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130 lines
3.2 KiB
Python
130 lines
3.2 KiB
Python
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"""
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Tkinter support for the Togl 2.X Tk OpenGL widget.
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Copyright (C) 2006-2007 Greg Couch
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See the LICENSE file for copyright details.
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"""
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__all__ = ['Togl', 'NORMAL', 'OVERLAY']
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import Tkinter
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import weakref, atexit
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# Overlay constants
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NORMAL = 1
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OVERLAY = 2
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class Togl(Tkinter.Widget):
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"""Tk OpenGL Widget"""
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_instances = weakref.WeakKeyDictionary()
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def __init__(self, master=None, cnf={}, **kw):
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"""Return new Togl widget"""
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if master is None:
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master = Tkinter._default_root
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master.tk.call('package', 'require', 'Togl', '2.0')
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try:
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Tkinter.Widget.__init__(self, master, "togl", cnf, kw)
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except:
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Tkinter.Widget.destroy(self)
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raise
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Togl._instances[self] = True
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def _cbsubst(self, *args):
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"""callback command argument substitution"""
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if len(args) != 1:
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return args
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return (self._nametowidget(args[0]),)
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def _options(self, cnf, kw = None):
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"""Internal function."""
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if kw:
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cnf = Tkinter._cnfmerge((cnf, kw))
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else:
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cnf = Tkinter._cnfmerge(cnf)
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res = ()
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for k, v in cnf.items():
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if v is not None:
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if k[-1] == '_': k = k[:-1]
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if callable(v):
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if k.endswith('command'):
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v = self._register(v, self._cbsubst)
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else:
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v = self._register(v)
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res = res + ('-'+k, v)
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return res
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# cget, configure are inherited
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def extensions(self):
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"""Return list of supported OpenGL extensions"""
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return self.tk.call(self._w, 'extensions')
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def postredisplay(self):
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"""Cause the displaycommand callback to be called
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the next time the event loop is idle."""
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self.tk.call(self._w, 'postredisplay')
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def render(self):
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"""Call the displaycommand callback immediately."""
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self.tk.call(self._w, 'render')
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def swapbuffers(self):
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"""If single-buffred, just flush OpenGL command buffer. If
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double-buffered, swap front and back buffers. (So this is
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appropriate to call after every frame is drawn.)"""
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self.tk.call(self._w, 'swapbuffers')
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def makecurrent(self):
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"""Make widget the current OpenGL context"""
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self.tk.call(self._w, 'makecurrent')
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def takephoto(self, imageName):
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"""Copy current contents of widget into the given photo image
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"""
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self.tk.call(self._w, 'takephoto', imageName)
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def loadbitmapfont(self, name):
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return self.tk.call(self._w, 'loadbitmapfont', name)
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def unloadbitmapfont(self, fontbase):
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self.tk.call(self._w, 'unloadbitmapfont', fontbase)
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def uselayer(self, layer):
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self.tk.call(self._w, 'uselayer', layer)
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def showoverlay(self):
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self.tk.call(self._w, 'showoverlay')
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def hideoverlay(self):
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self.tk.call(self._w, 'hideoverlay')
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def postredisplayoverlay(self):
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self.tk.call(self._w, 'postredisplayoverlay')
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def renderoverlay(self):
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self.tk.call(self._w, 'renderoverlay')
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def existsoverlay(self):
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return self.tk.call(self._w, 'existsoverlay')
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def ismappedoverlay(self):
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return self.tk.call(self._w, 'ismappedoverlay')
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def getoverlaytransparentvalue(self):
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return self.tk.call(self._w, 'getoverlaytransparentvalue')
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def destroy(self):
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del Togl._instances[self]
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Tkinter.Widget.destroy(self)
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def _cleanup():
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# destroy OpenGL contexts early, so destroycommand's don't
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# try to make any OpenGL calls during exit.
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for t in Togl._instances.keys():
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try:
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t.destroy()
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except Tkinter.TclError:
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pass
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atexit.register(_cleanup)
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