cal*_*ben 5 java javafx javafx-2
我想在FXML显示之前更改弹出窗口中的标签和文本.这样做是因为所有帮助项都非常相似,我想制作一个模板FXML,然后相应地更改标签和文本区域的值以减少编码.
我很惊讶我没有遇到过模板方法JavaFX.如果有更好的方法可以解决这个问题,请提出建议.
对于手头的任务,我有以下几点:
@FXML
private void documentationAction(ActionEvent action) throws IOException {
Stage dialogue = new Stage();
Parent root = null;
FXMLLoader loader = new FXMLLoader();
root = loader.load(getClass().getResource("dialogues/dialogue.fxml"));
Scene scene = new Scene(root);
/*
* change text values in title (Label) and text (TextArea)
* and change the behavior of the findMore button
*/
dialogue.setTitle("Documentation");
dialogue.setScene(scene);
dialogue.show();
}
我希望能够改变内部变量FXMl文件,为此,我做了getters,并setters在控制器类,但我想不出如何做到这一点.
有办法吗？看起来在多窗口应用程序中更改窗口之间的信息是必要的,所以我确信有一些我很想念的简单.
UPDATE控制器代码:
public class DialogueController implements Initializable {
@FXML
private Button more;
@FXML
private Button close;
@FXML
private TextArea text;
@FXML
private Label title;
public TextArea getText() {
return text;
}
public void setText(String text) {
this.text.setText(text);
}
public Label getTitle() {
return title;
}
public void setTitle(String text) {
this.title.setText(text);
}
@FXML
public void closeAction(ActionEvent action) {
// get a handle to the stage
Stage stage = (Stage) close.getScene().getWindow();
// do what you have to do
stage.close();
}
@FXML
public void moreAction(ActionEvent action) {
}
@FXML
public void makeDocumentation(ActionEvent action) {
this.title.setText("Documentation");
}
/**
* Initializes the controller class.
*/
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
全对话FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.net.*?>
<?import java.util.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" padding="$x1" prefHeight="500.0" prefWidth="400.0" styleClass="mainFxmlClass" xmlns:fx="http://javafx.com/fxml" fx:controller="pdbpro.dialogues.DialogueController">
<children>
<GridPane alignment="CENTER" prefHeight="400.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<Label fx:id="title" alignment="CENTER_LEFT" prefWidth="-1.0" styleClass="title" text="Title" underline="false" visible="true" GridPane.columnIndex="0" GridPane.rowIndex="0">
<GridPane.margin>
<Insets fx:id="x1" />
</GridPane.margin>
</Label>
<TextArea fx:id="text" editable="false" focusTraversable="false" prefWidth="200.0" wrapText="true" GridPane.columnIndex="0" GridPane.rowIndex="1">
<GridPane.margin>
<Insets bottom="24.0" left="15.0" right="15.0" />
</GridPane.margin>
</TextArea>
<ToolBar GridPane.columnIndex="0" GridPane.rowIndex="2">
<items>
<Button fx:id="more" mnemonicParsing="false" text="Find more" />
<Button fx:id="close" mnemonicParsing="false" onAction="#closeAction" text="Close" />
</items>
<GridPane.margin>
<Insets bottom="14.0" />
</GridPane.margin>
</ToolBar>
</children>
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<padding>
<Insets fx:id="x1" />
</padding>
<rowConstraints>
<RowConstraints maxHeight="60.0" minHeight="60.0" prefHeight="60.0" valignment="CENTER" vgrow="NEVER" />
<RowConstraints maxHeight="1.7976931348623157E308" minHeight="50.0" prefHeight="0.0" vgrow="ALWAYS" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
</GridPane>
</children>
<stylesheets>
<URL value="@dialogue.css" />
</stylesheets>
</AnchorPane>
这些行的完整堆栈错误跟踪
FXMLLoader loader = new FXMLLoader();
Parent root = loader.load(getClass().getResource("dialogues/dialogue.fxml"));
DialogueController dc = loader.getController();
dc.makeDocumentation(); //ERROR
Scene scene = new Scene(root);
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1440)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:28)
at javafx.event.Event.fireEvent(Event.java:171)
at javafx.scene.control.MenuItem.fire(MenuItem.java:456)
at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer.doSelect(ContextMenuContent.java:1188)
at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer$6.handle(ContextMenuContent.java:1139)
at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer$6.handle(ContextMenuContent.java:1137)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
at javafx.event.Event.fireEvent(Event.java:171)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3324)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3164)
at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3119)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1559)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2261)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:228)
at com.sun.glass.ui.View.handleMouseEvent(View.java:528)
at com.sun.glass.ui.View.notifyMouse(View.java:922)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1435)
... 37 more
Caused by: java.lang.NullPointerException
at pdbpro.MainController.documentationAction(MainController.java:82)
... 42 more
我可以看到的一种方法是让您的控制器实现可初始化并实现 initialize 方法。当 fxml 加载器创建控制器时，将自动调用 initialize 方法。当调用 initialize 方法时，所有声明的 fxml 对象都应该被初始化并准备好进行定制。
[edit] After reading the docs for initializable, it says that if a method called initialize with no args is created that it will be called automatically with the fxml loader. So from what I understand, you don't need to implement initializable. Just create an initialize method with no args.
If needed, further info may be found in an introduction to fxml.
尝试这个：
root = (Parent) loader.load(getClass().getResource("dialogues/dialogue.fxml").openStream());
DialogueController dc = loader.getController();
dc.setTitle("title");
dc.setTextArea("text");
// and so on..
...
dialogue.show();
断言 DialogueController dc 不为空。假设“标题”是 fxml 文件中的一个 Label fx:id=titleLabel，它应该在您的控制器类中支持，如下所示：
...
@FXML private Label titleLabel;
...
public void setTitle(String txt) {
titleLabel.setText(txt);
}
...