Hi,
On 23.07.07, Andre Wobst wrote:
> the enclosed code should work well on PyX 0.9 too ...
(if I only had attached it)
André
--
by _ _ _ Dr. André Wobst
/ \ \ / ) [EMAIL PROTECTED], http://www.wobsta.de/
/ _ \ \/\/ / PyX - High quality PostScript and PDF figures
(_/ \_)_/\_/ with Python & TeX: visit http://pyx.sourceforge.net/
class impulses(_styleneedingpointpos):
needsdata = ["vpos", "vposmissing", "vposavailable", "vposvalid",
"poscolumnnames"]
changelinestyle = attr.changelist([style.linestyle.solid,
style.linestyle.dashed,
style.linestyle.dotted,
style.linestyle.dashdotted])
defaultlineattrs = [changelinestyle]
defaultfrompathattrs = []
def __init__(self, lineattrs=[], fromvalue=0, frompathattrs=[],
valueaxisindex=1):
self.lineattrs = lineattrs
self.fromvalue = fromvalue
self.frompathattrs = frompathattrs
self.valueaxisindex = valueaxisindex
def selectstyle(self, privatedata, sharedata, graph, selectindex,
selecttotal):
privatedata.insertfrompath = selectindex == 0
if self.lineattrs is not None:
privatedata.lineattrs = attr.selectattrs(self.defaultlineattrs +
self.lineattrs, selectindex, selecttotal)
else:
privatedata.lineattrs = None
def adjustaxis(self, privatedata, sharedata, graph, columnname, data):
if self.fromvalue is not None:
try:
i = sharedata.poscolumnnames.index(columnname)
except ValueError:
pass
else:
if i == self.valueaxisindex:
graph.axes[sharedata.poscolumnnames[i]].adjustaxis([self.fromvalue])
def initdrawpoints(self, privatedata, sharedata, graph):
privatedata.impulsescanvas = canvas.canvas()
if self.fromvalue is not None:
valueaxisname = sharedata.poscolumnnames[self.valueaxisindex]
privatedata.vfromvalue =
graph.axes[valueaxisname].convert(self.fromvalue)
privatedata.vfromvaluecut = 0
if privatedata.vfromvalue < 0:
privatedata.vfromvalue = 0
if privatedata.vfromvalue > 1:
privatedata.vfromvalue = 1
if self.frompathattrs is not None and privatedata.insertfrompath:
graph.stroke(graph.axes[valueaxisname].vgridpath(privatedata.vfromvalue),
self.defaultfrompathattrs + self.frompathattrs)
else:
privatedata.vfromvalue = 0
def drawpoint(self, privatedata, sharedata, graph, point):
if sharedata.vposvalid and privatedata.lineattrs is not None:
vpos = sharedata.vpos[:]
vpos[self.valueaxisindex] = privatedata.vfromvalue
privatedata.impulsescanvas.stroke(graph.vgeodesic(*(vpos +
sharedata.vpos)), privatedata.lineattrs)
def donedrawpoints(self, privatedata, sharedata, graph):
graph.insert(privatedata.impulsescanvas)
def key_pt(self, privatedata, sharedata, graph, x_pt, y_pt, width_pt,
height_pt):
if privatedata.lineattrs is not None:
graph.stroke(path.line_pt(x_pt, y_pt+0.5*height_pt, x_pt+width_pt,
y_pt+0.5*height_pt), privatedata.lineattrs)
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