JavaFX - 从禁用转换为启用按钮

问题描述 投票：0回答：1

父类的控制器

该类包含 3 个按钮“btnSocieta”、“btnUnitaLocali”、“btnReparti”。 第一个是默认启用的，其他两个是禁用的。 在 stackPane 中，我显示了您可以立即找到的起始页面。

他们必须在调用方法 setEnableBtnUnitaLocale 或其他方法后更改状态

package View.Controllers;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;

import com.jfoenix.controls.JFXButton;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class Creazione implements Initializable {

    @FXML
    private JFXButton btnSocieta;

    @FXML
    private JFXButton btnUnitaLocali;

    @FXML
    private JFXButton btnReparti;

    @FXML
    private StackPane stackPane;

    @Override
    public void initialize(URL url, ResourceBundle rb) {

        btnUnitaLocali.setDisable(true);
        btnReparti.setDisable(true);

        try {
            Parent root = FXMLLoader.load(getClass().getResource("/View/fxml/creazione_societa.fxml"));
            stackPane.getChildren().removeAll();
            stackPane.getChildren().setAll(root);

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public void switchToSocieta(javafx.event.ActionEvent event) throws IOException {
        Parent root = FXMLLoader.load(getClass().getResource("/View/fxml/creazione_societa.fxml"));
        stackPane.getChildren().removeAll();
        stackPane.getChildren().setAll(root);
    }

    public void switchToUnitaLocali(javafx.event.ActionEvent event) throws IOException {
        Parent root = FXMLLoader.load(getClass().getResource("/View/fxml/creazione_unitalocale.fxml"));
        stackPane.getChildren().removeAll();
        stackPane.getChildren().setAll(root);
    }

    public void switchToReparti(javafx.event.ActionEvent event) {
        System.out.println("You clicked me!");
    }

    public void setEnableBtnUnitaLocale() {
        
        btnUnitaLocali.setDisable(false);
        System.out.println("setEnableBtnUnitaLocale()");

    }

    public void setEnableBtnReparti() {

        btnReparti.setDisable(false);
    }

}

由 Creazione 管理的 FXML 文件，其 StackPane 包含 CreazioneSocieta


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

<?import com.jfoenix.controls.JFXButton?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.layout.StackPane?>

<BorderPane xmlns="http://javafx.com/javafx/20.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="View.Controllers.Creazione">
   <top>
      <Pane prefHeight="48.0" prefWidth="600.0" BorderPane.alignment="CENTER">
         <children>
            <Label alignment="CENTER" layoutX="181.0" layoutY="16.0" minWidth="34.0" prefHeight="17.0" text="&gt;&gt;" />
            <Label alignment="CENTER" layoutX="382.0" layoutY="16.0" text="&gt;&gt;" />
            <JFXButton fx:id="btnSocieta" alignment="CENTER" layoutX="53.0" layoutY="12.0" onAction="#switchToSocieta" text="Società / Ente" />
            <JFXButton fx:id="btnUnitaLocali" alignment="CENTER" layoutX="255.0" layoutY="12.0" onAction="#switchToUnitaLocali" text="Unità locali" />
            <JFXButton fx:id="btnReparti" alignment="CENTER" layoutX="453.0" layoutY="12.0" onAction="#switchToReparti" text="Reparti" />
         </children>
      </Pane>
   </top>
   <center>
      <StackPane fx:id="stackPane" prefHeight="352.0" prefWidth="600.0" BorderPane.alignment="CENTER" />
   </center>
</BorderPane>

FXML 文件的控制器

此控制器的唯一作用域是调用我们之前通过方法“salvaSocieta”看到的方法“setEnableBtnUnitaLocale”

package View.Controllers;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;

import com.jfoenix.controls.JFXButton;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;


public class CreazioneSocieta implements Initializable {

    @FXML
    JFXButton btnSalva;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        

    }

    public void salvaSocieta(javafx.event.ActionEvent event) throws IOException{
        
        FXMLLoader loader = new FXMLLoader(getClass().getResource("/View/fxml/main_creazione.fxml"));
        Parent root = (Parent) loader.load();
        
        Creazione controller = loader.getController();
        controller.setEnableBtnUnitaLocale();

    }
    
}

包含保存按钮的 FXML 文件

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

<?import com.jfoenix.controls.JFXButton?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.Pane?>

<Pane xmlns="http://javafx.com/javafx/20.0.1" xmlns:fx="http://javafx.com/fxml/1"
   fx:controller="View.Controllers.CreazioneSocieta">
   <children>
      <Label layoutX="51.0" layoutY="139.0" prefHeight="17.0" prefWidth="93.0"
         text="Ragione Sociale:" />
      <TextField layoutX="153.0" layoutY="135.0" prefHeight="25.0" prefWidth="437.0" />
      <Label layoutX="51.0" layoutY="203.0" prefHeight="17.0" prefWidth="56.0" text="Indirizzo:" />
      <TextField layoutX="115.0" layoutY="199.0" prefHeight="25.0" prefWidth="330.0" />
      <Label layoutX="51.0" layoutY="324.0" prefHeight="17.0" prefWidth="56.0" text="Telefono:" />
      <TextField accessibleText="INTEGER" layoutX="115.0" layoutY="320.0" prefHeight="25.0"
         prefWidth="330.0" />
      <Label layoutX="51.0" layoutY="262.0" prefHeight="17.0" prefWidth="43.0" text="e-mail:" />
      <TextField layoutX="115.0" layoutY="258.0" prefHeight="25.0" prefWidth="330.0" />
      <Label layoutX="467.0" layoutY="203.0" prefHeight="17.0" prefWidth="56.0" text="Provincia:" />
      <TextField accessibleText="INTEGER" layoutX="533.0" layoutY="199.0" prefHeight="25.0"
         prefWidth="56.0" />
      <JFXButton onAction="#salvaSocieta" contentDisplay="CENTER" defaultButton="true"
         graphicTextGap="0.0" layoutX="573.0" layoutY="421.0" prefHeight="45.0" prefWidth="0.0"
         ripplerFill="#bfbdbd" textFill="WHITE" textOverrun="CLIP">
         <graphic>
            <ImageView fitHeight="37.0" fitWidth="37.0" pickOnBounds="true" preserveRatio="true">
               <image>
                  <Image url="@../icons/save_icon.png" />
               </image>
            </ImageView>
         </graphic>
      </JFXButton>
   </children>
</Pane>

问题：调用函数“setEnableBtnUnitaLocale”后，“btnUnitaLocale”未启用

java button javafx fxml
1个回答
0
投票

使用MVC 方法。定义一个 

Model
类，其中包含应用程序的状态，并具有观察值并对它们的更改做出响应的机制。您可以使用 JavaFX Properties 轻松完成此操作：

public class Model {

    private final BooleanProperty societySaved = new SimpleBooleanProperty();

    public BooleanProperty societySavedProperty() {
        return societySaved ;
    }

    public final boolean isSocietySaved() {
        return societySavedProperty().get();
    }

    public final void setSocietySaved(boolean societySaved) {
        societySavedProperty().set(societySaved);
    }


    // similarly for other properties as needed
}

在您的 

Creazione
控制器类中，为模型定义一个字段，并将按钮的状态绑定到模型中的状态：

public class Creazione {

    @FXML
    private JFXButton btnSocieta;

    @FXML
    private JFXButton btnUnitaLocali;

    @FXML
    private JFXButton btnReparti;

    @FXML
    private StackPane stackPane;

    private Model model ;

    public void setModel(Model model) {
        this.model = model ;
        btnUnitaLocali.disableProperty().bind(model.societySavedProperty().not());
        // similarly for other buttons and properties in the model
    }

    @Override
    public void initialize(URL url, ResourceBundle rb) {

        //btnUnitaLocali.setDisable(true);
        //btnReparti.setDisable(true);

        try {
            Parent root = FXMLLoader.load(getClass().getResource("/View/fxml/creazione_societa.fxml"));
            stackPane.getChildren().removeAll();
            stackPane.getChildren().setAll(root);

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    // ... (further modifications to methods shown later)



    // these are not needed
    // public void setEnableBtnUnitaLocale() {
        
    //     btnUnitaLocali.setDisable(false);
    //     System.out.println("setEnableBtnUnitaLocale()");

    // }

    // public void setEnableBtnReparti() {

    //     btnReparti.setDisable(false);
    // }

}

类似地，在其他控制器中，定义对模型的引用并更新属性。例如：

public class CreazioneSocieta  {

    private Model model ;

    public void setModel(Model model) {
        this.model = model;
    }


    public void salvaSocieta(ActionEvent event) {
        
        model.setSocietySaved(true);

    }
    
}

现在，在您的应用程序代码中，您需要创建一个 

Model
实例，并且当您加载初始 view，将模型传递给控制器：

Model model = new Model();
FXMLLoader loader = new FXMLLoader(getClass().getResource("/View/fxml/main_creazione.fxml"));
Parent root = (Parent) loader.load();
        
Creazione controller = loader.getController();
controller.setModel(model);

Scene scene = new Scene(root);
stage.setScene(scene);
// etc.

最后，回到您的 

Creazione
类中，确保将相同的模型实例传递给其他控制器。例如：

public class Creazione {

    // existing code ...

    public void switchToSocieta(javafx.event.ActionEvent event) throws IOException {
        FXMLLoader loader = new FXMLLoader(getClass().getResource("/View/fxml/creazione_societa.fxml"));
        Parent root = loader.load();
        CreazioneSocieta controller = loader.getController();
        controller.setModel(model);

        stackPane.getChildren().removeAll();
        stackPane.getChildren().setAll(root);
    }
}
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