qml滚轮事件

qml;文件

 

import QtQuick 2.0

TextInput {

    property alias placeholderText: placeText.text

    clip: true

    //inputMask: "99.99"//

    Text {

        id: placeText

        color: "#323232"

        anchors.verticalCenter: parent.verticalCenter

        anchors.left: parent.left

        anchors.leftMargin: 5

        visible: parent.text.length == 0

    }

    MouseArea {

        anchors.fill: parent

        enabled: parent.focus

        onWheel: {

            var datl = wheel.angleDelta.y/120;//一刻滚轮代表正负120度，所以除以120等于1或者-1

          if(datl>0){

              text=(parseFloat(text)+0.1).toFixed(2);//parseFloat转换为浮点

          }else{

              text=(parseFloat(text)-0.1).toFixed(2);//toFixed(2)保留两位小数点

          }

        }

    }

}