Ch8ListComposite.java Source code

Introduction

Here is the source code for Ch8ListComposite.java

Source

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;

public class Ch8ListComposite extends Composite {
    public Ch8ListComposite(Composite parent) {
        super(parent, SWT.NULL);
        populateControl();
    }

    protected void populateControl() {
        FillLayout compositeLayout = new FillLayout();
        setLayout(compositeLayout);

        int[] styles = { SWT.SINGLE, SWT.MULTI };

        for (int style = 0; style < styles.length; style++) {
            createListViewer(styles[style]);
        }
    }

    private void createListViewer(int style) {
        ListViewer viewer = new ListViewer(this, style);

        viewer.setLabelProvider(new LabelProvider() {
            public String getText(Object element) {
                return ((ListItem) element).name;
            }
        });

        viewer.addFilter(new ViewerFilter() {
            public boolean select(Viewer viewer, Object parent, Object element) {
                return ((ListItem) element).value % 2 == 0;
            }
        });

        viewer.setSorter(new ViewerSorter() {
            public int compare(Viewer viewer, Object obj1, Object obj2) {
                return ((ListItem) obj2).value - ((ListItem) obj1).value;
            }
        });

        viewer.setContentProvider(new IStructuredContentProvider() {

            public Object[] getElements(Object inputElement) {
                return ((List) inputElement).toArray();
            }

            public void dispose() {
            }

            public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
            }
        });

        List input = new ArrayList();
        for (int i = 0; i < 20; i++) {
            input.add(new ListItem("item " + i, i));
        }

        viewer.setInput(input);
    }

}

class ListItem {
    public String name;

    public int value;

    public ListItem(String n, int v) {
        name = n;
        value = v;
    }
}