@Override
protected String doRender(
List<ColumnData> cs, List<ModelData> rows, int startRow, int colCount, boolean stripe) {
if (rows.size() < 1) {
return "";
}
String groupField = getGroupField();
int colIndex = cm.findColumnIndex(groupField);
enableGrouping = groupField != null;
if (!enableGrouping || isUpdating) {
return super.doRender(cs, rows, startRow, colCount, stripe);
}
String gstyle = "width:" + getTotalWidth() + "px;";
String gidPrefix = grid.getId();
ColumnConfig cfg = cm.getColumn(colIndex);
String prefix = showGroupName ? cfg.getHeader() + ": " : "";
GroupColumnData curGroup = null;
String gid = null;
List<GroupColumnData> groups = new ArrayList<GroupColumnData>();
for (int j = 0; j < rows.size(); j++) {
ModelData model = (ModelData) rows.get(j);
int rowIndex = (j + startRow);
// the value for the group field
Object gvalue = model.get(groupField);
// the rendered group value
String g = getGroup(gvalue, model, rowIndex, colIndex, ds);
if (curGroup == null || !curGroup.group.equals(g)) {
gid = getGroupId(gidPrefix, groupField, g);
boolean isCollapsed = state.get(gid) != null ? !state.get(gid) : startCollapsed;
String gcls = isCollapsed ? "x-grid-group-collapsed" : "";
curGroup = new GroupColumnData();
curGroup.group = g;
curGroup.field = groupField;
curGroup.gvalue = gvalue;
curGroup.text = prefix + g;
curGroup.groupId = gid;
curGroup.startRow = rowIndex;
curGroup.style = gstyle;
curGroup.css = gcls;
curGroup.models.add(model);
groups.add(curGroup);
} else {
curGroup.models.add(model);
}
// model.set("_groupId", gid);
}
for (GroupColumnData group : groups) {
if (groupRenderer != null) {
String g = groupRenderer.render(group);
if (g == null || g.equals("")) {
g = " ";
}
group.group = g;
}
}
StringBuilder buf = new StringBuilder();
for (int i = 0, len = groups.size(); i < len; i++) {
GroupColumnData g = groups.get(i);
doGroupStart(buf, g, cs, colCount);
buf.append(super.doRender(cs, g.models, g.startRow, colCount, stripe));
doGroupEnd(buf, g, cs, colCount);
}
return buf.toString();
}
