feat: support round rect for bar chart

Cargo.toml

@@ -14,7 +14,7 @@ readme = "./README.md"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-charts-rs-derive = { path = "./charts-rs-derive", version = "0.2.0" }
+charts-rs-derive = { path = "./charts-rs-derive", version = "0.2.1" }
 fontdue = "0.8.0"
 image = { version = "0.25.1", features = [
     "webp",

src/charts/bar_chart.rs

@@ -80,6 +80,8 @@ pub struct BarChart {
     pub series_symbol: Option<Symbol>,
     pub series_smooth: bool,
     pub series_fill: bool,
+
+    pub radius: Option<f32>,
 }
 
 impl BarChart {
@@ -95,6 +97,9 @@ impl BarChart {
         if let Some(y_axis_hidden) = get_bool_from_value(&value, "y_axis_hidden") {
             b.y_axis_hidden = y_axis_hidden;
         }
+        if let Some(radius) = get_f32_from_value(&value, "radius") {
+            b.radius = Some(radius);
+        }
         Ok(b)
     }
     /// Creates a bar chart with custom theme.
@@ -245,6 +250,7 @@ impl BarChart {
             &y_axis_values_list,
             max_height,
             self.x_axis_data.len(),
+            self.radius,
         );
 
         let mut line_series_labels_list = self.render_line(
@@ -376,6 +382,7 @@ mod tests {
             bottom: 10.0,
             ..Default::default()
         });
+        bar_chart.radius = Some(5.0);
         bar_chart.y_axis_configs[0].axis_formatter = Some("{c} ml".to_string());
         bar_chart.series_list[0].label_show = true;
         bar_chart.legend_category = LegendCategory::Circle;

src/charts/util.rs

@@ -241,7 +241,7 @@ pub(crate) fn get_axis_values(params: AxisValueParams) -> AxisValues {
             unit = new_unit as f32;
         }
     }
-    let split_unit = unit as f32;
+    let split_unit = unit;
 
     let mut data = vec![];
     for i in 0..=split_number {