From 9145d7f24dfbeb7966f247eaeda8d44d5022af89 Mon Sep 17 00:00:00 2001
From: KIU Shueng Chuan <nixchuan@gmail.com>
Date: Thu, 14 Jan 2021 14:44:26 +0800
Subject: [PATCH] switch to usage of QOpenGLWidget

this drops support for Qt4
---
 pyqtgraph/opengl/GLViewWidget.py    | 17 ++++-------------
 pyqtgraph/widgets/RawImageWidget.py |  6 +++---
 2 files changed, 7 insertions(+), 16 deletions(-)

diff --git a/pyqtgraph/opengl/GLViewWidget.py b/pyqtgraph/opengl/GLViewWidget.py
index 3b497e0e..ca60b1cf 100644
--- a/pyqtgraph/opengl/GLViewWidget.py
+++ b/pyqtgraph/opengl/GLViewWidget.py
@@ -1,4 +1,4 @@
-from ..Qt import QtCore, QtGui, QtOpenGL, QT_LIB
+from ..Qt import QtCore, QtGui, QtWidgets, QT_LIB
 from OpenGL.GL import *
 import OpenGL.GL.framebufferobjects as glfbo
 import numpy as np
@@ -9,7 +9,7 @@ from .. import functions as fn
 
 ShareWidget = None
 
-class GLViewWidget(QtOpenGL.QGLWidget):
+class GLViewWidget(QtWidgets.QOpenGLWidget):
     
     def __init__(self, parent=None, devicePixelRatio=None, rotationMethod='euler'):
         """    
@@ -30,13 +30,7 @@ class GLViewWidget(QtOpenGL.QGLWidget):
         ================ ==============================================================
         """
 
-        global ShareWidget
-
-        if ShareWidget is None:
-            ## create a dummy widget to allow sharing objects (textures, shaders, etc) between views
-            ShareWidget = QtOpenGL.QGLWidget()
-            
-        QtOpenGL.QGLWidget.__init__(self, parent, ShareWidget)
+        QtWidgets.QOpenGLWidget.__init__(self, parent)
         
         self.setFocusPolicy(QtCore.Qt.ClickFocus)
 
@@ -132,10 +126,7 @@ class GLViewWidget(QtOpenGL.QGLWidget):
         if dpr is not None:
             return dpr
         
-        if hasattr(QtOpenGL.QGLWidget, 'devicePixelRatio'):
-            return QtOpenGL.QGLWidget.devicePixelRatio(self)
-        else:
-            return 1.0
+        return QtWidgets.QOpenGLWidget.devicePixelRatio(self)
         
     def resizeGL(self, w, h):
         pass
diff --git a/pyqtgraph/widgets/RawImageWidget.py b/pyqtgraph/widgets/RawImageWidget.py
index 819a17c3..b23ee126 100644
--- a/pyqtgraph/widgets/RawImageWidget.py
+++ b/pyqtgraph/widgets/RawImageWidget.py
@@ -8,7 +8,7 @@ Distributed under MIT/X11 license. See license.txt for more infomation.
 from ..Qt import QtCore, QtGui
 
 try:
-    from ..Qt import QtOpenGL
+    from ..Qt import QtWidgets
     from OpenGL.GL import *
 
     HAVE_OPENGL = True
@@ -74,7 +74,7 @@ class RawImageWidget(QtGui.QWidget):
 
 
 if HAVE_OPENGL:
-    class RawImageGLWidget(QtOpenGL.QGLWidget):
+    class RawImageGLWidget(QtWidgets.QOpenGLWidget):
         """
         Similar to RawImageWidget, but uses a GL widget to do all drawing.
         Perfomance varies between platforms; see examples/VideoSpeedTest for benchmarking.
@@ -83,7 +83,7 @@ if HAVE_OPENGL:
         """
 
         def __init__(self, parent=None, scaled=False):
-            QtOpenGL.QGLWidget.__init__(self, parent)
+            QtWidgets.QOpenGLWidget.__init__(self, parent)
             self.scaled = scaled
             self.image = None
             self.uploaded = False