qt5 | Qt5 super module

I'm trying to create a project in Qt with an QOpenGLWidget and CMake as a building tool. The problem is that it does not compile and I don't know why.

I'm trying to solve an issue in a Qt5 application that's caused by a touchscreen driver I wrote a couple years ago. The problem being that my touchscreen driver generates mouse press events to simulate touch behavior. This was because at the time I wrote it, my team was using an outdated Linux OS that didn't have a native touch driver.

The problem is that when I touch the +/- buttons (the scroll buttons that increase/decrease the slider by a single tick, or cause it to rapidly scroll if held), the slider rapidly slides up/down as if I had clicked and held the button. This is because my driver uses QApplication::postEvent() to dispatch the mouse event from a separate thread, and the delay in between touch and release is just long enough for it to register a click-and-hold type event, though the release event doesn't stop the sliding.

I would rewrite the application to use the now available native touch driver, but it doesn't offer enough control to be able to do what my driver does (my driver can generate left, right, or middle mouse events, whereas the native driver only provides left).

I tried rewriting the driver to use QApplication::sendEvent() instead, but that was causing a segmentation fault that I couldn't figure out the cause of.

So is there a way I can disable the "click-and-hold" type behavior on the QSlider itself? So that I can still tap the buttons, but they'll only increase/decrease by a single tick at a time?

EDIT: Here's an example of how I'm generating the "touch" events via my driver.

I use Qt5. I did not find any documentation on how to enable PKCE when using QOAuth2AuthorizationCodeFlow.

If so, please provide the link. If there is no support, how can this feature be added to it?

I added code_challenge and code_challenge_method, but it is not enough. I don't know what the next step is.

I am writing a WebCam Gui, which is supposed to take pictures and manipulate with WebCam parameters. After the video stream is activated on the main GUI window, an additional window can be opened to change the WebCamera parameters Screenshot 1, Screenshot 2.

I am using Qthread to stream on QLabel. Also, I was able to set the initial camera parameters on the camera properties' changing window. My problem is changing the Exposure parameter by using a slider on the sub-window and seeing results in real-time on the main window.

Please see the code.

I'm using Qt5 and I am trying to do this:

I tried to build and run a Qt5 (5.15.2) application on macOS (10.15.7) using Bazel 5.0.0. Unfortunately, I run into some problems. The building part seems to work, but not the run part.

I installed Qt5 on my machine using Homebrew:

How do you get CMake to compile conditionally with Qt4.8 or Qt5? In other words, if Qt5 is available then compile with Qt5. Otherwise if Qt4.8 is available use that.

In my CMake, I have:

Already referred below old posts, but its solution of installing websockets didn't work in my Ubuntu 21.10.

• Project ERROR: Unknown module(s) in QT: websockets
• Project ERROR: Unknown module(s) in QT: webkitwidgets

This could be probably due to my Qt is 6.2, while the available library is from Qt5, viz. libqt5websockets5-dev.

How to install websocket module properly for the Qt6, to fix below error?

Project ERROR: Unknown module(s) in QT: websockets

I am learning the intrincacies of unique_ptr.

I have a working example of a std::unordered_map that holds std:string and std::unique_ptr.

But I can't make unique_ptr examples with Qt's QString and QHash work. They won't compile mentioning errors like use of deleted function.

How can I make the two last examples work?

In case this info is relevant, I am using gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0.