在窗口调整大小时动态调整QTabWidget的大小

Question

我正在尝试根据窗口框架的大小动态调整标签的大小。最初，该程序在全屏模式下打开，并采用屏幕的宽度/高度分辨率以使标签之间的间距均匀。这可以正常工作。如果我最小化窗口，它也会动态地正确调整大小，但是如果我尝试在之后最大化或调整窗口大小，它将不会动态调整。

我正在使用resizeEvent()和pyqtSignal()来检测何时调整窗口大小。我将此插槽与一个函数相连，以使用frameGeometry()获取窗口的尺寸，然后设置新选项卡的宽度和高度。但是在初始调整大小之后，它似乎并没有改变。我该如何解决？

from PyQt4 import QtCore, QtGui
import base64
import sys

def exit_application():
    """Exit program event handler"""

    sys.exit(1)

class HorizontalTabBar(QtGui.QTabBar):
    def __init__(self, width, height, width_ratio=6, height_ratio=20, tabs=6, parent=None):
        super(HorizontalTabBar, self).__init__(parent)

        self.tabs = tabs
        self.width_ratio = self.tabs 
        self.height_ratio = height_ratio
        self.width = width/self.width_ratio
        self.height = height/self.height_ratio

    def tabSizeHint(self, index):
        return QtCore.QSize(self.width, self.height)

    def paintEvent(self, event):
        painter = QtGui.QStylePainter(self)
        tab_options = QtGui.QStyleOptionTab()

        for tab in range(self.count()):
            self.initStyleOption(tab_options, tab)
            painter.drawControl(QtGui.QStyle.CE_TabBarTabShape, tab_options)
            painter.save()

            size = tab_options.rect.size()
            size.transpose()

            center = self.tabRect(tab).center()
            painter.translate(center)
            painter.rotate(0)
            painter.translate(-center)
            painter.drawControl(QtGui.QStyle.CE_TabBarTabLabel, tab_options);
            painter.restore()

    def set_new_tab_dimensions(self, width, height):
        self.width = width/self.width_ratio
        self.height = height/self.height_ratio

class TabWidget(QtGui.QTabWidget):
    resized = QtCore.pyqtSignal()
    def __init__(self, *args, **kwargs):
        QtGui.QTabWidget.__init__(self)
        self.horizontal_tab_bar = HorizontalTabBar(kwargs.pop('width'), kwargs.pop('height'))
        self.setTabBar(self.horizontal_tab_bar)
        self.setTabPosition(QtGui.QTabWidget.South)
        self.setTabShape(QtGui.QTabWidget.Rounded)

    def resizeEvent(self, event):
        self.resized.emit()
        screen_width = self.frameGeometry().width()
        screen_height = self.frameGeometry().height()
        print(screen_height, screen_width)
        self.horizontal_tab_bar.set_new_tab_dimensions(screen_width, screen_height)
        return super(TabWidget, self).resizeEvent(event)

class AdvancedTab(QtGui.QWidget):
    def __init__(self, parent=None):
        super(AdvancedTab, self).__init__(parent)

        self.setWindowModality(QtCore.Qt.ApplicationModal)
        self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
        self.advanced_tab_locked_init()
        self.advanced_tab_unlocked_init()

        self.advanced_tab_layout = QtGui.QGridLayout()

        # Two layouts: locked and unlocked
        # 0 - locked
        # 1 - unlocked
        self.advanced_tab_page_switch = QtGui.QStackedWidget()
        self.advanced_tab_page_switch.addWidget(self.advanced_tab_locked)
        self.advanced_tab_page_switch.addWidget(self.advanced_tab_unlocked)
        self.advanced_tab_page_switch.setCurrentIndex(1)
        self.advanced_tab_layout.addWidget(self.advanced_tab_page_switch,0,0,alignment=QtCore.Qt.AlignLeft)

    def advanced_tab_locked_init(self):
        """Advanced tab lock screen"""

        self.advanced_tab_locked = QtGui.QWidget()

        self.advanced_tab_locked_layout = QtGui.QVBoxLayout()
        self.test = QtGui.QLabel('sdds')
        self.advanced_tab_locked_layout.addWidget(self.test)

        self.advanced_tab_locked.setLayout(self.advanced_tab_locked_layout)

    def advanced_tab_unlocked_init(self):
        self.advanced_tab_unlocked = QtGui.QWidget()
        self.advanced_tab_unlocked_layout = QtGui.QGridLayout()

        for i in range(1,10):
            for j in range(1,10):
                self.advanced_tab_unlocked_layout.addWidget(QtGui.QPushButton("B"+str(i)+str(j)),i,j)

        self.advanced_tab_unlocked.setLayout(self.advanced_tab_unlocked_layout)

    def get_advanced_tab_layout(self):
        return self.advanced_tab_layout

if __name__ == '__main__':

    # Create main application window
    app = QtGui.QApplication(sys.argv)
    app.setStyleSheet('QWidget {font-size:18px}')
    app.setStyle(QtGui.QStyleFactory.create("Cleanlooks"))

    mw = QtGui.QMainWindow()
    # mw.setWindowFlags(QtCore.Qt.FramelessWindowHint)
    mw.showMaximized()

    screen_height = QtGui.QApplication.desktop().screenGeometry().height()
    screen_width = QtGui.QApplication.desktop().screenGeometry().width()

    main_window_tab = TabWidget(width=screen_width, height=screen_height, tabs=6)

    operation_one_tab = QtGui.QWidget()
    advanced_tab = QtGui.QWidget()
    operation_three_tab = QtGui.QWidget()
    configuration_tab = QtGui.QWidget()
    diagnostic_tab = QtGui.QWidget()
    data_tab = QtGui.QWidget()

    advanced_tab_widget = AdvancedTab()

    # Main window tab layout
    advanced_tab.setLayout(advanced_tab_widget.get_advanced_tab_layout())

    main_window_tab.addTab(advanced_tab, "Operation 2")
    main_window_tab.addTab(operation_one_tab, "Operation 1")
    main_window_tab.addTab(operation_three_tab, "Operation 3")
    main_window_tab.addTab(configuration_tab, "Configuration")
    main_window_tab.addTab(diagnostic_tab, "Diagnostic")
    main_window_tab.addTab(data_tab, "Data")

    mw.setCentralWidget(main_window_tab)
    mw.show()

    QtGui.QShortcut(QtGui.QKeySequence('Ctrl+Q'), main_window_tab, exit_application)

    sys.exit(app.exec_())

Answer 1

解决方法是手动更改resizeEvent中的样式表。

from PyQt4 import QtCore, QtGui
import base64
import sys

def exit_application():
    """Exit program event handler"""

    sys.exit(1)

class HorizontalTabBar(QtGui.QTabBar):
    def __init__(self, parent=None):
        super(HorizontalTabBar, self).__init__(parent)

    def paintEvent(self, event):
        painter = QtGui.QStylePainter(self)
        tab_options = QtGui.QStyleOptionTab()
        for tab in range(self.count()):
            self.initStyleOption(tab_options, tab)
            painter.drawControl(QtGui.QStyle.CE_TabBarTabShape, tab_options)
            painter.save()

            size = tab_options.rect.size()
            size.transpose()

            center = self.tabRect(tab).center()
            painter.translate(center)
            painter.rotate(0)
            painter.translate(-center)
            painter.drawControl(QtGui.QStyle.CE_TabBarTabLabel, tab_options)
            painter.restore()

class TabWidget(QtGui.QTabWidget):
    def __init__(self, tabs):
        QtGui.QTabWidget.__init__(self)

        self.width_ratio = tabs
        self.height_ratio = 20

        self.horizontal_tab_bar = HorizontalTabBar()
        self.setTabBar(self.horizontal_tab_bar)
        self.setTabPosition(QtGui.QTabWidget.South)
        self.setTabShape(QtGui.QTabWidget.Rounded)

    def resizeEvent(self, event):
        self.screen_width = self.frameGeometry().width()/self.width_ratio
        self.screen_height = self.frameGeometry().height()/self.height_ratio

        self.setStyleSheet("QTabBar::tab { width: %d px; height: %d px;}" % (self.screen_width, self.screen_height))
        return super(TabWidget, self).resizeEvent(event)

class AdvancedTab(QtGui.QWidget):
    def __init__(self, parent=None):
        super(AdvancedTab, self).__init__(parent)

        self.setWindowModality(QtCore.Qt.ApplicationModal)
        self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
        self.advanced_tab_locked_init()
        self.advanced_tab_unlocked_init()

        self.advanced_tab_layout = QtGui.QGridLayout()

        # Two layouts: locked and unlocked
        # 0 - locked
        # 1 - unlocked
        self.advanced_tab_page_switch = QtGui.QStackedWidget()
        self.advanced_tab_page_switch.addWidget(self.advanced_tab_locked)
        self.advanced_tab_page_switch.addWidget(self.advanced_tab_unlocked)
        self.advanced_tab_page_switch.setCurrentIndex(1)
        self.advanced_tab_layout.addWidget(self.advanced_tab_page_switch,0,0,alignment=QtCore.Qt.AlignLeft)

    def advanced_tab_locked_init(self):
        """Advanced tab lock screen"""

        self.advanced_tab_locked = QtGui.QWidget()

        self.advanced_tab_locked_layout = QtGui.QVBoxLayout()
        self.test = QtGui.QLabel('sdds')
        self.advanced_tab_locked_layout.addWidget(self.test)

        self.advanced_tab_locked.setLayout(self.advanced_tab_locked_layout)

    def advanced_tab_unlocked_init(self):
        self.advanced_tab_unlocked = QtGui.QWidget()
        self.advanced_tab_unlocked_layout = QtGui.QGridLayout()

        for i in range(1,10):
            for j in range(1,10):
                self.advanced_tab_unlocked_layout.addWidget(QtGui.QPushButton("B"+str(i)+str(j)),i,j)

        self.advanced_tab_unlocked.setLayout(self.advanced_tab_unlocked_layout)

    def get_advanced_tab_layout(self):
        return self.advanced_tab_layout

if __name__ == '__main__':

    # Create main application window
    app = QtGui.QApplication(sys.argv)
    app.setStyleSheet('QWidget {font-size:18px}')
    app.setStyle(QtGui.QStyleFactory.create("Cleanlooks"))

    mw = QtGui.QMainWindow()
    # mw.setWindowFlags(QtCore.Qt.FramelessWindowHint)
    mw.showMaximized()

    main_window_tab = TabWidget(tabs=6)

    operation_one_tab = QtGui.QWidget()
    advanced_tab = QtGui.QWidget()
    operation_three_tab = QtGui.QWidget()
    configuration_tab = QtGui.QWidget()
    diagnostic_tab = QtGui.QWidget()
    data_tab = QtGui.QWidget()

    advanced_tab_widget = AdvancedTab()

    # Main window tab layout
    advanced_tab.setLayout(advanced_tab_widget.get_advanced_tab_layout())

    main_window_tab.addTab(advanced_tab, "Operation 2")
    main_window_tab.addTab(operation_one_tab, "Operation 1")
    main_window_tab.addTab(operation_three_tab, "Operation 3")
    main_window_tab.addTab(configuration_tab, "Configuration")
    main_window_tab.addTab(diagnostic_tab, "Diagnostic")
    main_window_tab.addTab(data_tab, "Data")

    mw.setCentralWidget(main_window_tab)
    mw.show()

    QtGui.QShortcut(QtGui.QKeySequence('Ctrl+Q'), main_window_tab, exit_application)

    sys.exit(app.exec_())