class JsEngine:
def __init__(self):
self.app = QApplication.instance()
if self.app is None:
self.app = QCoreApplication([])
self.engine = QScriptEngine()
self.globalObject = self.engine.globalObject()
# There were some problems evalating javascript inside a function callback. QtSide's bindings for QScriptEngine
# didn't seem prepared to handle it (it breaks in weird hard-to-debug ways)
# It is however not a problem if you use a wrapped QObject for the callback instead of using engine.newFunction().
# The workaround here is to pass a wrapped QObject, and then evaluate javascript to create a function that calls
# a method of the wrapped QObject.
# Also note: Wrapped QObjects passed to QtSide are not refcounted in Python! To work around this, a reference to
# "RequireObj" is stored in the JSEngine instance
self.requireObj = JsEngineRequireClass(self.engine)
self.addObject('RequireObj', self.requireObj)
self.evaluate("""
function require(arg) {
return RequireObj.require(arg);
}
""")
# Sets a variable in the global object
def addObject(self, name, obj):
wrappedObject = pyObjectToScriptValue(self.engine, obj)
self.engine.globalObject().setProperty(name, wrappedObject)
# Adds a python function to the global object, wrapping it
def addFunction(self, name, func):
f = lambda context, engine: pyObjectToScriptValue(
engine, func(*_contextToArguments(context)))
wrappedFunction = self.engine.newFunction(f)
self.engine.globalObject().setProperty(name, wrappedFunction)
# Adds a python function to the global object, not wrapping it (it gets passed raw context and engine arguments)
def addRawFunction(self, name, func):
wrappedFunction = self.engine.newFunction(func)
self.engine.globalObject().setProperty(name, wrappedFunction)
# Evaluate some javascript code
def evaluate(self, code):
result = self.engine.evaluate(code)
if self.engine.hasUncaughtException():
raise JsEngineException(result, self.engine)
return scriptValueToPyObject(result)
class JsEngine:
def __init__(self):
self.app = QApplication.instance()
if self.app is None:
self.app = QCoreApplication([])
self.engine = QScriptEngine()
self.globalObject = self.engine.globalObject()
# There were some problems evalating javascript inside a function callback. QtSide's bindings for QScriptEngine
# didn't seem prepared to handle it (it breaks in weird hard-to-debug ways)
# It is however not a problem if you use a wrapped QObject for the callback instead of using engine.newFunction().
# The workaround here is to pass a wrapped QObject, and then evaluate javascript to create a function that calls
# a method of the wrapped QObject.
# Also note: Wrapped QObjects passed to QtSide are not refcounted in Python! To work around this, a reference to
# "RequireObj" is stored in the JSEngine instance
self.requireObj = JsEngineRequireClass(self.engine)
self.addObject('RequireObj', self.requireObj)
self.evaluate("""
function require(arg) {
return RequireObj.require(arg);
}
""")
# Sets a variable in the global object
def addObject(self, name, obj):
wrappedObject = pyObjectToScriptValue(self.engine, obj)
self.engine.globalObject().setProperty(name, wrappedObject)
# Adds a python function to the global object, wrapping it
def addFunction(self, name, func):
f = lambda context,engine: pyObjectToScriptValue(engine, func(*_contextToArguments(context)))
wrappedFunction = self.engine.newFunction(f)
self.engine.globalObject().setProperty(name, wrappedFunction)
# Adds a python function to the global object, not wrapping it (it gets passed raw context and engine arguments)
def addRawFunction(self, name, func):
wrappedFunction = self.engine.newFunction(func)
self.engine.globalObject().setProperty(name, wrappedFunction)
# Evaluate some javascript code
def evaluate(self, code):
result = self.engine.evaluate(code)
if self.engine.hasUncaughtException():
raise JsEngineException(result, self.engine)
return scriptValueToPyObject(result)
