Как в QML обновить календарь?

Добрый день.
Так сделал календарь.
После нажатия на число в календаре, меняется в коде расцветка, в которую должны быть окрашенны делегаты календаря. Но видимая расцветка не меняется, календарь не обновляется. Такое обновление не срабатывает:

                    mothGrid1.update()
                    model.update()

Скажите пожалуйста, как обновить календарь?

    MonthGrid {
        id: mothGrid1
        month: 7//Calendar.December
        year: 2019
        x: 23
        y: 154
        width: 340
        height: 355
        //locale: Qt.locale("en_US")

        delegate: Item {
            Rectangle{
                id: rectangleDelegat
                anchors.fill: parent
                //color: AppCore.getVectorDate().includes(model.day + "." + (model.month +1 ) + "." + model.year ) || AppCore.getVectorDate().includes(model.day + "." + 0+(model.month +1 ) + "." + model.year ) ?  "gainsboro" : "white"
                //color: model.date >= Date.fromLocaleString(Qt.locale(), AppCore.getDateOypr1(), "dd.MM.yyyy") && model.date <= Date.fromLocaleString(Qt.locale(), AppCore.getDateOypr2(), "dd.MM.yyyy") ? model.date ===  Date.fromLocaleString(Qt.locale(), AppCore.getDateOypr1(), "dd.MM.yyyy") /*||  model.date == Date.fromLocaleString(Qt.locale(), AppCore.getDateOypr2(), "dd.MM.yyyy")*/ ? "blue" : "gainsboro" : "white"
                border.color: "black"
                border.width: 1
                color: AppCore.getColorRectangleCalendar(Qt.formatDate(model.date,"dd.MM.yyyy"))
            }
            Text {
                id: textDelegat
                //color: AppCore.getVectorDate().includes(model.day + "." + (model.month +1 ) + "." + model.year ) || AppCore.getVectorDate().includes(model.day + "." + 0+(model.month +1 ) + "." + model.year ) ?  "black" : "gainsboro"
                color: AppCore.getColorTextCalendar(Qt.formatDate(model.date,"dd.MM.yyyy"))
                anchors.horizontalCenter: parent.horizontalCenter
                anchors.verticalCenter: parent.verticalCenter
                text: model.day
                font.weight: Font.ExtraLight
            }

            MouseArea{
                anchors.fill: parent
                onClicked: {
                    rectangleDelegat.color = "blue"
                    textDelegat.color = "white"
                    //console.log(model.day + "." + (model.month +1 ) + "." + model.year )
                    //console.log(numberEnterDate)
                    numberEnterDate++
                    if(numberEnterDate === 1 && model.model.month < 10) {AppCore.setDateOypr1(model.day + "." + 0 + (model.month +1 ) + "." + model.year )}
                    if(numberEnterDate === 1 && model.model.month >= 10) {AppCore.setDateOypr1(model.day + "." + (model.month +1 ) + "." + model.year )}
                    if(numberEnterDate >= 2 && model.model.month < 10) {
                        if(date >= Date.fromLocaleString(Qt.locale(), AppCore.getDateOypr1(), "dd.MM.yyyy")){
                        AppCore.setDateOypr2(model.day + "." + 0 + (model.month +1 ) + "." + model.year )
                        }
                        else{
                            AppCore.date2RavnoDate1()
                            AppCore.setDateOypr1(model.day + "." + 0 + (model.month +1 ) + "." + model.year )
                        }
                        loader.source = "FirstWindow.qml"
                    }
                    if(numberEnterDate >= 2 && model.model.month >= 10) {
                        if(date >= Date.fromLocaleString(Qt.locale(), AppCore.getDateOypr1(), "dd.MM.yyyy")){
                            AppCore.setDateOypr2(model.day + "." + (model.month +1 ) + "." + model.year )
                        }
                        else{
                            AppCore.date2RavnoDate1()
                            AppCore.setDateOypr1(model.day + "." + (model.month +1 ) + "." + model.year )
                        }
                        loader.source = "FirstWindow.qml"
                    }
                    mothGrid1.update()
                    model.update()
                }
            }
        }
    }