ControlEditorSample.java Source code

Introduction

Here is the source code for ControlEditorSample.java

Source

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();

    }
}