private void createLWTGroup(Composite container) {
// data model
final LWT lwt = connection.getOptions().getLwt();
final Group group = new Group(container, SWT.NONE);
group.setText(Messages.OPT_TAB_GROUP_LWT);
// layout
FormLayout layout = new FormLayout();
layout.marginBottom = 10;
group.setLayout(layout);
GridData gd = new GridData(GridData.FILL_HORIZONTAL);
group.setLayoutData(gd);
// **********************************************
// Row: Topic + QoS + Retain
// **********************************************
// Topic - label
Label topicLabel = new Label(group, SWT.NONE);
FormData fd = new FormData();
fd.top = new FormAttachment(0, 10);
fd.left = new FormAttachment(0, 10);
topicLabel.setLayoutData(fd);
topicLabel.setText(Messages.OPT_TAB_GROUP_LWT_TOPIC);
// Topic - input
final Text topicText = new Text(group, SWT.BORDER);
fd = new FormData();
fd.top = new FormAttachment(topicLabel, 10, SWT.CENTER);
fd.left = new FormAttachment(topicLabel, 40);
fd.right = new FormAttachment(100, -4);
topicText.setLayoutData(fd);
// QoS - label
Label qosLabel = new Label(group, SWT.NONE);
fd = new FormData();
fd.top = new FormAttachment(topicLabel, 10);
fd.left = new FormAttachment(0, 10);
qosLabel.setLayoutData(fd);
qosLabel.setText(Messages.OPT_TAB_GROUP_LWT_QOS);
// QoS - selection
CCombo combo = new CCombo(group, SWT.BORDER);
List<String> qosList = new ArrayList<String>();
for (QoS qos : QoS.values()) {
qosList.add(qos.getLabel());
}
combo.setItems(qosList.toArray(new String[0]));
combo.setEditable(false);
combo.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
Display.getDefault()
.asyncExec(
new Runnable() {
@Override
public void run() {
// Note: need manually set (because NOT using databinding for combo)
CCombo combo = (CCombo) e.widget;
lwt.setQos(QoS.valueOf(combo.getSelectionIndex()));
}
});
}
});
// Note: need manually set (because NOT using databinding for combo)
combo.select(lwt.getQos().getValue());
fd = new FormData();
fd.top = new FormAttachment(qosLabel, 0, SWT.CENTER);
fd.left = new FormAttachment(topicText, 0, SWT.LEFT);
combo.setLayoutData(fd);
// Retained
Button retained = new Button(group, SWT.CHECK);
retained.setText(Messages.OPT_TAB_GROUP_LWT_RETAINED);
fd = new FormData();
fd.top = new FormAttachment(qosLabel, 0, SWT.CENTER);
fd.left = new FormAttachment(combo, 10);
retained.setLayoutData(fd);
// Hex
final Button hex = new Button(group, SWT.CHECK);
hex.setText(Messages.OPT_TAB_GROUP_LWT_HEX);
fd = new FormData();
fd.top = new FormAttachment(qosLabel, 0, SWT.CENTER);
fd.right = new FormAttachment(100, -4);
hex.setLayoutData(fd);
// **********************************************
// Row: Message - label
// **********************************************
// Topic - label
Label messageLabel = new Label(group, SWT.NONE);
fd = new FormData();
fd.top = new FormAttachment(topicLabel, 60);
fd.left = new FormAttachment(0, 10);
messageLabel.setLayoutData(fd);
messageLabel.setText(Messages.OPT_TAB_GROUP_LWT_MSG);
// Message - input
final Text messageText = new Text(group, SWT.MULTI | SWT.BORDER | SWT.WRAP | SWT.V_SCROLL);
fd = new FormData();
fd.top = new FormAttachment(messageLabel, 10, SWT.CENTER);
fd.left = new FormAttachment(topicText, 0, SWT.LEFT);
fd.right = new FormAttachment(topicText, 0, SWT.RIGHT);
// fd.width = 300;
fd.height = 60;
messageText.setLayoutData(fd);
// XXX handle input when in HEX mode
hex.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
Display.getDefault()
.asyncExec(
new Runnable() {
@Override
public void run() {
Button button = (Button) e.widget;
if (button.getSelection()) {
messageText.setText(Strings.toHex(messageText.getText()));
messageText.setEditable(false);
} else {
messageText.setText(Strings.hexToString(messageText.getText()));
messageText.setEditable(true);
}
}
});
}
});
// **********************************************
// DataBinding
// **********************************************
final DataBinding dataBinding = DataBindings.createDataBinding();
dataBinding.bindTextAsBytes(messageText, connection, Connection.PROP_OPT_LWT_PAYLOAD);
dataBinding.bindSelection(retained, connection, Connection.PROP_OPT_LWT_RETAIN);
// LWT view updater
lwtViewUpdater =
new ViewUpdater<Boolean>() {
final DecoratedBinding binding;
{
binding =
dataBinding
.bindText(
topicText,
connection,
Connection.PROP_OPT_LWT_TOPIC,
Validators.publishTopic)
.hideDecorations();
}
@Override
public void update(Boolean selected) {
Widgets.enable(group, selected);
if (selected) {
binding.showDecorations();
} else {
binding.hideDecorations();
}
}
};
// dispose dataBinding when UI is disposed
addDisposeListener(dataBinding);
// initial state
Widgets.enable(group, connection.getOptions().isLwtEnabled());
}
