python - pyqt5 tabwidget 垂直制表符水平文本左对齐

Question

因为 pyqt 在垂直选项卡选项中没有水平文本，所以我遵循了这个 link让它发生。我想在左侧有图标，然后在图标后显示文本，并为选定的选项卡文本、非事件选项卡文本设置不同的颜色。下面的代码几乎完成了。唯一的问题是文本对齐居中。我尝试更改 tabRect.center() 但将其更改为 left 和 top 或 right 等使其崩溃。

我从this link得到的注释代码让我左对齐，但它没有我添加的图标。但是我无法更改非事件标签的文本颜色。

我是 python 的新手，我找不到解决方案。我也试过了link但这只会设置背景颜色。也尝试使用此选项 setTabTextColor link但由于某种原因它没有用。从 2 天开始一​​直在尝试。

每当我尝试使用带有注释代码的样式表设置文本颜色时，“颜色”选项在样式表中不起作用。关于如何完成这项工作的任何想法？谢谢

from PyQt5 import QtCore, QtGui, QtWidgets

class TabBar(QtWidgets.QTabBar):
    def tabSizeHint(self, index):
        s = QtWidgets.QTabBar.tabSizeHint(self, index)
        s.transpose()
        return s

    def paintEvent(self, event):
        painter = QtWidgets.QStylePainter(self)
        opt = QtWidgets.QStyleOptionTab()

        for i in range(self.count()):
            self.initStyleOption(opt, i)
            painter.drawControl(QtWidgets.QStyle.CE_TabBarTabShape, opt)
            painter.save()

            s = opt.rect.size()
            s.transpose()
            r = QtCore.QRect(QtCore.QPoint(), s)
            r.moveCenter(opt.rect.center())
            opt.rect = r

            c = self.tabRect(i).center()
            painter.translate(c)
            painter.rotate(90)
            painter.translate(-c)
            painter.drawControl(QtWidgets.QStyle.CE_TabBarTabLabel, opt)
            painter.restore()

        # for i in range(self.count()):
        #     self.initStyleOption(opt, i)
        #     c = self.tabRect(i)
        #     c.moveLeft(35)
        #     painter.drawControl(QtWidgets.QStyle.CE_TabBarTabShape, opt)
        #     # painter.setPen(QColor(255, 255, 255))
        #     painter.drawText(c, QtCore.Qt.AlignVCenter | QtCore.Qt.TextDontClip, self.tabText(i))
        #     if i == 0:
        #         painter.drawImage(QtCore.QRectF(8, 8, 20, 20), QtGui.QImage("images/logo.png"))
        #     if i == 1:
        #         painter.drawImage(QtCore.QRectF(8, 44, 20, 20), QtGui.QImage("images/data.png"))
        #     if i == 2:
        #         painter.drawImage(QtCore.QRectF(8, 82, 20, 20), QtGui.QImage("images/browse.png"))
        #     if i == 3:
        #         painter.drawImage(QtCore.QRectF(8, 120, 20, 20), QtGui.QImage("images/off.png"))
        #     if i == 4:
        #         painter.drawImage(QtCore.QRectF(8, 158, 20, 20), QtGui.QImage("images/cal.png"))
        #     if i == 5:
        #         painter.drawImage(QtCore.QRectF(8, 196, 20, 20), QtGui.QImage("images/fol.png"))
        #     if i == 6:
        #         painter.drawImage(QtCore.QRectF(8, 232, 20, 20), QtGui.QImage("images/exc.png"))
        # painter.end()


class TabWidget(QtWidgets.QTabWidget):
    def __init__(self, *args, **kwargs):
        QtWidgets.QTabWidget.__init__(self, *args, **kwargs)
        self.setTabBar(TabBar(self))
        self.setTabPosition(QtWidgets.QTabWidget.West)

Answer 1

解决方案是使用QProxyStyle 来重定向文本绘制:

from PyQt5 import QtCore, QtGui, QtWidgets


class TabBar(QtWidgets.QTabBar):
    def tabSizeHint(self, index):
        s = QtWidgets.QTabBar.tabSizeHint(self, index)
        s.transpose()
        return s

    def paintEvent(self, event):
        painter = QtWidgets.QStylePainter(self)
        opt = QtWidgets.QStyleOptionTab()

        for i in range(self.count()):
            self.initStyleOption(opt, i)
            painter.drawControl(QtWidgets.QStyle.CE_TabBarTabShape, opt)
            painter.save()

            s = opt.rect.size()
            s.transpose()
            r = QtCore.QRect(QtCore.QPoint(), s)
            r.moveCenter(opt.rect.center())
            opt.rect = r

            c = self.tabRect(i).center()
            painter.translate(c)
            painter.rotate(90)
            painter.translate(-c)
            painter.drawControl(QtWidgets.QStyle.CE_TabBarTabLabel, opt);
            painter.restore()


class TabWidget(QtWidgets.QTabWidget):
    def __init__(self, *args, **kwargs):
        QtWidgets.QTabWidget.__init__(self, *args, **kwargs)
        self.setTabBar(TabBar(self))
        self.setTabPosition(QtWidgets.QTabWidget.West)

class ProxyStyle(QtWidgets.QProxyStyle):
    def drawControl(self, element, opt, painter, widget):
        if element == QtWidgets.QStyle.CE_TabBarTabLabel:
            ic = self.pixelMetric(QtWidgets.QStyle.PM_TabBarIconSize)
            r = QtCore.QRect(opt.rect)
            w =  0 if opt.icon.isNull() else opt.rect.width() + self.pixelMetric(QtWidgets.QStyle.PM_TabBarIconSize)
            r.setHeight(opt.fontMetrics.width(opt.text) + w)
            r.moveBottom(opt.rect.bottom())
            opt.rect = r
        QtWidgets.QProxyStyle.drawControl(self, element, opt, painter, widget)

if __name__ == '__main__':
    import sys

    app = QtWidgets.QApplication(sys.argv)
    QtWidgets.QApplication.setStyle(ProxyStyle())
    w = TabWidget()
    w.addTab(QtWidgets.QWidget(), QtGui.QIcon("zoom.png"), "ABC")
    w.addTab(QtWidgets.QWidget(), QtGui.QIcon("zoom-in.png"), "ABCDEFGH")
    w.addTab(QtWidgets.QWidget(), QtGui.QIcon("zoom-out.png"), "XYZ")

    w.resize(640, 480)
    w.show()

    sys.exit(app.exec_())