CoolBarTest.java Source code

Introduction

Here is the source code for CoolBarTest.java

Source

//Send questions, comments, bug reports, etc. to the authors:

//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)

import java.io.*;

import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.SWT;

public class CoolBarTest {
    private static final String IMAGE_PATH = "images" + System.getProperty("file.separator");

    private Image circle;
    private Image square;
    private Image star;
    private Image triangle;

    /**
     * Runs the application
     */
    public void run() {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("CoolBar Test");
        createImages(shell);
        createContents(shell);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        disposeImages();
        display.dispose();
    }

    /**
     * Creates the window contents
     * 
     * @param shell the parent shell
     */
    private void createContents(Shell shell) {
        shell.setLayout(new GridLayout(1, false));
        CoolBar coolbar = createCoolBar(shell);
        coolbar.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    }

    /**
     * Creates the CoolBar
     * 
     * @param shell the parent shell
     * @return CoolBar
     */
    private CoolBar createCoolBar(Shell shell) {
        CoolBar coolbar = new CoolBar(shell, SWT.NONE);

        // Create toolbar coolitem
        final CoolItem item = new CoolItem(coolbar, SWT.DROP_DOWN);
        item.setControl(createToolBar(coolbar));
        calcSize(item);

        // Add a listener to handle clicks on the chevron button
        item.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent event) {
                calcSize(item);
            }
        });

        // Create combo coolitem
        CoolItem item2 = new CoolItem(coolbar, SWT.NONE);
        item2.setControl(createCombo(coolbar));
        calcSize(item2);

        // Create a dropdown coolitem
        item2 = new CoolItem(coolbar, SWT.NONE);
        item2.setControl(createStackedButtons(coolbar));
        calcSize(item2);

        return coolbar;
    }

    /**
     * Creates the ToolBar
     * 
     * @param composite the parent composite
     * @return Control
     */
    private Control createToolBar(Composite composite) {
        ToolBar toolBar = new ToolBar(composite, SWT.NONE);
        ToolItem item = new ToolItem(toolBar, SWT.PUSH);
        item.setImage(circle);
        item = new ToolItem(toolBar, SWT.PUSH);
        item.setImage(square);
        item = new ToolItem(toolBar, SWT.PUSH);
        item.setImage(star);
        item = new ToolItem(toolBar, SWT.PUSH);
        item.setImage(triangle);
        return toolBar;
    }

    /**
     * Creates the Combo
     * 
     * @param composite the parent composite
     * @return Control
     */
    private Control createCombo(Composite composite) {
        // A bug with Windows causes the Combo not to drop
        // down if you add it directly to the CoolBar.
        // To work around this, create a Composite, add the
        // Combo to it, and add the Composite to the CoolBar.
        // This should work both on Windows and on all other
        // platforms.
        Composite c = new Composite(composite, SWT.NONE);
        c.setLayout(new FillLayout());
        Combo combo = new Combo(c, SWT.DROP_DOWN);
        combo.add("Option One");
        combo.add("Option Two");
        combo.add("Option Three");
        return c;
    }

    /**
     * Creates two stacked buttons
     * 
     * @param composite the parent composite
     * @return Control
     */
    private Control createStackedButtons(Composite composite) {
        Composite c = new Composite(composite, SWT.NONE);
        c.setLayout(new GridLayout(1, false));
        new Button(c, SWT.PUSH).setText("Button One");
        new Button(c, SWT.PUSH).setText("Button Two");
        return c;
    }

    /**
     * Helper method to calculate the size of the cool item
     * 
     * @param item the cool item
     */
    private void calcSize(CoolItem item) {
        Control control = item.getControl();
        Point pt = control.computeSize(SWT.DEFAULT, SWT.DEFAULT);
        pt = item.computeSize(pt.x, pt.y);
        item.setSize(pt);
    }

    /**
     * Creates the images
     * 
     * @param shell the parent shell
     */
    private void createImages(Shell shell) {
        try {
            circle = new Image(shell.getDisplay(), new FileInputStream(IMAGE_PATH + "circle.gif"));
            square = new Image(shell.getDisplay(), new FileInputStream(IMAGE_PATH + "square.gif"));
            star = new Image(shell.getDisplay(), new FileInputStream(IMAGE_PATH + "star.gif"));
            triangle = new Image(shell.getDisplay(), new FileInputStream(IMAGE_PATH + "triangle.gif"));
        } catch (IOException e) {
            // Images not found; handle gracefully
        }
    }

    /**
     * Disposes the images
     */
    private void disposeImages() {
        if (circle != null)
            circle.dispose();
        if (square != null)
            square.dispose();
        if (star != null)
            star.dispose();
        if (triangle != null)
            triangle.dispose();
    }

    /**
     * The entry point for the application
     * 
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new CoolBarTest().run();
    }
}