Examples with ListHandler org.gwtproject.user.cellview.client.ColumnSortEvent.ListHandler used on opensource projects

Example 1 with ListHandler

use of org.gwtproject.user.cellview.client.ColumnSortEvent.ListHandler in project gwtproject by treblereel.

the class ColumnSortEventTest method testListHandler.

public void testListHandler() {
    // Create some unsorted values.
    List<String> values = new ArrayList<String>();
    values.add("b");
    values.add("a");
    values.add("c");
    // Create a handler for the list of values.
    ListHandler<String> handler = new ListHandler<String>(values);
    IdentityColumn<String> col0 = new IdentityColumn<String>(new TextCell());
    Comparator<String> col0Comparator = new Comparator<String>() {

        @Override
        public int compare(String o1, String o2) {
            return o1.compareTo(o2);
        }
    };
    handler.setComparator(col0, col0Comparator);
    IdentityColumn<String> col1 = new IdentityColumn<String>(new TextCell());
    handler.setComparator(col1, null);
    // Sort ascending.
    ColumnSortList sortList = new ColumnSortList();
    sortList.push(col0);
    handler.onColumnSort(new ColumnSortEvent(sortList));
    assertEquals("a", values.get(0));
    assertEquals("b", values.get(1));
    assertEquals("c", values.get(2));
    // Sort descending.
    // Switches sort to descending.
    sortList.push(col0);
    handler.onColumnSort(new ColumnSortEvent(sortList));
    assertEquals("c", values.get(0));
    assertEquals("b", values.get(1));
    assertEquals("a", values.get(2));
    // Null comparator.
    sortList.push(col1);
    assertEquals("c", values.get(0));
    assertEquals("b", values.get(1));
    assertEquals("a", values.get(2));
    // Retrieve the comparators.
    assertEquals(col0Comparator, handler.getComparator(col0));
    assertNull(handler.getComparator(col1));
    assertNull(handler.getComparator(new IdentityColumn<String>(new TextCell())));
    // Create some new unsorted values.
    List<String> newValues = new ArrayList<String>();
    newValues.add("e");
    newValues.add("d");
    newValues.add("f");
    // Update the handler to be for the new list of values.
    handler.setList(newValues);
    // Sort the new list in ascending order.
    sortList.push(col0);
    handler.onColumnSort(new ColumnSortEvent(sortList));
    // The new values, sorted in ascending order.
    assertEquals("d", newValues.get(0));
    assertEquals("e", newValues.get(1));
    assertEquals("f", newValues.get(2));
    // The old values, still sorted in descending order.
    assertEquals("c", values.get(0));
    assertEquals("b", values.get(1));
    assertEquals("a", values.get(2));
}