snippet003tablelabelprovider.java

来自「对于可视的桌面开发系统的一些详细的设计资料」· Java 代码 · 共 160 行

/*******************************************************************************
 * 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 org.eclipse.jface.snippets.viewers;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
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.TableColumn;

/**
 * Example usage of ITableLabelProvider using images and labels
 * 
 * @author Tom Schindl <[e-mail]>
 *
 */
public class Snippet003TableLabelProvider {
	private static Image[] images;
	
	private class MyContentProvider implements IStructuredContentProvider {

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

		/* (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) {
			
		}
		
	}
	
	public class MyModel {
		public int counter;
		
		public MyModel(int counter) {
			this.counter = counter;
		}
		
		public String toString() {
			return "Item " + this.counter;
		}
	}
	
	public class MyLabelProvider extends LabelProvider implements ITableLabelProvider {

		public Image getColumnImage(Object element, int columnIndex) {
			if( columnIndex == 1 ) {
				return images[((MyModel)element).counter%4];
			}
			
			return null;
		}

		public String getColumnText(Object element, int columnIndex) {
			return "Column " + columnIndex + " => " + element.toString();
		}
		
	}
	
	private static Image createImage(Display display, int red, int green, int blue) {
		Color color = new Color(display,red,green,blue);
		Image image = new Image(display,10,10);
		GC gc = new GC(image);
		gc.setBackground(color);
		gc.fillRectangle(0, 0, 10, 10);
		gc.dispose();
		
		return image;
	}
	
	public Snippet003TableLabelProvider(Shell shell) {
		final TableViewer v = new TableViewer(shell,SWT.BORDER|SWT.FULL_SELECTION);
		v.setLabelProvider(new MyLabelProvider());
		v.setContentProvider(new MyContentProvider());
		
		TableColumn column = new TableColumn(v.getTable(),SWT.NONE);
		column.setWidth(200);
		column.setText("Column 1");
		
		column = new TableColumn(v.getTable(),SWT.NONE);
		column.setWidth(200);
		column.setText("Column 2");
		
		MyModel[] model = createModel();
		v.setInput(model);
		v.getTable().setLinesVisible(true);
		v.getTable().setHeaderVisible(true);
	}
	
	private MyModel[] createModel() {
		MyModel[] elements = new MyModel[10];
		
		for( int i = 0; i < 10; i++ ) {
			elements[i] = new MyModel(i);
		}
		
		return elements;
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Display display = new Display ();
		
		images = new Image[4];
		images[0] = createImage(display,0,0,255);
		images[1] = createImage(display,0,255,255);
		images[2] = createImage(display,0,255,0);
		images[3] = createImage(display,255,0,255);
		
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		new Snippet003TableLabelProvider(shell);
		shell.open ();
		
		while (!shell.isDisposed ()) {
			if (!display.readAndDispatch ()) display.sleep ();
		}
		
		for( int i = 0; i < images.length; i++ ) {
			images[i].dispose();
		}
		
		display.dispose ();
		
	}

}