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@JonB delete looks worked in Mac . It shows zero leak.. very good news. What is interesting that same code looks leaking in ubuntu 18.04 ! How is that possible ? Is there any tools like "Instruments app mac os x " in Linux OS ? valgrind crashing when the thread started in app, still trying but ...

@Milosz The problem was solved by upgrading Qt from 5.10 to 5.12.2

@JonB Your second solution worked perfectly so thank you very much <3 I put "solved" on the subject :)

@kuzulis is right, official 5.6.3 is the last release compatible with Windows XP. I've heard from some people here in the forum, that they use 5.7.1 on XP too, but there is absolutely no guarantee that it works. Regards

Oh, finally! With the help of @J-Hilk i realised what was wrong. add if-cheks in "lights" functions. assign currentButton to nullptr in the constructor. (i mistakenly thought that created pointers of the objects without assignment by default nullptr) Now no crashes. Tnx @J-Hilk !

Right click on the sub folder with the same name as the Project name. Select "Add New" [image: 670f2908-2b8f-499f-a38d-305d2459beca.png] ! Select QML files, Font Loader [image: 0ea24c10-31d0-448e-8e6f-a5516178bf2f.png] Select Enter any name for "component name", e.g. "Comic". For "Font" segment, browse directly to where the font is located. Click "finished" [image: bccd31aa-cd34-4327-be6c-2b61b3ad92a2.png] "Comic.qml" file will be create in the sub folder. Open it to see what is the source name of the font. E.g. "comic.ttf" [image: b9d5666a-0a7e-448b-bfe6-184ca3a17a02.png] Edit the file "Constraints.qml". Edit the line highlighted. I named it "comicFont", source name "comic.ttf" For the subsequent 2 lines where the name "mySystemFont" is used, change it to "comicFont" [image: 2b5ddf40-a838-4f06-bbe4-c10d3b63a555.png] In the Designer's Text Editor tab, select a Qt text object, add the line "font.family: Constants.font.family" to it [image: b51068cd-08b1-438c-b6d0-c58a9b8015af.png] In Designer Form Editor tab view, your font should become "Comic Sans" At the "Navigator, Properties" tab, under "Font", you should also see "Comic Sans MS" displayed. But it is un-selectable in the drop down list. [image: 95874067-44ae-4230-b077-f5a0ae516df4.png] !

Because items have no visual representation, that's done by the delegate. If you want to go that way, you have to re-implement the mouseXXXEvents of your QTreeWidget. As an alternative, you might want to add a vertical QHeaderView like QTableView.

Hi @Princein, which macOS version? which screen resolution? which Qt version? how do you open the file dialog from your code? Regards

@tomy What about https://www.youtube.com/watch?v=_gSC60y8woA ?

@jsulm [image: 44bbd49e-c54d-4be2-a220-e4b63f7d56e6.png] I think it's a QtCreator bug. I can write code like this: ui->macLab->setText(id); and compile app ok without error, just QtCreator can't Self-recognition macLab, it doesn't have keyword color. [image: b5f1440b-e409-4715-affe-1b47f7679d7e.png] Like this, first row macLab is not self-recognition, it's color is black, it should be red color like second row. But after I build or rebuild the project , macLab will have red color. [image: 788e6c14-f43f-415a-9a10-69b7371cb35b.png] Some error info like this: [image: f70813b8-81be-4eb8-8c6f-099f8871f35d.png]

@mrjj Thanks, that fixed it.

@mrjj thanks.. solved

Would you be able to post a link to the Mac/win binaries so I can download them? I'd like to make them available through github. Thanks.

The Qt is pretty darn good. thanks again.

Hi When you switch back to code, you can do ctrl +b to build just that the file. That will make them avialable via ui->

Hi Adding to @SGaist , you should also have some understanding of SQL in general. https://www.w3schools.com/sql/

Internally it's json and you can do queries on it, and that's the case for a very long time already: https://www.postgresql.org/docs/9.3/functions-json.html If you don't pass valid json to such a column you also get an sql error.