Double click handler to flextable in GWT 2.3 - gwt

Question

I want to add double click handler to FlexTable in GWT.
I used below code :
flexTable.addDoubleClickHandler(new DoubleClickHandler() {
#Override
public void onDoubleClick(DoubleClickEvent event) {
}
});
But how can i get row index.
Please suggest me.

Answer 1

Sadly there is no built-in method to retrieve a cell from a double-click event in FlexTable. It can be implemented in a few lines though. This is how I did it.
Create a subclass of FlexTable with the following code:
public class DoubleClickTable extends FlexTable {
class MyCell extends Cell {
protected MyCell(int rowIndex, int cellIndex) {
super(rowIndex, cellIndex);
}
}
public Cell getCellForEvent(MouseEvent<? extends EventHandler> event) {
Element td = getEventTargetCell(Event.as(event.getNativeEvent()));
if (td == null) {
return null;
}
int row = TableRowElement.as(td.getParentElement()).getSectionRowIndex();
int column = TableCellElement.as(td).getCellIndex();
return new MyCell(row, column);
}
}
Then in the DoubleClickHandler call getCellForEvent() to retrieve the clicked cell:
flexTable.addDoubleClickHandler(new DoubleClickHandler() {
#Override
public void onDoubleClick(DoubleClickEvent event) {
Cell cell = flexTable.getCellForEvent(event);
GWT.log("Row index: " + cell.getRowIndex());
}
});
Implementation details: method getCellForEvent() is a copy of the method with the same name in class HTMLTable (the parent class of FlexTable), except that it has a different signature for the parameters. The MyCell class is a workaround to be able to call the Cell constructor, which is protected.