Paint Application that doesn't paint, problems with mouseEvents and StateChanged
Hi, I'm writing a paint application for my java class. I've gotten the JFrame to look the way it's supposed to, and everything looks in order, but I can't draw. Something's wrong but I can't tell what it is. Can anyone help?
Code:
import javax.swing.*;
import javax.swing.border.BevelBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*;
import java.awt.event.*;
import java.util.Hashtable;
public class PaintApp extends JFrame implements ActionListener, ChangeListener, MouseMotionListener, MouseListener
{ JLabel textprompt = new JLabel("Enter text, then click location:");
JTextField textinput = new JTextField("", 25);
ImageIcon eraserIcon = new ImageIcon("eraser.jpg");
JButton eraser = new JButton(eraserIcon);
ImageIcon pencilIcon = new ImageIcon("pencil.jpg");
JButton pencil = new JButton(pencilIcon);
ImageIcon brushIcon = new ImageIcon("brush.jpg");
JButton brush = new JButton(brushIcon);
ImageIcon textIcon = new ImageIcon("text.jpg");
JButton text = new JButton (textIcon);
JLabel stroke = new JLabel("Stroke:");
JSlider sliderbar = new JSlider(JSlider.VERTICAL, 0,3,3);
ImageIcon redIcon = new ImageIcon("red.gif");
JButton redCrayon = new JButton (redIcon);
ImageIcon yellowIcon = new ImageIcon("yellow.gif");
JButton yellowCrayon = new JButton (yellowIcon);
ImageIcon greenIcon = new ImageIcon("green.gif");
JButton greenCrayon = new JButton (greenIcon);
ImageIcon blueIcon = new ImageIcon("blue.gif");
JButton blueCrayon = new JButton (blueIcon);
JPanel topPanel = new JPanel(new FlowLayout());
JPanel centerPanel = new JPanel(new FlowLayout());
JPanel sidePanel = new JPanel(new GridLayout(6,1));
JPanel bottomPanel = new JPanel(new GridLayout(2,2));
boolean eraserOn = false;
boolean pencilOn = false;
boolean brushOn = false;
boolean textOn = false;
int last_x=-10;
int last_y=-10;
int xpos=-10;
int ypos=-10;
Color drawColor = (Color.RED);
Font font1 = new Font("Arial", Font.PLAIN, 20);
int value;
JMenuBar menuBar = new JMenuBar();
JMenu file = new JMenu("File");
JMenuItem newopt = new JMenuItem("New");
JMenuItem exit = new JMenuItem("Exit");
JMenu help = new JMenu("Help");
JMenuItem about = new JMenuItem("About");
JLabel createdby = new JLabel("Created by LV");
float lineWeight;
BasicStroke str = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
Container con = null;
public PaintApp()
{
super("My Paint Program");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
con = this.getContentPane();
con.setLayout(new BorderLayout());
setJMenuBar(menuBar);
menuBar.add(file);
menuBar.add(help);
file.add(newopt);
file.add(exit);
help.add(about);
newopt.addActionListener(this);
exit.addActionListener(this);
about.addActionListener(this);
topPanel.add(textprompt);
textprompt.setEnabled(false);
topPanel.add(textinput);
textinput.setEditable(false);
centerPanel.setBackground(Color.white);
centerPanel.add(createdby);
createdby.setVisible(false);
sidePanel.add(eraser);
eraser.setBorder(new BevelBorder(BevelBorder.RAISED));
eraser.addActionListener(this);
sidePanel.add(pencil);
pencil.setBorder(new BevelBorder(BevelBorder.LOWERED));
pencil.addActionListener(this);
sidePanel.add(brush);
brush.setBorder(new BevelBorder(BevelBorder.RAISED));
brush.addActionListener(this);
sidePanel.add(text);
sidePanel.setBackground(Color.WHITE);
text.setBorder(new BevelBorder(BevelBorder.RAISED));
text.addActionListener(this);
sidePanel.add(stroke);
sidePanel.add(sliderbar);
sliderbar.setMinorTickSpacing(1);
sliderbar.setMajorTickSpacing(1);
sliderbar.setPaintTicks(true);
sliderbar.setPaintLabels(true);
sliderbar.setSnapToTicks(true);
Hashtable<Integer, JLabel> labelTable = new Hashtable<Integer, JLabel>();
labelTable.put(new Integer( 0 ), new JLabel("Thin") );
labelTable.put(new Integer(3), new JLabel("Thick") );
sliderbar.setLabelTable( labelTable );
sliderbar.addChangeListener(this);
bottomPanel.add(redCrayon);
redCrayon.setBorder(new BevelBorder(BevelBorder.LOWERED));
redCrayon.addActionListener(this);
bottomPanel.add(yellowCrayon);
yellowCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
yellowCrayon.addActionListener(this);
bottomPanel.add(greenCrayon);
greenCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
greenCrayon.addActionListener(this);
bottomPanel.add(blueCrayon);
blueCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
blueCrayon.addActionListener(this);
con.add(topPanel, BorderLayout.NORTH);
con.add(centerPanel, BorderLayout.CENTER);
con.add(sidePanel, BorderLayout.WEST);
con.add(bottomPanel, BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e)
{ Object source = e.getSource();
if (source == exit)
{
System.exit(0);
}
if (source == newopt)
{centerPanel.repaint();
}
if (source == about)
{createdby.setVisible(true);
}
if (source == eraser)
{ eraser.setBorder(new BevelBorder(BevelBorder.LOWERED));
pencil.setBorder(new BevelBorder(BevelBorder.RAISED));
brush.setBorder(new BevelBorder(BevelBorder.RAISED));
text.setBorder(new BevelBorder(BevelBorder.RAISED));
drawColor = (Color.white);
eraserOn = true;
}
if (source == pencil)
{
eraser.setBorder(new BevelBorder(BevelBorder.RAISED));
pencil.setBorder(new BevelBorder(BevelBorder.LOWERED));
brush.setBorder(new BevelBorder(BevelBorder.RAISED));
text.setBorder(new BevelBorder(BevelBorder.RAISED));
drawColor = (Color.red);
pencilOn = true;
}
if (source == brush)
{ eraser.setBorder(new BevelBorder(BevelBorder.RAISED));
pencil.setBorder(new BevelBorder(BevelBorder.RAISED));
brush.setBorder(new BevelBorder(BevelBorder.LOWERED));
text.setBorder(new BevelBorder(BevelBorder.RAISED));
drawColor = (Color.red);
brushOn = true;
}
if (source == text)
{ eraser.setBorder(new BevelBorder(BevelBorder.RAISED));
pencil.setBorder(new BevelBorder(BevelBorder.RAISED));
brush.setBorder(new BevelBorder(BevelBorder.RAISED));
text.setBorder(new BevelBorder(BevelBorder.LOWERED));
drawColor = (Color.red);
textprompt.setEnabled(true);
textinput.setEditable(true);
textOn = true;
}
if (source == redCrayon)
{ redCrayon.setBorder(new BevelBorder(BevelBorder.LOWERED));
yellowCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
greenCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
blueCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
drawColor = (Color.red);
}
if (source == yellowCrayon)
{ redCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
yellowCrayon.setBorder(new BevelBorder(BevelBorder.LOWERED));
greenCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
blueCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
drawColor = (Color.yellow);
}
if (source == greenCrayon)
{ redCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
yellowCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
greenCrayon.setBorder(new BevelBorder(BevelBorder.LOWERED));
blueCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
drawColor = (Color.green);
}
if (source == blueCrayon)
{
redCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
yellowCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
greenCrayon.setBorder(new BevelBorder(BevelBorder.RAISED));
blueCrayon.setBorder(new BevelBorder(BevelBorder.LOWERED));
drawColor = (Color.blue);
}
}
public void mousePressed(MouseEvent e) {
last_x = e.getX();
last_y = e.getY();
Graphics gr = getGraphics();
if(textOn == true)
{
String s = textinput.getText();
gr.setColor(drawColor);
gr.setFont(font1);
gr.drawString(s, last_x, last_y);
}
}
public void mouseDragged(MouseEvent e)
{
xpos=e.getX();
ypos=e.getY();
Graphics gr = getGraphics();
gr.setColor(drawColor);
gr.drawLine(last_x,last_y,xpos,ypos);
Graphics2D gr2d = (Graphics2D)gr;
BasicStroke drawLine = new BasicStroke(lineWeight, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
gr2d.setStroke(drawLine);
if (eraserOn == true)
{
gr2d.drawLine(last_x, last_y, xpos, ypos);
}
if (brushOn == true)
{
gr2d.drawLine(last_x, last_y, xpos, ypos);
}
gr2d.setStroke(str);
last_x = xpos;
last_y = ypos;
topPanel.repaint();
menuBar.repaint();
eraser.repaint();
pencil.repaint();
brush.repaint();
text.repaint();
stroke.repaint();
sliderbar.repaint();
redCrayon.repaint();
yellowCrayon.repaint();
greenCrayon.repaint();
blueCrayon.repaint();
}
public void mouseMoved(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e){}
public void stateChanged(ChangeEvent e)
{
JSlider source = (JSlider)e.getSource();
value = source.getValue();
if (value==1)
{
lineWeight = 5;
}
if (value==2)
{
lineWeight = 10;
}
if (value==3)
{
lineWeight = 20;
}
}
public static void main(String[] args)
{
PaintApp aFrame = new PaintApp();
Image img = Toolkit.getDefaultToolkit().getImage("IconImage.gif");
aFrame.setIconImage(img);
aFrame.setSize(750,550);
aFrame.setResizable(false);
aFrame.setVisible(true);
aFrame.setLocationRelativeTo(null);
}
}
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