Problem displaying CheckboxGroup on JFrame
I was recently assigned the task of creating exams. I am trying to create a CheckboxGroup in a class that was passed the Graphics2D tool. This code compiles with no errors when I call it's method:
setLayout(new GridLayout(1, 5));
CheckboxGroup cbg = new CheckboxGroup();
add(new Checkbox("Never", cbg, false));
add(new Checkbox("Almost Never", cbg, false));
add(new Checkbox("Sometimes", cbg, false));
add(new Checkbox("Almost All The Time", cbg, false));
add(new Checkbox("All The Time", cbg, false));
but nothing displays on my JFrame, I tried to draw it with this line(g2 is my Graphics2D tool):
g2.draw(cbg);
but I get an error when compiling that says draw doesn't work. Am I totally off-track with this or is there a simple Graphics2D method that I use to draw this CheckboxGroup?
You should not mix Swing components with AWT ones.
Try this code:
import javax.swing.*;
import java.awt.*;
public class Jason{
public static void main(String[] args){
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container con = frame.getContentPane();
con.setLayout(new GridLayout(5, 1));
ButtonGroup bg = new ButtonGroup();
bg.add((JRadioButton)con.add(new JRadioButton("Never", false)));
bg.add((JRadioButton)con.add(new JRadioButton("Almost Never", false)));
bg.add((JRadioButton)con.add(new JRadioButton("Sometimes", false)));
bg.add((JRadioButton)con.add(new JRadioButton("Allmost All The Time", false)));
bg.add((JRadioButton)con.add(new JRadioButton("All The Time", false)));
frame.setSize(300, 300);
frame.setVisible(true);
}
}
hiwaa at 2007-7-12 23:03:53 >
hiwa: Thanks for the tip, I won't mix those libraries anymore
pete: Here is all of my code so far sorry it's sloppy, I'm just getting back into coding after one semester of Intro to Computer Science using Java almost a year ago::
/*this class has main function**************************************************/
import javax.swing.JFrame;
import javax.swing.JOptionPane;
public class PDS_Questionnaire
{
public static void main(String[] args)
{
//declare JFrame window dimensions
int WIDTH = 500;
int HEIGHT = 400;
//create JFrame
JFrame frame = new JFrame();
frame.setSize(HEIGHT, WIDTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//create object of painter class to install onto frame
ScoreCard survey = new ScoreCard();
//add object to frame and set visible
frame.add(survey);
frame.setVisible(true);
}
}
/*********************end of class***************************************/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/****************************new class**********************************/
//this class is the JFrame painter, it initiates the Graphics2D class then passes the
//Graphics object to PDS_Scorer so that the PDS_Scorer class can draw on the patientsCard
import javax.swing.JComponent;
import java.awt.Graphics;
import java.awt.Graphics2D;
public class ScoreCard extends JComponent
{
public ScoreCard()
{
}
public void paintComponent(Graphics g)
{
//recover Graphics2D
Graphics2D g2 = (Graphics2D) g;
//create another class and pass the Graphics2D tool
PDS_Scorer patientsCard = new PDS_Scorer(g2);
//call method to draw the check boxes
patientsCard.drawCheckBoxes();
}
}
/*********************end of class***************************************/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/****************************new class**********************************/
import javax.swing.JComponent;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Checkbox;
import java.awt.CheckboxGroup;
public class PDS_Scorer extends JComponent
{
public PDS_Scorer(Graphics2D gTwo)
{
g2 = gTwo;
}
public void partA_Scorer()
{
}
public void partB_Scorer()
{
}
public void partC_Scorer()
{
}
public void partD_Scorer()
{
}
public void partE_Scorer()
{
}
public void partF_Scorer()
{
}
public void drawCheckBoxes()
{
// draw3DRect(int x, int y, int width, int height, boolean raised)
//Draws a 3-D highlighted outline of the specified rectangle.
g2.draw3DRect(10, 10, 10, 10, true);//this works
setLayout(new GridLayout(1, 5));
CheckboxGroup cbg = new CheckboxGroup();
add(new Checkbox("Never", cbg, false));
add(new Checkbox("Almost Never", cbg, false));
add(new Checkbox("Sometimes", cbg, false));
add(new Checkbox("Almost All The Time", cbg, false));
add(new Checkbox("All The Time", cbg, false));
//g2.drawString("One Lazy Fox", 22.5, 55.5);
}
private Graphics2D g2;
}
