如何使用所选对象维护 Wicket 中的第二个项目列表 'ListMultipleChoice'
How to maintain the second list of items 'ListMultipleChoice' in Wicket with the selected objects
我有 10 个国家/地区的第一个列表,当我单击一个国家/地区时,另一个列表将由单击该国家/地区的州填充...我 select 例如 4 个州...我'将在国家/地区和 select 另一个国家/地区的列表中,这里出现了问题... select 国家的离子丢失了...。
更新国家/地区列表后,有什么办法可以保留这个 selection 吗? .
这是我的代码:
private List<Country> selectedCountry;
private List<Country> selectedState;
.
.
List listCountry=countryService.assembleList();
ListMultipleChoice listMultiplaCountry = new ListMultipleChoice("multipleCountry",new PropertyModel(this, "selectedCountry"),listCountry,new ChoiceRenderer<Country>("nameCountry"));
ListMultipleChoice listStates= = new ListMultipleChoice("selectedStates",new PropertyModel(this, "selectedState"),listAllStates,new ChoiceRenderer<States>("nameState"));
acaoAdicionarMunicipio(listMultiplaUfs);
.
代码是 运行,不要放在示例中,但我正在过滤国家 selected 国家,这个 100%,因为我发布了问题发生在我有州列表选择另一个国家,然后我 selected 失去 selection.
这是我的 2 美分:我所做的就是将选定的选项存储到某个变量中,然后在国家选择更改时为州重置这些选项。
public class TestPage3 extends WebPage {
FeedbackPanel feedbackPanel;
Set<String> selectedStates = new HashSet<String>();
Set<String> selectedCountries = new HashSet<String>();
Set<String> allStatesSelected = new HashSet<String>();
public TestPage3(final PageParameters parameters) {
feedbackPanel = new FeedbackPanel("feedback");
feedbackPanel.setOutputMarkupId(true);
add(feedbackPanel);
Form<Void> form = new Form<Void>("form");
add(form);
addFormComponents(form);
}
private void addFormComponents(Form<Void> form) {
ListMultipleChoice<String> statesSelection = addStatesMultipleChoicesBox(form);
ListMultipleChoice<String> countriesSelection = addCountryMultipleChoiceBox(form, statesSelection);
}
private ListMultipleChoice<String> addCountryMultipleChoiceBox(Form<Void> form, final ListMultipleChoice<String> statesSelection) {
final Map<String, String> countryMap = new HashMap<String, String>();
countryMap.put("US", "United States of America");
countryMap.put("IN", "India");
countryMap.put("JA", "Japan");
countryMap.put("AA", "AA");
countryMap.put("BB", "BB");
final ListMultipleChoice<String> choices = new ListMultipleChoice<String>("countries", new PropertyModel<Collection<String>>(this, "selectedCountries"), new ArrayList<String>(countryMap.keySet()));
choices.add(new AjaxFormComponentUpdatingBehavior("onchange") {
@Override
protected void onUpdate(AjaxRequestTarget target) {
if (allStatesSelected != null && allStatesSelected.size() > 0){
statesSelection.setChoices(new ArrayList<String>(allStatesSelected));
target.add(statesSelection);
}
}
});
choices.setOutputMarkupId(true);
form.add(choices);
return choices;
}
private ListMultipleChoice<String> addStatesMultipleChoicesBox(Form<Void> form) {
final Map<String, String> statesMap = new HashMap<String, String>();
statesMap.put("AK", "Arkansas");
statesMap.put("FL", "Florida");
statesMap.put("IL", "Illinois");
statesMap.put("SA", "State A");
statesMap.put("SB", "State B");
statesMap.put("SC", "State C");
statesMap.put("SD", "State D");
final ListMultipleChoice<String> choices = new ListMultipleChoice<String>("states", new PropertyModel<Collection<String>>(this, "selectedStates"), new ArrayList<String>(statesMap.keySet())){
@Override
protected void onModelChanged() {
for (String selectedState : selectedStates){
allStatesSelected.add(selectedState);
}
}
};
choices.setOutputMarkupId(true);
form.add(choices);
return choices;
}
public Set<String> getSelectedStates() {
return selectedCountries;
}
public void setSelectedStates(Set<String> selectedStates) {
this.selectedCountries = selectedStates;
}
public Set<String> getSelectedCountries() {
return selectedCountries;
}
public void setSelectedCountries(Set<String> selectedCountries) {
this.selectedCountries = selectedCountries;
}
}
标记:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns:wicket>
<head>
</head>
<body>
<div wicket:id="feedback"></div>
<form wicket:id="form">
<select wicket:id="countries"></select>
<select wicket:id="states"></select>
</form>
</body>
</html>
我有 10 个国家/地区的第一个列表,当我单击一个国家/地区时,另一个列表将由单击该国家/地区的州填充...我 select 例如 4 个州...我'将在国家/地区和 select 另一个国家/地区的列表中,这里出现了问题... select 国家的离子丢失了...。
更新国家/地区列表后,有什么办法可以保留这个 selection 吗? .
这是我的代码:
private List<Country> selectedCountry;
private List<Country> selectedState;
.
.
List listCountry=countryService.assembleList();
ListMultipleChoice listMultiplaCountry = new ListMultipleChoice("multipleCountry",new PropertyModel(this, "selectedCountry"),listCountry,new ChoiceRenderer<Country>("nameCountry"));
ListMultipleChoice listStates= = new ListMultipleChoice("selectedStates",new PropertyModel(this, "selectedState"),listAllStates,new ChoiceRenderer<States>("nameState"));
acaoAdicionarMunicipio(listMultiplaUfs);
.
代码是 运行,不要放在示例中,但我正在过滤国家 selected 国家,这个 100%,因为我发布了问题发生在我有州列表选择另一个国家,然后我 selected 失去 selection.
这是我的 2 美分:我所做的就是将选定的选项存储到某个变量中,然后在国家选择更改时为州重置这些选项。
public class TestPage3 extends WebPage {
FeedbackPanel feedbackPanel;
Set<String> selectedStates = new HashSet<String>();
Set<String> selectedCountries = new HashSet<String>();
Set<String> allStatesSelected = new HashSet<String>();
public TestPage3(final PageParameters parameters) {
feedbackPanel = new FeedbackPanel("feedback");
feedbackPanel.setOutputMarkupId(true);
add(feedbackPanel);
Form<Void> form = new Form<Void>("form");
add(form);
addFormComponents(form);
}
private void addFormComponents(Form<Void> form) {
ListMultipleChoice<String> statesSelection = addStatesMultipleChoicesBox(form);
ListMultipleChoice<String> countriesSelection = addCountryMultipleChoiceBox(form, statesSelection);
}
private ListMultipleChoice<String> addCountryMultipleChoiceBox(Form<Void> form, final ListMultipleChoice<String> statesSelection) {
final Map<String, String> countryMap = new HashMap<String, String>();
countryMap.put("US", "United States of America");
countryMap.put("IN", "India");
countryMap.put("JA", "Japan");
countryMap.put("AA", "AA");
countryMap.put("BB", "BB");
final ListMultipleChoice<String> choices = new ListMultipleChoice<String>("countries", new PropertyModel<Collection<String>>(this, "selectedCountries"), new ArrayList<String>(countryMap.keySet()));
choices.add(new AjaxFormComponentUpdatingBehavior("onchange") {
@Override
protected void onUpdate(AjaxRequestTarget target) {
if (allStatesSelected != null && allStatesSelected.size() > 0){
statesSelection.setChoices(new ArrayList<String>(allStatesSelected));
target.add(statesSelection);
}
}
});
choices.setOutputMarkupId(true);
form.add(choices);
return choices;
}
private ListMultipleChoice<String> addStatesMultipleChoicesBox(Form<Void> form) {
final Map<String, String> statesMap = new HashMap<String, String>();
statesMap.put("AK", "Arkansas");
statesMap.put("FL", "Florida");
statesMap.put("IL", "Illinois");
statesMap.put("SA", "State A");
statesMap.put("SB", "State B");
statesMap.put("SC", "State C");
statesMap.put("SD", "State D");
final ListMultipleChoice<String> choices = new ListMultipleChoice<String>("states", new PropertyModel<Collection<String>>(this, "selectedStates"), new ArrayList<String>(statesMap.keySet())){
@Override
protected void onModelChanged() {
for (String selectedState : selectedStates){
allStatesSelected.add(selectedState);
}
}
};
choices.setOutputMarkupId(true);
form.add(choices);
return choices;
}
public Set<String> getSelectedStates() {
return selectedCountries;
}
public void setSelectedStates(Set<String> selectedStates) {
this.selectedCountries = selectedStates;
}
public Set<String> getSelectedCountries() {
return selectedCountries;
}
public void setSelectedCountries(Set<String> selectedCountries) {
this.selectedCountries = selectedCountries;
}
}
标记:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns:wicket>
<head>
</head>
<body>
<div wicket:id="feedback"></div>
<form wicket:id="form">
<select wicket:id="countries"></select>
<select wicket:id="states"></select>
</form>
</body>
</html>