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Hi @JonB, I've realised, that I forgot to add something to my code, so it works now. Thanks for the help anyway.

@VRonin As he pleases, if he sees this (unless you want to refer him to that from there). He doesn't seem to want to change, and thinks other things are at fault too, so it's probably a losing battle...

ok, too bad. Thanks for your help

@Pablo-J-Rogina , of course, thank you.

@jsulm I accidentally also changed the Qt folder location.But after changing the Qt folder location it crashed and my OS become disable to detect QT. but after reinstalling it my problem is solved. i installed it using terminal. sorry for my bad English.

@LT-K101 said in Calling a lineEdit value from one form to another form: I declared it as a global variable and it worked. I know, but that is so not the way to do it! I don't begin to have the time to show & teach you what you should be doing, I'm afraid....

@JonB said in Avoid "Not Responding" when adding rows to QTableWidget: It sounds like your slowness is to with many widgets on a QTableWidget. Not only widgets, adding rows to database also causes slowness. To solve the slowness, having the unsolved delegate topics (Add widget right aligned to a QTableWidget cell and Add QPushButton to QTableWidget cell without using QTableWidget::setCellWidget) answered solves the problem since all I will have to do is to add rows to database in a thread. Right now longuitask solves the problem described in the OP, but @jeremy_k pointed out that it's not the ideal solution so I am trying to understand why he said that and trying out his sugestions.

Edit: I solved it. Or better said, the problem is gone. I made the application executable by using pyinstaller. I used to just give the command my path to the application. However, my application runs in a virtual environment. Installing pyinstaller in said virtual environment and executing the command while still in the virtual env, the problem with the double-click was resolved.

@JonB said in Help with QTextstream splitting "lang=2": I have not tested, and you may say it does not apply to you because you will only ever have one line (in which case the whole overhead of using a QTextStream seems quite pointless to me), but what does your new code do now on a file like, say: var1=value1 var2=value2 MyTextStream is good for splitting a single text line only - it is the replacement for the unsafe sscanf -- you split the line and put values according their types. var1=value1 is a text line that could be split in two QStrings var and value1. but if you have var1=15.5 you can put 15.5 directly into the float var. QString qstr = "lang=2.23"; MyTextStream ss(&qstr, '=', ' '); QString lang; double kol_lang = 0; ss >> lang >> fixed >> kol_lang; QString qstr = "var1=value1"; MyTextStream ss(&qstr, '=', ' '); QString lang, qval; ss >> lang >> qval;

@Sucharek said in QFile write to specific line: what specific point? Specific position in the file where next read/write operation will work https://doc.qt.io/qt-5/qfiledevice.html#seek But, as @J-Hilk wrote, you will overwrite what is at this position, not insert. If you want to insert something you need to write the old content at the location where you're inserting after the inserted data.

@jronald The positions of the mouseXEvent methods of the classes that inherit from QAbstractScrollArea such as QTreeView are relative to the viewport.

@IknowQT You probably did not build QtCharts module.

Hi, Depending on your needs the QLiteHtml playground project might be of interest.

@Publicnamer said in QHash value result when key is not in hash: If the hash contains no item with the key, the function inserts a default-constructed value into the hash with the key, and returns a reference to it. If the hash contains multiple items with the key, this function returns a reference to the most recently inserted value. This is from https://doc.qt.io/qt-5/qhash.html#operator-5b-5d NOT from https://doc.qt.io/qt-5/qhash.html#value-1 !

@Swati777999 qDebug() messages appear when your code is run. They go to the Application Output window, or I believe to somewhere funky and hard-to-get-at if you are running under Windows. Is that your situation? If you are talking about a message to be issued when compiling your code, you will need a "directive" understood by your compiler, like #warning "This is a warning" (GCC) in your code, and that would go to the Compile Output Windows.

@JonB yes, I have tried that previously. But there's some rows that i have to make it custom. But It Solved now with QGroupBox. Thanks for your answers again

@Publicnamer It's all in the documentation: https://doc.qt.io/qt-5/qhash.html#erase

I've found the cause of the problem, mouse position when clicking on a menu item is different from the mouse position when popping up the context menu.

@Swati777999 https://forum.qt.io/topic/131521/displaying-qstring-variable-in-application-output