Images

[Richard West]

Hi everyone,

I have a bit of a problem converting a JTextPane to an image.
I am able to convert the JTextPane to a PNG image but its quality is really bad. Is there a way that i can convert my JTextPane to a high quality image.

The type of image format does not matter

Here is what i have so far

 
public void export(JComponent Component) 
{
 
  File f1 = new File("C:\\Temp.PNG");
  Dimension Size5 = Component.getSize();  
  BufferedImage Image1 = new BufferedImage(Size5.width, Size5.height,  BufferedImage.TYPE_INT_ARGB);
  Graphics2D g2 = Image1.createGraphics();
  g2.setRenderingHint (RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BICUBIC);
  Component.paint(g2);
 
try
{
     ImageIO.write(Image1, "PNG", f1);
}
 
catch (Exception e)
{
     e.printStackTrace();
}
 
}
 

I hope someone can help with this problem

Any help is greatly appreciated

Thank You

Yours Sincerely

Richard West

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.text.*;
 
public class ExportTest
{
    public ExportTest()
    {
        JTextPane textPane = new JTextPane();
        StyledDocument doc = textPane.getStyledDocument();
        initStyles(doc);
        initDoc(doc);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(getUIPanel(textPane), "North");
        f.getContentPane().add(new JScrollPane(textPane));
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    /**
     * copied from TextSamplerDemo in java tutorial
     */
    private void initStyles(StyledDocument doc)
    {
        Style def = StyleContext.getDefaultStyleContext().getStyle(
                                         StyleContext.DEFAULT_STYLE);
        Style regular = doc.addStyle("regular", def);
        StyleConstants.setFontSize(def, 18);
 
        Style s = doc.addStyle("large", regular);
        StyleConstants.setFontSize(s, 22);
 
        s = doc.addStyle("italic", regular);
        StyleConstants.setItalic(s, true);
 
        s = doc.addStyle("pink", regular);
        StyleConstants.setBackground(s, Color.pink);
 
        s = doc.addStyle("underline", regular);
        StyleConstants.setUnderline(s, true);
 
        s = doc.addStyle("sansSerif", regular);
        StyleConstants.setFontFamily(s, "lucida sans demibold");
 
        s = doc.addStyle("red", regular);
        StyleConstants.setForeground(s, Color.red);
    }
 
    /**
     * copied from TextSamplerDemo in java tutorial
     */
    private void initDoc(StyledDocument doc)
    {
        String[] textData = {
            "A text component that can be marked up with attributes that " +
            "are represented graphically. ",
            "You can find how-to information and examples of using text " +
            "panes in Using Text Components, a section in The Java Tutorial.\n",
            "This component models paragraphs that are composed of runs " +
            "of character level attributes.",
            " ",
            "Each paragraph may have a logical style attached to it which " +
            "contains the default attributes to use",
            " if not overridden by attributes set on the paragraph or " +
            "character run. ",
            "Components and images may be embedded in the flow of text."
        };
        String[] styles = {
            "large", "italic", "pink", "regular", "underline", "sansSerif", "red"
        };
        try
        {
            for(int j = 0; j < textData.length; j++)
                doc.insertString(doc.getLength(), textData[j],
                                 doc.getStyle(styles[j]));
        }
        catch(BadLocationException ble)
        {
            System.err.println("initDoc: " + ble.getMessage());
        }
    }
 
    private JPanel getUIPanel(final JTextPane textPane)
    {
        JButton save = new JButton("save");
        save.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                export(textPane);
            }
        });
        JPanel panel = new JPanel();
        panel.add(save);
        return panel;
    }
 
    private void export(Component c)
    {
        File file = new File("c:/jexp/textPane.png");
        Dimension d = c.getSize();
        BufferedImage image = new BufferedImage(d.width, d.height,
                                          BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        c.paint(g2);
        g2.dispose();
        try
        {
            ImageIO.write(image, "png", file);
        }
        catch(IOException ioe)
        {
            System.err.println("image write: " + ioe.getMessage());
        }
    }
 
    public static void main(String[] args)
    {
        new ExportTest();
    }
}