javafx - 当 Jasper Report 在弹出窗口中可见时如何在 JavaFx 中锁定父窗口

Question

为了在 JavaFX 11 中创建 Jasper 报告，我正在使用动态报告。当我单击按钮 Jasper Report 打开并在弹出窗口中可见时。但是我可以根据需要多次单击该按钮，并且报告将打开这些次数。但是一旦jasper报告可见，我想锁定父窗口，以便只有在关闭弹出窗口后才能访问父窗口。正如这个问题中所解释的，我们可以在父窗口和子窗口中实现同样的事情，但我想用 Parent 来实现类似的事情，因为我的舞台和孩子是 Jasper Window。下面提到了相同的代码： -

JavaFxJasperReportsDemo.java

package demo;

import java.util.ArrayList;
import java.util.List;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
import net.sf.dynamicreports.jasper.builder.JasperReportBuilder;
import net.sf.dynamicreports.report.builder.DynamicReports;
import net.sf.dynamicreports.report.builder.column.Columns;
import net.sf.dynamicreports.report.builder.component.Components;
import net.sf.dynamicreports.report.builder.datatype.DataTypes;
import net.sf.dynamicreports.report.constant.HorizontalTextAlignment;
import net.sf.dynamicreports.report.exception.DRException;

public class JavaFxJasperReportsDemo extends Application{

    @FXML
    private StackPane stackPane;

    public void start(Stage stage) throws Exception{

        try{
            Parent root = FXMLLoader.load(getClass().getResource("/FXMLJavaFXJasperReportsDemo.fxml"));
            Scene scene = new Scene(root);
            stage.setScene(scene);
            stage.setTitle("Java FX Demo");
            stage.show();
            stage.setOnCloseRequest(new EventHandler<WindowEvent>() {
                public void handle(WindowEvent arg0) {
                    Platform.exit();
                }
            });
        }
        catch (Exception e){
            throw e;
        }
    }

    @FXML
    public void loadReport(ActionEvent event) {
        JasperReportBuilder report = DynamicReports.report();
        List<DemoPOJO> lstDemoPOJOs=new ArrayList<DemoPOJO>();
        DemoPOJO demoPOJO=new DemoPOJO();
        demoPOJO.setName("ABC");
        demoPOJO.setCity("Delhi");
        lstDemoPOJOs.add(demoPOJO);
        demoPOJO = new DemoPOJO();
        demoPOJO.setName("XYZ");
        demoPOJO.setCity("Agra");
        lstDemoPOJOs.add(demoPOJO);
        report
        .columns(
                Columns.columnRowNumberColumn("S No"),
                Columns.column("Name", "name", DataTypes.stringType()),
                Columns.column("Address", "city", DataTypes.stringType())
                ).title(
                        Components.text("Demo Java Fx Jasper Reports").
                        setHorizontalTextAlignment(HorizontalTextAlignment.CENTER))
        .pageFooter(Components.pageXofY())
        .setDataSource(lstDemoPOJOs);
        try {
            report.show(false);
        } catch (DRException e) {
            e.printStackTrace();
        }

    }

    public static void main(String[] args){
        try{
            launch(args);
        }
        catch (Exception e){
            e.printStackTrace();
        }
    }
}

标签： javafxjasper-reports

Answer 1

到目前为止，我还没有基于父窗口“可达性”的解决方案。但我可以为您提供一个替代解决方案，不允许用户多次单击。这个想法是在您按下按钮后立即禁用场景的根节点，并仅在报告窗口关闭时启用它。不确定这是否符合您的目的。

reportButton.setOnAction(e -> {
    // Get root node of the scene
    Node sceneRoot = ((Node)e.getTarget()).getScene().getRoot();

    // First things first, disable it !!
    sceneRoot.setDisable(true);

    // Your actual method for showing report
    loadReport(e);
    
    // Get all current AWT windows.
    java.awt.Window[] windows = java.awt.Window.getWindows();

    // Get the recently added window (your report window) and add a close listener.
    windows[windows.length-1].addWindowListener(new java.awt.event.WindowAdapter() {
        public void windowClosing(java.awt.event.WindowEvent evt) {
            // When the window is closed, enable your root node.
            sceneRoot.setDisable(false);
        }
    });
});

注意：JasperReportBuilder 的 JasperViewer 的内部实现是一个 JFrame。

[更新]

完整的工作演示如下：

import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
import net.sf.dynamicreports.jasper.builder.JasperReportBuilder;
import net.sf.dynamicreports.report.builder.DynamicReports;
import net.sf.dynamicreports.report.builder.column.Columns;
import net.sf.dynamicreports.report.builder.component.Components;
import net.sf.dynamicreports.report.builder.datatype.DataTypes;
import net.sf.dynamicreports.report.constant.HorizontalAlignment;
import net.sf.dynamicreports.report.exception.DRException;

import java.util.ArrayList;
import java.util.List;

public class JavaFxJasperReportsDemo extends Application {

    @FXML
    private StackPane stackPane;

    public void start(Stage stage) throws Exception {

        try {
            StackPane root = new StackPane();
            ContextMenu cm = new ContextMenu();
            cm.getItems().addAll(new MenuItem("Test1"), new MenuItem("Test2"));
            Button reportButton = new Button("Report");
            reportButton.setContextMenu(cm);
            reportButton.setOnAction(e -> {
                // Get root node of the scene
                Node sceneRoot = ((Node) e.getTarget()).getScene().getRoot();

                // First things first, disable it !!
                sceneRoot.setDisable(true);

                // Your actual method for showing report
                loadReport(e);

                // Get all current AWT windows.
                java.awt.Window[] windows = java.awt.Window.getWindows();

                // Get the recently added window (your report window) and add a listener.
                windows[windows.length - 1].addWindowListener(new java.awt.event.WindowAdapter() {
                    public void windowClosing(java.awt.event.WindowEvent evt) {
                        // When the window is closed, enable your root node.
                        sceneRoot.setDisable(false);
                    }
                });
            });
            root.getChildren().add(reportButton);
            Scene scene = new Scene(root, 200, 200);
            stage.setScene(scene);
            stage.setTitle("Java FX Demo");
            stage.show();
            stage.setOnCloseRequest(new EventHandler<WindowEvent>() {
                public void handle(WindowEvent arg0) {
                    Platform.exit();
                }
            });


        } catch (Exception e) {
            throw e;
        }
    }

    @FXML
    public void loadReport(ActionEvent event) {
        JasperReportBuilder report = DynamicReports.report();
        List<DemoPOJO> lstDemoPOJOs = new ArrayList<DemoPOJO>();
        DemoPOJO demoPOJO = new DemoPOJO();
        demoPOJO.setName("ABC");
        demoPOJO.setCity("City 1");
        lstDemoPOJOs.add(demoPOJO);
        demoPOJO = new DemoPOJO();
        demoPOJO.setName("XYZ");
        demoPOJO.setCity("City 2");
        lstDemoPOJOs.add(demoPOJO);
        report
                .columns(
                        Columns.columnRowNumberColumn("S No"),
                        Columns.column("Name", "name", DataTypes.stringType()),
                        Columns.column("Address", "city", DataTypes.stringType())
                ).title(
                Components.text("Demo Java Fx Jasper Reports").
                        setHorizontalAlignment(HorizontalAlignment.CENTER))
                //.pageFooter(Components.pageXofY())
                .setDataSource(lstDemoPOJOs);
        try {
            report.show(false);
        } catch (DRException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        try {
            launch(args);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}