org.eclipse.jface.databinding.swt.SWTObservables.observeSingleSelectionIndex(Control)
この目的のために使用できます...
package test123;
import java.beans.PropertyChangeListener;
import org.eclipse.core.databinding.AggregateValidationStatus;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.validation.IValidator;
import org.eclipse.core.databinding.validation.ValidationStatus;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.databinding.swt.ISWTObservableValue;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
public class Test123 extends Shell {
private static class Pojo<T> {
private T data;
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
public void addPropertyChangeListener(PropertyChangeListener l) {
}
public void removePropertyChangeListener(PropertyChangeListener l) {
}
}
/**
* Launch the application.
*
* @param args
*/
public static void main(String args[]) {
try {
final Display display = Display.getDefault();
Realm.runWithDefault(SWTObservables.getRealm(display),
new Runnable() {
@Override
public void run() {
Test123 shell = new Test123(display);
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Create the shell.
*
* @param display
*/
public Test123(Display display) {
super(display, SWT.SHELL_TRIM);
setLayout(new GridLayout(1, false));
Combo combo = new Combo(this, SWT.READ_ONLY);
combo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1,
1));
combo.setItems(new String[] { "Test 1", "Test 2", "Test 3" });
createContents();
final Pojo<Integer> pojo = new Pojo<Integer>();
ISWTObservableValue swtObs = SWTObservables
.observeSingleSelectionIndex(combo);
Label lblNewLabel = new Label(this, SWT.NONE);
lblNewLabel.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false,
false, 1, 1));
IObservableValue modelObs = BeansObservables.observeValue(pojo, "data");
final DataBindingContext dataBindingContext = new DataBindingContext();
dataBindingContext.bindValue(swtObs, modelObs, new UpdateValueStrategy(
UpdateValueStrategy.POLICY_CONVERT)
.setAfterConvertValidator(new IValidator() {
@Override
public IStatus validate(Object value) {
if ((Integer) value == 1) {
return ValidationStatus
.error("Test 2 is not allowed");
}
return ValidationStatus.ok();
}
}), null);
addDisposeListener(new DisposeListener() {
@Override
public void widgetDisposed(DisposeEvent e) {
// this is neccessary since POLICY_CONVERT does not
// automatically set the value to the model.
dataBindingContext.updateModels();
System.out.println(pojo.getData());
}
});
ISWTObservableValue valiObs = SWTObservables.observeText(lblNewLabel);
dataBindingContext.bindValue(valiObs, new AggregateValidationStatus(
dataBindingContext.getBindings(),
AggregateValidationStatus.MAX_SEVERITY));
}
/**
* Create contents of the shell.
*/
protected void createContents() {
setText("SWT Application");
setSize(450, 300);
}
@Override
protected void checkSubclass() {
// Disable the check that prevents subclassing of SWT components
}
}