oxygine-framework/examples/HelloWorld/src/example.cpp

#include "oxygine-framework.h"
#include <functional>

using namespace oxygine;

//it is our resources
//in real project you would have more than one Resources declarations.
//It is important on mobile devices with limited memory and you would load/unload them
Resources gameResources;


class MainActor: public Actor
{
public:
    spTextField _text;
    spSprite    _button;

    MainActor()
    {
        //create button Sprite
        spSprite button = new Sprite();


        //setup it:
        //set button.png image. Resource 'button' defined in 'res.xml'
        button->setResAnim(gameResources.getResAnim("button"));

        //centered button at screen
        Vector2 pos = getStage()->getSize() / 2 - button->getSize() / 2;
        button->setPosition(pos);

        //register  click handler to button
        EventCallback cb = CLOSURE(this, &MainActor::buttonClicked);        
        button->addEventListener(TouchEvent::CLICK, cb);

        //animate mouse over and mouse out events
        cb = CLOSURE(this, &MainActor::buttonOverOut);
        button->addEventListener(TouchEvent::OVER, cb);
        button->addEventListener(TouchEvent::OUT, cb);

#ifdef CLOSURE_FUNCTION //if your compiler supports lambda

        button->addEventListener(TouchEvent::CLICK, [](Event * e)->void
        {
            log::messageln("button clicked");
        });

#endif

        //attach button as child to current actor
        addChild(button);
        _button = button;



        //create TextField Actor
        spTextField text = new TextField();
        //attach it as child to button
        text->attachTo(button);
        //centered in button
        text->setPosition(button->getSize() / 2);

        //initialize text style
        TextStyle style = TextStyle(gameResources.getResFont("main")).withColor(Color::White).alignMiddle();
        text->setStyle(style);
        text->setText("Click\nMe!");

        _text = text;
    }

    void buttonClicked(Event* event)
    {
        //user clicked to button

        //animate button by chaning color
        _button->setColor(Color::White);
        _button->addTween(Sprite::TweenColor(Color::Green), 500, 1, true);

        //animate text by scaling
        _text->setScale(1.0f);
        _text->addTween(Actor::TweenScale(1.1f), 500, 1, true);

        //and change text
        _text->setText("Clicked!");

        //lets create and run sprite with simple animation
        runSprite();
    }

    void buttonOverOut(Event* e)
    {
        if (e->type == TouchEvent::OVER)
        {
            _button->addTween(Sprite::TweenAddColor(Color(64, 64, 64, 0)), 300);
        }

        if (e->type == TouchEvent::OUT)
        {
            _button->addTween(Sprite::TweenAddColor(Color(0, 0, 0, 0)), 300);
        }
    }

    void runSprite()
    {
        spSprite sprite = new Sprite();
        addChild(sprite);

        int duration = 600;//ms
        int loops = -1;//infinity loops

        //animation has 8 columns - frames, check 'res.xml'
        ResAnim* animation = gameResources.getResAnim("anim");

        //add animation tween to sprite
        //TweenAnim would change animation frames
        sprite->addTween(Sprite::TweenAnim(animation), duration, loops);

        Vector2 destPos = getStage()->getSize() - sprite->getSize();
        Vector2 srcPos = Vector2(0, destPos.y);
        //set sprite initial position
        sprite->setPosition(srcPos);

        //add another tween: TweenQueue
        //TweenQueue is a collection of tweens
        spTweenQueue tweenQueue = new TweenQueue();
        tweenQueue->setDelay(1500);
        //first, move sprite to dest position
        tweenQueue->add(Sprite::TweenPosition(destPos), 2500, 1);
        //then fade it out smoothly
        tweenQueue->add(Sprite::TweenAlpha(0), 500, 1);

        sprite->addTween(tweenQueue);

        //and remove sprite from tree when tweenQueue is empty
        //if you don't hold any references to sprite it would be deleted automatically
        tweenQueue->detachWhenDone();
    }
};
//declare spMainActor as intrusive_ptr holder of MainActor
typedef oxygine::intrusive_ptr<MainActor> spMainActor;
//you could use DECLARE_SMART preprocessor definition it does the same:
//DECLARE_SMART(MainActor, spMainActor)

void example_preinit() {}

//called from main.cpp
void example_init()
{
    //load xml file with resources definition
    gameResources.loadXML("res.xml");


    //lets create our client code simple actor
    //spMainActor was defined above as smart intrusive pointer (read more: http://www.boost.org/doc/libs/1_60_0/libs/smart_ptr/intrusive_ptr.html)
    spMainActor actor = new MainActor;

    //and add it to Stage as child
    getStage()->addChild(actor);
}


//called each frame from main.cpp
void example_update()
{
}

//called each frame from main.cpp
void example_destroy()
{
    //free previously loaded resources
    gameResources.free();
}