qml: 组件复用

在编写组件时,使用下面两种方法可以实现组件的复用:

import QtQuick 2.0
import QtQuick.Window 2.2
import QtQuick.Controls 1.4 as Controls
import Global 1.0
import "qrc:/materialUI/core"
Controls.ApplicationWindow {
    id: dg;
    width: Math.max(content.width+ 32,minimumWidth);
    height:  content.height + 32 +
                 buttonContraner.height + 16;
    visible:  false;
    default  property alias content: content.data;      //默认属性;
    property alias buttons: buttonView.children;        //引用;
    signal  rejected();

    property string nextButtonText: "下一步"
    property string negetiveButtonText: "取消"

    minimumWidth: 300;

    View{
        anchors.fill: parent;
        backgroundColor: "#ffffff"
        Item{
            id : contrainer;
             width: content.implicitWidth;
             height:  content.height;
             anchors{
                    left: parent.left;
                    right:  parent.right;
                    top: parent.top;
                    leftMargin: 16;
                    topMargin:  16;
                    rightMargin:  16;
              }


             Item{
                 id: flickItem;
                 clip: true;
                 anchors.fill: parent;
                 Column{
                     id: content;
                     spacing: Global.margin;
                }
             }
        }



        Item{
            id: buttonContraner;
            anchors{
                left: parent.left;
                right: parent.right;
                bottom: parent.bottom;
                bottomMargin: 8;
            }
            height: negetiveButton.implicitHeight + 8;
            clip: true;
            View{
                id: buttonView;

               // backgroundColor: dg.color;
                elevation: 0;
                fullWidth: true;
                elevationInverted:  true;
                anchors{
                    bottom: parent.bottom;
                    right:  parent.right;
                    left: parent.left;
                }
            }
        }
    }




    function open()
    {
        dg.visible = true;
    }
    function close()
    {
        dg.visible = false;
    }

    Component.onCompleted: {
        console.log(content.height + " " + buttonContraner.height )
    }
}

 

1. 默认属性;

  每一个qml组件仅有一个default  property属性。

        如上述代码; 通过申明默认属性,在使用该组件时,qml会自动将子成员对象插入到指定的位置;

2.引用;

      在上述代码中;

   property alias buttons: buttonView.children;   

     该表示即为引用,通过对buttons进行赋值,也能实现指定域扩展;

posted @ 2018-04-02 14:52  时光旅者  阅读(879)  评论(0编辑  收藏  举报