java - How to animate LinearGradient on JavaFX? - Stack Overflow
Thu Feb 11 2021 10:17:52 GMT+0000 (Coordinated Universal Time)
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@jasoncriss
import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.util.Duration;
public class AnimatedGradient extends Application {
@Override
public void start(Stage primaryStage) {
StackPane root = new StackPane();
Label label = new Label("Animated gradient");
root.getChildren().add(label);
label.getStyleClass().add("animated-gradient");
Scene scene = new Scene(root,400,400);
scene.getStylesheets().add(getClass().getResource("animated-gradient.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
ObjectProperty<Color> baseColor = new SimpleObjectProperty<>();
KeyValue keyValue1 = new KeyValue(baseColor, Color.RED);
KeyValue keyValue2 = new KeyValue(baseColor, Color.YELLOW);
KeyFrame keyFrame1 = new KeyFrame(Duration.ZERO, keyValue1);
KeyFrame keyFrame2 = new KeyFrame(Duration.millis(500), keyValue2);
Timeline timeline = new Timeline(keyFrame1, keyFrame2);
baseColor.addListener((obs, oldColor, newColor) -> {
label.setStyle(String.format("-gradient-base: #%02x%02x%02x; ",
(int)(newColor.getRed()*255),
(int)(newColor.getGreen()*255),
(int)(newColor.getBlue()*255)));
});
timeline.setAutoReverse(true);
timeline.setCycleCount(Animation.INDEFINITE);
timeline.play();
}
public static void main(String[] args) {
launch(args);
}
}
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https://stackoverflow.com/questions/24587342/how-to-animate-lineargradient-on-javafx
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