JamesCherrill
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6,370 posts since Apr 2008
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JLabel not visible
Hey here's my code for functioning like MS Paint. But JLabels are just not visible. Please Help.
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
public class MSPaint
{
JFrame frame;
JPanel panel;
Painting paint = new Painting();
public MSPaint()
{
frame = new JFrame("MS Paint");
frame.setSize(1024,768);
panel = new JPanel();
frame.getContentPane().add(panel);
panel.setLayout(new BorderLayout());
panel.add(paint);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setVisible(true);
paint.getComponent(0).requestFocus();
}
public void init()
{
}
public static void main(String[] args)
{
MSPaint msp = new MSPaint();
}
}
class Painting extends JPanel implements MouseListener, ActionListener, MouseMotionListener
{
Raster r;
int x1, y1, x2, y2;
boolean point = true, circle, line, rect, start = true;
BufferedImage bf;
JPanel pcen, psouth;
JComboBox drawChooser, colorChooser;
JLabel select, fillLabel, drawLabel, eraserLabel, color;
ButtonGroup group;
JRadioButton fill;
JRadioButton draw;
JRadioButton eraser;
Cursor cursor;
BufferedImage cusrImage;
Painting()
{
super();
this.setLayout(new BorderLayout());
pcen = new JPanel();
pcen.setBackground(Color.WHITE);
setBackground(Color.WHITE);
add(pcen);
psouth= new JPanel();
psouth.setBackground(Color.LIGHT_GRAY);
select = new JLabel("Select");
select.setBackground(Color.RED);
select.setVisible(true);
psouth.add(select);
drawChooser = new JComboBox();
drawChooser.addItem("Point");
drawChooser.addItem("Line");
drawChooser.addItem("Circle");
drawChooser.addItem("Rectangle");
drawChooser.addActionListener(this);
psouth.add(drawChooser);
fillLabel = new JLabel("Fill");
drawLabel = new JLabel("Draw");
eraserLabel = new JLabel("Eraser");
group = new ButtonGroup();
fill = new JRadioButton();
fill.addActionListener(this);
draw = new JRadioButton();
draw.addActionListener(this);
eraser = new JRadioButton();
eraser.addActionListener(this);
draw.setSelected(true);
group.add(draw);
group.add(fill);
group.add(eraser);
psouth.add(drawLabel);
psouth.add(draw);
psouth.add(fillLabel);
psouth.add(fill);
psouth.add(eraserLabel);
psouth.add(eraser);
color = new JLabel("Color");
psouth.add(color);
colorChooser = new JComboBox();
colorChooser.addItem("Black");
colorChooser.addItem("Red");
colorChooser.addItem("Green");
colorChooser.addItem("Blue");
colorChooser.addItem("Yellow");
colorChooser.addItem("Cyan");
colorChooser.addItem("Orange");
colorChooser.addItem("Magenta");
colorChooser.addItem("Gray");
colorChooser.addItem("White");
colorChooser.addActionListener(this);
psouth.add(colorChooser);
psouth.addMouseListener(this);
this.add("South", psouth);
pcen.addMouseListener(this);
pcen.addMouseMotionListener(this);
setSize(1024,768);
bf = new BufferedImage(this.getWidth(),this.getHeight()-35,BufferedImage.TYPE_INT_RGB);
cursor=new Cursor(Cursor.CROSSHAIR_CURSOR);
pcen.setCursor(cursor);
pcen.requestFocus();
validate();
}
public void paint(Graphics g)
{
if(bf.getHeight()!=this.getHeight()-35 || bf.getWidth()!= this.getWidth())
{
r = bf.getData();
bf = new
BufferedImage(this.getWidth(),this.getHeight()-35,BufferedImage.TYPE_INT_RGB);
bf.getGraphics().setColor(Color.WHITE);
bf.getGraphics().fillRect(0, 0, this.getWidth(), this.getWidth());
bf.setData(r);
}
draw(bf.getGraphics());
g.drawImage(bf, 0, 0, null);
}
public Color getColor()
{
Color c = Color.BLACK;
if(colorChooser.getSelectedItem()=="Black")
{
c= Color.BLACK;
return c;
}
if(colorChooser.getSelectedItem()=="Blue")
{
c= Color.BLUE;
return c;
}
if(colorChooser.getSelectedItem()=="Red")
{
c= Color.RED;
return c;
}
if(colorChooser.getSelectedItem()=="Green")
{
c= Color.GREEN;
return c;
}
if(colorChooser.getSelectedItem()=="Yellow")
{
c= Color.YELLOW;
return c;
}
if(colorChooser.getSelectedItem()=="Cyan")
{
c= Color.CYAN;
return c;
}
if(colorChooser.getSelectedItem()=="Orange")
{
c= Color.ORANGE;
return c;
}
if(colorChooser.getSelectedItem()=="Magenta")
{
c= Color.MAGENTA;
return c;
}
if(colorChooser.getSelectedItem()=="Gray")
{
c= Color.GRAY;
return c;
}
if(colorChooser.getSelectedItem()=="White")
{
c= Color.WHITE;
return c;
}
return c;
}
public void draw(Graphics g)
{
if(start)
{
g.setClip(0,0,this.getWidth(),this.getHeight());
g.setColor(Color.WHITE);
g.fillRect(0, 0, this.getWidth(), this.getWidth());
}
if(!point && !eraser.isSelected() && !start)
{
g.setColor(Color.WHITE);
g.fillRect(0, 0, this.getWidth(), this.getWidth());
bf.setData(r);
}
else
{
r = bf.getData();
}
start = false;
g.setColor(getColor());
if(draw.isSelected())
{
if(circle)
{
if(x1<x2 && y1<y2)
{
g.drawOval(x1, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if(x1>x2 && y1> y2)
{
g.drawOval(x2, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1<y2)
{
g.drawOval(x2, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1>y2)
{
g.drawOval(x1, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
}
else if(rect)
{
if(x1<x2 && y1<y2)
{
g.drawRect(x1, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if(x1>x2 && y1> y2)
{
g.drawRect(x2, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1<y2)
{
g.drawRect(x2, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1>y2)
{
g.drawRect(x1, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
}
else
{
g.drawLine(x1,y1, x2,y2 );
}
}
else if(fill.isSelected())
{
if(circle)
{
if(x1<x2 && y1<y2)
{
g.fillOval(x1, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if(x1>x2 && y1> y2)
{
g.fillOval(x2, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1<y2)
{
g.fillOval(x2, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1>y2)
{
g.fillOval(x1, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
}
else if(rect){
if(x1<x2 && y1<y2)
{
g.fillRect(x1, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if(x1>x2 && y1> y2)
{
g.fillRect(x2, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1<y2)
{
g.fillRect(x2, y1, Math.abs(x2-x1), Math.abs(y2-y1));
}
else if (y1>y2)
{
g.fillRect(x1, y2, Math.abs(x2-x1), Math.abs(y2-y1));
}
}
else
{
g.drawLine(x1,y1, x2,y2 );
}
}
else if(eraser.isSelected())
{
g.setColor(Color.WHITE);
g.fillRect(x2-15,y2-15,30,30);
}
if(point)
{
x1=x2;
y1=y2;
}
try
{
Thread.sleep(5);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
public void mouseDragged(MouseEvent me)
{
x2=me.getX();
y2= me.getY();
paint(pcen.getGraphics());
}
public void mousePressed(MouseEvent me)
{
x1=me.getX();
y1= me.getY();
x2=x1;
y2=y1;
paint(pcen.getGraphics());
}
public void mouseReleased(MouseEvent e)
{
if(!point)
{
r = bf.getData();
}
}
public void mouseEntered(MouseEvent me)
{
if(me.getSource()==psouth)
{
this.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
}
if(me.getSource()==pcen)
{
pcen.setCursor(cursor);
}
}
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==drawChooser)
{
if(drawChooser.getSelectedItem()=="Point")
{
line=false;
point=true;
circle=false;
rect=false;
}
if(drawChooser.getSelectedItem()=="Circle")
{
line=false;
circle=true;
point=false;
rect=false;
}
if(drawChooser.getSelectedItem()=="Line")
{
line=true;
rect=false;
circle=false;
point=false;
}
if(drawChooser.getSelectedItem()=="Rectangle")
{
rect=true;
line=false;
circle=false;
point=false;
}
}
if(ae.getSource()==eraser)
{
cusrImage = new BufferedImage(30,30,BufferedImage.TYPE_INT_RGB);
cusrImage.getGraphics().drawRect(0, 0, 30, 30);
Toolkit t = Toolkit.getDefaultToolkit();
cursor = t.createCustomCursor(cusrImage, new Point(15,15), "mycursor");
}
if(ae.getSource()==fill)
{
cursor = new Cursor( Cursor.CROSSHAIR_CURSOR);
}
if(ae.getSource()==draw)
{
cursor = new Cursor( Cursor.CROSSHAIR_CURSOR);
}
pcen.requestFocus();
}
//remaining Mouse Listener Method
public void mouseClicked(MouseEvent e) {}
public void mouseExited(MouseEvent me) {}
public void mouseMoved(MouseEvent e) {}
}Yes dat was exactly the problem. I never knew paintComponent ever existed. Now I will try to explore and learn it. Thanks a lot James!!
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