QML与c++交互学习笔记(四)

1.导出Person类，并且一个Job类，Job类包含一个Person的指针

2.具体导出过程

1.通过属性来实现，具体的请看代码

3.具体代码

// person.h#ifndef PERSON_H#define PERSON_H#include <QObject>#include <QColor>class Person : public QObject{    Q_OBJECT    // 设置设置属性的名字是 name    // 对应读取函数名字 getName    // 对应写函数名字 setName    // 属性发生改变后发送信号 sendNameChange    Q_PROPERTY(QString name READ getName WRITE setName NOTIFY sendNameChange)   // 设置设置属性的名字是 age   // 对应读取函数名字 getAge   // 对应写函数名字 setAge   // 属性发生改变后发送信号 sendAgeChange   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;};/* 设想一份工作给予一个人 */class Job : public QObject{    Q_OBJECT    Q_PROPERTY(Person *per READ getPerson WRITE setPerson NOTIFY sendPersonChange)    Q_PROPERTY(QString jn READ getJobName WRITE setJobName NOTIFY sendJobNameChange)public:    explicit Job(QObject *parent = 0);    ~Job();    void setPerson(Person *per);    Person *getPerson(void) const;    void setJobName(const QString & jobname);    QString getJobName(void) const;signals:    void sendPersonChange();    void sendJobNameChange();private:    Person *m_Person;    QString m_JobName;};#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();}//---------------------------------//Job::Job(QObject *parent)    :QObject(parent), m_Person(0), m_JobName("unknown"){}//---------------------------------//Job::~Job(){}//---------------------------------//void Job::setPerson(Person *per){    m_Person = per;    emit sendPersonChange();}//---------------------------------//Person *Job::getPerson(void) const{    return m_Person;}//---------------------------------//void Job::setJobName(const QString & jobname){    m_JobName = jobname;    emit sendJobNameChange();}//---------------------------------//QString Job::getJobName(void) const{    return m_JobName;}

// 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<Job>("People",1,0,"Job");    QDeclarativeView qmlView;    qmlView.setSource(QUrl::fromLocalFile("../UICtest/UICtest.qml"));    qmlView.show();    return a.exec();}

// UICtest.qmlimport Qt 4.7import People 1.0 //如果是qmlRegisterType<Person>(); 导出就可以注释这条Rectangle {    width: 640    height: 480    Job {        id: jobA;        jn: "Learn";        per: Person { id: ps; name: "Luly"; age: 25; }    }    // 显示这份工作的一些信息    Rectangle{        x: 100; y: 100;        width: 100; height: 100;        Text { text: "Job name:" + jobA.jn; }        Text { y: 20; text: "Person name:" + ps.name; }        Text { y: 40; text: "Person age:"  + ps.age; }    }    MouseArea{        anchors.fill: parent;        onClicked:{            // 我要改变工作的名字 工作人的信息            jobA.jn = "Clean House";            ps.name = "Tom";            ps.age = 30;        }    }}

说明:

主要是导出了两个类Person和Job, Job 包含一个Person的指针，这样后，可以看到

在QML中，我们需要给予Job对象一个Person来尽心赋值。

QML与c++交互学习笔记(四)