fix hovertext dimension to be matrix / 2d array type (#387)

Signed-off-by: Andrei Gherghescu <8067229+andrei-ng@users.noreply.github.com>

Author: andrei-ng

examples/scientific_charts/src/main.rs

@@ -2,7 +2,7 @@
 
 use std::f64::consts::PI;
 
-use plotly::common::{ColorScale, ColorScalePalette, Font};
+use plotly::common::{ColorScale, ColorScalePalette, Font, HoverInfo};
 use plotly::contour::Contours;
 use plotly::{Contour, HeatMap, Layout, Plot};
 use plotly_utils::write_example_to_html;
@@ -124,7 +124,15 @@ fn customizing_spacing_between_x_and_y_ticks(show: bool, file_name: &str) {
 // ANCHOR: basic_heat_map
 fn basic_heat_map(show: bool, file_name: &str) {
     let z = vec![vec![1, 20, 30], vec![20, 1, 60], vec![30, 60, 1]];
-    let trace = HeatMap::new_z(z).zmin(1.0).zmax(60.0);
+    let trace = HeatMap::new_z(z)
+        .zmin(1.0)
+        .zmax(60.0)
+        .hover_info(HoverInfo::Text)
+        .hover_text_matrix(vec![
+            vec!["A", "B", "C"],
+            vec!["D", "E", "F"],
+            vec!["G", "H", "I"],
+        ]);
     let mut plot = Plot::new();
     plot.add_trace(trace);
 

plotly/src/traces/heat_map.rs

@@ -86,7 +86,8 @@ where
     #[serde(rename = "hovertemplate")]
     hover_template: Option<Dim<String>>,
     #[serde(rename = "hovertext")]
-    hover_text: Option<Vec<String>>,
+    #[field_setter(with_matrix)]
+    hover_text: Option<Dim<String>>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
     #[serde(rename = "legendgrouptitle")]
@@ -99,7 +100,8 @@ where
     show_legend: Option<bool>,
     #[serde(rename = "showscale")]
     show_scale: Option<bool>,
-    text: Option<Vec<String>>,
+    #[field_setter(with_matrix)]
+    text: Option<Dim<String>>,
     transpose: Option<bool>,
     visible: Option<Visible>,
     x: Option<Vec<X>>,
@@ -214,15 +216,15 @@ mod tests {
         .hover_on_gaps(true)
         .hover_template("tmpl")
         .hover_template_array(vec!["tmpl1", "tmpl2"])
-        .hover_text(vec!["hov", "er"])
+        .hover_text_array(vec!["hov", "er"])
         .legend_group("1")
         .legend_group_title("Legend Group Title")
         .name("name")
         .opacity(0.99)
         .reverse_scale(false)
         .show_legend(true)
         .show_scale(false)
-        .text(vec!["te", "xt"])
+        .text_array(vec!["te", "xt"])
         .transpose(true)
         .visible(Visible::LegendOnly)
         .x_axis("x")