我目前正在使用Eclipse(Luna,Win 8.1)開發一個簡短的Java Swing項目。目的是顯示一個包含菜單的框架。該菜單具有不同的頁面(主菜單,選項等),通過JPanels實現按鈕,標籤等。這些JPanel由CardLayout組織,以這種方式調用CardLayout.show(..) - 方法在不同的菜單頁面。當我兩天前停止編程時,一切都很完美。但是,當我想要在昨天早上繼續時,我的代碼似乎完全忽略了CardLayout:將鼠標光標移動到其位置時,位於其他卡片中的按鈕將彈出第一張卡片的背景。我試圖解決(研究,使用備份等)連續17個小時。問題仍然存在,現在= /我非常絕望。以下SSCCE顯示相同的行爲(將鼠標移到左下角以查看「選項」卡的「返回」按鈕彈出)。Java Swing CardLayout:似乎同時顯示多張牌
package sscce;
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainFrame extends JFrame {
private CardLayout mainWindowLayout;
// mainPanel will be used as the MainFrame's main unit to manage Components
private JPanel mainPanel;
// Constructor
public MainFrame() {
setTitle("sscce");
setPreferredSize(new Dimension(800, 600));
setResizable(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getContentPane().setLayout(new BorderLayout());
mainPanel = new JPanel();
mainPanel.setPreferredSize(getSize());
mainWindowLayout = new CardLayout();
mainPanel.setLayout(mainWindowLayout);
buildMainMenu();
buildOptions();
getContentPane().add(mainPanel);
mainPanel.setVisible(true);
// starting application it will "show" (container,
// contentIdentifier(String))
mainWindowLayout.show(mainPanel, "2");
pack();
setVisible(true);
}// Constructor
private void buildMainMenu() {
JPanel panelMainMenu = new JPanel(new GridBagLayout());
panelMainMenu.setBackground(Color.orange);
// 1 Button (centered) to go to Options-Card
JButton bnOptions = new JButton("Options");
// Button Functionality
bnOptions.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
mainWindowLayout.show(mainPanel, "2");
}
});
panelMainMenu.add(bnOptions);
panelMainMenu.setOpaque(true);
// container content identifier(String)
mainPanel.add(panelMainMenu, "1");
panelMainMenu.setVisible(true);
}// buildMainMenu
private void buildOptions() {
JPanel panelOptions = new JPanel();
panelOptions.setLayout(new GridBagLayout());
// standardized margins for all Elements:
final Insets gbcInsets = new Insets(5, 5, 5, 5);
panelOptions.setBackground(Color.white);
JPanel fillerRight = new JPanel();
JPanel fillerTop = new JPanel();
JButton bnOptBack = new JButton("Back");
bnOptBack.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
mainWindowLayout.show(mainPanel, "1");
}
});
// add filler panels to keep button in position
fillerRight.setBackground(Color.red);
fillerRight.setOpaque(true);
panelOptions.add(fillerRight, new GridBagConstraints(1, 1, 1, 2, 1, 0,
GridBagConstraints.NORTH, GridBagConstraints.BOTH, gbcInsets,
0, 0));
fillerRight.setVisible(true);
fillerTop.setBackground(Color.pink);
fillerTop.setOpaque(true);
panelOptions.add(fillerTop, new GridBagConstraints(0, 0, 2, 1, 0, 1,
GridBagConstraints.NORTH, GridBagConstraints.BOTH, gbcInsets,
0, 0));
fillerTop.setVisible(true);
// 1 Button in lower left hand corner, sends you back to MainMenu-card
panelOptions.add(bnOptBack, new GridBagConstraints(0, 1, 1, 1, 0, 0,
GridBagConstraints.NORTH, GridBagConstraints.BOTH, gbcInsets,
0, 0));
bnOptBack.setVisible(true);
panelOptions.setOpaque(true);
// container content identifier(String)
mainPanel.add(panelOptions, "2");
panelOptions.setVisible(true);
}// buildOptions
public static void main(String[] args) {
MainFrame m = new MainFrame();
}// main
}// MainFrame
任何幫助,非常感謝。 在此先感謝:) 編輯:我想你不需要看看「buildMainMenu」和「buildOptions」方法太緊密,單個菜單頁面的設置似乎工作正常。
嗯..那我應該說的。工作正常,謝謝一堆:) – Almato 2015-02-11 18:12:04