如何跟据C++信号动态改变qml 中Listview的一个或几个delegate的颜色 - QTCN开发网

ListView {
                    id: bTList
                    width: 50 * dpi
                    height: 40 * dpi
                    currentIndex: -1
                    anchors.left: parent.left
                    anchors.leftMargin: 3 * dpi
                    anchors.top: blueToothServicecolumn.top
                    anchors.topMargin: 6 * dpi
                    clip: true
                    spacing: 2 * dpi
                    model: device.devicesList
                    focus: true

                    delegate: Rectangle {
                        id: delegate
                        property string temperagunconnected: device.TemperagunConnected
                        property string bloodressureconnected: device.BloodpressureConnected
                        property string bdoxygenconnected: device.BDoxygenConnected
                        property string bdsugarconnected: device.BDsugarConnected
                        color: ListView.isCurrentItem ? "lightblue" : "green" // directly change properties depending on isCurrentItem
                        width: 50 * dpi
                        height: 8 * dpi

                        states: State {
                            name: "maximized"
                            when: delegate.ListView.isCurrentItem // bind to isCurrentItem to set the state
                            PropertyChanges {
                                target: delegate
                                height: 200
                            }
                        }
                        MouseArea {
                            anchors.fill: parent
                            //onClicked: delegate.ListView.view.currentIndex = model.index // if only selection is wanted
                            onClicked: {
                                //console.debug("click");
                                device.bindservices(modelData.deviceName, modelData.deviceAddress);

                            }
                        }
                        Image {
                            id: bticon
                            source: "images/BT.png";
                            width: btNameText.height;
                            height: btNameText.height;
                            anchors.top: parent.top
                            anchors.left: parent.left
                            anchors.margins: 0.3 * dpi
                        }
                        Text {
                            id: btNameText
                            text: modelData.deviceName
                            anchors.left: bticon.right
                            anchors.leftMargin: 0.3 * dpi
                            //color: white
                            font.family: "微软雅黑"
                            font.pointSize: 20
                        }
}
}