你永远也无法预料到,Qt到底埋了多少坑(我的是PyQt5),
一个破文本居中都要搞那么麻烦
一堆样式这里不生效那里不生效的真的是离谱
代码+运行结果:
import sys
from PyQt5.QtWidgets import QApplication,QComboBox
from PyQt5.QtWidgets import QStyle,QStylePainter,QStyleOptionComboBox,QStyleOptionButton
from PyQt5.QtGui import QPalette,QPainter
from PyQt5.QtCore import Qt__all__=['XJQ_ComboBox']
class XJQ_ComboBox(QComboBox):cbStyle='''QComboBox{font-size:20px;background:rgba(96,192,255,192);border-radius:10px;min-width:50px;text-align:center;}QComboBox::drop-down{width:0;image:none;}QComboBox QAbstractItemView {font-size:25px;min-width: 50px;font-weight:0;font-family:serif;background-color: rgba(224, 224, 128, 255);}QComboBox QAbstractItemView::item {height: 30px;background-color: rgba(237, 0, 0,128);}QComboBox QScrollBar{background: rgba(255,255,255,5%);width: 5px;}QComboBox QScrollBar::add-line {width:0;height:0;}QComboBox QScrollBar::sub-line {width:0;height:0;}QComboBox QScrollBar::handle {background: rgba(64,64,64,75%);}QComboBox QScrollBar::sub-page {background: rgba(0,0,0,30%);}QComboBox QScrollBar::add-page {background: rgba(0,0,0,30%);}'''def __init__(self,*args):super().__init__(*args)self.setCursor(Qt.PointingHandCursor)#样式QComboBox QAbstractItemView{...}要调用QComboBox.setView后生效:https://blog.csdn.net/Larry_Yanan/article/details/123556429self.setView(QListView())self.setStyleSheet(self.cbStyle)self.setFocusPolicy(Qt.NoFocus)def paintEvent(self,event):#组合框文字居中:https://blog.csdn.net/eiilpux17/article/details/109501871painter=QStylePainter(self)painter.setPen(self.palette().color(QPalette.Text));opt=QStyleOptionComboBox();self.initStyleOption(opt);painter.drawComplexControl(QStyle.CC_ComboBox, opt);if (self.currentIndex() < 0):opt.palette.setBrush(QPalette.ButtonText, opt.palette.brush(QPalette.ButtonText).color().lighter());painter.end();painter2 =QPainter(self);buttonOpt=QStyleOptionButton();buttonOpt.initFrom(self)editRect = self.style().subControlRect(QStyle.CC_ComboBox, opt, QStyle.SC_ComboBoxEditField, self);buttonOpt.rect = editRect;buttonOpt.text = opt.currentText;self.style().drawControl(QStyle.CE_PushButtonLabel, buttonOpt, painter2, self);def addItem(self,tx):#列表项居中:https://blog.csdn.net/chenxipu123/article/details/87804513super().addItem(tx)self.model().item(cb.count()-1).setTextAlignment(Qt.AlignCenter)if __name__ == '__main__':from PyQt5.QtWidgets import QWidget,QHBoxLayout,QListViewapp = QApplication(sys.argv)cb=XJQ_ComboBox()for i in range(200):cb.addItem(str(i))cb.currentTextChanged.connect(lambda val:print(val))cb.setCurrentText('105')wid=QWidget()hbox=QHBoxLayout(wid)hbox.addStretch(1)hbox.addWidget(cb)hbox.addStretch(1)wid.show()sys.exit(app.exec_())
碎碎念
坑多到让人发麻,真的是让人两眼一黑。
频繁出现“样式表无法生效”造成不少样式出现了交错的情况,也就是部分样式是通过setStyleSheet
修改的但又有部分样式是通过setFont
、setTextAlignment
、setBackground
之类的函数进行设置,
而且有些样式还必须设置某些东西才会生效(例如QComboBox QAbstractItemView{...}
的样式要生效就必须调用QComboBox.setView(QListView())
),想想都头皮发麻,
几度有过走别的路子的想法,例如自己从头实现组合框(QLineEdit
+QListView
),要不就是新增绘制代理QItemDelegate
,但,算了,写都写完了,不管那么多。
参考:
- 自定义QComboBox下拉框,右对齐显示,下拉列表滑动操作:https://blog.csdn.net/chenxipu123/article/details/87804513
- QT有关QCobobox控件的样式设置(圆角、下拉框,向上展开、可编辑、内部布局等):https://blog.csdn.net/Larry_Yanan/article/details/123556429
- QComboBox文字居中的一种解决办法:https://blog.csdn.net/eiilpux17/article/details/109501871
- QComboBox设置文字居中:https://www.cnblogs.com/hades-zhang/articles/16717490.html
- QComboBox设置复杂下拉列表:https://blog.csdn.net/wzz953200463/article/details/113926045
- Qt样式表手册Qt Style Sheets Reference:https://doc.qt.io/qt-6/stylesheet-reference.html#placeholder-text-color-prop
未经本人同意不得私自转载,本文发布于CSDN:https://blog.csdn.net/weixin_44733774/article/details/135272673