将不可编辑的JTable行动态设置为可编辑
问题描述:
我扩展了AbstractTableModel类以使我的JTable不可编辑,期望第一行。顺便说一下,我已经重写了isCellEditable(int row,int col)方法。通过放置一个整数变量,使nextRow激活,我得到了第一行尊重我的creterias.So,问题是使下一行当前行第零列中的单元格由用户填充(数据已更改且必须具有值)时激活.Her是迄今为止的代码。将不可编辑的JTable行动态设置为可编辑
package MODEL.tableModel;
import MODEL.Produit;
import MODEL.ProduitInBonDachat;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;
public class BonDachatTableModel extends AbstractTableModel implements TableModelListener {
private String headerTitle[] = {"Designation", "Qté", "Prix Unitaire", "Sous Total"};
private List<ProduitInBonDachat> data;
// variable that hold the next
private int nextActiveRow = 0;
public BonDachatTableModel() {
data = new ArrayList<ProduitInBonDachat>();
}
@Override
public String getColumnName(int i) {
return headerTitle[i];
}
@Override
public int getRowCount() {
return 10;
}
@Override
public int getColumnCount() {
return headerTitle.length;
}
public void tableChanged(TableModelEvent event) {
int col = event.getColumn();
int fRow = event.getFirstRow();
if ((col == 1) && (col == 2)) {
setValueAt(getValueAt(fRow, col), fRow, col);
fireTableCellUpdated(fRow, col);
}
}
public Object getValueAt(int row, int col) {
try {
data.get(row);
} catch (IndexOutOfBoundsException e) {
return null;
}
ProduitInBonDachat pInBonDachat = data.get(row);
switch (col) {
case 0:
if (pInBonDachat.getDesignationProduit() == null) {
return null;
}
if(!pInBonDachat.getDesignationProduit().isEmpty()){
nextActiveRow++ ;
fireTableCellUpdated(row, col);
}
return pInBonDachat.getDesignationProduit();
case 1:
if (pInBonDachat.getQte() == null) {
return null;
}
return pInBonDachat.getQte();
case 2:
if (pInBonDachat.getPrixDeVente() == null) {
return null;
}
return pInBonDachat.getPrixDeVente();
case 3:
if (pInBonDachat.getPrixDeVente() == null || pInBonDachat.getQte() == null) {
return null;
}
return pInBonDachat.getQte().multiply(pInBonDachat.getPrixDeVente());
default:
return null;
}
}
public boolean isCellEditable(int row, int col) {
if(col == 1 || col == 2 || row == nextActiveRow)
return true;
else
return false ;
}
@Override
public void setValueAt(Object value, int row, int col) {
ProduitInBonDachat tableEtry;
try {
tableEtry = data.get(row);
} catch (IndexOutOfBoundsException e) {
tableEtry = new ProduitInBonDachat();
data.add(row, tableEtry);
}
switch (col) {
case 0:
tableEtry.setDesignationProduit((String) value);
nextRowActive();
fireTableCellUpdated(int row, int col);
break;
case 1:
tableEtry.setQte((BigDecimal) value);
break;
case 2:
tableEtry.setPrixDeVente((BigDecimal) value);
break;
default:
super.setValueAt(value, row, col);
}
}
@Override
public Class<?> getColumnClass(int col) {
switch (col) {
case 0:
return String.class;
case 1:
return BigDecimal.class;
case 2:
return BigDecimal.class;
case 3:
return BigDecimal.class;
default:
return super.getColumnClass(col);
}
}
public void nextRowActive(){
nextActiveRow++;
}
}
答
基本上,当前的方法将返回false
如果当前列不是0
,否则将返回true
也许像...
public boolean isCellEditable(int row, int col) {
boolean isEditable = false;
System.out.println("update cell edittable");
if(col != 0 && row == nextActiveRow){
isEditable = true;
}
return isEditable;
}
会做得更好...
要更新nextActiveRow
值,您需要验证当前的有效性行,什么时候适合,例如更新变量...
public void setValueAt(Object value, int row, int col) {
ProduitInBonDachat tableEtry;
try {
tableEtry = data.get(row);
switch (col) {
case 0:
tableEtry.setDesignationProduit((String) value);
break;
case 1:
tableEtry.setQte((BigDecimal) value);
break;
case 2:
tableEtry.setPrixDeVente((BigDecimal) value);
break;
}
fireTableCellUpdated(row, col);
if (row == nextActiveRow && activeRowIsVaid()) {
nextRowActive();
}
} catch (IndexOutOfBoundsException e) {
// IMHO, this is not an appropriate action for the
// setValueAt method, as the contract suggest that you are
// editing an existing row, instead provide a method in your model
// which is responsible for inserting/adding new rows
//tableEtry = new ProduitInBonDachat();
//data.add(row, tableEtry);
// don't forget to fireRowInserted!
}
}
+0
谢谢你我工作。 –
答
这里是解决方案,为我工作,由行,当第一列被填满启动的行JTable中。
package MODEL.tableModel;
import MODEL.Produit;
import MODEL.ProduitInBonDachat;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;
public class BonDachatTableModel extends AbstractTableModel implements TableModelListener {
private String headerTitle[] = {"Designation", "Qté", "Prix Unitaire", "Sous Total"};
private List<ProduitInBonDachat> data;
private int nextActiveRow = 0;
public BonDachatTableModel() {
data = new ArrayList<ProduitInBonDachat>();
}
@Override
public String getColumnName(int i) {
return headerTitle[i];
}
@Override
public int getRowCount() {
return 10;
}
@Override
public int getColumnCount() {
return headerTitle.length;
}
public void tableChanged(TableModelEvent event) {
int col = event.getColumn();
int fRow = event.getFirstRow();
if ((col == 1) && (col == 2)) {
setValueAt(getValueAt(fRow, col), fRow, col);
fireTableCellUpdated(fRow, col);
}
}
public Object getValueAt(int row, int col) {
try {
data.get(row);
} catch (IndexOutOfBoundsException e) {
return null;
}
ProduitInBonDachat pInBonDachat = data.get(row);
switch (col) {
case 0:
if (pInBonDachat.getDesignationProduit() == null) {
return null;
}
return pInBonDachat.getDesignationProduit();
case 1:
if (pInBonDachat.getQte() == null) {
return null;
}
return pInBonDachat.getQte();
case 2:
if (pInBonDachat.getPrixDeVente() == null) {
return null;
}
return pInBonDachat.getPrixDeVente();
case 3:
if (pInBonDachat.getPrixDeVente() == null || pInBonDachat.getQte() == null) {
return null;
}
return pInBonDachat.getQte().multiply(pInBonDachat.getPrixDeVente());
default:
return null;
}
}
public boolean isCellEditable(int row, int col) {
if (col == 0 && row <= nextActiveRow) {
return true;
}
if (col == 1 && row <= nextActiveRow) {
return true;
}
if (col == 2 && row <= nextActiveRow) {
return true;
}
return false;
}
@Override
public void setValueAt(Object value, int row, int col) {
ProduitInBonDachat tableEtry;
try {
tableEtry = data.get(row);
} catch (IndexOutOfBoundsException e) {
tableEtry = new ProduitInBonDachat();
data.add(row, tableEtry);
}
switch (col) {
case 0:
String valueCast = (String) value;
if (valueCast.isEmpty()) {
break;
}
nextActiveRow++;
tableEtry.setDesignationProduit((String) value);
break;
case 1:
tableEtry.setQte((BigDecimal) value);
break;
case 2:
tableEtry.setPrixDeVente((BigDecimal) value);
break;
default:
super.setValueAt(value, row, col);
}
fireTableCellUpdated(row, col);
}
@Override
public Class<?> getColumnClass(int col) {
switch (col) {
case 0:
return String.class;
case 1:
return BigDecimal.class;
case 2:
return BigDecimal.class;
case 3:
return BigDecimal.class;
default:
return super.getColumnClass(col);
}
}
public void nextRowActive() {
nextActiveRow++;
}
}
查看“isCellEditable”方法中的最后一个“返回true”吗?这意味着如果它不是第一列而不是nextActiveRow,那么单元格将可编辑... – MadProgrammer
我已更改isCellEditable(int row,int col);方法,但我的问题是增加nextActiveRow变量只有当(nextActiveRow,0)中的单元格填充一些值,所以nextActiveRow ++变得可编辑。 –
在这种情况下,当调用'setValueAt'时,您需要对当前行的有效性进行评估,并相应地更新'nextActiveRow' ... – MadProgrammer