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/*******************************************************************************
* Copyright (c) 2000, 2004 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;
/*
* Adding an accessible listener to provide state information
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import org.eclipse.swt.*;
import org.eclipse.swt.accessibility.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet162 {
final static String STATE = "CheckedIndices";
public static void main (String [] args) {
final Display display = new Display ();
Image checkedImage = getCheckedImage (display);
Image uncheckedImage = getUncheckedImage (display);
Shell shell = new Shell (display);
shell.setLayout (new FillLayout ());
final Table table = new Table (shell, SWT.BORDER);
TableColumn column1 = new TableColumn (table, SWT.NONE);
TableColumn column2 = new TableColumn (table, SWT.NONE);
TableColumn column3 = new TableColumn (table, SWT.NONE);
TableItem item1 = new TableItem (table, SWT.NONE);
item1.setText (new String [] {"first item", "a", "b"});
item1.setImage (1, uncheckedImage);
item1.setImage (2, uncheckedImage);
item1.setData (STATE, null);
TableItem item2 = new TableItem (table, SWT.NONE);
item2.setText (new String [] {"second item", "c", "d"});
item2.setImage (1, uncheckedImage);
item2.setImage (2, checkedImage);
item2.setData (STATE, new int [] {2});
TableItem item3 = new TableItem (table, SWT.NONE);
item3.setText (new String [] {"third", "e", "f"});
item3.setImage (1, checkedImage);
item3.setImage (2, checkedImage);
item3.setData (STATE, new int [] {1, 2});
column1.pack ();
column2.pack ();
column3.pack ();
Accessible accessible = table.getAccessible ();
accessible.addAccessibleListener (new AccessibleAdapter () {
public void getName (AccessibleEvent e) {
super.getName (e);
if (e.childID >= 0 && e.childID < table.getItemCount ()) {
TableItem item = table.getItem (e.childID);
Point pt = display.getCursorLocation ();
pt = display.map (null, table, pt);
for (int i = 0; i < table.getColumnCount (); i++) {
if (item.getBounds (i).contains (pt)) {
int [] data = (int []) item.getData (STATE);
boolean checked = false;
if (data != null) {
for (int j = 0; j < data.length; j++) {
if (data [j] == i) {
checked = true;
break;
}
}
}
e.result = item.getText (i) + " " + (checked ? "checked" : "unchecked");
break;
}
}
}
}
});
accessible.addAccessibleControlListener (new AccessibleControlAdapter () {
public void getState (AccessibleControlEvent e) {
super.getState (e);
if (e.childID >= 0 && e.childID < table.getItemCount ()) {
TableItem item = table.getItem (e.childID);
int [] data = (int []) item.getData (STATE);
if (data != null) {
Point pt = display.getCursorLocation ();
pt = display.map (null, table, pt);
for (int i = 0; i < data.length; i++) {
if (item.getBounds (data [i]).contains (pt)) {
e.detail |= ACC.STATE_CHECKED;
break;
}
}
}
}
}
});
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();
}
checkedImage.dispose ();
uncheckedImage.dispose ();
display.dispose ();
}
static Image getCheckedImage (Display display) {
Image image = new Image (display, 16, 16);
GC gc = new GC (image);
gc.setBackground (display.getSystemColor (SWT.COLOR_YELLOW));
gc.fillOval (0, 0, 16, 16);
gc.setForeground (display.getSystemColor (SWT.COLOR_DARK_GREEN));
gc.drawLine (0, 0, 16, 16);
gc.drawLine (16, 0, 0, 16);
gc.dispose ();
return image;
}
static Image getUncheckedImage (Display display) {
Image image = new Image (display, 16, 16);
GC gc = new GC (image);
gc.setBackground (display.getSystemColor (SWT.COLOR_YELLOW));
gc.fillOval (0, 0, 16, 16);
gc.dispose ();
return image;
}
}
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