By the way, how are your buttons connected ? You might want to rather call the dialog's accept slot from on_buttonBox_accepted rather than connecting it directly to your button.

Hi 10.000 items take some time to create and add. Print_Descendants_key must not touch/access the ListWidget from the other thread. that will not be good. To make the UI less hanged while adding such a number of items, you can do 3 things. 1: use a View + custom model instead. If you already have all the data in a list/vector, a custom model on top of that would be super fast. 2: Use a thread to send data to main. Make sure the thread is not hammering the main gui as that would lag too. You can also use a QTimer and simply slow down the adding. 3: Do the ugly trick of calling QApplication::processEvents() (in the loop that adds the items) to allow the main GUI to be more responsive.

Hi, In your class declaration. Note that this is basic C++. If you do not know that, I highly encourage you to first improve your C++ knowledge before going further.

@learnist please don't double post.

@Mr-Workalot First of all, it seems that you don't use any layouts. Secondly, don't hide your widget by just resizing your dialog (if you are trying to do that). Better hide the widget itself. To set a width anyway, you can use QWidget::resize(int w, int h)

Hi The downside of having 22 dialogs is all the .cpp and .h you get and also adding new features, say you want to have an image of the dish at some later point you would have to add this 22 places. For your use case, it sounds like data driver would be much better. Meaning you have just one dialog and then based on the data structure where you keep the information about the recipes, you add the needed EditLines at runtime. SO as @JonB asks, are they that special each of the dishes that you cant handle them very much the same?

@learnist said in Send Variable values from QDialog to QMainwindow function: Awesome, it works great, but function can return only 1 QString, it might be from 1 line edit, but i have multiple line edits in my QDialog box, so how can i deal with that situation? I will just throw this thought in. You may not fancy changing your architecture, but it is good to know about if you start having a lot of widgets to deal with. https://doc.qt.io/qt-5/qdatawidgetmapper.html is a very nice interface between multiple widgets and back-end data, without you having to write lots of dedicated getters/setters. But it requires you changing so that your data is all kept in a model. Bear it in mind.

ok, stupid me! I forgot to include Qwt in the *.pro file: ... CONFIG += qwt INCLUDEPATH +="/usr/include/qwt" LIBS += -L/usr/lib -lqwt

Thanks but I asked same question on StackOverflow https://stackoverflow.com/questions/55471486/how-can-i-set-maximum-width-to-which-qscrollarea-within-qdialog-will-expand-wi/ The reason of such behaviour is cause QScrollArea::sizeHint() has boundedTo(QSize(36 * h, 24 * h)) , where h is fontMetrics().height(), at the end of implementation. So reimplementing sizeHint() is doing the job just fine

Then add a signal to your dialog that you will emit when needed from your mouse move event.

I ran into the same problem, where a closed QDialog would magically appear over a QMainWindow when hovering over the programs' TaskBar icon... I understand that QDialogs do not get shown in the TaskBar thumbnail, but how does the Dialog appear out of thin air, after dismissing it?? @GreenSadFrog said in Incorrect QDialog view in Windows 10 taskbar: If you click on the thumbnail (activate the window), QDialog will hide quickly to the correct state. The problem OP described doesn't have anything to do with the Dialog not being shown in the Thumbnail btw Seems to be a known bug https://bugreports.qt.io/browse/QTBUG-48855

Thanks, mrjj! That's it! Merry christmas

@enjoysmath I wouldn't expect to need to use that, and would have thought it could lead to other problems. A dialog should be on top anyway. Did you try just passing the main window as the parent?

Hi, Why are you mixing both like that ?

@mrjj understood. thank you.

@magicstar Thanks i landed up using this. Worked

@SGaist Ahh thank you. Totally overlooked that while implementing.

@Ocram10 said in Resize QMainWindow and QDialog: proprietà di windows "Ridimensionamento e layout" Dove trovi questa variabile?