#Qt update gui from different thread code
the heavy calculation code works well the only problem is the qgis and GUI are not responding while the code is being executed. Specifically, the tasks that are not using signal/slot mechanism during.
#Qt update gui from different thread update
I tried using threads but my knowledge isn't enough and QGIS Crashes when I am trying to update the logger and progress bar from the second Thread. Choosing between using QThreadPool and QThread Tasks that dont need the event loop. It is inspired by the class design of QtWidgets, but runs on top of QtQuick. QSkinny offers a Qt API to write user interfaces in C++.
It is using the Qt scene graph and is written fully in C++, thus making QML optional. I have already tried QgsTask, but it doesn't work form me as in cookbook clearly mentions "must NEVER use any QgsVectorLayer, QgsProject or perform any GUI based operations" TL DR: QSkinny offers a QWidget-like library built on top of the modern Qt graphic stack. How can I keep GUI(progress bar and the logger) alive while I do the heavy calculation? #in Here I modify all layers, all geomerty and for each action I update progress bar and logger # there is a log textbox and with some logic this will write the logs #this will be called when every user clicks the Run button To make it easyi just put the concept I use in my program class maindlg:
The actions normally take 45minutes to 1hr I want that each thread while it runs in loop update gui label indicating how many msg he sent. Assigning ownership to the scene graph is often preferable as it simplifies cleanup when the scene graph lives outside the GUI thread. and when main form loading i am creating an array of client objects ,then i create same number of thread arrays that ech thread getting his own instance of client that gonna do all comm work to server. When the user clicks the Run button the GUI/QGIS will become "No responding" There are several articles in this forum that explain many different techniques to update the UI from a thread. About Qt is that you must work with Qt GUI only from GUI thread.
I have a GUI designed with PyQt, this GUI has a progress bar and a logger. 6 days ago Modify Qt GUI from background worker thread.
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