QML: onDragStarted / finished not called even though the drag property is active - drag-and-drop

Question

In the following example I would expect that onDragStarted / onDragFinished are called when one rectangle is dragged. However only drag.onActiveChanged (of the mouseArea) and Drag.onActiveChanged (of the rectangle are called). I get the expected output when setting Drag.dragType to Drag.Automatic but then I don't see the rectangle anymore. I am using Qt 5.5 on a Mac (El Capitan).
import QtQuick 2.5
import QtQuick.Window 2.2
Window {
visible: true
width: 100
height: 200
ListModel {
id: testModel
ListElement { name: "red"; value: "#f00" }
ListElement { name: "green"; value: "#0f0" }
ListElement { name: "blue"; value: "#00f" }
}
Component {
id: rect
Rectangle {
Drag.active: mouseArea.drag.active
Drag.hotSpot.x: width / 2
Drag.hotSpot.y: height / 2
//Drag.dragType: Drag.Automatic
Drag.onActiveChanged: {
console.log("Active changed..")
}
Drag.onDragStarted: {
console.log("Drag started..")
}
Drag.onDragFinished: {
console.log("Drag finished!")
}
MouseArea {
id: mouseArea
anchors.fill: parent
hoverEnabled: true
drag.target: parent
drag.onActiveChanged: {
console.log("Drag prop became active..")
}
onClicked: {
colorButtonClicked(buttonName, buttonColor);
}
}
width: 80
height: 20
radius: 6
color: model.value
}
}
Column {
spacing: 3
anchors.centerIn: parent
Repeater {
model: testModel
delegate: rect
}
}
}

Answer 1

I was puzzled about the same problem based on my assumptions from the signal names, but a look at the documentation showed that the signals will only work when using Drag.Automatic or explicitly calling startDrag.
dragStarted()
This signal is emitted when a drag is started with the startDrag() method or when it is started automatically using the dragType property.
dragFinished(DropAction action)
This signal is emitted when a drag finishes and the drag was started with the startDrag() method or started automatically using the dragType property.
The other issue seen when using Drag.Automatic appears to be fixed in Qt 5.6.1