[PyQt] Request for __lshift__ support in QPolygonF for QPointF

[Phil Thompson]

On Tue, 19 Oct 2010 01:18:46 +0200, "Hans-Peter Jansen" <hpj at urpla.net>
wrote:
> Hi Phil,
> 
> any deeper reason, why code like this is not supported:

Laziness on my part.

> import math
> from PyQt4 import QtCore, QtGui
> 
> class StarRating(object):
>     # enum EditMode
>     Editable, ReadOnly = range(2)
>     PaintingScaleFactor = 20
> 
>     def __init__(self, starCount, maxStarCount = 5):
>         self._starCount = starCount
>         self._maxStarCount = maxStarCount
>         self.starPolygon = QtGui.QPolygonF()
>         self.starPolygon << QtCore.QPointF(1.0, 0.5)
>         for i in range(5):
>             self.starPolygon << QtCore.QPointF(0.5 + 0.5 * math.cos(0.8
*
>             i * 3.14),
>                                                0.5 + 0.5 * math.sin(0.8
*
>                                                i * 3.14))
>         self.diamondPolygon = QtGui.QPolygonF()
>         self.diamondPolygon << QtCore.QPointF(0.4, 0.5) \
>                             << QtCore.QPointF(0.5, 0.4) \
>                             << QtCore.QPointF(0.6, 0.5) \
>                             << QtCore.QPointF(0.5, 0.6) \
>                             << QtCore.QPointF(0.4, 0.5)
> 
> This would bring us on a level playing field with C++.
> 
> Here's, what has to be done right now:
> 
> import math
> from PyQt4 import QtCore, QtGui
> 
> class StarRating(object):
>     # enum EditMode
>     Editable, ReadOnly = range(2)
>     PaintingScaleFactor = 20
> 
>     def __init__(self, starCount, maxStarCount = 5):
>         self._starCount = starCount
>         self._maxStarCount = maxStarCount
>         self.starPolygon = QtGui.QPolygonF([QtCore.QPointF(1.0, 0.5)])
>         for i in range(5):
>             self.starPolygon.append(
>                 QtCore.QPointF(0.5 + 0.5 * math.cos(0.8 * i * 3.14),
>                                0.5 + 0.5 * math.sin(0.8 * i * 3.14))
>             )
> 
>         self.diamondPolygon = QtGui.QPolygonF([
>             QtCore.QPointF(0.4, 0.5), QtCore.QPointF(0.5, 0.4),
>             QtCore.QPointF(0.6, 0.5), QtCore.QPointF(0.5, 0.6),
>             QtCore.QPointF(0.4, 0.5)
>         ])
> 
> Given, that this list has to be a list, while a tuple is not accepted, 
> doesn't improve the situation, either..
> 
> As a bonus, it is expectable, that the former code executes marginally 
> quicker.

It will be in tonight's snapshot.

Phil