JavaFX:如何设置默认选择/打开的 TiteledPane [英] JavaFX: How to set a TiteledPane selected/opened by default
问题描述
我正在开发一个使用 java 和 javaFX 的项目，我需要知道是否有办法在 Accordion 中使用第一个 TiteledPane代码>默认打开..
I am working on a project using java and javaFX, i need to know if there is a way to have the first TiteledPane in the Accordion opened by default..
我的意思是当舞台加载时，第一个TiteledPane被选中，其内容显示无需任何用户干预.我尝试了所有建议的方法，但没有一个看起来像我想要的.正如我所见，官方文档中或本网站或其他网站中都没有描述.
I mean when the stage is loaded, the first TiteledPane is selected and its content showed without any user's intervention. i tried all suggested methods but no one look like what i want. As i see also no described one in the official documentation or given in this site or other is like.
另外:
这是我的方法:(代码 java 和 FXML)
here is my approach:(Code java and FXML)
@FXML
private Accordion accord_pane;
@FXML
private TitledPane pane_ara,pane_sci,pane_soc,pane_art,pane_spo,pane_fra,pane_ang;
...
pane_ara.setText("TitledPane A");
pane_sci.setText("TitledPane B");
accord_pane.setExpandedPane(pane_ara);
<Accordion fx:id="accord_pane" layoutX="20.0" layoutY="100.0" prefHeight="400.0" prefWidth="680.0">
<panes>
<TitledPane fx:id="pane_ara" animated="false">
<content>
<Pane prefHeight="200.0" prefWidth="200.0">
<children>
<ImageView fx:id="img_unit_ara" fitHeight="250.0" fitWidth="650.0" layoutX="15.0" layoutY="15.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@temp_5.png" />
</image>
</ImageView>
</children>
</Pane>
</content>
</TitledPane>
<TitledPane fx:id="pane_sci" animated="false">
<content>
<Pane prefHeight="200.0" prefWidth="200.0">
<children>
<ImageView fx:id="img_unit_sci" fitHeight="190.0" fitWidth="650.0" layoutX="15.0" layoutY="15.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@temp_3.png" />
</image>
</ImageView>
</children>
</Pane>
</content>
</TitledPane>
</panes>
</Accordion>
这里有一个例外:
javafx.fxml.LoadException:
/C:/Users/Malek%20Boubakri/Google%20Drive/workspace/Sirat/bin/vue/Enseignant.fxml
at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.load(Unknown Source)
at vue.Enseignant.start(Enseignant.java:18)
at vue.Index.stageCtrlHandler(Index.java:85)
at controleur.MenuCtrl.click_btn(MenuCtrl.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.reflect.misc.Trampoline.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(Unknown Source)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Scene$ClickGenerator.postProcess(Unknown Source)
at javafx.scene.Scene$ClickGenerator.access$8100(Unknown Source)
at javafx.scene.Scene$MouseHandler.process(Unknown Source)
at javafx.scene.Scene$MouseHandler.access$1500(Unknown Source)
at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$350(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$$Lambda$165/775736639.get(Unknown Source)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.notifyMouse(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$145(Unknown Source)
at com.sun.glass.ui.win.WinApplication$$Lambda$36/2117255219.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at controleur.EnsCtrl.initialize(EnsCtrl.java:301)
... 54 more
这是我依赖的文档中的文本.
here is the text from documentation that i lean on.
public final void setExpandedPane(TitledPane value)
当前可见的展开后的 TitledPane.虽然是从技术上讲，可以将展开的窗格设置为非在 getPanes() 中，这样做将被皮肤视为已扩展的窗格一片空白.如果一个窗格被设置为展开的窗格，并且随后从 getPanes() 中移除，则展开的窗格将被设置为 null，如果可能的.(如果您手动绑定了例如，将窗格扩展为某个值).
The expanded TitledPane that is currently visible. While it is technically possible to set the expanded pane to a value that is not in getPanes(), doing so will be treated by the skin as if expandedPane is null. If a pane is set as the expanded pane, and is subsequently removed from getPanes(), then expanded pane will be set to null, if possible. (This will not be possible if you have manually bound the expanded pane to some value, for example).
如果有什么不清楚的，请评论.任何建议都会有所帮助..谢谢
If any thing is not clear please just comment. Any suggestion will be helpful..Thanks
推荐答案
关于代码困难，强烈建议在每次工作时刷新你的项目，然后从 javaFX 场景生成器保存一个 FXML 文件，因为 eclipse不要自动这样做.
About the code difficulties it's highly recommended to refresh your project everytime you work on then save an FXML file from javaFX scene builder because eclipse dont do that automatically.
如果你还有一些代码问题，这个例子验证:
if you still hve some code problemes,this exemple is verified:
@FXML
private Accordion accord;
@FXML
private TitledPane pane1,pane2;
//codes in controller.intialize()
...
pane1.setText("TitledPane A");
pane2.setText("TitledPane B");
accord.setExpandedPane(pane1);
关于你在评论中提到的云问题，我知道将工作区放在谷歌驱动器文件夹中没有坏处.如果你每次都做备份可能会更好完成一章代码，因为当他尝试加载另一个程序已经使用的文件时，有时会导致驱动器崩溃.
And about the cloud problem you mentioned in the comment, as i know there is no harm on putting the workspace in google drive folder.May be it would be better if you do backup every time you finish a chapter of code, because sometimes drive crash when he try to load a file already used by another program.
这篇关于JavaFX:如何设置默认选择/打开的 TiteledPane的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
