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Color Mapping in Angular TreeMap component

01 Dec 2021 / 5 minutes to read

Color mapping is used to customize the color for each group or item based on the specified types. The following options are available to customize the group and leaf items in the TreeMap.

Range color mapping

Range color mapping is used to apply color to the items by giving specific ranges in the DataSource, and it should be specifying the data source properties to the rangeColorValuePath. The color mapping ranges to be specified in the from and to properties of the colorMapping.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;'  [dataSource]='data' weightValuePath='count' rangeColorValuePath='count'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [{ fruit:'Apple', count:5000 },
                       { fruit:'Mango', count:3000 },
                       { fruit:'Orange', count:2300 },
                       { fruit:'Banana', count:500 },
                       { fruit:'Grape', count:4300 },
                       { fruit:'Papaya', count:1200 },
                       { fruit:'Melon', count:4500 }
    ];
    public leafItemSettings: object = {
         labelPath: 'fruit',
        colorMapping:[
            {
               from:500,
               to:3000,
               color:'orange'
           },
           {
               from:3000,
               to:5000,
               color:'green'
           }
        ]
    };
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

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

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

Equal color mapping

Equal color mapping is used to fill colors to each item by specifying equal value present in the data source, that can be specified in the equalColorValuePath property.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;'  [dataSource]='data' weightValuePath='count' equalColorValuePath='Brand'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
        { Car:'Mustang', Brand:'Ford', count:232 },
                       { Car:'EcoSport', Brand:'Ford', count:121 },
                       { Car:'Swift', Brand:'Maruti', count:143 },
                       { Car:'Baleno', Brand:'Maruti', count:454 },
                       { Car:'Vitara Brezza', Brand:'Maruti', count:545 },
                       { Car:'A3 Cabriolet', Brand:'Audi',count:123 },
                       { car:'RS7 Sportback', Brand:'Audi', count:523 }
    ];
    public leafItemSettings: object = {
        labelPath: 'Car',
        colorMapping:[
            {
               value:'Ford',
               color:'green'
           },
           {
               value:'Audi',
               color:'red'
           },
           {
               value:'Maruti',
               color:'orange'
           }
        ]
    };
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

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

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

Desaturation color mapping

Desaturation color mapping is used to apply colors to the items based on the minOpacity and maxOpacity properties in the colorMapping.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;'  [dataSource]='data' weightValuePath='count' rangeColorValuePath='count'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
                      { fruit:'Apple', count:5000 },
                       { fruit:'Mango', count:3000 },
                       { fruit:'Orange', count:2300 },
                       { fruit:'Banana', count:500 },
                       { fruit:'Grape', count:4300 },
                       { fruit:'Papaya', count:1200 },
                       { fruit:'Melon', count:4500 }
    ];
    public leafItemSettings: object = {
        labelPath: 'fruit',
        colorMapping:[
            {
               from:500,
               to:3000,
               minOpacity:0.2,
               maxOpacity:0.5,
               color:'orange'
           },
           {
               from:3000,
               to:5000,
               minOpacity:0.5,
               maxOpacity:0.8,
               color:'green'
           }
        ]
        };
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

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

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

Palette color mapping

The palette color mapping is used to fill the color to each group or leaf item by given colors in the palette property.

Source
Preview
app.component.ts
app.module.ts
main.ts
Copied to clipboard
import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;'  [dataSource]='data' weightValuePath='count' [palette]='palette'
    [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
        { Car:'Mustang', Brand:'Ford', count:232 },
                       { Car:'EcoSport', Brand:'Ford', count:121 },
                       { Car:'Swift', Brand:'Maruti', count:143 },
                       { Car:'Baleno', Brand:'Maruti', count:454 },
                       { Car:'Vitara Brezza', Brand:'Maruti', count:545 },
                       { Car:'A3 Cabriolet', Brand:'Audi',count:123 },
                       { car:'RS7 Sportback', Brand:'Audi', count:523 }
    ];
    public leafItemSettings: object = {
        labelPath: 'Car'
    };
    public palette: object= ['red','green'],
    }
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

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

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

Desaturation with multiple colors

Multiple colors are used as gradient effect to specific shapes based on the ranges in datasource. By using color property, you can set n number of colors.

Source
Preview
app.component.ts
app.module.ts
main.ts
Copied to clipboard
import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;'  [dataSource]='data' weightValuePath='count' rangeColorValuePath='count' [leafItemSettings]='leafItemSettings' [legendSettings] ='legendSettings'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
        { fruit:'Apple', count:5000 },
        { fruit:'Mango', count:3000 },
        { fruit:'Orange', count:2300 },
        { fruit:'Banana', count:500 },
        { fruit:'Grape', count:4300 },
        { fruit:'Papaya', count:1200 },
        { fruit:'Melon', count:4500 }
    ];
    public legendSettings:object ={
        visible:true
    }
    public leafItemSettings: object = {
        labelPath: 'fruit',
        colorMapping:[
            {
               from:500,
               to:2500,
               color:['orange','pink']
           },
           {
               from:3000,
               to:5000,
               color:['green','red','blue']
           }
        ]
    };
    }
Copied to clipboard
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

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

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

Color for items excluded from color mapping

Get the excluded ranges from data source using the color mapping and apply the specific color to those items, without specifying the from and to properties.

Source
Preview
app.component.ts
app.module.ts
main.ts
Copied to clipboard
import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;'  [dataSource]='data' weightValuePath='count' rangeColorValuePath='count' [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
        { fruit:'Apple', count:5000 },
        { fruit:'Mango', count:3000 },
        { fruit:'Orange', count:2300 },
        { fruit:'Banana', count:500 },
        { fruit:'Grape', count:4300 },
        { fruit:'Papaya', count:1200 },
        { fruit:'Melon', count:4500 }
    ];
    public leafItemSettings: object = {
        labelPath: 'fruit',
         colorMapping:[
            {
               from:500,
               to:2500,
               color:'orange'
           },
           {
               from:3000,
               to:4000,
               color:'green'
           },
           {
               color:'red'
           }
        ]
    };
    }
Copied to clipboard
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

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

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

Bind the colors to the items from data source

To set the color for each item from the data source, bind the data source property to the colorValuePath.

Source
Preview
app.component.ts
app.module.ts
main.ts
Copied to clipboard
import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<ejs-treemap id='container' style='display: block;'  [dataSource]='data' weightValuePath='count' colorValuePath='color' [leafItemSettings]='leafItemSettings'>
    </ejs-treemap>`
})
export class AppComponent {
    public data: object[] = [
        { fruit:'Apple', count:5000, color: 'red'},
        { fruit:'Mango', count:3000, color:'blue'},
        { fruit:'Orange', count:2300, color:'green' },
        { fruit:'Banana', count:500, color:'yellow' },
        { fruit:'Grape', count:4300, color:'orange' },
        { fruit:'Papaya', count:1200, color:'pink' },
        { fruit:'Melon', count:4500, color:'violet' }

    ];
    public leafItemSettings: object = {
        labelPath: 'fruit'
    };
    }
Copied to clipboard
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { TreeMapModule, TreeMapLegendService, TreeMapTooltipService, TreeMapAllModule } from '@syncfusion/ej2-angular-treemap';

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

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