JavaScript/jQuery Gantt - columns.headerFilter
allowSearch
Use DataGrid search.enabled, TreeList search.enabled, or Gantt search.enabled instead.
dataSource
| Name | Type | Description |
|---|---|---|
| component |
The UI component's instance. |
|
| dataSource | | null |
A DataSource configuration. |
The Gantt generates a header filter's data source automatically based on column values. Each header filter item is an object that includes the following fields:
text
A text string that represents the item in the header filter.value
A filter that the item applies. It can be a single value (for example, 0) or a filter expression. Refer to the filter help topic for information on the filter expression syntax.
Use the dataSource property to change the generated data source or specify a custom data source. You can set the dataSource property to one of the following:
Array of objects
A JavaScript array that contains plain objects. For more information, refer to the Specify a Custom Data Source article.DataSource configuration object
A DataSource configuration object. For more information, refer to the Map Data Source Fields article.IMPORTANTDataSource instances are not supported.Store instance
An ArrayStore, LocalStore, ODataStore, or CustomStore instance.Function
A function that allows you to modify the incomingoptions.dataSourceparameter or override it and set it to one of the above. For more information, refer to the Change the Generated Data Source article.
groupInterval
Specifies how the header filter combines values into groups. Does not apply if you specify a custom header filter data source.
For numeric columns, assign a number to this property. This number designates a step with which to generate groups. Column values are classified into these groups.
For date columns, set this property to one of the accepted string values above. Dates are grouped into a hierarchy, and the string value indicates its lowest level. The default level is "day" which means that the header filter forms the following hierarchy: Year → Month → Day. You can disable the hierarchical display if you set the groupInterval to null. In this case, you also need to implement the column's calculateFilterExpression function as follows:
jQuery
$(function() {
$("#ganttContainer").dxGantt({
// ...
columns: [{
// ...
headerFilter: {
groupInterval: null
},
calculateFilterExpression(value, operation, target) {
if(value && target === "headerFilter") {
return [this.dataField, operation, value];
}
return this.defaultCalculateFilterExpression.apply(this, arguments);
}
}]
});
});Angular
<dx-gantt ... >
<dxi-column ...
[calculateFilterExpression]="calculateFilterExpression">
<dxo-header-filter
[groupInterval]="null">
</dxo-header-filter>
</dxi-column>
</dx-gantt>
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
calculateFilterExpression(value, operation, target) {
const column = this as any;
if(value && target === "headerFilter") {
return [column.dataField, operation, value];
}
return column.defaultCalculateFilterExpression.apply(column, arguments);
}
}
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxGanttModule } from 'devextreme-angular';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
DxGanttModule
],
providers: [ ],
bootstrap: [AppComponent]
})
export class AppModule { }Vue
<template>
<DxGantt ... >
<DxColumn ...
:calculate-filter-expression="calculateFilterExpression">
<DxHeaderFilter
:group-interval="null"
/>
</DxColumn>
</DxGantt>
</template>
<script>
import 'devextreme/dist/css/dx.light.css';
import DxGantt, {
DxColumn,
DxHeaderFilter
} from 'devextreme-vue/gantt';
export default {
components: {
DxGantt,
DxColumn,
DxHeaderFilter
},
data() {
return {
calculateFilterExpression(value, operation, target) {
const column = this as any;
if(value && target === "headerFilter") {
return [column.dataField, operation, value];
}
return column.defaultCalculateFilterExpression.apply(column, arguments);
}
}
}
}
</script>React
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import Gantt, {
Column,
HeaderFilter
} from 'devextreme-react/gantt';
function calculateFilterExpression (value, operation, target) {
if(value && target === "headerFilter") {
return [this.dataField, operation, value];
}
return this.defaultCalculateFilterExpression.apply(this, arguments);
}
export default function App() {
return (
<Gantt ... >
<Column ...
calculateFilterExpression={calculateFilterExpression}>
<HeaderFilter
groupInterval={null}
/>
</Column>
</Gantt>
);
}search
jQuery
$(function(){
$("#gantt").dxGantt({
// ...
columns: [
{
// ...
headerFilter: {
// ...
search: {
editorOptions: {
placeholder: 'Search city or state',
mode: 'text'
},
enabled: true,
timeout: 900,
searchExpr: ['City', 'State'],
mode: 'equals',
},
}
},
// ...
],
})
});Angular
<dx-gantt ... >
<dxi-column ... >
<dxo-header-filter ... >
<dxo-search
[editorOptions]="searchEditorOptions"
[enabled]="true"
[timeout]="900"
[searchExpr]="searchFields"
mode="equals"
></dxo-search>
</dxo-header-filter>
</dxi-column>
</dx-gantt>
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
searchEditorOptions;
searchFields;
constructor() {
this.searchEditorOptions = {
placeholder: 'Search city or state',
mode: 'text'
};
this.searchFields = ['City', 'State'];
// ...
}
// ...
}
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxGanttModule } from 'devextreme-angular';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
DxGanttModule
],
providers: [ ],
bootstrap: [AppComponent]
})
export class AppModule { } Vue
<template>
<DxGantt ... >
<DxColumn ... >
<DxHeaderFilter ... >
<DxSearch
:editor-options="searchEditorOptions"
:enabled="true"
:timeout="900"
:searchExpr="searchFields"
mode="equals"
/>
</DxHeaderFilter>
</DxColumn>
</DxGantt>
</template>
<script>
import 'devextreme/dist/css/dx.light.css';
import DxGantt, {
DxColumn,
DxHeaderFilter,
DxSearch,
// ...
} from 'devextreme-vue/gantt';
export default {
components: {
DxGantt,
DxColumn,
DxHeaderFilter,
DxSearch,
// ...
},
data() {
return {
searchEditorOptions: {
placeholder: 'Search city or state',
mode: 'text'
},
searchFields: ['City', 'State']
};
}
}
</script>
<template>
<DxGantt ... >
<DxColumn ... >
<DxHeaderFilter ... >
<DxSearch
:editor-options="searchEditorOptions"
:enabled="true"
:timeout="900"
:searchExpr="searchFields"
mode="equals"
/>
</DxHeaderFilter>
</DxColumn>
</DxGantt>
</template>
<script setup>
import 'devextreme/dist/css/dx.light.css';
import DxGantt, {
DxColumn,
DxHeaderFilter,
DxSearch,
// ...
} from 'devextreme-vue/gantt';
const searchFields = ['City', 'State'];
const searchEditorOptions = {
placeholder: 'Search city or state',
mode: 'text'
};
// ...
</script>React
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import Gantt, {
Column,
HeaderFilter,
Search,
// ...
} from 'devextreme-react/data-grid';
const searchFields = ['City', 'State'];
const searchEditorOptions = {
placeholder: 'Search city or state',
mode: 'text'
};
export default function App() {
return (
<Gantt ... >
<Column ... >
<HeaderFilter ... >
<Search
editorOptions={searchEditorOptions}
enabled={true}
timeout={700}
searchExpr={searchFields}
mode="equals"
/>
</HeaderFilter>
</Column>
</Gantt>
);
} See Also
searchMode
Use DataGrid search.mode, TreeList search.mode, or Gantt search.mode instead.