PyQt5-在MainWindow布局的背景中添加图像 | 在MainWindow布局的背景中添加图像

本文介绍了PyQt5-在MainWindow布局的背景中添加图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

PyQt5的新手...这是一个非常基本的问题.

New to PyQt5... Here is a very basic question.

我想在小部件的布局内添加图像.这个小部件是我的应用程序的主窗口/根小部件.我使用以下代码，但收到错误消息.

I would like to add an image inside the layout of a widget. This widget is the Main Window / root widget of my application. I use the following code, but I get an error message.

import sys

from PyQt5.QtGui import QImage
from PyQt5.QtWidgets import *

class MainWindow(QWidget):

    def __init__(self):

       super().__init__()

       self.setGeometry(300,300,300,220)
       self.setWindowTitle("Hello !")

       oImage = QImage("backgound.png")

       oLayout = QVBoxLayout()
       oLayout.addWidget(oImage)

       self.setLayout(oLayout)

       self.show()

if __name__ == "__main__":

    app = QApplication(sys.argv)

    oMainwindow = MainWindow()

    sys.exit(app.exec_())


TypeError: QBoxLayout.addWidget(QWidget, int stretch=0, Qt.Alignment alignment=0): argument 1 has unexpected type 'QImage'

显然，QLayoutWidget不接受QImage作为输入.是否有解决方法，使图像在QWidget中显示为背景?

Apparently a QLayoutWidget does not accept a QImage as an input. Is there a workaround to have an image appear as a brackground in a QWidget ?

推荐答案

文档QVBoxLayout

QImage不是小部件.

在许多小部件上，例如QmainWindow，QLabel您可以使用

on many widgets e.g. QmainWindow, QLabel you can use

widget.setStyleSheet(„ background-image: url(backgound.png);")

在我的计算机上，这不适用于QWidget.在这种情况下，您可以使用以下代码重写:

on my machine this doesn't work with QWidget. In this case you can use the following rewrite of your code:

import sys
from PyQt5.QtCore import QSize
from PyQt5.QtGui import QImage, QPalette, QBrush
from PyQt5.QtWidgets import *

class MainWindow(QWidget):
    def __init__(self):
       QWidget.__init__(self)
       self.setGeometry(100,100,300,200)

       oImage = QImage("test.png")
       sImage = oImage.scaled(QSize(300,200))                   # resize Image to widgets size
       palette = QPalette()
       palette.setBrush(QPalette.Window, QBrush(sImage))
       self.setPalette(palette)

       self.label = QLabel('Test', self)                        # test, if it's really backgroundimage
       self.label.setGeometry(50,50,200,50)

       self.show()

if __name__ == "__main__":

    app = QApplication(sys.argv)
    oMainwindow = MainWindow()
    sys.exit(app.exec_())

这篇关于PyQt5-在MainWindow布局的背景中添加图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！