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nupul
3rd May 2006, 18:31
I have a few buttons in my app, which when clicked, launch a particular application, using QProcess.
Now what I want to do is this, till the external application hasn't started, I wish the Hourglass cursor to
be displayed. Once the application starts, reset the cursor to the original state. I tried several combinations
to the following code snippet, but can't seem to figure it out though...help ;)




QProcess launch_prog;

launch_prog.startDetached(path);

if(launch_prog.waitForStarted())
setCursor(Qt::WaitCursor); //my widget inherits QWidget

if(launch_prog.state()==QProcess::Running);
unsetCursor();


Thanks

Nupul
jpn
3rd May 2006, 19:14
QProcess::startDetached() (http://doc.trolltech.com/4.1/qprocess.html#startDetached-2) is a static method. It returns true on success and false otherwise, and that's about all you will know about the launched process.

Instantiate a QProcess and handle it by non-static members instead, if you want to know more about it's state or so.
Chicken Blood Machine
3rd May 2006, 19:19
QApplication::setOverrideCursor(Qt::BusyCursor);
QProcess launch_prog;
launch_prog.start(path);
QApplication::restoreOverrideCursor();
nupul
3rd May 2006, 19:20
already done that...in fact i get a warning msg displaying object destroyed while process is still running...and thus chose startDetached(...)

Maybe you could stick a few lines of code (or pseudo ;) )to explain what i should do!

Thanks

Nupul
nupul
4th May 2006, 13:31
CBM, I even did as you said...actually I saw your reply later and edited my post ;)

This is what I did


QApplication::setOverrideCursor(Qt::WaitCursor);
locate.waitForFinished(-1);
QApplication::restoreOverrideCursor();



And this is the error I got:



mylayout.cpp: In member function ‘void MyMenuLayout::search()’:
mylayout.cpp:488: error: incomplete type ‘QApplication’ used in nested name specifier
mylayout.cpp:490: error: incomplete type ‘QApplication’ used in nested name specifier
make: *** [mylayout.o] Error 1


infact I don't even know what it means :confused:

I went through the docs, and the exact same thing is done in one of the examples: A text editor.

What is wrong?

Thanks

Nupul

PS: i am executing the above on linux....if that's got something to do with this
:p
jpn
4th May 2006, 13:33
#include <QApplication>
nupul
4th May 2006, 13:37
That was the first thing to cross my mind...did that too...but it still wouldn't work!!:eek:
Chicken Blood Machine
4th May 2006, 16:57
already done that...in fact i get a warning msg displaying object destroyed while process is still running...and thus chose startDetached(...)

Maybe you could stick a few lines of code (or pseudo ;) )to explain what i should do!

Thanks

Nupul

Oops, that should be:


QApplication::setOverrideCursor(Qt::BusyCursor);
QProcess* launch_prog = new QProcess(this);
connect(launch_prog,
SIGNAL(finished(int, QProcess::ExitStatus) ),
launch_prog,
SLOT(deleteLater()));
launch_prog->start(path);
QApplication::restoreOverrideCursor();