javafx背景以及颜色属性变化动画的实现

古城微笑少年丶 2023-06-09 13:23 8阅读 0赞

package sample;
    
    import java.util.Random;
    
    import javafx.animation.KeyFrame;
    import javafx.animation.KeyValue;
    import javafx.animation.Timeline;
    import javafx.application.Application;
    import javafx.beans.property.SimpleObjectProperty;
    import javafx.geometry.Pos;
    import javafx.scene.Scene;
    import javafx.scene.layout.VBox;
    import javafx.scene.paint.Color;
    import javafx.scene.paint.CycleMethod;
    import javafx.scene.paint.LinearGradient;
    import javafx.scene.paint.Stop;
    import javafx.scene.shape.Rectangle;
    import javafx.scene.text.Font;
    import javafx.scene.text.Text;
    import javafx.stage.Stage;
    import javafx.util.Duration;
    
    public class PaintAnimateApp extends Application {
        Color fromColor;
        Color toColor;
        SimpleObjectProperty<Color> fromColorPro = new SimpleObjectProperty<>();
        SimpleObjectProperty<Color> toColorPro = new SimpleObjectProperty<>();
        Timeline timeline = new Timeline();
        Random r = new Random();
        Duration loopTime = Duration.millis(1100);//渐变色变化周期
        //随机颜色
        private Color getRandomColor() {
            return Color.rgb(r.nextInt(256), r.nextInt(256), r.nextInt(256));
        }
    
        @Override
        public void start(Stage stage) throws Exception {
            // 颜色初始化
            fromColor = getRandomColor();
            toColor = getRandomColor();
            fromColorPro.set(fromColor);
            toColorPro.set(toColor);
    
            // 组件的设置
            VBox root = new VBox(30);
            root.setAlignment(Pos.CENTER);
            Text text = new Text("JavaFX渐变颜色动画");
            text.setFont(Font.font(30));
    
            Rectangle rect = new Rectangle(280, 58);
            root.getChildren().addAll(text, rect);
            stage.setTitle("渐变色动画");
            stage.setScene(new Scene(root, 500, 300));
    
            toColorPro.addListener((ob, oc, nv) -> {
                text.setFill(nv);
                rect.setFill(nv);
            });
            stage.show();
    
            addNewKeyFrames();
            timeline.setOnFinished(e -> {
                addNewKeyFrames();
                timeline.play();
            });
    
            timeline.play();
    
        }
    
        private void addNewKeyFrames() {
            timeline.getKeyFrames().clear();
            fromColor = getRandomColor();
            toColor = getRandomColor();
    
            KeyFrame kf2 = new KeyFrame(loopTime, new KeyValue(fromColorPro, fromColor),
                    new KeyValue(toColorPro, toColor));
            timeline.getKeyFrames().addAll(kf2);
        }
    
        public static void main(String[] args) {
            launch(args);
        }
    }