Kendo treelist - trying to set a column template - kendo-ui

Question

I'm working with a Kendo treelist widget, and disappointed to see there's no rowTemplate option as there is on the Kendo grid.
I see a columnTemplate option (i.e. http://docs.telerik.com/kendo-ui/api/javascript/ui/treelist#configuration-columns.template ), but this will affect the entire column.
However, I need to drill into each cell value and set a css color property based on a ratio ( i.e. If value/benchmark < .2, assign <span style='color:red;'> , but my color value is dynamic.
There's a dataBound: and dataBinding: event on the treelist, but I'm still trying to figure out how to intercept each cell value and set the color once I've done my calculation.
var treeOptions = {
dataSource: ds,
columns: colDefs,
selectable: true,
scrollable: true,
resizable: true,
reorderable: true,
height: 320,
change: function (e) {
// push selected dataItem
var selectedRow = this.select();
var row = this.dataItem(selectedRow);
},
dataBound: function (e) {
console.log("dataBinding");
var ds = e.sender.dataSource.data();
var rows = e.sender.table.find("tr");
}
};
and this is where I'm building out the `colDefs' object (column definitions):
function parseHeatMapColumns(data, dimId) {
// Creates the Column Headers of the heatmap treelist.
// typeId=0 is 1st Dimension; typeId=1 is 2nd Dimension
var column = [];
column.push({
"field": "field0",
"title": "Dimension",
headerAttributes: { style: "font-weight:" + 'bold' + ";" },
attributes : { style: "font-weight: bold;" }
});
var colIdx = 1; // start at column 1 to build col headers for the 2nd dimension grouping
_.each(data, function (item) {
if (item.typeId == dimId) {
// Dimension values are duplicated, so push unique values (i.e. trade types may have dupes, whereas a BkgLocation may not).
var found = _.find(column, { field0: item.field0 });
if (found == undefined) {
column.push({
field: "field2",
title: item.field0,
headerAttributes: {
style: "font-weight:" + 'bold'
}
,template: "<span style='color:red;'>#: field2 #</span>"
});
colIdx++;
}
}
});
return column;
}
**** UPDATE ****
In order to embed some logic within the template :
function configureHeatMapColumnDefs(jsonData, cols, model) {
var colDef = '';
var dimId = 0;
var colorProp;
var columns = kendoGridService.parseHeatMapColumns(jsonData, dimId);
// iterate columns and set color property; NB: columns[0] is the left-most "Dimension" column, so we start from i=1.
for (var i = 1; i <= columns.length-1; i++) {
columns[i]['template'] = function (data) {
var color = 'black';
if (data.field2 < 1000) {
color = 'red';
}
else if (data.field2 < 5000) {
color = 'green';
}
return "<span style='color:" + color + ";'>" + data.field2 + "</span>";
};
}
return columns;
}
Advice is appreciated.
Thanks,
Bob

Answer 1

In the databound event you can iterate through the rows. For each row you can get the dataItem associated with it using the dataitem() method (http://docs.telerik.com/kendo-ui/api/javascript/ui/treelist#methods-dataItem)
Once you have the dataitem, calculate your ration and if the row meets the criteria for color, change the cell DOM element:
dataBound: function (e) {
var that = e.sender;
var rows = e.sender.table.find("tr");
rows.each(function(idx, row){
var dataItem = that.dataItem(row);
var ageCell = $(row).find("td").eq(2);
if (dataItem.Age > 30) {
//mark in red
var ageText = ageCell.text();
ageCell.html('<span style="color:red;">' + ageText + '</span>');
}
}
DEMO
UPDATE: you can also do this with a template:
$("#treelist").kendoTreeList({
dataSource: dataSource,
height: 540,
selectable: true,
columns: [
{ field: "Position"},
{ field: "Name" },
{ field: "Age",
template: "# if ( data.Age > 30 ) { #<span style='color:red;'> #= data.Age # </span> #}else{# #= data.Age # #}#"
}
],
});
DEMO