Question

我正在尝试使用GUI - 我希望有滚动条和标签。我用滚动条作为最外面的＆＃34;＆＃34; widget，内置QTabWidget，反之亦然：QTabWidget有一个QWidget选项卡，QScrollArea的父选项卡是选项卡。简而言之，我无法扩展滚动区域以填充可用空间。下面有一些评论说明了我尝试过的所有内容。没有调整sizePolicies似乎有帮助。我查看了其他人发布的类似问题，特别是Issue with scrollarea in pyqt?

# -*- coding: utf-8 -*-
"""
Created on Fri Nov 17 07:07:08 2017

@author: Erik
"""

import sys
from PyQt5.QtWidgets import QLayout, QVBoxLayout ,QTabWidget, QMainWindow,QApplication, QWidget, QSizePolicy, QScrollArea
from PyQt5.QtGui import QColor, QPalette
from PyQt5.QtCore import QSize
class Color2(QWidget):

    def __init__(self, color, *args, **kwargs):
        super(Color2, self).__init__(*args, **kwargs)
        self.setAutoFillBackground(True)
        palette = self.palette()
        palette.setColor(QPalette.Window, QColor(color))
        self.setPalette(palette)
        self.setSizePolicy(QSizePolicy(QSizePolicy.Maximum, QSizePolicy.Maximum))

    def sizeHint(self):
        return QSize(250,150)

class MyTableWidget(QWidget):
    def __init__(self, parent):   
        super(QWidget, self).__init__(parent)
        self.layout = QVBoxLayout(self)
        # Initialize tab screen
        self.tabs = QTabWidget(self)      
        self.layout.addWidget(self.tabs)
        #self.setSizePolicy(QSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored))
        #self.tabs.setSizePolicy(QSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored))

    def addTab(self, widget, text):
        self.tabs.addTab(widget, text)
        widget.setAutoFillBackground(True)
        my_yellow = QColor.fromHsl(35, 255, 153, 128 )
        dark_blue = QColor.fromHsl(211, 196, 38, 255)
        widget.palette().setColor(QPalette.Window, dark_blue)
        widget.palette().setColor(QPalette.WindowText, my_yellow)

class Example(QMainWindow):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):               

        self.statusBar().showMessage('Ready')
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Statusbar')
        self.table_widget = MyTableWidget(self)
        self.tab1 = QWidget()        
        self.tab2 = QWidget()
        #self.tab1.setSizePolicy(QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding))
        self.table_widget.addTab(self.tab1, "Tab1")
        self.table_widget.addTab(self.tab2, "Tab2")

        self.scrollArea = QScrollArea(self.tab1)
        #self.scrollArea = QScrollArea(self)
        self.scrollArea.setWidgetResizable(True)
        self.scrollAreaWidgetContents = QWidget(self.scrollArea)
        #self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 380, 247))
        self.scrollAreaWidgetContents.setMinimumSize(QSize(1100, 1300))
        #self.scrollAreaWidgetContents.setSizePolicy(QSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored))
        #self.scrollAreaWidgetContents.setWidgetResizable(True)
        #self.scrollArea.setWidget(self.scrollAreaWidgetContents)

        self.verticalLayout = QVBoxLayout(self.scrollAreaWidgetContents)
        #self.verticalLayout.addWidget(self.scrollArea)
        self.verticalLayout.addWidget(Color2('blue'))
        self.verticalLayout.addWidget(Color2('red'))
        self.verticalLayout.insertStretch(-1)
        #self.verticalLayout.setSizeConstraint(1)#QLayout.SizeConstraint.setNoConstraint)
        self.verticallayout2 = QVBoxLayout(self.tab2)
        self.verticallayout2.addWidget(Color2('green'))

        #self.scrollArea.setSizePolicy(QSizePolicy(QSizePolicy.Ignored, QSizePolicy.Expanding))
        self.scrollArea.setWidget(self.scrollAreaWidgetContents)

        self.setCentralWidget(self.table_widget)
        self.show()
        print(self.table_widget.minimumSizeHint())

if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

我从http://zetcode.com/gui/pyqt5/学到了基础知识。此外，上述代码行为的一个线索是QScrollArea实际使用的区域与sizeHint类的Color2有某种关联。我有一个滚动条的例子，它们自己工作得很好......这只是他们在QTabWidget的标签中将它们放在我不明白的行为中。有小费吗？非常感谢。

Answer 1

问题是您没有使用布局在选项卡内设置QScrollArea。当您确定一个窗口小部件是另一个窗口小部件的父节点时，您只是指示子节点的坐标系相对于父节点，而不是它将占用父节点的大小，因此您必须使用布局，因为它处理大小

# -*- coding: utf-8 -*-
"""
Created on Fri Nov 17 07:07:08 2017

@author: Erik
"""

import sys
from PyQt5.QtWidgets import QLayout, QVBoxLayout ,QTabWidget, QMainWindow,QApplication, QWidget, QSizePolicy, QScrollArea
from PyQt5.QtGui import QColor, QPalette
from PyQt5.QtCore import QSize

class Color2(QWidget):
    def __init__(self, color, *args, **kwargs):
        super(Color2, self).__init__(*args, **kwargs)
        self.setAutoFillBackground(True)
        palette = self.palette()
        palette.setColor(QPalette.Window, QColor(color))
        self.setPalette(palette)
        self.setSizePolicy(QSizePolicy(QSizePolicy.Maximum, QSizePolicy.Maximum))

    def minimumSizeHint(self):
        return QSize(250,150)

class MyTableWidget(QWidget):
    def __init__(self, parent):   
        super(QWidget, self).__init__(parent)
        self.layout = QVBoxLayout(self)
        self.tabs = QTabWidget(self)      
        self.layout.addWidget(self.tabs)

    def addTab(self, widget, text):
        self.tabs.addTab(widget, text)
        widget.setAutoFillBackground(True)
        my_yellow = QColor.fromHsl(35, 255, 153, 128 )
        dark_blue = QColor.fromHsl(211, 196, 38, 255)
        widget.palette().setColor(QPalette.Window, dark_blue)
        widget.palette().setColor(QPalette.WindowText, my_yellow)

class Example(QMainWindow):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):               

        self.statusBar().showMessage('Ready')
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Statusbar')
        self.table_widget = MyTableWidget(self)
        self.tab1 = QWidget()        
        self.tab2 = QWidget()
        self.table_widget.addTab(self.tab1, "Tab1")
        self.table_widget.addTab(self.tab2, "Tab2")
        lay = QVBoxLayout(self.tab1)

        self.scrollArea = QScrollArea()
        lay.addWidget(self.scrollArea)
        self.scrollArea.setWidgetResizable(True)
        self.scrollAreaWidgetContents = QWidget()
        self.scrollArea.setWidget(self.scrollAreaWidgetContents)

        self.verticalLayout = QVBoxLayout(self.scrollAreaWidgetContents)
        self.verticalLayout.addWidget(Color2('blue'))
        self.verticalLayout.addWidget(Color2('red'))
        self.verticalLayout.insertStretch(-1)
        self.verticallayout2 = QVBoxLayout(self.tab2)
        self.verticallayout2.addWidget(Color2('green'))

        self.scrollArea.setWidget(self.scrollAreaWidgetContents)

        self.setCentralWidget(self.table_widget)
        self.show()

if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

pyqt5选项卡区域未填充整个可用空间

1 个答案: