Doesn't see popup menu on combobox - qt

Question

I'm trying to set a new style to comboBox in qml and get in trouble my combobox doesn't want to show me drop-down list everything else is fine, here is code
The code I took from Internet
T.ComboBox {
id: _comboBox
anchors.bottom: _borderedTextboxPoints.top
anchors.horizontalCenter: _borderedTextboxPoints.horizontalCenter
anchors.bottomMargin: 10
delegate: T.ItemDelegate { //! Changing style of items in list
width: _comboBox.width
contentItem: Text {
text: modelData
color: "black"
font: _comboBox.font
elide: Text.ElideRight
verticalAlignment: Text.AlignVCenter
}
highlighted: _comboBox.highlightedIndex === index
}
indicator: Canvas { //! Changing style of indicator
id: canvas
x: _comboBox.width - width - _comboBox.rightPadding - 5
y: _comboBox.topPadding + (_comboBox.availableHeight - height) / 2
width: 12
height: 8
contextType: "2d"
Connections { //! Changing style on pressed
target: _comboBox
function onPressedChanged() { canvas.requestPaint(); }
}
onPaint: {
context.reset();
context.moveTo(0, 0);
context.lineTo(width, 0);
context.lineTo(width / 2, height);
context.closePath();
context.fillStyle = _comboBox.pressed ? "#722ed1" : "#531dab";
context.fill();
}
}
contentItem: Text {
leftPadding: 5
rightPadding: _comboBox.indicator.width + _comboBox.spacing
text: _comboBox.displayText
font: _comboBox.font
color: "black"
verticalAlignment: Text.AlignVCenter
elide: Text.ElideRight
}
background: Rectangle {
implicitWidth: 120
implicitHeight: 40
border.color: _comboBox.pressed ? "#2f54eb" : "#1d39c4"
border.width: _comboBox.visualFocus ? 2 : 1
radius: 10
}
popup: T.Popup { //! Changing style of drop-down list
y: _comboBox.height - 1
width: _comboBox.width
implicitHeight: contentItem.implicitHeight
padding: 1
contentItem: ListView {
clip: true
implicitHeight: contentHeight
model:_comboBox.popup.visible ? _comboBox.delegateModel : null
currentIndex: _comboBox.highlightedIndex
T.ScrollIndicator.vertical: T.ScrollIndicator { }
}
}
}
That's look like this

Answer 1

In the popup code add a z and use an index higher than 1
popup: T.Popup { //! Changing style of drop-down list
...
padding: 1
z: 4
...
I used 4 as the z, here because I knew 4 will definitely work. But maybe 2 too would have worked.
This usually happens when you are showing the combo box in a popup.