java - 如何防止 JPanel 调整大小以填充 JScrollPane-6ren

java - 如何防止 JPanel 调整大小以填充 JScrollPane

转载作者：行者123 更新时间：2023-12-01 13:26:41

使用 Java，我正在使用 GridBagLayout 创建一个表单。 GUI 位于 JPanel 内，JPanel 位于添加到 JFrame 的scrollPane 内。

我希望带有 GUI 的 JPanel 具有固定大小，以防止表单被拉伸(stretch)，但是，我希望 JScrollPanel 能够根据用户的偏好调整大小。 (类似于 MS Paint， Canvas 是我的 JPanel)。我想防止表单被拉伸(stretch)的原因是因为我希望它能够打印，从我现在的方式来看，打印的表单几乎按照我想要的方式打印，但如果框架在之前调整了大小，则会发生不利的改变打印。

也许我的问题最好通过打印的方式来解决，但问题是我以前从未处理过这种级别的打印，无法找到类似的问题/教程来帮助我解决问题。我的方向可能是“穷人的方式”，但它是目前唯一对我有意义的方式，我是一名相当新手的 Java 程序员。

FrontierMain.java

public class FrontierMain  {

public FrontierMain(){
    JFrame frame = new JFrame();
    frame.setTitle("Frontier Insulation Labor Record Tool");
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    LaborRecordPanel recordPanel = new LaborRecordPanel();
    frame.add(recordPanel.scrollPane);
    frame.pack();
    frame.setVisible(true);

}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable(){
        public void run(){
            FrontierMain fm = new FrontierMain();   
        }
    });

    System.out.println("Hello, World");
}
}

LaborRecordPanel.java

public class LaborRecordPanel implements
Printable, ActionListener {

    private Color shade = new Color(201,201,201); // color for shaded cells

    private JLabel dateSpace[] = new JLabel[7]; 
    private JLabel grandTotalSpace = new JLabel();
    private JLabel locAndDescSpace = new JLabel();
    private JLabel personnelSpace[] = new JLabel[10]; //  empty cells
    private JLabel calendarGridLines[] = new JLabel[300]; //empty labels for gridlines

    private ImageIcon logoIcon = new ImageIcon("Images/fici_logo1.jpg");
    private JLabel logoLabel = new JLabel(logoIcon);

    private JLabel authorizedBy = new JLabel("AUTHORIZED BY:");
    private JLabel toCertify = new JLabel("THIS IS TO CERTIFY THAT THE ABOVE LABOR HAS BEEN PERFORMED.");

    private JLabel laborRecordNO = new JLabel("NO.");
    private JLabel nameOfJob = new JLabel("NAME OF JOB:");
    private JLabel customerPO = new JLabel("CUSTOMER PO #:");
    private JLabel contractNO = new JLabel("CONTRACT NO.");
    private JLabel weekEnding = new JLabel("WEEK ENDING");

    private JLabel personnelList = new JLabel("<html>LIST SUPERVISION &<br> CRAFT LABOR BELOW:</html>");
    private JLabel locAndDescriptionLabel = new JLabel("LOCATION AND DESCRIPTION:");

    private JLabel personnelTitle = new JLabel("TITLE");
    private JLabel supt = new JLabel("SUPT.");
    private JLabel foreman = new JLabel("FOREMAN");
    private JLabel[] mechanic= new JLabel[8];

    private JLabel calendarTitle = new JLabel("NUMBER OF HOURS WORKED @ SITE");
    private JLabel dayHeading = new JLabel("DAY");
    private JLabel dateHeading = new JLabel("DATE");
    private JLabel[] ot2 = new JLabel[10];
    private JLabel[] ot1 = new JLabel[10];
    private JLabel[] st = new JLabel[10];

    private JLabel mon = new JLabel("MON");
    private JLabel tues = new JLabel("TUES");
    private JLabel wed = new JLabel("WED");
    private JLabel thur = new JLabel("THUR");
    private JLabel fri = new JLabel("FRI");
    private JLabel sat = new JLabel("SAT");
    private JLabel sun = new JLabel("SUN");

    private JLabel totalHours = new JLabel("<html>TOTAL<br> HOURS</html>");
    private JLabel ratePerHour = new JLabel("<html>RATE<br> PER<br> HOUR</html>");
    private JLabel totalAmount = new JLabel("<html>TOTAL<br> AMOUNT</html>");
    private JLabel grandTotal = new JLabel("TOTAL");

    JPanel rp = new JPanel();
    JScrollPane scrollPane = new JScrollPane(rp);

    LaborRecordPanel(){

        rp.setPreferredSize(new Dimension(1295,1830 ));
        rp.setMinimumSize(new Dimension(1295,1830 ));
        rp.setMaximumSize(new Dimension(1295,1830 ));
        scrollPane.setPreferredSize(new Dimension(900,700 ));

        scrollPane.getVerticalScrollBar().setUnitIncrement(16); //increase the scroll speed

        for (int i = 0; i <= 7; i++) mechanic[i] = new JLabel("MECHANIC"); // create mechanic labels

        for (int i = 0; i <= 9; i++) //create labels for work time
        {
            ot2[i] = new JLabel("OT-2");
            ot1[i] = new JLabel("OT-1");
            st[i] = new JLabel("S.T.");
        }
        //create empty labels for gridlines
        for (int i = 0; i <= 9; i++) personnelSpace[i] = new JLabel(); 
        for (int i = 0; i <= 6; i++) dateSpace[i] = new JLabel();
        for (int i = 0; i <= 299; i++) calendarGridLines[i] = new JLabel();

        GridBagLayout gridbag = new GridBagLayout();
        rp.setBackground(Color.WHITE);
        rp.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
        GridBagConstraints gbc = new GridBagConstraints();
        rp.setLayout(gridbag);
        //gbc.insets = new Insets(5, 5, 5, 5);

        //row 0////////////////////////////////////////////////////////////
        gbc.fill = GridBagConstraints.BOTH;
        gbc.gridx = 10;
        gbc.gridy = 0;
        gbc.weightx = 1;
        gbc.weighty = 1;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        laborRecordNO.setHorizontalAlignment(JLabel.CENTER);
        laborRecordNO.setFont(new Font("Dialog", Font.PLAIN, 18));
        gridbag.setConstraints(laborRecordNO, gbc);
        rp.add(laborRecordNO, gbc);

        //row 1////////////////////////////////////////////////////////////
        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.gridwidth = 13;
        gridbag.setConstraints(logoLabel, gbc);
        rp.add(logoLabel, gbc);

        //row 2////////////////////////////////////////////////////////////
        gbc.gridx = 0;
        gbc.gridy = 2;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        nameOfJob.setFont(nameOfJob.getFont().deriveFont(18.0f));
        gridbag.setConstraints(nameOfJob, gbc);
        rp.add(nameOfJob, gbc);

        gbc.gridx = 6;
        gbc.gridy = 2;
        gbc.gridheight = 1;
        gbc.gridwidth = 3;
        contractNO.setFont(contractNO.getFont().deriveFont(18.0f));
        gridbag.setConstraints(contractNO, gbc);
        rp.add(contractNO, gbc);

        //row 3////////////////////////////////////////////////////////////
        gbc.gridx = 0;
        gbc.gridy = 3;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        customerPO.setFont(customerPO.getFont().deriveFont(18.0f));
        gridbag.setConstraints(customerPO, gbc);
        rp.add(customerPO, gbc);

        gbc.gridx = 6;
        gbc.gridy = 3;
        gbc.gridheight = 1;
        gbc.gridwidth = 3;
        weekEnding.setFont(weekEnding.getFont().deriveFont(18.0f));
        gridbag.setConstraints(weekEnding, gbc);
        rp.add(weekEnding, gbc);

        //row 4////////////////////////////////////////////////////////////
        gbc.gridx = 0;
        gbc.gridy = 4;
        gbc.gridheight = 3;
        gbc.gridwidth = 1;
        personnelList.setHorizontalAlignment(JLabel.CENTER);
        personnelList.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
        personnelList.setFont(personnelList.getFont().deriveFont(18.0f));
        gridbag.setConstraints(personnelList, gbc);
        rp.add(personnelList, gbc);

        gbc.gridx = 1;
        gbc.gridy = 4;
        gbc.gridheight = 3;
        gbc.gridwidth = 1;
        personnelTitle.setHorizontalAlignment(JLabel.CENTER);
        personnelTitle.setBorder(BorderFactory.createMatteBorder(1, 0, 1, 0, Color.BLACK));
        personnelTitle.setFont(personnelTitle.getFont().deriveFont(18.0f));
        gridbag.setConstraints(personnelTitle, gbc);
        rp.add(personnelTitle, gbc);

        gbc.gridx = 2;
        gbc.gridy = 4;
        gbc.gridwidth = 8;
        gbc.gridheight = 1;
        calendarTitle.setHorizontalAlignment(JLabel.CENTER);
        calendarTitle.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 0, Color.BLACK));
        calendarTitle.setFont(calendarTitle.getFont().deriveFont(18.0f));
        gridbag.setConstraints(calendarTitle, gbc);
        rp.add(calendarTitle, gbc);

        gbc.gridx = 10;
        gbc.gridy = 4;
        gbc.gridheight = 3;
        gbc.gridwidth = 1;
        totalHours.setHorizontalAlignment(JLabel.CENTER);
        totalHours.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, Color.BLACK));
        totalHours.setFont(totalHours.getFont().deriveFont(18.0f));
        gridbag.setConstraints(totalHours, gbc);
        rp.add(totalHours, gbc);

        gbc.gridx = 11;
        gbc.gridy = 4;
        gbc.gridheight = 3;
        gbc.gridwidth = 1;
        ratePerHour.setHorizontalAlignment(JLabel.CENTER);
        ratePerHour.setBorder(BorderFactory.createMatteBorder(1, 0, 1, 0, Color.BLACK));
        ratePerHour.setFont(ratePerHour.getFont().deriveFont(18.0f));
        gridbag.setConstraints(ratePerHour, gbc);
        rp.add(ratePerHour, gbc);

        gbc.gridx = 12;
        gbc.gridy = 4;
        gbc.gridheight = 3;
        gbc.gridwidth = 1;
        totalAmount.setHorizontalAlignment(JLabel.CENTER);
        totalAmount.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, Color.BLACK));
        totalAmount.setFont(totalAmount.getFont().deriveFont(18.0f));
        gridbag.setConstraints(totalAmount, gbc);
        rp.add(totalAmount, gbc);

        //row 5//////////////////////////////////////////////////////////////////
        gbc.gridx = 2;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        dayHeading.setHorizontalAlignment(JLabel.CENTER);
        dayHeading.setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
        dayHeading.setFont(dayHeading.getFont().deriveFont(18.0f));
        gridbag.setConstraints(dayHeading, gbc);
        rp.add(dayHeading, gbc);

        gbc.gridx = 3;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        mon.setHorizontalAlignment(JLabel.CENTER);
        mon.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
        mon.setFont(mon.getFont().deriveFont(18.0f));
        gridbag.setConstraints(mon, gbc);
        rp.add(mon, gbc);

        gbc.gridx = 4;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        tues.setHorizontalAlignment(JLabel.CENTER);
        tues.setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
        tues.setFont(tues.getFont().deriveFont(18.0f));
        gridbag.setConstraints(tues, gbc);
        rp.add(tues, gbc);

        gbc.gridx = 5;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        wed.setHorizontalAlignment(JLabel.CENTER);
        wed.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
        wed.setFont(wed.getFont().deriveFont(18.0f));
        gridbag.setConstraints(wed, gbc);
        rp.add(wed, gbc);

        gbc.gridx = 6;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        thur.setHorizontalAlignment(JLabel.CENTER);
        thur.setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
        thur.setFont(thur.getFont().deriveFont(18.0f));
        gridbag.setConstraints(thur, gbc);
        rp.add(thur, gbc);

        gbc.gridx = 7;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        fri.setHorizontalAlignment(JLabel.CENTER);
        fri.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
        fri.setFont(fri.getFont().deriveFont(18.0f));
        gridbag.setConstraints(fri, gbc);
        rp.add(fri, gbc);

        gbc.gridx = 8;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        sat.setHorizontalAlignment(JLabel.CENTER);
        sat.setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
        sat.setFont(sat.getFont().deriveFont(18.0f));
        gridbag.setConstraints(sat, gbc);
        rp.add(sat, gbc);

        gbc.gridx = 9;
        gbc.gridy = 5;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        sun.setHorizontalAlignment(JLabel.CENTER);
        sun.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
        sun.setFont(sun.getFont().deriveFont(18.0f));
        gridbag.setConstraints(sun, gbc);
        rp.add(sun, gbc);

        //row 6//////////////////////////////////////////////////////////////
        gbc.gridx = 2;
        gbc.gridy = 6;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        dateHeading.setHorizontalAlignment(JLabel.CENTER);
        dateHeading.setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
        dateHeading.setFont(dateHeading.getFont().deriveFont(18.0f));
        gridbag.setConstraints(dateHeading, gbc);
        rp.add(dateHeading, gbc);   

        int dateSpaceIndex = 3;
        boolean flip = true;
        for (int k = 0; k <= 6; k++)//create gridlines for day area
        {
            gbc.gridx = dateSpaceIndex;
            gbc.gridy = 6;
            gbc.gridheight = 1;
            gbc.gridwidth = 1;
            if(flip) dateSpace[k].setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
            else dateSpace[k].setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
            gridbag.setConstraints(dateSpace[k], gbc);
            rp.add(dateSpace[k], gbc);
            dateSpaceIndex++;
            flip = !flip;
        }

        //row 7/////////////////////////////////////////////////////////////
        gbc.gridx = 1;
        gbc.gridy = 7;
        gbc.gridheight = 3;
        gbc.gridwidth = 1;
        supt.setHorizontalAlignment(JLabel.CENTER);
        supt.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
        supt.setFont(supt.getFont().deriveFont(18.0f));
        gridbag.setConstraints(supt, gbc);
        rp.add(supt, gbc);

        //row 10///////////////////////////////////////////////////////////
        gbc.gridx = 1;
        gbc.gridy = 10;
        gbc.gridheight = 3;
        gbc.gridwidth = 1;
        foreman.setHorizontalAlignment(JLabel.CENTER);
        foreman.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
        foreman.setFont(foreman.getFont().deriveFont(18.0f));
        gridbag.setConstraints(foreman, gbc);
        rp.add(foreman, gbc);

        //row 13-36 plus 7-12 time worked labels//////////////////////////
        for (int r = 0; r <= 7; r++)
        {
            gbc.gridx = 1;
            gbc.gridy = 13 + (3*r);
            gbc.gridheight = 3;
            gbc.gridwidth = 1;
            mechanic[r].setHorizontalAlignment(JLabel.CENTER);
            mechanic[r].setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
            mechanic[r].setFont(mechanic[r].getFont().deriveFont(18.0f));
            gridbag.setConstraints(mechanic[r], gbc);
            rp.add(mechanic[r], gbc);
        }

        for (int c = 0; c <= 9; c++){
            gbc.gridx = 2;
            gbc.gridy = 7 + (3*c);
            gbc.gridheight = 1;
            gbc.gridwidth = 1;
            ot2[c].setHorizontalAlignment(JLabel.CENTER);
            ot2[c].setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
            ot2[c].setFont(ot2[c].getFont().deriveFont(18.0f));
            gridbag.setConstraints(ot2[c], gbc);
            rp.add(ot2[c], gbc);

            gbc.gridx = 2;
            gbc.gridy = 8 + (3*c);
            gbc.gridheight = 1;
            gbc.gridwidth = 1;
            ot1[c].setHorizontalAlignment(JLabel.CENTER);
            ot1[c].setOpaque(true);
            ot1[c].setBackground(shade);
            ot1[c].setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
            ot1[c].setFont(ot1[c].getFont().deriveFont(18.0f));
            gridbag.setConstraints(ot1[c], gbc);
            rp.add(ot1[c], gbc);

            gbc.gridx = 2;
            gbc.gridy = 9 + (3*c);
            gbc.gridheight = 1;
            gbc.gridwidth = 1;
            st[c].setHorizontalAlignment(JLabel.CENTER);
            st[c].setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
            st[c].setFont(st[c].getFont().deriveFont(18.0f));
            gridbag.setConstraints(st[c], gbc);
            rp.add(st[c], gbc);
        }
        //row 37/////////////////////////////////////////////////////////////////
        gbc.gridx = 0;
        gbc.gridy = 37;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        locAndDescriptionLabel.setFont(locAndDescriptionLabel.getFont().deriveFont(18.0f));
        gridbag.setConstraints(locAndDescriptionLabel, gbc);
        rp.add(locAndDescriptionLabel);

        gbc.gridx = 11;
        gbc.gridy = 37;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        grandTotal.setHorizontalAlignment(JLabel.CENTER);
        grandTotal.setOpaque(true);
        grandTotal.setBackground(Color.BLACK);
        grandTotal.setForeground(Color.WHITE);
        grandTotal.setBorder(BorderFactory.createLineBorder(Color.BLACK,1));
        grandTotal.setFont(grandTotal.getFont().deriveFont(18.0f));
        gridbag.setConstraints(grandTotal, gbc);
        rp.add(grandTotal);

        gbc.gridx = 12;
        gbc.gridy = 37;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        grandTotalSpace.setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
        gridbag.setConstraints(grandTotalSpace, gbc);
        rp.add(grandTotalSpace);

        //row 38////////////////////////////////////////////////////////////////
        gbc.gridx = 0;
        gbc.gridy = 38;
        gbc.gridwidth = 10;
        gbc.gridheight = 1;
        gbc.ipady = 80;
        locAndDescSpace.setBorder(BorderFactory.createLineBorder(Color.BLACK,1));
        gridbag.setConstraints(locAndDescSpace, gbc);
        rp.add(locAndDescSpace);

        //row 39////////////////////////////////////////////////////////////////
        gbc.ipady = 0; //reset to default
        gbc.gridx = 0;
        gbc.gridy = 39;
        gbc.gridheight = 1;
        gbc.gridwidth = 2;
        toCertify.setFont(toCertify.getFont().deriveFont(18.0f));
        gridbag.setConstraints(toCertify, gbc);
        rp.add(toCertify);

        //row 40///////////////////////////////////////////////////////////////
        gbc.gridx = 0;
        gbc.gridy = 40;
        gbc.gridheight = 1;
        gbc.gridwidth = 3;
        authorizedBy.setFont(authorizedBy.getFont().deriveFont(18.0f));
        gridbag.setConstraints(authorizedBy, gbc);
        rp.add(authorizedBy);


        for (int r = 0; r <= 9; r++)//gridlines for personnel space
        {
            gbc.gridx = 0;
            gbc.gridy = 7 + (3*r);
            gbc.gridheight = 3;
            gbc.gridwidth = 1;
            personnelSpace[r].setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
            gridbag.setConstraints(personnelSpace[r], gbc);
            rp.add(personnelSpace[r]);
        }
        //create calendar grid lines
        int yPointer = 7;
        int xPointer = 3;
        int shadePtr = 8;
        for (int j = 0; j <= 299; j++)
        {
            gbc.gridx = xPointer;
            gbc.gridy = yPointer;
            gbc.gridheight = 1;
            gbc.gridwidth = 1;
            calendarGridLines[j].setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK));
            if (yPointer == shadePtr){ //if row number = shadePtr then color the cell
                calendarGridLines[j].setOpaque(true);
                calendarGridLines[j].setBackground(shade);
            }
            gridbag.setConstraints(calendarGridLines[j], gbc);
            rp.add(calendarGridLines[j]);
            xPointer++; //go to next cell in row
            j++; //use the next jlabel
            gbc.gridx = xPointer;
            gbc.gridy = yPointer;
            gbc.gridheight = 1;
            gbc.gridwidth = 1;
            calendarGridLines[j].setBorder(BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK));
            if (yPointer == shadePtr){ //if row number = shadePtr then color the cell
                calendarGridLines[j].setOpaque(true);
                calendarGridLines[j].setBackground(shade);
            }
            gridbag.setConstraints(calendarGridLines[j], gbc);
            rp.add(calendarGridLines[j]);

            xPointer++; //go to next cell in row

            if(xPointer == 13) //if end of column then go to next row and reset column pointer to 3 and increment shade pointer by 3
            {
                yPointer++; //go down a row
                xPointer = 3;
                if((j % 3) == 0) {
                    shadePtr = yPointer;
                }
            }
        }

        JButton printTest = new JButton("PrintTest");
        printTest.addActionListener(this);
        gbc.gridx = 0;
        gbc.gridy = 41;
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        gridbag.setConstraints(printTest, gbc);
        rp.add(printTest);

    }
    @Override
    public void actionPerformed(ActionEvent e) {
        PrinterJob printJob = PrinterJob.getPrinterJob();
        printJob.setPrintable(this);
        if (printJob.printDialog()){
            try{
                printJob.print();
            }
            catch(Exception ex){
                throw new RuntimeException(ex);
            }
        }

    }
    @Override
    public int print(Graphics g, PageFormat pf, int index)
            throws PrinterException {
        Graphics2D g2 = (Graphics2D)g;
        if (index >= 1){
            return Printable.NO_SUCH_PAGE;
        }
        else {
            AffineTransform originalTransform = g2.getTransform();

            double scaleX = pf.getImageableWidth() / rp.getWidth();
            double scaleY = pf.getImageableHeight() / rp.getHeight();
            // Maintain aspect ratio
            double scale = Math.min(scaleX, scaleY);
            g2.translate(pf.getImageableX(), pf.getImageableY());
            g2.scale(scale, scale);
            rp.printAll(g2);

            g2.setTransform(originalTransform);
            return Printable.PAGE_EXISTS;
        }
    }

}

最佳答案

我将主 GUI 面板放在另一个 JPanel 中，该 JPanel 位于 JScrollPane 中。这会阻止我的主 GUI 调整到框架大小；相反，“外部”JPanel 会调整大小。

关于java - 如何防止 JPanel 调整大小以填充 JScrollPane，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21784537/

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mysql - tinyint(大小)，varchar(大小): "size" explaination
我知道 tinyint(1) 和 tinyint(2) 具有相同的存储空间范围。唯一的区别是显示宽度不同。这是否意味着 tinyint(1) 将存储所有类型的整数但只正确显示 0 到 9 的范围？而
c++ - 大小 8 的无效读取，大小 8 的无效写入 (Valgrind)
今晚我已经研究了以下代码几个小时，但我只是摸不着头脑。当使用函数从标准输入填充数组时，我不断收到“大小 8 的无效写入”和“大小 8 的无效读取”。如有任何帮助，我们将不胜感激...我知道 Sta
c - 大小 8 的无效读取，大小 8 的无效写入，C
我有一个 valgrind 错误，我不知道如何摆脱它们: ==5685== Invalid read of size 8 ==5685== at 0x4008A1: main (in /home
Hadoop block 大小 vs 拆分 vs block 大小
我对 Hadoop 的概念有点困惑。 Hadoop block 大小、拆分大小和 block 大小之间有什么区别？提前致谢。最佳答案 block 大小和 block 大小相同。拆分大小可能与
javascript - 超过 localStorage 配额(localStorage 大小!= 文件下载大小)& 如何检查 localStorage 大小
我想不出一个好的标题，所以希望可以。我正在做的是创建一个离线 HTML5 webapp。 “出于某些原因”我不希望将某些文件放在缓存 list 中，而是希望将内容放在 localStorage 中。
xamarin - 减少 Xamarin.Forms 中的 APK 大小，APK 大小 80MB
无法将 xamarin apk 大小减少到 80 MB 以下，已执行以下操作: 启用混淆器配置:发布平台:事件(任何 CPU)。启用 Multi-Dex:true 启用开发人员检测(调试和分析)
python - 读取多个 csv 文件(大小 mxm)并加载为 n 维数组(大小 nxmxm)(不连接)
我正在开发一个程序，需要将大量 csv 文件(数千个)加载到数组中。 csv 文件的尺寸为 45x100，我想创建一个尺寸为 nx45x100 的 3-d 数组。目前，我使用 pd.read_csv(
react-native - Flutter apk/ipa 大小 vs React Native apk/ipa 大小
Hello World 示例的 React Native APK 大小约为 20M (in recent versions)，因为支持不同的硬件架构(ARMv7、ARMv8、X86 等)，而同一应用程
python - 将 n 个元素(大小 = 2 字节，十进制)的列表拆分为 2n 个元素(大小 = 1 字节，十六进制)
我有一个包含 n 个十进制元素的列表，其中每个元素都是两个字节长。可以说: x = [9000 , 5000 , 2000 , 400] 这个想法是将每个元素拆分为 MSB 和 LSB 并将其存储在
GtkTextView 大小
如何设置 GtKTextView 的大小？我想我不能使用 gtk_widget_set_usize。最佳答案您不能直接控制小部件的大小，而是由其容器完成。您可以使用 gtk_widget_set_
具有函数的结构的c++大小
这个问题在这里已经有了答案: c++ sizeof() of a class with functions (7 个答案) 关闭 5 年前。结果是 12。 foobar 函数存储在内存中的什么位置
image - 为什么图像序列比源视频大(大小)？
当我在 ffmpeg(或任何其他程序)中使用这样的命令时: ffmpeg -i input.mp4 image%d.jpg 所有图像的组合文件大小总是比视频本身大。我尝试减少每秒帧数、降低压缩设置、模
clojurescript 高级编译 - 大小
我是 clojurescript 的新手。高级编译后出现“77 KB”的javascript文件是否正常？我有一个 clojurescript 文件: 我正在使用 leinigen: lein c
Qt QPixmap 大小
我想要一个 QPixmap尺寸为 50 x 50。我试过 : QPixmap watermark(QSize(50,50)); watermark.load(":/icoMenu/preparati
卷积层的 tensorflow 大小
我正在尝试从一篇研究论文中重新创建一个 cnn，但我对深度学习还是个新手。我得到了一个大小为 32x32x7 的 3d 补丁。我首先想执行一个大小为 3x3 的卷积，具有 32 个特征和步幅为 2。
iPhone如何在旋转设备时正确调整 View 大小
我一直在尝试调整 View Controller 内的 View 大小，但到目前为止没有运气。基本上，我的 View 最底部有一个按钮，当方向从纵向更改为横向时，该按钮不再可见，因为它现在太靠下了。
javascript - 上传前检查图像尺寸/大小
如何使用此功能检查图像的尺寸？我只是想在上传之前检查一下... $("#LINK_UPLOAD_PHOTO").submit(function () { var form = $(this);
二叉搜索树上的 JavaScript 大小
我用 C++ 完成了这个，因为你可以通过引用传递参数。我无法弄清楚如何在 JavaScript 中执行此操作。我的代码需要更改什么？我的输出是1 this.sizeOfBst = function()

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java - 如何防止 JPanel 调整大小以填充 JScrollPane