Add show/hideLegend option to Figure

Author: pbugnion

src/main/scala/co/theasi/plotly/Figure.scala

@@ -17,7 +17,15 @@ trait Figure {
     * }}}
     */
   def legend(newLegend: LegendOptions): Self =
-    withNewOptions(options.copy(legendOptions = newLegend))
+    withNewOptions(options.copy(legendOptions = newLegend, showLegend = Some(true)))
+
+  /** Show the legend */
+  def showLegend(): Self =
+    withNewOptions(options.copy(showLegend = Some(true)))
+
+  /** Hide the legend */
+  def hideLegend(): Self =
+    withNewOptions(options.copy(showLegend = Some(false)))
 
   /** Set figure title */
   def title(newTitle: String): Self =

src/main/scala/co/theasi/plotly/FigureOptions.scala

@@ -3,6 +3,7 @@ package co.theasi.plotly
 case class FigureOptions(
   title: Option[String],
   legendOptions: LegendOptions,
+  showLegend: Option[Boolean],
   margins: Margins,
   width: Option[Int],
   height: Option[Int],
@@ -15,6 +16,7 @@ object FigureOptions {
   def apply(): FigureOptions = FigureOptions(
     title = None,
     legendOptions = LegendOptions(),
+    showLegend = None,
     margins = Margins(),
     width = None,
     height = None,