Die Anleitung zu JavaFX Button

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1- JavaFX Button

JavaFX Button ermöglicht den Entwickler, eine Aktion zu behandeln wenn der Benutzer einen Button klickt. die classe Button ist ein aus Labeled ausgeweiterter Class. Er kann die Text, Image oder beide zeigen

2- Das Beispiel über Button

Ein Button mit Text, Image oder beide erstellen
InputStream input =               
       getClass().getResourceAsStream("/org/o7planning/javafx/icon/java-32.png");

Image image = new Image(input);
ImageView imageView = new ImageView(image);

// Create a Button with Text & Image from Constructor
Button button2 = new Button("Button with Text & Image", imageView);

// Or
Button button2 = new Button("Button with Text & Image");
button2.setGraphic(imageView);
Sehe Beispiel
ButtonDemo.java
package org.o7planning.javafx.button;

import java.io.InputStream;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class ButtonDemo extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        FlowPane root = new FlowPane();
        root.setPadding(new Insets(10));
        root.setHgap(10);
        root.setVgap(10);

        // Button 1
        Button button1 = new Button("Button with Text");

        InputStream input = //
                getClass().getResourceAsStream("/org/o7planning/javafx/icon/java-32.png");

        Image image = new Image(input);
        ImageView imageView = new ImageView(image);

        Button button2 = new Button("Button with Text & Image");
        button2.setGraphic(imageView);

        root.getChildren().addAll(button1, button2);

        primaryStage.setTitle("Java Button (o7planning.org)");

        Scene scene = new Scene(root, 350, 150);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}

3- Button und das Event

Die Hauptfunktion jedes Buttons ist Erstellung einer Funktion beim Klicken. die Methode  setOnAction von Class  Button legt fest, was passiert beim Klicken
button.setOnAction(new EventHandler<ActionEvent>() {

    @Override
    public void handle(ActionEvent event) {
        label.setText(new Date().toString());
    }
});
Außerdem ist Button eine Node, die alle Methode für die Ereignisbehandlung vom class Node geerbt wird
** Node **
public final void setOnDragEntered(
           EventHandler<? super DragEvent> value)

public final void setOnDragExited(
           EventHandler<? super DragEvent> value)

public final void setOnDragOver(
           EventHandler<? super DragEvent> value)

public final void setOnDragDropped(
           EventHandler<? super DragEvent> value)

public final void setOnDragDone(
           EventHandler<? super DragEvent> value)

public final void setOnContextMenuRequested(
           EventHandler<? super ContextMenuEvent> value)

public final void setOnMouseClicked(
           EventHandler<? super MouseEvent> value)

public final void setOnMouseDragged(
           EventHandler<? super MouseEvent> value)

public final void setOnMouseEntered(
           EventHandler<? super MouseEvent> value)

public final void setOnMouseExited(
           EventHandler<? super MouseEvent> value)

public final void setOnMouseMoved(
           EventHandler<? super MouseEvent> value)

public final void setOnMousePressed(
           EventHandler<? super MouseEvent> value)

public final void setOnMouseReleased(
           EventHandler<? super MouseEvent> value)

public final void setOnDragDetected(
           EventHandler<? super MouseEvent> value)

public final void setOnMouseDragOver(
           EventHandler<? super MouseDragEvent> value)

public final void setOnMouseDragReleased(
           EventHandler<? super MouseDragEvent> value)

public final void setOnMouseDragEntered(
           EventHandler<? super MouseDragEvent> value)

public final void setOnMouseDragExited(
           EventHandler<? super MouseDragEvent> value)

public final void setOnScrollStarted(
           EventHandler<? super ScrollEvent> value)

public final void setOnScroll(
           EventHandler<? super ScrollEvent> value)

public final void setOnScrollFinished(
           EventHandler<? super ScrollEvent> value)

public final void setOnRotationStarted(
           EventHandler<? super RotateEvent> value)

public final void setOnRotate(
           EventHandler<? super RotateEvent> value)

public final void setOnRotationFinished(
           EventHandler<? super RotateEvent> value)

public final void setOnZoomStarted(
           EventHandler<? super ZoomEvent> value)

public final void setOnZoom(
           EventHandler<? super ZoomEvent> value)

public final void setOnZoomFinished(
           EventHandler<? super ZoomEvent> value)

public final void setOnSwipeUp(
           EventHandler<? super SwipeEvent> value)

public final void setOnSwipeDown(
           EventHandler<? super SwipeEvent> value)

public final void setOnSwipeLeft(
           EventHandler<? super SwipeEvent> value)

public final void setOnSwipeRight(
           EventHandler<? super SwipeEvent> value)

public final void setOnTouchPressed(
           EventHandler<? super TouchEvent> value)

public final void setOnTouchMoved(
           EventHandler<? super TouchEvent> value)

public final void setOnTouchReleased(
           EventHandler<? super TouchEvent> value)

public final void setOnTouchStationary(
           EventHandler<? super TouchEvent> value)

public final void setOnKeyPressed(
           EventHandler<? super KeyEvent> value)

public final void setOnKeyReleased(
           EventHandler<? super KeyEvent> value)

public final void setOnKeyTyped(
           EventHandler<? super KeyEvent> value)

public final void setOnInputMethodTextChanged(
           EventHandler<? super InputMethodEvent> value)
Beispiel für die Behandlung einer Aktion mit Button
ButtonEventDemo.java
package org.o7planning.javafx.button;

import java.util.Date;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class ButtonEventDemo extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        FlowPane root = new FlowPane();
        root.setPadding(new Insets(10));
        root.setHgap(10);
        root.setVgap(10);

        // Button
        Button button = new Button("Show Time");
        Label label = new Label("");

        button.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                label.setText(new Date().toString());
            }
        });

        root.getChildren().addAll(button,label);

        primaryStage.setTitle("Java Button (o7planning.org)");

        Scene scene = new Scene(root, 350, 150);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}
Beispiel

4- Die Effekt für das Button anwenden

Denn Button ist eine Class, die aus class Node ausgeweiterts wird. Deshalb können Sie die Effekte für Button anwenden. z.B  Drop Shadow Effekt... Sie können mehr Class über Effekt in Package javafx.scene.effect. finden-
Beispiel von Effekte von Drop Shadow und Motion Blur für Button wenn der Maus auf die Oberfläche von Button bewegt
ButtonEffectDemo.java
package org.o7planning.javafx.button;

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.effect.DropShadow;
import javafx.scene.effect.MotionBlur;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class ButtonEffectDemo extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        FlowPane root = new FlowPane();
        root.setPadding(new Insets(10));
        root.setHgap(10);
        root.setVgap(10);

        // --- Button 1 ------------
        Button button1 = new Button("Drop Shadow effect");

        DropShadow shadow = new DropShadow();

        // Adding the shadow when the mouse cursor is on
        button1.addEventHandler(MouseEvent.MOUSE_ENTERED, new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent e) {
                button1.setEffect(shadow);
            }
        });

        // Removing the shadow when the mouse cursor is off
        button1.addEventHandler(MouseEvent.MOUSE_EXITED, new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent e) {
                button1.setEffect(null);
            }
        });

        // --- Button 2 ------------
        Button button2 = new Button("Motion Blur effect");

        MotionBlur motionBlur = new MotionBlur();

        // Adding the Motion Blur effect when the mouse cursor is on
        button2.addEventHandler(MouseEvent.MOUSE_ENTERED, new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent e) {
                button2.setEffect(motionBlur);
            }
        });

        // Removing the Motion Blur effect when the mouse cursor is off
        button2.addEventHandler(MouseEvent.MOUSE_EXITED, new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent e) {
                button2.setEffect(null);
            }
        });

        root.getChildren().addAll(  button1, button2);

        primaryStage.setTitle("Java Button (o7planning.org)");

        Scene scene = new Scene(root, 350, 150);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}

5- Das Stil Button (Css Style)

Sie können die CSS in JavaFX benutzen und für Button anwenden. CSS in JavaFX ist so ähnlich wie CSS in HTML. Sie können die Style in file css definieren und mit Applikation melden. Und dann die von Ihnen definierten Style werden durch Methode setStyleClass.anwendet
außerdem können Sie mittels der Methode   setStyle  direkt auf Java Code fie Style für Button legen
button1.setStyle("-fx-font: 22 arial; -fx-base: #b6e7c9;");
Die Unterlagen über JavaFX Css in:
  • TODO Link!
Beispiel
ButtonCssDemo.java
package org.o7planning.javafx.button;

import java.io.InputStream;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class ButtonCssDemo extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        FlowPane root = new FlowPane();
        root.setPadding(new Insets(10));
        root.setHgap(10);
        root.setVgap(10);

   

        InputStream input = //
                getClass().getResourceAsStream("/org/o7planning/javafx/icon/java-32.png");

        Image image = new Image(input);
        ImageView imageView = new ImageView(image);

        // Button 1
        Button button1 = new Button("JavaFX", imageView);
       
        // Set Style
        button1.setStyle("-fx-font: 22 arial; -fx-base: #b6e7c9;");

        root.getChildren().add (button1 );

        primaryStage.setTitle("Java Button (o7planning.org)");

        Scene scene = new Scene(root, 350, 150);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}

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