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#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# some parts copyright 2002 by Space Telescope Science Institute
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#------------------------------------------------------------------------------
""" The WX OpenGL backend.
This backend only uses OpenGL to get a device to draw onto. AGG is used for
the actual drawing.
"""
__all__ = ["GraphicsContext", "Canvas", "CanvasWindow"]
import time
import sys
import wx
if float(wx.__version__[:3]) >= 2.5:
from wxPython import wx as oldwx
from wx import glcanvas
else:
oldwx = wx
# ??? - Let's hope and pray this works. Utterly untested.
glcanvas = wx.glcanvas
from backend_image import GraphicsContextSystem as GraphicsContext
from agg import plat_support, CompiledPath
from backend_wx import BaseWxCanvas
def font_metrics_provider():
""" Create an object to be used for querying font metrics.
"""
return GraphicsContext((1, 1))
class Canvas(BaseWxCanvas, glcanvas.GLCanvas):
"A Canvas that uses the Wx GLCanvas"
def __init__(self, parent, id = -1, size = wx.DefaultSize):
glcanvas.GLCanvas.__init__(self, parent, id, wx.Point(0, 0), size,
wx.SUNKEN_BORDER | wx.WANTS_CHARS | \
wx.FULL_REPAINT_ON_RESIZE )
super(Canvas, self).__init__()
def _create_kiva_gc(self, size):
return GraphicsContext(size)
def blit(self, event):
t1 = time.time()
wdc = wx.PaintDC(self)
self.gc.pixel_map.draw_to_glcanvas(0, 0)
self.SwapBuffers()
t2 = time.time()
self.blit_time = t2-t1
self.dirty = False
return
def OnSize(self,event):
# resize buffer bitmap and repaint.
sz = self.GetClientSizeTuple()
if (sz != (self.gc.width(),self.gc.height()) and self.GetContext()):
self.SetCurrent()
plat_support.resize_gl(*sz)
self.new_gc(sz)
event.Skip()
return
def OnPaint(self,event):
self.SetCurrent()
self.paint(event)
return
def Refresh(self):
self.paint(None)
glcanvas.GLCanvas.Refresh(self)
return
class _CanvasWindow(wx.Frame):
def __init__(self, id=-1, title='Kiva Canvas',size=(600,800),
canvas_class=Canvas):
parent = oldwx.NULL
wx.Frame.__init__(self, parent,id,title, size=size)
self.canvas = canvas_class(self)
self.Show(1)
return
CanvasWindow = _CanvasWindow
try:
from numpy import which
if which[0]!='numpy':
import gui_thread
CanvasWindow = gui_thread.register(_CanvasWindow)
except ImportError:
pass
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