我正在编写一个扩展JComboBox的自定义组件。我的问题是,如果我添加或删除项目,PopupMenu不会实现其大小。所以有例如列表中有2个项目,但是如果有4个项目之前我有2个"空白" PopupMenu中的项目。
我找到的唯一解决方法是(在JIntelligentComboBox.java第213行)
this.setPopupVisible(false);
this.setPopupVisible(true);
但结果将是一个闪烁的PopupMenu: - (
那么我还能做些什么来刷新/重绘PopupMenu而不会闪烁?
进行测试:the component和一点点test programm如果要产生我的问题,您可以例如:
提前致谢
编辑: 我的目标是一个ComboBox,其作用类似于Firefox或Chrome中的地址栏,我想显示包含类型字符的PopupMenu的所有项目。
cboxtester.java:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
public class cboxtester extends JFrame {
private DefaultComboBoxModel dcm = new DefaultComboBoxModel(new Object[][] {new Object[] {"Mittagessen", "", 0},
new Object[] {"Essen", "", 0},
new Object[] {"Frühstück", "", 0},
new Object[] {"Abendessen", "", 0}});
private JIntelligentComboBox icb = new JIntelligentComboBox(dcm);
private cboxtester(){
this.add(icb, BorderLayout.CENTER);
this.add(new JButton("bla"), BorderLayout.EAST);
this.pack();
this.setVisible(true);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
cboxtester cbt = new cboxtester();
}
}
JIntelligentComboBox.java:
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.Vector;
import javax.swing.ComboBoxEditor;
import javax.swing.ComboBoxModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.DefaultRowSorter;
import javax.swing.JComboBox;
import javax.swing.JList;
import javax.swing.JTextField;
import javax.swing.ListCellRenderer;
import javax.swing.MutableComboBoxModel;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import javax.swing.plaf.basic.BasicComboBoxEditor;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
import javax.swing.plaf.metal.MetalComboBoxEditor;
public class JIntelligentComboBox extends JComboBox {
private ArrayList<Object> itemBackup = new ArrayList<Object>();
/** Initisiert die JIntelligentComboBox */
private void init(){
class searchComboBoxEditor extends BasicComboBoxEditor {
public searchComboBoxEditor(){
super();
}
@Override
public void setItem(Object anObject){
if (anObject == null) {
super.setItem(anObject);
} else {
Object[] o = (Object[]) anObject;
super.setItem(o[0]);
}
}
@Override
public Object getItem(){
return new Object[]{super.getItem(), super.getItem(), 0};
}
}
this.setEditor(new searchComboBoxEditor());
this.setEditable(true);
class searchRenderer extends BasicComboBoxRenderer {
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus){
if (index == 0) {
setText("");
this.setPreferredSize(new Dimension(1, 1));
return this;
}
this.setPreferredSize(new Dimension(160, 17));
if (index == list.getModel().getSize() - 1) {
this.setBorder(new EmptyBorder(0, 3, 1, 3));
} else {
this.setBorder(new EmptyBorder(0, 3, 0, 3));
}
Object[] v = (Object[]) value;
//System.out.println(v[0]);
this.setFont(new Font("Arial", Font.PLAIN, 12));
this.setBackground(Color.white);
String s = (String) v[0];
String lowerS = s.toLowerCase();
String sf = (String) v[1];
String lowerSf = sf.toLowerCase();
ArrayList<String> notMatching = new ArrayList<String>();
if (!sf.equals("")){
int fs = -1;
int lastFs = 0;
while ((fs = lowerS.indexOf((String) lowerSf, (lastFs == 0) ? -1 : lastFs)) > -1) {
notMatching.add(s.substring(lastFs, fs));
lastFs = fs + sf.length();
//System.out.println(fs+sf.length());
}
notMatching.add(s.substring(lastFs));
//System.out.println(notMatching);
}
String html = "";
if (notMatching.size() > 1) {
html = notMatching.get(0);
int start = html.length();
int sfl = sf.length();
for (int i = 1; i < notMatching.size(); i++) {
String t = notMatching.get(i);
html += "<b style=\"color: black;\">" + s.substring(start, start + sfl) + "</b>" + t;
start += sfl + t.length();
}
}
System.out.println(index + html);
this.setText("<html><head></head><body style=\"color: gray;\">" + html + "</body></head>");
return this;
}
}
this.setRenderer(new searchRenderer());
// leeres Element oben einfügen
int size = this.getModel().getSize();
Object[] tmp = new Object[this.getModel().getSize()];
for (int i = 0; i < size; i++) {
tmp[i] = this.getModel().getElementAt(i);
itemBackup.add(tmp[i]);
}
this.removeAllItems();
this.getModel().addElement(new Object[]{"", "", 0});
for (int i = 0; i < tmp.length; i++) {
this.getModel().addElement(tmp[i]);
}
// keylistener hinzufügen
this.getEditor().getEditorComponent().addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
searchAndListEntries(((JTextField)JIntelligentComboBox.this.getEditor().getEditorComponent()).getText());
//System.out.println(((JTextField)JIntelligentComboBox.this.getEditor().getEditorComponent()).getText());
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
});
}
public JIntelligentComboBox(){
super();
}
public JIntelligentComboBox(MutableComboBoxModel aModel){
super(aModel);
init();
}
public JIntelligentComboBox(Object[] items){
super(items);
init();
}
public JIntelligentComboBox(Vector<?> items){
super(items);
init();
}
@Override
public MutableComboBoxModel getModel(){
return (MutableComboBoxModel) super.getModel();
}
private void searchAndListEntries(Object searchFor){
ArrayList<Object> found = new ArrayList<Object>();
//System.out.println("sf: "+searchFor);
for (int i = 0; i < this.itemBackup.size(); i++) {
Object tmp = this.itemBackup.get(i);
if (tmp == null || searchFor == null) continue;
Object[] o = (Object[]) tmp;
String s = (String) o[0];
if (s.matches("(?i).*" + searchFor + ".*")){
found.add(new Object[]{((Object[])tmp)[0], searchFor, ((Object[])tmp)[2]});
}
}
this.removeAllItems();
this.getModel().addElement(new Object[] {searchFor, searchFor, 0});
for (int i = 0; i < found.size(); i++) {
this.getModel().addElement(found.get(i));
}
this.setPopupVisible(true);
}
}
答案 0 :(得分:7)
我已修改了下面的sscce,我注意到了一些事情:
使用apple.laf.AquaComboBoxUI
时,您观察到的异常情况并不明显。特别是,输入和删除文本会按预期增长和缩小列表。您可以在平台上尝试修改后的代码。
我为了方便而从KeyListener
切换到KeyAdapter
,但这不是解决方案。您应该使用DocumentListener
。正如你现在所做的那样,它在使用时不会发生变异,所以我没有进一步追求这一点。
硬编码尺寸和新颖字体在其他外观上很少看起来正确感觉实施。我只是删除你的外观以显示外观。
构造函数在构造父元素后修改模型,因此结果取决于实例化的顺序。单独的模型可能更容易管理。
更新:添加了验证@ camickr solution的代码。
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Window;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JTextField;
import javax.swing.MutableComboBoxModel;
import javax.swing.SwingUtilities;
import javax.swing.plaf.basic.BasicComboBoxEditor;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
import javax.swing.plaf.basic.BasicComboPopup;
public class CBoxTest extends JFrame {
private CBoxTest() {
DefaultComboBoxModel dcm = new DefaultComboBoxModel();
StringBuilder s = new StringBuilder();
for (char i = 'a'; i < 'm'; i++) {
s.append(i);
dcm.addElement(new Object[]{s.toString(), "", 0});
}
JIntelligentComboBox icb = new JIntelligentComboBox(dcm);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.add(icb, BorderLayout.CENTER);
this.add(new JButton("Button"), BorderLayout.EAST);
this.pack();
this.setLocationRelativeTo(null);
this.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
CBoxTest cbt = new CBoxTest();
}
});
}
class JIntelligentComboBox extends JComboBox {
private List<Object> itemBackup = new ArrayList<Object>();
public JIntelligentComboBox(MutableComboBoxModel aModel) {
super(aModel);
init();
}
private void init() {
this.setRenderer(new searchRenderer());
this.setEditor(new searchComboBoxEditor());
this.setEditable(true);
int size = this.getModel().getSize();
Object[] tmp = new Object[this.getModel().getSize()];
for (int i = 0; i < size; i++) {
tmp[i] = this.getModel().getElementAt(i);
itemBackup.add(tmp[i]);
}
this.removeAllItems();
this.getModel().addElement(new Object[]{"", "", 0});
for (int i = 0; i < tmp.length; i++) {
this.getModel().addElement(tmp[i]);
}
final JTextField jtf = (JTextField) this.getEditor().getEditorComponent();
jtf.addKeyListener(new KeyAdapter() {
@Override
public void keyReleased(KeyEvent e) {
searchAndListEntries(jtf.getText());
}
});
}
@Override
public MutableComboBoxModel getModel() {
return (MutableComboBoxModel) super.getModel();
}
private void searchAndListEntries(Object searchFor) {
List<Object> found = new ArrayList<Object>();
for (int i = 0; i < this.itemBackup.size(); i++) {
Object tmp = this.itemBackup.get(i);
if (tmp == null || searchFor == null) {
continue;
}
Object[] o = (Object[]) tmp;
String s = (String) o[0];
if (s.matches("(?i).*" + searchFor + ".*")) {
found.add(new Object[]{
((Object[]) tmp)[0], searchFor, ((Object[]) tmp)[2]
});
}
}
this.removeAllItems();
this.getModel().addElement(new Object[]{searchFor, searchFor, 0});
for (int i = 0; i < found.size(); i++) {
this.getModel().addElement(found.get(i));
}
this.setPopupVisible(true);
// https://stackoverflow.com/questions/7605995
BasicComboPopup popup =
(BasicComboPopup) this.getAccessibleContext().getAccessibleChild(0);
Window popupWindow = SwingUtilities.windowForComponent(popup);
Window comboWindow = SwingUtilities.windowForComponent(this);
if (comboWindow.equals(popupWindow)) {
Component c = popup.getParent();
Dimension d = c.getPreferredSize();
c.setSize(d);
} else {
popupWindow.pack();
}
}
class searchRenderer extends BasicComboBoxRenderer {
@Override
public Component getListCellRendererComponent(JList list,
Object value, int index, boolean isSelected, boolean cellHasFocus) {
if (index == 0) {
setText("");
return this;
}
Object[] v = (Object[]) value;
String s = (String) v[0];
String lowerS = s.toLowerCase();
String sf = (String) v[1];
String lowerSf = sf.toLowerCase();
List<String> notMatching = new ArrayList<String>();
if (!sf.equals("")) {
int fs = -1;
int lastFs = 0;
while ((fs = lowerS.indexOf(lowerSf, (lastFs == 0) ? -1 : lastFs)) > -1) {
notMatching.add(s.substring(lastFs, fs));
lastFs = fs + sf.length();
}
notMatching.add(s.substring(lastFs));
}
String html = "";
if (notMatching.size() > 1) {
html = notMatching.get(0);
int start = html.length();
int sfl = sf.length();
for (int i = 1; i < notMatching.size(); i++) {
String t = notMatching.get(i);
html += "<b style=\"color: black;\">"
+ s.substring(start, start + sfl) + "</b>" + t;
start += sfl + t.length();
}
}
this.setText("<html><head></head><body style=\"color: gray;\">"
+ html + "</body></head>");
return this;
}
}
class searchComboBoxEditor extends BasicComboBoxEditor {
public searchComboBoxEditor() {
super();
}
@Override
public void setItem(Object anObject) {
if (anObject == null) {
super.setItem(anObject);
} else {
Object[] o = (Object[]) anObject;
super.setItem(o[0]);
}
}
@Override
public Object getItem() {
return new Object[]{super.getItem(), super.getItem(), 0};
}
}
}
}
答案 1 :(得分:5)
以下解决方案的基础是每次调用searchAndListRoutine
时调整弹出窗口的大小。当弹出窗口显示在父框架的边界之外时,您需要考虑弹出窗口可以显示在自己的窗口中,或者它可以显示在父框架的分层窗格上:
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Vector;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.plaf.basic.*;
import javax.swing.plaf.metal.*;
import javax.swing.plaf.basic.*;
public class JIntelligentComboBox extends JComboBox {
private ArrayList<Object> itemBackup = new ArrayList<Object>();
/** Initisiert die JIntelligentComboBox */
private void init(){
class searchComboBoxEditor extends BasicComboBoxEditor {
public searchComboBoxEditor(){
super();
}
@Override
public void setItem(Object anObject){
if (anObject == null) {
super.setItem(anObject);
} else {
Object[] o = (Object[]) anObject;
super.setItem(o[0]);
}
}
@Override
public Object getItem(){
return new Object[]{super.getItem(), super.getItem(), 0};
}
}
this.setEditor(new searchComboBoxEditor());
this.setEditable(true);
class searchRenderer extends BasicComboBoxRenderer {
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus){
if (index == 0) {
setText("");
this.setPreferredSize(new Dimension(1, 1));
return this;
}
this.setPreferredSize(new Dimension(160, 17));
if (index == list.getModel().getSize() - 1) {
this.setBorder(new EmptyBorder(0, 3, 1, 3));
} else {
this.setBorder(new EmptyBorder(0, 3, 0, 3));
}
Object[] v = (Object[]) value;
//System.out.println(v[0]);
this.setFont(new Font("Arial", Font.PLAIN, 12));
this.setBackground(Color.white);
String s = (String) v[0];
String lowerS = s.toLowerCase();
String sf = (String) v[1];
String lowerSf = sf.toLowerCase();
ArrayList<String> notMatching = new ArrayList<String>();
if (!sf.equals("")){
int fs = -1;
int lastFs = 0;
while ((fs = lowerS.indexOf((String) lowerSf, (lastFs == 0) ? -1 : lastFs)) > -1) {
notMatching.add(s.substring(lastFs, fs));
lastFs = fs + sf.length();
//System.out.println(fs+sf.length());
}
notMatching.add(s.substring(lastFs));
//System.out.println(notMatching);
}
String html = "";
if (notMatching.size() > 1) {
html = notMatching.get(0);
int start = html.length();
int sfl = sf.length();
for (int i = 1; i < notMatching.size(); i++) {
String t = notMatching.get(i);
html += "<b style=\"color: black;\">" + s.substring(start, start + sfl) + "</b>" + t;
start += sfl + t.length();
}
}
this.setText("<html><head></head><body style=\"color: gray;\">" + html + "</body></head>");
return this;
}
}
this.setRenderer(new searchRenderer());
//
int size = this.getModel().getSize();
Object[] tmp = new Object[this.getModel().getSize()];
for (int i = 0; i < size; i++) {
tmp[i] = this.getModel().getElementAt(i);
itemBackup.add(tmp[i]);
}
this.removeAllItems();
this.getModel().addElement(new Object[]{"", "", 0});
for (int i = 0; i < tmp.length; i++) {
this.getModel().addElement(tmp[i]);
}
//
this.getEditor().getEditorComponent().addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
searchAndListEntries(((JTextField)JIntelligentComboBox.this.getEditor().getEditorComponent()).getText());
//System.out.println(((JTextField)JIntelligentComboBox.this.getEditor().getEditorComponent()).getText());
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
});
}
public JIntelligentComboBox(){
super();
}
public JIntelligentComboBox(MutableComboBoxModel aModel){
super(aModel);
init();
}
public JIntelligentComboBox(Object[] items){
super(items);
init();
}
public JIntelligentComboBox(Vector<?> items){
super(items);
init();
}
@Override
public MutableComboBoxModel getModel(){
return (MutableComboBoxModel) super.getModel();
}
private void searchAndListEntries(Object searchFor){
ArrayList<Object> found = new ArrayList<Object>();
//System.out.println("sf: "+searchFor);
for (int i = 0; i < this.itemBackup.size(); i++) {
Object tmp = this.itemBackup.get(i);
if (tmp == null || searchFor == null) continue;
Object[] o = (Object[]) tmp;
String s = (String) o[0];
if (s.matches("(?i).*" + searchFor + ".*")){
found.add(new Object[]{((Object[])tmp)[0], searchFor, ((Object[])tmp)[2]});
}
}
this.removeAllItems();
this.getModel().addElement(new Object[] {searchFor, searchFor, 0});
for (int i = 0; i < found.size(); i++) {
this.getModel().addElement(found.get(i));
}
//this.setPopupVisible(true);
int size = this.getModel().getSize() - 1;
System.out.println("Elements: " + size);
if (size == 0)
{
this.setPopupVisible( false );
return;
}
this.setPopupVisible(true);
BasicComboPopup popup =
(BasicComboPopup)this.getAccessibleContext().getAccessibleChild(0);
Window popupWindow = SwingUtilities.windowForComponent(popup);
Window comboWindow = SwingUtilities.windowForComponent(this);
if (comboWindow.equals(popupWindow))
{
Component c = popup.getParent();
Dimension d = c.getPreferredSize();
c.setSize(d);
}
else
{
popupWindow.pack();
}
}
}
一个问题是,当组合框字段为空时,模型包含4个条目。我猜这是你的匹配逻辑的问题。
答案 2 :(得分:3)
答案 3 :(得分:1)
使用扩展AbstractListModel&amp;的ComboboxModel中的Vector数组面临同样的问题。 实现MutableComboBoxModel。使用setMaximumRowCount:
解决迭代数据库值并将其保存到 public ArrayList listInCombobox = new ArrayList();
myComboBox.setMaximumRowCount(listInCombobox.size());
在myComboBox MouseListener(mousePressed)中执行上述操作。
答案 4 :(得分:-2)