I highly encourage you to learn the signals and slots paradigm. Qt is an asynchronous framework which means that you may not need an additional thread depending on what you need to process and how you process it. Did they warm you about the nuclear footgun that it can be ? ;-)

@mrjj Thanks I tried the resource system and it works. QFile file(":/python_scripts/script1.py"); file.open(QIODevice::ReadOnly | QIODevice::Text); QString pythonScript = file.readAll();

@Lucien said in Displat Depth image in PyQT4: requires some colors in it (RGB/Mono/Grayscale) which does not fit in Mono and greyscale do not have colors, so don't know what the problem is... "QImage::Format_Mono 1 The image is stored using 1-bit per pixel. Bytes are packed with the most significant bit (MSB) first.". "QImage::Format_Grayscale8 24 The image is stored using an 8-bit grayscale format. (added in Qt 5.5) QImage::Format_Grayscale16 28 The image is stored using an 16-bit grayscale format. (added in Qt 5.13)"

@andre_sophia Glad it solved. Yes, in the normal course do all your connect()s in the __init__(), after the setupUi(), so it's just once.

I have never used QVideoWidget, but based on some prior experience with different GUI frameworks, I would caution that your results may vary by operating system, and by whatever underlying video playback engine is ultimately responsible for getting the video pixels on the screen. I tried to do something like this a while ago, and on one platform the text window (a transparent window with opaque text) that I tried to place on top of the video window worked just fine. On another platform the text was barely noticeable. You could only notice it flicker into view occasionally, like some kind of subliminal messaging. I believe the reason for the unwanted "flicker behavior" on that system was due to the video engine constantly writing directly to the video card, bypassing any attempts at layering/compositing.

I installed it using pip pip install pyside2 I'm on windows using python 3.7

LD_PRELOAD=/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Concurrent.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Core.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5DBus.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Gui.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Network.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5OpenGL.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Positioning.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5PrintSupport.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Sql.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Svg.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Widgets.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5XcbQpa.so:/home/david/.local/lib/python3.7/site-packages/ccdc/_lib/libQt5Xml.so python3.7 Python 3.7.8 (default, Jul 20 2020, 18:03:39) [GCC 10.1.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import ccdc >>> Worked like magic. 😲 Thanks a lot, @SGaist !

@Kyeiv OK, but please put the error checking code in anyway. With OS commands you never know what might go wrong (just like you discovered), so it's important to check for & report all errors! And especially if you are going to be distributing this....

Okay I cannot understand what the actual issue is but I went through and created that window with what I believe are all its bells and whistles and have rendered it below. Hope this helps solve whatever the issue is/was?? # -*- coding: utf-8 -*- #Изначально подключаются необходимые библиотеки from PyQt5.QtCore import pyqtSlot, QSize from PyQt5.QtGui import QFont, QColor, QPalette from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget from PyQt5.QtWidgets import QHBoxLayout, QVBoxLayout from PyQt5.QtWidgets import QPushButton, QLabel, QLineEdit class HeaderLabel(QLabel): def __init__(self, Text): QLabel.__init__(self) # ------- self.setText(Text) # ------- FontHeader = QFont() FontHeader.setFamily('Segoe Print') FontHeader.setPointSize(14) # ------- self.setFont(FontHeader) self.setStyleSheet('QLabel:hover {color:red}') class BasicButton(QPushButton): def __init__(self, Text, Width): QPushButton.__init__(self) # ------- self.setText(Text) # ------- BtnSize = QSize(Width, 61) self.setFixedSize(BtnSize) # ------- StyleValues = 'QPushButton {' StyleValues += 'background-color:grey; ' StyleValues += 'border:none; ' StyleValues += 'color:white; ' StyleValues += ' } ' StyleValues += 'QPushButton:hover{' StyleValues += 'background-color:white; ' StyleValues += 'color:black; ' StyleValues += ' } ' self.setStyleSheet(StyleValues) self.setAutoFillBackground(True) # ------- BtnFont = QFont() BtnFont.setPixelSize(20) BtnFont.setBold(True) self.setFont(BtnFont) # ------- self.setAutoExclusive(False) self.setAutoDefault(False) self.setAutoRepeat(False) self.setDefault(False) self.setFlat(False) class CenterPanel(QWidget): def __init__(self, parent): QWidget.__init__(self) self.Parent = parent # ------- Palet = QPalette() Palet.setColor(QPalette.Window, QColor(243, 239, 255)) self.setPalette(Palet) self.setAutoFillBackground(True) # ------- lblHeadr1 = HeaderLabel('Введите текст') # ------- HBox1 = QHBoxLayout() HBox1.addStretch(1) HBox1.addWidget(lblHeadr1) HBox1.addStretch(1) # ------- self.lneBigArea1 = QLineEdit() self.lneBigArea1.setMinimumHeight(121) self.lneBigArea1.setMaximumHeight(121) self.lneBigArea1.setReadOnly(False) # ------- HBox2 = QHBoxLayout() HBox2.addWidget(self.lneBigArea1) # ------- self.btnOne = BasicButton('Очистить поля', 181) self.btnOne.clicked.connect(self.Shift) # ------- self.btnTwo = BasicButton('Выполнить', 171) self.btnTwo.clicked.connect(self.DoNothing) # ------- HBox3 = QHBoxLayout() HBox3.addWidget(self.btnOne) HBox3.addSpacing(40) HBox3.addWidget(self.btnTwo) HBox3.addStretch(1) # ------- lblHeadr2 = HeaderLabel('Результат преобразования') # ------- HBox4 = QHBoxLayout() HBox4.addStretch(1) HBox4.addWidget(lblHeadr2) HBox4.addStretch(1) # ------- self.lneBigArea2 = QLineEdit() self.lneBigArea2.setMinimumHeight(131) self.lneBigArea2.setMaximumHeight(131) self.lneBigArea2.setStyleSheet("background:transparent;") self.lneBigArea2.setReadOnly(True) # ------- HBox5 = QHBoxLayout() HBox5.addWidget(self.lneBigArea2) # ------- self.btnTre = BasicButton('Закрыть программу', 241) self.btnTre.clicked.connect(self.CloseApp) # ------- HBox6 = QHBoxLayout() HBox6.addStretch(1) HBox6.addWidget(self.btnTre) # ------- VBox = QVBoxLayout() VBox.addLayout(HBox1) VBox.addLayout(HBox2) VBox.addSpacing(20) VBox.addLayout(HBox3) VBox.addSpacing(20) VBox.addLayout(HBox4) VBox.addSpacing(20) VBox.addLayout(HBox5) VBox.addLayout(HBox6) VBox.addStretch(1) # ------- self.setLayout(VBox) @pyqtSlot() def Shift(self): intab = 'абвгдежзийклмнопрстуфхцчшщъыьэюя АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ' outtab = 'яюэьыъщшчцхфутсрпонмлкйизжедгвба5ЯЭЮЬЫЪЩШЧЦХФУТСРПОНМЛКЙИЗЖЕДГВБА' # I have no idea what this is doing other than it takes something from the # first box and puts it in the second box trans = self.lneBigArea1.text() self.lneBigArea2.setText(trans.translate(str.maketrans(intab, outtab))) # Так как программа закрывается сразу же после ее запуска, то пришлось оставить строчку для ввода # input(" Нажмите для выхода ... ") @pyqtSlot() def DoNothing(self): self.Parent.SetStatus('Sorry I do not do anything') @pyqtSlot() def CloseApp(self): self.Parent.CloseApp() class MainDisply(QMainWindow): def __init__(self): QMainWindow.__init__(self) Top=300; Left=500; Width=618; Hight=538 self.setGeometry(Left, Top, Width, Hight) self.setWindowTitle('Атбаш') self.CenterPane = CenterPanel(self) self.setCentralWidget(self.CenterPane) self.StatusMsg = self.statusBar() def SetStatus(self, Text): self.StatusMsg.showMessage(Text) def CloseApp(self): self.close() if __name__ == "__main__": MainEventHandler = QApplication([]) # Следующий код отвечает за открытие интерфейса MainApplication = MainDisply() MainApplication.show() # Выход из приложения MainEventHandler.exec()

okay the PyQt5 QWheelEvent is documented and pretty straight forward as to how to use it -- that is if I understand what you are asking since you did not provide an MRE to make it more clear def self.wheelEvent(self, WheelEvent): that is how you would define it within the Object that is handling the Wheel Event such as your QMainWindow or whatever you are using for main GUI -- then all you have to do is handle that Wheel Event correct which is also covered in the documentation Or are you actually trying Emit a QWheelEvent if this then you need to look into defining the QWheelEvent and than simply emit the WheelEvent once you have created it and set the parameters you wish to set which you do not have to do all at once as most widgets have -- setThis methods -- thus you would start here WheelEvent = QWheelEvent()

Thanks for the links !

So, if you can set the font size in points and only use those available in Notepad's list of sizes you should be ok.

I've got a bit further than yesterday with this issue. I went back to the example on this website: http://quabr.com:8182/59438021/how-do-i-create-a-print-preview-of-qwebengineview-in-pyqt5 The problem has to do something with: printer = QPrinter(QPrinter.HighResolution) When I use QPrinter() without the HighResolution part, everything works as expected. I didn't realise that the example had the same problem since it calls the printPreview method which doesn't have the resolution part. Is this a bug in (Py)Qt? Since my problem is fixed, I'm will mark it as solved.

Yes @Sebastian1993 I have numerous solutions ;) I teach python-qt online for free however it would be more efficient for me if you would post a MUC/MRE (Minimal Usable Code example / Minimal Reproducible Example) of your code and let me look at what you are doing and help you adjust that to do what I suggested while trying to keep most of what you have

@lolcocks I did just this, and it seems to have installed everything correctly, but trying "import PySide2" within the venv that I installed everything gives a "no module named 'PySide2'". If, instead, I deactivate the venv and try to import the module, it works correctly. Any ideas?

Hi and welcome to devnet, Rather than just posting code, you should also explain exactly what you want to achieve.

Awesome, thanks. I'll keep that in mind and put in some checks just to make sure.

Okay then divide and conquer this. Create your GUI initially giving it a Dictionary of hard-coded data that represents the data coming from the database get your Gui to work with that data in the manner you are wanting. I do something similar with my project as I deal with a QTreeView (the QTreeWidget was not necessary) and QStandardItemModel supplying it a Dictionary of rows and it works like a charm Basically step back and simplify your approach making it overly complicated/complex just makes it harder to work with. I have a database class template that I shared with several folks already as well as the students in my free python-qt classroom on Discord but I think I also have an example program of rendering the QTreeView as well then all you would need to do is implement that add and substract aspects which are also fairly easily done if you work with your data behind the scenes and then just repopulate the view after that data has been adjusted

Well without seeing the code you use to create the object you are passing in -- it is hard to see what you might or might not be doing wrong -- better yet supply an MRE (Minimal Reproducible Example) that shows this functioning and produces the same error you are getting when it is run --- then we can help you troubleshoot your bug so much more effectively and quicker to boot

@RemcoMusic I know this is not PySide2 but PyQt5 is really really close and here is discussion on getting QtCharts to work perhaps something they tried/did might help you as well https://github.com/ghostop14/sparrow-wifi/issues/1

This work project responde to many problems How to integrate matplotlib in Pyqt5 include : Open file to read and write (read data , save data to .txt file) by pyqt5 how to use QlistWidget how to use figureCanva to Both plot 2D ,3D

@younglegend Yes I am too confused -- what is it that you still need help with here -- please be specific in what was not covered?

Depending on what your image is, you can create a custom QAbstractSlider that will draw the image and then the cursor on top of it.

@behruz-montazeri if you want to learn how to do MVC within python-pyqt shoot me a message on Discord at DenniO#8137 and I will dive into that with you as well as share some example code as that can be a rather extensive discourse.

That depends on what you are actually trying to put into the ListView -- your List of Dictionaries is a bunch of Dictionary Objects or just the names of those Dictionary Objects?

@a_person Find out what it is about your environment that does make it find PyQt5 when from the terminal or wherever (e.g. maybe you have a virtual environment, I don't know), and then compare that environment to the one being used inside Qt Creator at run time which does not locate it?

@ruchitinfushion okay hopefully all you have to do is replace the reference to PyQt5 with PySide2 but not sure on that one. Regardless if you cannot get this to work straight out of the gate then at least it should point you in the right direction of how to implement what you are trying to implement -- it also gets rid of the unnecessary Designer junk that was there and extends the classification appropriately. Lastly I do not have your images so I simply commented that part out and used straight Text. So hopefully all you will have to do is implement those lines if I read the documentation correctly -- so just comment out the pure Text lines in favor of the Icon/Pixmap related stuff from sys import exit as sysExit from PyQt5.QtCore import Qt, QSize, pyqtSlot from PyQt5.QtGui import QFont, QIcon from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QComboBox, QVBoxLayout, QLabel class CentralPanel(QWidget): def __init__(self, parent): QWidget.__init__(self) self.MyParent = parent # Best just to load these once at start self.pmHigh = QPixmap('E:/code/highStats.png') self.pmMedm = QPixmap('E:/code/mediumStats.png') self.pmLows = QPixmap('E:/code/lowStats.png') self.pmNorm = QPixmap('E:/code/normalStats.png') qgFont = QFont() qgFont.setFamily("SF Pro Display") qgFont.setPointSize(16) qgFont.setWeight(75) qgFont.setBold(True) self.lblIconHldr = QLabel('Hidden Label') self.lblIconHldr.setFont(qgFont) self.lblIconHldr.setAlignment(Qt.AlignHCenter) self.lblIconHldr.hide() self.cbxStats = QComboBox() self.cbxStats.setFont(qgFont) # self.cbxStats.setIconSize(QSize(70, 20)) self.cbxStats.addItem('High') self.cbxStats.addItem('Medium') self.cbxStats.addItem('Low') self.cbxStats.addItem('Normal') # self.cbxStats.addItem(QIcon('E:/code/highStats.png'),'High') # self.cbxStats.addItem(QIcon('E:/code/mediumStats.png'), 'Medium') # self.cbxStats.addItem(QIcon('E:/code/lowStats.png'), 'Low') # self.cbxStats.addItem(QIcon(E:/code/normalStats.png'), 'Normal') self.cbxStats.currentIndexChanged.connect(self.SetIcon) vbxLayout = QVBoxLayout() vbxLayout.addWidget(self.lblIconHldr) vbxLayout.addStretch(1) # The position of this affects how things are rendered vbxLayout.addWidget(self.cbxStats) self.setLayout(vbxLayout) @pyqtSlot(int) def SetIcon(self, Indx): if Indx == 0: self.lblIconHldr.setText('High') # pmImage = self.pmHigh elif Indx == 1: self.lblIconHldr.setText('Medium') # pmImage = self.pmMedm elif Indx == 2: self.lblIconHldr.setText('Low') # pmImage = self.pmLows else: self.lblIconHldr.setText('Normal') # pmImage = self.pmNorm # pmImage.scaled(70, 20, Qt.KeepAspectRatio) # self.lblIconHldr.setPixmap(pmImage) self.cbxStats.hide() self.lblIconHldr.show() class statsMainWindow(QMainWindow): def __init__(self): QMainWindow.__init__(self) self.setWindowTitle('Main Window') self.resize(300, 275) self.CenterPane = CentralPanel(self) self.setCentralWidget(self.CenterPane) if __name__ == '__main__': MainThred = QApplication([]) MainGUI = statsMainWindow() MainGUI.show() sysExit(MainThred.exec_()) # If anyone wants more extensive free help I run an online lab-like classroom-like # message server feel free and drop by you will not be able to post until I clear # you as a student as this prevents spammers so if interested here is the invite # https://discord.gg/3D8huKC

@daljit97 that is awesome -- but to reiterate for future questions you might have - including an MRE (Minimal Reproducible Example) which means one can simply copy/paste the MRE and run it to get the same results greatly speeds up getting an answer. If you include an MRE that will not run because it has elements removed that are still referenced that is not technically an MRE because it does not reproduce what you are experiencing.

Well without seeing a minimal fully functioning example of your code it is kind of hard to guess what you might be doing wrong. However as a general answer I (unless the combo box has a large amount of data in it) just store this data in dictionary and/or list and then add to the dictionary/list -- purge the combo box -- and add the data pre-sorted back into the combo box

This is my experience with "Ravi, Robbie" and whoever is running things at goslicd. I interviewed over a skype call and in my oppinion it went very smoothly and it was a good interview. He knows I'm at least qualified if not over qualified for this job. He said over skype that he would send me the coder agreement that I could read over and then get back to him on it. He never sent the agreement. It's been 2-3 days. It was supposed to be sent right after the skype call. No email from him. I sent an email asking about it. No response was returned. I said I was open about how much I would get paid per milestone. That would be an employer's wet dream, right? There is no hourly wage, it's jut pay-by-milestone + equity (so they say). Another horror story from the dishonest, fake, unfair job market. This post has no business in the Qt forums, with such disrespect shown from the hiring party. Well, they do have about a 20% chance of success as 80% of startups fail. Good luck to them! I could have finished all of the project milestones in less than half the timeline stated. Their loss. Thinking of applying? Don't waste your time.

@nekitamtip what I would do is not rely on the call stack as @Kent-Dorfman points out its unreliable at best and not available due to threading issues (now that does not mean it cannot be just means it would take a lot of work and time to figure it out if it is even possible). So with that said and a much easier methodology for handling this in code regardless of the coding language you use here is what I do. Any place you plan to "raise" an error or handle an exception include enough information so that you can easily determine where that error occurred along with what that error was. In your example I would change the raise to read: raise Exception('MyTreadWorker.job_with_exception_raised :' + error_message) This basically (at a glance) tells you where the error occurred in detail and if the error was dynamic what that error was -- note if the error is static then simply replace [ ' + error_message ] with [ Description of Error ' ] again do this any place you raise an error and/or use a try except -- further I would actually call an error_handler routine in case I want to switch from live debugging to production debugging and want those errors posted to an error-log of some sort. Basically it is considered quality programming that when you raise an error or handle an exception that you report enough information back so that with that error message you (1) Know exactly where the error occurred (2) Know exactly what the error was (3) and include any extra information that might be available that would make fixing that error much easier If you do this as a standard within all your code you will soon find out that tracking done bugs becomes a trivial task.

First off regardless of the coding language you should follow the MVC (Model-View-Controller) methodology of coding which basically divorces the front-end (View) from the back-end (Model) by putting in a middle interpreter layer (Controller). Why do this well first it has the benefit of separating functionality and focusing each element on what it does best. The GUI (View) is best for handling the user interface and not very good with dealing with the data, while the Database (Model) is best for handling the data and is not very good with handling the user interface. The Controller is just the method for moving the data from the View to Model. This also has a secondary benefit if you ever change the back-end with a different database engine the only thing that is effected is the Model and maybe a bit of the Controller the GUI is essentially untouched and vice-versa if you wish to change the front-end the only thing that really changes is the front-end since all the API calls to the middle-tier would essentially remain the same. Further should the business logic affecting the data occur that is generally dealt with within the Controller or the Database depending on the implementation of the business logic. For instance data validation and manipulation generally takes place within the Controller layer making sure that no bad-data gets into the database which is always a nightmare and something that happens often if you directly tie the front-end into the back-end. So in short use pyqt5 to handle your front-end GUI and use python to handle your interface to your database (validating and moving the data to the database) and let the database do what its best at doing - handling the data with storage and stored-procedures, triggers, etc... I hope that helps

@badr You have one table widget (or similar, actually presumably QTableView rather than QTableWidget since you have your own model) holding rows & columns from a SQL query. You say you want another table widget to show a column "computed" (at client side) from columns in the first one. So why not create a second model whose data() method is overridden to perform the necessary computation and return the desired final string for Qt::DisplayRole using the index.row/column() (not just the index) as indexers into the SQL model's rows/columns? Or, if you want to stick with your current usage of QTableWidget (not ideal that you use Python SQL calls and copy result set into that, but up to you), you could make your second one a QTableWidget too and use setData() to populate its rows/columns with the actual corresponding strings whenever the first one changes (more work depending on how often your data changes, but in your case it might only be during loaddata() when you populate if it does not change thereafter).

@Hodenbrecher one of the quirks of c++ QQuickItem is a forward-declared class https://en.cppreference.com/w/cpp/language/class#Forward_declaration

Just an update. It looks like the QtCreatorDeployment.txt file is only taken into account by CMake Project or Generic Project. So I created a Generic Project, add the Python file(s) to the .files file, removed all the steps from the Build Settings tab, and configured the Run Settings with a Custom Executable where I set python as the remote executable, and main.py as the command line arguments while enabling Forward to local display. And it worked :-)

@BobbyG Below is the sample code which can be used to update the Chart from C++ void PlotData::updateData(QAbstractSeries *p_series) { QVector<QPointF> pointList; pointList.reserve(numPts); for(int count = 0; count < plot_data_vector.size(); ++count) { pointList.append(x_data, y_data); // fill your plot data here } if(p_series) { QXYSeries *xySeries = static_cast<QXYSeries *>(p_series); xySeries->replace(pointList); } } void PlotData::clearSeries(QAbstractSeries *p_series) { if(p_series) { QXYSeries *xySeries = static_cast<QXYSeries *>(p_series); xySeries->clear(); } } And from the QML you need to call this function by passing the chart view series. PlotData.updateData(chartView.series(1)) Hope this helps...