What's the proper way to implement pause screen?

cocos2d-x C++
#21

I wrote my Pause Menu class a few months ago when I still don’t have that much knowledge about cocos2d-x. I didn’t know unshceduleUpdate* andpauseSchedulerAndActions()* before, hence, the use of the pause flag. I’m too busy right now to rewrite the class so I just left it the way it was.

#22

@Lance
Sorry, I meant Wasin had a pause flag in his and was wondering why. I completely understand why you did for yours as that is similar to how I had done mine as I was in the same boat not having much knowledge about cocos2d-x when I had done my framework so I have had mine setup the way I am used to with a pause flag and without event handling/scheduling (although I have made a few frameworks with event handling, especially in AS3 programming, I am still mostly used to non-event handling frameworks). I have only just now changed it and removed my pause flag with the new setup I did yesterday.

Scene pause difficulties
#23

Thanks for pointing out Tim! It’s no need to use the flag now as we pause the schedule. I’ll update my code, and my comment above.

#24

Just in case someone wants another simple approach… you can draw last frame (before pause) to a texture and use it as a background in a new pushed scene, something like this:

//scene to be visited/drawn by Render Texture
CCScene *currentScene = CCDirector::sharedDirector()->getRunningScene();

//new scene to be pushed to director
CCScene *newScene = CCScene::create();

//create Render Texture using design resolution size
CCSize winSize = CCDirector::sharedDirector()->getWinSize();
CCRenderTexture *rt = CCRenderTexture::create( winSize.width, winSize.height );

//draw current scene to texture (this will visit/draw all children in currentScene)
rt->begin();
currentScene->visit();
rt->end();

//This is because I am using anti-alias (GL_LINEAR) in my graphics
rt->getSprite()->getTexture()->setAntiAliasTexParameters();
//If you need to use alias/pixelated (GL_NEAREST) in your graphics comment previous and uncomment following line
//rt->getSprite()->getTexture()->setAliasTexParameters();

//move rendered texture to layer position
rt->getSprite()->setAnchorPoint( ccp(0,1) );
//if you don't want to move the anchor point then do this
//rt->setPosition( rt->getSprite()->getTexture()->getContentSize() / 2 );

//add rendered texture to the new scene
scene->addChild( rt );
//--- add whatever you want to this new scene including a callback to pop this new scene from the director ---//

//push new scene (all actions will be paused automatically)
CCDirector::sharedDirector()->pushScene( newScene );

Warning: If you use this method onExit, onExitTransitionDidFinish, onEnter and onEnterTransitionDidFinish will be called (again) for the Layers on scene being paused after pushing/popping scenes. For example, onExit/onExitTransitionDidFinish will be called on paused scene’s nodes as soon as new scene is pushed to the director and onEnter/onEnterTransitionDidFinish will be called on resuming scene’s nodes after the stacked scene is popped from director. So if you have something being created/scheduled/deleted/unscheduled on these functions, be aware that they will be called again and this can lead to error or duplicates if not managed carefully.