python - 尝试为日期单元格着色时出现问题

Question

我在尝试使用在 QT Designer 中创建并通过 pyuic 4 转换的日历对日期单元格进行选择后重新着色时遇到一些问题。

到目前为止，我已经看到了一些关于重新着色单元格或表格/树小部件行的类似问题 - 但这些示例源于在代码中实例化之前扩展基本 QCalendarWidget 或 Tree 小部件类...而我使用的是 QT设计器放置了通过 pyuic 转换的日历小部件，并在转换后的 python 脚本中实例化。

这是我的窗口主文件的示例，其中我尝试使用 QCalendarWidget 的 PaintCell 函数更改日期选择的颜色:

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_())

这是 puic 转换的 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

当我运行这个程序时，我收到以下日志消息，这些消息几乎告诉我出了问题:

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编码员(..或更少) - 我在 Autodesk Maya 中拥有丰富的 Python 经验和一点 QT 经验，并且拥有技术艺术背景 - 但可能还不够核心 OOP 原则的背景。不过非常愿意学习。

Answer 1

我不知道你是否已经找到了这个问题的答案，但这里是日历小部件实际上并没有太多用于显示所选日期，但更多的是用于选择日期。我认为它也在寻找 qwidget 当前正在使用的绘制类。

但是您可以重新实现 QCalendarWidget 并覆盖 PaintCell 调用以显示所选日期

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()

尽管现在您需要将其手动编码到您的小部件中，而不是在 Qt Designer 中使用它(除非您想将其变成插件)

如果您从未解决过这个问题，希望对您有所帮助。

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)])