Question

I have a objectchoice field with choices as say YES and NO. I want to handle event when the user selects any one of the choices.

for example when the user selects YES i want a labelField to be added to the screen. and when No is selected this label should be removed from the screen

请帮助

Answer 1

我认为,你可以这样做,办法是实施外地食堂界面,凌驾于外地活动之上。

Answer 2

在您的窗口类别中,执行外地生计。

objectChoiceField.setChangeListener(this)

我建议对你希望添加/删除标签的指数进行标识,以便你能够更容易地做你想要做的事情,而不必冒用无效指数的风险:

if (selectedIndex == 0) { // Yes
    if (!labelField.hasManager()) { 
        // If the field is not already present, add it to the screen. 
        insert(labelField, positionToInsertField); 
    } 
} else {  // No
    if (labelField.hasManager()) { 
        // Our field is currently on the screen - let s remove it now. 
        remove(labelField); 
    } 
}

在以下法典中,你可以找到一个非常相似的行为的例子:

http://svn.bbssh.org/trunk/BBSSH/src/org/bbssh/ Screens/ConnectionPropertiesScreen.java

实地援引的“手提式”功能 ChangeListener。在那里,你看看我们如何根据目前的甄选(在这种情况下,真正的真的字体和比图字体)来积极补充和消除控制。

友情链接