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Column Sizing

If you do not explicitly specify certain columns' width, the TreeList distributes the available space equally among columns at startup. As a result, cell values may appear truncated. Use the columnMinWidth property to specify a minimum width for all columns and the minWidth for an individual column. Note that all these settings may cause horizontal scrolling if columns cannot fit into the UI component's width.

jQuery
JavaScript
$(function() {
    $("#treeListContainer").dxTreeList({
        // ...
        columnMinWidth: 100,
        columns: [{
            dataField: "Title",
            width: 200
        }, {
            dataField: "Address",
            minWidth: 150
        }]
    });
});
Angular
HTML
TypeScript
<dx-tree-list ...
    [columnMinWidth]="100">
    <dxi-column dataField="Title" [width]="200"></dxi-column>
    <dxi-column dataField="Address" [minWidth]="150"></dxi-column>
</dx-tree-list>
import { DxTreeListModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxTreeListModule
    ],
    // ...
})
Vue
App.vue
<template>
    <DxTreeList ...
        :column-min-width="100">
        <DxColumn data-field="Title" :width="200" />
        <DxColumn data-field="Address" :min-width="150" />
    </DxTreeList>
</template>

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

import DxTreeList, {
    DxColumn
} from 'devextreme-vue/tree-list';

export default {
    components: {
        DxTreeList,
        DxColumn
    },
    // ...
}
</script>
React
App.js
import React from 'react';

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

import TreeList, {
    Column
} from 'devextreme-react/tree-list';

export default function App() {
    return (
        <TreeList ...
            columnMinWidth={100}>
            <Column dataField="Title" width={200} />
            <Column dataField="Address" minWidth={150} />
        </TreeList> 
    );
}

Set the columnAutoWidth property to true to make all columns adjust their widths to their content.

jQuery
JavaScript
$(function() {
    $("#treeListContainer").dxTreeList({
        // ...
        columnAutoWidth: true
    });
});
Angular
HTML
TypeScript
<dx-tree-list ...
    [columnAutoWidth]="true">
</dx-tree-list>
import { DxTreeListModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxTreeListModule
    ],
    // ...
})
Vue
App.vue
<template>
    <DxTreeList ...
        :column-auto-width="true">
    </DxTreeList>
</template>

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

import DxTreeList from 'devextreme-vue/tree-list';

export default {
    components: {
        DxTreeList
    },
    // ...
}
</script>
React
App.js
import React from 'react';

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

import TreeList from 'devextreme-react/tree-list';

export default function App() {
    return (
        <TreeList ...
            columnAutoWidth={true}>
        </TreeList>
    );
}

The UI component allows a user to resize columns in two different modes: by changing the next column's width or the UI component's width. To enable this functionality and set the mode, specify the allowColumnResizing and columnResizingMode properties, respectively. Note that you can prevent a specific column from being resized by assigning false to its allowResizing property.

jQuery
JavaScript
$(function() {
    $("#treeListContainer").dxTreeList({
        // ...
        allowColumnResizing: true,
        columnResizingMode: 'widget', // or 'nextColumn'
        columns: [{
            dataField: "Title",
            allowResizing: false
        }, // ...
        ]
    });
});
Angular
HTML
TypeScript
<dx-tree-list ...
    [allowColumnResizing]="true"
    columnResizingMode="widget"> <!-- or 'nextColumn' -->
    <dxi-column dataField="Title" [allowResizing]="false"></dxi-column>
</dx-tree-list>
import { DxTreeListModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxTreeListModule
    ],
    // ...
})
Vue
App.vue
<template>
    <DxTreeList ...
        :allow-column-resizing="true"
        column-resizing-mode="widget"> <!-- or "nextColumn" -->
        <DxColumn data-field="Title" :allow-resizing="false" />
    </DxTreeList>
</template>

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

import DxTreeList, {
    DxColumn
} from 'devextreme-vue/tree-list';

export default {
    components: {
        DxTreeList,
        DxColumn
    },
    // ...
}
</script>
React
App.js
import React from 'react';

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

import TreeList, {
    Column
} from 'devextreme-react/tree-list';

export default function App() {
    return (
        <TreeList ...
            allowColumnResizing={true}
            columnResizingMode="widget"> <!-- or 'nextColumn' -->
            <Column dataField="Title" allowResizing={false} />
        </TreeList>
    );
}

View Demo

See Also