我试图找出如何在QtScripts中使用复数,以便可以从QtScript调用使用复杂参数定义的槽。用户也应该从脚本中访问复数的基本代数(+, - ,exp,...)。
只是想说明我想打电话是:
#include<complex>
typedef complex<double> Complex;
class MyCppClass : public QObject
{
Q_OBJECT
public:
...
public slots:
void mySignal(Complex rCValue); !! <<== should be callable from QtScript
...
}
有什么想法吗? THX!
答案 0 :(得分:1)
我认为你必须在QtScript中实现复杂的代数(类似http://examples.oreilly.com/9781565923928/text/8-6.txt),然后修改mySignal以接受这样的对象。
答案 1 :(得分:1)
这不是最终答案......因为如上所示,运算符+, - 和*不能用于javascript端的复数量。但是对于那些感兴趣的人,我想分享以下代码片段,它们允许触发具有复杂参数的插槽。
test.h:
#include <QtCore>
#include <QtScript>
#include <complex>
#include <iostream>
using namespace std;
typedef complex<double> Complex;
Q_DECLARE_METATYPE(Complex)
class TestClass : public QObject
{
Q_OBJECT
public:
TestClass() : QObject() {};
public slots:
void TestOutput(Complex rValue);
};
TEST.CPP:
#include "test.h"
void TestClass::TestOutput(Complex rValue)
{
cout << "received value "<< rValue << endl;
}
main.cpp中:
#include "test.h"
QScriptValue toScriptValue(QScriptEngine *eng, const Complex& rValue)
{
QScriptValue obj = eng->newObject();
obj.setProperty("re",real(rValue));
obj.setProperty("im",imag(rValue));
return obj;
}
void fromScriptValue(const QScriptValue &obj, Complex& rValue)
{
double re=obj.property("re").toNumber();
double im=obj.property("im").toNumber();
rValue=Complex(re,im);
}
QScriptValue constructComplex(QScriptContext *context, QScriptEngine *engine)
{
Complex complex=Complex(2,1);
return engine->toScriptValue(complex);
}
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
QScriptEngine eng;
// register our custom type
qScriptRegisterMetaType<Complex>(&eng, toScriptValue, fromScriptValue);
TestClass *test=new TestClass;
QObject *someObject = (QObject*)test;
QScriptValue objectValue = eng.newQObject(someObject);
eng.globalObject().setProperty("myObject", objectValue);
QScriptValue val = eng.evaluate("function Complex(real, imaginary) { this.re = real; this.im = imaginary;}; cadd = function (a, b) {return new Complex(a.re + b.re, a.im + b.im);};");
val = eng.evaluate("my_complex=new Complex(8,1); my_comp=new Complex(2,9); my_c=cadd(my_comp,my_complex);");
cout << "script"<< val.toString().toStdString() << endl;
Complex cval = qscriptvalue_cast<Complex>(val);
cout << "qscriptvalue_cast : "<< cval << endl;
val = eng.evaluate("myObject.TestOutput(my_c)");
return 0;
}