How do you center align a checkbox cell in a GXT grid column - gxt

Question

my code:
List<ColumnConfig<Reminder, ?>> ccs = new LinkedList<ColumnConfig<Reminder, ?>>();
CheckBoxCell cbc = new CheckBoxCell();
ColumnConfig<Reminder,Boolean> applicableColumn = new ColumnConfig<Reminder,Boolean>(properties.applicable(),100,"Applicable");
applicableColumn.setCell(cbc);
applicableColumn.setAlignment(HasHorizontalAlignment.ALIGN_CENTER);
This does not work.

Answer 1

I realize that this answer is probably too late for your purposes, but it may help someone looking for the same question. Here's the code that I use:
private void centerCheckBox(final ColumnConfig<Pet, ?> columnConfig) {
final int leftPadding = (columnConfig.getWidth() - 12) / 2;
final String styles = "padding: 3px 0px 0px " + leftPadding + "px;";
final SafeStyles textStyles = SafeStylesUtils.fromTrustedString(styles);
columnConfig.setColumnTextStyle(textStyles);
}
In addition to calling this method for each checkbox after the ColumnConfig is created I also call it for each checkbox column in the ColumnWidthChange event handler (the event handler is added to the ColumnModel). Here's my code for the column width change handler (note: I add each checkbox column config to a set when I create the ColumnConfig instances):
columnModel.addColumnWidthChangeHandler(new ColumnWidthChangeHandler() {
#Override
public void onColumnWidthChange(final ColumnWidthChangeEvent event) {
final ColumnConfig<Pet, ?> petColumnConfig = columnConfigList.get(event.getIndex());
if (_checkBoxSet.contains(petColumnConfig)) {
centerCheckBox(petColumnConfig);
_grid.getView().refresh(true);
}
}
});