General and Desktop

@Saviz In your table the primary key column, your auto-incrementing surrogate key, does contain unique values. You can update one record independent of the other using that number to identify the record. If you intended that the combination of first and last name was unique (i.e. a "natural" key) then you need to enforce that either in your code, or with a second unique, compound index on the table, e.g. create unique index blah on workers(first_name, last_name); (If you use the index be prepared to handle the failure to insert) If that was your intent then please consider that real world names are generally not unique and this is precisely the reason you want a surrogate key in the first place. The Qt models and views rely on a single column, numeric primary key to identify records without needing business domain knowledge to determine identity.

@Jakobm789 Could you post your entire code, please? The event loop has to spin and the timeout looks a bit like blocking code or early exit.

@Damian7546 said in Brightness screen by qt app: no, i'm not doing that Why not?

@JacobNovitsky Ctrl-Shift-Z

Well, as it turns out there were some environment variables set that caused the highdpi scaling to be disabled. I must have set them at some point, though I can't recall when or why... Thanks @Asperamanca and @SimonSchroeder for your input!

Transparency in Windows is achieved through layered windows, which is also used in Qt's transparent window and belongs to DirectUI. The entire window has only one winId (HWND) but OpenGL and DirectX require a handle to render. However, if a child widget in the Qt window obtains the winId, it will break the "DirectUI" and all widgets in the window will have a handle. Therefore, it is impossible to render a specific widget with OpenGL or DirectX in a transparent window. The solution ： Set the controls on top of the video to be Tooltip + transparent background. Additionally, when a control is set as a tooltip, its coordinates are no longer relative to the parent window but global. Therefore, special handling is required for its coordinates.

@Chris-Kawa That' s exactly what I want, thank you.

for example the source xml file // <?xml version="1.0" encoding="ISO-8859-1"?> <indexedmzML xmlns="http://psi.hupo.org/ms/mzml"> <mzML xmlns="http://psi.hupo.org/ms/mzml"> </mzML> </indexedmzML> use writeCurrentToken to write a new file, the output is like this <?xml version="1.0" encoding="ISO-8859-1"?> <n1:indexedmzML xmlns="http://psi.hupo.org/ms/mzml"> <n1:mzML xmlns="http://psi.hupo.org/ms/mzml"> n1:/mzML n1:/indexedmzML

@jsulm That my friend was the exact problem! Thank you very much.

@Chris-Kawa Thank you very much for your input. The images I have are actual photos from a vintage calculator (which took some time to make without any shadowing from the calculator keys). So yeah, it's strange (like the programmer himself, I suppose). And I discovered why my vertical spacing was off, I swapped the height/width parameters in QSize. So I'm getting there, thanks to you.

@Pixelgrease you might also want to consider migrating to cmake for the long run.

@odelaune Yes, drawForeground() would avoid all this! And you would not represent that "arrow" by a graphics item on the scene, it would just be artefact drawn on the view foreground. Which I suspect is just what you want here.

@JacobNovitsky You should not be doing anything which would cause to (try to) write/save to /usr/include/... anything --- that's a system area! What are you doing to make this happen? You didn't read in /usr/include/X11/Xlib.h (perhaps while following definitions), and then accidentally change it, did you? HEADERS += linuxkbhit.h I might be mistaken, but I would have expected the first line to end with a \, i.e. HEADERS += \ linuxkbhit.h Similarly SOURCES += linuxkbhit.cpp main.cpp ought be SOURCES += \ linuxkbhit.cpp \ main.cpp Is that relevant? You have two LIBS += lines both adding -lX11. Probably no harm, but just commenting.

May I suggest to use selection.select(left, right) instead of merging? In my experience, the former is faster.

@Narutoblaze Since I recently burned my feathers, I strongly advise you not to try to go against how the automatisms and things in general have been built, especially if it's just because you're used to doing it in a certain way. Use the signals available, use installEventFilter, avoid complications just to look cool, simplify the goals. You'll do the cool stuff in the future, after you get used to it.

@mrcbj said in qt5.9.9编译的界面程序在centos 7.6出错: compiled using qt5.9.9 Is it possible to test or compile with later version? Qt5.15 or Qt6? It may or may not fix your issue.

On Win7 (at least) transparent windows are are feature of the Windows window compositor (Aero) and you need to enable transparency in Windows graphics/system settings.

@Duyct said in Resizing components in a Window: all the components can't fit in the window Because the window is too small. Do you use layouts?

Don't install it on individual scrollbars. Use it on your application object like in the example code I linked.

@Xoaco Have a look here https://www.qt.io/blog/juce-x-qt but it has not been possible so far What happens? What does not work?