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Gantt

Task Template

The DevExtreme JavaScript Gantt templates help customize the layout and appearance of individual task elements. Templates allow you to mix HTML code with any DevExtreme JavaScript component - and position desired elements within the container. In this demo, a template is used to display images within tasks and change their background color.

Implementation: Use the taskContentTemplate template to customize and align task information within the template container. For each task, use the item property to obtain task information (title, resource, progress) and wrap it into div elements. Then, apply CSS styles to these div elements and place them into the container.

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$(function() { var gantt = $("#gantt").dxGantt({ taskTitlePosition: "outside", scaleType: "days", tasks: { dataSource: tasks }, dependencies: { dataSource: dependencies }, resources: { dataSource: resources }, resourceAssignments: { dataSource: resourceAssignments }, editing: { enabled: false }, columns: [{ dataField: "title", caption: "Subject", width: 300 }, { dataField: "start", caption: "Start Date" }, { dataField: "end", caption: "End Date" }], taskListWidth: 500, taskContentTemplate: getTaskContentTemplate }).dxGantt("instance"); function getImagePath(taskId) { var imgPath = "../../../../images/employees/"; var img = taskId < 10 ? "0" + taskId : taskId; img = imgPath + img + ".png"; return img; } function getTaskContentTemplate(item, container) { var resource = item.taskResources[0]; var img = getImagePath(item.taskData.id); var color = item.taskData.id % 6; var taskWidth = item.taskSize.width + "px;"; var $customContainer = $(document.createElement("div")) .addClass("custom-task") .attr("style", "width:" + taskWidth) .addClass("custom-task-color-" + color); var $imgWrapper = $(document.createElement("div")) .addClass("custom-task-img-wrapper") .appendTo($customContainer); $(document.createElement("img")) .addClass("custom-task-img") .attr({ "src": resource ? img : "unknown.png", "alt": "imageAlt" }) .appendTo($imgWrapper); var $wrapper = $(document.createElement("div")) .addClass("custom-task-wrapper") .appendTo($customContainer); $(document.createElement("div")) .addClass("custom-task-title") .text(item.taskData.title) .appendTo($wrapper); $(document.createElement("div")) .addClass("custom-task-row") .text(resource ? resource.text : "") .appendTo($wrapper); $(document.createElement("div")) .addClass("custom-task-progress") .attr("style", "width:" + (parseFloat(item.taskData.progress)) + "%;") .appendTo($customContainer); return $customContainer; } });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <script src="https://cdn3.devexpress.com/jslib/21.1.3/js/dx-gantt.min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.3/css/dx.light.css" /> <link rel="stylesheet" href="https://cdn3.devexpress.com/jslib/21.1.3/css/dx-gantt.min.css" /> <script src="https://cdn3.devexpress.com/jslib/21.1.3/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="gantt"> </div> </div> </body> </html>
#gantt { height: 700px; } .custom-task-color-0 { background-color: #5C57C9; } .custom-task-color-1 { background-color: #35B86B; } .custom-task-color-2 { background-color: #4796CE; } .custom-task-color-3 { background-color: #CE4776; } .custom-task-color-4 { background-color: #CE5B47; } .custom-task-color-5 { background-color: #F78119; } .custom-task-color-6 { background-color: #9F47CE; } .custom-task { max-height: 48px; height: 100%; display: block; overflow: hidden; } .custom-task-wrapper { padding: 8px; color: #fff; } .custom-task-wrapper > * { display: block; overflow: hidden; text-overflow: ellipsis; } .custom-task-img-wrapper { float: left; width: 32px; height: 32px; border-radius: 50%; margin: 8px; background-color: #fff; overflow: hidden; } .custom-task-img { width: 32px; } .custom-task-title { font-weight: 600; font-size: 13px; } .custom-task-row { font-size: 11px; } .custom-task-progress { position: absolute; left: 0; bottom: 0; width: 0%; height: 4px; background: rgba(0, 0, 0, .3); } .dx-gantt .dx-row { height: 63px; }
var currentDate = new Date(Date.now()), month = currentDate.getMonth(), year = currentDate.getFullYear(); var tasks = [{ 'id': 1, 'parentId': 0, 'title': 'Analysis/Software Requirements', 'start': new Date(year, month, 1), 'end': new Date(year, month, 28), 'progress': 31 }, { 'id': 2, 'parentId': 1, 'title': 'Conduct needs analysis', 'start': new Date(year, month, 1), 'end': new Date(year, month, 3), 'progress': 15 }, { 'id': 3, 'parentId': 1, 'title': 'Draft preliminary software specifications', 'start': new Date(year, month, 3), 'end': new Date(year, month, 5), 'progress': 30 }, { 'id': 4, 'parentId': 1, 'title': 'Review software specifications/budget with team', 'start': new Date(year, month, 4), 'end': new Date(year, month, 6), 'progress': 60 }, { 'id': 5, 'parentId': 1, 'title': 'Incorporate feedback on software specifications', 'start': new Date(year, month, 6), 'end': new Date(year, month, 8), 'progress': 45 }, { 'id': 6, 'parentId': 1, 'title': 'Develop delivery timeline', 'start': new Date(year, month, 8), 'end': new Date(year, month, 14), 'progress': 15 }, { 'id': 7, 'parentId': 1, 'title': 'Obtain approvals to proceed (concept, timeline, budget)', 'start': new Date(year, month, 14), 'end': new Date(year, month, 20), 'progress': 15 },{ 'id': 8, 'parentId': 1, 'title': 'Draft preliminary software specifications', 'start': new Date(year, month, 20), 'end': new Date(year, month, 25), 'progress': 0 },{ 'id': 9, 'parentId': 1, 'title': 'Secure required resources', 'start': new Date(year, month , 25), 'end': new Date(year, month, 28), 'progress': 0 } ]; var dependencies = [{ 'id': 1, 'predecessorId': 2, 'successorId': 3, 'type': 0 }, { 'id': 2, 'predecessorId': 3, 'successorId': 4, 'type': 0 }, { 'id': 3, 'predecessorId': 4, 'successorId': 5, 'type': 0 }, { 'id': 4, 'predecessorId': 5, 'successorId': 6, 'type': 0 }, { 'id': 5, 'predecessorId': 6, 'successorId': 7, 'type': 0 }, { 'id': 6, 'predecessorId': 7, 'successorId': 8, 'type': 0 }, { 'id': 7, 'predecessorId': 8, 'successorId': 9, 'type': 0 }]; var resources = [{ 'id': 1, 'text': 'John Heart' }, { 'id': 2, 'text': 'Paul Peyton' }, { 'id': 3, 'text': 'Robert Reagan' }, { 'id': 4, 'text': 'Greta Sims' }, { 'id': 5, 'text': 'Brett Wade' }, { 'id': 6, 'text': 'Sandra Johnson' }, { 'id': 7, 'text': 'Kevin Carter' }, { 'id': 8, 'text': 'Cynthia Stanwick' },{ 'id': 9, 'text': 'Olivia Samuelson' }]; var resourceAssignments = [{ 'id': 0, 'taskId': 1, 'resourceId': 1 }, { 'id': 1, 'taskId': 2, 'resourceId': 2 }, { 'id': 2, 'taskId': 3, 'resourceId': 3 }, { 'id': 3, 'taskId': 4, 'resourceId': 4 }, { 'id': 4, 'taskId': 5, 'resourceId': 5 }, { 'id': 5, 'taskId': 6, 'resourceId': 6 }, { 'id': 6, 'taskId': 7, 'resourceId': 7 }, { 'id': 7, 'taskId': 8, 'resourceId': 8 }, { 'id': 8, 'taskId': 9, 'resourceId': 9 }];