Added ability to set labels and margins

Author: siefkenj

examples/layout.rs

@@ -9,7 +9,22 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     root.fill(&full_palette::WHITE)?;
 
     let mut chart = ChartLayout::new(&root);
-    chart.set_title_text("Chart Title")?.draw()?;
+    chart
+        .set_chart_title_text("Chart Title")?
+        .set_top_label_text("A label at the top")?
+        .set_chart_title_style(("serif", 60.).into_font().with_color(&RED))?
+        .set_left_label_text("Left label")?
+        .set_right_label_text("Right label")?
+        .set_bottom_label_text("Bottom label")?
+        .set_bottom_label_margin(10.)?
+        .set_top_label_margin(10.)?
+    .draw()?;
+
+    let extent = chart.get_chart_area_extent()?;
+    root.draw(&Rectangle::new(extent.into_array_of_tuples(), &BLUE))?;
+    let extent = chart.get_chart_title_extent()?;
+    root.draw(&Rectangle::new(extent.into_array_of_tuples(), &BLUE))?;
+    //dbg!();
 
     Ok(())
 }