@annabelle As I said before, when you show us these screenshots we need to see the code file being compiled open in the main pane, so that we can see what you have written. You need to do that every time you want to ask a question about your code!

@Hronom: Did you try it with QtAudio3d? I don't want to use it, I am only interested, if it works @Thomas Zander: QML doesn't have really much opertunities as in Qt4. And if it's not easy to do it in QML, it will never work in QML, which means, that QML is a language with limits, but you can implement very fast simple widgets. That's the reason, why I prefer C++. I will learn QML, when I got time for that, but now, I only developping complex desktop applications for Linux, Windows and Mac and need their styles.

You can do it, click on the "Topic Tools" button, you have there the "Mark as solved" entry.

@bhagerty hi and welcome to devnet, What using a custom build of Qt: always use the full path to qmake. You may have the one provided by your distribution installed which will be the one invoked. One other thing you did not take into account is unless you are doing a developer build (because you want to hack on Qt) you have to call 'make install' as last step.

Yep, I will probably agree with you here. I hope this doesn't look like we are offending doforumda, because we don't.

Hi Ok super. Good work. Your first custom Widget :) Saving the points should be ok easy. you can loop the Data array and take all where isSelected is true. Ps please flag this as solved:)

Yes i have installed it and it is working fine so far, also it is very usefull too. It is a little bit slow but i don't think that this is a plugin-issue.

Thanks, Zap. Don't sweat it too much; I may not be explaining it well, but I'm almost sure it's no big deal to do.

Repeat: "A Loader won't load a Window."

@jsulm In the code, it read using ``` bool ReadModelData(istream &in, functionname &_PS) ... ... ReadModelData (fin,s) ... The path of the text file was added in the "project" > run of "Desktop Qt 5.6 MSVC2015 64 bit" > "Arguments". File path When I debug it just show in the Application output: Debugging starts Debugging has finished and when run the code the results are cpu=0 z=0 ... while they should be some non-zero.

Just ran up to "this":http://www.mobile-review.com/articles/2011/birulki-115-en.shtml news. More info about the phone they gonna use in the unexpected merge.

You can reffer to this link as an example http://doc.qt.io/qt-5/qtwidgets-widgets-calendarwidget-example.html

Of course I'll cast my -1 vote as well. I'll add to point 1: If the data contained in the model is all of basic types or implicitly shared types then it's possible to already use the current framework without ever triggering any expensive* copy , to point 2: There's no clarity on how to support different types in different roles would we need an additional template argument for each used role beyond Qt::UserRole? is so the problems above grow exponentially with the roles And to point 3: No possible implementation for a reliable dataChanged emission if model internals are exposed directly *expensive = a copy that implies more that a: memcpy of less than 65bits and an increase/decrease of a numeric reference counter

Hallo jungs und mädels, frohe Weihnachten!! Ich beschäftige mich grad mit dem modell view konzept um eins meiner Projekte zu realisieren! Ich hab euer Tutorial gefunden und wollte es durcharbeiten! Aber leider sind alle links zu den dateien und des tutorials tot. Könntet ihr das tutorial vllt wieder auffrischen? Das wäre sehr hilfreich für mich!! Liebe Grüße!!

I had the same problem, and substitute: toAScii -> toLatin1 fromAScii -> fromASCII Works fine to me too, Thanks for sharing the code.

Nothing wrong, much less "vastly inferior" with Qt containers - their performance is on par with std containers, and Qt containers use is actually less verbose and much easier to use. std containers are overly verbose, pretty much all operations require iterators. He is right about the pricing though. It needs to be cut at least in half to become reasonable.

@postmako I tested the Native_Build_of_Qt_5.4.1_on_a_Raspberry_Pi steps as pointed in your wiki. Any chances you'd have pointers to make it work with PyQt5. I have install PyQt5 (pip install python-qt5) but I am getting this: pi@raspberrypi ~ $ python Python 2.7.3 (default, Mar 18 2014, 05:13:23) [GCC 4.6.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import sys >>> from PyQt5 import QtCore, QtGui, QtWebKit Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: cannot import name QtCore No sure how to read this message. I'd guessing that it still can't find Qt5 (?)

@jsulm OK it means src_gray value in .cpp file should be same as in mainwindow::on_Track clicked() src_gray value. Actually src_gray is image array. I did it by Define the value of src_grey in function as src=imread("/file.jpg); cvtColor( src, src_gray, CV_BGR2GRAY ); so i will get src_gray value.

@AlexKrammer Good to hear and you are welcome. Its a good idea to read up on c++ as Qt uses it a lot and its best to have good understanding on some of the concepts as not to feel really uphill:)

Ich mache mal einen neuen Thread auf.

I've just tried once more resync the /usr/lib. ... and it failed immediately: 2020/02/14 12:25:34 [7746] receiving file list 2020/02/14 12:25:34 [7749] rsync: send_files failed to open "/usr/lib/cups/backend/vnc": Permission denied (13) 2020/02/14 12:25:38 [7749] sent 5,485 bytes received 1,284,984 bytes 73,741.09 bytes/sec 2020/02/14 12:25:38 [7749] total size is 3,341,241,457 speedup is 2,589.17 2020/02/14 12:25:38 [7746] rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1668) [generator=3.1.2]

@juaniyoalm Well good work then. :) Please mark as solved. You can always make new posts for new problems. and happy programming.

Sehr gut. So kommt die Absicht deutlich rüber.

@Naveen_D Well, you use them as in any C++ application. You first need to learn the API. Read documentation, take a look at the examples, try to write simple applications,...

hi, I still have a question about it. when I click on the start game button and I want the background to be the same and just a table. is it going to make some code? or over new .cpp with background?

@SGaist , sorted now....I didn't realise that the version of MariaDB had already been updated on my system, so after correcting this in the command line everything is now working. Thank you.

@jsulm sorry,but I want to know what exactly that x11.. because i understood x11 is for windowing system..(shall i ask more about x11 which you talking) but i am using the operating system: debian(linux) beagleboneboard Qtcreator(building to support beagleboneboard)...

Thank you very much !

You don't even need to modify the QT variable content based on your code. However, as @jsulm wrote, your SOURCES line is wrong. In any case it should rather be QT += core gui SOURCES += sample.cpp Casing is important.

Thanks Alex, see you soon :) I was afraid that your @kde.org address is not functional... (some ppl rarely check those)

@KroMignon said in Executing QProcess in QThread: memory leak: This is the way I would implement multiple pings in parallel: This code doesn't work. Only one iteration.

[quote author="Wolf P." date="1292095516"]Splice genes, while I have an eye on the robots ;)[/quote] You're lagging behind, Wolf. You're supposed to breed dinosaurs now. :P

Hi You can take the highlighter from here https://doc.qt.io/qt-5/qtwidgets-richtext-syntaxhighlighter-example.html (the sample is in creator already ) and instead of having the question code in a QLabel, use TextEdit as @KillerSmath says.

@hskoglund OK. I will wait that my computer will be OK to have the latest Windows 10 version. I have the 1909 and the latest is 2004. And i will wait for a new version of Qt. Or i will reinstall Windows and all my softwares, but it takes a long time. And thank you very much for your help. Best regards.

@Lengendary Thanks, this resolve the problem for me on Ubuntu 18.04 Qt 5.15.2

@SGaist @JonB @VRonin : So i took a deep breathe and tried to implement my code from scratch using @VRonin solution i.e. his latest fork https://github.com/VSRonin/qtmodelview. Now my code is working :). This was the piece of line which helped me: const QModelIndex parentIdx = index(0, 0); const QModelIndex xValueIndex = index(0, 1, parentIdx); setData(xValueIndex, 2.55); Additionally deep inside my code i had two pointers to my view which was also the cause for not showing the new values. The thread can be closed. I have a request @VRonin if he could take out the link to the code as it is a part of commercial project. Thank you everyone for your help, especially @VRonin.

@andsun this thread is 3 years old, not relevant anymore. Except of course it happens with the new forum too. It popped up in your unread, as we migrated. Everything looks new and shiny, and the system thinks everyone is logging on for the first time (which we technically are, as the login changed to Qt Account).

You're welcome ! Don't forget to update the thread's title appending solved so other forum users may know a solution has been found :)