Remove changing the line_color in Curve when marker_void is true

Author: cpmech

src/curve.rs

@@ -473,13 +473,6 @@ impl Curve {
 
     /// Returns options for curve
     fn options(&self) -> String {
-        // fix color if marker is void
-        let line_color = if self.marker_void && self.line_color == "" {
-            "red"
-        } else {
-            &self.line_color
-        };
-
         // output
         let mut opt = String::new();
 
@@ -492,8 +485,8 @@ impl Curve {
         if self.line_alpha > 0.0 {
             write!(&mut opt, ",alpha={}", self.line_alpha).unwrap();
         }
-        if line_color != "" {
-            write!(&mut opt, ",color='{}'", line_color).unwrap();
+        if self.line_color != "" {
+            write!(&mut opt, ",color='{}'", self.line_color).unwrap();
         }
         if self.line_style != "" {
             write!(&mut opt, ",linestyle='{}'", self.line_style).unwrap();

tests/test_curve.rs

@@ -20,15 +20,15 @@ fn test_curve() -> Result<(), StrError> {
         .set_marker_void(false)
         .set_marker_line_color("#cda500")
         .set_marker_line_width(3.0)
-        .set_marker_size(8.0)
+        .set_marker_size(15.0)
         .set_marker_style("p");
 
     // another curve
     let mut curve2 = Curve::new();
     curve2
         .set_line_style("None")
-        .set_marker_line_color("#1862ab")
-        .set_marker_style("8")
+        .set_marker_style("o")
+        .set_marker_size(20.0)
         .set_marker_void(true);
 
     let mut curve3 = Curve::new();