[英]GridBagLayout not coming out as expected
我正在創建一個GUI,該GUI的頂部應該有一個按鈕,中間是一個視圖屏幕,底部是一個帶有標簽和文本輸入字段的區域,該區域根據按下的按鈕而變化。 放置所有內容的主面板是GridBagLayout。 包含文本輸入字段的面板是CardLayout。 我覺得好像已經設置了GridBagConstraints以及其他所有應有的設置,但是卻沒有得到預期的效果。 我想我在設置GridBagConstraints時有問題,或者在大小調整方面可能有問題,但是我不確定。 我將附上一張我運行它會得到什么以及我試圖獲得什么的圖片。
編碼:
import java.awt.CardLayout;
import java.awt.Component;
import java.awt.Container;
import javax.swing.JComponent;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.text.JTextComponent;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import java.awt.GridBagLayout;
import java.util.concurrent.Executors;
import java.awt.CardLayout;
import java.awt.GridBagConstraints;
import javax.swing.JLabel;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Dimension;
import java.awt.Insets;
public class Window extends JFrame {
public Window() {
Container panel = this.getContentPane();
panel.setLayout(new GridBagLayout());
panel.setSize(1000,1000);
GridBagConstraints gbc = new GridBagConstraints();
JButton ordersButton = new JButton("Orders");
gbc.gridx = 0;
gbc.gridy = 0;
panel.add(ordersButton, gbc);
JButton dishesButton = new JButton("Dishes");
gbc.gridx = 1;
gbc.gridy = 0;
panel.add(dishesButton, gbc);
JButton ingredientsButton = new JButton("Ingredients");
gbc.gridx = 2;
gbc.gridy = 0;
panel.add(ingredientsButton, gbc);
JButton suppliersButton = new JButton("Suppliers");
gbc.gridx = 3;
gbc.gridy = 0;
panel.add(suppliersButton, gbc);
JButton staffButton = new JButton("Staff");
gbc.gridx = 4;
gbc.gridy = 0;
panel.add(staffButton, gbc);
JButton dronesButton = new JButton("Drones");
gbc.gridx = 5;
gbc.gridy = 0;
panel.add(dronesButton, gbc);
JButton usersButton = new JButton("Users");
gbc.gridx = 6;
gbc.gridy = 0;
panel.add(usersButton, gbc);
JButton postcodesButton = new JButton("Postcodes");
gbc.gridx = 7;
gbc.gridy = 0;
panel.add(postcodesButton, gbc);
JButton configurationButton = new JButton("Configuration");
gbc.gridx = 8;
gbc.gridy = 0;
panel.add(configurationButton, gbc);
JTextField viewScreen = new JTextField();
gbc.gridy = GridBagConstraints.RELATIVE;
gbc.gridwidth = 9;
gbc.gridheight = 2;
viewScreen.setPreferredSize(new Dimension(650, 200));
panel.add(viewScreen, gbc);
JPanel ordersPanel = new JPanel();
JPanel dishesPanel = new JPanel();
ordersPanel.setLayout(new GridBagLayout());
dishesPanel.setLayout(new GridBagLayout());
ordersPanel.setSize(new Dimension(900, 500));
dishesPanel.setSize(new Dimension(900, 500));
JLabel orders1Label = new JLabel("order 1");
gbc.gridx = 0;
gbc.gridy = 0;
ordersPanel.add(orders1Label, gbc);
JLabel orders2Label = new JLabel("order 2");
gbc.gridx = 0;
gbc.gridy = 1;
ordersPanel.add(orders2Label, gbc);
JLabel dishes1Label = new JLabel("dish 1");
gbc.gridx = 0;
gbc.gridy = 0;
dishesPanel.add(dishes1Label, gbc);
JLabel dishes2Label = new JLabel("dish 2");
gbc.gridx = 0;
gbc.gridy = 1;
dishesPanel.add(dishes2Label, gbc);
JTextField orders1TextField = new JTextField();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 1;
gbc.gridwidth = 4;
ordersPanel.add(orders1TextField, gbc);
JTextField orders2TextField = new JTextField();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 1;
gbc.weighty = 1;
gbc.gridwidth = 4;
ordersPanel.add(orders2TextField, gbc);
JTextField dishes1TextField = new JTextField();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 1;
gbc.gridwidth = 4;
dishesPanel.add(dishes1TextField, gbc);
JTextField dishes2TextField = new JTextField();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 1;
gbc.weighty = 1;
gbc.gridwidth = 4;
dishesPanel.add(dishes2TextField, gbc);
orders1TextField.setPreferredSize(new Dimension(400, 20));
orders2TextField.setPreferredSize(new Dimension(400, 20));
dishes1TextField.setPreferredSize(new Dimension(400, 20));
dishes2TextField.setPreferredSize(new Dimension(400, 20));
JPanel entryFields = new JPanel();
CardLayout c1 = new CardLayout();
entryFields.setLayout(c1);
entryFields.setSize(new Dimension(900, 600));
gbc.gridheight = 7;
gbc.gridwidth = 9;
gbc.weighty = 1;
gbc.gridy = GridBagConstraints.RELATIVE;
entryFields.add("ordersPanel",ordersPanel);
entryFields.add("dishesPanel", dishesPanel);
c1.show(entryFields, "ordersPanel");
panel.add(entryFields, gbc);
ordersButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent arg0) {
c1.show(entryFields, "ordersPanel");
}
});
dishesButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent arg0) {
c1.show(entryFields, "dishesPanel");
}
});
//Display window
setSize(800,600);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
Window win = new Window();
}
}
出現什么:
我想要的是:
我應該補充一點,以下圖片是在將窗口調整為計算機屏幕大小之前得到的。 您可以在此處看到標簽,盡管您不能使用完整尺寸的標簽,而且它們會聚在一起,所以可能是我設置權重方式的問題,我這樣做了,因此至少每一行和每一列都有至少一個權重為1。
首先讓我們說,您對GridBagConstraints
實例所做的任何修改都將GridBagConstraints
到該實例的以下任何用法中。
因此,如果執行此操作gbc.gridwidth = 9
確保將其重置為gbc.gridwidth = 1
,否則每個添加的元素都將應用9的gridwidth。 無需每次在同一行上添加按鈕時gridy = 0
設置gridy = 0
,這只會添加不必要的代碼行。
現在,我剛剛清理了您的Window()
代碼,以向您顯示GridBagConstraints
的正確用法,並刪除了重復的分配。 您將不得不再次添加您的ActionListeners
public Window() {
Container panel = this.getContentPane();
panel.setLayout(new GridBagLayout());
panel.setSize(1000,1000);
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 1;
gbc.weighty = 1;
gbc.gridy = 0; // First row
JButton ordersButton = new JButton("Orders");
gbc.gridx = 0;
panel.add(ordersButton, gbc);
JButton dishesButton = new JButton("Dishes");
gbc.gridx = 1;
panel.add(dishesButton, gbc);
JButton ingredientsButton = new JButton("Ingredients");
gbc.gridx = 2;
panel.add(ingredientsButton, gbc);
JButton suppliersButton = new JButton("Suppliers");
gbc.gridx = 3;
panel.add(suppliersButton, gbc);
JButton staffButton = new JButton("Staff");
gbc.gridx = 4;
panel.add(staffButton, gbc);
JButton dronesButton = new JButton("Drones");
gbc.gridx = 5;
panel.add(dronesButton, gbc);
JButton usersButton = new JButton("Users");
gbc.gridx = 6;
panel.add(usersButton, gbc);
JButton postcodesButton = new JButton("Postcodes");
gbc.gridx = 7;
panel.add(postcodesButton, gbc);
JButton configurationButton = new JButton("Configuration");
gbc.gridx = 8;
panel.add(configurationButton, gbc);
JTextField viewScreen = new JTextField();
gbc.gridx = 0;
gbc.gridy = 1;
gbc.gridwidth = 9;
viewScreen.setPreferredSize(new Dimension(650, 200));
viewScreen.setMinimumSize(new Dimension(650, 200));
panel.add(viewScreen, gbc);
gbc.gridwidth = 1; // Reset the gridwidth
// Third row
JLabel orders1Label = new JLabel("order 1");
gbc.gridx = 1;
gbc.gridy = 2;
panel.add(orders1Label, gbc);
JLabel orders2Label = new JLabel("order 2");
gbc.gridx = 1;
gbc.gridy = 3;
panel.add(orders2Label, gbc);
JLabel dishes1Label = new JLabel("dish 1");
gbc.gridx = 1;
gbc.gridy = 4;
panel.add(dishes1Label, gbc);
JLabel dishes2Label = new JLabel("dish 2");
gbc.gridx = 1;
gbc.gridy = 5;
panel.add(dishes2Label, gbc);
gbc.gridwidth = 4; // Textfield width
JTextField orders1TextField = new JTextField();
gbc.gridx = 2;
gbc.gridy = 2;
panel.add(orders1TextField, gbc);
JTextField orders2TextField = new JTextField();
gbc.gridx = 2;
gbc.gridy = 3;
panel.add(orders2TextField, gbc);
JTextField dishes1TextField = new JTextField();
gbc.gridx = 2;
gbc.gridy = 4;
panel.add(dishes1TextField, gbc);
JTextField dishes2TextField = new JTextField();
gbc.gridx = 2;
gbc.gridy = 5;
panel.add(dishes2TextField, gbc);
orders1TextField.setPreferredSize(new Dimension(400, 20));
orders2TextField.setPreferredSize(new Dimension(400, 20));
dishes1TextField.setPreferredSize(new Dimension(400, 20));
dishes2TextField.setPreferredSize(new Dimension(400, 20));
//Display window
setSize(800,600);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
我得到了這個布局
布局可能不完全是您想要的布局,但是我希望您可以繼續使用此示例。 ;)
考慮將設計分解為更小,更易於布局的容器。
它使代碼清晰明了,並具有很高的靈活性:
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
public class Window extends JFrame {
public Window() {
Container panel = this.getContentPane(); //uses Borderlayout by default
JPanel buttonsPane = new JPanel(new GridLayout(1, 0));
JButton ordersButton = new JButton("Orders");
buttonsPane.add(ordersButton);
JButton dishesButton = new JButton("Dishes");
buttonsPane.add(dishesButton);
JButton ingredientsButton = new JButton("Ingredients");
buttonsPane.add(ingredientsButton);
JButton suppliersButton = new JButton("Suppliers");
buttonsPane.add(suppliersButton);
JButton staffButton = new JButton("Staff");
buttonsPane.add(staffButton);
JButton dronesButton = new JButton("Drones");
buttonsPane.add(dronesButton);
JButton usersButton = new JButton("Users");
buttonsPane.add(usersButton);
JButton postcodesButton = new JButton("Postcodes");
buttonsPane.add(postcodesButton);
JButton configurationButton = new JButton("Configuration");
buttonsPane.add(configurationButton);
panel.add(buttonsPane, BorderLayout.PAGE_START); //add to top
JTextField viewScreen = new JTextField();
viewScreen.setPreferredSize(new Dimension(650, 200));
panel.add(viewScreen, BorderLayout.CENTER); //add to center
JPanel ordersList = new JPanel();
ordersList.setLayout(new BoxLayout(ordersList, BoxLayout.Y_AXIS));
JPanel ordersPanel = new JPanel(); //uses FlowLayout by default
ordersList.add(ordersPanel);
JLabel orders1Label = new JLabel("order 1");
ordersPanel.add(orders1Label);
JTextField orders1TextField = new JTextField(50);
ordersPanel.add(orders1TextField);
JPanel ordersPanel1 = new JPanel();
ordersList.add(ordersPanel1);
JLabel orders2Label = new JLabel("order 2");
ordersPanel1.add(orders2Label);
JTextField orders2TextField = new JTextField(50);
ordersPanel1.add(orders2TextField);
JPanel dishesList = new JPanel();
dishesList.setLayout(new BoxLayout(dishesList, BoxLayout.Y_AXIS));
JPanel dishesPanel = new JPanel();
dishesList.add(dishesPanel);
JLabel dishes1Label = new JLabel("dish 1");
dishesPanel.add(dishes1Label);
JTextField dishes1TextField = new JTextField(50);
dishesPanel.add(dishes1TextField);
JPanel dishesPanel1 = new JPanel();
dishesList.add(dishesPanel1);
JLabel dishes2Label = new JLabel("dish 2");
dishesPanel1.add(dishes2Label);
JTextField dishes2TextField = new JTextField(50);
dishesPanel1.add(dishes2TextField);
JPanel entryFields = new JPanel();
CardLayout c1 = new CardLayout();
entryFields.setLayout(c1);
entryFields.add("ordersPanel",ordersList);
entryFields.add("dishesPanel", dishesList);
c1.show(entryFields, "ordersPanel");
panel.add(entryFields,BorderLayout.PAGE_END);
ordersButton.addActionListener(arg0 -> c1.show(entryFields, "ordersPanel"));
dishesButton.addActionListener(arg0 -> c1.show(entryFields, "dishesPanel"));
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(()->new Window());
}
}
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