RTY 實踐出真知

// person.h
#ifndef PERSON_H
#define PERSON_H
#include <QObject>
#include <QDeclarativeListProperty>
#include <QList>
class Person : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QString name READ getName WRITE setName NOTIFY sendNameChange)
    Q_PROPERTY(int age READ getAge WRITE setAge NOTIFY sendAgeChange)
public:
    explicit Person(QObject *parent = 0);
    QString getName(void) const;
    void setName(const QString& name);
    int getAge(void);
    void setAge(int age);
signals:
    void sendNameChange(void);
    void sendAgeChange(void);
private:
    QString     m_Name;
    int         m_Age;
};
class PersonGroup : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QDeclarativeListProperty<Person> members READ members)
public:
    explicit PersonGroup(QObject *parent = 0);
    QDeclarativeListProperty<Person> members(void);
    Q_INVOKABLE int membersCount(void) const;
    Q_INVOKABLE Person *member(int index) const;
private:
    QList<Person*> m_MemberList;
};
#endif // PERSON_H

// person.cpp
#include "person.h"
//---------------------------------
//
Person::Person(QObject *parent) :
    QObject(parent), m_Name("unknow"), m_Age(0)
{
}
//---------------------------------
//
QString Person::getName(void) const
{
    return m_Name;
}
//---------------------------------
//
void Person::setName(const QString& name)
{
    m_Name = name;
    emit sendNameChange();
}
//---------------------------------
//
int Person::getAge(void)
{
    return m_Age;
}
//---------------------------------
//
void Person::setAge(int age)
{
    m_Age = age;
    emit sendAgeChange();
}
//---------------------------------
//
PersonGroup::PersonGroup(QObject *parent)
    :QObject(parent)
{
}
//---------------------------------
//
QDeclarativeListProperty<Person> PersonGroup::members(void)
{
    return QDeclarativeListProperty<Person>(this, m_MemberList);
}
//---------------------------------
//
int PersonGroup::membersCount() const
{
    return m_MemberList.size();
}
//---------------------------------
//
Person *PersonGroup::member(int index) const
{
    return m_MemberList.at(index);
}

// main.cpp
#include <QtGui/QApplication>
#include <QtDeclarative/QDeclarativeView>
#include <QtDeclarative/QDeclarativeEngine>
#include <QtDeclarative/QDeclarativeComponent>
#include "person.h"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    qmlRegisterType<Person>("People",1,0,"Person");
    //qmlRegisterType<Person>();
    qmlRegisterType<PersonGroup>("People",1,0,"PersonGroup");
    QDeclarativeView qmlView;
    qmlView.setSource(QUrl::fromLocalFile("../UICtest/UICtest.qml"));
    qmlView.show();
    return a.exec();
}

// UICtest.qml
import Qt 4.7
import People 1.0 //如果是qmlRegisterType<Person>(); 導出就可以注釋這條
Rectangle {
    width: 640
    height: 480
    property int pgcurIndex: 0;
    PersonGroup{
        id: group;
        members: [
            Person { name: "A"; age: 20},
            Person { name: "B"; age: 21},
            Person { name: "C"; age: 22},
            Person { name: "D"; age: 23},
            Person { name: "E"; age: 24}
        ]
    }
    // 顯示這份工作的一些信息
    Rectangle{
        x: 100; y: 100;
        width: 100; height: 100;
        Text { id: text1;  text: ""}
        Text { id: text2;  y: 20; text: ""}
        Text { id: text3;  y: 40; text: ""}
    }
    MouseArea{
        anchors.fill: parent;
        onClicked:{
            //if (pgcurIndex < group.membersCount() - 1){ // 這里兩種方法都可以
            if (pgcurIndex < group.members.length - 1){
                pgcurIndex++;
            }else{
                pgcurIndex = 0;
            }
            // 顯示信息
            text1.text = "PersonGroup index: " + pgcurIndex;
            var person = group.member(pgcurIndex);
            text2.text = "Person name: " + person.name;
            text3.text = "Person age: "  + person.age;
        }
    }
}