Example usage for org.eclipse.swt.widgets Tree setSortDirection

Introduction

In this page you can find the example usage for org.eclipse.swt.widgets Tree setSortDirection.

Prototype

public void setSortDirection(int direction) 

Source Link

Document

Sets the direction of the sort indicator for the receiver.

Usage

From source file:org.eclipse.swt.examples.controlexample.TreeTab.java

void resetSortState(final Tree tree) {
    tree.setSortDirection(SWT.NONE);
    TreeColumn[] columns = tree.getColumns();
    for (TreeColumn column : columns) {
        SelectionListener listener = (SelectionListener) column.getData("SortListener"); //$NON-NLS-1$
        if (listener != null)
            column.removeSelectionListener(listener);
    }/*from w  w  w. j  av  a 2 s . c  o m*/
}

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From source file:org.eclipse.swt.examples.controlexample.TreeTab.java

/**
 * Sets the initial sort indicator state and adds a listener
 * to cycle through sort states and columns.
 *//*from  ww  w .ja  v a2s . c o m*/
void initializeSortState(final Tree tree) {
    /* Reset to known state: 'down' on column 0. */
    tree.setSortDirection(SWT.DOWN);
    TreeColumn[] columns = tree.getColumns();
    for (int i = 0; i < columns.length; i++) {
        TreeColumn column = columns[i];
        if (i == 0)
            tree.setSortColumn(column);
        SelectionListener listener = widgetSelectedAdapter(e -> {
            int sortDirection = SWT.DOWN;
            if (e.widget == tree.getSortColumn()) {
                /* If the sort column hasn't changed, cycle down -> up -> none. */
                switch (tree.getSortDirection()) {
                case SWT.DOWN:
                    sortDirection = SWT.UP;
                    break;
                case SWT.UP:
                    sortDirection = SWT.NONE;
                    break;
                }
            } else {
                tree.setSortColumn((TreeColumn) e.widget);
            }
            tree.setSortDirection(sortDirection);
        });
        column.addSelectionListener(listener);
        column.setData("SortListener", listener); //$NON-NLS-1$
    }
}

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