Java 自定义表模型不工作
我编写了一个自定义表格模型。它的目标是将值绑定到列表。此列表在整个应用程序中使用。如果在表中进行了更改,则该更改也会反映在应用程序中的任何其他位置。我的问题是,我的表JTable不显示行 这是我的第一个自定义表格模型,所以我不确定是否遗漏了什么 该表是使用以下代码创建的:Java 自定义表模型不工作,java,swing,jtable,tablemodel,abstracttablemodel,Java,Swing,Jtable,Tablemodel,Abstracttablemodel,我编写了一个自定义表格模型。它的目标是将值绑定到列表。此列表在整个应用程序中使用。如果在表中进行了更改,则该更改也会反映在应用程序中的任何其他位置。我的问题是,我的表JTable不显示行 这是我的第一个自定义表格模型,所以我不确定是否遗漏了什么 该表是使用以下代码创建的: public CBTable(List<T> elements, Class<T> classType) { super(new BindingTableModel(elements));
public CBTable(List<T> elements, Class<T> classType) {
super(new BindingTableModel(elements));
this.tableModel = (BindingTableModel<T>) getModel();
this.classType = classType;
setBindings();
repaint();
}
实际模型本身是这样的:
public class BindingTableModel<T> extends AbstractTableModel implements TableModel {
private List<T> elements;
private List<BindingTableModelInfo> bindingInfo;
private Map<Point, Object> valueMap;
public BindingTableModel(List<T> elements) {
this.elements = elements;
this.bindingInfo = new ArrayList<>();
valueMap = new HashMap<>();
bind();
for(int i = 0; i < getRowCount(); i++){
fireTableRowsInserted(i, i);
}
fireTableStructureChanged();
}
public void addBindingInfo(String propertyName, String columnName, Class colClass, boolean isEditable) {
bindingInfo.add(new BindingTableModelInfo(propertyName,
columnName,
colClass,
isEditable));
}
private void bind() {
for (int col = 0; col < getColumnCount(); col++) {
for (int row = 0; row < getRowCount(); row++) {
getValueAt(row, col);//this will init the map
}
}
}
public void addElement(T element){
elements.add(element);
}
public List<T> getElements(){
return elements;
}
public void removeElement(T element){
int index = elements.indexOf(element);
elements.remove(element);
fireTableRowsDeleted(index, index);
}
@Override
public int getRowCount() {
return elements.size();
}
@Override
public int getColumnCount() {
return bindingInfo.size();
}
@Override
public String getColumnName(int i) {
return bindingInfo.get(i).getColumnName();
}
@Override
public Class<?> getColumnClass(int i) {
return bindingInfo.get(i).getColumnClass();
}
@Override
public boolean isCellEditable(int row, int col) {
return bindingInfo.get(col).isIsEditable();
}
@Override
public Object getValueAt(int row, int col) {
Point point = new Point(row, col);
if (valueMap.containsKey(point)) {
return valueMap.get(point);
}
String property = bindingInfo.get(col).getProperty();
Class classType = bindingInfo.get(col).getColumnClass();
T element = elements.get(row);
Object retVal = Pojo.getValueByName(classType, element, property);
valueMap.put(point, retVal);
return retVal;
}
@Override
public void setValueAt(Object value, int row, int col) {
Point point = new Point(row, col);
if (valueMap.containsKey(point)) {
Object oldValue = valueMap.get(point);
if (oldValue != null && oldValue.equals(value)) {
return;
}
}
String property = bindingInfo.get(col).getProperty();
Class classType = bindingInfo.get(col).getColumnClass();
T element = elements.get(row);
Pojo.setValueByName(classType, element, property, value);
}
}
公共类BindingTableModel扩展AbstractTableModel实现TableModel{
私有列表元素;
私有列表绑定信息;
私人地图价值地图;
公共BindingTableModel(列表元素){
这个元素=元素;
this.bindingInfo=newArrayList();
valueMap=newhashmap();
bind();
对于(int i=0;i
确保fireTableCellUpdated()
或其他适当的事件;这通常是在setValueAt()的实现中完成的。
:
完整的例子都可以看到。你在哪里
fireTable*Updated()
?这是个好问题,我不知道。这通常发生在哪里?@trashgood我在模型的构造函数中添加了火灾事件。无影响:(在构造函数中创建一个“tableModel”变量,然后使用一个“dataModel”变量设置表的模型。我认为这是错误的。在构造函数中不需要fireXXX事件,表。setModel(…)将导致重新绘制表。但是,您确实需要调用fireXXX(…)更新TableModel中数据的其他方法中的语句,例如setValueAt(…)方法。@user489041:我已经在下面详细阐述了。
public class BindingTableModel<T> extends AbstractTableModel implements TableModel {
private List<T> elements;
private List<BindingTableModelInfo> bindingInfo;
private Map<Point, Object> valueMap;
public BindingTableModel(List<T> elements) {
this.elements = elements;
this.bindingInfo = new ArrayList<>();
valueMap = new HashMap<>();
bind();
for(int i = 0; i < getRowCount(); i++){
fireTableRowsInserted(i, i);
}
fireTableStructureChanged();
}
public void addBindingInfo(String propertyName, String columnName, Class colClass, boolean isEditable) {
bindingInfo.add(new BindingTableModelInfo(propertyName,
columnName,
colClass,
isEditable));
}
private void bind() {
for (int col = 0; col < getColumnCount(); col++) {
for (int row = 0; row < getRowCount(); row++) {
getValueAt(row, col);//this will init the map
}
}
}
public void addElement(T element){
elements.add(element);
}
public List<T> getElements(){
return elements;
}
public void removeElement(T element){
int index = elements.indexOf(element);
elements.remove(element);
fireTableRowsDeleted(index, index);
}
@Override
public int getRowCount() {
return elements.size();
}
@Override
public int getColumnCount() {
return bindingInfo.size();
}
@Override
public String getColumnName(int i) {
return bindingInfo.get(i).getColumnName();
}
@Override
public Class<?> getColumnClass(int i) {
return bindingInfo.get(i).getColumnClass();
}
@Override
public boolean isCellEditable(int row, int col) {
return bindingInfo.get(col).isIsEditable();
}
@Override
public Object getValueAt(int row, int col) {
Point point = new Point(row, col);
if (valueMap.containsKey(point)) {
return valueMap.get(point);
}
String property = bindingInfo.get(col).getProperty();
Class classType = bindingInfo.get(col).getColumnClass();
T element = elements.get(row);
Object retVal = Pojo.getValueByName(classType, element, property);
valueMap.put(point, retVal);
return retVal;
}
@Override
public void setValueAt(Object value, int row, int col) {
Point point = new Point(row, col);
if (valueMap.containsKey(point)) {
Object oldValue = valueMap.get(point);
if (oldValue != null && oldValue.equals(value)) {
return;
}
}
String property = bindingInfo.get(col).getProperty();
Class classType = bindingInfo.get(col).getColumnClass();
T element = elements.get(row);
Pojo.setValueByName(classType, element, property, value);
}
}
@Override
public void setValueAt(Object value, int row, int col) {
…
fireTableCellUpdated(row, col);
}