QML : Drop-down menu that opens upward - qt

Question

I need to have drop-down that opens upwards on clicking on Menu button in QML.
I have tried to use the listview for the same, but in the implementation we are getting drop-down which opens downwards.
Any suggestions with reference to below snippet.
import QtQuick 1.1
Rectangle {
width: 800
height: 480
Rectangle {
id:comboBox
property variant items: ["Red", "Blue", "Green"]
signal comboClicked;
x: 651
y: 344
width: 141
height: 30;
z: 0
smooth:true;
Rectangle {
id:chosenItem
radius:4;
width:parent.width;
height:comboBox.height;
color: "#454b4d"
smooth:true;
Text {
anchors.top: parent.top;
anchors.margins: 8;
id:chosenItemText
x: 11
y: 5
color: "#ffffff"
text:"Menu";
anchors.topMargin: 5
anchors.left: parent.left
anchors.leftMargin: 12
font.family: "Arial"
font.pointSize: 14;
smooth:true
}
MouseArea {
width: 400
height: 30
anchors.bottomMargin: 0
anchors.fill: parent;
onClicked: {
comboBox.state = comboBox.state==="dropDown"?"":"dropDown"
}
}
}
Rectangle {
id:dropDown
width:comboBox.width;
height:0;
clip:true;
radius:4;
anchors.top: chosenItem.bottom;
anchors.margins: 2;
color: "lightblue"
ListView {
id:listView
height:500;
model: comboBox.items
currentIndex: 0
delegate: Item{
width:comboBox.width;
height: comboBox.height;
Text {
text: modelData
anchors.top: parent.top;
anchors.left: parent.left;
anchors.margins: 5;
}
MouseArea {
anchors.fill: parent;
onClicked: {
comboBox.state = ""
chosenItemText.text = modelData;
listView.currentIndex = index;
}
}
}
}
}
states: State {
name: "dropDown";
PropertyChanges { target: dropDown; height:30*comboBox.items.length }
}
transitions: Transition {
NumberAnimation { target: dropDown; properties: "height"; easing.type: Easing.OutExpo; duration: 1000 }
}
}
}

Answer 1

Try to change the anchors of the dropDown item:
that
anchors.top: chosenItem.bottom;
should become
anchors.bottom: chosenItem.top;