How to dynamically change the graphic style css?

What is the right method to dynamically replace the graphic style of JavaFx 2.2 in the code? I modified the example in the tutorial below with or without loading the css file. So far, I am unable to replace the style from the code. My goal is to dynamically set the width of each line. We use Java with Eclipse on Windows 7 (64-bit) 7_51. The CSS generated in the code below works when it is in the file. There must be a better way than to write a new file and read it, right?

      String title = "Chart Title";
      stage.setTitle("Stage Title");
      final LogAxis xAxis = new NumberAxis();
      final NumberAxis yAxis = new NumberAxis();
      final LineChart<Number, Number> chart = new LineChart<>(xAxis, yAxis);
      chart.setTitle(title);
      chart.setLegendVisible(false);
      chart.setCreateSymbols(false);
      xAxis.setLabel("x-axis");
      yAxis.setLabel("y-axis");

      // each bar is a line from x,0 to x,y
      int width = 24; // pixels
      for (int i = 0; i < ydata.length; i++)
      {
         String css = "";
         // TODO: dynamically calculate unique width for each "bar"
         final XYChart.Series data = new XYChart.Series();
         data.setName("Series" + (i + 1));
         data.getData().add(new XYChart.Data(xdata[i], 0.0f));
         data.getData().add(new XYChart.Data(xdata[i], ydata[i]));
         chart.getData().add(data);
         // Dynamically set style instead of reading from file
         // Assign each "bar" data series a color and line width
         css += ".chart-series-line{ -fx-stroke: red; -fx-stroke-width: ";
         css += width;
         css += "px; }\n";
         data.getNode().setStyle(css);
         System.out.println("node style: " + data.getNode().getStyle());
         System.out.println("node style class: " + data.getNode().getStyleClass());
         width *= 3; // TODO: replace this with dynamic calculation of width
      } // end for

      final Scene scene = new Scene(chart, 800, 600);
      scene.getStylesheets().add("Chart.css");
      System.out.println("Scene stylesheet: " + scene.getStylesheets());
      System.out.println("chart style: " + chart.getStyle());
      System.out.println("chart style class: " + chart.getStyleClass());
      System.out.println("chart style sheet: " + chart.getStylesheets());
      stage.setScene(scene);
      stage.show();

The Node #setStyle (String) method only supports the statements, not the rule full css. The setStyle call with '.chart-series-line {-fx-stroke...} '. "should give an error in the parser. Something like "whereas IDENT.

You might find the line you want in the series. If series.getNode () is a form (as it will be for a line chart), you can just get the node in a form and call the setStrokeWidth() directly.

Tags: Java

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970829 wrote:

Please update your forum profile with a real handle instead of '970829 '.

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