Problem with binding in QML

msauer75

Hello,

I have a QML textedit element, which get the value from my C++ programm with a Q_PROPERTY

    Q_PROPERTY(gc::data::IntDecorator                       *ui_filterRadius        MEMBER  FilterRadius        CONSTANT)

I have the following code in my QML form:

Item {
    property IntDecorator radius
    property int widthValue
    property bool setWidthValue
    property int radiusValue

    id: koordFilterRoot

    Row {
        width: parent.width
        spacing: Style.spacingRow*2

        Flow {
            width: parent.width

            Rectangle {
                id: labelRadius
                Text {
                    id: textRadius
                    anchors {
                        fill: parent
                    }
                    text: radius.ui_label
                    verticalAlignment: Qt.AlignVCenter
                }
            }

            Rectangle {
                id: labelTeRadius
                TextEdit {
                    id: textEditRadius
                    anchors {
                        fill: parent
                    }
                    text: radius.ui_value
                    color: Style.colourDataSelectorFont
                    font.pixelSize: Style.pixelSizeDataControls
                    verticalAlignment: Qt.AlignVCenter
                   onEditingFinished: radiusValue = textEditRadius.text
                }
            }
        }
    }

    Binding {
        target: radius
        property: "ui_value"
        value: radiusValue
    }
}

After loading of the form, the value of radius.ui_value = 0, although the member is in my constructor initalized with 20. I don't have any idea if the value will be set to 0, if I add the binding block?
Can you help me with this problem?

Thank you
BR
martin

sierdzio

Doesn't that work?

property IntDecorator radius: radiusValue

BTW. your property definition is wrong. See the docs. From the code you have pasted here, your property name is ui_filterRadius and not radiusValue you use in QML.

Also BTW. to use a property in QML, you need to also specify the object (unless you added radiusValue as root context property).

msauer75

Hi,

thank you for your help. That works. I have to set the init value.

BR
martin