python - 我可以自定义自己的笔刷样式吗？

Question

这里有一些为Qbrush预定义的QbrushStyle，我想知道我是否有机会按照自己的意愿定制一个风格。谢谢。

Answer 1

您必须创建一个表示图案的 QPixmap，并将其设置为 QBrush 的纹理:

import sys

from PyQt5 import QtCore, QtGui, QtWidgets


def create_texture():
    pixmap = QtGui.QPixmap(QtCore.QSize(8, 8))
    pixmap.fill(QtGui.QColor("red"))

    painter = QtGui.QPainter(pixmap)
    painter.setBrush(QtGui.QBrush(QtGui.QColor("blue")))
    painter.drawEllipse(pixmap.rect())
    painter.end()

    return pixmap


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)

    texture = create_texture()
    brush = QtGui.QBrush()
    brush.setTexture(texture)

    scene = QtWidgets.QGraphicsScene()
    view = QtWidgets.QGraphicsView(scene)

    it = scene.addRect(QtCore.QRectF(0, 0, 400, 400))
    it.setBrush(brush)

    view.resize(640, 480)
    view.show()

    sys.exit(app.exec_())

或QImage:

import sys

from PyQt5 import QtCore, QtGui, QtWidgets


def create_texture():
    image = QtGui.QImage(QtCore.QSize(8, 8), QtGui.QImage.Format_ARGB32)
    image.fill(QtGui.QColor("red"))

    painter = QtGui.QPainter(image)
    painter.setBrush(QtGui.QBrush(QtGui.QColor("blue")))
    painter.drawEllipse(image.rect())
    painter.end()

    return image


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)

    texture = create_texture()
    brush = QtGui.QBrush()
    brush.setTextureImage(texture)

    scene = QtWidgets.QGraphicsScene()
    view = QtWidgets.QGraphicsView(scene)

    it = scene.addRect(QtCore.QRectF(0, 0, 400, 400))
    it.setBrush(brush)

    view.resize(640, 480)
    view.show()

    sys.exit(app.exec_())