Cell in Angular Treegrid component

9 Jan 202311 minutes to read

Customize cell styles

The appearance of cells can be customized by using the queryCellInfo event.
The queryCellInfo event triggers for every cell. In that event handler, you can get QueryCellInfoEventArgs that contains the details of the cell.

import { Component, OnInit } from '@angular/core';
import { sampleData } from './datasource';
import {  QueryCellInfoEventArgs } from '@syncfusion/ej2-treegrid';

@Component({
    selector: 'app-container',
    template: `<ejs-treegrid [dataSource]='data' height='300' [treeColumnIndex]='1' (queryCellInfo)='customizeCell($event)' childMapping='subtasks' >
        <e-columns>
                    <e-column field='taskID' headerText='Task ID' textAlign='Right' width=90></e-column>
                    <e-column field='taskName' headerText='Task Name' textAlign='Left' width=180></e-column>
                    <e-column field='startDate' headerText='Start Date' textAlign='Right' format='yMd' width=90></e-column>
                    <e-column field='duration' headerText='Duration' textAlign='Right' width=80></e-column>
                    <e-column field='progress' headerText='Progress' textAlign='Right' width=90></e-column>
        </e-columns>
                </ejs-treegrid>`
})
export class AppComponent implements OnInit {

    public data: Object[];

    ngOnInit(): void {
        this.data = sampleData;
    }
 customizeCell(args: QueryCellInfoEventArgs) {
    if (args.column.field === 'progress' && +args.cell.innerHTML > 90 && +args.cell.innerHTML <= 100){
        args.cell.setAttribute('style', 'background-color:#336c12;color:white;');
    } else if (+args.cell.innerHTML > 20 && args.column.field === 'progress') {
        args.cell.setAttribute('style', 'background-color:#7b2b1d;color:white;');
    }
}
}
import { NgModule,ViewChild } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid';
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid';
import { AppComponent } from './app.component';
import {ButtonModule} from '@syncfusion/ej2-angular-buttons';
import { DropDownListAllModule } from '@syncfusion/ej2-angular-dropdowns';

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

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

You can get the cell details by using the getCellFromIndex method in tree grid. In this method, you need to pass the row index and column index as parameters to get the cell details.

Custom attributes

You can customize the treegrid cells by adding a CSS class to the customAttribute property of the column.

.e-attr {
    background: #d7f0f4;
}
{
    field: 'taskID', headerText: 'Task ID', width: 90, customAttributes: {class: "e-attr"}, textAlign: 'Right'
}

In the below example, we have customized the cells of TaskID and StartDate columns.

import { Component, OnInit,ViewEncapsulation } from '@angular/core';
import { sampleData } from './datasource';

@Component({
    selector: 'app-container',
    template: `<ejs-treegrid [dataSource]='data' height='300' [treeColumnIndex]='1' childMapping='subtasks' >
        <e-columns>
                    <e-column field='taskID' headerText='Task ID' [customAttributes]="{class: 'e-attr'}" textAlign='Right' width=90></e-column>
                    <e-column field='taskName' headerText='Task Name' textAlign='Left' width=180></e-column>
                    <e-column field='startDate' headerText='Start Date' [customAttributes]="{class: 'e-attr'}" textAlign='Right' format='yMd' width=90></e-column>
                    <e-column field='duration' headerText='Duration' textAlign='Right' width=80></e-column>
        </e-columns>
                </ejs-treegrid>`,
                styleUrls: ['app/app.style.css'],
    encapsulation: ViewEncapsulation.None
})
export class AppComponent implements OnInit {

    public data: Object[];
    ngOnInit(): void {
        this.data = sampleData;
    }
}
import { NgModule,ViewChild } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid';
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid';
import { AppComponent } from './app.component';
import {ButtonModule} from '@syncfusion/ej2-angular-buttons';
import { DropDownListAllModule } from '@syncfusion/ej2-angular-dropdowns';

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

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

Grid lines

The gridLines have option to display cell border and it can be defined by the gridLines property.

The available modes of grid lines are:

Modes Actions
Both Displays both the horizontal and vertical grid lines.
None No grid lines are displayed.
Horizontal Displays the horizontal grid lines only.
Vertical Displays the vertical grid lines only.
Default Displays grid lines based on the theme. 
import { Component, OnInit } from '@angular/core';
import { sampleData } from './datasource';

@Component({
    selector: 'app-container',
    template: `<ejs-treegrid [dataSource]='data' height='300' gridLines='Both' [treeColumnIndex]='1' childMapping='subtasks' >
        <e-columns>
                    <e-column field='taskID' headerText='Task ID' textAlign='Right' width=90></e-column>
                    <e-column field='taskName' headerText='Task Name' textAlign='Left' width=180></e-column>
                    <e-column field='startDate' headerText='Start Date' textAlign='Right' format='yMd' width=90></e-column>
                    <e-column field='duration' headerText='Duration' textAlign='Right' width=80></e-column>
        </e-columns>
                </ejs-treegrid>`
})
export class AppComponent implements OnInit {

    public data: Object[];
    ngOnInit(): void {
        this.data = sampleData;
    }
}
import { NgModule,ViewChild } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid';
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid';
import { AppComponent } from './app.component';
import {ButtonModule} from '@syncfusion/ej2-angular-buttons';
import { DropDownListAllModule } from '@syncfusion/ej2-angular-dropdowns';

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

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

By default, the treegrid renders with Default mode.
You can refer to our Angular Tree Grid feature tour page for its groundbreaking feature representations. You can also explore our Angular Tree Grid example to knows how to present and manipulate data.