fontsize options

closes #181 (closed)

• Implement option Base Font Size in Menu Options that allows user to select a base font size for texts in plotting.
• For font size from 9 to 12, plot's label will be split into 2 lines if the plot has no additional info.
• Plot height and figure height will be spread out according to selected font size.

sohstationviewer/conf/config_processor.py

@@ -49,6 +49,7 @@ to_date = {QtCore.QDate.currentDate().toString("yyyy-MM-dd")}
 mp_color_mode = regular
 tps_color_mode = High
 date_mode = YYYY-MM-DD
+base_plot_font_size = 6
 add_mass_pos_to_soh = False
 '''
 
@@ -74,6 +75,7 @@ class ConfigProcessor:
             'all_soh',
             'from_date', 'to_date',
             'mp_color_mode', 'tps_color_mode', 'date_mode',
+            'base_plot_font_size',
                 'add_mass_pos_to_soh'  # noqa: E131
         }
 
@@ -182,6 +184,19 @@ class ConfigProcessor:
                                  f'values: '
                                  f'{",  ".join(expected_date_modes)}.')
 
+        base_plot_font_size = self.config.get(
+            'MiscOptions', 'base_plot_font_size')
+        expected_base_plot_font_sizes = [
+            str(i)
+            for i in range(constants.MIN_FONTSIZE, constants.MAX_FONTSIZE + 1)
+        ]
+
+        if base_plot_font_size not in expected_base_plot_font_sizes:
+            raise BadConfigError(
+                f'Font size can only have one of these '
+                f'values: '
+                f'{",  ".join(expected_base_plot_font_sizes)}.')
+
     def apply_config(self, window: MainWindow) -> None:
         """
         Apply the loaded config to a window.
@@ -263,6 +278,11 @@ class ConfigProcessor:
         elif date_mode == 'YYYY:DOY':
             window.yyyy_doy_action.trigger()
 
+        base_plot_font_size = window.config.get(
+            'MiscOptions', 'base_plot_font_size')
+        window.base_plot_font_size_action_dict[
+            int(base_plot_font_size)].trigger()
+
         window.add_masspos_to_rt130_soh.setChecked(
             get_bool('MiscOptions', 'add_mass_pos_to_soh')
         )