QML TypeError: Property 'xx' of object yy is not a function - qt

Question

I have this main.qml:
import QtQuick 2.13
import QtQuick.Window 2.13
import QtQuick.Controls 2.5
ApplicationWindow {
...
Item {
// This Item is to provide needed properties for functionality in the original app that was elided out in this example.
// It was left in in case it's relevant to the problem.
...
Column {
...
Text {
text: qsTr("Masked text")
SlidingMask {
id: testMask
anchors.fill: parent
...
}
}
Row {
Button {
id: btnRevealText
text: qsTr("Reveal")
...
}
Button {
id: btnHideText
text: qsTr("Hide")
...
}
}
}
}
Connections {
target: btnRevealText
onPressed: testMask.reveal()
}
Connections {
target: btnHideText
onPressed: testMask.hide()
}
}
And this SlidingMask.qml that's registered in the qml.qrc:
import QtQuick 2.0
Rectangle {
...
function hide() {
...
}
function reveal() {
...
}
}
When I run the app and try to press the buttons, I get the following errors:
TypeError: Property 'hide' of object SlidingMask_QMLTYPE_7(0x19991132c50) is not a function
TypeError: Property 'reveal' of object SlidingMask_QMLTYPE_7(0x19991132c50) is not a function
However, if I try changing the Connections to alter a property of the SlidingMask instead of calling a function, it works fine.
I've also tested this component previously and didn't run into any problems then, although I wasn't using Connections in that test.
I've searched here and on Google for an answer, but nothing I've found seems relevant to my situation. How would I fix this?

Answer 1

Here is a simple example which works properly:
//main.qml
ApplicationWindow {
id: window
width: 640
height: 480
visible: true
Column{
ItemWithFunction{
id: sc
width: 100
height: 100
}
Button{
id: btn1
text: 'Test Connection'
}
}
Connections{
target: btn1
onPressed: sc.testFunction();
}
}
//ItemWithFunction.qml
Rectangle{
color: 'red'
function testFunction(){
console.log("SOMETHING HAPPENED")
}
}
It seems that you are not putting your functions in SlidingMask root but in one of its child components.