56 lines
1.4 KiB
Python
56 lines
1.4 KiB
Python
#
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# Python GUI - Canvas Paths - Generic
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#
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class CanvasPaths:
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# Mixin class providing generic implementations of
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# canvas path construction operators.
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def __init__(self):
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self.newpath()
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def newpath(self):
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self._path = []
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self._current_subpath = None
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self._current_point = (0, 0)
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def moveto(self, x, y):
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self._current_subpath = None
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self._current_point = self._coords(x, y)
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def rmoveto(self, dx, dy):
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x, y = self._current_point
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self.moveto(x + dx, y + dy)
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def lineto(self, x, y):
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subpath = self._current_subpath
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if subpath is None:
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subpath = [self._current_point]
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self._path.append(subpath)
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self._current_subpath = subpath
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p = self._coords(x, y)
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subpath.append(p)
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self._current_point = p
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def rlineto(self, dx, dy):
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x, y = self._current_point
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self.lineto(x + dx, y + dy)
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def closepath(self):
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subpath = self._current_subpath
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if subpath:
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subpath.append(subpath[0])
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self._current_subpath = None
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def get_current_point(self):
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return self._current_point
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# Implementations may set _coords to one of the following
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def _int_coords(self, x, y):
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return int(round(x)), int(round(y))
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def _float_coords(self, x, y):
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return x, y
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