Solved

printing?

Posted on 1998-07-24
2
234 Views
Last Modified: 2010-03-30
I had a textarea, and there were different font and style inside. I want to know how can I draw it as graphics to be printed out by using java.
0
Comment
Question by:mscproj
2 Comments
 
LVL 1

Expert Comment

by:dryang
ID: 1228136
here's a suggestion to get your mind moving. Try messing around the Canvas API in java.awt.Canvas*; This neat 'component' allow you to trap all sorts of event and put all sorts of stuff in.

be warned, it will take a bit of time to get the hang of it.


0
 
LVL 2

Accepted Solution

by:
aziz061097 earned 50 total points
ID: 1228137

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();
     }
}
}
}
 

0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question