scrollpane

[Randall Twede]

horizontal scrollbar is not being displayed. vertical is.
if i make the frame narrower, the text wraps instead of the scrollbar being displayed.

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*; 
import java.awt.event.*;
import java.awt.print.*; 

public class Example 
{  
    private JFrame frame = new JFrame();
	private JTextPane pane = new JTextPane();
    private JScrollPane scrollPane = new JScrollPane(pane); 
	private	PrinterJob pj = PrinterJob.getPrinterJob();
	private	PageFormat pf = pj.defaultPage();
	
	public Example()
	{	
        frame.setSize(800, 600);  
        frame.setLocationRelativeTo(null);    
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    
        frame.setTitle("Example");
		int w = (int)pf.getWidth();
		int h = (int)pf.getHeight();
		System.out.println(w);
		System.out.println(h);
		Dimension size = new Dimension(w, h);
		pane.setPreferredSize(size);
        pane.setCaretPosition(0);  
        pane.setMargin(new Insets(90,90,90,90));		
        Container c = frame.getContentPane();
		c.add(scrollPane, "Center");
        frame.setVisible(true);
		pane.requestFocusInWindow();
	}
	
    public static void main(String args[])  
    {    
        SwingUtilities.invokeLater(new Runnable()  
        {    
            public void run()  
            {    
                new Example();    
            }    
        });  
    } 
}

[Rob Camick]

c.add(scrollPane, "Center");  

Don't use magic numbers or literals. All classes will have variables defined for use with the methods of the class.

In the case of a BorderLayout you should be using BorderLayout.CENTER.

pane.setPreferredSize(size);  

Don't hardcode the preferred size of a component. The preferred size should be dynamic so the scrollbars can adjust as text is added/removed.

To prevent wrapping check out No Wrap Text Pane.

[Randall Twede]

Don't hardcode the preferred size of a component. The preferred size should be dynamic so the scrollbars can adjust as text is added/removed.

well, the eventual goal is to work sort of like Word or Open Office. if i change the page setup i want what is displayed on the screen to change. for example if i change paper size the words will wrap in a different place.

i also tried setSize(int, int) but that acts the same way.

[Rob Camick]

If you need to manipulate the preferred size to mimic a paper size then is should be done on the scroll pane, not the text pane.

[Randall Twede]

i solved this particular problem, but it creates another.
what i did was set the preferred size of the JTextPane(i also gave it a compound border).
added it to a JPanel with a FlowLayout.
and put the JPanel in the JScrollPane.
it now looks and works almost exactly like other word processors except now it is limited to a single page.
but this is a different problem so i am marking this one resolved.
if you would like to see what it looks like now, here is the code:

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*; 
import java.awt.event.*;
import java.awt.print.*;
import javax.swing.border.*; 

public class Example 
{  
    private JFrame frame = new JFrame();
	private JTextPane pane = new JTextPane();
	private JPanel panel = new JPanel();
    private JScrollPane scrollPane = new JScrollPane(panel); 
	private	PrinterJob pj = PrinterJob.getPrinterJob();
	private	PageFormat pf = pj.defaultPage();
	
	public Example()
	{	
        frame.setSize(800, 600);  
        frame.setLocationRelativeTo(null);    
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    
        frame.setTitle("Example");
		int w = (int)pf.getWidth();
		int h = (int)pf.getHeight();
		System.out.println(w);
		System.out.println(h);
		Dimension size = new Dimension(w, h);
		pane.setPreferredSize(size);
        pane.setCaretPosition(0);  
		Border margin = new EmptyBorder(72, 72, 72, 72);
		Border line = new LineBorder(Color.black);
		CompoundBorder border = new CompoundBorder(margin, line);
		pane.setBorder(border);
		panel.setLayout(new FlowLayout());
		panel.add(pane);		
        Container c = frame.getContentPane();
		c.add(scrollPane, BorderLayout.CENTER);
        frame.setVisible(true);
		pane.requestFocusInWindow();
	}
	
    public static void main(String args[])  
    {    
        SwingUtilities.invokeLater(new Runnable()  
        {    
            public void run()  
            {    
                new Example();    
            }    
        });  
    } 
}

i notice that Wordpad works differently than Open Office. it changes the width when you change the page setup, but it displays no border and it is one continuous piece of text. it does not display the separate pages. it does not even have a print preview. and this is the windows 8 version. duplicating this seems more promising.