问题描述
我在处理以下程序的布局时遇到问题。我想将 QHBoxLayout 插入 QVBoxLayout 的第一行（或任何一行）。目标是实现这样的目标：
这是我目前所拥有的：
import sys,os
from PyQt5.QtWidgets import *
from PyQt5.QtWebEngineWidgets import QWebEngineView
from PyQt5.QtGui import *
from PyQt5.QtCore import *
class MainWindow(QMainWindow):
def __init__(self,*args,**kwargs):
super(MainWindow,self).__init__(*args,**kwargs)
self.setFixedSize(600,600)
layout = QVBoxLayout()
layout.setContentsMargins(0,0)
layout.setAlignment(Qt.AlignLeft | Qt.AlignTop)
self.webEngineView = QWebEngineView()
self.loadPage()
self.webEngineView.setFixedSize(QSize(600,280))
layout.addWidget(self.webEngineView)
button = QPushButton("CLICK",self)
button.setFixedSize(QSize(50,80))
button.clicked.connect(self.clickme)
button.setStyleSheet("""
background-color: red;
""")
layout.addWidget(button)
# without this part the code works fine:
titlelayout = QHBoxLayout()
titlelayout.setContentsMargins(0,0)
titlelayout.setAlignment(Qt.AlignRight | Qt.AlignTop)
button1 = QPushButton("CLICK",self)
button1.setFixedSize(QSize(40,40))
titlelayout.addWidget(button1)
titlelayout.addLayout(layout)
widget = QWidget()
widget.setLayout(layout)
self.setCentralWidget(widget)
def loadPage(self):
html = '''
<html style="width: 100%; height: 100%; margin: 0; padding: 0;">
<body style="overflow: hidden; width: 100%; height: 100%; margin: 0; padding: 0; background-color: #E6E6FA;">
</body>
</html>'''
self.webEngineView.setHtml(html)
def clickme(self):
print("clicked")
app = QApplication(sys.argv)
app.setStyleSheet("QMainWindow {background-color:white}")
window = MainWindow()
window.show()
sys.exit(app.exec_())
解决方法
在我的设计中，我不喜欢将布局放置在另一个布局中，而是使用 QWidget 作为容器作为中介：
import sys
from PyQt5.QtCore import QSize,Qt
from PyQt5.QtWidgets import (
QApplication,QGridLayout,QHBoxLayout,QLineEdit,QMainWindow,QPushButton,QVBoxLayout,QWidget,)
from PyQt5.QtWebEngineWidgets import QWebEngineView
class MainWindow(QMainWindow):
def __init__(self,*args,**kwargs):
super(MainWindow,self).__init__(*args,**kwargs)
self.setFixedSize(600,600)
self.webEngineView = QWebEngineView()
button1 = QPushButton("CLICK")
button1.setFixedSize(QSize(50,80))
button1.setStyleSheet("""background-color: red;""")
button1.clicked.connect(self.clickme)
button2 = QPushButton("CLICK")
button2.setFixedSize(QSize(50,80))
button3 = QPushButton("CLICK")
button3.setFixedSize(QSize(50,80))
title_widget = QWidget()
hlay = QHBoxLayout(title_widget)
hlay.addWidget(button1,alignment=Qt.AlignLeft)
hlay.addStretch()
hlay.addWidget(button2,alignment=Qt.AlignRight)
hlay.addWidget(button3,alignment=Qt.AlignRight)
footer_widget = QWidget()
hlay2 = QGridLayout(footer_widget)
hlay2.addWidget(QPushButton("Foo"),0)
hlay2.addWidget(QLineEdit("Bar"),1,2)
central_widget = QWidget()
self.setCentralWidget(central_widget)
vlayout = QVBoxLayout(central_widget)
vlayout.addWidget(title_widget)
vlayout.addWidget(self.webEngineView,stretch=1)
vlayout.addWidget(footer_widget)
self.loadPage()
def loadPage(self):
html = """
<html style="width: 100%; height: 100%; margin: 0; padding: 0;">
<body style="overflow: hidden; width: 100%; height: 100%; margin: 0; padding: 0; background-color: #E6E6FA;">
</body>
</html>"""
self.webEngineView.setHtml(html)
def clickme(self):
print("clicked")
app = QApplication(sys.argv)
app.setStyleSheet("QMainWindow {background-color:white}")
window = MainWindow()
window.show()
sys.exit(app.exec_())
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