我正在用 Java FX 编写一个带有一些精美动画的应用程序。我想将文本节点text_1从左侧滑入可用舞台宽度的 20%。
public class SplashController implements Initializable {
public Democracy parent = null;
@FXML
public Text text1;
public Text text2;
public Text text3;
public void animateIntro() {
TranslateTransition t1_transl_1 = new TranslateTransition(new Duration(1500d),text1);
t1_transl_1.setFromX(-100d);
t1_transl_1.setByX((double)((20/100) * parent.getStage().getWidth()+100));
// Here Democracy class has a static method to return its instance, which is assigned on class creation. I want to slide in the text_1 node to 20% of the total window width.
//Here I am always getting **NaN**
System.out.println((20d/100d) * parent.getStage().getWidth()); // Getting NaN
System.out.println(parent.getStage().getScene().getWidth()); // Throwing Exception
FadeTransition t1_fade_in = new FadeTransition(new Duration(1000d), text1);
t1_fade_in.setFromValue(0);
t1_fade_in.setToValue(100d);
ParallelTransition t1_ptrans_1 = new ParallelTransition(text1,t1_fade_in,t1_transl_1);
//With parallel transition I want to fade in and slide in the node at the same time.
t1_ptrans_1.play();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
parent = Democracy.getInstance();
animateIntro();
}
}
当我使用 Netbeans 的内置调试器时，我发现 parent 的 stage 变量中的大部分值都是 null。我认为这是因为那个阶段没有完全初始化，我得到了空值。是否有任何解决方法来检测完整的初始化？请帮我...
编辑：即使我添加了一个
while(!parent.getStage().isShowing()) {
try{
sleep(100);
} catch(Exception e){}
循环以确保仅在舞台可见后才调用 animateIntro() ，但我仍然无法获得宽度。请帮我解决这个问题..