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| public class PrintPreview extends JDialog implements Runnable
{
protected JScrollPane displayArea;
protected int m_wPage;
protected int m_hPage;
protected int width;
protected int height;
protected Printable m_target;
protected JComboBox m_cbScale;
protected PreviewContainer m_preview;
protected PageFormat pp_pf = null;
protected JButton formatButton;
protected JButton shrinkButton;
@SuppressWarnings("unused")
private static final int INCH = 72;
private static boolean bScallToFitOnePage = false;
private String msg;
JTable table;
protected void getThePreviewPages()
{
m_wPage = (int)(pp_pf.getWidth());
m_hPage = (int)(pp_pf.getHeight());
int scale = getDisplayScale();
width = (int)Math.ceil(m_wPage*scale/100);
height = (int)Math.ceil(m_hPage*scale/100);
int pageIndex = 0;
try {
while (true) {
BufferedImage img = new BufferedImage(m_wPage, m_hPage,
BufferedImage.TYPE_INT_RGB);
Graphics g = img.getGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, m_wPage, m_hPage);
if (bScallToFitOnePage) {
m_target.print(g, pp_pf, -1);
PagePreview pp = new PagePreview(width, height, img);
m_preview.add(pp);
break;
} else
if (m_target.print(g, pp_pf, pageIndex) != Printable.PAGE_EXISTS)
break;
PagePreview pp = new PagePreview(width, height, img);
m_preview.add(pp);
pageIndex++;
}
} catch (OutOfMemoryError om) {
JOptionPane.showMessageDialog(this,
"image is too big that run out of memory.", "Print Preview",
JOptionPane.INFORMATION_MESSAGE);
}
catch (PrinterException e) {
e.printStackTrace();
System.err.println("Printing error: "+e.toString());
}
}
protected void previewThePages(int orientation)
{
if (displayArea != null) displayArea.setVisible(false);
m_preview = new PreviewContainer();
getThePreviewPages();
displayArea = new JScrollPane(m_preview);
getContentPane().add(displayArea, BorderLayout.CENTER);
setLocationRelativeTo(null);
setVisible(true);
System.gc();
}
protected void createButtons(JToolBar tb, boolean shrink) {
JButton bt = new JButton("Print", new ImageIcon("print.gif"));
ActionListener lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
MessageFormat header = null;
MessageFormat footer = null;
footer = new MessageFormat("Page {0}");
boolean fitWidth = true;
boolean showPrintDialog = true;
boolean interactive = true;
JTable.PrintMode mode = fitWidth ? JTable.PrintMode.FIT_WIDTH
: JTable.PrintMode.NORMAL;
@SuppressWarnings("unused")
boolean complete=false;
header = new MessageFormat(""+msg);
complete = table.print(mode, header, footer,
showPrintDialog, null,
interactive, null);
/*/ PrinterJob prnJob = PrinterJob.getPrinterJob();
prnJob.setPrintable(m_target, pp_pf);
if (prnJob.printDialog()) {
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
prnJob.print();
setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}*/
dispose();
}
catch (PrinterException ex) {
ex.printStackTrace();
System.err.println("Printing error: "+ex.toString());
}
}
};
bt.addActionListener(lst);
bt.setAlignmentY(0.5f);
bt.setMargin(new Insets(4,6,4,6));
tb.add(bt);
if (pp_pf.getOrientation() == PageFormat.PORTRAIT)
formatButton = new JButton("Landscape");
else
formatButton = new JButton("Portrait");
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (pp_pf.getOrientation() == PageFormat.PORTRAIT) {
pp_pf.setOrientation(PageFormat.LANDSCAPE);
previewThePages(PageFormat.LANDSCAPE);
formatButton.setText("Portrait");
} else {
pp_pf.setOrientation(PageFormat.PORTRAIT);
previewThePages(PageFormat.PORTRAIT);
formatButton.setText("Landscape");
}
}
};
formatButton.addActionListener(lst);
formatButton.setAlignmentY(0.5f);
formatButton.setMargin(new Insets(4,6,4,6));
tb.add(formatButton);
if (shrink) {
shrinkButton = new JButton("Shrink to fit");
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
bScallToFitOnePage = !bScallToFitOnePage;
previewThePages(pp_pf.getOrientation());
}
};
shrinkButton.addActionListener(lst);
shrinkButton.setAlignmentY(0.5f);
shrinkButton.setMargin(new Insets(4,6,4,6));
tb.add(shrinkButton);
}
bt = new JButton("Close");
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
dispose();
}
};
bt.addActionListener(lst);
bt.setAlignmentY(0.5f);
bt.setMargin(new Insets(4,6,4,6));
tb.add(bt);
}
public int getDisplayScale() {
String str = m_cbScale.getSelectedItem().toString();
if (str.endsWith("%")) str = str.substring(0, str.length()-1);
str = str.trim();
int scale = 0;
try { scale = Integer.parseInt(str); }
catch (NumberFormatException ex) { return 25; }
return scale ;
}
public PrintPreview(Printable target,JTable table2,String Message) {
this(target, "Print Preview", false, table2,Message);
}
public PrintPreview(Printable target, String title,JTable table2,String Message) {
this(target, title, false, table2, Message);
}
public PrintPreview(Printable target, String title, boolean shrink,JTable table2,String Message) {
setTitle(title);
table=table2;
msg=Message;
setIconImage( new ImageIcon( "teloptica.gif" ).getImage() );
bScallToFitOnePage = false; // reset to default
PrinterJob prnJob = PrinterJob.getPrinterJob();
pp_pf = prnJob.defaultPage();
if (pp_pf.getHeight()==0 || pp_pf.getWidth()==0) {
System.err.println("Unable to determine default page size");
return;
}
setSize(670, 750);
m_target = target;
displayArea = null;
m_preview = null;
JToolBar tb = new JToolBar();
createButtons(tb, shrink);
String[] scales = { "10 %", "25 %", "50 %", "100 %" };
m_cbScale = new JComboBox(scales);
m_cbScale.setSelectedIndex(3);
ActionListener lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
Thread runner = new Thread(PrintPreview.this);
runner.start();
}
};
m_cbScale.addActionListener(lst);
m_cbScale.setMaximumSize(m_cbScale.getPreferredSize());
m_cbScale.setEditable(true);
tb.addSeparator();
tb.add(m_cbScale);
getContentPane().add(tb, BorderLayout.NORTH);
// previewThePages(PageFormat.PORTRAIT);
previewThePages(pp_pf.getOrientation());
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setResizable(false);
setModal(true);
setVisible(true);
}
public void run() {
int scale = getDisplayScale();
width = (int)(m_wPage*scale/100);
height = (int)(m_hPage*scale/100);
Component[] comps = m_preview.getComponents();
for (int k=0; k<comps.length; k++) {
if (!(comps[k] instanceof PagePreview))
continue;
PagePreview pp = (PagePreview)comps[k];
pp.setScaledSize(width, height);
}
m_preview.doLayout();
m_preview.getParent().getParent().validate();
}
class PreviewContainer extends JPanel
{
protected int H_GAP = 16;
protected int V_GAP = 10;
public Dimension getPreferredSize() {
int n = getComponentCount();
if (n == 0)
return new Dimension(H_GAP, V_GAP);
Component comp = getComponent(0);
Dimension dc = comp.getPreferredSize();
int w = dc.width;
int h = dc.height;
Dimension dp = getParent().getSize();
int nCol = Math.max((dp.width-H_GAP)/(w+H_GAP), 1);
int nRow = n/nCol;
if (nRow*nCol < n)
nRow++;
int ww = nCol*(w+H_GAP) + H_GAP;
int hh = nRow*(h+V_GAP) + V_GAP;
Insets ins = getInsets();
return new Dimension(ww+ins.left+ins.right,
hh+ins.top+ins.bottom);
}
public Dimension getMaximumSize() {
return getPreferredSize();
}
public Dimension getMinimumSize() {
return getPreferredSize();
}
public void doLayout() {
Insets ins = getInsets();
int x = ins.left + H_GAP;
int y = ins.top + V_GAP;
int n = getComponentCount();
if (n == 0)
return;
Component comp = getComponent(0);
Dimension dc = comp.getPreferredSize();
int w = dc.width;
int h = dc.height;
Dimension dp = getParent().getSize();
int nCol = Math.max((dp.width-H_GAP)/(w+H_GAP), 1);
int nRow = n/nCol;
if (nRow*nCol < n)
nRow++;
int index = 0;
for (int k = 0; k<nRow; k++) {
for (int m = 0; m<nCol; m++) {
if (index >= n)
return;
comp = getComponent(index++);
comp.setBounds(x, y, w, h);
x += w+H_GAP;
}
y += h+V_GAP;
x = ins.left + H_GAP;
}
}
}
class PagePreview extends JPanel
{
protected int m_w;
protected int m_h;
protected Image m_source;
protected Image m_img;
public PagePreview(int w, int h, Image source) {
m_w = w;
m_h = h;
m_source= source;
m_img = m_source.getScaledInstance(m_w, m_h, Image.SCALE_SMOOTH);
m_img.flush();
setBackground(Color.white);
setBorder(new MatteBorder(1, 1, 2, 2, Color.black));
}
public void setScaledSize(int w, int h) {
m_w = w;
m_h = h;
m_img = m_source.getScaledInstance(m_w, m_h, Image.SCALE_SMOOTH);
repaint();
}
public Dimension getPreferredSize() {
Insets ins = getInsets();
return new Dimension(m_w+ins.left+ins.right, m_h+ins.top+ins.bottom);
}
public Dimension getMaximumSize() {
return getPreferredSize();
}
public Dimension getMinimumSize() {
return getPreferredSize();
}
public void paint(Graphics g) {
g.setColor(getBackground());
g.fillRect(0, 0, getWidth(), getHeight());
g.drawImage(m_img, 0, 0, this);
paintBorder(g);
}
}
} |
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