QML – Control border width and color on any one side of Rectangle element

You can make a custom border element like this :

CustomBorder.qml

import QtQuick 1.0

Rectangle
{

    property bool commonBorder : true

    property int lBorderwidth : 1
    property int rBorderwidth : 1
    property int tBorderwidth : 1
    property int bBorderwidth : 1

    property int commonBorderWidth : 1

    z : -1

    property string borderColor : "white"

    color: borderColor

    anchors
    {
        left: parent.left
        right: parent.right
        top: parent.top
        bottom: parent.bottom

        topMargin    : commonBorder ? -commonBorderWidth : -tBorderwidth
        bottomMargin : commonBorder ? -commonBorderWidth : -bBorderwidth
        leftMargin   : commonBorder ? -commonBorderWidth : -lBorderwidth
        rightMargin  : commonBorder ? -commonBorderWidth : -rBorderwidth
    }
}

main.qml

import QtQuick 1.0

Rectangle
{
    width:  500
    height: 500
    color: "grey"

    Rectangle
    {
        anchors.centerIn: parent
        width : 300
        height: 300
        color: "pink"

        CustomBorder
        {
            commonBorderWidth: 3
            borderColor: "red"
        }
    }


    Rectangle
    {
        anchors.centerIn: parent
        width : 200
        height: 200
        color: "green"

        CustomBorder
        {
            commonBorder: false
            lBorderwidth: 10
            rBorderwidth: 0
            tBorderwidth: 0
            bBorderwidth: 0
            borderColor: "red"
        }
    }


    Rectangle
    {
        anchors.centerIn: parent
        width : 100
        height: 100
        color: "yellow"

        CustomBorder
        {
            commonBorder: false
            lBorderwidth: 0
            rBorderwidth: 0
            tBorderwidth: 10
            bBorderwidth: 10
            borderColor: "blue"
        }
    }

}

In this example I have used the custom element to make different rectangles which have border on all, one or two sides.