ControlEditor offers basic control-editing abilities.
It has three derived classes: TableEditor, TreeEditor, and TableTreeEditor.
import java.util.HashMap;
import java.util.Map;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ControlEditor;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class ControlEditorSample {
private static final Map COLORS = new HashMap();
static {
COLORS.put("red", new RGB(255, 0, 0));
COLORS.put("green", new RGB(0, 255, 0));
COLORS.put("blue", new RGB(0, 0, 255));
COLORS.put("yellow", new RGB(255, 255, 0));
COLORS.put("black", new RGB(0, 0, 0));
COLORS.put("white", new RGB(255, 255, 255));
}
static Display display = new Display();
static Color color = new Color(display, 255, 0, 0);
public static void main(String[] args) {
final Shell shell = new Shell(display);
shell.setText("Control Editor");
final Composite composite = new Composite(shell, SWT.NONE);
composite.setBackground(color);
composite.setBounds(0, 0, 300, 100);
ControlEditor editor = new ControlEditor(composite);
final Text text = new Text(composite, SWT.BORDER);
text.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent event) {
RGB rgb = (RGB) COLORS.get(text.getText());
if (rgb != null) {
if (color != null)
color.dispose();
color = new Color(shell.getDisplay(), rgb);
composite.setBackground(color);
}
}
});
// Place the editor in the top middle of the parent composite
editor.horizontalAlignment = SWT.CENTER;
editor.verticalAlignment = SWT.TOP;
Point size = text.computeSize(SWT.DEFAULT, SWT.DEFAULT);
editor.minimumWidth = size.x;
editor.minimumHeight = size.y;
editor.setEditor(text);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
if (color != null)
color.dispose();
display.dispose();
}
}