在Qt中,遇到qobject::connect: signal not found in qpushbutton这样的错误通常意味着在尝试连接一个信号到槽时,信号名称在QPushButton中不存在或者信号名称拼写错误。下面我将基于你提供的tips,逐一分析并给出可能的解决方案: 确认QPushButton是否正确发出了信号: QPushButton确实发出了一些标准的信号,如clicked(),...
self.connect(quit, QtCore.SIGNAL('clicked()'), qApp,QtCore.SLOTNameError: name 'qApp' is not defined,程序员大本营,技术文章内容聚合第一站。
PyQt6 Toolbars & Menus — QAction PyQt6 Dialogs and Alerts Creating additional windows This tutorial is also available for PySide6 , PySide2 and PyQt5 So far we've created a window and added a simple push button widget to it, but the button doesn't do anything. That's not ve...
signal from a QThread, then the data is not cleared. In addition, if the QThread emits its signal first, clicking the button later will not clear the data but if the button is clicked first, then subsequent clicks will fix 'messy' paints by the QThread signal (sorry, that's confusing...
QtWarning QMetaObject::connectSlotsByName: No matching signal for on_something_event() Search with Google I found a post that explained, very clearly, what happens. I'd bet it's somewhere in the documentation of Qt, but so far I have not found anything about that in the event sections I...
error.///PLATFORM NOTES///Win32 - On Win32, the WIN32 symbol must be #defined. Most mainstream//compilers do this by default, but you may need to define it//yourself if your build environment is less standard. This causes//the Win32 thread support to be compiled in and used automatic...
// have their own mutex/critical section. In practice, this means that // mutex collisions (and hence context switches) only happen if they are // absolutely essential. However, on some platforms, creating a lot of // mutexes can slow down the whole OS, so use this option with care. ...
buttonOk =newQPushButton(this,"buttonOk"); buttonOk->setText( tr("&OK") ); buttonOk->setAutoDefault( TRUE ); buttonOk->setDefault( TRUE ); Layout1->addWidget( buttonOk ); buttonCancel =newQPushButton(this,"buttonCancel");
So far we've created a window and added a simplepush buttonwidget to it, but the button doesn't do anything. That's not very useful at all -- when you create GUI applications you typically want them to do something! What we need is a way to connect the action ofpressing the button...
So far we've created a window and added a simple push button widget to it, but the button doesn't do anything. That's not very useful at all -- when you create GUI applications you typically want them to do something! What we need is a way to connect the action of pressing the ...