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Column Width Column Size

Is there a way to set the column width of a JavaFX row width?

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.stage.Stage;

public class BarChartSample extends Application {
    final static String austria = "Austria";
    final static String brazil = "Brazil";
    final static String france = "France";
    final static String italy = "Italy";
    final static String usa = "USA";

    @Override public void start(Stage stage) {
        stage.setTitle("Bar Chart Sample");
        final CategoryAxis xAxis = new CategoryAxis();
        final NumberAxis yAxis = new NumberAxis();
        final BarChart<String,Number> bc = 
            new BarChart<String,Number>(xAxis,yAxis);
        bc.setTitle("Country Summary");
        xAxis.setLabel("Country");       
        yAxis.setLabel("Value");

        XYChart.Series series1 = new XYChart.Series();
        series1.setName("2003");       
        series1.getData().add(new XYChart.Data(austria, 25601.34));
        series1.getData().add(new XYChart.Data(brazil, 20148.82));
        series1.getData().add(new XYChart.Data(france, 10000));
        series1.getData().add(new XYChart.Data(italy, 35407.15));
        series1.getData().add(new XYChart.Data(usa, 12000));      

        XYChart.Series series2 = new XYChart.Series();
        series2.setName("2004");
        series2.getData().add(new XYChart.Data(austria, 57401.85));
        series2.getData().add(new XYChart.Data(brazil, 41941.19));
        series2.getData().add(new XYChart.Data(france, 45263.37));
        series2.getData().add(new XYChart.Data(italy, 117320.16));
        series2.getData().add(new XYChart.Data(usa, 14845.27));  

        XYChart.Series series3 = new XYChart.Series();
        series3.setName("2005");
        series3.getData().add(new XYChart.Data(austria, 45000.65));
        series3.getData().add(new XYChart.Data(brazil, 44835.76));
        series3.getData().add(new XYChart.Data(france, 18722.18));
        series3.getData().add(new XYChart.Data(italy, 17557.31));
        series3.getData().add(new XYChart.Data(usa, 92633.68));  

        Scene scene  = new Scene(bc,800,600);
        bc.getData().addAll(series1, series2, series3);
        stage.setScene(scene);
        stage.show();
    }

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

For example, there is a way to set the size of a BarGap, but I cannot find a way to set the maximum column width of the columns.

Is there any way to solve this problem?

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2 answers

BarChartIt works on the basis that the user can set both barGap(gap between strips in one category) and categoryGap(gap between strips in separate categories), therefore, for a given chart size, the width of the bars is calculated internally every time a layout is requested.

, barGap, categoryGap. , .

. BarChart.layoutPlotChildren():

double catSpace = xAxis.getCategorySpacing();
double avilableBarSpace = catSpace - (bc.getCategoryGap() + bc.getBarGap());
double barWidth = (avilableBarSpace / bc.getData().size()) - bc.getBarGap();

, OP, (barGap=4, categoryGap=10), barWidth 37.4.

, 40, 10:

double maxBarWidth=40;
double minCategoryGap=10;

, barWidth categoryGap:

double barWidth=0;
do{
    double catSpace = xAxis.getCategorySpacing();
    double avilableBarSpace = catSpace - (bc.getCategoryGap() + bc.getBarGap());
    barWidth = (avilableBarSpace / bc.getData().size()) - bc.getBarGap();
    if(barWidth > maxBarWidth){
        avilableBarSpace=(maxBarWidth + bc.getBarGap())* bc.getData().size();
        bc.setCategoryGap(catSpace-avilableBarSpace-bc.getBarGap());
    }
} while(barWidth>maxBarWidth);

do-while: categoryGap . .

, .

, , :

double barWidth=0;
do{
    double catSpace = xAxis.getCategorySpacing();
    double avilableBarSpace = catSpace - (minCategoryGap + bc.getBarGap());
    barWidth = Math.min(maxBarWidth, (avilableBarSpace / bc.getData().size()) - bc.getBarGap());
    avilableBarSpace=(barWidth + bc.getBarGap())* bc.getData().size();
    bc.setCategoryGap(catSpace-avilableBarSpace-bc.getBarGap());
} while(barWidth < maxBarWidth && bc.getCategoryGap()>minCategoryGap);

:

    ...
    Scene scene  = new Scene(bc,800,600);
    bc.getData().addAll(series1, series2, series3);
    stage.setScene(scene);
    stage.show();

    double maxBarWidth=40;
    double minCategoryGap=10;

    scene.widthProperty().addListener((obs,n,n1)->{
        if(bc.getData().size()==0) return;

        if(n!=null && (n1.doubleValue()>n.doubleValue())){
            double barWidth=0;
            do{
                double catSpace = xAxis.getCategorySpacing();
                double avilableBarSpace = catSpace - (bc.getCategoryGap() + bc.getBarGap());
                barWidth = (avilableBarSpace / bc.getData().size()) - bc.getBarGap();
                if (barWidth >maxBarWidth){
                    avilableBarSpace=(maxBarWidth + bc.getBarGap())* bc.getData().size();
                    bc.setCategoryGap(catSpace-avilableBarSpace-bc.getBarGap());
                }
            } while(barWidth>maxBarWidth);
        }

        if(n!=null && (n1.doubleValue()<n.doubleValue()) && bc.getCategoryGap()>minCategoryGap){
            double barWidth=0;
            do{
                double catSpace = xAxis.getCategorySpacing();
                double avilableBarSpace = catSpace - (minCategoryGap + bc.getBarGap());
                barWidth = Math.min(maxBarWidth, (avilableBarSpace / bc.getData().size()) - bc.getBarGap());
                avilableBarSpace=(barWidth + bc.getBarGap())* bc.getData().size();
                bc.setCategoryGap(catSpace-avilableBarSpace-bc.getBarGap());
            } while(barWidth < maxBarWidth && bc.getCategoryGap()>minCategoryGap);
        }
    });

, barWidth .

+4

. . BarGap CategoryGap . , , . 30 ( ?), 100 cribbage ( ), .

 Pane barchart1 = new Pane;
 CategoryAxis xAxis = new CategoryAxis();
 NumberAxis yAxis = new NumberAxis(0,25,1);
 BarChart<String, Number> bc1 =
        new BarChart<String, Number>(xAxis, yAxis);
    // create Player chart
    bc1.setTitle(G.getPlayerName(0));
    bc1.setTitle(null);
    xAxis1.setLabel("Round");
    yAxis1.setLabel("Points");
    XYChart.Series series1 = new XYChart.Series();
    series1.setName("Pegging");
    XYChart.Series series3 = new XYChart.Series();
    series3.setName("Hand");
    XYChart.Series series5 = new XYChart.Series();
    series5.setName("Box");

    for (int i = 0; i < G.getRoundsSize(); i++) {
        series1.getData().add(new XYChart.Data(Integer.toString(i + 1), G.getRound(i).getPlayerRoundData(0).getPegPoints()));
        series3.getData().add(new XYChart.Data(Integer.toString(i + 1), G.getRound(i).getPlayerRoundData(0).getHandPoints()));
        series5.getData().add(new XYChart.Data(Integer.toString(i + 1), G.getRound(i).getPlayerRoundData(0).getBoxPoints()));
    }
    bc1.getData(). addAll(series1, series3, series5);
    bc1.setBarGap(0);
    bc1.setCategoryGap(1.0);
    bc1.setMaxHeight(180);
    bc1.setMinHeight(180);
    if(G.getRoundsSize() < 8){
        int wid = ((G.getRoundsSize() * 100) + 30);
        bc1.setMaxWidth(wid);
        bc1.setMinWidth(wid);
    } else {
        bc1.setMaxWidth(830);
        bc1.setMinWidth(830);
    }
    barchart1.getChildren().add(bc1);
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