我正在编写一个允许用户选择csv文件的程序，该文件具有不同数量的列和列标题，从csv文件中选择他们想要绘制的列，最后绘制图形。此界面是一个显示三个步骤的GUI，其代码如下所示。我的问题是“步骤2”的面板只能在用户选择文件后显示，因为csv文件中的列数可能不同，选择列标题的复选框也会相应变化。
我目前正在研究顺序显示面板的方法。理想情况下，我想保留目前看来的gui。我已经简要地阅读了有关使用组件侦听器的内容，但我不确定它们是否适合我需要的内容，这就是我所看到的示例：ComponentEventDemo
我见过的另一个建议是使用像Creating Wizard Dialogs with Java Swing这样的向导对话框，但是如果可能的话，我宁愿让前面的步骤可见。
任何有关解决此问题的合适方法的建议都会很棒。谢谢！
package dynamicgui;
import java.awt.event.*;
import static javax.swing.GroupLayout.Alignment.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.ArrayList;
import javax.swing.*;
public class Attempt2GUI extends JPanel {//{
// implements ItemListener{
public javax.swing.JFileChooser fc;
//public JFileChooser fc;// = new JFileChooser();
JFrame frame = new JFrame();
JPanel panel1 = new JPanel(); //setp 1 panel
JPanel panel2 = new JPanel(); //setp 2
JPanel panel3 = new JPanel(); //step 3
public String[] checkBoxNames = {"open", "close", "high", "low", "max",
"today", "yesterday", "tomorrow", "lowest", "min"};
public void setupGUI() {
GroupLayout p1layout = new GroupLayout(panel1);
panel1.setLayout(p1layout);
// panel1.addComponentListener(this);
p1layout.setAutoCreateGaps(true);
p1layout.setAutoCreateContainerGaps(true);
GroupLayout p2layout = new GroupLayout(panel2);
panel2.setLayout(p2layout);
// panel2.addComponentListener(this);
p2layout.setAutoCreateGaps(true);
p2layout.setAutoCreateContainerGaps(true);
GroupLayout p3layout = new GroupLayout(panel3);
panel3.setLayout(p3layout);
// panel3.addComponentListener(this);
p3layout.setAutoCreateGaps(true);
p3layout.setAutoCreateContainerGaps(true);
//CONTENTS OF TOP PANEL
JLabel step1 = new JLabel("Step 1:");
step1.setFont(new java.awt.Font("Tahoma", 1, 11));
step1.setHorizontalAlignment(javax.swing.SwingConstants.TRAILING);
JLabel inst1 = new JLabel("Select the file you use for this program.");
JButton fileChooseBtn = new JButton("Select File");
fileChooseBtn.addActionListener(new ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
fileChooseBtnActionPerformed(evt);
}
});
JButton toStep2Btn = new JButton("Next Step");
// toStep2Btn.addComponentListener(this);
toStep2Btn.setActionCommand("toStep2");
fc = new javax.swing.JFileChooser();
//note: 'fc' is the public file chooser
JSeparator p1lineBreak = new JSeparator();
//CONTENTS OF SECOND PANEL
JLabel step2 = new JLabel("Step 2:");
step2.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
step2.setHorizontalAlignment(javax.swing.SwingConstants.TRAILING);
JLabel inst2 = new JLabel("Select the title of the columns you wish to plot.");
System.out.println("checkBoxNames length = " + checkBoxNames.length);
System.out.println("length / 4 = " + checkBoxNames.length / 4);
System.out.println("length % 4 = " + checkBoxNames.length % 4);
JCheckBox[] checkBox;// = new JCheckBox[checkBoxNames.length];
checkBox = new JCheckBox[checkBoxNames.length];
JButton toStep3Btn = new JButton("Next Step");
JSeparator p2lineBreak = new JSeparator();
//CONTENTS OF THIRD PANEL
JLabel step3 = new JLabel("Step :3");
step3.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
step3.setHorizontalAlignment(javax.swing.SwingConstants.TRAILING);
JLabel inst3 = new JLabel("Plot the Graph.");
JButton plotBtn = new JButton("Plot Graph");
plotBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
graphBtnActionPerformed(evt);
}
});
//***************************************************************
//----------------LAYOUT PANELS-------------------------------
//***************************************************************
//TOP PANEL - panel to choose file to use
//horizonttal layout
GroupLayout.ParallelGroup p1withSeparator = p1layout.createParallelGroup(LEADING);
GroupLayout.SequentialGroup p1leftToRight = p1layout.createSequentialGroup();
p1leftToRight.addComponent(step1);
GroupLayout.ParallelGroup p1rightColumn = p1layout.createParallelGroup(LEADING);
p1rightColumn.addComponent(inst1);
p1rightColumn.addComponent(fileChooseBtn);
p1rightColumn.addComponent(toStep2Btn);
p1leftToRight.addGroup(p1rightColumn);
p1withSeparator.addGroup(p1leftToRight);
p1withSeparator.addGap(17, 17, 17);
p1withSeparator.addComponent(p1lineBreak);
p1layout.setHorizontalGroup(p1withSeparator);
//vertical layout
GroupLayout.SequentialGroup p1topToBottom = p1layout.createSequentialGroup();
GroupLayout.ParallelGroup p1topRow = p1layout.createParallelGroup(BASELINE);
p1topRow.addComponent(step1);
p1topRow.addComponent(inst1);
p1topToBottom.addGroup(p1topRow);
p1topToBottom.addComponent(fileChooseBtn);
p1topToBottom.addComponent(toStep2Btn);
p1topToBottom.addGap(20, 20, 20);
p1topToBottom.addComponent(p1lineBreak);
p1layout.setVerticalGroup(p1topToBottom);
// panel1.addComponentListener(this);
//***********************************************************************
//---------SECOND PANEL - checkboxes for column titles
//***********************************************************************
//horiszontal layout - before dynamic
GroupLayout.ParallelGroup p2withSeparatorH = p2layout.createParallelGroup(LEADING);
GroupLayout.SequentialGroup p2leftToRight = p2layout.createSequentialGroup();
p2leftToRight.addComponent(step2);
GroupLayout.ParallelGroup p2rightColumnH = p2layout.createParallelGroup(LEADING);
p2rightColumnH.addComponent(inst2);
//vertical group - before dynamic
GroupLayout.SequentialGroup p2withSeparatorV = p2layout.createSequentialGroup();
GroupLayout.ParallelGroup p2topToBottom = p2layout.createParallelGroup(BASELINE);
p2topToBottom.addComponent(step2);
GroupLayout.SequentialGroup p2rightColumnV = p2layout.createSequentialGroup();
p2rightColumnV.addComponent(inst2);
//add dynamic - both horizontal and vertical
if (checkBoxNames.length > 0) {
int rows = checkBoxNames.length / 4; //change '4' to alter num boxes from left to right
int remainder = checkBoxNames.length % 4;
if (rows > 0 || remainder > 0) {
GroupLayout.SequentialGroup boxesLeftToRightH = p2layout.createSequentialGroup();
GroupLayout.ParallelGroup boxesTopToBottomV = p2layout.createParallelGroup();
GroupLayout.ParallelGroup column1H = p2layout.createParallelGroup();
GroupLayout.ParallelGroup column2H = p2layout.createParallelGroup();
GroupLayout.ParallelGroup column3H = p2layout.createParallelGroup();
GroupLayout.ParallelGroup column4H = p2layout.createParallelGroup();
GroupLayout.SequentialGroup column1V = p2layout.createSequentialGroup();
GroupLayout.SequentialGroup column2V = p2layout.createSequentialGroup();
GroupLayout.SequentialGroup column3V = p2layout.createSequentialGroup();
GroupLayout.SequentialGroup column4V = p2layout.createSequentialGroup();
if ((rows > 1) || (rows == 1 && remainder > 0)) {
for (int c = 0; c < 4; c++) {
//cycle through each of the 4columns, change '4' to alter num boxes from left to right
for (int i = c; i < checkBoxNames.length - remainder; i = i + 4) {
//change '4' to alter num boxes from left to right
checkBox[i] = new JCheckBox(checkBoxNames[i]);
JCheckBox cb = new JCheckBox(checkBoxNames[i]);
cb.addItemListener(new MyCheckBoxListener());
// cb.setActionCommand(checkBoxNames[i]);
switch (c) {
case 0:
column1H.addComponent(cb);
column1V.addComponent(cb);
break;
case 1:
column2H.addComponent(cb);
column2V.addComponent(cb);
break;
case 2:
column3H.addComponent(cb);
column3V.addComponent(cb);
break;
case 3:
column4H.addComponent(cb);
column4V.addComponent(cb);
break;
}
}
if (remainder - c > 0) {
checkBox[checkBoxNames.length - (remainder - c)] = new JCheckBox(
checkBoxNames[checkBoxNames.length - (remainder - c)]);
JCheckBox cb = new JCheckBox(checkBoxNames[checkBoxNames.length - (remainder - c)]);
cb.addItemListener(new MyCheckBoxListener());
// cb.setActionCommand(checkBoxNames[c]);
switch (c) {
case 0:
column1H.addComponent(cb);
column1V.addComponent(cb);
break;
case 1:
column2H.addComponent(cb);
column2V.addComponent(cb);
break;
case 2:
column3H.addComponent(cb);
column3V.addComponent(cb);
break;
case 3:
column4H.addComponent(cb);
column4V.addComponent(cb);
break;
}
}
}
}
if (rows == 0 && remainder > 0) {
for (int i = 0; i < checkBoxNames.length; i++) {
//change '4' to alter num boxes from left to right
if (remainder - i > 0) {
checkBox[checkBoxNames.length - (remainder - i)] = new JCheckBox(
checkBoxNames[checkBoxNames.length - (remainder - i)]);
JCheckBox cb = new JCheckBox(checkBoxNames[checkBoxNames.length - (remainder - i)]);
cb.addItemListener(new MyCheckBoxListener());
// cb.setActionCommand(checkBoxNames[i]);
switch (i) {
case 0:
column1H.addComponent(cb);
column1V.addComponent(cb);
break;
case 1:
column2H.addComponent(cb);
column2V.addComponent(cb);
break;
case 2:
column3H.addComponent(cb);
column3V.addComponent(cb);
break;
case 3:
column4H.addComponent(cb);
column4V.addComponent(cb);
break;
}
}
}
}
boxesLeftToRightH.addGroup(column1H);
boxesLeftToRightH.addGroup(column2H);
boxesLeftToRightH.addGroup(column3H);
boxesLeftToRightH.addGroup(column4H);
boxesTopToBottomV.addGroup(column1V);
boxesTopToBottomV.addGroup(column2V);
boxesTopToBottomV.addGroup(column3V);
boxesTopToBottomV.addGroup(column4V);
p2rightColumnH.addGroup(boxesLeftToRightH);
p2rightColumnV.addGroup(boxesTopToBottomV);
}
}// end if length >0
//add horizonatal - after dygnamic
p2rightColumnH.addComponent(toStep3Btn);
p2leftToRight.addGroup(p2rightColumnH);
p2withSeparatorH.addGroup(p2leftToRight);
p2withSeparatorH.addGap(17, 17, 17);
p2withSeparatorH.addComponent(p2lineBreak);
p2layout.setHorizontalGroup(p2withSeparatorH);
//add vertical - after dynamic
p2rightColumnV.addComponent(toStep3Btn);
p2topToBottom.addGroup(p2rightColumnV);
p2withSeparatorV.addGroup(p2topToBottom);
p2withSeparatorV.addGap(20, 20, 20);
p2withSeparatorV.addComponent(p2lineBreak);
p2layout.setVerticalGroup(p2withSeparatorV);
// panel2.addComponentListener(this);
//***********************************************************************
//------------BOTTOM PANEL - panel that plots the graphs-----------------
//***********************************************************************
//horizontal layout
GroupLayout.SequentialGroup p3leftToRight = p3layout.createSequentialGroup();
p3leftToRight.addComponent(step3);
GroupLayout.ParallelGroup p3rightColumn = p3layout.createParallelGroup(LEADING);
p3rightColumn.addComponent(inst3);
p3rightColumn.addComponent(plotBtn);
p3leftToRight.addGroup(p3rightColumn);
p3layout.setHorizontalGroup(p3leftToRight);
//vertical layout
GroupLayout.SequentialGroup p3topToBottom = p3layout.createSequentialGroup();
GroupLayout.ParallelGroup p3topRow = p3layout.createParallelGroup(BASELINE);
p3topRow.addComponent(step3);
p3topRow.addComponent(inst3);
p3topToBottom.addGroup(p3topRow);
p3topToBottom.addComponent(plotBtn);
p3layout.setVerticalGroup(p3topToBottom);
//***************************************************************
//----------------ADD PANELS TO MAIN PANEL-------------------------------
//***************************************************************
/*
frame.getContentPane().setLayout(new GridLayout(3,0));
frame.getContentPane().add(panel1);
frame.getContentPane().add(panel2);
frame.getContentPane().add(panel3);
frame.pack();
frame.setVisible(true);
*
*/
}//end setupGUI
public void addToFrame() {
Attempt2GUI a2g = new Attempt2GUI();
// a2g.setupGUI();
frame.setTitle("Plot Graph");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new GridLayout(3, 0));
frame.getContentPane().add(panel1);
frame.getContentPane().add(panel2);
frame.getContentPane().add(panel3);
frame.pack();
frame.setVisible(true);
}
/*
* for the select file button to open file chooser window
*/
private static String selFilepath = "XXX";
private void fileChooseBtnActionPerformed(ActionEvent evt) {
System.out.println("the filepath before file selected is " + selFilepath);
// Show open dialog; this method does not return until the dialog is closed
fc.showOpenDialog(this);
File selFile = fc.getSelectedFile();
selFilepath = selFile.getAbsolutePath();
System.out.println("the file selected is " + selFile);
System.out.println("the file selected in string form is " + selFilepath);
}
/*
* the filepath will be passed to the reader class
*/
public String getFilepath() {
return selFilepath;
}
/*
* set the second panel visible
*
private void toStep2BtnActionPerformed(ActionEvent evt) {
if("toStep2".equals(evt.getActionCommand())){
panel2.setVisible(true);
//Need to revalidate and repaint, or else the panel
//will probably be drawn in the wrong place.
panel2.revalidate();
panel2.repaint();
}
}
/*
* set the third panel visible
*
private void toStep3BtnActionPerformed(ActionEvent evt) {
throw new UnsupportedOperationException("Not yet implemented");
}
/*
* call in the graph class
*/
private void graphBtnActionPerformed(ActionEvent evt) {
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MyGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MyGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MyGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MyGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
Attempt2GUI a2 = new Attempt2GUI();
a2.setupGUI();
a2.addToFrame();
System.out.println("filepath is " + a2.getFilepath());
a2.getFilepath();
// mmg.getSelectedBoxes();
}
/*
* keep running total of all checkboxes selected
*/
public static ArrayList<Integer> selected = new ArrayList<Integer>();
public int[] addSelectedBoxes(int index) {
selected.add(index);
for (int i = 0; i < selected.size(); i++) {
System.out.println("selected list in lineGUI is " + selected.get(i));
}
int[] selectedBoxes = {1, 2, 3};
return selectedBoxes;
}
}//end class lineGUI
/*
* handle the itemLIstener on the checkboxes
*/
class MyCheckBoxListener implements java.awt.event.ItemListener {
ComponentGUI lg = new ComponentGUI();
String[] boxes = lg.checkBoxNames;
ArrayList<Integer> selectedList = new ArrayList<Integer>();
/*
* tdentify the selected boxes and return an array of the indexes of these boxes
* to be used by the gui to plot each in the selected list series selected
*/
@Override
public void itemStateChanged(ItemEvent ie) {
for (int i = 0; i < boxes.length; i++) {
if (ie.getItem().toString().endsWith("text=" + boxes[i] + "]")) {
selectedList.add(i);
lg.addSelectedBoxes(i);
}
}
int[] selectedArray = new int[selectedList.size()];
for (int i = 0; i < selectedList.size(); i++) {
selectedArray[i] = selectedList.get(i);
}
for (int i = 0; i < selectedArray.length; i++) {
System.out.println("box selected = " + selectedArray[i]);
System.out.println("selectedList = " + selectedList.get(i));
}
}
public ArrayList<Integer> getNewBoxTick() {
return selectedList;
}
}
答案 0 :(得分：1)
您链接的向导文章提供了如何滚动自己的向导实现的基本描述，您应该能够轻松显示步骤列表并突出显示当前步骤。
我推出了自己的向导实现，并没有太复杂。以下是一些关于如何做到这一点的提示：
您可能希望为向导步骤创建基类，以提供常见数据，如 next 或 rollback 方法，步骤描述/名称，步骤控制面板等。
可能有其他解决方案可能会使用选项卡式窗格或CardLayout布局管理器。