转贴 Swt/Jface tableViewer入门教程三(加入在表格上直接编辑数据)
前边实现了一个表格的基本功能,但这并不够好,能否为表格实现一些更好的功能呢?答案是肯定的。下边我们来加入直接编辑的功能。
一、要实现这个功能必须提供一个实现ICellModifier的类。内容如下
import
org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.widgets.TableItem;
public class MyCellModifier implements ICellModifier {
private TableViewer tv;
public static String[] NAMES ={"张三","李四","小红","翠花"};
public MyCellModifier(TableViewer tv){
this.tv = tv;
}
public boolean canModify(Object element, String property) {
return true;
}
public Object getValue(Object element, String property) {
People p = (People)element;
if(property.equals("name")){
return new Integer(getNameIndex(p.getName()));
}else if(property.equals("sex")){
return new Boolean(p.getSex().equals("男"));
}else if(property.equals("age")){
return String.valueOf(p.getAge());
}
throw new RuntimeException("error column name : " + property);
}
private int getNameIndex(String name){
for(int i=0;i<NAMES.length;i++){
if(NAMES[i].equals(name)){
return i;
}
}
return -1;
}
public void modify(Object element, String property, Object value) {
TableItem item = (TableItem)element;
People p = (People)item.getData();
if (property.equals("name")){
Integer comboIndex = (Integer)value;
if(comboIndex.intValue() == -1){
return ;
}
String newName = NAMES[comboIndex.intValue()];
p.setName(newName);
}else if(property.equals("sex")){
Boolean newValue = (Boolean)value;
System.out.println(newValue);
if(newValue.booleanValue()){
p.setSex("男");
}else{
p.setSex("女");
}
}else if (property.equals("age")){
String newValue = (String)value;
if(newValue.equals("")){
return ;
}
Integer newAge = new Integer(newValue);
p.setAge(newAge);
}else{
throw new RuntimeException("错误列名:" + property);
}
tv.update(p, null);
}
}
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.widgets.TableItem;
public class MyCellModifier implements ICellModifier {
private TableViewer tv;
public static String[] NAMES ={"张三","李四","小红","翠花"};
public MyCellModifier(TableViewer tv){
this.tv = tv;
}
public boolean canModify(Object element, String property) {
return true;
}
public Object getValue(Object element, String property) {
People p = (People)element;
if(property.equals("name")){
return new Integer(getNameIndex(p.getName()));
}else if(property.equals("sex")){
return new Boolean(p.getSex().equals("男"));
}else if(property.equals("age")){
return String.valueOf(p.getAge());
}
throw new RuntimeException("error column name : " + property);
}
private int getNameIndex(String name){
for(int i=0;i<NAMES.length;i++){
if(NAMES[i].equals(name)){
return i;
}
}
return -1;
}
public void modify(Object element, String property, Object value) {
TableItem item = (TableItem)element;
People p = (People)item.getData();
if (property.equals("name")){
Integer comboIndex = (Integer)value;
if(comboIndex.intValue() == -1){
return ;
}
String newName = NAMES[comboIndex.intValue()];
p.setName(newName);
}else if(property.equals("sex")){
Boolean newValue = (Boolean)value;
System.out.println(newValue);
if(newValue.booleanValue()){
p.setSex("男");
}else{
p.setSex("女");
}
}else if (property.equals("age")){
String newValue = (String)value;
if(newValue.equals("")){
return ;
}
Integer newAge = new Integer(newValue);
p.setAge(newAge);
}else{
throw new RuntimeException("错误列名:" + property);
}
tv.update(p, null);
}
}
二、好了,有了这个类,下一部就是如何把它和TestTableViewer关联起来,在TestTableViewer中setInput()后加入如下内容
tableViewer.setColumnProperties(
new
String[]
{"id","name","sex","age","createDate"}
);
CellEditor[] cellEditor = new CellEditor[ 5 ];
cellEditor[ 0 ] = null ;
cellEditor[ 1 ] = new ComboBoxCellEditor(tableViewer.getTable(),MyCellModifier.NAMES,SWT.READ_ONLY);
cellEditor[ 2 ] = new CheckboxCellEditor(tableViewer.getTable());
cellEditor[ 3 ] = new TextCellEditor(tableViewer.getTable());
cellEditor[ 4 ] = null ;
tableViewer.setCellEditors(cellEditor);
ICellModifier modifier = new MyCellModifier(tableViewer);
tableViewer.setCellModifier(modifier);
我们让名字这一列用下拉条来编辑,让性别这一列变成类似checkbox的操作,让年龄这一类变成直接输入
CellEditor[] cellEditor = new CellEditor[ 5 ];
cellEditor[ 0 ] = null ;
cellEditor[ 1 ] = new ComboBoxCellEditor(tableViewer.getTable(),MyCellModifier.NAMES,SWT.READ_ONLY);
cellEditor[ 2 ] = new CheckboxCellEditor(tableViewer.getTable());
cellEditor[ 3 ] = new TextCellEditor(tableViewer.getTable());
cellEditor[ 4 ] = null ;
tableViewer.setCellEditors(cellEditor);
ICellModifier modifier = new MyCellModifier(tableViewer);
tableViewer.setCellModifier(modifier);
ok,尝试一下。
三、问题出现,如果年龄的地方我们输入一个非数字呢,所以为了安全起见,我们加入一个验证器,禁止用户输入非数字
在上边的内容下加入
Text text
=
(Text)cellEditor[
3
].getControl();
text.addVerifyListener( new VerifyListener() {
public void verifyText(VerifyEvent e){
String inStr = e.text;
if (inStr.length() > 0){
try{
Integer.parseInt(inStr);
e.doit = true;
}catch(Exception ep){
e.doit = false;
}
}
}
} );
好了,再试试是否不能输入非整数了?解决。其实还是有些问题的,试着输入个0,呵呵。这里就需要你自己按照自己的实际需求来实现了。
text.addVerifyListener( new VerifyListener() {
public void verifyText(VerifyEvent e){
String inStr = e.text;
if (inStr.length() > 0){
try{
Integer.parseInt(inStr);
e.doit = true;
}catch(Exception ep){
e.doit = false;
}
}
}
} );
但作为demo这个的目的已经达到了。
source下载: http://www.blogjava.net/Files/dreamstone/jface-3.rar