设置jLabel的打印尺寸并在打印件上放置jRadiobutton
我有一个带有图标的jLabel，我应该打印。 但是，我无法将jLabel的图标变成完整的大小。
以下是一些我认为影响打印尺寸的代码。
public static void printComponentToFile(Component comp, boolean fill) throws PrinterException { Paper paper = new Paper(); paper.setSize(8.3 * 72, 11.7 * 72); //here paper.setImageableArea(18, 18, 100, 300); //and here PageFormat pf = new PageFormat(); pf.setPaper(paper); pf.setOrientation(PageFormat.LANDSCAPE); BufferedImage img = new BufferedImage( (int) Math.round(pf.getWidth()), (int) Math.round(pf.getHeight()), BufferedImage.TYPE_INT_RGB); Graphics2D g2d = img.createGraphics(); g2d.setColor(Color.WHITE); g2d.fill(new Rectangle(0, 0, img.getWidth(), img.getHeight())); ComponentPrinter cp = new ComponentPrinter(comp, fill); try { cp.print(g2d, pf, 0); } finally { g2d.dispose(); } try { ImageIO.write(img, "png", new File("Page-" + (fill ? "Filled" : "") + ".png")); } catch (IOException ex) { ex.printStackTrace(); } } public static class ComponentPrinter implements Printable { private Component comp; private boolean fill; public ComponentPrinter(Component comp, boolean fill) { this.comp = comp; this.fill = fill; } @Override public int print(Graphics g, PageFormat format, int page_index) throws PrinterException { if (page_index > 0) { return Printable.NO_SUCH_PAGE; } Graphics2D g2 = (Graphics2D) g; g2.translate(format.getImageableX(), format.getImageableY()); double width = (int) Math.floor(format.getImageableWidth()); // here too double height = (int) Math.floor(format.getImageableHeight()); // and here if (!fill) { width = Math.min(width, comp.getPreferredSize().width); // here height = Math.min(height, comp.getPreferredSize().height); // here } comp.setBounds(0, 0, (int) Math.floor(width), (int) Math.floor(height)); if (comp.getParent() == null) { comp.addNotify(); } comp.validate(); comp.doLayout(); comp.printAll(g2); if (comp.getParent() != null) { comp.removeNotify(); } return Printable.PAGE_EXISTS; } } 那么我应该怎样改变呢？ 另外，如何在打印过程中放置一个单选button？ 这是因为我想用标签完全打印单选button。
这是我如何使用button打印标签：
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { try { printComponent(jLabel2, false); } catch (PrinterException ex) { Logger.getLogger(MappingScreen.class.getName()).log(Level.SEVERE, null, ex); } }
我可以这样做吗？
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { try { printComponent(jLabel2, false); printComponent(jRadioBtn1, false); //change } catch (PrinterException ex) { Logger.getLogger(M.class.getName()).log(Level.SEVERE, null, ex); } }
更新：
我想我必须在这里添加一些东西来打印另一个组件：
public static void main(String args[]) { try { JLabel label = new JLabel( "This is a test", new ImageIcon("/adv/mapp.jpg"), JLabel.CENTER); printComponentToFile(label, true); printComponentToFile(label, false); } catch (PrinterException exp) { exp.printStackTrace(); }
请帮忙。 谢谢
所以，基于打印JFrame及其组件的概念，我已经能够生成这两个例子…
其中使用了以下JPanel作为基本组件…
public static class PrintForm extends JPanel { public PrintForm() { setLayout(new GridBagLayout()); JLabel label = new JLabel("This is a label"); label.setVerticalTextPosition(JLabel.BOTTOM); label.setHorizontalTextPosition(JLabel.CENTER); try { label.setIcon(new ImageIcon(ImageIO.read(new File("C:\\hold\\thumbnails\\_cg_1009___Afraid___by_Serena_Clearwater.png")))); } catch (IOException ex) { ex.printStackTrace(); } GridBagConstraints gbc = new GridBagConstraints(); gbc.gridx = 0; gbc.gridy = 0; gbc.weightx = 1; gbc.weighty = 1; add(label, gbc); JRadioButton rb = new JRadioButton("Open to suggestions"); rb.setSelected(true); gbc.gridy++; gbc.weightx = 1; gbc.fill = GridBagConstraints.NONE; add(rb, gbc); } }
基于Fit / Scale JComponent中打印页面的概念，我可以将7680×4800的图像缩小到842×598。
现在注意。 JLabel不支持缩放。 如果你的图像不适合可用的空间，你将不得不自己缩放一些方法。 下面的解决scheme扩展了整个组件，只要有一点聪明的重新安排，就可以使TestPane缩放它的图像，而不是使用上面的例子。
import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.AffineTransform; import java.awt.image.BufferedImage; import java.awt.print.PageFormat; import java.awt.print.Paper; import java.awt.print.Printable; import java.awt.print.PrinterException; import java.awt.print.PrinterJob; import java.io.File; import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; import javax.imageio.ImageIO; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class ScalablePrintingTest { public static void main(String[] args) { new ScalablePrintingTest(); } public ScalablePrintingTest() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } final TestPane imagePane = new TestPane(); JButton print = new JButton("Print"); print.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { try { //printComponent(imagePane); printComponentToFile(imagePane); } catch (PrinterException ex) { ex.printStackTrace(); } } }); JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(imagePane); frame.add(print, BorderLayout.SOUTH); frame.setSize(200, 200); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { private BufferedImage bg; public TestPane() { try { bg = ImageIO.read(new File("/path/to/a/image")); } catch (IOException ex) { ex.printStackTrace(); } } @Override public Dimension getPreferredSize() { return bg == null ? new Dimension(200, 200) : new Dimension(bg.getWidth(), bg.getHeight()); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); if (bg != null) { int x = (getWidth() - bg.getWidth()) / 2; int y = (getHeight() - bg.getHeight()) / 2; g2d.drawImage(bg, x, y, this); } g2d.dispose(); } } public void printComponent(Component comp) { PrinterJob pj = PrinterJob.getPrinterJob(); pj.setJobName(" Print Component "); pj.setPrintable(new ComponentPrintable(comp)); if (!pj.printDialog()) { return; } try { pj.print(); } catch (PrinterException ex) { System.out.println(ex); } } public static void printComponentToFile(Component comp) throws PrinterException { Paper paper = new Paper(); paper.setSize(8.3 * 72, 11.7 * 72); paper.setImageableArea(18, 18, 559, 783); PageFormat pf = new PageFormat(); pf.setPaper(paper); pf.setOrientation(PageFormat.LANDSCAPE); BufferedImage img = new BufferedImage( (int) Math.round(pf.getWidth()), (int) Math.round(pf.getHeight()), BufferedImage.TYPE_INT_RGB); Graphics2D g2d = img.createGraphics(); g2d.setColor(Color.WHITE); g2d.fill(new Rectangle(0, 0, img.getWidth(), img.getHeight())); ComponentPrintable cp = new ComponentPrintable(comp); try { cp.print(g2d, pf, 0); } finally { g2d.dispose(); } try { ImageIO.write(img, "png", new File("Page-Scaled.png")); } catch (IOException ex) { ex.printStackTrace(); } } public static class ComponentPrintable implements Printable { private Component comp; private ComponentPrintable(Component comp) { this.comp = comp; } @Override public int print(Graphics g, PageFormat pf, int pageNumber) throws PrinterException { // TODO Auto-generated method stub if (pageNumber > 0) { return Printable.NO_SUCH_PAGE; } // Get the preferred size ofthe component... Dimension compSize = comp.getPreferredSize(); // Make sure we size to the preferred size comp.setSize(compSize); // Get the the print size Dimension printSize = new Dimension(); printSize.setSize(pf.getImageableWidth(), pf.getImageableHeight()); // Calculate the scale factor double scaleFactor = getScaleFactorToFit(compSize, printSize); // Don't want to scale up, only want to scale down if (scaleFactor > 1d) { scaleFactor = 1d; } // Calcaulte the scaled size... double scaleWidth = compSize.width * scaleFactor; double scaleHeight = compSize.height * scaleFactor; // Create a clone of the graphics context. This allows us to manipulate // the graphics context without begin worried about what effects // it might have once we're finished Graphics2D g2 = (Graphics2D) g.create(); // Calculate the x/y position of the component, this will center // the result on the page if it can double x = ((pf.getImageableWidth() - scaleWidth) / 2d) + pf.getImageableX(); double y = ((pf.getImageableHeight() - scaleHeight) / 2d) + pf.getImageableY(); // Create a new AffineTransformation AffineTransform at = new AffineTransform(); // Translate the offset to out "center" of page at.translate(x, y); // Set the scaling at.scale(scaleFactor, scaleFactor); // Apply the transformation g2.transform(at); // Print the component comp.printAll(g2); // Dispose of the graphics context, freeing up memory and discarding // our changes g2.dispose(); comp.revalidate(); return Printable.PAGE_EXISTS; } } public static double getScaleFactorToFit(Dimension original, Dimension toFit) { double dScale = 1d; if (original != null && toFit != null) { double dScaleWidth = getScaleFactor(original.width, toFit.width); double dScaleHeight = getScaleFactor(original.height, toFit.height); dScale = Math.min(dScaleHeight, dScaleWidth); } return dScale; } public static double getScaleFactor(int iMasterSize, int iTargetSize) { double dScale = 1; if (iMasterSize > iTargetSize) { dScale = (double) iTargetSize / (double) iMasterSize; } else { dScale = (double) iTargetSize / (double) iMasterSize; } return dScale; } }
我正在更新我以前的答案，但已被接受…
这个例子基本上将Fit / Scale JComponent中呈现的解决scheme与打印的 页面以及打印JFrame及其组件的解决scheme相结合，并展示了缩放打印成组件时的不同之处，以使组件能够缩放自身…
它创build了一个Printable的interface链，我希望这将有助于消除任何混淆…好吧，那么有…
所以从…开始
左侧的面板是静态的，也就是说，图像不会被组件缩放。 右侧的面板是dynamic的，也就是说，组件的大小随着组件大小的变化而变化。
使用缩放方法打印时的静态面板。 你会注意到，标签和单选button也被缩放
与使用填充方法时的dynamic面板相比。 你会注意到，标签和单选button没有缩放，但保持在正常的大小，但背景图像被缩放，而不是…
import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.GridLayout; import java.awt.Image; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.AffineTransform; import java.awt.image.BufferedImage; import java.awt.print.PageFormat; import java.awt.print.Paper; import java.awt.print.Printable; import java.awt.print.PrinterException; import java.awt.print.PrinterJob; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JScrollPane; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class PrintComponentTest { public static void main(String[] args) { new PrintComponentTest(); } public PrintComponentTest() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { private StaticImagePane staticImagePane; private DynamicImagePane dynamicImagePane; public TestPane() { JPanel content = new JPanel(new GridLayout()); content.add(new JScrollPane(preparePane(staticImagePane = new StaticImagePane()))); content.add(preparePane(dynamicImagePane = new DynamicImagePane())); setLayout(new BorderLayout()); add(content); JPanel options = new JPanel(); JButton normal = new JButton("Print"); normal.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { try { printComponentToFile(new FillableCompentPrintable(staticImagePane, false), new File("Static-Normal.png")); printComponentToFile(new FillableCompentPrintable(staticImagePane, true), new File("Static-Filled.png")); printComponentToFile(new ScalableCompentPrintable(staticImagePane), new File("Static-Scaled.png")); printComponentToFile(new FillableCompentPrintable(dynamicImagePane, false), new File("Dynamic-Normal.png")); printComponentToFile(new FillableCompentPrintable(dynamicImagePane, true), new File("Dynamic-Filled.png")); printComponentToFile(new ScalableCompentPrintable(dynamicImagePane), new File("Dynamic-Scaled.png")); staticImagePane.invalidate(); dynamicImagePane.invalidate(); staticImagePane.revalidate(); dynamicImagePane.revalidate(); invalidate(); revalidate(); } catch (PrinterException ex) { ex.printStackTrace(); } } }); options.add(normal); add(options, BorderLayout.SOUTH); } protected JPanel preparePane(JPanel panel) { panel.setLayout(new GridBagLayout()); GridBagConstraints gbc = new GridBagConstraints(); gbc.gridwidth = GridBagConstraints.REMAINDER; JLabel label = new JLabel("This is some text on a label"); label.setForeground(Color.WHITE); panel.add(label, gbc); JRadioButton btn = new JRadioButton("Do you agree", true); btn.setOpaque(false); btn.setForeground(Color.WHITE); panel.add(btn, gbc); return panel; } } public void printComponent(ComponentPrintable printable) { PrinterJob pj = PrinterJob.getPrinterJob(); pj.setJobName(" Print Component "); pj.setPrintable(printable); if (!pj.printDialog()) { return; } try { pj.print(); } catch (PrinterException ex) { System.out.println(ex); } } public static void printComponentToFile(ComponentPrintable printable, File file) throws PrinterException { Paper paper = new Paper(); paper.setSize(8.3 * 72, 11.7 * 72); paper.setImageableArea(18, 18, 559, 783); PageFormat pf = new PageFormat(); pf.setPaper(paper); pf.setOrientation(PageFormat.LANDSCAPE); BufferedImage img = new BufferedImage( (int) Math.round(pf.getWidth()), (int) Math.round(pf.getHeight()), BufferedImage.TYPE_INT_RGB); Graphics2D g2d = img.createGraphics(); g2d.setColor(Color.WHITE); g2d.fill(new Rectangle(0, 0, img.getWidth(), img.getHeight())); try { printable.print(g2d, pf, 0); } finally { g2d.dispose(); } try { ImageIO.write(img, "png", file); } catch (IOException ex) { ex.printStackTrace(); } } public static interface ComponentPrintable extends Printable { public Component getComponent(); } public abstract static class AbstractComponentPrintable implements ComponentPrintable { private final Component component; public AbstractComponentPrintable(Component component) { this.component = component; } @Override public Component getComponent() { return component; } protected void beforePrinting(Component comp) { if (comp.getParent() == null) { comp.addNotify(); } comp.invalidate(); comp.revalidate(); comp.doLayout(); } protected void afterPrinting(Component comp) { if (comp.getParent() != null) { comp.removeNotify(); } else { comp.invalidate(); comp.revalidate(); } } @Override public int print(Graphics g, PageFormat format, int page_index) throws PrinterException { if (page_index > 0) { return Printable.NO_SUCH_PAGE; } Graphics2D g2 = (Graphics2D) g; printComponent(g2, format, getComponent()); return Printable.PAGE_EXISTS; } protected abstract void printComponent(Graphics2D g, PageFormat pf, Component comp); } public static class FillableCompentPrintable extends AbstractComponentPrintable { private boolean fill; public FillableCompentPrintable(Component component, boolean fill) { super(component); this.fill = fill; } public boolean isFill() { return fill; } @Override protected void printComponent(Graphics2D g2, PageFormat pf, Component comp) { g2.translate(pf.getImageableX(), pf.getImageableY()); double width = (int) Math.floor(pf.getImageableWidth()); double height = (int) Math.floor(pf.getImageableHeight()); if (!isFill()) { width = Math.min(width, comp.getPreferredSize().width); height = Math.min(height, comp.getPreferredSize().height); } comp.setBounds(0, 0, (int) Math.floor(width), (int) Math.floor(height)); beforePrinting(comp); comp.printAll(g2); afterPrinting(comp); // Debug purposes only... g2.translate(-pf.getImageableX(), -pf.getImageableY()); g2.setColor(Color.RED); g2.drawRect(0, 0, (int) pf.getWidth() - 1, (int) pf.getHeight() - 1); } } public static class ScalableCompentPrintable extends AbstractComponentPrintable { public ScalableCompentPrintable(Component component) { super(component); } @Override protected void printComponent(Graphics2D g2d, PageFormat pf, Component comp) { // Get the preferred size ofthe component... Dimension compSize = comp.getPreferredSize(); // Make sure we size to the preferred size comp.setSize(compSize); // Get the the print size Dimension printSize = new Dimension(); printSize.setSize(pf.getImageableWidth(), pf.getImageableHeight()); // Calculate the scale factor double scaleFactor = getScaleFactorToFit(compSize, printSize); // Don't want to scale up, only want to scale down if (scaleFactor > 1d) { scaleFactor = 1d; } // Calcaulte the scaled size... double scaleWidth = compSize.width * scaleFactor; double scaleHeight = compSize.height * scaleFactor; // Create a clone of the graphics context. This allows us to manipulate // the graphics context without begin worried about what effects // it might have once we're finished Graphics2D g2 = (Graphics2D) g2d.create(); // Calculate the x/y position of the component, this will center // the result on the page if it can double x = ((pf.getImageableWidth() - scaleWidth) / 2d) + pf.getImageableX(); double y = ((pf.getImageableHeight() - scaleHeight) / 2d) + pf.getImageableY(); // Create a new AffineTransformation AffineTransform at = new AffineTransform(); // Translate the offset to out "center" of page at.translate(x, y); // Set the scaling at.scale(scaleFactor, scaleFactor); // Apply the transformation g2.transform(at); // Print the component beforePrinting(comp); comp.printAll(g2); afterPrinting(comp); // Dispose of the graphics context, freeing up memory and discarding // our changes g2.dispose(); // Debug purposes only... g2d.setColor(Color.RED); g2d.drawRect(0, 0, (int) pf.getWidth() - 1, (int) pf.getHeight() - 1); } public static double getScaleFactorToFit(Dimension original, Dimension toFit) { double dScale = 1d; if (original != null && toFit != null) { double dScaleWidth = getScaleFactor(original.width, toFit.width); double dScaleHeight = getScaleFactor(original.height, toFit.height); dScale = Math.min(dScaleHeight, dScaleWidth); } return dScale; } public static double getScaleFactor(int iMasterSize, int iTargetSize) { double dScale = 1; if (iMasterSize > iTargetSize) { dScale = (double) iTargetSize / (double) iMasterSize; } else { dScale = (double) iTargetSize / (double) iMasterSize; } return dScale; } } public class StaticImagePane extends JPanel { private BufferedImage image; public StaticImagePane() { try { setImage(ImageIO.read(new File("path\to\a\image"))); } catch (IOException ex) { ex.printStackTrace(); } } public BufferedImage getImage() { return image; } public void setImage(BufferedImage image) { this.image = image; repaint(); } @Override public Dimension getPreferredSize() { BufferedImage bg = getImage(); return bg == null ? new Dimension(200, 200) : new Dimension(bg.getWidth(), bg.getHeight()); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); paintBackground(g2d); g2d.dispose(); } protected void paintBackground(Graphics2D g2d) { paintBackground(g2d, getImage()); } protected void paintBackground(Graphics2D g2d, Image bg) { if (bg != null) { int x = (getWidth() - bg.getWidth(this)) / 2; int y = (getHeight() - bg.getHeight(this)) / 2; g2d.drawImage(bg, x, y, this); } } } public class DynamicImagePane extends StaticImagePane { private Image scaled; public DynamicImagePane() { try { setImage(ImageIO.read(new File("path\to\a\image"))); } catch (IOException ex) { ex.printStackTrace(); } } @Override public void invalidate() { super.invalidate(); if (getImage() != null) { int width = getWidth(); int height = getHeight(); if (width > 0 && height > 0) { // Keep the aspect ratio if (width > height) { width = -1; } else if (height > width) { height = -1; } scaled = getImage().getScaledInstance(width, height, Image.SCALE_SMOOTH); } } } public Image getScaledImage() { return scaled; } @Override protected void paintBackground(Graphics2D g2d) { paintBackground(g2d, getScaledImage()); } } }
请注意，这仅仅是一个例子，还有很多工作需要完成。
有一个问题是缩放，请参阅Image.getScaledInstance（）的详细信息和图像质量调整后非常低 – Java的更好的方法…
为了使它工作，我改变了这样的事情：
//OLD: public void printComponent(Component comp) { //NEW: public void printComponent(JComponent comp, boolean fill) throws PrinterException { PrinterJob pj = PrinterJob.getPrinterJob(); pj.setJobName(" Print Component "); pj.setPrintable(new ComponentPrintable(comp)); if (!pj.printDialog()) { return; } try { pj.print(); } catch (PrinterException ex) { System.out.println(ex); } }
