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Frameworks & web · #qt
Accessibility improvement paths for Spyder's custom widgets Spyder 5.x relies on Qt5/Qt6 for baseline accessibility (AT-SPI, UIA, VoiceOver), yet custom components such as the Variable Explorer and IPython Console do not fully expose roles, states, or focus information to screen readers. Two documented strategies exist: Approach A – implement QAccessibleInte
I'm trying to run some code that uses Qt GUI, but I keep running into this error that's preventing me from proceeding. I'm running Ubuntu 21.10, and Python 3.9.7. My code is as such. This is the error I get: qt.qpa.plugin: Could not find the Qt platform plugin "wayland" in "/home/peepo/.local/lib/python3.9/site-packages/cv2/qt/plugins" I went to the folder i
Problem I have a QObject-derived class whose signals should only be emitted by the class itself, but since the signals macro expands to public in Qt 5 and later, any code that can see the header can call emit mySignal() . I want to prevent accidental external emission at compile time without breaking existing connect() calls from other objects. What I unders
Spyder's IPython Console relies on a persistent IPython kernel process. When the kernel crashes or the socket connection is lost, the console becomes non-interactive and execution controls are disabled. Today this transition is conveyed primarily through visual cues in the console and status bar, creating an unresolved decision about how the same state shoul
Qt documents that a QObject has thread affinity: timers and sockets must be created, started and stopped in their owning thread, and use from another thread is a documented failure condition, not a portable guarantee. Cross-thread signals follow a related rule: with Qt::AutoConnection , delivery becomes queued, so the slot runs later in the receiver thread's
Goal I am designing a low-downtime update path for a small Qt 6 (C++) desktop application. The plan is to ship replaceable components as plugins loaded with QPluginLoader, unload the old plugin at runtime, swap the file, and load the new build — avoiding a full application restart. Observed behavior After calling deleteLater() on the instance obtained from Q
Ambiguous DST times in Qt When a local wall‑clock time occurs twice during the fall‑back transition, Qt must decide which UTC offset to apply. The default is to use the earlier offset, but this choice is not formally guaranteed across operating systems or future Qt releases. Unix‑like hosts query the IANA time‑zone database while Windows historically consult
Qt 6 establishes CMake as the primary build system, replacing the legacy qmake .pro file structure for the framework and its official examples. This transition aims to improve dependency management via find_package() and target-based linking, which are critical for maintaining repeatable development environments across different machines. While Qt Creator ab
Qt QNetworkAccessManager vs QTcpSocket: Interoperability of concurrent network requests The goal is to understand how concurrent HTTP requests behave when issued through QNetworkAccessManager compared to raw QTcpSocket instances, focusing on perceived latency and queuing effects. Key constraints include the default maximum connections per host (6), the inter
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