是否可以将 C++ 小部件嵌入到 PyQt 应用程序中?

我有一个 PyQt5 应用程序和大多数用 Python 编写的小部件.我想在 C++ Qt 中编写一些小部件以使其更快，然后将其嵌入到我的 PyQt QMainWindow 中.

有可能吗?

解决方案

您可以使用 SIP 来执行从 python 中用 C++ 创建的小部件，在以下

I have a PyQt5 application and most widgets written in Python. I want to write some widget in C++ Qt to make it faster and then embed it into my PyQt QMainWindow.

Is it possible?

解决方案

You can use SIP to be able to execute a widget created in C ++ from python, in the following link I show an example of how to do it.

The structure of the example is as follows:

├── configure.py
├── sip
│?? ├── AnalogClock.sip
│?? └── PyAnalogClock.sip
└── src
    ├── analogclock.cpp
    ├── analogclock.h
    ├── analogclockl_global.h
    └── AnalogClock.pro

In the src folder you must create the widget library

In the sip folder you must place the structure of the class that you will expose:

AnalogClock.sip

%Import QtGui/QtGuimod.sip
%Import QtWidgets/QtWidgetsmod.sip

%If (Qt_5_0_0 -)

class AnalogClock : public QWidget{

%TypeHeaderCode
#include "analogclock.h"
%End

public:
    AnalogClock(QWidget *parent /TransferThis/ = 0);

protected:
    virtual void resizeEvent(QResizeEvent *);
    virtual void paintEvent(QPaintEvent *e); 
};

%End

PyAnalogClock.sip

%Module(name=PyAnalogClock, call_super_init=True, keyword_arguments="Optional")
%DefaultMetatype PyQt5.QtCore.pyqtWrapperType
%DefaultSupertype sip.simplewrapper
%Include AnalogClock.sip

configure.py is the script that configures the compilation of the project, if you have any problems you must modify some path (it has been tested in Linux)

It is then compiled by executing the following:

python configure.py
make 
sudo make install

When executing the previous one it generates a folder called modules, inside of it is the dynamic library, in the case of the example PyAnalogClock.so, this file we place it in the folder of the source code:

.
├── main.py
└── PyAnalogClock.so

main.py

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyAnalogClock import AnalogClock

if __name__=="__main__":
    import sys

    a=QApplication(sys.argv)
    w=AnalogClock()
    w.show()
    sys.exit(a.exec_())

output: