General and Desktop

Hi, @Zapelniczek said in Building OCI plugin on Windows: After deleting file config.cache i was able to build correctly plugin. Plus i had to switch to 32x compiler and qmake to get rid of linking errors for some reason qmake only linked 32x libraries from enviornment variables. Problem solved. Likely because only the 32bit versions of the dependencies are located where your environment variables points them.

@AlexisLara19 said in QTcpSocket to PLC S1200: but don't works fine What are the issues? The problem is that you cannot use it with Qt? Are you able to use it standalone?

Your dll version ?

@CEO Plop, so you know more about me than I know. Do not overestimate me, I do not understand some things because perhaps you do not know how to explain it or because I am not able to understand you.

Hi, Using the widgets module implies the gui module. By the way QVector3D is in the gui module. Are you using classes which requires a QApplication ? If not the just use a QCoreApplication. If you need a QApplication then use the offscreen backend.

Hi, You bring that question to the OpenCV folks since you are using their library to handle such files. They will be better equipped to answer about the limitations of their framework.

@Rabih-EL-Kadi I haven't used windeployqt. But I would have thought it should include that Qt5Xml.dll correctly for you. I don't know how it works, but verify whether you have told it about that file?

@Qt-embedded-developer I think it most unlikely that an implementation of snprintf() will "crash" (or go wrong) if more than 20 characters, and I don't know where you think you have heard this. It would have been reported. So static char filename[20]; snprintf (filename, 20, "/dev/i2c-%d", adapter_nr); should be fine. However this doesn't matter if you use QString methods anyway.

@coilo said in Load a csv file into a QTablewidget: Why should i create a QAbstractTableModel ? I am sorry i am new with qt so i don't really get it I didn't propose to create QAbstractTableModel, I proposed to create your own model that will do CSV file operations and derive this new model class from QAbstractTableModel. Have you checked the URL I provided? As you are new to Qt I highly recommend you to read it in order to better understand Qt approach for similar tasks. It will save you time in future. Of course you may use QTableWidget alone if your task is pretty simple.

@MScottM Error: SerialFirmata is not a type

I do not see anything like a button being hovered with moving text in your video. If the overall size of the button is not changing, and you increase the bottom border from 0 to 2 pixels, then the padding and content would have to move up to allow the border to be drawn. https://doc.qt.io/qt-5/stylesheet-customizing.html#box-model You could try always having a 2 pixel bottom border that changes from rgb(255,255,255,0) to rgb(255,255,255,255), i.e. from transparent white to opaque white.

@SimonSchroeder said in Blocking Signals to child widgets: One further possiblity (which we have in some places in our code) is to use a seperate wrapper class to block signals. This is, in our code, a class called SignalBlocker. The constructor(s) call blockSignals(true) on the object handed to it and the destructor calls blockSignals(false). In a addition to this operator->() is overloaded (this is C++, though), which allows for simple syntax: SignalBlocker(this->_edit_distance)->setValue(source.distance); SignalBlocker(this->_edit_someothervalue)->setValue(source.someothervalue); There's QSignalBlocker that accomplishes the same task with slightly different syntax. PyQt5's documentation mentions the class.

@satyanarayana143 Do you use more than one display in your setup? Maybe one being HighDPI and the other being a regular display? Or are you having trouble with just a single display (which is HighDPI) connected? Are you planning on supporting multi-monitor setup with different resolution scaling? The solution to your problem depends on what you are trying to achieve (supporting different scalings on multiple displays is quite involved and simpler solutions can be used if this is not your goal).

@JonB setting ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents); helped, thanks a lot!

then that way is not possible. You can incorporate c files/code in a c++ project or you can include a c++ library(precompiled) in a c project but you can't s imply include c++ code into a c project.

@RootLearner said in Slots in the second window?: When receive slot is called, the ui is not updated but when I close the window, the qDebug in "opening movielist" and case 0 is run. How do I solve this? I need it to update the ui as per the integer passed via signals. For me it looks like there is a forever loop which locks the thread event loop. The emitted signals are stored in event loop, but as the thread is lock in a forever loop, the associated slots are called when forever loop ends and event loop is running. What are you doing in movie class?