Angular BarGauge Properties

See Also

• Configure a Widget: Angular | Vue | React | jQuery | AngularJS | Knockout

To make your gauge "live", enable animation for it by setting the enabled property of the animation object to true. In this instance, the gauge indicators will appear in motion. In addition, within the animation object, you can set an appropriate easing mode using the easing property and specify how long the animation should run using the duration property.

$(function() {
    $("#barGaugeContainer").dxBarGauge({
        // ...
        animation: {
            easing: "linear",
            duration: 500
        }
    });
});

<dx-bar-gauge ... >
    <dxo-animation
        easing="linear"
        [duration]="500">
    </dxo-animation>
</dx-bar-gauge>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    // ...
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxBarGaugeModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxBarGaugeModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

<template>
    <DxBarGauge ... >
        <DxAnimation
            easing="linear"
            :duration="500"
        />
    </DxBarGauge>
</template>

<script>
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import DxBarGauge, {
    DxAnimation
} from 'devextreme-vue/bar-gauge';

export default {
    components: {
        DxBarGauge,
        DxAnimation
    },
    // ...
}
</script>

import React from 'react';

import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import BarGauge, {
    Animation 
} from 'devextreme-react/bar-gauge';

class App extends React.Component {
    render() {
        return (
            <BarGauge ... >
                <Animation
                    easing="linear"
                    duration={500}
                />
            </BarGauge>
        );
    }
}
export default App;

@(Html.DevExtreme().BarGauge()
    @* ... *@
    .Animation(a => a
        .Easing(VizAnimationEasing.Linear)
        .Duration(500)
    )
)

BarGauge displays values in the form of several circular bars each placed on a separate track. Since a bar indicates a value, it occupies only a segment of this track. The remaining segment is drawn in the color specified by the backgroundColor property.

This property supports the following colors:

• Hexadecimal colors
• RGB colors
• RGBA colors
• Predefined/cross-browser color names
• Predefined SVG colors
• Paint server address

By default, all bars start from the beginning of the gauge's scale. If you need to draw them starting from a specific scale value, assign the required value to the baseValue property. In this instance, each bar will display the range from the baseValue to the corresponding value specified to this bar.

These features allow a user to export your UI component into a document or print it. When exporting is enabled, the "Exporting/Printing" button appears in the UI component. A click on it invokes a drop-down menu that lists exporting and printing commands. The following formats are supported for exporting into: PNG, PDF, JPEG, SVG and GIF.

See Also

• exportTo(fileName, format)
• print()
• DevExpress.viz.exportWidgets(widgetInstances, options)

Specify the startAngle and endAngle properties of the geometry configuration object to customize the shape of the bar gauge's arc. This arc is drawn from the startAngle to the endAngle as illustrated by the following image.

Each gauge bar is accompanied by a label that usually displays the value of the bar. Use the properties of the label object to customize the label's text, specify its format, font, and distance between the label and the bar.

To hide labels, use the label.visible property or assign false straight to the label property.

View Demo

See Also

• resolveLabelOverlapping

The legend is a component that helps a user identify bars. The legend contains several items, one per bar, each consisting of a colored marker and text showing the bar's argument.

You can make the legend visible by setting the legend.visible property to true.

When the UI component is bound to a remote data source, it can display a loading indicator while data is loading.

To change the loading indicator's visibility, use the show property or the showLoadingIndicator() and hideLoadingIndicator() methods.

See Also

• onExporting
• onFileSaving

See Also

• onExported
• onFileSaving

See Also

• onExporting
• onExported

The UI component notifies you of errors and warnings by passing messages to the browser console. Each message contains the incident's ID, a brief description, and a link to the Errors and Warnings section where further information about this incident can be found.

The onIncidentOccurred function allows you to handle errors and warnings the way you require. The object passed to it contains the target field. This field provides information about the occurred incident and contains the following properties:

• id
  The incident's ID. The full list of IDs can be found in the Errors and Warnings section.
• type
  The incident's type: "error" or "warning".
• args
  The argument of the incident's message. Depends on the incident. For example, it may be the name of the data source field that was specified incorrectly, or the name of the property that was not set properly.
• text
  The text passed to the browser's console. Includes the args content, if there is any.
• widget
  The name of the UI component that produced the error or warning.
• version
  The used DevExtreme version.

See Also

• Get a UI component Instance in Angular | AngularJS | Knockout | Vue | React

The following example shows how to subscribe to component property changes:

$(function() {
    $("#barGaugeContainer").dxBarGauge({
        // ...
        onOptionChanged: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    });
});

<dx-bar-gauge ...
    (onOptionChanged)="handlePropertyChange($event)"> 
</dx-bar-gauge>

import { Component } from '@angular/core'; 

@Component({ 
    selector: 'app-root', 
    templateUrl: './app.component.html', 
    styleUrls: ['./app.component.css'] 
}) 

export class AppComponent { 
    // ...
    handlePropertyChange(e) {
        if(e.name === "changedProperty") { 
            // handle the property change here
        }
    }
}

import { BrowserModule } from '@angular/platform-browser'; 
import { NgModule } from '@angular/core'; 
import { AppComponent } from './app.component'; 
import { DxBarGaugeModule } from 'devextreme-angular'; 

@NgModule({ 
    declarations: [ 
        AppComponent 
    ], 
    imports: [ 
        BrowserModule, 
        DxBarGaugeModule 
    ], 
    providers: [ ], 
    bootstrap: [AppComponent] 
}) 

export class AppModule { }  

<template> 
    <DxBarGauge ...
        @option-changed="handlePropertyChange"
    />            
</template> 

<script> 
import 'devextreme/dist/css/dx.common.css'; 
import 'devextreme/dist/css/dx.light.css'; 
import DxBarGauge from 'devextreme-vue/bar-gauge'; 

export default { 
    components: { 
        DxBarGauge
    }, 
    // ...
    methods: { 
        handlePropertyChange: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    } 
} 
</script> 

import React from 'react'; 
import 'devextreme/dist/css/dx.common.css'; 
import 'devextreme/dist/css/dx.light.css'; 

import BarGauge from 'devextreme-react/bar-gauge'; 

const handlePropertyChange = (e) => {
    if(e.name === "changedProperty") {
        // handle the property change here
    }
}

export default function App() { 
    return ( 
        <BarGauge ...
            onOptionChanged={handlePropertyChange}
        />        
    ); 
} 

This property accepts either the name of a predefined palette or an array of colors. The array can include the following colors:

• Hexadecimal colors
• RGB colors
• RGBA colors
• Predefined/cross-browser color names
• Predefined SVG colors

View Demo

See Also

• Palettes
• paletteExtensionMode
• DevExpress.viz.generateColors(palette, count, options)

The following variants are available:

• "blend"
  Create a blend of two neighboring colors and insert it between these colors in the palette.

• "alternate"
  Repeat the full set of palette colors, alternating their normal, lightened, and darkened shades in that order.

• "extrapolate"
  Repeat the full set of palette colors, changing their shade gradually from dark to light.

View Demo

If you place the UI component on a page that uses a tag modifying the path (<base>, <iframe>, etc.), some of the UI component elements may get mixed up or disappear. To solve this problem, set the pathModified property to true.

See Also

• DevExpress.viz.refreshPaths()

When this property is set to true, the UI component will be redrawn automatically in case the size of its parent window changes.

This property accepts values from the (0, 1) range.

When this property is set to true, the UI component text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.

DevExpress.config({
    rtlEnabled: true
});

The UI component occupies its container's entire area by default. Use the size object to specify the UI component's size if it should be different from that of its container. Assign 0 to size object's height and width properties to hide the UI component.

$(function() {
    $("#barGaugeContainer").dxBarGauge({
        // ...
        size: {
            height: 300,
            width: 600
        }
    });
});

<dx-bar-gauge ... >
    <dxo-size
        [height]="300"
        [width]="600">
    </dxo-size>
</dx-bar-gauge>

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    // ...
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxBarGaugeModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxBarGaugeModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

<template>
    <DxBarGauge ... >
        <DxSize
            :height="300"
            :width="600"
        />
    </DxBarGauge>
</template>

<script>

import DxBarGauge, {
    DxSize
} from 'devextreme-vue/bar-gauge';

export default {
    components: {
        DxBarGauge,
        DxSize
    },
    // ...
}
</script>

import React from 'react';

import BarGauge, {
    Size
} from 'devextreme-react/bar-gauge';

class App extends React.Component {
    render() {
        return (
            <BarGauge ... >
                <Size
                    height={300}
                    width={600}
                />
            </BarGauge>
        );
    }
}
export default App;

Alternatively, you can style the UI component's container using CSS:

$(function() {
    $("#barGauge").dxBarGauge({
        // ...
    });
});

#barGauge {
    width: 85%;
    height: 70%;
}

<dx-bar-gauge ...
    id="barGauge">
</dx-bar-gauge>

#barGauge {
    width: 85%;
    height: 70%;
}

<template>
    <DxBarGauge ...
        id="barGauge">
    </DxBarGauge>
</template>

<script>
import DxBarGauge from 'devextreme-vue/bar-gauge';

export default {
    components: {
        DxBarGauge
    },
    // ...
}
</script>

<style>
#barGauge {
    width: 85%;
    height: 70%;
}
</style>

import React from 'react';

import BarGauge from 'devextreme-react/bar-gauge';

class App extends React.Component {
    render() {
        return (
            <BarGauge ...
                id="barGauge">
            </BarGauge>
        );
    }
}
export default App;

#barGauge {
    width: 85%;
    height: 70%;
}

A theme is a UI component configuration that gives the UI component a distinctive appearance. You can use one of the predefined themes or create a custom one. Changing the property values in the UI component's configuration object overrides the theme's corresponding values.

The UI component's title is a short text that usually indicates what is visualized. If you need to specify the title's text only, assign it directly to the title property. Otherwise, set this property to an object with the text and other fields specified.

The title can be accompanied by a subtitle elaborating on the visualized subject using the title.subtitle object.

A tooltip is a miniature rectangle displaying the value of a gauge's bar. A tooltip appears when the end-user hovers the cursor over a bar. You can enable/disable tooltips, change their appearance and format their text using fields of the tooltip configuration object.

View Demo

Apart from specifying an array of values when configuring the BarGauge UI component, you can obtain this array at runtime using the values() method, and change it using the values(newValues) method.

View Demo