GWT CELLTABLE：如何在celltable标头上设置列降序图标？

Question

How to set columns descending icon ie DESC icon on celltable header ?

On celltable loading.. I want to set sorting order to column ie previously sorted column/sorting order by user (In last login , before logout)

I tried following way table.getColumnSortList().push(testColumn); ie setting column ascending to true with ASC Icon on top of header.It works fine

Now I want to set column in descending ie DESC icon on top header ? How to do it ?

Any help or guidance in this matter would be appreciated

Answer 1

When you call table.getColumnSortList().push(testColumn) if no sort info is set on the column it sets the sort to ascending. If you call it another time it reverses the sort order.

// Show the descending sort icon on a column.
ColumnSortInfo sortInfo = table.getColumnSortList().push(testColumn);
if (sortInfo.isAscending()) {
    table.getColumnSortList().push(testColumn);
}

To set the sort icon according to state saved in variable sortOrder:

// Assuming sortedOrder = true means ascending
// and sortedOrder = false means descending
ColumnSortInfo sortInfo = table.getColumnSortList().push(testColumn);
if (sortedOrder && !sortInfo.isAscending()) {
    table.getColumnSortList().push(testColumn);
}
else if (!sortedOrder && sortInfo.isAscending()) {
    table.getColumnSortList().push(testColumn);
}