[Interest] QPushButton shortcut works on Qt 4 but not 5

[Elvis Stansvik]

2016-05-07 16:56 GMT+02:00 Mark Gaiser <markg85 at gmail.com>:
> On Sat, May 7, 2016 at 3:44 PM, Elvis Stansvik <elvstone at gmail.com> wrote:
>>
>> 2016-05-07 15:27 GMT+02:00 Elvis Stansvik <elvstone at gmail.com>:
>> > Hi all,
>> >
>> > Maybe I'm doing something completely wrong, but on Qt 4.8.7, this
>> > works (pressing Ctrl+O prints "clicked"):
>> >
>> > test.cpp:
>> >
>> > #include <QApplication>
>> > #include <QMainWindow>
>> > #include <QPushButton>
>> > #include <QWidget>
>> > #include <QDebug>
>> >
>> > class MainWindow : public QMainWindow {
>> >     Q_OBJECT
>> >
>> > public:
>> >     MainWindow(QWidget *parent = 0) : QMainWindow(parent) {
>> >         QPushButton *button = new QPushButton("Click Me (Ctrl+O)");
>> >         button->setShortcut(QString("Ctrl+O"));
>> >         connect(button, SIGNAL(clicked()), this, SLOT(onClicked()));
>> >
>> >         setCentralWidget(button);
>> >     }
>> >
>> > public slots:
>> >     void onClicked() {
>> >         qDebug() << "clicked";
>> >     }
>> > };
>> >
>> > int main(int argc, char *argv[]) {
>> >     QApplication app(argc, argv);
>> >
>> >     MainWindow window;
>> >     window.show();
>> >
>> >     return app.exec();
>> > }
>> >
>> > #include "moc_test.cpp"
>> >
>> > but on Qt 5.6.0 it does not (nothing printed on Ctrl+O).
>>
>> I just tested on a couple of other machines (Qt 5.2.1 and Qt 5.5.1),
>> and it worked on both of them. So something broke in Qt 5.6.0? Or Arch
>> somehow broke my Qt?
>>
>> If anyone else is under KDE on Arch and could give it a try, I would
>> much appreciate it.
>>
> can you try to rule out plasma and it's default key bindings. There might
> very well be a Ctrl+O global key binding in there.
>
> Install openbox on your system en logon (via sddm) in an openbox session.
> Then try your app and see if it works.
>
> If that does work then plasma is probably taking that global shortcut. If it
> doesn't then the issue is quite a bit deeper.

Ah, good idea. I can confirm that it works under Openbox.

So now the question is why Plasma (KWin?) seems to swallow a lot of shortcuts.

Looking at System Settings -> Shortcuts I can confirm that Ctrl+O is
bound to "Open..." under Standard Shortcuts. But I don't understand
why something like that is done by Plasma, isn't that an application
thing?

I also can't get Qt::Key_F2 to work with the above example (it was
actually the function keys I was mostly interested in), and that is
not bound to anything under System Settings -> Shortcuts.

Anyway, I guess it's not a Qt issue, so sorry for being off-topic. But
if anyone knows what might be going on I'm idle ears.

Elvis

>
>
>>
>> Elvis
>>
>> >
>> > test.pro for building:
>> >
>> > TEMPLATE = app
>> > greaterThan(QT_MAJOR_VERSION, 4):QT += widgets
>> > TARGET = test
>> > INCLUDEPATH += .
>> >
>> > # Input
>> > SOURCES += test.cpp
>> > HEADERS += test.cpp
>> >
>> > Any ideas what may be going wrong? My window manager (KWin) is not
>> > intercepting Ctrl+O (obviously). And besides, it doesn't seem to
>> > matter which shortcut I use.
>> >
>> > Thanks in advance,
>> > Elvis
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>