Java Tutorial/SWT/ControlEditor
Control Editors
ControlEditor offers basic control-editing abilities. It has three derived classes: TableEditor, TreeEditor, and TableTreeEditor.
<source lang="java">
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.ruposite; 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.ruputeSize(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(); }
}</source>
Control Editor With Dialog
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.ControlEditor; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.ColorDialog; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class ControlEditorWithDialog {
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 Two"); final Composite composite = new Composite(shell, SWT.NONE); composite.setBackground(color); composite.setBounds(0, 0, 300, 100); ControlEditor editor = new ControlEditor(composite); // Create the control associated with the editor Button button = new Button(composite, SWT.PUSH); button.setText("Change Color..."); button.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { ColorDialog dialog = new ColorDialog(shell); if (color != null) dialog.setRGB(color.getRGB()); RGB rgb = dialog.open(); if (rgb != null) { if (color != null) color.dispose(); color = new Color(shell.getDisplay(), rgb); composite.setBackground(color); } } }); // Place the editor along the bottom of the parent composite editor.grabHorizontal = true; editor.verticalAlignment = SWT.BOTTOM; Point size = button.ruputeSize(SWT.DEFAULT, SWT.DEFAULT); editor.minimumHeight = size.y; editor.setEditor(button); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } if (color != null) color.dispose(); display.dispose(); }
}</source>