RTY 實踐出真知

// person.h
#ifndef PERSON_H
#define PERSON_H
#include <QObject>
#include <QDeclarativeListProperty>
#include <QList>
#include <QColor>
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);
    // 一個簡單的函數, 獲取藍色
    Q_INVOKABLE QColor getColor(void) const;
    Q_INVOKABLE void changeNameAndAge(void);
signals:
    void sendNameChange(void);
    void sendAgeChange(void);
private:
    QString     m_Name;
    int         m_Age;
};
#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();
}
//---------------------------------
//
QColor Person::getColor(void) const
{
    return QColor(Qt::blue);
}
//---------------------------------
//
void Person::changeNameAndAge(void)
{
    setName("Luly");
    setAge(31);
}

// main.cpp
#include <QtGui/QApplication>
#include <QtDeclarative/QDeclarativeView>
#include <QtDeclarative/QDeclarativeEngine>
#include <QtDeclarative/QDeclarativeComponent>
#include <QtDeclarative/QDeclarativeContext>
#include "person.h"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Person tmpPerson;
    tmpPerson.setName("Tom");
    tmpPerson.setAge(25);
    QDeclarativeView qmlView;
    qmlView.rootContext()->setContextProperty("ps",&tmpPerson);
    qmlView.setSource(QUrl::fromLocalFile("../UICtest/UICtest.qml"));
    qmlView.show();
    return a.exec();
}

// UICtest.qml
import Qt 4.7
Rectangle {
    width: 640
    height: 480
    Text { text: "Person name:" + ps.name; }
    Text { y: 20; text: "Person age:" + ps.age; }
    Rectangle{ x: 20; y: 40;  width: 20; height: 20; color: ps.getColor();}
    MouseArea{
        anchors.fill: parent;
        // 當鼠標按下后改變名字和年齡
        onClicked: { ps.changeNameAndAge(); }
    }
}