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Viewing changes to enthought/chaco/tools/range_selection_overlay.py

  • Committer: Bazaar Package Importer
  • Author(s): Varun Hiremath
  • Date: 2011-04-06 19:03:54 UTC
  • mfrom: (7.2.2 sid)
  • Revision ID: james.westby@ubuntu.com-20110406190354-rwd55l2ezjecfo41
Tags: 3.4.0-2
http://bugs.debian.org/621116
d/rules: fix pyshared directory path (Closes: #621116)

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enthought/chaco/tools/range_selection_overlay.py
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""" Defines the RangeSelectionOverlay class.
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"""
 
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from __future__ import with_statement
 
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# Major library imports
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from numpy import arange, array
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            upper_right[axis_ndx] = end - start
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            upper_right[1-axis_ndx] = component.bounds[1-axis_ndx]
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            gc.save_state()
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            try:
 
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            with gc:
 
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                gc.clip_to_rect(component.x, component.y, component.width, component.height)
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                gc.set_alpha(self.alpha)
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                gc.set_fill_color(self.fill_color_)
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                gc.set_stroke_color(self.border_color_)
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                gc.rect(lower_left[0], lower_left[1], 
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                        upper_right[0], upper_right[1])
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                gc.draw_path()
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            finally:
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                gc.restore_state()
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    #------------------------------------------------------------------------
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    # Private methods
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        """ Returns a tuple of (x1, x2) screen space coordinates of the start
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        and end selection points.  
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        If there is no current selection, then returns None.
 
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        If there is no current selection, then returns an empty list.
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        """
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        ds = getattr(self.plot, self.axis)
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        selection = ds.metadata[self.metadata_name]
 
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        selection = ds.metadata.get(self.metadata_name, None)
 
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        if selection is None:
 
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            return []
 
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        # "selections" metadata must be a tuple
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        if self.metadata_name == "selections":
 
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        if self.metadata_name == "selections" or \
 
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                (selection is not None and isinstance(selection, tuple)):
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            if selection is not None and len(selection) == 2:
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                return [self.mapper.map_screen(array(selection))]
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            else: