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printing in Java

harbinger072198
on
Medium Priority
236 Views
Last Modified: 2010-03-30
Is there a way to printer print a gif
file in Java? Or am I limited to what is
defined in the paint() method? Also, can
I print the components that is added to the
frame? Can I print anything other than frames?

Thanks for the help.
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I had answered this question earlier , I am repeating the answer hope this helps

Printing a graphics object needs a reference to a "PrintGraphics" object.

Getting a reference to the PrintGraphics can be done by the following steps

1. Obtaining the reference to the Frame
2. Obtaining the refernce to the default toolkit
3.Invoke the toolkit's getPrintJob() method, passing it as a parameter the Frame

4. on the print job object now call the getGraphics() method which returns a reference to the PrintGraphics

You can either pass reference to a PrintGraphics object to a component's print() or printAll() method. Printing the graphics can be done by calling the graphic's dispose() method which flushes it to the printer, after the printing is done call the end() method

//PrintGraphics.java

import java.awt.*;
import java.awt.event.*;
import java.util.Properties;


public class PrintGraphics extends Frame {

Button printButton = new Button ("print ...");
Label printLabel = new Label("print this label");
TextField printTextField =new TextField("print this textfield");
//constructor
PrintGraphics(){
setLayout(new FlowLayout());
add(printButton);
add(printLabel);
add(printTextField);

printButton.addActionListener (new ActionListener() {
    public void actionPerformed(ActionEvent e){
//printApp(Printgraphics.this);
        printApp(printButton);
        printApp(printLabel);
        printApp(printTextField);
    }
});
}

public static void main(String args[]){
PrintGraphics PG = new PrintGraphics() ;
PG.setSize(300,200);
PG.setVisible(true);
}
static Frame getFrame(Component x) {
  while((x= x.getParent()) != null){
      if (x instanceof Frame)
        return (Frame) x;
   }
return null;
}


static void printApp(Component x) {

 Frame frame = getFrame(x);
   
// Frame frame = getFrame(printButton);

 Toolkit tk = Toolkit.getDefaultToolkit();

 if(tk != null) {
   String name = x.getName() + " Print this";

   PrintJob job1 = tk.getPrintJob(frame,name,(Properties) null);

    if(job1 != null) {
      Graphics pg = job1.getGraphics();

       if (pg != null) {
       System.out.println("The component is printed");
        x.printAll(pg);
        pg.dispose();

       pg.drawLine(20,20,60,50);
       pg.dispose();   ///test drawing a line
}

     job1.end();
     }
}
}
}
 


Author

Commented:
I tried it and it didn't work. Arrggghh..
What did not work ? Printing of gifs or any components at all ?
Commented:
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Author

Commented:
Hmm.. Alright thanks. Thanks aziz for the code, I needed some
info on what to expect for printing. Just a beginner! I'll try out your code
in the future.
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