Copy and display a drawing
I made a simple paint program which allows the user to draw in a panel. I want to be able to copy what is drawn onto the panel and display it in another panel when the user clicks a save button. Can I save it as an image somehow and then just display the image? Or, could I serialize the panel object and then display that object?
Thanks for the help
Cheers,
Ryan
Painter Panel:
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.colorchooser.*;
publicclass painterextends JPanelimplements ActionListener, ChangeListener{
private JPanel buttonPanel;
private JList sizeList;
private String drawSize="3";
privateint x, y;
private Color drawColor = Color.BLACK;
privateboolean firstRun =true;
private JColorChooser tcc;
// This array defines the pixel sizes that the paint brush can use.
privatefinal String pixSizes[] ={"1","2","3","4","5","6","7","8",
"9","10","12","15","20","30","40","50"};
// Setup the GUI.
public painter(){
// Listener to detect and log the drag of the mouse.
addMouseMotionListener(
new MouseMotionAdapter(){// anonymous inner class
publicvoid mouseDragged( MouseEvent event )
{
x = event.getX();
y = event.getY();
repaint();
}
}// end anonymous inner class
);// end call to addMouseMotionListener
// Establish the button panel.
buttonPanel =new JPanel();
buttonPanel.setLayout(new GridLayout(1,3) );
JButton colorButton=new JButton("Color");
colorButton.addActionListener(this);
//Set up color chooser for setting draw color
tcc =new JColorChooser();
tcc.getSelectionModel().addChangeListener(this);
tcc.setBorder(BorderFactory.createTitledBorder("Choose Draw Color"));
// This list allows the user to select the pixel size of the brush tool.
sizeList =new JList( pixSizes );
sizeList.setVisibleRowCount( 1 );
sizeList.setSelectionMode( ListSelectionModel.SINGLE_SELECTION );
sizeList.addListSelectionListener(
new ListSelectionListener(){
publicvoid valueChanged( ListSelectionEvent event )
{
drawSize = pixSizes[sizeList.getSelectedIndex()];
}
}
);
// Create the save button which will save whatever has been drawn
// so far and copy it into the display panel.
JButton saveButton =new JButton("Save" );
saveButton.addActionListener(
new ActionListener(){
publicvoid actionPerformed( ActionEvent event )
{
// Don't know what to do here.
}
}
);// End of actionListener definition.
buttonPanel.add( colorButton );
buttonPanel.add(new JScrollPane( sizeList ) );
buttonPanel.add( saveButton );
setLayout(new BorderLayout());
// Add the button panel to the bottom of the container.
add( buttonPanel, BorderLayout.SOUTH );
setSize( 300, 300 );
setVisible(true );
}// End of the constructor.
publicvoid paint( Graphics g )
{
// Set the size of the brush based on the selection from the sizeList.
int pixelSize = Integer.parseInt(drawSize);
// Only clear the paint area if this is the first repaint().
if ( firstRun ==true ){
super.paint( g );
firstRun =false;
}
// Set the color to whatever color is selected with the colors combo
// box.
g.setColor(drawColor);
// Draw the selected shape along all of the points dragged with the
// selected size.
g.fillOval( x, y, pixelSize, pixelSize );
}
publicvoid actionPerformed(ActionEvent e){
Color newColor = JColorChooser.showDialog(
painter.this,
"Choose Draw Color",
drawColor);
if (newColor !=null){
drawColor = newColor;
}
}
publicvoid stateChanged(ChangeEvent e){
drawColor = tcc.getColor();
}
}
