mám python triedy s názvom Manažér a je zapísaná ako je tento :
backend = Manager()
engine = QQmlApplicationEngine()
engine.rootContext().setContextProperty("backend", backend)
aj v tejto triede (Manažér) mám majetku s názvom paramDs :
from PySide2.QtCore import QObject, Signal, Property, Slot
class Manager(QObject):
processResult = Signal(bool)
def __init__(self):
QObject.__init__(self)
self.ds = "loading .."
@Slot()
def start_processing(self):
self.set_ds("500")
def read_ds(self):
return self.ds
def set_ds(self, val):
self.ds = val
paramDs = Property(str, read_ds, set_ds)
aj v mojich program mám Zobrazenie Tabuľky :
import QtQuick 2.14
import Qt.labs.qmlmodels 1.0
TableView {
id:tb
anchors.fill: parent
columnSpacing: 1
rowSpacing: 1
clip: true
model: TableModel {
TableModelColumn { display: "param_name" }
TableModelColumn { display: "value" }
rows: [
{
"param_name": "Param",
"value": "Value"
},
{
"param_name": "number of classes",
"value": backend.paramDs
}
]
}
delegate: Rectangle {
implicitWidth: displayer.width + 50 <100 ? 100 :displayer.width+50
implicitHeight: 50
color : "#aa009688"
Text {
id:displayer
text: display
color : "white"
anchors.centerIn: parent
}
}
}
teraz niektoré kde v program pozývam, start_processing()
slot .
teraz paramDs by sa malo zmeniť v tabuľke pohľad z "loading .." k "500" ale zostalo staré "loading .." hodnotu.
prečo majetku nie aktualizujte si ho ja v program?