【cocos2d-x从c++到js】回调函数1——按键回调
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// add a "close" icon to exit the progress. it's an autorelease object
var
closeItem = cc.MenuItemImage.create(
"res/CloseNormal.png"
,
"res/CloseSelected.png"
,
function
() {
cc.log(
"close button was clicked."
);
},
this
);
closeItem.setAnchorPoint(cc.p(0.5, 0.5));
var
menu = cc.Menu.create(closeItem);
menu.setPosition(cc.p(0, 0));
this
.addChild(menu, 1);
closeItem.setPosition(cc.p(size.width - 20, 20));
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// "create" in JS
// cc.MenuItemImage.create( normalImage, selectedImage, [disabledImage], callback_fn, [this]
JSBool js_cocos2dx_CCMenuItemImage_create(JSContext *cx, uint32_t argc, jsval *vp)
{
if
(argc >= 2 && argc <= 5) {
jsval *argv = JS_ARGV(cx, vp);
JSStringWrapper arg0(argv[0]);
JSStringWrapper arg1(argv[1]);
JSStringWrapper arg2;
bool
thirdArgIsString =
true
;
jsval jsCallback = JSVAL_VOID;
jsval jsThis = JSVAL_VOID;
int
last = 2;
if
(argc >= 3) {
thirdArgIsString = argv[2].isString();
if
(thirdArgIsString) {
arg2.set(argv[2], cx);
last = 3;
}
}
cocos2d::MenuItemImage* ret = cocos2d::MenuItemImage::create(arg0.get(), arg1.get(), std::string(arg2.get()));
if
(argc >= 3) {
if
(!thirdArgIsString) {
//cc.MenuItemImage.create( normalImage, selectedImage, callback_fn, [this] )
jsCallback = argv[last++];
if
(argc == 4) {
jsThis = argv[last];
}
}
else
{
//cc.MenuItemImage.create( normalImage, selectedImage, disabledImage, callback_fn, [this] )
if
(argc >= 4) {
jsCallback = argv[last++];
if
(argc == 5) {
jsThis = argv[last];
}
}
}
}
JSObject *obj = bind_menu_item<cocos2d::MenuItemImage>(cx, ret, jsCallback, jsThis);
JS_SET_RVAL(cx, vp, OBJECT_TO_JSVAL(obj));
return
JS_TRUE;
}
JS_ReportError(cx,
"Invalid number of arguments. Expecting: 2 <= args <= 5"
);
return
JS_FALSE;
}
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if
(argc >= 3) {
if
(!thirdArgIsString) {
//cc.MenuItemImage.create( normalImage, selectedImage, callback_fn, [this] )
jsCallback = argv[last++];
if
(argc == 4) {
jsThis = argv[last];
}
}
else
{
//cc.MenuItemImage.create( normalImage, selectedImage, disabledImage, callback_fn, [this] )
if
(argc >= 4) {
jsCallback = argv[last++];
if
(argc == 5) {
jsThis = argv[last];
}
}
}
}
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JSObject *obj = bind_menu_item<cocos2d::MenuItemImage>(cx, ret, jsCallback, jsThis);
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template
<
class
T>
JSObject* bind_menu_item(JSContext *cx, T* nativeObj, jsval callback, jsval thisObj) {
js_proxy_t *p = jsb_get_native_proxy(nativeObj);
if
(p) {
addCallBackAndThis(p->obj, callback, thisObj);
return
p->obj;
}
else
{
js_type_class_t *classType = js_get_type_from_native<T>(nativeObj);
assert
(classType);
JSObject *tmp = JS_NewObject(cx, classType->jsclass, classType->proto, classType->parentProto);
// bind nativeObj <-> JSObject
js_proxy_t *proxy = jsb_new_proxy(nativeObj, tmp);
JS_AddNamedObjectRoot(cx, &proxy->obj,
typeid
(*nativeObj).name());
addCallBackAndThis(tmp, callback, thisObj);
return
tmp;
}
}
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static void addCallBackAndThis(JSObject *obj, jsval callback, jsval &thisObj)
{
if
(callback != JSVAL_VOID) {
ScriptingCore::getInstance()->setReservedSpot(0, obj, callback);
}
if
(thisObj != JSVAL_VOID) {
ScriptingCore::getInstance()->setReservedSpot(1, obj, thisObj);
}
}
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JSBool ScriptingCore::setReservedSpot(uint32_t i, JSObject *obj, jsval value) {
JS_SetReservedSlot(obj, i, value);
return
JS_TRUE;
}
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void
MenuItem::activate()
{
if
(_enabled)
{
if
( _callback )
{
_callback(
this
);
}
if
(kScriptTypeNone != _scriptType)
{
BasicScriptData data(
this
);
ScriptEvent scriptEvent(kMenuClickedEvent,&data);
ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&scriptEvent);
}
}
}
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int ScriptingCore::sendEvent(ScriptEvent* evt)
{
if
(NULL == evt)
return
0;
JSAutoCompartment ac(_cx, _global);
switch
(evt->type)
{
case
kNodeEvent:
{
return
handleNodeEvent(evt->data);
}
break
;
case
kMenuClickedEvent:
{
return
handleMenuClickedEvent(evt->data);
}
break
;
case
kTouchEvent:
{
return
handleTouchEvent(evt->data);
}
break
;
case
kTouchesEvent:
{
return
handleTouchesEvent(evt->data);
}
break
;
case
kKeypadEvent:
{
return
handleKeypadEvent(evt->data);
}
break
;
case
kAccelerometerEvent:
{
return
handleAccelerometerEvent(evt->data);
}
break
;
default
:
break
;
}
return
0;
}
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int ScriptingCore::handleMenuClickedEvent(void* data)
{
if
(NULL == data)
return
0;
BasicScriptData* basicScriptData = static_cast<BasicScriptData*>(data);
if
(NULL == basicScriptData->nativeObject)
return
0;
MenuItem* menuItem = static_cast<MenuItem*>(basicScriptData->nativeObject);
js_proxy_t * p = jsb_get_native_proxy(menuItem);
if
(!p)
return
0;
jsval retval;
jsval dataVal;
js_proxy_t *proxy = jsb_get_native_proxy(menuItem);
dataVal = (proxy ? OBJECT_TO_JSVAL(proxy->obj) : JSVAL_NULL);
executeJSFunctionFromReservedSpot(
this
->_cx, p->obj, dataVal, retval);
return
1;
}
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static
void
executeJSFunctionFromReservedSpot(JSContext *cx, JSObject *obj,
jsval &dataVal, jsval &retval) {
jsval func = JS_GetReservedSlot(obj, 0);
if
(func == JSVAL_VOID) {
return
; }
jsval thisObj = JS_GetReservedSlot(obj, 1);
JSAutoCompartment ac(cx, obj);
if
(thisObj == JSVAL_VOID) {
JS_CallFunctionValue(cx, obj, func, 1, &dataVal, &retval);
}
else
{
assert
(!JSVAL_IS_PRIMITIVE(thisObj));
JS_CallFunctionValue(cx, JSVAL_TO_OBJECT(thisObj), func, 1, &dataVal, &retval);
}
}
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