Fix the formatting issue

Author: 38

examples/3d-plot.rs

@@ -1,13 +1,15 @@
 use plotters::prelude::*;
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let area = SVGBackend::new("plotters-doc-data/3d-plot.svg", (600, 400)).into_drawing_area();
+    let area = SVGBackend::new("plotters-doc-data/3d-plot.svg", (1024, 760)).into_drawing_area();
+
     area.fill(&WHITE)?;
+
     let x_axis = (-3.0..3.0).step(0.1);
     let z_axis = (-3.0..3.0).step(0.1);
 
     let mut chart = ChartBuilder::on(&area)
         .caption(format!("3D Plot Test"), ("sans", 20))
-        .build_cartesian_3d(-3.0..3.0, -3.0..3.0, -3.0..3.0)?;
+        .build_cartesian_3d(x_axis.clone(), -3.0..3.0, z_axis.clone())?;
 
     chart.with_projection(|mut pb| {
         pb.yaw = 0.5;
@@ -17,17 +19,15 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     chart.configure_axes().draw()?;
 
-    let surface = SurfaceSeries::<f64, f64, f64>::new(
-        x_axis.values(),
-        z_axis.values(),
-        |&x, &z| (x * x + z * z).cos(),
-        &BLUE.mix(0.2),
-    );
-
     chart
-        .draw_series(surface)?
+        .draw_series(SurfaceSeries::<f64, _, f64>::new(
+            x_axis.values(),
+            z_axis.values(),
+            |&x, &z| (x * x + z * z).cos(),
+            &BLUE.mix(0.2),
+        ))?
         .label("Surface")
-        .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &BLUE));
+        .legend(|(x, y)| Rectangle::new([(x + 5, y - 5), (x + 15, y + 5)], BLUE.mix(0.5).filled()));
 
     chart
         .draw_series(LineSeries::new(

src/coord/ranged1d/types/numeric.rs

@@ -2,7 +2,8 @@ use std::convert::TryFrom;
 use std::ops::Range;
 
 use crate::coord::ranged1d::{
-    AsRangedCoord, DefaultFormatting, DiscreteRanged, KeyPointHint, Ranged, ReversibleRanged,
+    AsRangedCoord, DefaultFormatting, DiscreteRanged, KeyPointHint, NoDefaultFormatting, Ranged,
+    ReversibleRanged, ValueFormatter,
 };
 
 macro_rules! impl_discrete_trait {
@@ -58,7 +59,7 @@ macro_rules! impl_reverse_mapping_trait {
     };
 }
 macro_rules! make_numeric_coord {
-    ($type:ty, $name:ident, $key_points:ident, $doc: expr) => {
+    ($type:ty, $name:ident, $key_points:ident, $doc: expr, $fmt: ident) => {
         #[doc = $doc]
         #[derive(Clone)]
         pub struct $name($type, $type);
@@ -68,7 +69,7 @@ macro_rules! make_numeric_coord {
             }
         }
         impl Ranged for $name {
-            type FormatOption = DefaultFormatting;
+            type FormatOption = $fmt;
             type ValueType = $type;
             #[allow(clippy::float_cmp)]
             fn map(&self, v: &$type, limit: (i32, i32)) -> i32 {
@@ -96,6 +97,9 @@ macro_rules! make_numeric_coord {
             }
         }
     };
+    ($type:ty, $name:ident, $key_points:ident, $doc: expr) => {
+        make_numeric_coord!($type, $name, $key_points, $doc, DefaultFormatting);
+    }
 }
 
 macro_rules! gen_key_points_comp {
@@ -207,16 +211,28 @@ make_numeric_coord!(
     f32,
     RangedCoordf32,
     compute_f32_key_points,
-    "The ranged coordinate for type f32"
+    "The ranged coordinate for type f32",
+    NoDefaultFormatting
 );
 impl_reverse_mapping_trait!(f32, RangedCoordf32);
+impl ValueFormatter<f32> for RangedCoordf32 {
+    fn format(value: &f32) -> String {
+        crate::data::float::pretty_print_float(*value as f64, false)
+    }
+}
 make_numeric_coord!(
     f64,
     RangedCoordf64,
     compute_f64_key_points,
-    "The ranged coordinate for type f64"
+    "The ranged coordinate for type f64",
+    NoDefaultFormatting
 );
 impl_reverse_mapping_trait!(f64, RangedCoordf64);
+impl ValueFormatter<f64> for RangedCoordf64 {
+    fn format(value: &f64) -> String {
+        crate::data::float::pretty_print_float(*value, false)
+    }
+}
 make_numeric_coord!(
     u32,
     RangedCoordu32,