Problem with custom TextBox

[Lucijan]

Hello,
I've made a TextBox that can be flicked and it works fine except for one small issue that I don't know how to resolve. Whenever I try to increase the width of the window, the text's width won't follow, but it will update as soon as I decrease the width of the window even if I've increased the width before that.

Here's the code:

TextBox.qml

@import QtQuick 2.0

Rectangle {
id: textBox
width: 500
height: 300
color: "#1a4381"
border.color: "#ffffff"
clip: true

property alias text: boxText.text
property alias fontPixelSize: boxText.font.pixelSize
property alias fontFamily: boxText.font.family

Flickable {
    id: textFlick
    contentWidth: parent.width
    contentHeight: boxText.height
    clip: true

    flickableDirection: Flickable.VerticalFlick

    anchors.fill: parent

    Text {
        id: boxText
        height: paintedHeight+4
        text: ""
        font.pixelSize: 16
        font.family: "Arial"
        color: "#ffffff"
        wrapMode: Text.WordWrap
        anchors.left: parent.left
        anchors.leftMargin: 2
        anchors.right: parent.right
        anchors.rightMargin: 2
        textFormat: Text.RichText
    }
}

}
@

And a sample main.qml:

@import QtQuick 2.0

Rectangle
{
width: 200
height: 200
color: "grey"

TextBox {
    anchors.fill: parent
    text: "aaaaaaa aaaaaaaaa aaaaaaaaaaaaa aaaaaaaaaaaaaa aaaaaaa"
}

}@

[Lucijan]

This seems to be a problem with the textFormat property of Text being set to Text.RichText. I don't quite understand why this happens though.

As a workaround I am using TextEdit instead of Text because it works fine there.