设置jLabel的打印尺寸并在打印件上放置jRadiobutton [英] Setting print size of a jLabel and put a jRadiobutton on the print
本文介绍了设置jLabel的打印尺寸并在打印件上放置jRadiobutton的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个带有Icon的jLabel我应该打印。但是，我无法将jLabel的图标变为全尺寸。
以下是我认为影响打印尺寸的一些代码。
public static void printComponentToFile（Component comp，boolean fill）throws PrinterException {
Paper paper = new Paper（）;
paper.setSize（8.3 * 72,11.7 * 72）; //这里
paper.setImageableArea（18,18,100,300）; //这里
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（）;
}
尝试{
ImageIO.write（img，png，新文件（Page-+（填充？填充：）+。 PNG））;
} catch（IOException ex）{
ex.printStackTrace（）;
}
}
公共静态类ComponentPrinter实现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）抛出PrinterException {
if（page_index> 0） {
返回Printable.NO_SUCH_PAGE;
}
Graphics2D g2 =（Graphics2D）g;
g2.translate（format.getImageableX（），format.getImageableY（））;
double width =（int）Math.floor（format.getImageableWidth（））; //这里也是
double height =（int）Math.floor（format.getImageableHeight（））; //这里是
if（！fill）{
width = Math.min（width，comp.getPreferredSize（）。width）; //这里
height = Math.min（height，comp.getPreferredSize（）。height）; //这里
}
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（）;
}
返回Printable.PAGE_EXISTS;
}
}
那么我应该改变什么？ ？另外，如何在打印过程中放置一个radiobutton？这是因为我想用标签打印radiobutton。
这是我使用按钮打印标签的方式：
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？ ：
私人无效jButton1ActionPerformed（java.awt.event.ActionEvent中EVT）{
尝试{
printComponent （jLabel2，false）;
printComponent（jRadioBtn1，false）; //更改
} 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内容来打印另一个组件：
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（）;
}
请帮助。谢谢
解决方案
所以，基于我是能够拍摄7680x4800的图像并将其缩小以在842x598的区域内打印。
现在注意。 JLabel 不支持缩放。如果您的图像不适合可用空间，您将不得不自己进行缩放。以下解决方案对整个组件进行了扩展，尽管如此，通过一些巧妙的重新安排，可以使 TestPane 缩放它的图像并使用以上示例代替......
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（）{
尝试{
UIManager.setLookAndFeel（UIManager.getSystemLookAndFeelClassName（））;
}赶上（ClassNotFoundException的| InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException前）{
}
最终TestPane imagePane =新TestPane（）;
JButton的打印=的新的JButton（ 打印）;
print.addActionListener（新的ActionListener（）{
@覆盖
公共无效的actionPerformed（ActionEvent的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）;
}
}）;
}
公共类TestPane扩展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（）;
}
尝试{
ImageIO.write（img，png，新文件（Page-Scaled.png））;
} catch（IOException ex）{
ex.printStackTrace（）;
}
}
公共静态类ComponentPrintable实现Printable {
private Component comp;
private ComponentPrintable（Component comp）{
this.comp = comp;
}
@Override
public int print（Graphics g，PageFormat pf，int pageNumber）
throws PrinterException {
// TODO自动生成的方法stub
if（pageNumber> 0）{
返回Printable.NO_SUCH_PAGE;
}
//获取组件的首选大小...
Dimension compSize = comp.getPreferredSize（）;
//确保我们调整大小为首选大小
comp.setSize（compSize）;
//获取打印尺寸
尺寸printSize = new Dimension（）;
printSize.setSize（pf.getImageableWidth（），pf.getImageableHeight（））;
//计算比例因子
double scaleFactor = getScaleFactorToFit（compSize，printSize）;
//不想扩大规模，只想缩小
if（scaleFactor> 1d）{
scaleFactor = 1d;
}
//凯尔卡缩放尺寸...
double scaleWidth = compSize.width * scaleFactor;
double scaleHeight = compSize.height * scaleFactor;
//创建图形上下文的克隆。这允许我们操作
//图形上下文而不用担心一旦我们完成
它可能具有什么效果
Graphics2D g2 =（Graphics2D）g.create（）;
//计算组件的x / y位置，如果它可以
double x =（（pf.getImageableWidth（） - scaleWidth），这将在页面上居中
//结果/ 2d）+ pf.getImageableX（）;
double y =（（pf.getImageableHeight（） - scaleHeight）/ 2d）+ pf.getImageableY（）;
//在= new AffineTransform（）创建一个新的AffineTransformation
AffineTransform;
//将偏移量转换为页面
at.translate（x，y）的中心;
//设置缩放
at.scale（scaleFactor，scaleFactor）;
//应用转换
g2.transform（at）;
//打印组件
comp.printAll（g2）;
//处理图形上下文，释放内存并丢弃
//我们的更改
g2.dispose（）;
comp.revalidate（）;
返回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）;
}
返回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;
}
返回dScale;
}
}
I have a jLabel with an Icon that I should print. However, I can't get the jLabel's icon to full size.
Here's some of the code that I think that it is affecting the print size.
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;
}
}
So what should I change with those? Also, how can I put a radiobutton on the printing process? It's because I want to print the radiobutton altogether with the label.
This is how I print a label using a button:
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);
}
}
Can I make it like this?:
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);
}
}
UPDATE:
I think I have to add something here to print another component:
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();
}
Please help. Thanks
解决方案
So, based on the concept presented in Printing a JFrame and its components, I've been able to produce these two examples...
Which used the following JPanel as the base component...
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);
}
}
And based on the concept presented in Fit/Scale JComponent to page being printed I was able to take an image of 7680x4800 and scale it down to print within an area of 842x598.
Now note. JLabel DOES NOT support scaling. If your image does not fit within the available space, you are going to have to scale it yourself some how. The following solution scales the entire component, having said that, with a little bit of clever re-arranging, it would be possible to make the TestPane scale it's image instead and use the above example instead...
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;
}
}
这篇关于设置jLabel的打印尺寸并在打印件上放置jRadiobutton的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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