如何制作像 JOptionPane 一样工作的 JPanel?
How to make a JPanel that work like JOptionPane?
我正在 NetBeans 上制作一个简单的 POS 系统,它会在单击产品照片时弹出 JPanel
(数量)询问数量。我正在使用卡片布局并将面板放在卡片布局内似乎不起作用,因为它的大小不同。它也很难定位,因为移动它会使更大的面板(购买)吸收它并成为面板的一部分,从而弄乱该面板的布局。我想让面板最初不可见,只用这段代码弹出:
public void mouseClicked(MouseEvent e) {
if (e.getSource() == bpie )
{
String name = "Banoffee Pie";
int price = 8;
quantity.setVisible(true);
}
}
我目前是初学者,很难自定义 JOptionPane
对话框,如果可能的话我更喜欢使用面板。该问题可以通过使用另一个 JFrame
来解决,但是,根据专家的说法,使用多个框架是不好的做法。
这是我希望选项窗格的外观:
I'm currently a beginner and have a hard time customizing JOptionPanes
JOptionPane
是为实用而不是定制而设计的。一旦您开始考虑 'How can I change a JOptionPane
to..?' 就放弃选项窗格,而是使用模态 JDialog
.
这里是一个使用对话框的例子。我沿着这些方向调整了布局:
- 标题栏下方居中的食物图标。
- 放弃了更简单的按钮名称,取而代之的是更具描述性的名称。
- 在同一行添加问题和答案,并使用旋转器选择数字。
当然,需要调整颜色以适应上面看到的样式,可能(可能不会 - 取决于进一步因素不是很明显)最好通过使用自定义可插拔外观来解决。
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.util.Random;
public class SweetShop {
private JComponent ui = null;
private static JFrame frame = new JFrame("Sweet Shop");
private final JDialog dialog = new JDialog(frame, "Choose Sweets", true);
Random random = new Random();
SpinnerNumberModel quantityModel = new SpinnerNumberModel(1, 1, 144, 1);
SweetShop() {
initUI();
}
public final void initUI() {
if (ui!=null) return;
ui = new JPanel(new GridBagLayout());
ui.setBorder(new EmptyBorder(40,100,40,100));
JButton button = new JButton("Buy Sweets");
ui.add(button);
ActionListener openChooserListener = (ActionEvent e) -> {
dialog.setLocationRelativeTo(button);
dialog.setVisible(true);
};
button.addActionListener(openChooserListener);
dialog.add(getSweetSelectionPanel());
dialog.pack();
}
private JPanel getSweetSelectionPanel() {
JPanel panel = new JPanel(new BorderLayout());
int pad = 10;
panel.setBorder(new EmptyBorder(pad, pad, pad, pad));
JPanel iconPanel = new JPanel();
for (int ii=0; ii<12; ii++) {
iconPanel.add(new JLabel(new ImageIcon(getSize16Image())));
}
panel.add(iconPanel, BorderLayout.PAGE_START);
JPanel buttonPanel = new JPanel();
JButton okButton = new JButton("Buy Delicious");
buttonPanel.add(okButton);
ActionListener okListener = (ActionEvent e) -> {
System.out.println("Yuuuummmmm.. x " +
quantityModel.getNumber().intValue());
dialog.setVisible(false);
};
okButton.addActionListener(okListener);
JButton cancelButton = new JButton("No Thanks");
buttonPanel.add(cancelButton);
ActionListener cancelListener = (ActionEvent e) -> {
System.out.println("I just like licking them.");
dialog.setVisible(false);
};
cancelButton.addActionListener(cancelListener);
panel.add(buttonPanel, BorderLayout.PAGE_END);
JPanel questionPanel = new JPanel();
questionPanel.setBorder(new EmptyBorder(20, 50, 20, 50));
panel.add(questionPanel); // automatically uses CENTER constraint
JLabel label = new JLabel("How many do you wish to buy?");
Font font = label.getFont();
label.setFont(font.deriveFont(Font.ITALIC));
label.setText("How many do you wish to buy?");
label.setBorder(new EmptyBorder(5, 5, 5, 5));
questionPanel.add(label);
JSpinner spinner = new JSpinner(quantityModel);
questionPanel.add(spinner);
return panel;
}
private Image getSize16Image() {
int w = 16;
int h = 16;
if (random.nextBoolean()) {
w = random.nextInt(12) + 4;
} else {
h = random.nextInt(12) + 4;
}
BufferedImage bi = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
return bi;
}
public JComponent getUI() {
return ui;
}
public static void main(String[] args) {
Runnable r = () -> {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
SweetShop o = new SweetShop();
frame = new JFrame(o.getClass().getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
frame.setContentPane(o.getUI());
frame.pack();
frame.setMinimumSize(frame.getSize());
frame.setVisible(true);
};
SwingUtilities.invokeLater(r);
}
}
我正在 NetBeans 上制作一个简单的 POS 系统,它会在单击产品照片时弹出 JPanel
(数量)询问数量。我正在使用卡片布局并将面板放在卡片布局内似乎不起作用,因为它的大小不同。它也很难定位,因为移动它会使更大的面板(购买)吸收它并成为面板的一部分,从而弄乱该面板的布局。我想让面板最初不可见,只用这段代码弹出:
public void mouseClicked(MouseEvent e) {
if (e.getSource() == bpie )
{
String name = "Banoffee Pie";
int price = 8;
quantity.setVisible(true);
}
}
我目前是初学者,很难自定义 JOptionPane
对话框,如果可能的话我更喜欢使用面板。该问题可以通过使用另一个 JFrame
来解决,但是,根据专家的说法,使用多个框架是不好的做法。
这是我希望选项窗格的外观:
I'm currently a beginner and have a hard time customizing JOptionPanes
JOptionPane
是为实用而不是定制而设计的。一旦您开始考虑 'How can I change a JOptionPane
to..?' 就放弃选项窗格,而是使用模态 JDialog
.
这里是一个使用对话框的例子。我沿着这些方向调整了布局:
- 标题栏下方居中的食物图标。
- 放弃了更简单的按钮名称,取而代之的是更具描述性的名称。
- 在同一行添加问题和答案,并使用旋转器选择数字。
当然,需要调整颜色以适应上面看到的样式,可能(可能不会 - 取决于进一步因素不是很明显)最好通过使用自定义可插拔外观来解决。
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.util.Random;
public class SweetShop {
private JComponent ui = null;
private static JFrame frame = new JFrame("Sweet Shop");
private final JDialog dialog = new JDialog(frame, "Choose Sweets", true);
Random random = new Random();
SpinnerNumberModel quantityModel = new SpinnerNumberModel(1, 1, 144, 1);
SweetShop() {
initUI();
}
public final void initUI() {
if (ui!=null) return;
ui = new JPanel(new GridBagLayout());
ui.setBorder(new EmptyBorder(40,100,40,100));
JButton button = new JButton("Buy Sweets");
ui.add(button);
ActionListener openChooserListener = (ActionEvent e) -> {
dialog.setLocationRelativeTo(button);
dialog.setVisible(true);
};
button.addActionListener(openChooserListener);
dialog.add(getSweetSelectionPanel());
dialog.pack();
}
private JPanel getSweetSelectionPanel() {
JPanel panel = new JPanel(new BorderLayout());
int pad = 10;
panel.setBorder(new EmptyBorder(pad, pad, pad, pad));
JPanel iconPanel = new JPanel();
for (int ii=0; ii<12; ii++) {
iconPanel.add(new JLabel(new ImageIcon(getSize16Image())));
}
panel.add(iconPanel, BorderLayout.PAGE_START);
JPanel buttonPanel = new JPanel();
JButton okButton = new JButton("Buy Delicious");
buttonPanel.add(okButton);
ActionListener okListener = (ActionEvent e) -> {
System.out.println("Yuuuummmmm.. x " +
quantityModel.getNumber().intValue());
dialog.setVisible(false);
};
okButton.addActionListener(okListener);
JButton cancelButton = new JButton("No Thanks");
buttonPanel.add(cancelButton);
ActionListener cancelListener = (ActionEvent e) -> {
System.out.println("I just like licking them.");
dialog.setVisible(false);
};
cancelButton.addActionListener(cancelListener);
panel.add(buttonPanel, BorderLayout.PAGE_END);
JPanel questionPanel = new JPanel();
questionPanel.setBorder(new EmptyBorder(20, 50, 20, 50));
panel.add(questionPanel); // automatically uses CENTER constraint
JLabel label = new JLabel("How many do you wish to buy?");
Font font = label.getFont();
label.setFont(font.deriveFont(Font.ITALIC));
label.setText("How many do you wish to buy?");
label.setBorder(new EmptyBorder(5, 5, 5, 5));
questionPanel.add(label);
JSpinner spinner = new JSpinner(quantityModel);
questionPanel.add(spinner);
return panel;
}
private Image getSize16Image() {
int w = 16;
int h = 16;
if (random.nextBoolean()) {
w = random.nextInt(12) + 4;
} else {
h = random.nextInt(12) + 4;
}
BufferedImage bi = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
return bi;
}
public JComponent getUI() {
return ui;
}
public static void main(String[] args) {
Runnable r = () -> {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
SweetShop o = new SweetShop();
frame = new JFrame(o.getClass().getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
frame.setContentPane(o.getUI());
frame.pack();
frame.setMinimumSize(frame.getSize());
frame.setVisible(true);
};
SwingUtilities.invokeLater(r);
}
}