在QCalendarWidget弹出窗口打开时发出信号?

时间:2019-04-15 09:52:09

标签: python pyqt pyqt5 qcalendarwidget

这是一个函数,它绘制一些以前计算并保存在“日期”列表中的日期的单元格,该函数工作正常,但是我想在单击QDateEdit时调用该函数(显示弹出日历时)

updateEvents(hidePrice) {

    $('#test_calendar').fullCalendar({
        ...
        viewRender:  (view, element) => {  // convert to arrow function so, this (component instance) will be accessible inside.
        // store the reference of this (component instance).
        const $this = this;

        $("#months-tab").on("change", function (e) {
          ...
          // always bind methods in constructor.
          $this.handleChange(e);
          ...
        });
      },
        ...
    });
}
  

self.dockwidget.date_from()#QDateEdit

     

self.dockwidget.date_from.calendarWidget()#QCalendarWidget

我知道有信号,但是当单击QDate时它们都可以工作: self.dockwidget.date_to.calendarWidget()。activated.connect(self.paint_cell) self.dockwidget.date_to.calendarWidget()。clicked.connect(self.paint_cell)self.dockwidget.date_to.calendarWidget()。selectionChanged.connect(self.paint_cell)

但是当显示弹出窗口时,我必须在这些信号之前绘制单元格。

有人知道那是什么信号吗?

enter image description here

注意:代码将成为QGis插件的一部分

2 个答案:

答案 0 :(得分:2)

如果要在显示calendarWidget之前进行设置,则无需使用任何信号,只需在构造函数中调用paint_cell。

# constructor
self.paint_cell()
self.dockwidget.date_to.calendarWidget().activated.connect(self.paint_cell)
# ...

更新

在这种情况下没有默认信号,因此请相信它,您可以使用事件过滤器监视Event.Show事件,然后发出信号。

from PyQt5 import QtCore, QtWidgets


class DateEdit(QtWidgets.QDateEdit):
    popupSignal = QtCore.pyqtSignal()

    def __init__(self, parent=None):
        super(DateEdit, self).__init__(parent)
        self.setCalendarPopup(True)
        self.calendarWidget().installEventFilter(self)

    def eventFilter(self, obj, event):
        if self.calendarWidget() is obj and event.type() == QtCore.QEvent.Show:
            self.popupSignal.emit()
        return super(DateEdit, self).eventFilter(obj, event)


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = DateEdit()
    w.popupSignal.connect(lambda: print("popup"))
    w.show()
    sys.exit(app.exec_())

答案 1 :(得分:0)

有@eyllanesc帖子的提示,我现在的工作代码是:

class Project(QDockWidget):
    """ QGIS Plugin Implementation. """
    popupSignal = QtCore.pyqtSignal()

    def __init__(self, iface):
        """ Constructor.

        :param iface: An interface instance that will be passed to this class
        which provides the hook by which you can manipulate the QGIS
        application at run time.
        :type iface: QgisInterface
        """
        QDockWidget.__init__(self)

        # Save reference to the QGIS interface
        self.iface = iface

        # initialize plugin directory
        self.plugin_dir = os.path.dirname(__file__)

        ...

    def eventFilter(self, obj, event):
        if self.dockwidget.date_to.calendarWidget() is obj and event.type() == QtCore.QEvent.Show:
            self.popupSignal.emit()
        return super(Project, self).eventFilter(obj, event)

    ....

    def run(self):
       """ Run method that loads and starts the plugin """

           self.dockwidget.date_to.calendarWidget().installEventFilter(self)
           self.popupSignal.connect(self.paint_cell)


    def paint_cell(self):
        #QDateEdit / QCalendarWidget Highlight Dates
        keyword_format = QTextCharFormat()
        keyword_format.setBackground(Qt.gray)
        for date in dates:
             self.dockwidget.date_from.calendarWidget().setDateTextFormat(QDate.fromString(date, "yyyy-MM-dd"), keyword_format)