Question

I am trying to display some content in Cell of TableViewer component. It displays almost every character except tab (\t) character. It looks like it ignores \t character. Any one know any fix for this?

For workaround to this issue, I tried replacing \t with few space characters and it looks like behavior of Tab character. But I wan’t to know why ‘\t’ is not properly displayed in TableViewer.

Any suggestion is appreciated.
Thanks.

Answer 1

You can use Textlayout and set the size of the tabs in pixelsusing setTabs().Here is an example:

package de.abas.erp.wb.base.tools.identifiersearchview;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.TextLayout;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;

public class TabSnippet {

public static void main(final String [] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
        shell.setText("Table:\t\t Change style \t multiple times in cell");
    shell.setLayout(new FillLayout());
    final Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION);
    table.setLinesVisible(true);
    for(int i = 0; i < 10; i++) {
        new TableItem(table, SWT.NONE);
    }
    final TextLayout textLayout = new TextLayout(display);
        textLayout.setText("SWT:\t Standard \t Widget \t Toolkit");
        textLayout.setTabs(new int[] { 100 });

        /*
         * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
         * Therefore, it is critical for performance that these methods be as
         * efficient as possible.
         */
        table.addListener(SWT.PaintItem, new Listener() {
            @Override
            public void handleEvent(final Event event) {
                textLayout.draw(event.gc, event.x, event.y);
            }
        });
        final Rectangle textLayoutBounds = textLayout.getBounds();
        table.addListener(SWT.MeasureItem, new Listener() {
            @Override
            public void handleEvent(final Event e) {
                e.width = textLayoutBounds.width + 2;
                e.height = textLayoutBounds.height + 2;
            }
        });
    shell.setSize(400, 200);
    shell.open();
    while(!shell.isDisposed()) {
        if(!display.readAndDispatch()) {
            display.sleep();
        }
    }
    textLayout.dispose();
    display.dispose();
}
}