我将会遇到一些我希望与其他一些jcombobox相结合的行为,因此我使用setModel()
将数组填充为值。在执行此操作并运行gui时,我注意到在选择了与第一个元素不同的元素后,其他元素未显示在组合框中。例如......
你可以看到它没有说charTwo
,即使这是我选择的。这是代码。
注意:第101行是setModel()
发生的地方......
import org.apache.commons.lang3.ArrayUtils;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TestGui extends JFrame {
private final String[] guiCharSelDefault = {"--- Select Character ---"};
private final String[] characters = {"charOne", "charTwo", "charThree", "charFour"};
private final String[] GuiCharSel = (String[]) ArrayUtils.addAll(guiCharSelDefault, characters);
private JComboBox charCombo = createStandardCombo(GuiCharSel);
private BackgroundPanel backgroundFrame = createBackgroundFrame("../images/Background.png");
private JPanel topFrame = createTopFrame();
private JScrollPane topFrameScroll = createTopScrollPane();
private JPanel centerFrame = createCenterFrame();
//**************************************************************************************
// Constructor
TestGui(){
setContentPane(backgroundFrame);
add(topFrameScroll, BorderLayout.NORTH);
add(centerFrame, BorderLayout.CENTER);
setSize(800,600);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
//**************************************************************************************
// Support Methods
private static GridBagConstraints setGbc(int gridx, int gridy, int gridWidth, int gridHeight, int ipadx, int ipady, String anchorLocation, double weightx, double weighty, Insets insets){
GridBagConstraints gbc = new GridBagConstraints();
if (anchorLocation.toUpperCase().equals("NORTHWEST")){
gbc.anchor = GridBagConstraints.NORTHWEST;
} else if (anchorLocation.toUpperCase().equals("NORTH")){
gbc.anchor = GridBagConstraints.NORTH;
} else if (anchorLocation.toUpperCase().equals("NORTHEAST")){
gbc.anchor = GridBagConstraints.NORTHEAST;
} else if (anchorLocation.toUpperCase().equals("WEST")){
gbc.anchor = GridBagConstraints.WEST;
} else if (anchorLocation.toUpperCase().equals("EAST")){
gbc.anchor = GridBagConstraints.EAST;
} else if (anchorLocation.toUpperCase().equals("SOUTHWEST")){
gbc.anchor = GridBagConstraints.SOUTHWEST;
} else if (anchorLocation.toUpperCase().equals("SOUTH")){
gbc.anchor = GridBagConstraints.SOUTH;
} else if (anchorLocation.toUpperCase().equals("SOUTHEAST")){
gbc.anchor = GridBagConstraints.SOUTHEAST;
} else {
gbc.anchor = GridBagConstraints.CENTER;
}
gbc.gridx = gridx; // column
gbc.gridy = gridy; // row
gbc.gridwidth = gridWidth; // number of columns
gbc.gridheight = gridHeight; // number of rows
gbc.ipadx = ipadx; // width of object
gbc.ipady = ipady; // height of object
gbc.weightx = weightx; // shifts rows to side of set anchor
gbc.weighty = weighty; // shifts columns to side of set anchor
gbc.insets = insets; // placement inside cell
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.fill = GridBagConstraints.VERTICAL;
return gbc;
}
private Insets setInsets(int top, int left, int bottom, int right){
Insets insets = new Insets(top,left,bottom,right);
return insets;
}
//**************************************************************************************
// Interactive Object Methods
private JComboBox createStandardCombo(String[] defaultValues){
JComboBox comboBox = new JComboBox(defaultValues);
DefaultListCellRenderer dlcr = new DefaultListCellRenderer();
dlcr.setHorizontalAlignment(DefaultListCellRenderer.CENTER);
comboBox.setRenderer(dlcr);
comboBox.setPrototypeDisplayValue("X" + guiCharSelDefault + "X");
return comboBox;
}
//**************************************************************************************
// Object Action Methods
private void setCharComboAction(){
charCombo.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
String charName = ((JComboBox)(e.getSource())).getSelectedItem().toString();
if (!(charName.equals(guiCharSelDefault[0]))){
charCombo.setModel(new DefaultComboBoxModel(characters));
}
}
}
);
}
//**************************************************************************************
// Panel Methods
private BackgroundPanel createBackgroundFrame(String imgLocName){
Image backgroundImg = null;
try {
backgroundImg = ImageIO.read(getClass().getResource(imgLocName));
System.out.println("File: " + imgLocName.toString());
} catch (Exception e) {
System.out.println("Cannot read file: " + e);
}
BackgroundPanel bgPanel = new BackgroundPanel(backgroundImg, BackgroundPanel.SCALED, 0.0f, 0.0f);
return bgPanel;
}
private JPanel createTopFrame(){
JPanel pnl = new JPanel();
pnl.setLayout(new GridBagLayout());
setCharComboAction();
pnl.add(charCombo, setGbc(0,0, 1,1, 0,0, "WEST", 0, 0, setInsets(0, 10, 0, 0)));
pnl.setOpaque(false);
return pnl;
}
private JScrollPane createTopScrollPane(){
JScrollPane scrollPane = new JScrollPane(backgroundFrame);
Border raisedBevel = BorderFactory.createRaisedBevelBorder();
Border lineBorder = BorderFactory.createMatteBorder(2, 2, 2, 2, new Color(224,224,224));
Border loweredBevel = BorderFactory.createLoweredBevelBorder();
Border compoundSetup = BorderFactory.createCompoundBorder(raisedBevel, lineBorder);
Border compoundFinal = BorderFactory.createCompoundBorder(compoundSetup, loweredBevel);
scrollPane.setBorder(compoundFinal);
scrollPane.setOpaque(false);
scrollPane.getViewport().setOpaque(false);
scrollPane.getViewport().setView(topFrame);
return scrollPane;
}
private JPanel createCenterFrame() {
JPanel pnl = new JPanel();
Border raisedBevel = BorderFactory.createRaisedBevelBorder();
Color lineColor = new Color(224, 224, 224);
Border lineBorder = BorderFactory.createMatteBorder(5, 5, 5, 5, lineColor);
Border loweredBevel = BorderFactory.createLoweredBevelBorder();
Border compoundSetup = BorderFactory.createCompoundBorder(raisedBevel, lineBorder);
Border compoundFinal = BorderFactory.createCompoundBorder(compoundSetup, loweredBevel);
TitledBorder topFrameTitle = BorderFactory.createTitledBorder(compoundFinal, "Stuff");
topFrameTitle.setTitleJustification(TitledBorder.CENTER);
pnl.setBorder(topFrameTitle);
pnl.setLayout(new GridBagLayout());
pnl.setOpaque(false);
return pnl;
}
//**************************************************************************************
public static void main(String[] args) {
new TestGui();
}
}
有没有办法让它在选择后保留所选项目?
答案 0 :(得分:1)
为什么你没有恢复选择???
private void setCharComboAction(){
charCombo.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
String charName = ((JComboBox)(e.getSource())).getSelectedItem().toString();
if (!(charName.equals(guiCharSelDefault[0]))){
DefaultComboBoxModel model = new DefaultComboBoxModel(characters);
model.setSelectedItem(charName);
charCombo.setModel(model);
}
}
}
);
}