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Tree List

Node Drag-and-Drop

Node drag-and-drop is configured in the rowDragging object. To enable this feature, set allowReordering to true and implement the onReorder and onDragChange functions. If users should be allowed to drop nodes inside other nodes, enable the allowDropInsideItem option.

In the onReorder function, change the parent ID of the reordered node and the node's index in the data array. If the node was dropped inside another node, changing the parent ID is sufficient. Refresh() the TreeList after these manipulations.

Use the onDragChange function to prevent users from moving a node inside its child node. Check whether the source node's and target node's IDs are equal. If they are, cancel the ability to drop the node.

In this demo, the checkboxes under the TreeList allow you to change the allowReordering, allowDropInsideItem, and showDragIcons options at runtime. The latter option controls the visibility of drag icons. When the icons are displayed, they are used as drag handles. Otherwise, the drag handle is the entire row.

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$(function() { var treeList = $("#employees").dxTreeList({ dataSource: employees, rootValue: -1, keyExpr: "ID", rowDragging: { allowDropInsideItem: true, allowReordering: true, onDragChange: function(e) { var visibleRows = treeList.getVisibleRows(), sourceNode = treeList.getNodeByKey(e.itemData.ID), targetNode = visibleRows[e.toIndex].node; while (targetNode && targetNode.data) { if (targetNode.data.ID === sourceNode.data.ID) { e.cancel = true; break; } targetNode = targetNode.parent; } }, onReorder: function(e) { var visibleRows = e.component.getVisibleRows(), sourceData = e.itemData, targetData = visibleRows[e.toIndex].data; if (e.dropInsideItem) { e.itemData.Head_ID = targetData.ID; } else { var sourceIndex = employees.indexOf(sourceData), targetIndex = employees.indexOf(targetData); if (sourceData.Head_ID !== targetData.Head_ID) { sourceData.Head_ID = targetData.Head_ID; if (e.toIndex > e.fromIndex) { targetIndex++; } } employees.splice(sourceIndex, 1); employees.splice(targetIndex, 0, sourceData); } e.component.refresh(); } }, parentIdExpr: "Head_ID", columns: [{ dataField: "Title", caption: "Position" }, "Full_Name", "City", "State", "Mobile_Phone", { dataField: "Hire_Date", dataType: "date" }], expandedRowKeys: [1], showRowLines: true, showBorders: true, columnAutoWidth: true }).dxTreeList("instance"); $("#allowDropInside").dxCheckBox({ text: "Allow Drop Inside Item", value: true, onValueChanged: function(e) { treeList.option("rowDragging.allowDropInsideItem", e.value); } }); $("#allowReordering").dxCheckBox({ text: "Allow Reordering", value: true, onValueChanged: function(e) { treeList.option("rowDragging.allowReordering", e.value); } }); $("#dragIcons").dxCheckBox({ text: "Show Drag Icons", value: true, onValueChanged: function(e) { treeList.option("rowDragging.showDragIcons", e.value); } }); });
<!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/3.4.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/19.2.3/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="tree-list-demo"> <div id="employees"></div> </div> <div class="options"> <div class="caption">Options</div> <div class="option"> <div id="allowDropInside"></div> </div> <div class="option"> <div id="allowReordering"></div> </div> <div class="option"> <div id="dragIcons"></div> </div> </div> </div> </body> </html>
#employees { max-height: 440px; } .dx-sortable-dragging { opacity: 0.9 } .options { margin-top: 20px; padding: 20px; background-color: rgba(191, 191, 191, 0.15); position: relative; } .caption { font-size: 18px; font-weight: 500; } .option { margin-top: 10px; margin-right: 40px; display: inline-block; } .option:last-child { margin-right: 0; }
var employees = [{ "ID": 1, "Head_ID": -1, "Full_Name": "John Heart", "Prefix": "Mr.", "Title": "CEO", "City": "Los Angeles", "State": "California", "Email": "jheart@dx-email.com", "Skype": "jheart_DX_skype", "Mobile_Phone": "(213) 555-9392", "Birth_Date": "1964-03-16", "Hire_Date": "1995-01-15" }, { "ID": 2, "Head_ID": 1, "Full_Name": "Samantha Bright", "Prefix": "Dr.", "Title": "COO", "City": "Los Angeles", "State": "California", "Email": "samanthab@dx-email.com", "Skype": "samanthab_DX_skype", "Mobile_Phone": "(213) 555-2858", "Birth_Date": "1966-05-02", "Hire_Date": "2004-05-24" }, { "ID": 3, "Head_ID": 1, "Full_Name": "Arthur Miller", "Prefix": "Mr.", "Title": "CTO", "City": "Denver", "State": "Colorado", "Email": "arthurm@dx-email.com", "Skype": "arthurm_DX_skype", "Mobile_Phone": "(310) 555-8583", "Birth_Date": "1972-07-11", "Hire_Date": "2007-12-18" }, { "ID": 4, "Head_ID": 1, "Full_Name": "Robert Reagan", "Prefix": "Mr.", "Title": "CMO", "City": "Bentonville", "State": "Arkansas", "Email": "robertr@dx-email.com", "Skype": "robertr_DX_skype", "Mobile_Phone": "(818) 555-2387", "Birth_Date": "1974-09-07", "Hire_Date": "2002-11-08" }, { "ID": 5, "Head_ID": 1, "Full_Name": "Greta Sims", "Prefix": "Ms.", "Title": "HR Manager", "City": "Atlanta", "State": "Georgia", "Email": "gretas@dx-email.com", "Skype": "gretas_DX_skype", "Mobile_Phone": "(818) 555-6546", "Birth_Date": "1977-11-22", "Hire_Date": "1998-04-23" }, { "ID": 6, "Head_ID": 3, "Full_Name": "Brett Wade", "Prefix": "Mr.", "Title": "IT Manager", "City": "Reno", "State": "Nevada", "Email": "brettw@dx-email.com", "Skype": "brettw_DX_skype", "Mobile_Phone": "(626) 555-0358", "Birth_Date": "1968-12-01", "Hire_Date": "2009-03-06" }, { "ID": 7, "Head_ID": 5, "Full_Name": "Sandra Johnson", "Prefix": "Mrs.", "Title": "Controller", "City": "Beaver", "State": "Utah", "Email": "sandraj@dx-email.com", "Skype": "sandraj_DX_skype", "Mobile_Phone": "(562) 555-2082", "Birth_Date": "1974-11-15", "Hire_Date": "2005-05-11" }, { "ID": 8, "Head_ID": 4, "Full_Name": "Ed Holmes", "Prefix": "Dr.", "Title": "Sales Manager", "City": "Malibu", "State": "California", "Email": "edwardh@dx-email.com", "Skype": "edwardh_DX_skype", "Mobile_Phone": "(310) 555-1288", "Birth_Date": "1973-07-14", "Hire_Date": "2005-06-19" }, { "ID": 9, "Head_ID": 3, "Full_Name": "Barb Banks", "Prefix": "Mrs.", "Title": "Support Manager", "City": "Phoenix", "State": "Arizona", "Email": "barbarab@dx-email.com", "Skype": "barbarab_DX_skype", "Mobile_Phone": "(310) 555-3355", "Birth_Date": "1979-04-14", "Hire_Date": "2002-08-07" }, { "ID": 10, "Head_ID": 2, "Full_Name": "Kevin Carter", "Prefix": "Mr.", "Title": "Shipping Manager", "City": "San Diego", "State": "California", "Email": "kevinc@dx-email.com", "Skype": "kevinc_DX_skype", "Mobile_Phone": "(213) 555-2840", "Birth_Date": "1978-01-09", "Hire_Date": "2009-08-11" }, { "ID": 11, "Head_ID": 5, "Full_Name": "Cindy Stanwick", "Prefix": "Ms.", "Title": "HR Assistant", "City": "Little Rock", "State": "Arkansas", "Email": "cindys@dx-email.com", "Skype": "cindys_DX_skype", "Mobile_Phone": "(818) 555-6655", "Birth_Date": "1985-06-05", "Hire_Date": "2008-03-24" }, { "ID": 12, "Head_ID": 8, "Full_Name": "Sammy Hill", "Prefix": "Mr.", "Title": "Sales Assistant", "City": "Pasadena", "State": "California", "Email": "sammyh@dx-email.com", "Skype": "sammyh_DX_skype", "Mobile_Phone": "(626) 555-7292", "Birth_Date": "1984-02-17", "Hire_Date": "2012-02-01" }, { "ID": 13, "Head_ID": 10, "Full_Name": "Davey Jones", "Prefix": "Mr.", "Title": "Shipping Assistant", "City": "Pasadena", "State": "California", "Email": "davidj@dx-email.com", "Skype": "davidj_DX_skype", "Mobile_Phone": "(626) 555-0281", "Birth_Date": "1983-03-06", "Hire_Date": "2011-04-24" }, { "ID": 14, "Head_ID": 10, "Full_Name": "Victor Norris", "Prefix": "Mr.", "Title": "Shipping Assistant", "City": "Little Rock", "State": "Arkansas", "Email": "victorn@dx-email.com", "Skype": "victorn_DX_skype", "Mobile_Phone": "(213) 555-9278", "Birth_Date": "1986-07-23", "Hire_Date": "2012-07-23" }, { "ID": 15, "Head_ID": 10, "Full_Name": "Mary Stern", "Prefix": "Ms.", "Title": "Shipping Assistant", "City": "Beaver", "State": "Utah", "Email": "marys@dx-email.com", "Skype": "marys_DX_skype", "Mobile_Phone": "(818) 555-7857", "Birth_Date": "1982-04-08", "Hire_Date": "2012-08-12" }, { "ID": 16, "Head_ID": 10, "Full_Name": "Robin Cosworth", "Prefix": "Mrs.", "Title": "Shipping Assistant", "City": "Los Angeles", "State": "California", "Email": "robinc@dx-email.com", "Skype": "robinc_DX_skype", "Mobile_Phone": "(818) 555-0942", "Birth_Date": "1981-06-12", "Hire_Date": "2012-09-01" }, { "ID": 17, "Head_ID": 9, "Full_Name": "Kelly Rodriguez", "Prefix": "Ms.", "Title": "Support Assistant", "City": "Boise", "State": "Idaho", "Email": "kellyr@dx-email.com", "Skype": "kellyr_DX_skype", "Mobile_Phone": "(818) 555-9248", "Birth_Date": "1988-05-11", "Hire_Date": "2012-10-13" }, { "ID": 18, "Head_ID": 9, "Full_Name": "James Anderson", "Prefix": "Mr.", "Title": "Support Assistant", "City": "Atlanta", "State": "Georgia", "Email": "jamesa@dx-email.com", "Skype": "jamesa_DX_skype", "Mobile_Phone": "(323) 555-4702", "Birth_Date": "1987-01-29", "Hire_Date": "2012-10-18" }, { "ID": 19, "Head_ID": 9, "Full_Name": "Antony Remmen", "Prefix": "Mr.", "Title": "Support Assistant", "City": "Boise", "State": "Idaho", "Email": "anthonyr@dx-email.com", "Skype": "anthonyr_DX_skype", "Mobile_Phone": "(310) 555-6625", "Birth_Date": "1986-02-19", "Hire_Date": "2013-01-19" }, { "ID": 20, "Head_ID": 8, "Full_Name": "Olivia Peyton", "Prefix": "Mrs.", "Title": "Sales Assistant", "City": "Atlanta", "State": "Georgia", "Email": "oliviap@dx-email.com", "Skype": "oliviap_DX_skype", "Mobile_Phone": "(310) 555-2728", "Birth_Date": "1981-06-03", "Hire_Date": "2012-05-14" }, { "ID": 21, "Head_ID": 6, "Full_Name": "Taylor Riley", "Prefix": "Mr.", "Title": "Network Admin", "City": "San Jose", "State": "California", "Email": "taylorr@dx-email.com", "Skype": "taylorr_DX_skype", "Mobile_Phone": "(310) 555-7276", "Birth_Date": "1982-08-14", "Hire_Date": "2012-04-14" }, { "ID": 22, "Head_ID": 6, "Full_Name": "Amelia Harper", "Prefix": "Mrs.", "Title": "Network Admin", "City": "Los Angeles", "State": "California", "Email": "ameliah@dx-email.com", "Skype": "ameliah_DX_skype", "Mobile_Phone": "(213) 555-4276", "Birth_Date": "1983-11-19", "Hire_Date": "2011-02-10" }, { "ID": 23, "Head_ID": 6, "Full_Name": "Wally Hobbs", "Prefix": "Mr.", "Title": "Programmer", "City": "Chatsworth", "State": "California", "Email": "wallyh@dx-email.com", "Skype": "wallyh_DX_skype", "Mobile_Phone": "(818) 555-8872", "Birth_Date": "1984-12-24", "Hire_Date": "2011-02-17" }, { "ID": 24, "Head_ID": 6, "Full_Name": "Brad Jameson", "Prefix": "Mr.", "Title": "Programmer", "City": "San Fernando", "State": "California", "Email": "bradleyj@dx-email.com", "Skype": "bradleyj_DX_skype", "Mobile_Phone": "(818) 555-4646", "Birth_Date": "1988-10-12", "Hire_Date": "2011-03-02" }, { "ID": 25, "Head_ID": 6, "Full_Name": "Karen Goodson", "Prefix": "Miss", "Title": "Programmer", "City": "South Pasadena", "State": "California", "Email": "kareng@dx-email.com", "Skype": "kareng_DX_skype", "Mobile_Phone": "(626) 555-0908", "Birth_Date": "1987-04-26", "Hire_Date": "2011-03-14" }, { "ID": 26, "Head_ID": 5, "Full_Name": "Marcus Orbison", "Prefix": "Mr.", "Title": "Travel Coordinator", "City": "Los Angeles", "State": "California", "Email": "marcuso@dx-email.com", "Skype": "marcuso_DX_skype", "Mobile_Phone": "(213) 555-7098", "Birth_Date": "1982-03-02", "Hire_Date": "2005-05-19" }, { "ID": 27, "Head_ID": 5, "Full_Name": "Sandy Bright", "Prefix": "Ms.", "Title": "Benefits Coordinator", "City": "Denver", "State": "Colorado", "Email": "sandrab@dx-email.com", "Skype": "sandrab_DX_skype", "Mobile_Phone": "(818) 555-0524", "Birth_Date": "1983-09-11", "Hire_Date": "2005-06-04" }, { "ID": 28, "Head_ID": 6, "Full_Name": "Morgan Kennedy", "Prefix": "Mrs.", "Title": "Graphic Designer", "City": "San Fernando Valley", "State": "California", "Email": "morgank@dx-email.com", "Skype": "morgank_DX_skype", "Mobile_Phone": "(818) 555-8238", "Birth_Date": "1984-07-17", "Hire_Date": "2012-01-11" }, { "ID": 29, "Head_ID": 28, "Full_Name": "Violet Bailey", "Prefix": "Ms.", "Title": "Jr Graphic Designer", "City": "La Canada", "State": "California", "Email": "violetb@dx-email.com", "Skype": "violetb_DX_skype", "Mobile_Phone": "(818) 555-2478", "Birth_Date": "1985-06-10", "Hire_Date": "2012-01-19" }, { "ID": 30, "Head_ID": 5, "Full_Name": "Ken Samuelson", "Prefix": "Dr.", "Title": "Ombudsman", "City": "St. Louis", "State": "Missouri", "Email": "kents@dx-email.com", "Skype": "kents_DX_skype", "Mobile_Phone": "(562) 555-9282", "Birth_Date": "1972-09-11", "Hire_Date": "2009-04-22" }];