Changed default increase and decrease to one and updated tool tip.

- Added constant for increase and decrease step in font size
- Updated up and down arrow buttons tool tip

src/mslice/plotting/plot_window/cut_plot.py

@@ -29,6 +29,7 @@
 
 DEFAULT_LABEL_SIZE = 10
 DEFAULT_TITLE_SIZE = 12
+DEFAULT_FONT_SIZE_STEP = 1
 
 
 def get_min(data, absolute_minimum=-np.inf):
@@ -852,8 +853,8 @@ def all_fonts_size(self, values: dict):
 
     def increase_all_fonts(self):
         for p in self.plot_fonts_properties:
-            setattr(self, p, getattr(self, p) + 0.5)
+            setattr(self, p, getattr(self, p) + DEFAULT_FONT_SIZE_STEP)
 
     def decrease_all_fonts(self):
         for p in self.plot_fonts_properties:
-            setattr(self, p, getattr(self, p) - 0.5)
+            setattr(self, p, getattr(self, p) - DEFAULT_FONT_SIZE_STEP)

src/mslice/plotting/plot_window/slice_plot.py

@@ -27,6 +27,7 @@
 
 DEFAULT_LABEL_SIZE = 10
 DEFAULT_TITLE_SIZE = 12
+DEFAULT_FONT_SIZE_STEP = 1
 
 
 class SlicePlot(IPlot):
@@ -650,8 +651,8 @@ def all_fonts_size(self, values: dict):
 
     def increase_all_fonts(self):
         for p in self.plot_fonts_properties:
-            setattr(self, p, getattr(self, p) + 0.5)
+            setattr(self, p, getattr(self, p) + DEFAULT_FONT_SIZE_STEP)
 
     def decrease_all_fonts(self):
         for p in self.plot_fonts_properties:
-            setattr(self, p, getattr(self, p) - 0.5)
+            setattr(self, p, getattr(self, p) - DEFAULT_FONT_SIZE_STEP)

src/mslice/presenters/plot_options_presenter.py

@@ -49,8 +49,8 @@ def _set_all_plot_fonts(self):
     def _set_font_sizes_tooltip(self):
         tip = self._convert_font_config_to_tooltip()
         self._view.allFntSz.setToolTip(tip)
-        self._view.sclUpFntSz.setToolTip(tip)
-        self._view.sclDownFntSz.setToolTip(tip)
+        self._view.sclUpFntSz.setToolTip("Increase font sizes\n\n" + tip)
+        self._view.sclDownFntSz.setToolTip("Decrease font sizes\n\n" + tip)
 
     def _convert_font_config_to_tooltip(self):
         font_size_dict = self._model.all_fonts_size.copy()