QML学习day1

main.qml

import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.5

Window {
    width: 640
    height: 480
    visible: true
    color:"blue"
    title: qsTr("Hello World")


    Button {//按钮
        id: btn1
        width: 50
        height: 50
        focus: true //聚焦当前按钮
        objectName: "btn1"

        background: Rectangle {//按钮外边框颜色
            border.color: btn1.focus ? "red" : "black"
        }
        onClicked: {//
            console.log("btn1 clicked")
        }
        Keys.onRightPressed: {//键盘右移键
            btn2.focus = true//聚焦于btn2.
        }

    }

    Button {
        id: btn2
        x:100
        width: 50
        height: 50
        objectName: "btn2"
        background: Rectangle {
            border.color: btn2.focus ? "red" : "black"
        }
        onClicked: {
            console.log("btn2 clicked")
        }
        Keys.onLeftPressed: {
            btn1.focus = true
        }
    onActiveFocusChanged: {//打印当前聚焦活动按钮。
        console.log("active focus item changed", activeFocusItem,"object name",activeFocusItemChanged)
    }
    }
}

运行结果: