Mixing Graphics and Components

[brownie124]

Hi,

I am very new to Java and am trying to do something that seems simple. I am drawing a rectangle and then attempting to put some components (Checkboxes, Lists, etc.) in the rectangle (NOTE: I cannot use the swing package so this is all AWT and Graphics).

I am having all kinds of problems with this. I am able to put one or the other up, but not both the rectangle and the components. Also, I am trying to setLocation() of my component and that isn't working at all. Here is the code:

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class Test1
{
	public static void main(String [] args) 
	{
		try 
		{
			AppWindow appwin = new AppWindow();
			appwin.setSize(new Dimension(appwin.WIDTH, appwin.HEIGHT));
			appwin.setBackground(Color.lightGray);
			appwin.setTitle("Test");
			appwin.center();
			appwin.show();
		}
		catch(Exception e) 
		{
			e.printStackTrace();
		}
	}
} // End Test1 Class

class AppWindow extends Frame
{
	public static final int WIDTH = 400;
	public static final int HEIGHT = 300;
	public static final String BOXCAPTION = "Show:";
	
	public AppWindow()
	{
		addWindowListener	(
							new WindowAdapter()
							{
								public void windowClosing(WindowEvent we)
								{
                   					dispose();
									System.exit(0);
	               				}
           					}
							);

	}

	public void paint(Graphics g)
	{
		//	Create our group box.
		
		GroupBox gb = new GroupBox(15, 35, WIDTH - 15, 105, g, BOXCAPTION);
		createCheckBoxes();
	}
	
	public void createCheckBoxes()
	{
		//	Add our check boxes to the group box.

		Checkbox cb1 = new Checkbox("Check box 1", true);
		Checkbox cb2 = new Checkbox("Check box 2", false);
		
		cb1.setLocation(80, 100);
		cb2.setLocation(80, 160);
		
		add(cb1);
		add(cb2);
		
		cb1.setVisible(true);
		cb2.setVisible(true);
	}
	
	public void center()
	{
		Dimension dim = getToolkit().getScreenSize();
		Rectangle abounds = getBounds();
		setLocation((dim.width - abounds.width) / 2, (dim.height - abounds.height) / 2);
	}
} // End AppWindow Class

class GroupBox
{
	public GroupBox(int x, int y, int intWidth, int intHeight, Graphics g)
	{
		this(x, y, intWidth, intHeight, g, "");
	}
		
	public GroupBox(int x, int y, int intWidth, int intHeight, Graphics g, String strCaption)
	{
		FontMetrics fm = g.getFontMetrics();
		int intSpace = 0;
	
		g.drawLine(x, y, x, intHeight);						// 	Left side of box.
		g.drawLine(x, y, 23, y);							//	Top left part of box -- before caption.
		if (strCaption.length() > 0)
		{
			g.drawString(strCaption, x + 10, y + 5);		//	Caption.
			intSpace = 2;
		}
		g.drawLine(23 + fm.stringWidth(strCaption) + intSpace, y, intWidth, y);	//	Top right part of the box -- after caption.
		g.drawLine(intWidth, y, intWidth, intHeight);		// 	Right side of box.
		g.drawLine(x, intHeight, intWidth, intHeight);		//	Draw bottom of box.
	}
} // End GroupBox Class

Any help or guidance would be very much appreciated.

Thanks,
- Michael

 

[hologram]

Michael,
Since nobody is answering this thread I gave it a try. Just before I wanted to give up and wish you good luck, it finally ran correct.
(It's your code with a few changes :
- setLayout(null); // to be able to specify x,y position
- setBounds(x,y,width,heigth); // if you don't use a LayoutManager you have to setBounds(...) for all components).
The book "Graphic Java : Mastering the awt" contains some usefull classes (source) (e.g. Border). With the book is included a jar file with the examples from the book. Size=1,57 MB. If you post your e-mail I can mail it to you.
Here is the code :

package com.ecc.swing2;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class AwtExample
{
    public static void main(String [] args)
    {
        try
        {
            AppWindow appwin = new AppWindow();
            appwin.setLayout(null); //Ward
            appwin.setSize(new Dimension(appwin.WIDTH, appwin.HEIGHT));
            appwin.setBackground(Color.lightGray);
            appwin.setTitle("Test");
            appwin.center();
            appwin.createCheckBoxes();  // Ward
            appwin.show();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
} // End Test1 Class

class AppWindow extends Frame
{
    public static final int WIDTH = 400;
    public static final int HEIGHT = 300;
    public static final String BOXCAPTION = "Show:";

    public AppWindow()
    {
        addWindowListener    (
                            new WindowAdapter()
                            {
                                public void windowClosing(WindowEvent we)
                                {
                                       dispose();
                                    System.exit(0);
                                   }
                               }
                            );

    }

    public void paint(Graphics g)
    {
       GroupBox gb = new GroupBox(15, 35, WIDTH - 15, 105, g, BOXCAPTION);
    }

    public void createCheckBoxes()
    {
        //    Add our check boxes to the group box.
        Checkbox cb1 = new Checkbox("Check box 1", true);
        Checkbox cb2 = new Checkbox("Check box 2", false);
        cb1.setBounds(20,60,90,20);   // Ward
        cb2.setBounds(120,60,90,20);  // Ward
        add(cb1);
        add(cb2);
   }

    public void center()
    {
        Dimension dim = getToolkit().getScreenSize();
        Rectangle abounds = getBounds();
        setLocation((dim.width - abounds.width) / 2, (dim.height - abounds.height) / 2);
    }
} // End AppWindow Class

class GroupBox
{
    public GroupBox(int x, int y, int intWidth, int intHeight, Graphics g)
    {
        this(x, y, intWidth, intHeight, g, "");
    }

    public GroupBox(int x, int y, int intWidth, int intHeight, Graphics g, String strCaption)
    {
        FontMetrics fm = g.getFontMetrics();
        int intSpace = 0;

        g.drawLine(x, y, x, intHeight);                        //     Left side of box.
        g.drawLine(x, y, 23, y);                            //    Top left part of box -- before caption.
        if (strCaption.length() > 0)
        {
            g.drawString(strCaption, x + 10, y + 5);        //    Caption.
            intSpace = 2;
        }
        g.drawLine(23 + fm.stringWidth(strCaption) + intSpace, y, intWidth, y);    //    Top right part of the box -- after caption.
        g.drawLine(intWidth, y, intWidth, intHeight);        //     Right side of box.
        g.drawLine(x, intHeight, intWidth, intHeight);        //    Draw bottom of box.
    }
} // End GroupBox Class

 

[hologram]

If you are using jdk1.2 or later, casting the Graphics g object to a Graphics2D object should give you some extra functionality in the paint method.

    public void paint(Graphics g)
    {
      super.paint(g);
      Graphics2D g2d = (Graphics2D)g;
      g2d.drawString(...);
      ...
    }

 

[brownie124]

Thanks for the great feedback.

Hologram: Thanks for taking the time to get this to work. Also, I would love to get that book. My email is
michael@michaelbrown.online.com

- Michael

 

[hologram]

Michael,
When I try to mail to you, I get an error on your email address :

The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'michael@michaelbrown.online.com'. Subject 'Graphic Java, Mastering the AWT examples', Account: 'Telenet Mail', Server: 'smtp.telenet.be', Protocol: SMTP, Server Response: '450 <michael@michaelbrown.online.com>: Recipient address rejected: Domain not found', Port: 25, Secure(SSL): No, Server Error: 450, Error Number: 0x800CCC79

Only the examples are on the CD, NOT the book itself (1997)

 

[brownie124]

ok, try this: mbrown@legato.com

Thanks,
- Michael