[Important] Make set super title to receive a reference to SuperTitle…

…Params. Impl clone for SuperTitleParams

src/plot.rs

@@ -431,7 +431,7 @@ impl Plot {
     /// 2. The TeX handling in the super-title string is more limited than in the title string
     ///    because we cannot use Python's raw string notation (`r''`) here. The reason is that we want
     ///    the super-title to be wrapped if it is too long and only non-raw strings can do that.
-    pub fn set_super_title(&mut self, title: &str, params: Option<SuperTitleParams>) -> &mut Self {
+    pub fn set_super_title(&mut self, title: &str, params: Option<&SuperTitleParams>) -> &mut Self {
         let t = title.replace("'", "’");
         match params {
             Some(p) => write!(&mut self.buffer, "st=plt.suptitle('{}'{})\n", t, p.options()).unwrap(),
@@ -1265,7 +1265,7 @@ mod tests {
             .set_fontsize(12.0)
             .set_fontweight(10.0);
         let mut plot = Plot::new();
-        plot.set_super_title("all subplots", Some(params));
+        plot.set_super_title("all subplots", Some(&params));
         let b: &str =
             "st=plt.suptitle('all subplots',x=123.3,y=456.7,ha='left',va='bottom',fontsize=12,fontweight=10)\n\
                        add_to_ea(st)\n";

src/super_title_params.rs

@@ -1,6 +1,7 @@
 use std::fmt::Write;
 
 /// Holds parameters for the SuperTitle
+#[derive(Clone)]
 pub struct SuperTitleParams {
     /// The x location of the text in figure coordinates (default = 0.5)
     x: Option<f64>,
@@ -120,6 +121,13 @@ mod tests {
         assert_eq!(params.fontweight, 0.0);
     }
 
+    #[test]
+    fn clone_works() {
+        let params = SuperTitleParams::new();
+        let clone = params.clone();
+        assert_eq!(clone.fontsize, 0.0);
+    }
+
     #[test]
     fn options_works() {
         let mut params = SuperTitleParams::new();

tests/test_plot.rs

@@ -220,7 +220,7 @@ fn test_plot_subplots() -> Result<(), StrError> {
 
     // configure plot
     let mut plot = Plot::new();
-    plot.set_super_title("\"$\\int$ Plot's Owner Says $\\mathrm{d}\\sigma$\": This is the \"super title\", \\n followed by a very long text to see \\n if this whole thing will be wrapped or not \\n we hope that it gets wrapped and beautifully formatted.\"", Some(params))
+    plot.set_super_title("\"$\\int$ Plot's Owner Says $\\mathrm{d}\\sigma$\": This is the \"super title\", \\n followed by a very long text to see \\n if this whole thing will be wrapped or not \\n we hope that it gets wrapped and beautifully formatted.\"", Some(&params))
         .set_horizontal_gap(0.5)
         .set_vertical_gap(0.5)
         .set_gaps(0.3, 0.3);