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import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class MailDialog extends TitleAreaDialog {
// IDs for MailDialog buttons
// We use large integers because we don't want
// to conflict with system constants
public static final int OPEN = 9999;
public static final int DELETE = 9998;
// List widget
List list;
// Initial content of the list
String[] items;
// Selected items
String[] itemsToOpen;
/**
* Constructor for MailDialog.
*
* @param shell -
* Containing shell
* @param items -
* Mail messages passed to the dialog
*/
public MailDialog(Shell shell, String[] items) {
super(shell);
this.items = items;
}
/**
* @see org.eclipse.jface.window.Window#create() We complete the dialog with
* a title and a message
*/
public void create() {
super.create();
setTitle("Mail");
setMessage("You have mail! \n It could be vital for this evening...");
}
/**
* @see org.eclipse.jface.dialogs.Dialog#
* createDialogArea(org.eclipse.swt.widgets.Composite) Here we fill the
* center area of the dialog
*/
protected Control createDialogArea(Composite parent) {
// Create new composite as container
final Composite area = new Composite(parent, SWT.NULL);
// We use a grid layout and set the size of the margins
final GridLayout gridLayout = new GridLayout();
gridLayout.marginWidth = 15;
gridLayout.marginHeight = 10;
area.setLayout(gridLayout);
// Now we create the list widget
list = new List(area, SWT.BORDER | SWT.MULTI);
// We define a minimum width for the list
final GridData gridData = new GridData();
gridData.widthHint = 200;
list.setLayoutData(gridData);
// We add a SelectionListener
list.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
// When the selection changes, we re-validate the list
validate();
}
});
// We add the initial mail messages to the list
for (int i = 0; i < items.length; i++) {
list.add(items[i]);
}
return area;
}
private void validate() {
// We select the number of selected list entries
boolean selected = (list.getSelectionCount() > 0);
// We enable/disable the Open and Delete buttons
getButton(OPEN).setEnabled(selected);
getButton(DELETE).setEnabled(selected);
if (!selected)
// If nothing was selected, we set an error message
setErrorMessage("Select at least one entry!");
else
// Otherwise we set the error message to null
// to show the intial content of the message area
setErrorMessage(null);
}
/**
* @see org.eclipse.jface.dialogs.Dialog#
* createButtonsForButtonBar(org.eclipse.swt.widgets.Composite) We
* replace the OK and Cancel buttons by our own creations We use the
* method createButton() (from Dialog), to create the new buttons
*/
protected void createButtonsForButtonBar(Composite parent) {
// Create Open button
Button openButton = createButton(parent, OPEN, "Open", true);
// Initially deactivate it
openButton.setEnabled(false);
// Add a SelectionListener
openButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
// Retrieve selected entries from list
itemsToOpen = list.getSelection();
// Set return code
setReturnCode(OPEN);
// Close dialog
close();
}
});
// Create Delete button
Button deleteButton = createButton(parent, DELETE, "Delete", false);
deleteButton.setEnabled(false);
// Add a SelectionListener
deleteButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
// Get the indices of the selected entries
int selectedItems[] = list.getSelectionIndices();
// Remove all these entries
list.remove(selectedItems);
// Now re-validate the list because it has changed
validate();
}
});
// Create Cancel button
Button cancelButton = createButton(parent, CANCEL, "Cancel", false);
// Add a SelectionListener
cancelButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
setReturnCode(CANCEL);
close();
}
});
}
/**
* Method getItemsToOpen.
*
* @return String[] - the selected items
*/
public String[] getItemsToOpen() {
return itemsToOpen;
}
}
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