使用pyqt5生成SVG文件 [英] Generate a SVG file with pyqt5

问题描述

我想使用pyqt5使用Python绘制一些简单的矢量图像.

I want to use pyqt5 to draw some simple vectorial images using Python.

到目前为止，我已经设法使用以下代码生成图像:

So far, I've managed to generate an image with the following code:

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *


class MyPainter(QImage):
    def __init__(self):
        super().__init__(400, 400, QImage.Format_RGB32)
        self.fill(Qt.black)
        painter = QPainter(self)
        painter.setPen(QPen(Qt.red, 8))
        painter.drawRect(40, 40, 200, 100)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    w = MyPainter()
    w.save('test.png', 'PNG')

绘制以下图像:

除了绘制SVG外，我想做同样的事情.

I want to do the same thing but rendering a SVG.

pyqt5.qtsvg模块可以吗?如何将其插入上面的代码中?我只是找不到任何例子.

Is it possible with pyqt5.qtsvg module? How would it be inserted in the code above? I just can't find any example.

推荐答案

我终于找到了解决方案:

I finally found the solution:

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtSvg import *

if __name__ == "__main__":
    generator = QSvgGenerator()
    generator.setFileName("test.svg")
    generator.setSize(QSize(400, 400))
    generator.setViewBox(QRect(0, 0, 400, 400))
    painter = QPainter(generator)
    painter.fillRect(QRect(0, 0, 400, 400), Qt.black)
    painter.setPen(QPen(Qt.red, 8))
    painter.drawRect(40, 40, 200, 100)
    painter.end()

QtSvg实际上提供了一个生成器，该生成器被用作QPainter()的参数.

QtSvg actually provides a generator which that is taken as an argument to the QPainter().

此外，我想做的是比使用无用的类更好的脚本"方式.

Also, what I want to do is better in a "script" way than using a useless class.

我也不需要QApplication，只需要绘画过程，就可以大大加快该过程.

I also don't need a QApplication, only the painting process, which accelerates the process quite much.

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