python - python调整Qpainter的大小

我试图更改我的Qpainter的大小，但我无法弄清楚有人可以在这里帮助我查看我的代码，因为我需要的代码已嵌入其他代码中，不需要谢谢您的帮助。

import sys
import os
from PyQt4.QtCore import QSize, QTimer
from PyQt4.QtGui import QApplication,QGraphicsRectItem , QMainWindow, QPushButton, QWidget, QIcon, QLabel, QPainter, QPixmap, QMessageBox, QAction, QKeySequence, QFont, QFontMetrics, QMovie
from PyQt4 import QtGui


class UIWindow(QWidget):
    def __init__(self, parent=None):
        super(UIWindow, self).__init__(parent)
        self.resize(QSize(400, 450))

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.drawPixmap(self.rect(), QPixmap("Images\Image.png"))
        painter.move(0,0)
        painter.resize(950,270)




class MainWindow(QMainWindow,):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setGeometry(490, 200, 950, 620)
        self.setFixedSize(950, 620)
        self.startUIWindow()
        self.setWindowIcon(QtGui.QIcon('Images\Logo.png'))

    def startUIWindow(self):
        self.Window = UIWindow(self)
        self.setWindowTitle("pythonw")
        self.setCentralWidget(self.Window)
        self.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MainWindow()
    sys.exit(app.exec_())

最佳答案

drawPixmap函数需要将要绘制矩形的矩形作为第一个参数，即（0、0，宽度，高度）

def paintEvent(self, event):
    painter = QPainter(self)
    pixmap = QPixmap("Images\Image.png")
    painter.drawPixmap(QRect(0, 0, pixmap.width(), pixmap.height()), pixmap)

完整的代码：

import sys
import os
from PyQt4.QtCore import QSize, QTimer, QRect
from PyQt4.QtGui import QApplication,QGraphicsRectItem , QMainWindow, QPushButton, QWidget, QIcon, QLabel, QPainter, QPixmap, QMessageBox, QAction, QKeySequence, QFont, QFontMetrics, QMovie
from PyQt4 import QtGui


class UIWindow(QWidget):
    def __init__(self, parent=None):
        super(UIWindow, self).__init__(parent)
        self.resize(QSize(400, 450))

    def paintEvent(self, event):
        painter = QPainter(self)
        pixmap = QPixmap("Images\Image.png")
        painter.drawPixmap(QRect(0, 0, pixmap.width(), pixmap.height()), pixmap)


class MainWindow(QMainWindow,):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setGeometry(490, 200, 950, 620)
        self.setFixedSize(950, 620)
        self.startUIWindow()

    def startUIWindow(self):
        self.Window = UIWindow(self)
        self.setWindowTitle("pythonw")
        self.setCentralWidget(self.Window)
        self.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MainWindow()
    sys.exit(app.exec_())