Add 2% margin

pygal/view.py

@@ -15,6 +15,8 @@ class Margin(object):
 
 
 class Box(object):
+    _margin = .02
+
     def __init__(self):
         self.xmin = self.ymin = 0
         self.xmax = self.ymax = 1
@@ -37,6 +39,12 @@ class Box(object):
         if not self.height:
             self.ymin -= .5
             self.ymax = self.ymin + 1
+        xmargin = self._margin * self.width
+        self.xmin -= xmargin
+        self.xmax += xmargin
+        ymargin = self._margin * self.height
+        self.ymin -= ymargin
+        self.ymax += ymargin
 
 
 class View(object):
@@ -44,6 +52,7 @@ class View(object):
         self.width = width
         self.height = height
         self.box = box
+        self.box.fix()
 
     def x(self, x):
         return self.width * (x - self.box.xmin) / float(self.box.width)