Mega Code Archive
Demonstrates the MessageBox class
<![CDATA[
//Send questions, comments, bug reports, etc. to the authors:
//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* This class demonstrates the MessageBox class
*/
public class ShowMessageBox {
// Strings to show in the Icon dropdown
private static final String[] ICONS = { "SWT.ICON_ERROR",
"SWT.ICON_INFORMATION", "SWT.ICON_QUESTION", "SWT.ICON_WARNING",
"SWT.ICON_WORKING"};
// Strings to show in the Buttons dropdown
private static final String[] BUTTONS = { "SWT.OK", "SWT.OK | SWT.CANCEL",
"SWT.YES | SWT.NO", "SWT.YES | SWT.NO | SWT.CANCEL",
"SWT.RETRY | SWT.CANCEL", "SWT.ABORT | SWT.RETRY | SWT.IGNORE"};
/**
* Runs the application
*/
public void run() {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Show Message Box");
createContents(shell);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
/**
* Creates the main window's contents
*
* @param shell the parent shell
*/
private void createContents(final Shell shell) {
shell.setLayout(new GridLayout(2, false));
// Create the dropdown to allow icon selection
new Label(shell, SWT.NONE).setText("Icon:");
final Combo icons = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
for (int i = 0, n = ICONS.length; i < n; i++)
icons.add(ICONS[i]);
icons.select(0);
// Create the dropdown to allow button selection
new Label(shell, SWT.NONE).setText("Buttons:");
final Combo buttons = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
for (int i = 0, n = BUTTONS.length; i < n; i++)
buttons.add(BUTTONS[i]);
buttons.select(0);
// Create the entry field for the message
new Label(shell, SWT.NONE).setText("Message:");
final Text message = new Text(shell, SWT.BORDER);
message.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// Create the label to show the return from the open call
new Label(shell, SWT.NONE).setText("Return:");
final Label returnVal = new Label(shell, SWT.NONE);
returnVal.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// Create the button and event handler
// to display the message box
Button button = new Button(shell, SWT.PUSH);
button.setText("Show Message");
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
// Clear any previously returned value
returnVal.setText("");
// This will hold the style to pass to the MessageBox constructor
int style = 0;
// Determine which icon was selected and
// add it to the style
switch (icons.getSelectionIndex()) {
case 0:
style |= SWT.ICON_ERROR;
break;
case 1:
style |= SWT.ICON_INFORMATION;
break;
case 2:
style |= SWT.ICON_QUESTION;
break;
case 3:
style |= SWT.ICON_WARNING;
break;
case 4:
style |= SWT.ICON_WORKING;
break;
}
// Determine which set of buttons was selected
// and add it to the style
switch (buttons.getSelectionIndex()) {
case 0:
style |= SWT.OK;
break;
case 1:
style |= SWT.OK | SWT.CANCEL;
break;
case 2:
style |= SWT.YES | SWT.NO;
break;
case 3:
style |= SWT.YES | SWT.NO | SWT.CANCEL;
break;
case 4:
style |= SWT.RETRY | SWT.CANCEL;
break;
case 5:
style |= SWT.ABORT | SWT.RETRY | SWT.IGNORE;
break;
}
// Display the message box
MessageBox mb = new MessageBox(shell, style);
mb.setText("Message from SWT");
mb.setMessage(message.getText());
int val = mb.open();
String valString = "";
switch (val) // val contains the constant of the selected button
{
case SWT.OK:
valString = "SWT.OK";
break;
case SWT.CANCEL:
valString = "SWT.CANCEL";
break;
case SWT.YES:
valString = "SWT.YES";
break;
case SWT.NO:
valString = "SWT.NO";
break;
case SWT.RETRY:
valString = "SWT.RETRY";
break;
case SWT.ABORT:
valString = "SWT.ABORT";
break;
case SWT.IGNORE:
valString = "SWT.IGNORE";
break;
}
returnVal.setText(valString);
}
});
}
/**
* Application entry point
*
* @param args the command line arguments
*/
public static void main(String[] args) {
new ShowMessageBox().run();
}
}
]]>