Added docstrings for graphic, interval and legend modules

Author: PierreRaybaut

doc/reference/graphic.rst

@@ -0,0 +1,2 @@
+.. automodule:: qwt.graphic
+   :members:

doc/reference/index.rst

@@ -1,9 +1,12 @@
 Reference
 =========
 
-python-qwt API:
+Main `python-qwt` classes:
 
 .. toctree::
     :maxdepth: 2
 
     color_map
+    graphic
+    interval
+    legend

doc/reference/interval.rst

@@ -0,0 +1,2 @@
+.. automodule:: qwt.interval
+   :members:

doc/reference/legend.rst

@@ -0,0 +1,2 @@
+.. automodule:: qwt.legend
+   :members:

qwt/color_map.py

@@ -6,18 +6,21 @@
 # (see LICENSE file for more details)
 
 """
-qwt.color_map
--------------
-
-The `color_map` module provides the `QwtColorMap` base class and derived 
-classes.
+QwtColorMap
+-----------
 
 .. autoclass:: QwtColorMap
    :members:
 
+QwtLinearColorMap
+-----------------
+
 .. autoclass:: QwtLinearColorMap
    :members:
 
+QwtAlphaColorMap
+----------------
+
 .. autoclass:: QwtAlphaColorMap
    :members:
 """
@@ -164,7 +167,7 @@ def color(self, interval, value):
         
             Map a value into a color
             
-            :param QwtInterval interval: valid interval for value
+            :param qwt.interval.QwtInterval interval: valid interval for value
             :param float value: value
             :return: the color corresponding to value
         
@@ -189,7 +192,7 @@ def colorTable(self, interval):
         
             Build and return a color map of 256 colors
             
-            :param QwtInterval interval: range for the values
+            :param qwt.interval.QwtInterval interval: range for the values
             :return: a color table, that can be used for a `QImage`
 
         The color table is needed for rendering indexed images in combination