New trunk

bzr revid: pinky-3f10ee12cea3c4c75cef44ab04ad33ef47432907

1 files changed, 49 insertions, 0 deletions

diff --git a/bin/pychart/coord.py b/bin/pychart/coord.py
new file mode 100644
index 00000000000..3c911d2a42a
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+++ b/bin/pychart/coord.py
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+#
+# Copyright (C) 2000-2005 by Yasushi Saito (yasushi.saito@gmail.com)
+# 
+# Jockey is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2, or (at your option) any
+# later version.
+#
+# Jockey is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+class T(object):
+    def get_canvas_pos(self, size, val, min, max):
+        """
+        Compute the screen location at which a sample value would be drawn.
+        ``size`` is the width or height of the chart, in points.
+        ``val`` is the sample value.
+        ``min`` and ``max`` are the minimum and maximum sample values that
+        are to be displayed over the length of ``size``.
+
+        For example, suppose the width of a chart is 200 points and the
+        minimum and maximum X values in the sample data are 100 and 150
+        respectively. When Pychart wants to draw a sample point at the X
+        value of 120, it will call
+        area.T.x_coord.get_canvas_pos(size = 200, val = 120, min = 100, max = 150).
+        """
+        raise Exception
+    
+    def get_tics(self, min, max, interval):
+        """Generate the list of places for drawing tick marks."""
+        raise Exception
+    
+    def get_min_max(self, min, max, interval):
+        """Compute the min/max values to be displayed in the chart.
+        Parameters ``min`` and ``max`` are the minimum and maximum values
+        of the sample data passed to the plots. Parameter ``interval`` is
+        the value of attribute area.T.x_grid_interval (or y_grid_interval).
+        It is None if these attributes are non-specified.
+
+        This method must return tuple (dmin, dmax, dinterval).
+        dmin should be ``min`` rounded down to some good number.
+        dmax should be ``max`` rounded up to some good number.
+        dinterval should be ``interval`` if it is non-None. Otherwise, the
+        method must compute some good value.
+        """
+        
+        raise Exception