/*******************************************************************************
* Copyright (c) 2000, 2007 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;
/*
* Table example snippet: draw multiple lines of text in a table item
*
* For a detailed explanation of this snippet see
* http://www.eclipse.org/articles/Article-CustomDrawingTableAndTreeItems/customDraw.htm#_example6
*
* 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.widgets.*;
public class Snippet231 {
public static void main(String [] args) {
final int COLUMN_COUNT = 4;
final int ITEM_COUNT = 8;
final int TEXT_MARGIN = 3;
Display display = new Display();
Shell shell = new Shell(display);
final Table table = new Table(shell, SWT.FULL_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
for (int i = 0; i < COLUMN_COUNT; i++) {
new TableColumn(table, SWT.NONE);
}
for (int i = 0; i < ITEM_COUNT; i++) {
TableItem item = new TableItem(table, SWT.NONE);
for (int j = 0; j < COLUMN_COUNT; j++) {
String string = "item " + i + " col " + j;
if ((i + j) % 3 == 1) {
string +="\nnew line1";
}
if ((i + j) % 3 == 2) {
string +="\nnew line1\nnew line2";
}
item.setText(j, string);
}
}
/*
* 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.MeasureItem, new Listener() {
@Override
public void handleEvent(Event event) {
TableItem item = (TableItem)event.item;
String text = item.getText(event.index);
Point size = event.gc.textExtent(text);
event.width = size.x + 2 * TEXT_MARGIN;
event.height = Math.max(event.height, size.y + TEXT_MARGIN);
}
});
table.addListener(SWT.EraseItem, new Listener() {
@Override
public void handleEvent(Event event) {
event.detail &= ~SWT.FOREGROUND;
}
});
table.addListener(SWT.PaintItem, new Listener() {
@Override
public void handleEvent(Event event) {
TableItem item = (TableItem)event.item;
String text = item.getText(event.index);
/* center column 1 vertically */
int yOffset = 0;
if (event.index == 1) {
Point size = event.gc.textExtent(text);
yOffset = Math.max(0, (event.height - size.y) / 2);
}
event.gc.drawText(text, event.x + TEXT_MARGIN, event.y + yOffset, true);
}
});
for (int i = 0; i < COLUMN_COUNT; i++) {
table.getColumn(i).pack();
}
table.pack();
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
}