predecessor',
            child: 'subtasks'
        };
        this.editSettings = {
            allowEditing: true,
            allowTaskbarEditing: true,
        };
        this.toolbar =  ['Edit','ZoomToFit'];
    }
    public actionComplete(args: any) {
      if ((args.action === "CellEditing" || args.action === "DialogEditing") && args.requestType === "save") {
        this.ganttObj.dataSource = projectNewData;
        this.ganttObj.fitToProject();
      }
    };
    public taskbarEdited(args: any) {
      if (args) {
        this.ganttObj.dataSource = projectNewData;
        this.ganttObj.fitToProject();
      }
    };
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { GanttModule } from '@syncfusion/ej2-angular-gantt';
import { EditService, SelectionService, ToolbarService } from '@syncfusion/ej2-angular-gantt';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, GanttModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [EditService, SelectionService, ToolbarService]
})
export class AppModule { }

/**
 * Gantt DataSource
 */

export let projectNewData: Object[] = [
        {
            TaskID: 1,
            TaskName: 'Project Initiation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			isParent:true,
            subtasks: [
                { TaskID: 2, TaskName: 'Identify Site location', StartDate: new Date('04/02/2019'), Duration: 0, Progress: 50 },
                { TaskID: 3, TaskName: 'Perform Soil test', StartDate: new Date('04/02/2019'), Duration: 4, Progress: 50  },
                { TaskID: 4, TaskName: 'Soil test approval', StartDate: new Date('04/02/2019'), Duration: 4,Predecessor:"2FS", Progress: 50  },
            ]
        },
        {
            TaskID: 5,
            TaskName: 'Project Estimation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			isParent:true,
            subtasks: [
                { TaskID: 6, TaskName: 'Develop floor plan for estimation', StartDate: new Date('04/04/2019'), Duration: 3, Progress: 50 },
                { TaskID: 7, TaskName: 'List materials', StartDate: new Date('04/04/2019'), Duration: 3, Progress: 50 },
                { TaskID: 8, TaskName: 'Estimation approval', StartDate: new Date('04/04/2019'), Duration: 0,Predecessor:"6SS", Progress: 50  }
            ]
        },
    ];

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

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

Maintain zoomToFit after change dataSource dynamically

We can maintain zoomToFit after change dataSource dynamically, by calling fitToProject method in dataBound event.