Angular Common - Utils - viz

The current palette's name.

jQuery

index.js

var paletteName = DevExpress.viz.currentPalette();
// ===== or when using modules =====
import { currentPalette } from 'devextreme/viz/palette';

let paletteName = currentPalette();

Angular

app.component.ts

import { currentPalette } from 'devextreme/viz/palette';

let paletteName = currentPalette();

Vue

App.vue

import { currentPalette } from 'devextreme/viz/palette';

let paletteName = currentPalette();

React

App.js

import { currentPalette } from 'devextreme/viz/palette';

let paletteName = currentPalette();

currentPalette(paletteName)

Changes the current palette for all data visualization UI components on the page.

import { DxPaletteTypes } from "devextreme-angular/ui/palette"

Parameters:

paletteName:

A new palette's name.

Only the UI components created after calling this method use the new palette. Refresh the styling settings in other UI components using the DevExpress.viz.refreshTheme() method.

currentTheme()

Gets the current theme's name.

import { DxThemesTypes } from "devextreme-angular/ui/themes"

Return Value:

The current theme's name.

currentTheme(platform, colorScheme)

Changes the current theme for all data visualization UI components on the page. The color scheme is defined separately.

import { DxThemesTypes } from "devextreme-angular/ui/themes"

Parameters:

platform:

The platform name or "generic".

colorScheme:

The color scheme: "light" or "dark".

Only the UI components created after calling this method use the new theme. Refresh the styling settings in other UI components using the DevExpress.viz.refreshTheme() method.

currentTheme(theme)

Changes the current theme for all data visualization UI components on the page.

import { DxThemesTypes } from "devextreme-angular/ui/themes"

Parameters:

theme:

The new theme's name.

Only the UI components created after calling this method use the new theme. Use the DevExpress.viz.refreshTheme() method to refresh the styling settings in other UI components.

exportFromMarkup(markup, options)

Allows you to export UI components using their SVG markup.

import { DxExportTypes } from "devextreme-angular/ui/export"

Parameters:

markup:

|

HTMLElement | jQuery

The SVG markup of the UI components you want to export.

options:

Export properties.

Object structure:

Name	Type	Description
backgroundColor	String	The color that fills transparent regions.
fileName	String	The name of the file to be saved.
format	String	The file's format. One of 'PNG', 'PDF', 'JPEG', 'SVG' and 'GIF'. PNG is used if the browser does not support exporting to the specified format.
height	Number	The SVG block's height in pixels. This field is required.
margin	Number	An empty space to be added around the exported SVG block; measured in pixels.
onExported	Function	Allows you to notify a user when exporting completes.
onExporting	Function	Allows you to request exporting details and prevent exporting. The parameter contains the following fields: fileName - the name of the file to be saved. format - the file's format. One of 'PNG', 'PDF', 'JPEG', 'SVG' and 'GIF'. cancel - when assigned true, prevents exporting.
onFileSaving	Function	Allows you to access exported data and/or prevent it from being saved to a file on the user's local storage. The parameter contains the following fields: fileName - the name of the file to be saved. format - the file's format. One of 'PNG', 'PDF', 'JPEG', 'SVG' and 'GIF'. data - exported data as a BLOB. cancel - when assigned true, prevents the file from being saved.
svgToCanvas	Function	A function that renders SVG markup on the HTML canvas. Refer to the svgToCanvas description for details.
width	Number	The SVG block's width in pixels. This field is required.

IMPORTANT

We recommend that you do not use the foreignObject element to define markup (Safari does not support this element).

exportWidgets(widgetInstances)

Exports one or several UI components to PNG.

import { DxExportTypes } from "devextreme-angular/ui/export"

Parameters:

widgetInstances:

An array with the following format:

[
    [ widgetInstance0_1, widgetInstance0_2, ..., widgetInstance0_N ],
    [ widgetInstance1_1, widgetInstance1_2, ..., widgetInstance1_M ],
    ...
    [ widgetInstanceP_1, widgetInstanceP_2, ..., widgetInstanceP_R ]
]

Each nested array contains UI component instances that should be in the same row in the exported document.

exportWidgets(widgetInstances, options)

Exports one or several UI components.

import { DxExportTypes } from "devextreme-angular/ui/export"

Parameters:

widgetInstances:

An array with the following format:

[
    [ widgetInstance0_1, widgetInstance0_2, ..., widgetInstance0_N ],
    [ widgetInstance1_1, widgetInstance1_2, ..., widgetInstance1_M ],
    ...
    [ widgetInstanceP_1, widgetInstanceP_2, ..., widgetInstanceP_R ]
]

Each nested array contains UI component instances that should be in the same row in the exported document.

options:

Export properties.

Object structure:

Name	Type	Description
backgroundColor	String	The background color.
fileName	String	The name of the file to be saved.
format	ExportFormat	The file's format. PNG is used if the browser cannot export the file in the specified format.
gridLayout	Boolean	If true, UI components are arranged in columns with equal widths (the width of the widest UI component). If false, UI components are placed next to each other in rows (default). In any case, each row has the height of the highest UI component in it.
horizontalAlignment	HorizontalAlignment	Horizontally aligns UI components in their columns. Applies only when gridLayout is true.
margin	Number	Margins to be added to each side of the document; measured in pixels.
onExported	Function	Allows you to notify a user when the export is completed.
onExporting	Function	Allows you to request export details and prevent export. The parameter contains the following fields: fileName - the name of the file to be saved. format - the file's format. One of 'PNG', 'PDF', 'JPEG', 'SVG' and 'GIF'. cancel - prevents export when assigned true.
onFileSaving	Function	Allows you to access exported data and/or prevent it from being saved to a file in the user's local storage. The parameter contains the following fields: fileName - the name of the file to be saved. format - the file's format. One of 'PNG', 'PDF', 'JPEG', 'SVG' and 'GIF'. data - exported data as a BLOB. cancel - when assigned true, prevents the file from being saved.
svgToCanvas	Function	A function that renders SVG markup on the HTML canvas. Refer to the svgToCanvas description for details.
verticalAlignment	VerticalAlignment	Vertically aligns UI components in their rows.

generateColors(palette, count, options)

Returns a subset of palette colors.

import { DxPaletteTypes } from "devextreme-angular/ui/palette"

Parameters:

palette:

Palette

|

Array<String>

A palette name or an array of colors. See palette for more information.

count:

The number of colors in the resulting subset.

options:

Optional settings.

Object structure:

Name	Type	Description
baseColorSet	PaletteColorSet	The color set that provides the colors. The default value is "simpleSet". See getPalette(paletteName) for more information.
paletteExtensionMode	PaletteExtensionMode	The mode in which the palette should be extended when it contains less colors than specified in the count parameter. The default value is "blend". See paletteExtensionMode for more information.

Name

Type

Description

baseColorSet

PaletteColorSet

The color set that provides the colors. The default value is "simpleSet".
See getPalette(paletteName) for more information.

paletteExtensionMode

PaletteExtensionMode

The mode in which the palette should be extended when it contains less colors than specified in the count parameter. The default value is "blend".
See paletteExtensionMode for more information.

Return Value:

Array<String>

Colors in hexadecimal format.

The following code generates ten colors from the Material palette's gradient color set:

jQuery

index.js

var colors = DevExpress.viz.generateColors('Material', 10, { baseColorSet: 'gradientSet' });
// ===== or when using modules =====
import { generateColors } from 'devextreme/viz/palette';

let colors = generateColors('Material', 10, { baseColorSet: 'gradientSet' });

Angular

app.component.ts

import { generateColors } from 'devextreme/viz/palette';

let colors = generateColors('Material', 10, { baseColorSet: 'gradientSet' });

Vue

App.vue

import { generateColors } from 'devextreme/viz/palette';

let colors = generateColors('Material', 10, { baseColorSet: 'gradientSet' });

React

App.js

import { generateColors } from 'devextreme/viz/palette';

let colors = generateColors('Material', 10, { baseColorSet: 'gradientSet' });

Use the generated colors to paint elements of different UI components in identical colors. For instance, you can assign the same colors to series in two different charts to indicate the visualized information is connected.

getMarkup(widgetInstances)

Gets the SVG markup of specific UI components for their subsequent export.

import { DxExportTypes } from "devextreme-angular/ui/export"

Parameters:

widgetInstances:

The UI component instances.

Return Value:

The UI components' SVG markup. Pass it to the exportFromMarkup(markup, options) method to export the UI components.

getPalette(paletteName)

Gets the color sets of a predefined or registered palette.

import { DxPaletteTypes } from "devextreme-angular/ui/palette"

Parameters:

paletteName:

The palette's name.

Return Value:

The palette's settings.

The returned value is an object of the following structure:

JavaScript

{
    // Applies in the BarGauge, Chart, Funnel, PieChart, PolarChart, Sankey, and TreeMap with a discrete colorizer
    simpleSet: ['#60a69f', '#78b6d9', '#6682bb', '#a37182', '#eeba69'], 
    // Applies in the CircularGauge and LinearGauge
    indicatingSet: ['#90ba58', '#eeba69', '#a37182'], 
    // Applies in the VectorMap and TreeMap with a gradient or range colorizer 
    gradientSet: ['#78b6d9', '#eeba69'] 
}

The built-in palettes are listed in the Appearance Customization topic.

getTheme(theme)

Gets a predefined or registered theme's settings.

import { DxThemesTypes } from "devextreme-angular/ui/themes"

Parameters:

theme:

The theme's name.

Return Value:

The theme's settings.

map

An object that serves as a namespace for the VectorMap UI component.

refreshPaths()

The method to be called every time the active entry in the browser history is modified without reloading the current page.

import { DxUtilsTypes } from "devextreme-angular/ui/utils"

Each data visualization UI component addresses its inner elements by their URLs. Those URLs break when the active history entry is modified without reloading the current page (see Adding and modifying history entries). As a result, some UI component elements may get mixed up or disappear completely. To fix the URLs, call the refreshPaths() method right after the history entry modification, and in the onpopstate event handler or, if you use a routing library, in its counterpart.

JavaScript

window.history.pushState({ foo: "bar" }, "title", "?foo=bar");
DevExpress.viz.refreshPaths();

window.onpopstate = function(event) {
    DevExpress.viz.refreshPaths();
}

The problem with broken URLs may also emerge if the page uses a path modifying HTML tag; for example, <base> or <iframe>. To resolve it, set the pathModified property of the UI component to true.

refreshTheme()

Refreshes the current theme and palette in all data visualization UI components on the page.

import { DxThemesTypes } from "devextreme-angular/ui/themes"

The refreshTheme() method calls refresh() to reload data and update the UI of all data visualization components after applying a new theme.

registerGradient(type, options)

Registers a new gradient.

import { registerGradient } from "devextreme/common/charts"

Parameters:

type:

Gradient type: 'linear' or 'radial'.

options:

Gradient's settings.

Object structure:

Name	Type	Description
colors	Array<GradientColor>	An array of gradient colors.
rotationAngle	Number	Linear gradient rotation angle.

Name

Type

Description

colors

Array<GradientColor>

An array of gradient colors.

rotationAngle

Linear gradient rotation angle.

Return Value:

Fill ID.

Call this method to register a gradient ID. Assign the ID to a component's color.fillId field.

jQuery

index.js

const registerGradient = DevExpress.common.charts.registerGradient;

$(() => {
    $('#chart').dxChart({
        // ...
        commonSeriesSettings: {
            color: {
                base: "#f5564a",
                fillId: registerGradient("linear", {
                    colors: [{
                        offset: "20%",
                        color: "#97c95c"
                    }, {
                        offset: "90%",
                        color: "#eb3573"
                    }]
                })
            }
        }
    });
});

Angular

app.component.html

app.component.ts

<dx-chart ... >
    <dxo-common-series-settings [color]="seriesColor">
    </dxo-common-series-settings>
</dx-chart>

import { registerGradient } from "devextreme/common/charts";

export class AppComponent {
    seriesColor = {
        base: "#f5564a",
        fillId: registerGradient("linear", {
            colors: [{
                offset: "20%",
                color: "#97c95c"
            }, {
                offset: "90%",
                color: "#eb3573"
            }]
        });
    };
}

Vue

App.vue (Options API)

App.vue (Composition API)

<template>
    <DxChart ... >
        <DxCommonSeriesSettings 
            :color="seriesColor"
        />
    </DxChart>
</template>
<script>
    import DxChart, { DxCommonSeriesSettings } from 'devextreme-vue/chart';
    import { registerGradient } from 'devextreme/common/charts';

    export default {
        components: {
            DxChart,
            DxCommonSeriesSettings
        },
        data() {
            return {
                // ...
                seriesColor: {
                    base: '#f5564a',
                    fillId: registerGradient("linear", {
                        colors: [{
                            offset: "20%",
                            color: "#97c95c"
                        }, {
                            offset: "90%",
                            color: "#eb3573"
                        }]
                    })
                }
            }
        }
    };
</script>

<template>
    <DxChart ... >
        <DxCommonSeriesSettings 
            :color="seriesColor"
        />
    </DxChart>
</template>
<script setup>
    import DxChart, { DxCommonSeriesSettings } from 'devextreme-vue/chart';
    import { registerGradient } from 'devextreme/common/charts';

    // ...

    const seriesColor = {
        base: '#f5564a',
        fillId: registerGradient("linear", {
            colors: [{
                offset: "20%",
                color: "#97c95c"
            }, {
                offset: "90%",
                color: "#eb3573"
            }]
        })
    };
</script>

React

App.js

import Chart, { CommonSeriesSettings } from 'devextreme-react/chart';
import { registerGradient } from 'devextreme/common/charts';

const seriesColor = {
    base: "#f5564a",
    fillId: registerGradient("linear", {
        colors: [{
            offset: "20%",
            color: "#97c95c"
        }, {
            offset: "90%",
            color: "#eb3573"
        }]
    })
};

export default function App() {
    return (
        <Chart ... >
            <CommonSeriesSettings 
                color={seriesColor}
            />
        </Chart>
    );
}

NOTE

To correctly export a component with transparent gradient, specify gradient colors in RGBA format.
Radial and rotated linear gradients may look slightly different when exported.

registerPalette(paletteName, palette)

Registers a new palette.

import { DxPaletteTypes } from "devextreme-angular/ui/palette"

Parameters:

paletteName:

The palette's name.

palette:

The palette's settings.

The palette settings is an object of the following structure:

JavaScript

{
    // Applies in the BarGauge, Chart, Funnel, PieChart, PolarChart, Sankey, and TreeMap with a discrete colorizer
    simpleSet: ['#60a69f', '#78b6d9', '#6682bb', '#a37182', '#eeba69'], 
    // Applies in the CircularGauge and LinearGauge
    indicatingSet: ['#90ba58', '#eeba69', '#a37182'], 
    // Applies in the VectorMap and TreeMap with a gradient or range colorizer 
    gradientSet: ['#78b6d9', '#eeba69'] 
}

registerPattern(options)

Registers a new pattern.

import { registerPattern } from "devextreme/common/charts"

Parameters:

options:

Pattern settings.

Object structure:

Name	Type	Description
height	Number \| String	Template height.
template	Function	SVG-based pattern template.
width	Number \| String	Template width.

Name

Type

Description

height

|

Template height.

template

Function

SVG-based pattern template.

width

|

Template width.

Return Value:

Fill ID.

Call this method to register a pattern ID. Assign the ID to a component's color.fillId field.

The following example demonstrates how to create a stroke pattern. Use a d SVG attribute to draw a path for a pattern.

jQuery

index.js

const registerPattern = DevExpress.common.charts.registerPattern;

$(() => {
    $('#chart').dxChart({
        // ...
        commonSeriesSettings: {
            color: {
                base: "#f5564a",
                fillId: registerPattern({
                    width: 5,
                    height: 5,
                    template: (container) => {
                        const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
                        path.setAttribute('stroke', '#97c95c');
                        path.setAttribute('stroke-width', 1.5);
                        path.setAttribute('d', `M 2.5 -2.5 L -2.5 2.5 M 0 5 L 5 0 M 7.5 2.5 L 2.5 7.5`);
                        container.appendChild(path);
                    },
                })
            }
        }
    });
});

Angular

app.component.html

app.component.ts

<dx-chart ... >
    <dxo-common-series-settings [color]="seriesColor">
    </dxo-common-series-settings>
</dx-chart>

import { registerPattern } from "devextreme/common/charts";

export class AppComponent {
    seriesColor = {
        base: "#f5564a",
        fillId: registerPattern({
            width: 5,
            height: 5,
            template: (container) => {
                const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
                path.setAttribute('stroke', '#97c95c');
                path.setAttribute('stroke-width', 1.5);
                path.setAttribute('d', `M 2.5 -2.5 L -2.5 2.5 M 0 5 L 5 0 M 7.5 2.5 L 2.5 7.5`);
                container.appendChild(path);
            },
        })
    };
}

Vue

App.vue (Options API)

App.vue (Composition API)

<template>
    <DxChart ... >
        <DxCommonSeriesSettings 
            :color="seriesColor"
        />
    </DxChart>
</template>
<script>
    import DxChart, { DxCommonSeriesSettings } from 'devextreme-vue/chart';
    import { registerPattern } from 'devextreme/common/charts';

    export default {
        components: {
            DxChart,
            DxCommonSeriesSettings
        },
        data() {
            return {
                // ...
                seriesColor: {
                    base: '#f5564a',
                    fillId: registerPattern({
                        width: 5,
                        height: 5,
                        template: (container) => {
                            const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
                            path.setAttribute('stroke', '#97c95c');
                            path.setAttribute('stroke-width', 1.5);
                            path.setAttribute('d', `M 2.5 -2.5 L -2.5 2.5 M 0 5 L 5 0 M 7.5 2.5 L 2.5 7.5`);
                            container.appendChild(path);
                        },
                    })
                }
            }
        }
    };
</script>

<template>
    <DxChart ... >
        <DxCommonSeriesSettings 
            :color="seriesColor"
        />
    </DxChart>
</template>
<script setup>
    import DxChart, { DxCommonSeriesSettings } from 'devextreme-vue/chart';
    import { registerPattern } from 'devextreme/common/charts';

    // ...

    const seriesColor = {
        base: '#f5564a',
        fillId: registerPattern({
            width: 5,
            height: 5,
            template: (container) => {
                const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
                path.setAttribute('stroke', '#97c95c');
                path.setAttribute('stroke-width', 1.5);
                path.setAttribute('d', `M 2.5 -2.5 L -2.5 2.5 M 0 5 L 5 0 M 7.5 2.5 L 2.5 7.5`);
                container.appendChild(path);
            },
        })
    };
</script>

React

App.js

import Chart, { CommonSeriesSettings } from 'devextreme-react/chart';
import { registerPattern } from 'devextreme/common/charts';

const seriesColor = {
    base: "#f5564a",
    fillId: registerPattern({
        width: 5,
        height: 5,
        template: (container) => {
            const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
            path.setAttribute('stroke', '#97c95c');
            path.setAttribute('stroke-width', 1.5);
            path.setAttribute('d', `M 2.5 -2.5 L -2.5 2.5 M 0 5 L 5 0 M 7.5 2.5 L 2.5 7.5`);
            container.appendChild(path);
        },
    })
};

export default function App() {
    return (
        <Chart ... >
            <CommonSeriesSettings 
                color={seriesColor}
            />
        </Chart>
    );
}

NOTE

For the component export to work correctly, the size of a pattern template must be specified in pixels or a CSS-specified measure of size (excluding percent).

registerTheme(customTheme, baseTheme)

Registers a new theme based on the existing one.

import { DxThemesTypes } from "devextreme-angular/ui/themes"

Parameters:

customTheme:

The theme's settings.

baseTheme: