plotter: require double buffering

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9333 221aa14e-8319-0410-a670-987f0aec2ac5

diff --git a/gr-wxgui/src/python/plotter/plotter_base.py b/gr-wxgui/src/python/plotter/plotter_base.py
index 96a1869dabc00ccd141d4d46d73a8d819c91ece7..a695fce0acb66925a63b2abd6d7cbf99e538d44a 100644 (file)
--- a/gr-wxgui/src/python/plotter/plotter_base.py
+++ b/gr-wxgui/src/python/plotter/plotter_base.py
@@ -49,11 +49,14 @@ class _plotter_base(wx.glcanvas.GLCanvas):
        def __init__(self, parent):
                """!
                Create a new plotter base.
-               Initialize GL and register events.
+               Initialize the GLCanvas with double buffering.
+               Initialize various plotter flags.
+               Bind the paint and size events.
                @param parent the parent widgit
                """
                self._semaphore = threading.Semaphore(1)
-               wx.glcanvas.GLCanvas.__init__(self, parent, -1)
+               attribList = (wx.glcanvas.WX_GL_DOUBLEBUFFER, wx.glcanvas.WX_GL_RGBA)
+               wx.glcanvas.GLCanvas.__init__(self, parent, attribList=attribList)
                self.changed(False)
                self._gl_init_flag = False
                self._resized_flag = True
@@ -86,7 +89,6 @@ class _plotter_base(wx.glcanvas.GLCanvas):
                if self._resized_flag:
                        self.lock()
                        self.width, self.height = self.GetSize()
-                       glViewport(0, 0, self.width, self.height)
                        glMatrixMode(GL_PROJECTION)
                        glLoadIdentity()
                        glOrtho(0, self.width, self.height, 0, 1, 0)