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/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.snippets;
/*
* Tree example snippet: show results as a bar chart in tree
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.2
*/
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet232 {
public static void main(String [] args) {
final Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setText("Show results as a bar chart in Tree");
final Tree tree = new Tree(shell, SWT.BORDER);
tree.setHeaderVisible(true);
tree.setLinesVisible(true);
TreeColumn column1 = new TreeColumn(tree, SWT.NONE);
column1.setText("Bug Status");
column1.setWidth(100);
final TreeColumn column2 = new TreeColumn(tree, SWT.NONE);
column2.setText("Percent");
column2.setWidth(200);
String[] states = new String[]{"Resolved", "New", "Won't Fix", "Invalid"};
String[] teams = new String[] {"UI", "SWT", "OSGI"};
for (int i=0; i<teams.length; i++) {
TreeItem item = new TreeItem(tree, SWT.NONE);
item.setText(teams[i]);
for (int j = 0; j < states.length; j++) {
TreeItem subItem = new TreeItem(item, SWT.NONE);
subItem.setText(states[j]);
}
}
/*
* NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
* Therefore, it is critical for performance that these methods be
* as efficient as possible.
*/
tree.addListener(SWT.PaintItem, new Listener() {
int[] percents = new int[] {50, 30, 5, 15};
public void handleEvent(Event event) {
if (event.index == 1) {
TreeItem item = (TreeItem)event.item;
TreeItem parent = item.getParentItem();
if (parent != null) {
GC gc = event.gc;
int index = parent.indexOf(item);
int percent = percents[index];
Color foreground = gc.getForeground();
Color background = gc.getBackground();
gc.setForeground(display.getSystemColor(SWT.COLOR_RED));
gc.setBackground(display.getSystemColor(SWT.COLOR_YELLOW));
int width = (column2.getWidth() - 1) * percent / 100;
gc.fillGradientRectangle(event.x, event.y, width, event.height, true);
Rectangle rect2 = new Rectangle(event.x, event.y, width-1, event.height-1);
gc.drawRectangle(rect2);
gc.setForeground(display.getSystemColor(SWT.COLOR_LIST_FOREGROUND));
String text = percent+"%";
Point size = event.gc.textExtent(text);
int offset = Math.max(0, (event.height - size.y) / 2);
gc.drawText(text, event.x+2, event.y+offset, true);
gc.setForeground(background);
gc.setBackground(foreground);
}
}
}
});
shell.pack();
shell.open();
while(!shell.isDisposed()) {
if(!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
}
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