<div dir="ltr">Most definitely related to bug <a href="https://bugreports.qt.io/browse/QTBUG-33479">https://bugreports.qt.io/browse/QTBUG-33479</a>. The status says the issue was closed and fixed in Qt 5.3.0 RC1, but I guess it has reappeared. Sample (Python) code below.<div><br></div><div><p style="margin:0px;font-size:14px;font-family:Monaco"><span style="color:rgb(4,51,255)">from</span> <span style="text-decoration:underline">PyQt5.QtWidgets </span><span style="text-decoration:underline;color:rgb(4,51,255)">import</span><span style="text-decoration:underline"> *</span></p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"><br></p>
<p style="margin:0px;font-size:14px;font-family:Monaco"><span style="color:rgb(4,51,255)">if</span> __name__ == <span style="color:rgb(0,180,0)">'__main__'</span>:</p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> <span style="color:rgb(4,51,255)">import</span> sys </p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> app = QApplication(sys.argv)</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"> </p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> mainWindow = QMainWindow() </p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> splitter = QSplitter()</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"> </p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> widget1 = QWidget()</p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> widget1.setStyleSheet(<span style="color:rgb(0,180,0)">'background-color: Blue'</span>)</p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> widget2 = QWidget()</p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> widget2.setStyleSheet(<span style="color:rgb(0,180,0)">'background-color: Black'</span>)</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"> </p>
<p style="margin:0px;font-size:14px;font-family:Monaco;color:rgb(203,203,203)"><span style="color:rgb(0,0,0)"> </span># removing the next line will fix the issue!</p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> winId = widget1.winId()</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"> </p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> splitter.addWidget(widget1)</p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> splitter.addWidget(widget2)</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"> </p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> mainWindow.setCentralWidget(splitter)</p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> mainWindow.show()</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"> </p>
<p style="margin:0px;font-size:14px;font-family:Monaco"> app.<span style="color:rgb(4,51,255)">exec</span>()</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;min-height:19px"> </p>
<p style="margin:0px;font-size:14px;font-family:Monaco;color:rgb(203,203,203)"># Using <span style="text-decoration:underline">Macports</span> <span style="text-decoration:underline">Mavericks</span> (10.9.5):</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;color:rgb(203,203,203)"># python3.4 @3.4.3_5</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;color:rgb(203,203,203)"># qt5-<span style="text-decoration:underline">mac</span> @5.4.2_1</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;color:rgb(203,203,203)"># py34-sip @4.16.9_0</p>
<p style="margin:0px;font-size:14px;font-family:Monaco;color:rgb(203,203,203)"># py34-pyqt5 @5.5_0</p></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Sep 20, 2015 at 10:21 AM, Rembrand (daxLAB Limitted) <span dir="ltr"><<a href="mailto:rembrand@daxlab.com" target="_blank">rembrand@daxlab.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
<div>If it was the GIL then your app would not respond at all if clicking on or hovering over a button for example. I have not come across this issue and have more or less the same setup (using VLC python bindings) with the difference I use Qt5.5 with python 2.7 on Mac OS Yoshmite. </div><div><br></div><div>I can resize my tab widgets using a vertical splitter while playing a movie. HOWEVER I did on Fedora 20 KDE Linux come across such an issue (among others) when using QtMultimedia combined with QWebEngine in the same app...... which was for me the reason to stay with VLC python bindings. </div><div><br></div><div><br></div><div><div style="font-size:9px">Best regards,</div><div style="font-size:9px">Rembrand</div><div style="font-size:9px"><br></div><div style="font-size:9px">Cell phone: +31 646.224.526</div><div style="font-size:9px">Email: <a href="mailto:rembrand@daxlab.com" target="_blank">rembrand@daxlab.com</a></div><div style="font-size:9px">Sent from my smart phone.</div></div></div></blockquote><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div> 3. porting PyQt4 to PyQt5 on OSX - cursor icon not changing over<br> QSplitter (Timothy Grove)<br>------------------------------<br><br>Message: 3<br>Date: Sat, 19 Sep 2015 09:23:16 +0100<br>From: Timothy Grove <<a href="mailto:tim_grove@sil.org" target="_blank">tim_grove@sil.org</a>><br>To: PyQT mailing list <<a href="mailto:PyQt@riverbankcomputing.com" target="_blank">PyQt@riverbankcomputing.com</a>><br>Subject: [PyQt] porting PyQt4 to PyQt5 on OSX - cursor icon not<br> changing over QSplitter<br>Message-ID:<br> <<a href="mailto:CAJbHV24%2BsTT1iL3-B6-oiuY40CiaURh6-Rpxq%2BZ6smABOgALWQ@mail.gmail.com" target="_blank">CAJbHV24+sTT1iL3-B6-oiuY40CiaURh6-Rpxq+Z6smABOgALWQ@mail.gmail.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>I'm porting an application from PyQt4 to PyQt5 on Mac OSX (Mavericks).<br>Generally a good experience, but I'm seeing a few strange behaviours that I<br>haven't been able to work around; possibly due to accessing the window id<br>of the widget in my video player, or possibly a GIL release issue?<br><br>*1. The cursor doesn't change when moved over a splitter handle. *This<br>"might" be related to a "closed' issue where a widget's window id was<br>accessed with the widget in a QSplitter [<br><a href="https://bugreports.qt.io/browse/QTBUG-33479" target="_blank">https://bugreports.qt.io/browse/QTBUG-33479</a>], but might it also be related<br>to not releasing the GIL? I'm using the python bindings for VLC [<br><a href="https://wiki.videolan.org/Python_bindings" target="_blank">https://wiki.videolan.org/Python_bindings</a>] which uses the window id to make<br>the link between VLC and a widget for video display; in my case, a QLabel.<br>I've also tried replacing VLC use with QVideoWidget from<br>PyQt5.QtMultimediaWidgets, but with similar results. Before a video is<br>loaded I can see the expected change in cursor icon over the splitter<br>handle, but once a video has loaded - no change.<br><br>Using Macports Mavericks (10.9.5):<br>python3.4 @3.4.3_5<br>qt5-mac @5.4.2_1<br>py34-sip @4.16.9_0<br>py34-pyqt5 @5.5_0<br><br>Best regards,<br>Timothy Grove</div></blockquote></div></div></div>