ControlSizeLocation.java Source code

Introduction

Here is the source code for ControlSizeLocation.java

Source

/******************************************************************************
 * Copyright (c) 1998, 2004 Jackwind Li Guojie
 * All right reserved. 
 * 
 * Created on Jan 23, 2004 11:26:26 PM by JACK
 * $Id$
 * 
 * visit: http://www.asprise.com/swt
 *****************************************************************************/

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class ControlSizeLocation {
    Display display = new Display();
    Shell shell = new Shell(display);

    Button button;

    Text x;
    Text y;
    Text h;
    Text w;

    Button get;
    Button set;

    public ControlSizeLocation() {
        init();

        shell.pack();
        shell.open();
        //textUser.forceFocus();

        // Set up the event loop.
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                // If no more entries in event queue
                display.sleep();
            }
        }

        display.dispose();
    }

    private void init() {
        GridLayout gridLayout = new GridLayout(2, true);
        shell.setLayout(gridLayout);

        Composite left = new Composite(shell, SWT.NULL);
        left.setLayout(new GridLayout());
        //left.setLayout(new FillLayout());
        left.setLayoutData(new GridData(GridData.FILL_BOTH));
        left.setBackground(display.getSystemColor(SWT.COLOR_GREEN));

        button = new Button(left, SWT.PUSH);
        button.setText("Button");
        button.setLayoutData(new GridData());

        Composite right = new Composite(shell, SWT.NULL);
        right.setLayout(new GridLayout(4, true));
        right.setLayoutData(new GridData(GridData.FILL_BOTH));

        Label label = new Label(right, SWT.NULL);
        label.setText("X");

        label = new Label(right, SWT.NULL);
        label.setText("Y");

        label = new Label(right, SWT.NULL);
        label.setText("Width");

        label = new Label(right, SWT.NULL);
        label.setText("Height");

        x = new Text(right, SWT.BORDER);
        y = new Text(right, SWT.BORDER);
        w = new Text(right, SWT.BORDER);
        h = new Text(right, SWT.BORDER);

        SelectionListener selectionListener = new SelectionListener() {
            public void widgetSelected(SelectionEvent e) {
                Button b = (Button) e.widget;
                if (b == get) {
                    System.out.println("------------------------------");
                    System.out.println("getBounds: " + button.getBounds());
                    System.out.println("getLocation: " + button.getLocation());
                    System.out.println("getSize: " + button.getSize());

                } else if (b == set) {
                    int vx = getNumber(x);
                    int vy = getNumber(y);
                    int vw = getNumber(w);
                    int vh = getNumber(h);

                    if (vx != -1 && vy != -1) {
                        if (vw != -1 && vh != -1) {
                            Rectangle rectangle = new Rectangle(vx, vy, vw, vh);
                            button.setBounds(rectangle);
                            System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
                            System.out.println("# setBounds: " + rectangle);
                        } else {
                            Point point = new Point(vx, vy);
                            button.setLocation(point);
                            System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
                            System.out.println("# setLocation: " + point);
                        }
                    } else if (vw != -1 && vh != -1) {
                        Point point = new Point(vw, vh);
                        button.setSize(point);
                        System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
                        System.out.println("# setSize: " + point);
                    }
                }

            }

            public void widgetDefaultSelected(SelectionEvent e) {
                // TODO Auto-generated method stub

            }
        };

        get = new Button(right, SWT.PUSH);
        get.setText("Get");
        get.addSelectionListener(selectionListener);

        set = new Button(right, SWT.PUSH);
        set.setText("Set");
        set.addSelectionListener(selectionListener);

    }

    /**
     * 
     * @param text
     * @return <code>-1</code> if invalid.
     */
    private int getNumber(Text text) {
        if (text == null)
            return -1;
        String value = text.getText();
        if (value == null || value.trim().length() == 0)
            return -1;
        try {
            return Integer.parseInt(value.trim());
        } catch (Exception e) {

        }
        return -1;
    }

    public static void main(String[] args) {
        new ControlSizeLocation();
    }
}