How to recognition keyboard event in cocos2d-x ……（Tutorial by YUYE）

cocos2d-x C++
#1

h1.At first you can add code in “AppDelegate.cpp”, you will make sure write the code below the “AppDelegate::applicationDidFinishLaunching()”

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#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)  
HelloWorld *g_layer;  

void Win32SetKeyLayer(HelloWorld *layer)  
{  
    g_layer = layer;  
}  

void Win32KeyHook( UINT message,WPARAM wParam, LPARAM lParam )  
{  
    CCLog("Win32KeyHook message %d wParam %d lParam %d", message, wParam, lParam);  
    if (g_layer)  
        g_layer->onWin32KeyEvent(message, wParam, lParam);  
}  
#endif

h1.in AppDelegate::applicationDidFinishLaunching()
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bool AppDelegate::applicationDidFinishLaunching() {  



    // initialize director  
    CCDirector* pDirector = CCDirector::sharedDirector();  
    CCEGLView* pEGLView = CCEGLView::sharedOpenGLView();  

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)  
    // add keyboard event
    pEGLView->setAccelerometerKeyHook(Win32KeyHook);///////////////////////////////////  
#endif  // CC_PLATFORM_WIN32  


    pDirector->setOpenGLView(pEGLView);  

    // turn on display FPS  
    pDirector->setDisplayStats(true);  

    // set FPS. the default value is 1.0/60 if you don't call this  
    pDirector->setAnimationInterval(1.0 / 60);  

    // create a scene. it's an autorelease object  
    CCScene *pScene = HelloWorld::scene();  

    // run  
    pDirector->runWithScene(pScene);  

    return true;  
}

h1.In HelloWorldScene.cpp
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CCScene* HelloWorld::scene()  
{  
    // 'scene' is an autorelease object  
    CCScene *scene = CCScene::create();  

    // 'layer' is an autorelease object  
    HelloWorld *layer = HelloWorld::create();  

    // add layer as a child to scene  
    scene->addChild(layer);  

    extern void Win32SetKeyLayer(HelloWorld *layer);  
    Win32SetKeyLayer(layer);  

    // return the scene  
    return scene;  
}

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#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)  
void HelloWorld::onWin32KeyEvent( UINT message,WPARAM wParam, LPARAM lParam )  
{  
     CCLog("onWin32KeyEvent message %d wParam %d lParam %d", message, wParam, lParam);  
    /*  
    // Up  
    Win32KeyHook message 256 wParam 38 lParam 21495809  
    onWin32KeyEvent message 256 wParam 38 lParam 21495809  
    Win32KeyHook message 257 wParam 38 lParam -1052246015  
    onWin32KeyEvent message 257 wParam 38 lParam -1052246015  
    // Down  
    Win32KeyHook message 256 wParam 40 lParam 22020097  
    onWin32KeyEvent message 256 wParam 40 lParam 22020097  
    Win32KeyHook message 257 wParam 40 lParam -1051721727  
    onWin32KeyEvent message 257 wParam 40 lParam -1051721727  
    // Left  
    Win32KeyHook message 256 wParam 37 lParam 21692417  
    onWin32KeyEvent message 256 wParam 37 lParam 21692417  
    Win32KeyHook message 257 wParam 37 lParam -1052049407  
    onWin32KeyEvent message 257 wParam 37 lParam -1052049407  
    // Right  
    Win32KeyHook message 256 wParam 39 lParam 21823489  
    onWin32KeyEvent message 256 wParam 39 lParam 21823489  
    Win32KeyHook message 257 wParam 39 lParam -1051918335  
    onWin32KeyEvent message 257 wParam 39 lParam -1051918335  
    */  
    if (message == 256)  
    {  
        switch (wParam)  
        {  
        case 38:  
            moveHero(1);  
            break;  
        case 40:  
            moveHero(2);  
            break;  
        case 37:  
            moveHero(3);  
            break;  
        case 39:  
            moveHero(4);  
            break;  
        }  
    }  
    else if (message == 257)  
    {  
    }  
}  
#endif

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void HelloWorld::moveHero( int diraction )
{
 CCLog(“moveHero: %d”,diraction);
}


h1.//Now you can try to press “up,down,left,right” key to check the print
Using the Keyboard to Move Sprites(3.0 beta)
#2

Thank you for writing this but I’m still having a hard time with it I keep getting errors, is there anymore documentation on the subject of key recognition for windows?

#3

could you send a simple demo for me , I’ll debug it for you.

yuye.liu@chukong-inc.com

Devin Stafford wrote:

Thank you for writing this but I’m still having a hard time with it I keep getting errors, is there anymore documentation on the subject of key recognition for windows?

#4

I am trying to use run your code in my game but there are many errors when i build it. can you help me with that . i am trying to make my sprite move up down.

#5

@djain, this post was outdated, and @yuye has left our team.
Which engine version are you using, and what’s your target platform?

#6

I am using v3.2 and i am developing on visual studio. so win32 is my target platform.
so far i have this code working but my sprite(_ship) is not moving up and down. it is moving right and left when i press left arrow and right arrow.

                auto eventListener = EventListenerKeyboard::create();

	    eventListener->onKeyPressed = [](EventKeyboard::KeyCode keyCode, Event* event){
		
	Vec2 loc = event->getCurrentTarget()->getPosition();
    switch(keyCode){
        case EventKeyboard::KeyCode::KEY_LEFT_ARROW:
        case EventKeyboard::KeyCode::KEY_A:
            event->getCurrentTarget()->setPosition(loc.x-10,loc.y);
            break;
        case EventKeyboard::KeyCode::KEY_RIGHT_ARROW:
        case EventKeyboard::KeyCode::KEY_D:
            event->getCurrentTarget()->setPosition(loc.x+10,loc.y);
            break;
        case EventKeyboard::KeyCode::KEY_UP_ARROW:
        case EventKeyboard::KeyCode::KEY_W:
            event->getCurrentTarget()->setPosition(loc.x,++loc.y);
            break;
        case EventKeyboard::KeyCode::KEY_DOWN_ARROW:
        case EventKeyboard::KeyCode::KEY_S:
            event->getCurrentTarget()->setPosition(loc.x,--loc.y);
            break;
    }
		
};
       this->_eventDispatcher->addEventListenerWithSceneGraphPriority(eventListener, _ship);
#7

A bit weird. I can’t find mistakes in your code. You can add CCLog in KEY_W and KEY_S, to see if they are invoked correctly.

When you press “W” and “S”, will the source code run into case EventKeyboard::Keycode::KEY_W ?

#8

am I misunderstanding?

case EventKeyboard::KeyCode::KEY_LEFT_ARROW:
        case EventKeyboard::KeyCode::KEY_A:
            event->getCurrentTarget()->setPosition(loc.x-10,loc.y);
            break;

as an example, this code would just move left from current location - 10.

Isn’t that what you are seeing. Perhaps maybe I misunderstand your post.