how to move, zoom in or out the layer like coc in cocos2d-x?

Question

I create a level layer which include all the game stuff, such as background, enemies, bullets, player and other decals, I want to make this layer can be moved, zoom in and out, most likely clash of clans, Is there any suggestion or ideal, thanks.

Answer 1

Suppose your Layer name is exampleLayer

LAYER MOVEMENT

In your layers ccTouchMoved function implement the following code

 void ccTouchMoved(CCTouch* touch, CCEvent* event)
    {
        CCPoint diff = touch->getDelta();
        CCPoint currentPos = exampleLayer->getPosition();
        exampleLayer->setPosition(ccpAdd(currentPos, diff));
    }

ZOOM IN AND ZOOM OUT

void zoomIn()
{
    exampleLayer->setPosition(-(CCDirector::sharedDirector()->getWinSize().width/2),-(CCDirector::sharedDirector()->getWinSize().height/2)); // for positioning the laer in middle
    exampleLayer->setScale(1); // you can set your scale factor 1 is for example
}

void zoomOut()
{
    exampleLayer->setPosition(0,0);
    exampleLayer->setScale(1); // set your desired scale factor
}

You can call these methods on your zoomIn and zoomOut button, or as per your game design. Hope it will help you.