Highlight row when the checkbox is true

I described in the answer one good way how you can implement the highlighting.

Version 4.3.2 of jqGrid has new feature – rowattr callback (see my original suggestion), which was introduced especially for cases like yours. It allows you to highlight some rows of grid during filling of the grid. To have the best performance advantage you should use gridview: true additionally. By the way I recommend you to use gridview: true in all jqGrids.

The usage of rowattr callback is very easy:

gridview: true,
rowattr: function (rd) {
    if (rd.GroupHeader === "1") { // verify that the testing is correct in your case
        return {"class": "myAltRowClass"};
    }
}

The CSS class myAltRowClass should define background color of highlighted rows.

The corresponding demo you can find here:

Because in your demo you need just highlight and not select the rows I didn’t used multiselect: true in my demo. In case of multiselect: true it works exactly in the same way.

At the end of my answer I would like to recommend you to use column templates. The feature will make your code shorter, more readable and easy to maintain. What you need to do is the following:

• you can include common or the most frequently used settings from column definitions in cmTemplete. In your case it could be

cmTemplate: {align: 'center', sortable: false, editable: true, width: 80}

• then you can define some variables which describe common properties which you use frequently in some columns. For example:

var myCheckboxTemplate = {formatter: 'checkbox', edittype: 'checkbox', type: 'select',
        editoptions: {value: "1:0"}},
    myTextareaTemplate = {edittype: "textarea",
        editoptions: {size: "30", maxlength: "30"}};

• after that you can use myCheckboxTemplate and myTextareaTemplate inside of colModel which will reduced in your case to the following

colModel: [
    {name: 'TypeID', index: 'TypeID', width: 350, hidden: true, edittype: "select",
        editoptions: {value: getTypeID()}, editrules: { edithidden: true}},
    {name: 'Order1', index: 'Order1', template: myTextareaTemplate},
    {name: 'Order2', index: 'Order2', template: myTextareaTemplate},
    {name: 'Order3', index: 'Order3', template: myTextareaTemplate},
    {name: 'Description', index: 'Description', width: 140, template: myTextareaTemplate},
    {name: 'Notes', index: 'Notes', width: 120, template: myTextareaTemplate},
    {name: 'Measure', index: 'Measure', template: myTextareaTemplate},
    {name: 'UnitPrice', index: 'UnitPrice', width: 100, editable: false, template: myTextareaTemplate},
    {name: 'Remarks', index: 'Remarks', width: 140, template: myTextareaTemplate},
    {name: 'UnitCost', index: 'UnitCost', width: 100, template: myTextareaTemplate},
    {name: 'Service', index: 'Service', width: 120, template: myTextareaTemplate},
    //If the GroupHeader is true the row background is yellow
    {name: 'GroupHeader', index: 'GroupHeader', width: 100, template: myCheckboxTemplate},
    {name: 'IsGroup', index: 'IsGroup', template: myCheckboxTemplate}
],
cmTemplate: {align: 'center', sortable: false, editable: true, width: 80},