Hi Martijn,
Thanks for your suggestion,and I made a model for myself,but I
encountered another issue.
So would you please tell me how can I or which method can set the value
loaded from DB to the PropertySelection component while I could do nothing
for setting the value back to UI.
Regards,
Ryan.
2005/12/22, Martijn Hinten <[EMAIL PROTECTED]>:
>
> You will have to create yout own implementation of
> IPropertySelectionModel, of which several are available via the WIKI.
> Also see pages 141, 142 of Tapestry in Action.
>
> This is what I created myself and is working fine. The only
> bug/feature is that the value to which the PropertySelection
> component is bound *has* to be a String.
>
> The constructor of ValueLabelPropertySelectionModel accepts any List
> of Objects that either implement the IValueLabel interface (which
> should serve your needs) or are just plain Strings. In the latter
> case the value and label in the poplist will be the same.
>
> Good luck,
> Martijn
>
> public class ValueLabelPropertySelectionModel implements
> IPropertySelectionModel {
>
> /**
> * The list of options held by this poplist<br/> Options can be: -
> Strings or
> * objects that implement IValueLabel
> *
> */
> List _options;
>
> Map _optionsMap;
>
>
> public ValueLabelPropertySelectionModel() {
> }
>
>
> public ValueLabelPropertySelectionModel(List l) {
> set_options(l);
> if( _options != null ) {
> _optionsMap = new HashMap();
> for( int i = 0; i < _options.size(); i++ ) {
> Object option = _options.get(i);
>
> if( option instanceof IValueLabel ) {
> IValueLabel vl = (IValueLabel)_options.get(i);
> // _optionsMap.put(vl.getValue(), vl.getLabel());
> _optionsMap.put(vl.getValue(), vl);
> } else {
> _optionsMap.put(option.toString(), option.toString());
> }
> }
> }
> }
>
>
> /**
> * @see
> org.apache.tapestry.form.IPropertySelectionModel#getOptionCount()
> */
> public int getOptionCount() {
> if( _options == null ) {
> return 0;
> } else {
> return _options.size();
> }
> }
>
>
> /**
> * @see
> org.apache.tapestry.form.IPropertySelectionModel#getOption(int)
> */
> public Object getOption(int i) {
> if( _options == null ) {
> return null;
> } else {
> Object option = _options.get(i);
> if( option instanceof IValueLabel ) {
> return ((IValueLabel)option).getValue();
> // return option;
> } else {
> return option;
> }
> }
> }
>
>
> /**
> * @see
> org.apache.tapestry.form.IPropertySelectionModel#getLabel(int)
> */
> public String getLabel(int i) {
> if( _options == null ) {
> return null;
> } else {
> Object option = _options.get(i);
> if( option instanceof IValueLabel ) {
> return ((IValueLabel)option).getLabel();
> } else {
> return option.toString();
> }
> }
>
> }
>
>
> /**
> * @see
> org.apache.tapestry.form.IPropertySelectionModel#getValue(int)
> */
> public String getValue(int i) {
> if( _options == null ) {
> return null;
> } else {
> Object option = _options.get(i);
> if( option instanceof IValueLabel ) {
> return ((IValueLabel)option).getValue();
> } else {
> return option.toString();
> }
> }
>
> }
>
>
> /**
> * @see
> org.apache.tapestry.form.IPropertySelectionModel#translateValue(java.l
> ang.String)
> */
> public Object translateValue(String value) {
> if( _options == null ) {
> return null;
> } else {
> Object o = _optionsMap.get(value);
> if( o instanceof IValueLabel ) {
> return ((IValueLabel)o).getValue();
> } else {
> return _optionsMap.get(value);
> }
> }
> }
>
>
> /**
> * @return Returns the _options.
> */
> public List get_options() {
> return _options;
> }
>
>
> /**
> * @param _options The _options to set.
> */
> public void set_options(List _options) {
> this._options = _options;
> }
>
>
> public interface IValueLabel {
>
> public String getLabel();
> public String getValue();
>
> }
>
>
> public class ValueLabel implements IValueLabel{
>
> String label;
> String value;
>
> public ValueLabel(String l, String v){
>
> setLabel(l);
> setValue(v);
>
> }
>
> public void setLabel(String label) {
> this.label = label;
> }
>
> public void setValue(String value) {
> this.value = value;
> }
>
> public String getLabel() {
>
> return label;
> }
>
> public String getValue() {
>
> return value;
> }
>
> }
>
>
> ---- Original Message ----
> From: [EMAIL PROTECTED]
> To: [email protected]
> Subject: RE: selection problem
> Date: Thu, 22 Dec 2005 18:33:11 +0800
>
> >Hi all,
> > I have a issue about using PropertySelection component.
> > So I wanna whether can PropertySelection seperate his list value
> >and
> >list key.Because I may need to display the value,while using the key
> >of the
> >selection.
> > So is there any one who know how to do?
> >
> >Thanks,
> >Ryan.
>
>
>
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