Calibration Plot: Customizable labels

Orange/widgets/evaluate/owcalibrationplot.py

@@ -1,4 +1,4 @@
-from collections import namedtuple
+from collections import namedtuple, OrderedDict
 
 import numpy as np
 
@@ -17,6 +17,8 @@
 from Orange.widgets.evaluate.utils import results_for_preview
 from Orange.widgets.utils import colorpalettes
 from Orange.widgets.utils.widgetpreview import WidgetPreview
+from Orange.widgets.visualize.utils.customizableplot import BaseSetter, \
+    AxisFontUpdater, Customizable
 from Orange.widgets.widget import Input, Output, Msg
 from Orange.widgets import report
 
@@ -58,13 +60,47 @@
 )]
 
 
+# Axis part
+class AxisFontUpdater(AxisFontUpdater):
+    @property
+    def axis_items(self):
+        return [value["item"] for value in self.parent.axes.values()]
+
+
+# Labels box
+class FontSetter(BaseSetter, AxisFontUpdater):
+    def __init__(self, parent):
+        super().__init__(parent)
+        self.setter = {
+            self.FONT_FAMILY_LABEL: self._update_font_family,
+            self.AXIS_TITLE: self._update_axes_titles_font,
+            self.AXIS_TICKS: self._update_axes_ticks_font,
+        }
+
+
+# Customizable plot item
+class PlotItem(pg.PlotItem, Customizable):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self.setters = {self.BOXES[0]: FontSetter(self)}
+
+
 class OWCalibrationPlot(widget.OWWidget):
     name = "Calibration Plot"
     description = "Calibration plot based on evaluation of classifiers."
     icon = "icons/CalibrationPlot.svg"
     priority = 1030
     keywords = []
 
+    initial_visual_settings = OrderedDict({
+        PlotItem.BOXES[0]:
+            OrderedDict({name: values for name, values in (
+                (FontSetter.FONT_FAMILY_LABEL, FontSetter.FONT_FAMILY_SETTING),
+                (FontSetter.AXIS_TITLE, FontSetter.SETTING),
+                (FontSetter.AXIS_TICKS, {FontSetter.IS_ITALIC_LABEL: (None, False)}),
+            )})
+    })
+
     class Inputs:
         evaluation_results = Input("Evaluation Results", Results)
 
@@ -157,7 +193,7 @@ def __init__(self):
         gui.auto_apply(self.controlArea, self, "auto_commit", commit=self.apply)
 
         self.plotview = pg.GraphicsView(background="w")
-        self.plot = pg.PlotItem(enableMenu=False)
+        self.plot = PlotItem(enableMenu=False)
         self.plot.setMouseEnabled(False, False)
         self.plot.hideButtons()
 
@@ -498,6 +534,9 @@ def send_report(self):
         if self.score != 0:
             self.report_raw(self.get_info_text(short=False))
 
+    def set_visual_settings(self, *args):
+        self.plot.set_parameter(*args)
+
 
 def gaussian_smoother(x, y, sigma=1.0):
     x = np.asarray(x)