General and Desktop

@Gaurav-Badgujar Are you sure this->webview is valid ? Only reason i can think off. It shows zero. Often sign of dangling pointer Please show the function where you new it.

Thanks again @mrjj for your persistence on my matter, If there are say 3 undo levels in my main undo stack to get to the point of insert text. Then say I have 20 levels of undo into my text edit. I'm going to have to monitor each and every undo insert with a counter. Then if I hit the core undo app undo I'm going to have to loop through that counter to one hard undo. This will be too 'hard' on the user. There are a few other issues that will creep in that will make the user's experience more uncomfortable doing it this way. Things like when I go out of 'focus' into another part of the app I will have to probably wipe undostack for the text editor. This said I will branch off and have a play around with your method when I get the times. Really appreciate the inputs thank you.

@Asperamanca said in QGraphicsItem not updating the position (always at 0,0): QLineF sceneLine(source->mapToScene(0,0), dest->mapToScene(0,0)); // now sceneLine contains a line between the nodes in scene coordinates setPos(sceneLine.center()); // Now my edge is positioned at the center between the two nodes QLineF line(mapFromItem(source, 0, 0), mapFromItem(dest, 0, 0)) It works. I just had to calculate the sceneLine center because thereis no method center() on my qt version. Before reading your solution I was trying this: this->setPos(this->mapToParent(this->boundingRect().center())) I think it also works ok. But your solution looks more clear. I don't know it it's ok to use boundingRect in my solution. @Asperamanca , thank you so much again. Best regards. Edit: changed from mapToScene to mapToParent just in case it's used as a child of other item.

@Andy314 There might be some additional custom changes to release build

@Eligijus : Thank you, but I think you forget something I wrote in my question, look at the following quote: Note that I don't know what the container contains I just told you an example of the objects types that the container can contain. Anyway, I thank you.

@Fuel QVariant::fromValue<StarTable>( starTableVar );

Its Solved :) @Taz742 said in Qt Smtp Mail Sender - Outlook Encoder Problem: message.append("Content-Type: multipart/mixed; boundary=frontier\n\n"); reply: message.append("Content-Type: multipart/mixed; boundary=frontier; charset=UTF-8\n\n")

@Galilio Sorry, currently I have no time to analyse your code. You should read: https://mayaposch.wordpress.com/2011/11/01/how-to-really-truly-use-qthreads-the-full-explanation/

@feodor_ra said in How to create custom series class for QChart: is impossible because everything related with QGraphicsItem containts in QAbstractSeriesPrivate class. This should not be the problem, the real problem is here: https://doc.qt.io/qt-5/qabstractseries.html#SeriesType-enum i.e. the series types are a closed group that can't be expanded. All you can do is add your own series into Qt sources and recompile the whole QtCharts module

@mrjj This has solved the problem. I've created by own base Widget which overrides the paintEvent as you've suggested and everything works beautifully. Thank you.

@unclejimbo You are aware that you can check also for bug reports on issues on JIRA? The forum creaditials are also for JIRA.

Adding the QObject constructor to my class's constructor and adding the pointer-to-member syntax suggested by Kshegunov fixed the issue. Thanks guys and good day.

@SqYt said in Implementation of Conway's Game of Life: graphic this graphic variable is a GUI class right? If so than you are doing something you should never do in Qt: using GUI classes in other threads! GUI classes should only be used in main thread. If you want to trigger an UI change from other threads then just emit a signal there and connect a slot in your main thread where you then update the UI.

You're welcome. @CroCo said in Credit card application for online shopping: Does Qt documents have any example regarding this matter? The Qt documents don't have any examples for "communicating with credit card payment handlers". The Qt documents have examples for web communications. You need to do a few different things: Choose your payment handler. Read your payment handler's documentation, to learn how to communicate with the payment handler service. Read Qt's documentation, to learn how to do general web communications. Combine your knowledge from #2 and #3 to build your application.

I modified the code to be class CustomTableView(QTableView): def __init__(self,parent=None): super().__init__(parent) class CustomStandardModel(QtGui.QStandardItemModel): def __init__(self,parent=None): super().__init__(parent) class CustomStandardItem(QtGui.QStandardItem): def __init__(self,parent=None): super().__init__(parent) table = CustomTableView() model = CustomStandardModel() table.setModel(model) /... #fill the model with CustomStandardItem objects .../ color = QtGui.QColor() color.setNamedColor('#00ff00') column = 3 for row in rowIndexList: cell = model.item(row,column) start = time.time() cell.setBackground(color) end = time.time() print('time to set background' + str(end-start)) And this is significantly faster than the qtablewidget. output: [image: 0845355d-ec52-43f2-901b-10ae1dc9d6a9.png] EDIT: This loop for setting columns to autoresize was causing the initial problem of setBackground taking so long, with it commented out the QTableWidget is as fast as the QTableView. This loop runs once after the table is loaded with values, however every time setBackground is called it is affected. for col in range(self.columnCount()): self.horizontalHeader().setSectionResizeMode(col,QHeaderView.ResizeToContents)

I didn't wrote about connection error, but about connecting the error signal of QNetworkReply to know when something goes wrong.

Perfect. Thank you.

@Avtansh-Sharma Hi Using a thread will most likely not make any difference with the current issue but when you use signals from inside a thread , it's sometimes necessary to add Qt::QueuedConnection to the connect statement. https://woboq.com/blog/how-qt-signals-slots-work-part3-queuedconnection.html