import QtQuick 2.0
import QtQuick.Controls 1.0
import QtQuick.Controls.Styles 1.1

Rectangle {
    width: 200
    height: 200

    SpinBox {
        value: 50
        anchors.centerIn: parent

        font {
            family: "Arial"
            pixelSize: 36
        }

        style: SpinBoxStyle {
            incrementControl: Rectangle {
                implicitHeight: control.height / 2
                implicitWidth: 36
                border {
                    color: "red"
                    width: 2
                }
            }

            decrementControl: Rectangle {
                implicitHeight: control.height / 2
                implicitWidth: 24
                border {
                    color: "blue"
                    width: 2
                }
            }
        }
    }
}