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Adaptability

This demo demonstrates how the DevExtreme Toolbar component can adapt itself to different screen widths.

If you would like to learn more about our feature-complete Toolbar component, please refer to the following tutorial: Getting Started with Toolbar.

Backend API
@model DevExtreme.NETCore.Demos.ViewModels.ToolbarViewModel <div> <div class="widget-container"> @(Html.DevExtreme().Resizable() .ElementAttr("class", "resizable-container") .MinWidth(500) .MinHeight(150) .MaxHeight(370) .Handles(ResizeHandle.Right) .Area(".widget-container") .Content( Html.DevExtreme().Toolbar() .ID("toolbar") .Multiline(true) .Items(items => { items .Add() .Widget(w => w .Button() .Icon("undo") .OnClick("onUndoButtonClick") ) .Location(ToolbarItemLocation.Before); items .Add() .Widget(w => w .Button() .Icon("redo") .OnClick("onRedoButtonClick") ) .Location(ToolbarItemLocation.Before); items .Add() .Template(new TemplateName("separator-template")) .MenuItemTemplate(new TemplateName("menu-separator-template")) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .DropDownButton() .Width("100%") .DisplayExpr("Text") .KeyExpr("Value") .SelectedItemKey("14") .UseSelectMode(true) .DataSource(Model.FontSizes) .OnSelectionChanged("onFontSizeChanged") .ItemTemplate(new JS("fontSizeItemTemplate")) ) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .DropDownButton() .Width("100%") .DisplayExpr("Text") .KeyExpr("Value") .SelectedItemKey("1.35") .UseSelectMode(true) .DataSource(Model.LineHeights) .Icon("indent") .OnSelectionChanged("onLineHeightChanged") ) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .SelectBox() .Placeholder("Font") .DisplayExpr("Text") .InputAttr("aria-label", "Font") .DataSource(Model.FontFamilies) .OnItemClick("onFontFamilyClick") ) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Template(new TemplateName("separator-template")) .MenuItemTemplate(new TemplateName("menu-separator-template")) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .ButtonGroup() .KeyExpr("icon") .StylingMode(ButtonStylingMode.Outlined) .SelectionMode(ButtonGroupSelectionMode.Multiple) .Items(fontStyles => { fontStyles.Add().Icon("bold").Hint("Bold"); fontStyles.Add().Icon("italic").Hint("Italic"); fontStyles.Add().Icon("underline").Hint("Underlined"); fontStyles.Add().Icon("strike").Hint("Strikethrough"); }) .OnItemClick("onButtonGroupItemClick") ) .Location(ToolbarItemLocation.Before); items .Add() .Template(new TemplateName("separator-template")) .Location(ToolbarItemLocation.Before); items .Add() .Widget(w => w.ButtonGroup()) .Template(new TemplateName("text-align-template")) .MenuItemTemplate(new TemplateName("text-align-menu-template")) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .ButtonGroup() .KeyExpr("alignment") .StylingMode(ButtonStylingMode.Outlined) .Items(listTypes => { listTypes.Add().Icon("orderedlist").Hint("Ordered").Option("alignment", "orderedlist"); listTypes.Add().Icon("bulletlist").Hint("Bullet").Option("alignment", "bulletlist"); }) .OnItemClick("onButtonGroupItemClick") ) .Location(ToolbarItemLocation.Before); items .Add() .Template(new TemplateName("separator-template")) .MenuItemTemplate(new TemplateName("menu-separator-template")) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .SelectBox() .DisplayExpr("Text") .ValueExpr("Text") .InputAttr("aria-label", "Text Style") .DataSource(Model.Headings) .Value(Model.Headings.First().Text) .OnItemClick("onHeadingClick") ) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Template(new TemplateName("separator-template")) .MenuItemTemplate(new TemplateName("menu-separator-template")) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .Button() .Icon("link") .Text("Link") .OnClick("onLinkButtonClick") ) .ShowText(ToolbarItemShowTextMode.InMenu) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .Button() .Icon("image") .Text("Add image") .OnClick("onAddImageButtonClick") ) .ShowText(ToolbarItemShowTextMode.InMenu) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Template(new TemplateName("separator-template")) .MenuItemTemplate(new TemplateName("menu-separator-template")) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .Button() .Icon("clearformat") .Text("Clear formating") .OnClick("onClearButtonClick") ) .ShowText(ToolbarItemShowTextMode.InMenu) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .Button() .Icon("codeblock") .Text("Code block") .OnClick("onCodeBlockButtonClick") ) .ShowText(ToolbarItemShowTextMode.InMenu) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .Button() .Icon("blockquote") .Text("Blockquote") .OnClick("onQuoteButtonClick") ) .ShowText(ToolbarItemShowTextMode.InMenu) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Template(new TemplateName("separator-template")) .MenuItemTemplate(new TemplateName("menu-separator-template")) .Location(ToolbarItemLocation.Before) .LocateInMenu(ToolbarItemLocateInMenuMode.Auto); items .Add() .Widget(w => w .Button() .Icon("attach") .Text("Attach") .OnClick("onAttachButtonClick") ) .ShowText(ToolbarItemShowTextMode.InMenu) .Location(ToolbarItemLocation.After); items .Add() .Widget(w => w .Button() .Icon("help") .Text("About") .OnClick("onAboutButtonClick") ) .ShowText(ToolbarItemShowTextMode.InMenu) .LocateInMenu(ToolbarItemLocateInMenuMode.Always); } ).ToString() ) ) </div> <div class="options-container"> <div class="caption">Options</div> @(Html.DevExtreme().CheckBox() .ID("toolbar-mode") .Text("Multiline mode") .Value(true) .OnValueChanged("onToolbarModesValueChanged") ) </div> </div> @using (Html.DevExtreme().NamedTemplate("separator-template")) { <div class="toolbar-separator"></div> } @using (Html.DevExtreme().NamedTemplate("menu-separator-template")) { <div class="toolbar-menu-separator"></div> } @using (Html.DevExtreme().NamedTemplate("text-align-template")) { @(Html.DevExtreme().ButtonGroup() .KeyExpr("alignment") .StylingMode(ButtonStylingMode.Outlined) .Items(items => { items.Add().Icon("alignleft").Hint("Align Left").Option("alignment", "left"); items.Add().Icon("aligncenter").Hint("Center").Option("alignment", "center"); items.Add().Icon("alignright").Hint("Align Right").Option("alignment", "right"); items.Add().Icon("alignjustify").Hint("Justify").Option("alignment", "justify"); }) .SelectedItemKeys(new[] { "left" }) .OnItemClick("onButtonGroupItemClick")) } @using (Html.DevExtreme().NamedTemplate("text-align-menu-template")) { @(Html.DevExtreme().ButtonGroup() .KeyExpr("alignment") .StylingMode(ButtonStylingMode.Text) .Items(items => { items.Add().Icon("alignleft").Hint("Align Left").Option("alignment", "left").Option("text", "Align left"); items.Add().Icon("aligncenter").Hint("Center").Option("alignment", "center").Option("text", "Center"); items.Add().Icon("alignright").Hint("Align Right").Option("alignment", "right").Option("text", "Align right"); items.Add().Icon("alignjustify").Hint("Justify").Option("alignment", "justify").Option("text", "Justify"); }) .SelectedItemKeys(new[] { "left" }) .OnItemClick("onButtonGroupItemClick")) } <script> function fontSizeItemTemplate(itemData, itemIndex, itemElement) { itemElement.append( $("<div>").css({ fontSize: itemData.Text }).text(itemData.Text) ) } function onToolbarModesValueChanged({ value }) { var toolbar = $("#toolbar").dxToolbar("instance"); toolbar.option("multiline", value); toolbar.repaint() } function onFontFamilyClick() { DevExpress.ui.notify('The "Font Family" value has been changed'); } function onHeadingClick() { DevExpress.ui.notify('The "Heading" value has been changed'); } function onButtonGroupItemClick(e) { console.log(e) DevExpress.ui.notify(`The "${e.itemData.hint}" button has been clicked`); } function onFontSizeChanged() { DevExpress.ui.notify('The "Font Size" value has been changed'); } function onLineHeightChanged() { DevExpress.ui.notify('The "Line Height" value has been changed'); } function onUndoButtonClick() { DevExpress.ui.notify('The "Undo" button has been clicked'); } function onRedoButtonClick() { DevExpress.ui.notify('The "Redo" button has been clicked'); } function onLinkButtonClick() { DevExpress.ui.notify('The "Link" button has been clicked'); } function onAddImageButtonClick() { DevExpress.ui.notify('The "Add Image" button has been clicked'); } function onClearButtonClick() { DevExpress.ui.notify('The "Clear Formating" button has been clicked'); } function onCodeBlockButtonClick() { DevExpress.ui.notify('The "Code Block" button has been clicked'); } function onQuoteButtonClick() { DevExpress.ui.notify('The "Blockquote" button has been clicked'); } function onAttachButtonClick() { DevExpress.ui.notify('The "Attach" button has been clicked'); } function onAboutButtonClick() { DevExpress.ui.notify('The "About" button has been clicked'); } </script>
using DevExtreme.AspNet.Data; using DevExtreme.AspNet.Mvc; using DevExtreme.NETCore.Demos.Models.SampleData; using DevExtreme.NETCore.Demos.ViewModels; using Microsoft.AspNetCore.Mvc; using Newtonsoft.Json; using System.Linq; namespace DevExtreme.NETCore.Demos.Controllers { public class ToolbarController : Controller { public ActionResult Adaptability() { return View(new ToolbarViewModel() { FontFamilies = ToolbarData.FontFamilies, Headings = ToolbarData.Headings, FontSizes = ToolbarData.FontSizes, LineHeights = ToolbarData.LineHeights, }); } } }
using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace DevExtreme.NETCore.Demos.Models { public class SimpleData { public string Value { get; set; } public string Text { get; set; } } }
using System.Collections.Generic; namespace DevExtreme.NETCore.Demos.Models.SampleData { public partial class ToolbarData { public static readonly IEnumerable<SimpleData> FontFamilies = new[] { new SimpleData{ Text = "Arial", Value = "arial" }, new SimpleData{ Text = "Courier New", Value = "courier_new" }, new SimpleData{ Text = "Georgia", Value = "georgia" }, new SimpleData{ Text = "Impact", Value = "impact" }, new SimpleData{ Text = "Lucida Console", Value = "lucida_console" }, new SimpleData{ Text = "Tahoma", Value = "tahoma" }, new SimpleData{ Text = "Times New Roman", Value = "times_new_roman" } }; public static readonly IEnumerable<SimpleData> Headings = new[] { new SimpleData{ Text = "Normal text", Value = "normal_text" }, new SimpleData{ Text = "Heading 1", Value = "heading_1" }, new SimpleData{ Text = "Heading 2", Value = "heading_2" }, new SimpleData{ Text = "Heading 3", Value = "heading_3" }, new SimpleData{ Text = "Heading 4", Value = "heading_4" }, new SimpleData{ Text = "Heading 5", Value = "heading_5" } }; public static readonly IEnumerable<SimpleData> FontSizes = new[] { new SimpleData{ Text = "10px", Value = "10" }, new SimpleData{ Text = "12px", Value = "12" }, new SimpleData{ Text = "14px", Value = "14" }, new SimpleData{ Text = "16px", Value = "16" }, new SimpleData{ Text = "18px", Value = "18" } }; public static readonly IEnumerable<SimpleData> LineHeights = new[] { new SimpleData{ Text = "1", Value = "1" }, new SimpleData{ Text = "1.35", Value = "1.35" }, new SimpleData{ Text = "1.5", Value = "1.5" }, new SimpleData{ Text = "2", Value = "2" } }; } }
.dx-resizable-handle::after { content: ""; position: absolute; width: 9px; height: 36px; border: none; border-radius: 50px; background-color: #fff; box-shadow: 0 2px 6px 0 rgba(0, 0, 0, 0.24); } .dx-resizable-handle-right::after { top: 50%; right: -5px; transform: translateY(-50%); } .dx-toolbar.dx-toolbar-multiline .dx-toolbar-item { margin-bottom: 5px; } .widget-container { margin-right: 10px; } .resizable-container { padding: 10px; height: 300px; border: 1px dotted #999; border-radius: 4px; box-sizing: border-box; } .options-container { margin-top: 20px; padding: 20px; background-color: rgba(191, 191, 191, 0.15); position: relative; } .caption { font-size: 18px; font-weight: 500; margin-bottom: 10px; } .toolbar-separator { height: 36px; margin: 0 5px; border-left: 1px solid #ddd; } .toolbar-menu-separator { height: 1px; border-bottom: 1px solid #ddd; }

In this demo, you can drag our Toolbar container's resizing handle to visualize resize operations and view our rendering implementation on different screens. When used in single-line mode (default), our Toolbar does not wrap content and displays an overflow menu for items that do not fit within the container. Use the locateInMenu property to control whether items appear in the overflow menu.

If Toolbar width exceeds container width (and if you enable the component’s multiline property), our Toolbar wraps content across multiple lines.