Question

所以我有了这个JavaFX应用程序，我用SceneBuilder创建了4个饼图并将它们添加到场景中。然后我查询我的数据库以获取一些数据，并将其设置为下面方法中的饼图。然而，发生了一些非常奇怪的事如果我在更新发生时查看当前场景，一切正常。如果我正在查看不同的场景，则不会显示饼图。请帮忙。如果重要，get方法不涉及任何计算。

字段：

@FXML
    private PieChart pieGender;
    @FXML
    private PieChart pieAge;
    @FXML
    private PieChart pieIncome;
    @FXML
    private PieChart pieContext;

更新方法：

//extracts and display data on this panel
    public synchronized void updatePanelData() {
        //update from the fx thread
        Platform.runLater(() -> {
            ObservableList<PieChart.Data> gender = FXCollections.observableArrayList(
                    new PieChart.Data("Male", this.dataRetriever.getGenderMale()),
                    new PieChart.Data("Female", this.dataRetriever.getGenderFemale())
            );

            this.pieGender.setData(gender);

            ObservableList<PieChart.Data> age = FXCollections.observableArrayList(
                    new PieChart.Data("<25", this.dataRetriever.getAgeLessThan25()),
                    new PieChart.Data("25-34", this.dataRetriever.getAge25To34()),
                    new PieChart.Data("35-44", this.dataRetriever.getAge35To44()),
                    new PieChart.Data("45-54", this.dataRetriever.getAge45To54()),
                    new PieChart.Data(">54", this.dataRetriever.getAgeOver54())
            );

            this.pieAge.setData(age);

            ObservableList<PieChart.Data> income = FXCollections.observableArrayList(
                    new PieChart.Data("Low", this.dataRetriever.getLowIncome()),
                    new PieChart.Data("Medium", this.dataRetriever.getMedIncome()),
                    new PieChart.Data("High", this.dataRetriever.getHighIncome())
            );

            this.pieIncome.setData(income);

            ObservableList<PieChart.Data> context = FXCollections.observableArrayList(
                    new PieChart.Data("News", this.dataRetriever.getContextNews()),
                    new PieChart.Data("Shopping", this.dataRetriever.getContextShopping()),
                    new PieChart.Data("Social Media", this.dataRetriever.getContextSocialMedia()),
                    new PieChart.Data("Blog", this.dataRetriever.getContextBlog()),
                    new PieChart.Data("Hobbies", this.dataRetriever.getContextHobbies()),
                    new PieChart.Data("Travel", this.dataRetriever.getContextTravel())
            );

            this.pieContext.setData(context);


            this.labelClick.setText(this.dataRetriever.getNumberOfClicks().toString());
            this.labelServer.setText(this.dataRetriever.getServerNumber().toString());
            this.labelImpression.setText(this.dataRetriever.getNumberOfImpressions().toString());

            this.updateDateFilter();
        });
    }

如果在更新发生时我没有查看饼图的场景会发生什么：

JavaFX饼图未显示

0 个答案: