--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tuikit/core/coords.py	Mon Mar 17 23:44:18 2014 +0100
@@ -0,0 +1,106 @@
+class Point:
+
+    """Point in cartesian space.
+
+    Implements attribute access (.x, .y) and list-like access([0],[1]).
+
+    """
+
+    def __init__(self, x=0, y=0):
+        self.x = x
+        self.y = y
+
+    def __getitem__(self, key):
+        return (self.x, self.y)[key]
+
+    def __repr__(self):
+        return 'Point(x={0.x},y={0.y})'.format(self)
+
+    def update(self, *args, **kwargs):
+        """Update point.
+
+        Accepts positional or keyword arguments:
+        - (point: Point)
+        - (x: int, y: int)
+
+        """
+        if len(args) == 2:
+            self.x, self.y = args
+        elif len(args) == 1:
+            self.x, self.y = args[0]
+        elif len(args):
+            raise ValueError('Too many args.')
+        for key, val in kwargs.items():
+            if key == 'point':
+                self.x, self.y = val
+            elif key in ('x', 'y'):
+                setattr(self, key, val)
+            else:
+                raise ValueError('Bad keyword arg: %r' % key)
+
+
+class Size:
+
+    """Size class.
+
+    Implements attribute access (.w, .h) and list-like access([0],[1]).
+
+    """
+
+    def __init__(self, *args, **kwargs):
+        self.w = 0
+        self.h = 0
+        self.update(*args, **kwargs)
+
+    def __getitem__(self, key):
+        return (self.w, self.h)[key]
+
+    def __repr__(self):
+        return 'Size(w={0.w},h={0.h})'.format(self)
+
+    def update(self, *args, **kwargs):
+        """Update size.
+
+        Accepts positional or keyword arguments:
+        - (size: Size)
+        - (w: int, h: int)
+
+        """
+        if len(args) == 2:
+            self.w, self.h = args
+        elif len(args) == 1:
+            self.w, self.h = args[0]
+        elif len(args):
+            raise ValueError('Too many args.')
+        for key, val in kwargs.items():
+            if key == 'size':
+                self.w, self.h = val
+            elif key in ('w', 'h'):
+                setattr(self, key, val)
+            else:
+                raise ValueError('Bad keyword arg: %r' % key)
+
+    def readonly(self):
+        return ReadonlySize(self)
+
+
+class ReadonlySize:
+
+    """Wrapper for Size which makes it read-only."""
+
+    def __init__(self, size):
+        self._size = size
+
+    @property
+    def w(self):
+        return self._size.w
+
+    @property
+    def h(self):
+        return self._size.h
+
+    def __getitem__(self, key):
+        return self._size[key]
+
+    def __repr__(self):
+        return 'ReadonlySize(w={0.w},h={0.h})'.format(self._size)