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我嘗試在原型中聲明一個信號,然後連接它是腳本funcition由於某些原因,它不工作,因爲我希望。我的代碼如下。有人能幫助我嗎?在Qt腳本原型中聲明一個信號
我期望的是,一旦我在腳本代碼中調用p.setText('New String')
,由於setText發出textChanged信號,它應該調用已經連接到腳本代碼中的catchSignal(text)
的插槽。
原型頭
#ifndef SCRIPTACTION_H
#define SCRIPTACTION_H
#include <QObject>
#include <QtScript>
class ScriptAction : public QObject , public QScriptable
{
Q_OBJECT
public:
ScriptAction(QObject *parent = 0);
signals:
void textChanged(const QString changedString);
};
#endif // SCRIPTACTION_H
類
#include "scriptaction.h"
#include <QAction>
Q_DECLARE_METATYPE(QAction*)
ScriptAction::ScriptAction(QObject *parent) : QObject(parent)
{
}
主類
#include <QApplication>
#include <QDebug>
#include <QAction>
#include "scriptaction.h"
#include <QPushButton>
Q_DECLARE_METATYPE(QAction*)
QScriptValue qAction_Constructor(QScriptContext *ctx, QScriptEngine *eng)
{
qDebug() << "QAction is called";
if(ctx->isCalledAsConstructor())
{
QObject *parent = ctx->argument(0).toQObject();
QAction *action = new QAction("Test",parent);
return eng->newQObject(action, QScriptEngine::ScriptOwnership);
} else {
return QString("invalid call. Use new Constructor");
}
}
int main(int argc, char *argv[])
{
QApplication app(argc,argv);
QScriptEngine engine;
//Evaluating a simaple expresssion
qDebug() << engine.evaluate("1+2").toNumber();
QPushButton button;
QScriptValue buttonScript= engine.newQObject(&button);
engine.globalObject().setProperty("button", buttonScript);
engine.evaluate("button.text ='Hello Text'; button.show()");
//QAction Prototype
ScriptAction qsAction ;
QScriptValue script_proto = engine.newQObject(&qsAction);
engine.setDefaultPrototype(qMetaTypeId<QAction*>(), script_proto);
QScriptValue ctor = engine.newFunction(qAction_Constructor , script_proto);
QScriptValue metaObject = engine.newQMetaObject(&QObject::staticMetaObject, ctor);
engine.globalObject().setProperty("QSAction" , metaObject);
engine.evaluate("var p = new QSAction(button);p.textChanged.connect(catchSignal);");
engine.evaluate("function catchSignal(text) { print ('PROTOTYPE SIGNAL IS CALLED ',text); } p.setText('New String'); ");
return app.exec();
}
你是什麼意思,「它不工作,我希望」? – Mehrwolf
我希望一旦我在腳本代碼中調用p.setText('New String'),因爲setText發出textChanged信號,它應該調用catchSignal(文本) – Tharanga