General and Desktop

@erico In addition to the preceding comments. I am not a SQLite user, so I may be mistaken about the following, it;s just for you to check. But even if your query "works" i am trying to retrieve data which was added on the current day Does your table only contain dates in the current month? Else I don't see how your code won't amalgamate rows with the same day but on different months? fetchone(): Why do you thing this would return something on "the current day" (I take that to mean "today", maybe that's not what you mean)? You might want to play with your proposed query in one of the available "SQLite Workbench"-type applications, so that you can be sure it behaves as you intend before involving any Qt issues.

@Christian-Ehrlicher said in Pure virtual function called!: don't call the thread in the ctor since then the derived class is not yet instantiated As @Christian-Ehrlicher said, you are calling the overrided method into constructor of the base class. Think on that when you create an object of the derived class, first the base part is initialized and finally the derived part, so the overrided method is not initialized yet.

Hi -For the buttons, it is not applied. What is the reason for this and what is the potential solution? Hi, the labels are transparent (no background color) so you see your custom widget through them. Buttons do have a background normally. You could use ToolButtons and set auto raise [image: nuNuwL.png] which allows seeing through the button.

@Qingshui-Kong said in I hope QCalendarWidget only show months.: I just want to get the month Why do you then need QCalendarWidget at all? There are only 12 months, simply use a combo box or list widget.

@Christian-Ehrlicher Thank you for your response. i will check it

Here I have a minimal example to produce the problem. QDialog *dlg; void MainWindow::on_pushButton_clicked() { dlg=new QDialog; dlg->setWindowState(Qt::WindowFullScreen); dlg->show(); } Different beheavour

Thx, I reformatted the code, the CMakeLists.txt is not needed.

@AshishDev said in Are Qt Open Source and Qt Commercial different.: They take the code from the open source branch and sell it with a commercial license. They don't "take code from the open source branch". They make the code available under multiple licenses (GPL or LGPL or Commercial). Users can choose which license they want to use. Different licenses come with different freedoms and obligations: If you choose the GPL license, then one of your obligations is to license your own software under the GPL. If you choose the commercial license, then one of your obligations is to pay the Qt Company. Is it not a violation of the GPL license? I don't see any violations here.

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@user4592357 said in remove timer single shot delay after a condition is met: so how can i make sure the child process does its initialisation inside the first slot, and not after it has finished You can't. You have no control over, or knowledge of, what the child is doing in the way of initialisation or otherwise. Quite apart from, you don't even know how the OS is scheduling time between your process and another process. i.e. only have singleShot delay if app was first time loaded, next times i don't wanna have delay To answer just that: just keep a bool variable to tell you whether it's first time or not, and don't do delay if you say you don't want it after first time.

Can you show how you do that ? Did you try starting your application with the QT_DEBUG_PLUGINS environment variable set to 1 ?

Very, very interesting. Never knew about that QMAKE_SUBSTITUTES. In my project file: GIT_VERSION = $$system(git --git-dir="C:/wifibutton"/.git --work-tree="C:/wifibutton" describe --always --tags) win32 { // this is to remove characters that could prevent compilation. GIT_VERSION ~= s/-\d+-g[a-f0-9]{6,} } QMAKE_SUBSTITUTES += config.h.in and config.h.in: #ifndef CONFIG_H_IN #define CONFIG_H_IN #define APP_VERSION '"$$GIT_VERSION"' #endif // CONFIG_H_IN and in my source code: QString version(APP_VERSION); // etc. Thanks!

@Helg1980 said in How do I delete the current QTreeWidget element correctly?: QCssParser::parseColorValue: Specified color without alpha value but alpha given: 'rgb 27, 29, 35, 0' You have a css somewhere which defines a wrong color rgb value.

@A-Newbie said in QFile, QThread, QConcurrent and how to Qt: Regardless, I got answers pretty much to all of my questions and everyone helped a lot. great 👍 Is there a way to simply have this topic as solved without picking a specific answer? sure bottem right side, topic tools button, simply set it to solved there

@mganesh Please read through https://doc.qt.io/qt-5/signalsandslots.html, looking at the examples. Please move away from SIGNAL/SLOT() macros, which are very old, and use the "new" syntax described there.

@Merlino Try to start it with strace: strace ./YOUR_APP You can post its output here. It can give some hints.

It looks like "model" is a C++ object, but I cannot trace where it is added or exposed to QML. If anyone can tell me how I can trace this ?

@Bonnie It was the reason. Thank you very much!