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import java.io.IOException;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceDialog;
import org.eclipse.jface.preference.PreferenceManager;
import org.eclipse.jface.preference.PreferenceNode;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.jface.preference.PreferenceStore;
import org.eclipse.jface.resource.ImageDescriptor;
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.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
/**
* This class demonstrates JFace preferences
*/
public class ShowPrefs {
/**
* Runs the application
*/
public void run() {
Display display = new Display();
// Create the preference manager
PreferenceManager mgr = new PreferenceManager();
// Create the nodes
PreferenceNode one = new PreferenceNode("one", "One", ImageDescriptor
.createFromFile(ShowPrefs.class, "java2s.gif"),
PrefPageOne.class.getName());
PreferenceNode two = new PreferenceNode("two", new PrefPageTwo());
// Add the nodes
mgr.addToRoot(one);
mgr.addTo(one.getId(), two);
// Create the preferences dialog
PreferenceDialog dlg = new PreferenceDialog(null, mgr);
// Set the preference store
PreferenceStore ps = new PreferenceStore("showprefs.properties");
try {
ps.load();
} catch (IOException e) {
// Ignore
}
dlg.setPreferenceStore(ps);
// Open the dialog
dlg.open();
try {
// Save the preferences
ps.save();
} catch (IOException e) {
e.printStackTrace();
}
display.dispose();
}
/**
* The application entry point
*
* @param args
* the command line arguments
*/
public static void main(String[] args) {
new ShowPrefs().run();
}
}
/**
* This class creates a preference page
*/
class PrefPageOne extends PreferencePage {
// Names for preferences
private static final String ONE = "one.one";
private static final String TWO = "one.two";
private static final String THREE = "one.three";
// Text fields for user to enter preferences
private Text fieldOne;
private Text fieldTwo;
private Text fieldThree;
/**
* Creates the controls for this page
*/
protected Control createContents(Composite parent) {
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(new GridLayout(2, false));
// Get the preference store
IPreferenceStore preferenceStore = getPreferenceStore();
// Create three text fields.
// Set the text in each from the preference store
new Label(composite, SWT.LEFT).setText("Field One:");
fieldOne = new Text(composite, SWT.BORDER);
fieldOne.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
fieldOne.setText(preferenceStore.getString(ONE));
new Label(composite, SWT.LEFT).setText("Field Two:");
fieldTwo = new Text(composite, SWT.BORDER);
fieldTwo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
fieldTwo.setText(preferenceStore.getString(TWO));
new Label(composite, SWT.LEFT).setText("Field Three:");
fieldThree = new Text(composite, SWT.BORDER);
fieldThree.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
fieldThree.setText(preferenceStore.getString(THREE));
return composite;
}
/**
* Called when user clicks Restore Defaults
*/
protected void performDefaults() {
// Get the preference store
IPreferenceStore preferenceStore = getPreferenceStore();
// Reset the fields to the defaults
fieldOne.setText(preferenceStore.getDefaultString(ONE));
fieldTwo.setText(preferenceStore.getDefaultString(TWO));
fieldThree.setText(preferenceStore.getDefaultString(THREE));
}
/**
* Called when user clicks Apply or OK
*
* @return boolean
*/
public boolean performOk() {
// Get the preference store
IPreferenceStore preferenceStore = getPreferenceStore();
// Set the values from the fields
if (fieldOne != null) preferenceStore.setValue(ONE, fieldOne.getText());
if (fieldTwo != null) preferenceStore.setValue(TWO, fieldTwo.getText());
if (fieldThree != null)
preferenceStore.setValue(THREE, fieldThree.getText());
// Return true to allow dialog to close
return true;
}
}
/**
* This class creates a preference page
*/
class PrefPageTwo extends PreferencePage {
// Names for preferences
private static final String ONE = "two.one";
private static final String TWO = "two.two";
private static final String THREE = "two.three";
// The checkboxes
private Button checkOne;
private Button checkTwo;
private Button checkThree;
/**
* PrefPageTwo constructor
*/
public PrefPageTwo() {
super("Two");
setDescription("Check the checks");
}
/**
* Creates the controls for this page
*/
protected Control createContents(Composite parent) {
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(new RowLayout(SWT.VERTICAL));
// Get the preference store
IPreferenceStore preferenceStore = getPreferenceStore();
// Create three checkboxes
checkOne = new Button(composite, SWT.CHECK);
checkOne.setText("Check One");
checkOne.setSelection(preferenceStore.getBoolean(ONE));
checkTwo = new Button(composite, SWT.CHECK);
checkTwo.setText("Check Two");
checkTwo.setSelection(preferenceStore.getBoolean(TWO));
checkThree = new Button(composite, SWT.CHECK);
checkThree.setText("Check Three");
checkThree.setSelection(preferenceStore.getBoolean(THREE));
return composite;
}
/**
* Add buttons
*
* @param parent the parent composite
*/
protected void contributeButtons(Composite parent) {
// Add a select all button
Button selectAll = new Button(parent, SWT.PUSH);
selectAll.setText("Select All");
selectAll.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
checkOne.setSelection(true);
checkTwo.setSelection(true);
checkThree.setSelection(true);
}
});
// Add a select all button
Button clearAll = new Button(parent, SWT.PUSH);
clearAll.setText("Clear All");
clearAll.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
checkOne.setSelection(false);
checkTwo.setSelection(false);
checkThree.setSelection(false);
}
});
// Add two columns to the parent's layout
((GridLayout) parent.getLayout()).numColumns += 2;
}
/**
* Change the description label
*/
protected Label createDescriptionLabel(Composite parent) {
Label label = null;
String description = getDescription();
if (description != null) {
// Upper case the description
description = description.toUpperCase();
// Right-align the label
label = new Label(parent, SWT.RIGHT);
label.setText(description);
}
return label;
}
/**
* Called when user clicks Restore Defaults
*/
protected void performDefaults() {
// Get the preference store
IPreferenceStore preferenceStore = getPreferenceStore();
// Reset the fields to the defaults
checkOne.setSelection(preferenceStore.getDefaultBoolean(ONE));
checkTwo.setSelection(preferenceStore.getDefaultBoolean(TWO));
checkThree.setSelection(preferenceStore.getDefaultBoolean(THREE));
}
/**
* Called when user clicks Apply or OK
*
* @return boolean
*/
public boolean performOk() {
// Get the preference store
IPreferenceStore preferenceStore = getPreferenceStore();
// Set the values from the fields
if (checkOne != null) preferenceStore.setValue(ONE, checkOne.getSelection());
if (checkTwo != null) preferenceStore.setValue(TWO, checkTwo.getSelection());
if (checkThree != null)
preferenceStore.setValue(THREE, checkThree.getSelection());
// Return true to allow dialog to close
return true;
}
}
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