Ticket #28: interval.diff

src/chart.py

@@ -238 +239 @@
                 if 0.0 <= pos <= 1.0:
                     self.yticks.append((pos, label))
 
+        elif self.options.axis.y.interval > 0:
+            interval = self.options.axis.y.interval
+            label = (divmod(self.minyval, interval)[0] + 1) * interval
+            pos = 1.0 - (self.yscale * (label - self.minyval))
+            while 0.0 <= pos <= 1.0:
+                self.yticks.append((pos, label))
+                label += interval
+                pos = 1.0 - (self.yscale * (label - self.minyval))
+
         elif self.options.axis.y.tickCount > 0:
             prec = self.options.axis.y.tickPrecision
             num = self.yrange / self.options.axis.y.tickCount
@@ -577 +622 @@
             range=None,
             rotate=None,
             label=None,
+            padding=0,
         ),
         y=Option(
             hide=False,
             ticks=None,
             tickCount=10,
             tickPrecision=1,
+            interval=0,
             range=None,
             rotate=None,
             label=None,
+            padding=0,
         ),
     ),
     background=Option(