Viadeo Twitter Google Bookmarks ! Facebook Digg del.icio.us MySpace Yahoo MyWeb Blinklist Netvouz Reddit Simpy StumbleUpon Bookmarks Windows Live Favorites 
Logo Documentation Qt ·  Page d'accueil  ·  Toutes les classes  ·  Classes principales  ·  Annotées  ·  Classes groupées  ·  Modules  ·  Fonctions  · 

main.cpp Example File

script/qscript/main.cpp
 /****************************************************************************
 **
 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
 **     the names of its contributors may be used to endorse or promote
 **     products derived from this software without specific prior written
 **     permission.
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <qscriptengine.h>

 #include <QtCore/QFile>
 #include <QtCore/QTextStream>
 #include <QtCore/QStringList>
 #include <QtWidgets/QApplication>

 #include <stdlib.h>

 #include "bytearrayclass.h"

 static bool wantsToQuit;

 static QScriptValue qtscript_quit(QScriptContext *ctx, QScriptEngine *eng)
 {
     Q_UNUSED(ctx);
     wantsToQuit = true;
     return eng->undefinedValue();
 }

 static void interactive(QScriptEngine *eng)
 {
     QScriptValue global = eng->globalObject();
     QScriptValue quitFunction = eng->newFunction(qtscript_quit);
     if (!global.property(QLatin1String("exit")).isValid())
         global.setProperty(QLatin1String("exit"), quitFunction);
     if (!global.property(QLatin1String("quit")).isValid())
         global.setProperty(QLatin1String("quit"), quitFunction);
     wantsToQuit = false;

     QTextStream qin(stdin, QFile::ReadOnly);

     const char *qscript_prompt = "qs> ";
     const char *dot_prompt = ".... ";
     const char *prompt = qscript_prompt;

     QString code;

     forever {
         QString line;

         printf("%s", prompt);
         fflush(stdout);

         line = qin.readLine();
         if (line.isNull())
             break;

         code += line;
         code += QLatin1Char('\n');

         if (line.trimmed().isEmpty()) {
             continue;

         } else if (! eng->canEvaluate(code)) {
             prompt = dot_prompt;

         } else {
             QScriptValue result = eng->evaluate(code, QLatin1String("typein"));

             code.clear();
             prompt = qscript_prompt;

             if (! result.isUndefined())
                 fprintf(stderr, "%s\n", qPrintable(result.toString()));

             if (wantsToQuit)
                 break;
         }
     }
 }

 static QScriptValue importExtension(QScriptContext *context, QScriptEngine *engine)
 {
     return engine->importExtension(context->argument(0).toString());
 }

 static QScriptValue loadScripts(QScriptContext *context, QScriptEngine *engine)
 {
     for (int i = 0; i < context->argumentCount(); ++i) {
         QString fileName = context->argument(0).toString();
         QFile file(fileName);
         if (!file.open(QIODevice::ReadOnly))
             return context->throwError(QString::fromLatin1("could not open %0 for reading").arg(fileName));
         QTextStream ts(&file);
         QString contents = ts.readAll();
         file.close();
         QScriptContext *pc = context->parentContext();
         context->setActivationObject(pc->activationObject());
         context->setThisObject(pc->thisObject());
         QScriptValue ret = engine->evaluate(contents);
         if (engine->hasUncaughtException())
             return ret;
     }
     return engine->undefinedValue();
 }

 int main(int argc, char *argv[])
 {
     QApplication *app;
     if (argc >= 2 && !qstrcmp(argv[1], "-tty")) {
         ++argv;
        --argc;
         app = new QApplication(argc, argv, QApplication::Tty);
     } else {
         app = new QApplication(argc, argv);
     }

     QScriptEngine *eng = new QScriptEngine();

     QScriptValue globalObject = eng->globalObject();

     globalObject.setProperty("load", eng->newFunction(loadScripts, /*length=*/1));

     {
         if (!globalObject.property("qt").isObject())
             globalObject.setProperty("qt", eng->newObject());
         QScriptValue qscript = eng->newObject();
         qscript.setProperty("importExtension", eng->newFunction(importExtension));
         globalObject.property("qt").setProperty("script", qscript);
     }

     ByteArrayClass *byteArrayClass = new ByteArrayClass(eng);
     globalObject.setProperty("ByteArray", byteArrayClass->constructor());

     if (! *++argv) {
         interactive(eng);
         return EXIT_SUCCESS;
     }

     while (const char *arg = *argv++) {
         QString fn = QString::fromLocal8Bit(arg);

         if (fn == QLatin1String("-i")) {
             interactive(eng);
             break;
         }

         QString contents;
         int lineNumber = 1;

         if (fn == QLatin1String("-")) {
             QTextStream stream(stdin, QFile::ReadOnly);
             contents = stream.readAll();
         }

         else {
             QFile file(fn);

             if (file.open(QFile::ReadOnly)) {
                 QTextStream stream(&file);
                 contents = stream.readAll();
                 file.close();

                 // strip off #!/usr/bin/env qscript line
                 if (contents.startsWith("#!")) {
                     contents.remove(0, contents.indexOf("\n"));
                     ++lineNumber;
                 }
             }
         }

         if (contents.isEmpty())
             continue;

         QScriptValue r = eng->evaluate(contents, fn, lineNumber);
         if (eng->hasUncaughtException()) {
             QStringList backtrace = eng->uncaughtExceptionBacktrace();
             fprintf (stderr, "    %s\n%s\n\n", qPrintable(r.toString()),
                      qPrintable(backtrace.join("\n")));
             return EXIT_FAILURE;
         }
     }

     delete eng;
     delete app;

     return EXIT_SUCCESS;
 }
Cette page est une traduction d'une page de la documentation de Qt, écrite par Nokia Corporation and/or its subsidiary(-ies). Les éventuels problèmes résultant d'une mauvaise traduction ne sont pas imputables à Nokia. Qt 5.0-snapshot
Copyright © 2012 Developpez LLC. Tous droits réservés Developpez LLC. Aucune reproduction, même partielle, ne peut être faite de ce site et de l'ensemble de son contenu : textes, documents et images sans l'autorisation expresse de Developpez LLC. Sinon, vous encourez selon la loi jusqu'à 3 ans de prison et jusqu'à 300 000 E de dommages et intérêts. Cette page est déposée à la SACD.
Vous avez déniché une erreur ? Un bug ? Une redirection cassée ? Ou tout autre problème, quel qu'il soit ? Ou bien vous désirez participer à ce projet de traduction ? N'hésitez pas à nous contacter ou par MP !
 
 
 
 
Partenaires

Hébergement Web