/**
* Returns the 0 based index of the column at {@code pt}. The code can handle re-ordered columns.
* The index refers to the original ordering (as used by SWT API).
*
* <p>Will return -1 if no column could be computed -- this is the case when all columns are
* resized to have width 0.
*/
private int findColumn(final Grid grid, final Point pt) {
int width = 0;
final int[] colOrder = grid.getColumnOrder();
// compute the current column ordering
final GridColumn[] columns = new GridColumn[colOrder.length];
for (int i = 0; i < colOrder.length; i++) {
final int idx = colOrder[i];
columns[i] = grid.getColumn(idx);
}
// find the column under Point pt\
for (final GridColumn col : columns) {
final int colWidth = col.getWidth();
if (width < pt.x && pt.x < width + colWidth) {
return grid.indexOf(col);
}
width += colWidth;
}
return -1;
}
