// create the GUI: How is this called? Well,ExampleComponentProvider tells MCT that SaveStateModel
// is a view
public SaveModelStateView(AbstractComponent ac, ViewInfo vi) {
super(ac, vi);
// This GUI allows a user to modify the component's data and persist it.
TitledBorder titledBorder =
BorderFactory.createTitledBorder(bundle.getString("ModelBorderTitle"));
final JPanel jp = new JPanel();
jp.setBorder(titledBorder);
descriptionTextField = new JTextField();
descriptionTextField.setText(mr.getData().getDataDescription());
descriptionTextField.setToolTipText(bundle.getString("DescriptionToolTip"));
doubleDataTextField = new JTextField(String.valueOf(mr.getData().getDoubleData()));
doubleDataTextField.setText(String.valueOf(mr.getData().getDoubleData()));
doubleDataTextField.setToolTipText(bundle.getString("ValueToolTip"));
/*Purpose for DocumentListener: disable the save button for illegal inputs in the doubleDataTextField.
* An illegal input is when the user enters a non-number. Note: parse double
* parses "-46.81d" as "-46.81d" (that is, it allows d, i, L, f at the end of
* a number). I wanted to disable the save button if the user enters any letter,
* so that is why I first check if the text-field contains any letters before trying
* to parse it as a double.
*/
doubleDataTextField
.getDocument()
.addDocumentListener(
new DocumentListener() {
@Override
public void removeUpdate(DocumentEvent e) {
if (!saveButton.isEnabled()) saveButton.setEnabled(true);
try {
if (containsLetters(doubleDataTextField.getText()))
throw new NumberFormatException();
Double.parseDouble(doubleDataTextField.getText());
} catch (NumberFormatException s) {
saveButton.setEnabled(false);
}
}
@Override
public void insertUpdate(DocumentEvent e) {
if (!saveButton.isEnabled()) saveButton.setEnabled(true);
try {
if (containsLetters(doubleDataTextField.getText()))
throw new NumberFormatException();
Double.parseDouble(doubleDataTextField.getText());
} catch (NumberFormatException s) {
saveButton.setEnabled(false);
}
}
@Override
public void changedUpdate(DocumentEvent e) {
if (!saveButton.isEnabled()) saveButton.setEnabled(true);
try {
if (containsLetters(doubleDataTextField.getText()))
throw new NumberFormatException();
Double.parseDouble(doubleDataTextField.getText());
} catch (NumberFormatException s) {
saveButton.setEnabled(false);
}
}
});
jp.add(descriptionTextField);
jp.add(doubleDataTextField);
addToLayout(
jp,
bundle.getString("Description"),
descriptionTextField,
bundle.getString("Value"),
doubleDataTextField,
saveButton);
saveButton.addActionListener(
new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
AbstractComponent component = getManifestedComponent();
mr.getData().setDoubleData(Double.parseDouble(doubleDataTextField.getText()));
mr.getData().setDataDescription(descriptionTextField.getText());
/*
* Note that save() tells MCT that the user wishes to persist the data into the database. Thus, when the user
* clicks save, and then switches away from this view (like by choosing the info-view) MCT will prompt the user
* if they wish to save the data.
*/
component.save();
}
});
// remember: MCT class 'View' extends a JPanel
add(jp);
}
// This method is a callback from BaseComponent refreshViewManifestations().
// Its job is to refresh all the GUI manifestations of this view role. In the case of updating the
// model,
// the refresh is done by copying new data from the model to the GUI visual elements.
// In our example, the visual elements are a text field and a double value field.
@Override
public void updateMonitoredGUI() {
ExampleModelRole mr = ExampleComponent.class.cast(getManifestedComponent()).getModel();
doubleDataTextField.setText(String.valueOf(mr.getData().getDoubleData()));
descriptionTextField.setText(mr.getData().getDataDescription());
}