JavaFX我想完全保存Chart-Image [英] JavaFX I want to save Chart-Image completely

问题描述

这是我的代码。

    import java.io.File;
    import java.util.LinkedHashMap;
    import java.util.Map.Entry;

    import javafx.application.Application;
    import javafx.embed.swing.SwingFXUtils;
    import javafx.scene.Scene;
    import javafx.scene.chart.CategoryAxis;
    import javafx.scene.chart.LineChart;
    import javafx.scene.chart.NumberAxis;
    import javafx.scene.chart.XYChart;
    import javafx.scene.chart.XYChart.Series;
    import javafx.scene.image.WritableImage;
    import javafx.stage.Stage;

    import javax.imageio.ImageIO;

    public class SceneToImageAndWrite extends Application {

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

        @Override
        public void start(Stage stage) throws Exception {
            stage.setTitle("Primary Stage");

            final CategoryAxis xAxis = new CategoryAxis();
            xAxis.setLabel("Animals");
            final NumberAxis yAxis = new NumberAxis();
            yAxis.setLabel("Number");

            final LineChart lineChart = new LineChart(xAxis, yAxis);
            lineChart.setTitle("Line Chart");

            XYChart.Series series1 = new Series();
            series1.setName("Series");

            /** xAxis & yAxis Data */
            LinkedHashMap map = new LinkedHashMap();      
            map.put("dog", 12);
            map.put("cat", 3);
            map.put("bear", 8);
            map.put("tiger", 20);

            for(Entry entry : map.entrySet()) {
                series1.getData().add(new XYChart.Data(entry.getKey(), entry.getValue()));
            }

            lineChart.getData().add(series1);

            Scene scene = new Scene(lineChart);

            stage.setScene(scene);
            stage.show();

            WritableImage snapShot = scene.snapshot(null);

            ImageIO.write(SwingFXUtils.fromFXImage(snapShot, null), "png", new File("test.png"));
        }
    }

...

Saved-image没有一个图表数据。我想完全保存Chart-Image。

Frame is great but...
Saved-image hasn't a little chart-data. I want to save Chart-Image completely.

推荐答案

关闭动画。

从快照 javadoc：

当应用程序显式地或者隐式地（例如图表动画），则快照将基于在拍摄快照时的场景图形的状态来呈现，并且将不反映任何后续的动画改变。

When taking a snapshot of a scene that is being animated, either explicitly by the application or implicitly (such as chart animation), the snapshot will be rendered based on the state of the scene graph at the moment the snapshot is taken and will not reflect any subsequent animation changes.

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