代码工作在jdk7不在jdk8 [英] Code is working in jdk7 not in jdk8

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问题描述

我从中获取示例代码使用FXML在JavaFX 2.0中创建自定义组件？。代码工作正常在jdk7，但复选框和组合框值不工作在jdk8。我无法点击复选框，并选择下拉列表。

I took the sample code from How to create custom components in JavaFX 2.0 using FXML?. the code working fine in jdk7 but the checkbox and combo box values are not working in jdk8. I am not able to click the check box even and select the dropdown.

请指导我。
请在下面找到示例代码

Please guide me for the same. Please find the sample code below

包结构

com.example.javafx.choice
  ChoiceCell.java
  ChoiceController.java
  ChoiceModel.java
  ChoiceView.fxml
com.example.javafx.mvc
  FxmlMvcPatternDemo.java
  MainController.java
  MainView.fxml
  MainView.properties


$ b b

ChoiceCell.java

ChoiceCell.java

package com.example.javafx.choice;

import java.io.IOException;
import java.net.URL;
import javafx.fxml.FXMLLoader;
import javafx.fxml.JavaFXBuilderFactory;
import javafx.scene.Node;
import javafx.scene.control.ListCell;

public class ChoiceCell extends ListCell<ChoiceModel>
{
    @Override
    protected void updateItem(ChoiceModel model, boolean bln)
    {
        super.updateItem(model, bln);

        if(model != null)
        {
            URL location = ChoiceController.class.getResource("ChoiceView.fxml");

            FXMLLoader fxmlLoader = new FXMLLoader();
            fxmlLoader.setLocation(location);
            fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());

            try
            {
                Node root = (Node)fxmlLoader.load(location.openStream());
                ChoiceController controller = (ChoiceController)fxmlLoader.getController();
                controller.setModel(model);
                setGraphic(root);
            }
            catch(IOException ioe)
            {
                throw new IllegalStateException(ioe);
            }
        }
    }
}



< .java

ChoiceController.java

package com.example.javafx.choice;

import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.CheckBox;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;

public class ChoiceController
{
    private final ChangeListener<String> LABEL_CHANGE_LISTENER = new ChangeListener<String>()
    {
        public void changed(ObservableValue<? extends String> property, String oldValue, String newValue)
        {
            updateLabelView(newValue);
        }
    };

    private final ChangeListener<Boolean> IS_SELECTED_CHANGE_LISTENER = new ChangeListener<Boolean>()
    {
        public void changed(ObservableValue<? extends Boolean> property, Boolean oldValue, Boolean newValue)
        {
            updateIsSelectedView(newValue);
        }
    };

    private final ChangeListener<Boolean> IS_VISIBILITY1_CHANGE_LISTENER = new ChangeListener<Boolean>() {
        public void changed(ObservableValue<? extends Boolean> property, Boolean oldValue, Boolean newValue) {
            updateIsVisibleView1(newValue);
        }};

    @FXML
    private Label labelView;

    @FXML
    private CheckBox isSelectedView;

   @FXML
    ComboBox isVisible1;


    private ChoiceModel model;

    public ChoiceModel getModel()
    {
        return model;
    }

    public void setModel(ChoiceModel model)
    {
        if(this.model != null)
            removeModelListeners();
        this.model = model;
        setupModelListeners();
        updateView();

    }

    private void removeModelListeners()
    {
        model.labelProperty().removeListener(LABEL_CHANGE_LISTENER);
        model.isSelectedProperty().removeListener(IS_SELECTED_CHANGE_LISTENER);
         model.isVisibleProperty1().removeListener(IS_VISIBILITY1_CHANGE_LISTENER);
        isSelectedView.selectedProperty().unbindBidirectional(model.isSelectedProperty());
    }

    private void setupModelListeners()
    {
        model.labelProperty().addListener(LABEL_CHANGE_LISTENER);
        model.isSelectedProperty().addListener(IS_SELECTED_CHANGE_LISTENER);
        model.isVisibleProperty1().addListener(IS_VISIBILITY1_CHANGE_LISTENER);
        isSelectedView.selectedProperty().bindBidirectional(model.isSelectedProperty());
    }

    private void updateView()
    {
        updateLabelView();
        updateIsSelectedView();
        updateIsVisibleView1();
    }

    private void updateLabelView(){ updateLabelView(model.getLabel()); }
    private void updateLabelView(String newValue)
    {
        labelView.setText(newValue);
    }

    private void updateIsSelectedView(){ updateIsSelectedView(model.isSelected()); }
    private void updateIsSelectedView(boolean newValue)
    {
        isSelectedView.setSelected(newValue);
    }

    private void updateIsVisibleView1() {
        updateIsVisibleView1(model.isVisible1());
    }
    private void updateIsVisibleView1(boolean newValue) {
        isVisible1.setVisible(newValue);
    }
}

ChoiceModel.java

ChoiceModel.java

package com.example.javafx.choice;

import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;

public class ChoiceModel
{
    private final StringProperty label;
    private final BooleanProperty isSelected;
    private final BooleanProperty isVisible1;

    public ChoiceModel(String label, boolean isSelected, boolean isVisible1)
    {
        this.label = new SimpleStringProperty(label);
        this.isSelected = new SimpleBooleanProperty(isSelected);
        this.isVisible1 = new SimpleBooleanProperty(isVisible1);
    }

    public String getLabel(){ return label.get(); }
    public void setLabel(String label){ this.label.set(label); }
    public StringProperty labelProperty(){ return label; }

    public boolean isSelected(){ return isSelected.get(); }
    public void setSelected(boolean isSelected){ this.isSelected.set(isSelected); }
    public BooleanProperty isSelectedProperty(){ return isSelected; }

    public boolean isVisible1()
    {
        return isVisible1.get();
    }

    public void setVisible1(boolean isVisible1)
    {
        this.isVisible1.set(isVisible1);
    }

    public BooleanProperty isVisibleProperty1()
    {
        return isVisible1;
    }
}

ChoiceView.fxml

ChoiceView.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import javafx.collections.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<HBox xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="com.example.javafx.choice.ChoiceController">
  <children>
    <CheckBox fx:id="isSelectedView" />
    <Label fx:id="labelView" />
    <ComboBox id="isVisible1" fx:id="isVisible1" value="last 7 digits" visible="false">
      <items>

         <FXCollections fx:factory="observableArrayList">
            <String fx:value="last 10 digits" />
            <String fx:value="last 9 digits" />
            <String fx:value="last 8 digits" />
            <String fx:value="last 7 digits" />
            <String fx:value="last 6 digits" />
            <String fx:value="last 5 digits" />
            <String fx:value="last 4 digits" />
            <String fx:value="last 3 digits" />

        </FXCollections>
      </items>
    </ComboBox>
  </children>
</HBox>

FxmlMvcPatternDemo.java

FxmlMvcPatternDemo.java

package com.example.javafx.mvc;

import com.example.javafx.choice.ChoiceController;
import java.util.ResourceBundle;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class FxmlMvcPatternDemo extends Application
{
    public static void main(String[] args) throws ClassNotFoundException
    {
        Application.launch(FxmlMvcPatternDemo.class, args);
    }

    @Override
    public void start(Stage stage) throws Exception
    {
        Parent root = FXMLLoader.load
        (
            FxmlMvcPatternDemo.class.getResource("MainView.fxml"),
            ResourceBundle.getBundle(FxmlMvcPatternDemo.class.getPackage().getName()+".MainView")/*properties file*/

        );
        ChoiceController controller = new ChoiceController();
        stage.setScene(new Scene(root));
        stage.show();
    }
}

MainController.java

MainController.java

package com.example.javafx.mvc;

import com.example.javafx.choice.ChoiceCell;
import com.example.javafx.choice.ChoiceModel;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.collections.FXCollections;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.util.Callback;

public class MainController implements Initializable
{
    @FXML
    private ListView<ChoiceModel> choicesView;

    @Override
    public void initialize(URL url, ResourceBundle rb)
    {
        choicesView.setCellFactory(new Callback<ListView<ChoiceModel>, ListCell<ChoiceModel>>()
        {
            public ListCell<ChoiceModel> call(ListView<ChoiceModel> p)
            {
                return new ChoiceCell();
            }
        });
        choicesView.setItems(FXCollections.observableArrayList
        (
            new ChoiceModel("Tiger", true, false),
            new ChoiceModel("Shark", false, true),
            new ChoiceModel("Bear", false, true),
            new ChoiceModel("Wolf", true, true)
        ));
    }

    @FXML
    private void handleForceChange(ActionEvent event)
    {
        if(choicesView != null && choicesView.getItems().size() > 0)
        {
            boolean isSelected = choicesView.getItems().get(0).isSelected();
            choicesView.getItems().get(0).setSelected(!isSelected);
        }
    }
}

MainView.fxml

MainView.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<VBox
    xmlns:fx="http://javafx.com/fxml"
    fx:controller="com.example.javafx.mvc.MainController"

    prefWidth="300"
    prefHeight="400"
    fillWidth="false"
>
    <children>
        <Label text="%title" />
        <ListView fx:id="choicesView" />
        <Button text="Force Change" onAction="#handleForceChange" />
    </children>
</VBox>

MainView.proprties

MainView.proprties

 title=JavaFX 2.0 FXML MVC demo


推荐答案

p>我没有挖得更深，但重构像下面应该足够了。双重检查附加和删除的侦听器是否正确执行。

I didn't dig deeper but refactoring like as following should suffice. Double check for correct executions of attached and removed listeners.

public class ChoiceCell extends ListCell<ChoiceModel> {

    private Node root;
    private ChoiceController controller;

    public ChoiceCell() {

        URL location = ChoiceController.class.getResource("ChoiceView.fxml");
        FXMLLoader fxmlLoader = new FXMLLoader();
        fxmlLoader.setLocation(location);
        fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());

        try {
            root = (Node) fxmlLoader.load(location.openStream());
            controller = (ChoiceController) fxmlLoader.getController();
        } catch (IOException ioe) {
            throw new IllegalStateException(ioe);
        }
    }

    @Override
    protected void updateItem(ChoiceModel model, boolean bln) {
        super.updateItem(model, bln);

        if (model != null) {
            controller.setModel(model);
            setGraphic(root);
        } else {
            setGraphic(null);
        }
    }
}

这篇关于代码工作在jdk7不在jdk8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！

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