GWT CellTable Cells readOnly/disabled/non-editable - gwt

Question

I want to make that some cells of the rows can be non-editable.
by now my solution is when i create the columns, if one is readOnly, y make a TextCell, if not, i go with the default Cell wich can be EditTextCell,DatePickerCell,etc.
The problem with this is that i can't make some rows readOnly and others not. Or they are ALL the fields readOnly or they are not.
How can i do to make this for example
TABLE:
Data1 | Data2 | Data3
--------------------------------------
readOnly | non-readOnly | readOnly
readOnly | readOnly | non-readOnly
when i mean "readOnly" it can be "enabled" or make it a "TextCell"
celda = new TextInputCell();
Column<ObjetoDato, String> columna = new Column<ObjetoDato, String>(celda) {
#Override
public String getValue(ObjetoDato object) {
if(actual.getValorDefault()!=null && object.getValor(actual.getNombreCampo()).isEmpty()){
object.setValor(actual.getNombreCampo(), actual.getValorDefault());
return actual.getValorDefault();
}
return object.getValor(actual.getNombreCampo());
}
};
tabla.agregarColumna(columna, actual.getCaption());
columna.setFieldUpdater(new FieldUpdater<ObjetoDato, String>() {
#Override
public void update(int index, ObjetoDato object, String value) {
object.setValor(actual.getNombreCampo(), value);
new Scripter(object,actual.getComportamiento(),true);
tabla.actualizar();
Sistema.get().getIG().actualizarTotales();
}
});
I tried creating my cutom cell already and replacing the TextImputCell, but the methods never trigger
celda = new FabriCel();
and
public class FabriCel extends TextInputCell {
private String campo;
public FabriCel(String campo){
this.campo=campo;
}
#Override
public void onBrowserEvent(Context context, Element parent, String value, NativeEvent event, ValueUpdater<String> valueUpdater){
Boolean editable = false;///get it from your model
if(editable != null && !editable){
event.preventDefault();
}else{
super.onBrowserEvent(context, parent, value, event, valueUpdater);
}
}
Also this
#Override
public void render(com.google.gwt.cell.client.Cell.Context context, String value, SafeHtmlBuilder sb) {
Boolean editable = false;///get it from your model
if(editable){
Log.log();
sb.appendHtmlConstant("<div contentEditable='false'>" +value+"</div>");
}else{
Log.log("No entra");
super.render(context, value, sb);
}
}
Thanks!

Answer 1

You have to create one custom cell. In that, you have tell runtime like it should be readonly or no-readonly. just example.
private class CustomCell extends EditTextCell {
public void render(com.google.gwt.cell.client.Cell.Context context,
String value, SafeHtmlBuilder sb) {
Data data=context.getKey();
if(data.isReadOnly()){
sb.appendHtmlConstant("<div contentEditable='false'
unselectable='false' >" +value+"</div>");
}else{
super.render(context, value, sb);
}
}
}
In given bean, there is some condition which says readonly or no-readonly.
And create column like
Column<Data, String> nameColumn = new Column<Data, String>(new CustomCell()) {
#Override
public String getValue(Data object) {
return object.getName();
}
};

Answer 2

A way to do this is to override the onBrowserEvent event of your Editable Cells and consume the event if the cell is not editable.
final EditTextCell cell = new EditTextCell(renderer)
{
#Override
public void onBrowserEvent(Context context, Element parent, String value, NativeEvent event, ValueUpdater<String> valueUpdater)
{
Boolean editable = false;///get it from your model
if(editable != null && !editable)
{
event.preventDefault();
}
else
{
super.onBrowserEvent(context, parent, value, event, valueUpdater);
}
}
}

Answer 3

I had the same need; and tested out various combinations of overriding render, isEditing, resetFocus, and edit on EditTextCell (I didn't try the onBrowserEvent solution).
When I only overrode render (to show an HTML value if non-editable); I got errors resetting focus (as discussed here). This continued even if I overrode resetFocus. When I only override isEditing, the cell would flash to editing when clicked, and then flash back. What worked perfectly was overriding edit. I triggered based on adding a tag to the value passed in by Column.getValue, you can trigger however you like, but it turned out to be as simple as:
private static class LockableEditTextCell extends EditTextCell {
#Override
protected void edit(Context context, Element parent, java.lang.String value) {
if (!value.startsWith(LOCKED_CELL_VALUE)) {
super.edit(context, parent, value);
}
}
}