Add plot_title_font_family and plot_title_font_size.

Author: likema

docs/documentation/custom_styles.rst

@@ -51,6 +51,7 @@ Properties                        Description
 ``value_label_font_family``       The ``print_labels`` font family
 ``tooltip_font_family``           The tooltip font family
 ``title_font_family``             The title font family
+``plot_title_font_family``        The main title font family
 ``legend_font_family``            The legend font family
 ``no_data_font_family``           The no data text font family
 ``guide_stroke_dasharray``        The dasharray for guide line
@@ -61,6 +62,7 @@ Properties                        Description
 ``value_label_font_size``         The ``print_labels`` font size
 ``tooltip_font_size``             The tooltip font size
 ``title_font_size``               The title font size
+``plot_title_font_size``          The main title font size
 ``legend_font_size``              The legend font size
 ``no_data_font_size``             The no data font size
 ``opacity``                       The opacity of chart element

pygal/css/base.css

@@ -33,6 +33,11 @@
   font-size: {{ style.title_font_size }}px;
 }
 
+{{ id }}.plot_title {
+  font-family: {{ style.plot_title_font_family }};
+  font-size: {{ style.plot_title_font_size }}px;
+}
+
 {{ id }}.legends .legend text {
   font-family: {{ style.legend_font_family }};
   font-size: {{ style.legend_font_size }}px;

pygal/graph/graph.py

@@ -485,7 +485,7 @@ def _make_title(self):
                     'text',
                     class_='title plot_title',
                     x=self.width / 2,
-                    y=i * (self.style.title_font_size + self.spacing)
+                    y=i * (self.style.plot_title_font_size + self.spacing)
                 ).text = title_line
 
     def _make_x_title(self):

pygal/style.py

@@ -45,6 +45,7 @@ class Style(object):
     value_label_font_family = None
     tooltip_font_family = None
     title_font_family = None
+    plot_title_font_family = None
     legend_font_family = None
     no_data_font_family = None
 
@@ -54,6 +55,7 @@ class Style(object):
     value_label_font_size = 10
     tooltip_font_size = 14
     title_font_size = 16
+    plot_title_font_size = 18
     legend_font_size = 14
     no_data_font_size = 64