尝试为日期单元格上色时出现问题

Question

我在使用QT Designer中创建的日历并通过pyuic 4转换后，试图在其选择选择后重新为日期单元格上色时遇到了一些问题。

到目前为止，我已经看到了一些关于重新着色单元格或行表/树小部件的类似问题-但这些例子源于扩展基础QCalendarWidget或tree小部件类在代码中实例化之前…而我使用QT设计器放置日历小部件通过pyuic转换，并在转换后的python脚本中实例化。

这里是我的窗口主文件的一个例子，我试图改变使用QCalendarWidget的paintCell函数的日期选择的颜色:

import os, sys
from PyQt4 import QtCore, QtGui
from calanderTestWindow import Ui_calanderTestWindow
class Main(QtGui.QMainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.ui = Ui_calanderTestWindow()
        self.ui.setupUi(self)
        self.conncectSignals()
    def conncectSignals(self):
        QtCore.QObject.connect(self.ui.testCalander, QtCore.SIGNAL('selectionChanged()'), self.clickDate)
    def clickDate(self):
        painter = QtGui.QPainter()
        painter.setPen(QtGui.QColor(0,255,255))
        date = self.ui.testCalander.selectedDate()
        cellRect = QtCore.QRect(0,0,10,10)
        self.ui.testCalander.paintCell(painter, cellRect, date)

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = Main()
    window.show()
    sys.exit(app.exec_())

，这里是公共转换Qt Designer脚本:

from PyQt4 import QtCore, QtGui
try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    _fromUtf8 = lambda s: s
class Ui_calanderTestWindow(object):
    def setupUi(self, calanderTestWindow):
        calanderTestWindow.setObjectName(_fromUtf8("calanderTestWindow"))
        calanderTestWindow.resize(262, 203)
        calanderTestWindow.setWindowTitle(QtGui.QApplication.translate("calanderTestWindow", "Calendar Test Window", None, QtGui.QApplication.UnicodeUTF8))
        self.centralwidget = QtGui.QWidget(calanderTestWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.testCalander = QtGui.QCalendarWidget(self.centralwidget)
        self.testCalander.setGeometry(QtCore.QRect(0, 0, 256, 155))
        self.testCalander.setGridVisible(True)
        self.testCalander.setVerticalHeaderFormat(QtGui.QCalendarWidget.NoVerticalHeader)
        self.testCalander.setNavigationBarVisible(True)
        self.testCalander.setObjectName(_fromUtf8("testCalander"))
        calanderTestWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(calanderTestWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 262, 21))
        self.menubar.setObjectName(_fromUtf8("menubar"))
        calanderTestWindow.setMenuBar(self.menubar)
        self.statusbar = QtGui.QStatusBar(calanderTestWindow)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        calanderTestWindow.setStatusBar(self.statusbar)
        self.retranslateUi(calanderTestWindow)
        QtCore.QMetaObject.connectSlotsByName(calanderTestWindow)
    def retranslateUi(self, calanderTestWindow):
        pass

当我运行这个时，我得到以下日志消息，几乎告诉我出了什么问题:

QPainter::setPen: Painter not active
QPainter::save: Painter not active
QPainter::setClipRect: Painter not active
QPainter::brushOrigin: Painter not active
QPainter::setBrushOrigin: Painter not active
QPainter::setBrushOrigin: Painter not active
QPainter::setPen: Painter not active
QPainter::pen: Painter not active
QPainter::save: Painter not active
QPainter::setBackgroundMode: Painter not active
QPainter::setBrush: Painter not active
QPainter::setBrushOrigin: Painter not active
QPainter::setPen: Painter not active
QPainter::drawRects: Painter not active
QPainter::drawRects: Painter not active
QPainter::drawRects: Painter not active
QPainter::drawRects: Painter not active
QPainter::restore: Unbalanced save/restore
QPainter::restore: Unbalanced save/restore

我是你可能认为的初级程序员(…)(或者更少)——我在Autodesk Maya中有很多python和一点QT的经验，有技术美术的背景——但在核心OOP原则方面可能不够。非常愿意学习。

Answer 1

我不知道你是否已经找到了这个问题的答案日历小部件在显示所选日期方面做得并不多，但在选择日期方面做得更多。我认为，它还在寻找qwidget当前使用的paint类。

但是您可以重新实现QCalendarWidget并覆盖paintCell调用来为您显示选定的日期

from PyQt4 import QtCore, QtGui
class dateCalendar(QtGui.QCalendarWidget)
    def __init__(self, parent = None):
        super(calendar, self).__init__(parent)
        self.color = QtGui.QColor(self.palette().color(QtGui.QPalette.Highlight))
        self.color.setAlpha(150)
        #self.selectionChanged.connect(self.updateCells)
        self.dateList = []
    def paintCell(self, painter, rect, date):
        #calling original paintCell to draw the actual calendar
        QtGui.QCalendarWidget.paintCell(self, painter, rect, date)
        #highlight a particular date
        if date in self.dateList:
            painter.fillRect(rect, self.color)
    def selectDates(self, qdatesList):
        self.dateList = qdatesList
        #this redraws the calendar with your updated date list
        self.updateCells()

虽然现在你需要手动编码到你的小部件，而不是在Qt设计器中使用它(除非你想把它变成一个插件)

如果你还没有解决，希望这对你有帮助。

class widget(QtGui.QWidget):
    def __init__(self, parent = None):
        super(empty, self).__init__(parent)
        self.setGeometry(300, 300, 280, 170)
        #no layout
        self.cal = calendar(self)
        self.but = QtGui.QPushButton("Push", self)
        self.but.clicked.connect(self.addDate)
    def addDate(self):
        self.cal.selectDates([QtCore.QDate(2012,10,8), QtCore.QDate(2012,10,5)])