// This program demonstrates the use of the ImageButton class,
// a class that can be used to create
//
//               BUTTONS WITH PICTURES ON THEM
//
// instead of just words.

// Put the code for the Demo class in a file called Demo.java.
// Put the code for the ImageButton class in a file called ImageButton.java.
// Then type "javac Demo.java"
//     (both classes will compile if they are in the same directory).

// You need an image for this program. One is included in uuencoded form.
// To extract the image put the uuencoded section in a file called
// "button.uue". Then type "uudecode button.uue".
// If you don't have a uudecode program, then you can create a small gif
// image some other way and put it in a file called "button.gif".

// Type "java Demo" to run the program.

// The ImageButton class is Copyright by Larry Landwehr (see below).
// If you like the class, please drop me a line.




// ____________________D E M O   C L A S S____________________

// Written by Larry Landwehr - bitsafe@execpc.com
// COPYRIGHT 2/96


import java.awt.*;

public class Demo extends Frame {

    public Demo() {

        MediaTracker tracker = new MediaTracker(this);
        Image image = Toolkit.getDefaultToolkit().getImage("button.gif");
        tracker.addImage(image, 0);
        try {
            tracker.waitForID(0);
        } catch (InterruptedException e) {
            System.out.println("Couldn't get image");
            System.exit(0);
        }

        Panel p = new Panel();
        p.add(new ImageButton(image));
        add("Center", p);

        Dimension d;
        d = Toolkit.getDefaultToolkit().getScreenSize();
        resize(d.width/2, d.height/2);
        show();
    }

    public boolean handleEvent(Event evt) {
        switch (evt.id) {
            case Event.WINDOW_DESTROY:
                System.exit(0);
        }
        return(false);
    }

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



// _______________I M A G E B U T T O N   C L A S S____________________

// Written by Larry Landwehr - bitsafe@execpc.com
// COPYRIGHT 2/96

// This class can be freely used in other programs as long as my
// name and copyright notice are acknowledged and remain with the
// source code.


import java.awt.*;

public class ImageButton extends Canvas {

    Image image = null;
    boolean pressed = false;
    boolean showPressed = false;

    public ImageButton() {
        resize(50, 30);
    }

    public ImageButton(int x, int y) {
        resize(x, y);
    }

    public ImageButton(Image image) {
        this.image = image;
        resize(image.getWidth(this)+4, image.getHeight(this)+4);
    }

    public Image getImage() {
        return(image);
    }

    public void setImage(Image image) {
        this.image = image;
        resize(image.getWidth(this)+4, image.getHeight(this)+4);
    }

    public void paint(Graphics g) {
        Dimension d = size();
        drawFrame(g, d.width, d.height, showPressed);
        if (image != null)
            g.drawImage(image, 2, 2, d.width-4, d.height-4, this);
    }

    public boolean mouseDown(Event evt, int x, int y) {
        pressed = true;
        showPressed = true;
        repaint();
        return(true);
    }

    public boolean mouseExit(Event evt, int x, int y) {
        if (showPressed) {
            showPressed = false;
            repaint();
        }
        return(true);
    }

    public boolean mouseEnter(Event evt, int x, int y) {
        if (pressed) {
            showPressed = true;
            repaint();
        }
        return(true);
    }

    public boolean mouseUp(Event evt, int x, int y) {
        pressed = false;
        if (inside(x, y)) {
            showPressed = false;
            repaint();
            doAction();
        }
        return(true);
    }

    private void drawFrame(Graphics g, int width, int height, boolean pressed) {
        if (pressed) g.setColor(Color.darkGray);
        else g.setColor(Color.white);
        g.drawLine(0, 0, width-1, 0);
        g.drawLine(0, 1, width-2, 1);
        g.drawLine(0, 0, 0, height-1);
        g.drawLine(1, 0, 1, height-2);
        if (pressed) g.setColor(Color.white);
        else g.setColor(Color.darkGray);
        g.drawLine(0, height-1, width, height-1);
        g.drawLine(1, height-2, width, height-2);
        g.drawLine(width-1, 0, width-1, height);
        g.drawLine(width-2, 1, width-2, height);
    }

    // Needed because Java has a bug
    public boolean inside(int x, int y) {
        Rectangle r = bounds();
        return(x >= 0 && x < r.width && y >= 0 && y < r.height);
    }

    // This method should be overridden in a subclass
    // to have the button do something useful
    public void doAction() {
        System.out.println(this);
    }
}



// _______________U U E N C O D E D   G I F____________________

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