Package: libqt5gui5
Version: 5.5.1+dfsg-10
Severity: normal
This bug appears when one embeds a QWindow inside a GTK socket container
using the functions QWindow::setParent and QWindow::fromWinId().
According to the doc, the size of the QWindow should track the size of the
container.
This used to work with Qt-5.2 and no longer works with this version of Qt.
Here are the replication instructions:
* The following python program creates a window with a gtk socket
and prints the window id of the socket
-------------------
#!/usr/bin/env python
import gtk, sys, string
class Socket:
def __init__(self):
window = gtk.Window()
window.set_default_size(200, 200)
socket = gtk.Socket()
window.add(socket)
print(socket.get_id())
window.connect("destroy", lambda w: gtk.main_quit())
socket.connect("destroy", lambda w: gtk.main_quit())
socket.connect("plug-added", self.plugged_event)
socket.connect("plug-removed", self.unplugged_event)
window.show_all()
def plugged_event(self, widget):
print "A plug has been inserted."
def unplugged_event(self, widget):
print "A plug has been removed."
return True
Socket()
gtk.main()
-------------------
* The following Qt program tries to embed itself
into the container whose id is passed on the command line.
-------------------
#include <QWidget>
#include <QWindow>
#include <QApplication>
#include <QLabel>
#include <QString>
#include <cstdio>
int main(int argc, char **argv)
{
QApplication app(argc,argv);
long wid = app.arguments().at(1).toLong(0,0);
QLabel *lbl = new QLabel();
lbl->setText("here");
lbl->setAlignment(Qt::AlignCenter);
lbl->winId();
QWindow *wlbl = lbl->windowHandle();
wlbl->setParent(QWindow::fromWinId(wid));
lbl->show();
app.exec();
}
-------------------
* To reproduce, open a terminal window, run "gtksocket.py"
and record the printed socket window id. This creates
a toplevel window containing the socket. In a second terminal window,
run "plug <socketwindowid>".
The label text "here" appears in socket window.
* Under Qt-5.2, the label text appears in the middle of
the window because the QLabel widget has the same size
as the gtksocket window. Resizing the gtksocket window
keeps the text "here" in the middle of the window because
the QLabel widget size tracks that of the socker.
* Under Qt-5.5.1+dfsg-10, the label text appears in the top left
corner of the window and stays there. Using program "xwininfo"
shows that the size of the underlying X11 window effectively
tracks the size of the gtksocket. But it appears that
the size of the QWindow and of the associated QLabel
remains stuck to its initial value.
As a consequence, XEMBED interop is broken in this version of Qt.
-- System Information:
Debian Release: stretch/sid
APT prefers testing-updates
APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 4.3.0-1-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages libqt5gui5 depends on:
ii fontconfig 2.11.0-6.3
ii libc6 2.21-4
ii libegl1-mesa [libegl1-x11] 11.0.8-1
ii libfontconfig1 2.11.0-6.3
ii libfreetype6 2.6.1-0.1
ii libgl1-mesa-glx [libgl1] 11.0.8-1
ii libglib2.0-0 2.46.2-1
ii libharfbuzz0b 1.0.1-1+b1
ii libinput10 1.1.3-1
ii libjpeg62-turbo 1:1.4.1-2
ii libmtdev1 1.1.5-1
ii libpng12-0 1.2.54-1
ii libqt5core5a [qtbase-abi-5-5-1] 5.5.1+dfsg-10
ii libqt5dbus5 5.5.1+dfsg-10
ii libqt5network5 5.5.1+dfsg-10
ii libstdc++6 5.3.1-4
ii libudev1 228-2+b1
ii libx11-6 2:1.6.3-1
ii libxkbcommon0 0.5.0-1
ii libxrender1 1:0.9.9-2
ii zlib1g 1:1.2.8.dfsg-2+b1
Versions of packages libqt5gui5 recommends:
ii libqt5svg5 5.5.1-2
ii libqt5xcbqpa5 5.5.1+dfsg-10
Versions of packages libqt5gui5 suggests:
pn libqt5libqgtk2 <none>
pn qt5-image-formats-plugins <none>
pn qtwayland5 <none>
-- no debconf information
