我想您没有意识到GridBagLayout与GridNxM一起工作,这意味着同一列中的所有组件都具有相同宽度的单元格,而同一行中的所有元素都位于相同高度的单元格中。这只是一个网格。
问题很简单,您在列0中有一些组件:“输入日期:”标签、输入日期文本字段。。。因此,最宽的组件决定了该列的大小。现在,您需要放置一组文本字段、标签和按钮来表示[14:00向上/向下]。你现在做的方法是首先放置一个空标签,它实际上不做任何事情(除了使用它的单元格),然后将所述组件放在第2、3、4列。。。
然而,正如我所说的,列0非常宽,因此列1+从已经放置的所有内容的右侧开始,这就是为什么所有这些组件都显示在“右侧”,因为列0非常窄。
现在,要让他们处于正确的位置,有两种选择。要么使上面的所有组件都跨越多个列,这样您就可以使用这些列将您所需的所有内容放在这些组件下面,要么使用这些组件创建一个面板,然后将该面板放在“输入时间:”下的列0中
在我看来,第二种方法要好得多,所以我去定义了一个
timeInputPanel
用我们需要的组件填充它,然后将其放入
panel_4
。现在因为
时间输入面板
只有一个组件,即使它包含几个其他组件,它也可以在列0内无任何问题地驻留。
相关代码如下:
JPanel timeInputPanel = new JPanel(new FlowLayout(FlowLayout.LEADING));
timeInputPanel.add(text_33);
timeInputPanel.add(label_4);
timeInputPanel.add(text_4);
timeInputPanel.add(upDownPanel);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1.0;
c.weighty = 1.0;
c.gridx = 0;
c.gridy = 15;
c.insets = new Insets(0, 10, 0, 0);
panel_4.add(timeInputPanel, c);
当然,您可能希望根据自己的喜好更改GridBagConstraints,唯一重要的是
c.gridx = 0;
和一个合适的
gridy
.
它看起来像这样:
完整代码:
package cardlayoutalignment;
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.border.BevelBorder;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
public class gridbaglayoutdemo
{
JFrame Card = new JFrame();
FlowLayout flow = new FlowLayout(FlowLayout.RIGHT, 2, 2);
Border etch = BorderFactory.createEtchedBorder(Color.white, Color.gray);
Border margin = new EmptyBorder(10, 10, 10, 10);
public static GridBagLayout grid = new GridBagLayout();
GridBagConstraints c = new GridBagConstraints();
final static boolean shouldFill = true;
JPanel container = new JPanel();
JPanel divider = new JPanel();
JPanel bodypanel = new JPanel();
final JPanel buttonpanel = new JPanel();
JPanel panel_1 = new JPanel();
JPanel panel_4 = new JPanel();
CardLayout cl = new CardLayout();
public gridbaglayoutdemo()
{
Card.setVisible(true);
Card.setSize(605, 333);
Card.setTitle("Tank Delivery");
// Card.setResizable(false);
final Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
int x = (int) ((dimension.getWidth() - Card.getWidth()) / 2);
int y = (int) ((dimension.getHeight() - Card.getHeight()) / 2);
Card.setLocation(x, y);
Card.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
bodypanel.setLayout(new BorderLayout());
divider.setLayout(new BorderLayout());
container.setLayout(cl);
cl.show(container, "1");
// JOptionPane.showMessageDialog(null,
// "Memory is full. Finish 1 transaction in order to use Memory again");
panel_1.setLayout(grid);
JLabel label_1 = new JLabel("Enter Tank:");
label_1.setFont(new Font("Arial", Font.PLAIN, 18));
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 0;
c.insets = new Insets(10, 10, 0, 0);
panel_1.add(label_1, c);
JComboBox box_1 = new JComboBox();
box_1.setPreferredSize(new Dimension(200, 30));
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 20;
c.insets = new Insets(10, 10, 0, 0);
panel_1.add(box_1, c);
JLabel label = new JLabel("");
label.setFont(new Font("Arial", Font.PLAIN, 18));
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 0.5;
c.weighty = 1;
c.gridx = 0;
c.gridy = 30;
c.insets = new Insets(10, 0, 0, 0);
panel_1.add(label, c);
panel_4.setLayout(grid);
JLabel label_2 = new JLabel("Enter Date:");
label_2.setFont(new Font("Arial", Font.PLAIN, 18));
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 0;
c.insets = new Insets(10, 10, 0, 0);
panel_4.add(label_2, c);
DateFormat df = new SimpleDateFormat("MM/dd/yyyy");
df.setLenient(false);
JFormattedTextField text_2 = new JFormattedTextField(df);
text_2.setValue(new Date());
text_2.setPreferredSize(new Dimension(200, 30));
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 5;
c.insets = new Insets(10, 10, 0, 0);
panel_4.add(text_2, c);
JLabel label_3 = new JLabel("Enter Time:");
label_3.setFont(new Font("Arial", Font.PLAIN, 18));
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 10;
c.insets = new Insets(10, 10, 0, 10);
panel_4.add(label_3, c);
String time3 = new java.text.SimpleDateFormat("HH").format(new java.util.Date());
JFormattedTextField text_33 = new JFormattedTextField();
text_33.setValue(time3);
JLabel label_4 = new JLabel(":");
label_4.setFont(new Font("Arial", Font.PLAIN, 18));
String time2 = new java.text.SimpleDateFormat("mm").format(new java.util.Date());
JFormattedTextField text_4 = new JFormattedTextField();
text_4.setValue(time2);
JButton btnup = new JButton("UP");
btnup.setFont(new Font("Arial", Font.PLAIN, 18));
JButton btndown = new JButton("DOWN");
btndown.setFont(new Font("Arial", Font.PLAIN, 18));
JPanel upDownPanel = new JPanel(new BorderLayout());
upDownPanel.add(btnup, BorderLayout.PAGE_START);
upDownPanel.add(btndown, BorderLayout.PAGE_END);
JPanel timeInputPanel = new JPanel(new FlowLayout(FlowLayout.LEADING));
timeInputPanel.add(text_33);
timeInputPanel.add(label_4);
timeInputPanel.add(text_4);
timeInputPanel.add(upDownPanel);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1.0;
c.weighty = 1.0;
c.gridx = 0;
c.gridy = 15;
c.insets = new Insets(0, 10, 0, 0);
panel_4.add(timeInputPanel, c);
JLabel label14 = new JLabel("");
label14.setFont(new Font("Arial", Font.PLAIN, 18));
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 0;
c.weighty = 1;
c.gridx = 0;
c.gridy = 30;
c.insets = new Insets(10, 0, 0, 0);
panel_4.add(label14, c);
buttonpanel.setLayout(new FlowLayout(SwingConstants.RIGHT));
buttonpanel.setBorder(new EmptyBorder(0, 10, 0, 0));
JButton btnBack = new JButton("< Back");
btnBack.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
cl.previous(container);
buttonpanel.repaint();
}
});
btnBack.setFont(new Font("Arial", Font.PLAIN, 20));
btnBack.setFocusable(false);
btnBack.setFocusTraversalKeysEnabled(false);
btnBack.setFocusPainted(false);
btnBack.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
btnBack.setPreferredSize(new Dimension(110, 40));
btnBack.setBackground(new Color(224, 223, 227));
buttonpanel.add(btnBack);
JButton btnNext = new JButton("Next >");
btnNext.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
cl.next(container);
buttonpanel.repaint();
}
});
btnNext.setFont(new Font("Arial", Font.PLAIN, 20));
btnNext.setFocusable(false);
btnNext.setFocusTraversalKeysEnabled(false);
btnNext.setFocusPainted(false);
btnNext.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
btnNext.setPreferredSize(new Dimension(110, 40));
btnNext.setBackground(new Color(224, 223, 227));
buttonpanel.add(btnNext);
JButton btnCancel = new JButton("Cancel");
btnCancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
btnCancel.setFont(new Font("Arial", Font.PLAIN, 20));
btnCancel.setFocusable(false);
btnCancel.setFocusTraversalKeysEnabled(false);
btnCancel.setFocusPainted(false);
btnCancel.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
btnCancel.setPreferredSize(new Dimension(110, 40));
btnCancel.setBackground(new Color(224, 223, 227));
buttonpanel.add(btnCancel);
divider.add(container, BorderLayout.NORTH);
container.add(panel_1, "1");
// container.add(p2.panel_2, "2");
// container.add(p3.panel_3, "3");
container.add(panel_4, "4");
divider.add(buttonpanel, BorderLayout.SOUTH);
JPanel numberpanel = new JPanel();
numberpanel.setPreferredSize(new Dimension(221, 0));
numberpanel.setBorder(new EmptyBorder(10, 0, 0, 10));
numberpanel.setBorder(BorderFactory.createEtchedBorder(Color.white, Color.gray));
numberpanel.setLayout(flow);
JButton button_7 = new JButton("7");
button_7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_7.setFont(new Font("Arial", Font.PLAIN, 30));
button_7.setFocusable(false);
button_7.setFocusTraversalKeysEnabled(false);
button_7.setFocusPainted(false);
button_7.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_7.setPreferredSize(new Dimension(70, 70));
button_7.setBackground(new Color(224, 223, 227));
numberpanel.add(button_7);
JButton button_8 = new JButton("8");
button_8.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_8.setFont(new Font("Arial", Font.PLAIN, 30));
button_8.setFocusable(false);
button_8.setFocusTraversalKeysEnabled(false);
button_8.setFocusPainted(false);
button_8.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_8.setPreferredSize(new Dimension(70, 70));
button_8.setBackground(new Color(224, 223, 227));
numberpanel.add(button_8);
JButton button_9 = new JButton("9");
button_9.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_9.setFont(new Font("Arial", Font.PLAIN, 30));
button_9.setFocusable(false);
button_9.setFocusTraversalKeysEnabled(false);
button_9.setFocusPainted(false);
button_9.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_9.setPreferredSize(new Dimension(70, 70));
button_9.setBackground(new Color(224, 223, 227));
numberpanel.add(button_9);
JButton button_4 = new JButton("4");
button_4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_4.setFont(new Font("Arial", Font.PLAIN, 30));
button_4.setFocusable(false);
button_4.setFocusTraversalKeysEnabled(false);
button_4.setFocusPainted(false);
button_4.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_4.setPreferredSize(new Dimension(70, 70));
button_4.setBackground(new Color(224, 223, 227));
numberpanel.add(button_4);
JButton button_5 = new JButton("5");
button_5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_5.setFont(new Font("Arial", Font.PLAIN, 30));
button_5.setFocusable(false);
button_5.setFocusTraversalKeysEnabled(false);
button_5.setFocusPainted(false);
button_5.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_5.setPreferredSize(new Dimension(70, 70));
button_5.setBackground(new Color(224, 223, 227));
numberpanel.add(button_5);
JButton button_6 = new JButton("6");
button_6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_6.setFont(new Font("Arial", Font.PLAIN, 30));
button_6.setFocusable(false);
button_6.setFocusTraversalKeysEnabled(false);
button_6.setFocusPainted(false);
button_6.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_6.setPreferredSize(new Dimension(70, 70));
button_6.setBackground(new Color(224, 223, 227));
numberpanel.add(button_6);
JButton button_1 = new JButton("1");
button_1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_1.setFont(new Font("Arial", Font.PLAIN, 30));
button_1.setFocusable(false);
button_1.setFocusTraversalKeysEnabled(false);
button_1.setFocusPainted(false);
button_1.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_1.setPreferredSize(new Dimension(70, 70));
button_1.setBackground(new Color(224, 223, 227));
numberpanel.add(button_1);
JButton button_2 = new JButton("2");
button_2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_2.setFont(new Font("Arial", Font.PLAIN, 30));
button_2.setFocusable(false);
button_2.setFocusTraversalKeysEnabled(false);
button_2.setFocusPainted(false);
button_2.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_2.setPreferredSize(new Dimension(70, 70));
button_2.setBackground(new Color(224, 223, 227));
numberpanel.add(button_2);
JButton button_3 = new JButton("3");
button_3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_3.setFont(new Font("Arial", Font.PLAIN, 30));
button_3.setFocusable(false);
button_3.setFocusTraversalKeysEnabled(false);
button_3.setFocusPainted(false);
button_3.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_3.setPreferredSize(new Dimension(70, 70));
button_3.setBackground(new Color(224, 223, 227));
numberpanel.add(button_3);
JButton button_0 = new JButton("0");
button_0.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_0.setFont(new Font("Arial", Font.PLAIN, 30));
button_0.setFocusable(false);
button_0.setFocusTraversalKeysEnabled(false);
button_0.setFocusPainted(false);
button_0.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_0.setPreferredSize(new Dimension(70, 70));
button_0.setBackground(new Color(224, 223, 227));
numberpanel.add(button_0);
JButton button_left = new JButton("");
button_left.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_left.setIcon(new ImageIcon("more_buttons\\left.png"));
button_left.setFont(new Font("Arial", Font.PLAIN, 30));
button_left.setFocusable(false);
button_left.setFocusTraversalKeysEnabled(false);
button_left.setFocusPainted(false);
button_left.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_left.setPreferredSize(new Dimension(70, 70));
button_left.setBackground(new Color(224, 223, 227));
numberpanel.add(button_left);
JButton button_right = new JButton("");
button_right.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
}
});
button_right.setIcon(new ImageIcon("more_buttons\\right.png"));
button_right.setFont(new Font("Arial", Font.PLAIN, 30));
button_right.setFocusable(false);
button_right.setFocusTraversalKeysEnabled(false);
button_right.setFocusPainted(false);
button_right.setBorder(new BevelBorder(BevelBorder.RAISED, Color.BLACK, null, null, null));
button_right.setPreferredSize(new Dimension(70, 70));
button_right.setBackground(new Color(224, 223, 227));
numberpanel.add(button_right);
Card.add(bodypanel);
bodypanel.add(divider, BorderLayout.WEST);
bodypanel.add(numberpanel, BorderLayout.EAST);
}
public static void main(String[] args)
{
// Use the event dispatch thread for Swing components
EventQueue.invokeLater(new Runnable() {
@Override
public void run()
{
new gridbaglayoutdemo();
}
});
}
}
