我的wicket面板需要至少两次点击才能使用我的按钮的onSubmit方法更新任一CheckBoxMulitpleChoice组件。如何在第一次点击时更新这些组件？
我使用两个CheckBoxMultipleChoice组件来编译要通知的用户列表。第一个是根据DropDownChoice团队选择中可用的用户填充的。然后，用户可以从该团队中选择用户以添加到第二CheckBoxMultipleChoice，其显示要通知的所有用户并允许用户移除用户。
我尝试使用Palette组件，但是使用的是wicket 1.3.1（我遇到了迁移到1.4的麻烦，但这是另一篇文章）并且还没有成功控制UI。我也尝试将组件放在表单中，但这并没有改变功能。它需要至少2次单击才能从复选框中添加或删除条目。似乎getValue（）直到执行了按钮行为后才更新。
// Team selection for notification =================================
final DropDownChoice teamNotificationChoice = new DropDownChoice("teamNotification", teamList, new IChoiceRenderer() {
public Object getDisplayValue(Object o) {
return ((Team) o).getName();
}
public String getIdValue(Object o, int i) {
return Long.toString(((Team) o).getId());
}
});
notifySelectionList.add(teamNotificationChoice);
// teamUser selection list for notification ========================
List<ItemUser> choices = UserUtils.convertToItemUserListFromUsers(getJtrac().findUsersForSpace(space.getId()));
teamUsers = new CheckBoxMultipleChoice("teamUsers", choices, new IChoiceRenderer() {
public Object getDisplayValue(Object o) {
return ((ItemUser) o).getUser().getName();
}
public String getIdValue(Object o, int i) {
return ((ItemUser) o).getUser().getLoginName();
}
});
notifySelectionList.add(teamUsers);
// Add selected teamUsers button ===================================
Button button = new Button("addUsersToList") {
@Override
public void onSubmit(){
}
};
button.add(new AjaxFormComponentUpdatingBehavior("onClick") {
protected void onUpdate(AjaxRequestTarget target) {
List choices = teamUsers.getChoices();
String value = teamUsers.getValue();
for (int index = 0; index < choices.size(); index++) {
final ItemUser choice = (ItemUser) choices.get(index);
if(isSelected(choice, index, value)&!userSelection.contains(choice)) {
userSelection.add(choice);
}
}
SortUtils.sortItemUsers(userSelection);
itemUsers.setChoices(userSelection);
target.addComponent(itemUsers);
}
});
notifySelectionList.add(button);
notifySelectionList.setOutputMarkupId(true);
// notify list ===================================================
itemUsers = new CheckBoxMultipleChoice("itemUsers", userSelection, new IChoiceRenderer() {
public Object getDisplayValue(Object o) {
return ((ItemUser) o).getUser().getName();
}
public String getIdValue(Object o, int i) {
return ((ItemUser) o).getUser().getLoginName();
}
});
itemUsers.setMaxRows(10);
itemUsers.setOutputMarkupId(true);
notifyList.setOutputMarkupId(true);
notifyList.add(itemUsers);
// Remove selected teamUsers button ===================================
Button removeButton = new Button("removeUsersFromList") {
@Override
public void onSubmit(){
}
};
removeButton.add(new AjaxFormComponentUpdatingBehavior("onClick") {
protected void onUpdate(AjaxRequestTarget target) {
List choices = itemUsers.getChoices();
String value = itemUsers.getValue();
for (int index = 0; index < choices.size(); index++) {
final ItemUser choice = (ItemUser) choices.get(index);
if(isSelected(choice, index, value)) {
userSelection.remove(choice);
}
}
itemUsers.setChoices(userSelection);
target.addComponent(itemUsers);
}
});
notifyList.add(removeButton);
提前感谢您提供任何建议......
答案 0 :(得分：1)
好的，我不知道是否有人关心，因为我没有得到任何反馈，我想这不是一个常见的问题，但我会把我的解决方案放在这里，以防它可以帮助某人。
我可以通过删除AjaxFormComponentUpdatingBehavior()并使用按钮的onSubmit()方法来解决问题。我还在按钮上setDefaultFormProcessing(false)，以便只更新CheckboxMultipleChoice面板。现在看来如下：
// Team selection for notification =================================
final DropDownChoice teamNotificationChoice = new DropDownChoice("teamNotification", teamList, new IChoiceRenderer() {
public Object getDisplayValue(Object o) {
return ((Team) o).getName();
}
public String getIdValue(Object o, int i) {
return Long.toString(((Team) o).getId());
}
});
notifySelectionList.add(teamNotificationChoice);
// teamUser selection list for notification ========================
List<ItemUser> choices = UserUtils.convertToItemUserListFromUsers(getJtrac().findUsersForSpace(space.getId()));
teamUsers = new JtracCheckBoxMultipleChoice("teamUsers", choices, new IChoiceRenderer() {
public Object getDisplayValue(Object o) {
return ((ItemUser) o).getUser().getName();
}
public String getIdValue(Object o, int i) {
return ((ItemUser) o).getUser().getLoginName();
}
});
notifySelectionList.add(teamUsers);
// Add selected teamUsers button ===================================
Button button = new Button("addUsersToList") {
@Override
public void onSubmit(){
List choices = teamUsers.getChoices();
String value = teamUsers.getValue();
for (int index = 0; index < choices.size(); index++) {
final ItemUser choice = (ItemUser) choices.get(index);
if(isSelected(choice, index, value)&!userSelection.contains(choice)) {
userSelection.add(choice);
}
}
SortUtils.sortItemUsers(userSelection);
itemUsers.setChoices(userSelection);
notifyList.add(itemUsers);
teamUsers.updateModel();
}
};
button.setDefaultFormProcessing(false);
notifySelectionList.add(button);
notifySelectionList.setOutputMarkupId(true);
// notify list ===================================================
itemUsers = new JtracCheckBoxMultipleChoice("itemUsers", userSelection, new IChoiceRenderer() {
public Object getDisplayValue(Object o) {
return ((ItemUser) o).getUser().getName();
}
public String getIdValue(Object o, int i) {
return ((ItemUser) o).getUser().getLoginName();
}
});
itemUsers.setMaxRows(10);
itemUsers.setOutputMarkupId(true);
notifyList.setOutputMarkupId(true);
notifyList.add(itemUsers);
// Remove selected teamUsers button ===================================
Button removeButton = new Button("removeUsersFromList") {
@Override
public void onSubmit(){
List choices = itemUsers.getChoices();
String value = itemUsers.getValue();
if(value!=""){
String[] valueList = itemUsers.getValue().split(";");
List<User> userList = new ArrayList<User>();
for (String s:valueList){
userList.add(getJtrac().loadUser(s));
}
List<ItemUser> itemUserList = UserUtils.convertToItemUserListFromUsers(userList);
for (ItemUser iu:itemUserList) {
userSelection.remove(iu);
}
itemUsers.setChoices(userSelection);
notifyList.add(itemUsers);
}
}
};
removeButton.setDefaultFormProcessing(false);
notifyList.add(removeButton);