I have a substantial wxpython-based application that I'm trying to port from
python-2 to -3.
Almost everything is working properly, except for a few small but important
sections that use
the OGL library. That executes without any exceptions, but the objects created
within the
diagram/canvas/panel are invisible! {sometimes they are visible for a small
fraction of a
second}. This occurs on Windows-10 and on Linux(Debian) systems. The colored
background and
buttons render just fine, the buttons do what they should, but no objects
appear on the
background (again, only with Py3, Py2 works properly).
I have cut the code to a pretty minimum set and will attempt to paste it to the
bottom of
this message in the hope that it will encourage one of you to see what the
problem might be.
Alternatively if anyone knows of an example that works with Python-3 I'd be
delighted to
learn of it.
Thanks for any insights!!
# ---------------------------------------------
# togl.py test 'OGL' shape system.
from __future__ import print_function
import sys
if 2 == sys.version_info.major :
import wxversion
import wx
import random
import wx.lib.ogl as ogllib
NOMSIZE=80
WINSIZE=400
N_ITEMS=7
shapeTypes= ( 'rect', 'circle', 'rndRect' )
class ShapeGraphicWindow(ogllib.ShapeCanvas):
def __init__(self, parent):
ogllib.ShapeCanvas.__init__(self, parent)
self.diagram= ogllib.Diagram()
self.SetDiagram(self.diagram)
self.diagram.SetCanvas(self)
self.SetBackgroundColour(wx.BLUE)
def addShape(self, shape_type, title) :
if 'rect' == shape_type : # rectangle
shape= ogllib.RectangleShape(50, 35)
brush= wx.Brush(wx.TheColourDatabase.Find("RED"), wx.SOLID)
elif 'circle' == shape_type : # circle
shape= ogllib.CircleShape(65)
brush= wx.Brush(wx.TheColourDatabase.Find("YELLOW"), wx.SOLID)
elif 'rndRect' == shape_type : # rounded-rectangle
shape= ogllib.RectangleShape(45, 30)
shape.SetCornerRadius(-0.3)
brush= wx.Brush(wx.TheColourDatabase.Find("GOLDENROD"), wx.SOLID)
else :
raise AssertionError("Unable to add shape: %s :
%s",(shape_type,title))
shape.SetBrush( brush )
x= int(random.uniform(NOMSIZE,WINSIZE-NOMSIZE))
shape.SetX(x)
y= int(random.uniform(NOMSIZE,WINSIZE-NOMSIZE))
shape.SetY(y)
shape.AddText(title)
print("Draw",title,"at location ", (x,y), "on canvas of size",
self.GetSize())
shape.SetCanvas(self)
self.AddShape(shape)
self.Refresh()
shape.Show(True)
return
class TestPanel(wx.Panel):
def __init__(self, frame) :
wx.Panel.__init__(self, parent=frame)
self.objcnts= (0,N_ITEMS)
sz= wx.BoxSizer(wx.VERTICAL)
hsz= wx.BoxSizer(wx.HORIZONTAL)
btnq= wx.Button(self, -1, "Quit")
btnq.Bind(wx.EVT_BUTTON, self.Quit)
hsz.Add(btnq, 0, wx.ALL, 3)
btnq= wx.Button(self, -1, "AutoTest")
btnq.Bind(wx.EVT_BUTTON, self.AutoTest)
hsz.Add(btnq, 0, wx.ALL, 3)
sz.Add(hsz, 0, wx.ALIGN_LEFT)
self.shp_graph_win= ShapeGraphicWindow(self)
sz.Add(self.shp_graph_win, 2, wx.EXPAND)
self.SetSizer(sz)
#self.Layout()
#self.Fit()
self.SetAutoLayout(True)
def mkTitle(self, index) :
return ''.join([ chr(index + ord('A')), ":", str(index) ])
def AutoTest(self, event=None) :
for j in range(*(self.objcnts)) :
self.shp_graph_win.addShape(shapeTypes[j % len(shapeTypes)],
self.mkTitle(j))
self.objcnts= (self.objcnts[1], self.objcnts[1]+N_ITEMS)
def Quit(self, event) :
self.Destroy()
sys.exit(0)
class TestFrame(wx.Frame):
def __init__(self) :
wx.Frame.__init__(self, None, -1, "test basic OGL functionality",
size= wx.Size(WINSIZE,WINSIZE) )
TestPanel(self)
self.Show(True)
app = wx.App(False)
frame = TestFrame()
ogllib.OGLInitialize()
app.MainLoop()
sys.exit(0)
--
https://mail.python.org/mailman/listinfo/python-list
