jface.viewers.Snippet014TreeViewerNoMandatoryLabelProvider.java Source code

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Here is the source code for jface.viewers.Snippet014TreeViewerNoMandatoryLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2006 Tom Schindl and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Tom Schindl - initial API and implementation
 *******************************************************************************/

package jface.viewers;

import java.util.ArrayList;

import org.eclipse.jface.resource.FontRegistry;
import org.eclipse.jface.viewers.ITableColorProvider;
import org.eclipse.jface.viewers.ITableFontProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TreeColumn;

/**
 * A simple TreeViewer to demonstrate usage
 * 
 * @author Tom Schindl <tom.schindl@bestsolution.at>
 * 
 */
public class Snippet014TreeViewerNoMandatoryLabelProvider {
    private class MyContentProvider implements ITreeContentProvider {

        /*
         * (non-Javadoc)
         * 
         * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
         */
        public Object[] getElements(Object inputElement) {
            return ((MyModel) inputElement).child.toArray();
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.eclipse.jface.viewers.IContentProvider#dispose()
         */
        public void dispose() {

        }

        /*
         * (non-Javadoc)
         * 
         * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer,
         *      java.lang.Object, java.lang.Object)
         */
        public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

        }

        /*
         * (non-Javadoc)
         * 
         * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
         */
        public Object[] getChildren(Object parentElement) {
            return getElements(parentElement);
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
         */
        public Object getParent(Object element) {
            if (element == null) {
                return null;
            }

            return ((MyModel) element).parent;
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
         */
        public boolean hasChildren(Object element) {
            return ((MyModel) element).child.size() > 0;
        }

    }

    public class MyModel {
        public MyModel parent;

        public ArrayList child = new ArrayList();

        public int counter;

        public MyModel(int counter, MyModel parent) {
            this.parent = parent;
            this.counter = counter;
        }

        public String toString() {
            String rv = "Item ";
            if (parent != null) {
                rv = parent.toString() + ".";
            }

            rv += counter;

            return rv;
        }
    }

    public class MyLabelProvider extends LabelProvider
            implements ITableLabelProvider, ITableFontProvider, ITableColorProvider {
        FontRegistry registry = new FontRegistry();

        public Image getColumnImage(Object element, int columnIndex) {
            return null;
        }

        public String getColumnText(Object element, int columnIndex) {
            return "Column " + columnIndex + " => " + element.toString();
        }

        public Font getFont(Object element, int columnIndex) {
            if (((MyModel) element).counter % 2 == 0) {
                return registry.getBold(Display.getCurrent().getSystemFont().getFontData()[0].getName());
            }
            return null;
        }

        public Color getBackground(Object element, int columnIndex) {
            if (((MyModel) element).counter % 2 == 0) {
                return Display.getCurrent().getSystemColor(SWT.COLOR_RED);
            }
            return null;
        }

        public Color getForeground(Object element, int columnIndex) {
            if (((MyModel) element).counter % 2 == 1) {
                return Display.getCurrent().getSystemColor(SWT.COLOR_RED);
            }
            return null;
        }

    }

    public Snippet014TreeViewerNoMandatoryLabelProvider(Shell shell) {
        final TreeViewer v = new TreeViewer(shell);

        TreeColumn column = new TreeColumn(v.getTree(), SWT.NONE);
        column.setWidth(200);
        column.setText("Column 1");

        column = new TreeColumn(v.getTree(), SWT.NONE);
        column.setWidth(200);
        column.setText("Column 2");

        v.setLabelProvider(new MyLabelProvider());
        v.setContentProvider(new MyContentProvider());
        v.setInput(createModel());
    }

    private MyModel createModel() {

        MyModel root = new MyModel(0, null);
        root.counter = 0;

        MyModel tmp;
        for (int i = 1; i < 10; i++) {
            tmp = new MyModel(i, root);
            root.child.add(tmp);
            for (int j = 1; j < i; j++) {
                tmp.child.add(new MyModel(j, tmp));
            }
        }

        return root;
    }

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());
        new Snippet014TreeViewerNoMandatoryLabelProvider(shell);
        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }

        display.dispose();
    }
}