added parameters for styling line cap and join

chartfx-chart/src/main/java/io/fair_acc/chartfx/renderer/spi/BasicDataSetRenderer.java

@@ -55,10 +55,8 @@
         int numCoords;
 
         gc.save();
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
-        gc.setFill(style.getLineColor());
+        style.applyLineStrokeStyle(gc);
+        gc.setFill(style.getMarkerColor());
 
         // compute local screen coordinates
         double xi, yi, prevX = Double.NaN, prevY = Double.NaN;

chartfx-chart/src/main/java/io/fair_acc/chartfx/renderer/spi/ErrorDataSetRenderer.java

@@ -7,7 +7,6 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import io.fair_acc.chartfx.marker.DefaultMarker;
 import io.fair_acc.chartfx.marker.Marker;
 import io.fair_acc.chartfx.renderer.ErrorStyle;
 import io.fair_acc.chartfx.renderer.Renderer;
@@ -621,9 +620,7 @@ protected static void drawPolyLineHistogram(final GraphicsContext gc, final Data
         newY[length - 1] = points.yZero;
 
         gc.save();
-        gc.setStroke(style.getLineColor());
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
+        style.applyLineStrokeStyle(gc);
 
         for (int i = 0; i < length - 1; i++) {
             final double x1 = newX[i];
@@ -654,11 +651,7 @@ protected static void drawPolyLineHistogramBezier(final GraphicsContext gc,
                 points.actualDataCount);
 
         gc.save();
-
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
-        gc.setFill(gc.getStroke());
+        style.applyLineStrokeStyle(gc);
 
         gc.beginPath();
         for (int i = 0; i < n - 1; i++) {
@@ -724,11 +717,7 @@ protected static void drawPolyLineHistogramFilled(final GraphicsContext gc,
 
     protected static void drawPolyLineLine(final GraphicsContext gc, final DataSetNode style, final CachedDataPoints points) {
         gc.save();
-
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
-        gc.setFill(gc.getStroke());
+        style.applyLineStrokeStyle(gc);
 
         if (points.allowForNaNs) {
             gc.beginPath();
@@ -798,11 +787,7 @@ protected static void drawPolyLineStairCase(final GraphicsContext gc, final Data
         newY[length - 1] = points.yValues[n - 1];
 
         gc.save();
-
-        gc.setStroke(style.getLineColor());
-        gc.setFill(gc.getStroke());
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
+        style.applyLineStrokeStyle(gc);
 
         // gc.strokePolyline(newX, newY, 2*n);
 

chartfx-chart/src/main/java/io/fair_acc/chartfx/renderer/spi/HistogramRenderer.java

@@ -162,10 +162,7 @@
         final boolean isHistogram = ds instanceof Histogram;
 
         gc.save();
-
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
+        style.applyLineStrokeStyle(gc);
         gc.setFill(style.getLineColor());
 
         for (int i = 0; i < nRange; i++) {
@@ -275,9 +272,7 @@
         newY[2 * (nRange + 1) - 1] = axisMin;
 
         gc.save();
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
+        style.applyLineStrokeStyle(gc);
 
         drawPolygon(gc, newX, newY, filled, isVerticalDataSet, 2 * nRange + 2);
 
@@ -315,9 +310,7 @@
         BezierCurve.calcCurveControlPoints(xValues, yValues, xCp1, yCp1, xCp2, yCp2, nRange);
 
         gc.save();
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
+        style.applyLineStrokeStyle(gc);
 
         gc.beginPath();
         for (int i = 0; i < nRange - 1; i++) {
@@ -387,9 +380,7 @@
             gc.setFill(style.getLineColor());
             gc.fill();
         } else {
-            gc.setLineWidth(style.getLineWidth());
-            gc.setLineDashes(style.getLineDashes());
-            gc.setStroke(style.getLineColor());
+            style.applyLineStrokeStyle(gc);
             gc.stroke();
         }
 
@@ -433,9 +424,7 @@
         newY[2 * nRange - 1] = newY[2 * (nRange - 1)];
 
         gc.save();
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
+        style.applyLineStrokeStyle(gc);
 
         drawPolygon(gc, newX, newY, filled, isVerticalDataSet, 2 * nRange);
         gc.restore();

chartfx-chart/src/main/java/io/fair_acc/chartfx/renderer/spi/ReducingLineRenderer.java

@@ -7,22 +7,11 @@
 import static io.fair_acc.dataset.DataSet.DIM_X;
 import static io.fair_acc.dataset.DataSet.DIM_Y;
 
-import java.security.InvalidParameterException;
-import java.util.ArrayList;
-import java.util.List;
-
-import javafx.collections.ObservableList;
-import javafx.scene.canvas.Canvas;
 import javafx.scene.canvas.GraphicsContext;
 
-import io.fair_acc.chartfx.Chart;
-import io.fair_acc.chartfx.XYChart;
-import io.fair_acc.chartfx.axes.Axis;
-import io.fair_acc.chartfx.axes.spi.CategoryAxis;
 import io.fair_acc.chartfx.renderer.Renderer;
 import io.fair_acc.chartfx.ui.css.DataSetNode;
 import io.fair_acc.dataset.DataSet;
-import io.fair_acc.dataset.utils.ProcessingProfiler;
 
 /**
  * Simple, uncomplicated reducing line renderer
@@ -55,9 +44,7 @@
     @Override
     protected void render(GraphicsContext gc, DataSet ds, DataSetNode style) {
         gc.save();
-        gc.setLineWidth(style.getLineWidth());
-        gc.setLineDashes(style.getLineDashes());
-        gc.setStroke(style.getLineColor());
+        style.applyLineStrokeStyle(gc);
 
         if (ds.getDataCount() > 0) {
             final int indexMin = Math.max(0, ds.getIndex(DIM_X, xMin));

chartfx-chart/src/main/java/io/fair_acc/chartfx/ui/css/DataSetNodeParameter.java

@@ -9,8 +9,11 @@
 import javafx.css.*;
 import javafx.scene.Node;
 import javafx.scene.Parent;
+import javafx.scene.canvas.GraphicsContext;
 import javafx.scene.paint.Color;
 import javafx.scene.paint.Paint;
+import javafx.scene.shape.StrokeLineCap;
+import javafx.scene.shape.StrokeLineJoin;
 
 import io.fair_acc.chartfx.marker.DefaultMarker;
 import io.fair_acc.chartfx.marker.Marker;
@@ -61,6 +64,9 @@
     private final ObjectBinding<Paint> lineFillPattern = hatchFillPattern(intensifiedLineColor);
     private final ObjectProperty<Number[]> lineDashArray = addOnChange(css().createNumberArrayProperty(this, "lineDashArray", null));
     private final ObjectBinding<double[]> lineDashes = StyleUtil.toUnboxedDoubleArray(lineDashArray);
+    private final DoubleProperty lineMiterLimit = addOnChange(css().createDoubleProperty(this, "lineMiterLimit", 1d));
+    private final ObjectProperty<StrokeLineJoin> lineJoin = addOnChange(css().createEnumProperty(this, "lineJoin", StrokeLineJoin.BEVEL, true, StrokeLineJoin.class));
+    private final ObjectProperty<StrokeLineCap> lineCap = addOnChange(css().createEnumProperty(this, "lineCap", StrokeLineCap.BUTT, true, StrokeLineCap.class));
 
     // ======================== Overriden accessors ========================
 
@@ -320,8 +326,58 @@
         return lineDashes;
     }
 
+    public double getLineMiterLimit() {
+        return lineMiterLimit.get();
+    }
+
+    public DoubleProperty lineMiterLimitProperty() {
+        return lineMiterLimit;
+    }
+
+    public void setLineMiterLimit(double lineMiterLimit) {
+        this.lineMiterLimit.set(lineMiterLimit);
+    }
+
+    public StrokeLineJoin getLineJoin() {
+        return lineJoin.get();
+    }
+
+    public ObjectProperty<StrokeLineJoin> lineJoinProperty() {
+        return lineJoin;
+    }
+
+    public void setLineJoin(StrokeLineJoin lineJoin) {
+        this.lineJoin.set(lineJoin);
+    }
+
+    public StrokeLineCap getLineCap() {
+        return lineCap.get();
+    }
+
+    public ObjectProperty<StrokeLineCap> lineCapProperty() {
+        return lineCap;
+    }
+
+    public void setLineCap(StrokeLineCap lineCap) {
+        this.lineCap.set(lineCap);
+    }
+
     // ======================== Utility methods ========================
 
+    /**
+     * Sets all styles that apply to a gc.strokeLine() call.
+     *
+     * @param gc target context
+     */
+    public void applyLineStrokeStyle(GraphicsContext gc) {
+        gc.setMiterLimit(getLineMiterLimit());
+        gc.setLineJoin(getLineJoin());
+        gc.setLineCap(getLineCap());
+        gc.setLineWidth(getLineWidth());
+        gc.setLineDashes(getLineDashes());
+        gc.setStroke(getLineColor());
+    }
+
     protected ObjectBinding<Paint> intensifiedColor(ObservableValue<Paint> base) {
         return Bindings.createObjectBinding(() -> getIntensifiedColor(base.getValue()), base, intensity);
     }

chartfx-chart/src/main/resources/io/fair_acc/chartfx/chart.css

@@ -293,6 +293,9 @@
   -fx-marker-line-width: 0.5;
   -fx-line-color: -color-dataset;
   -fx-line-width: 1;
+  -fx-line-miter-limit: 1;
+  -fx-line-cap: butt;
+  -fx-line-join: bevel;
 }
 .dataset.default-color0 {
   -color-dataset: -color-dataset-1;

chartfx-chart/src/main/resources/io/fair_acc/chartfx/chart.scss

@@ -270,6 +270,9 @@ $null: null; // null gets removed from Sass. Maybe create a placeholder and repl
   -fx-line-color: -color-dataset;
   -fx-line-width: 1.0; // 0 to disable
   -fx-line-dash-array: null;
+  -fx-line-miter-limit: 1.0;
+  -fx-line-cap: butt;
+  -fx-line-join: bevel;
 
 }
 
@@ -396,4 +399,4 @@ $null: null; // null gets removed from Sass. Maybe create a placeholder and repl
   -fx-stroke: derive(-fx-text-background-color, 40%);
 }
 
-@include financial.financial-themes();
+@include financial.financial-themes();