3rd Party Software

I made a delay in the lpc code, I send 10 bytes in second, and now its ok.
Anyway thank you kuzulis and cincirin

Thank you for replies.

To install:

(Optional) Edit qwtconfig.pri to suit your specific needs. There are inline explanations of how each variable works.

Run qmake, make and make install according to commands specified in the INSTALL file. You should use Win32/MinGW I think.

To use it:

If everything went smoothly, you should be able to use Qwt now. Adding the following line into your .pro file
@
CONFIG += qwt
@
enables you to use Qwt headers and lib files. You can check out the Qwt demos to make sure. If the build is unsuccessful, it's most possibly because the feature files are not installed correctly. Look for qwt.pri, qwtconfig.pri and qwtmathml.prf, and copy them to the correct path. Some instructions on adding features can be found "here":http://doc.qt.digia.com/4.7/qmake-advanced-usage.html#adding-new-configuration-features.

If you have no previous experiences installing external Qt features, qmake's feature finding mechanism can be tedious to understand. I personally spent quite some time figuring out what went wrong during my beginning days. But it is not easy to describe the steps without access to your real environment, so you'll have to work hard yourself.

You need to switch to macx-g++ or macx-llvm makespecs. macx-xcode is broken for newest Xcode versions.

Thanks for the information!

Dear community,

I work with the "qextserialport-1.2beta2" and all work well, but I have one problem, I want to send in binary mode, ones I can set is "port->setTextModeEnabled(false);" but the serial port stil interpret the data "o" like a null terminator and so cut the string after the every "0".
my question is it possible to send by "qextserialport" binary mode, or I have to look for a another way.

thanks for the answer, :-))).

The error has nothing to do with Qt. Qt is a library, the error is coming from your compiler or linker.

You probably need something like:

@INCLUDEPATH += -I{{path_to_stk}}/include/stk
LIBS += -L{{path_to_stk}}/lib -lstk
@

in your PRO file. Substitute suitable values for {{path_to_stk}} they depend on your platform and install directories.

Thank you messi.

I have figured out how to do it now. It was a problem with stylesheet and QPalette.

Just a note, if you want to set the background color of the plot use:

@Plot->canvas()->setStyleSheet(" QwtPlotCanvas { background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #f6f7fa, stop: 1 #dadbde); }");@

Then to change the border around the plot (including the axes and such) use:
@Plot->setStyleSheet(" QwtPlot { background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #f6f7fa, stop: 1 #dadbde); }");@

Thanks again.

Hello ultrasurf,

after a lot of search and testing I finally managed to get breakpad working on all platforms. I wrote step-by-step article with examples how to do it.

"http://blog.inventic.eu/2012/08/qt-and-google-breakpad/":http://blog.inventic.eu/2012/08/qt-and-google-breakpad/

Yes it may be a problem with my setup. I am writing an application on Windows XP and Linux using Qt 4.8.1 and I am having different problems with each. The above problem with Linux and the, ‘SerialPort’ was not declared in this scope, problem with moc_serialport.cpp that was reported earlier. I have tried manually making the library as you suggested earlier and also using QtCreator with the same result.

I have also tried compiling on XP using MinGW and on Linux using MinGW with the same result. Still working on it.

I have updated the title to reflect both the wrong and the correct spelling. ust in case someone has the same problem.
Furthermore, the link in the second post has been fixed.

Have you checkout the qwt docs:
http://qwt.sourceforge.net/class_qwt_plot.html#adb0b2e68d86039f86e3240fb399fa0fe

Using canvas()->setPalette() is a more powerful way to set these colors.

or you can make a test with stylesheet technik, like:
QwtPlot::setStyleSheet(" QwtPlot {background-color: #FF0000}");

[quote author="simplePlan" date="1345041060"]I today had the same error. I fixed it by switching to release mode. Seems like I only got the libraries for the release version (using Windows 7 64 bit, Qt Designer using MSVC 2010 compiler).[/quote]

Worked for me. Thank you!

Ffmpeg would help for you.

[quote author="Lukas Geyer" date="1344578162"]Well, QtCreator is open-source and plugin-based. Feel free to start hacking on you own designer backend which allows for generating Wt code instead of Qt code.
[/quote]

How can I create a Plugin for Qt. Is there any tutorial to do that?

[quote author="Lukas Geyer" date="1344578162"]
In addition, if it is just about pushing your application to the web be aware that Qt has a "native client resp. HTML5 backend":http://www.youtube.com/watch?v=qDyWjNju1yU (but don't ask me about the maturity).[/quote]

Where can I find a tutorial for learning HTML5

qtcentre.org forum has sub-forum Qwt. It's maintained by developer of Qwt.