/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "window.h"+
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#include "environment.h"+
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#include "context2d.h"+
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#include "qcontext2dcanvas.h"+
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#include <QHBoxLayout>+
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#include <QListWidget>+
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#include <QDir>+
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#include <QMessageBox>+
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+
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#ifndef QT_NO_SCRIPTTOOLS+
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#include <QAction>+
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#include <QApplication>+
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#include <QMainWindow>+
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#include <QPushButton>+
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#include <QVBoxLayout>+
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#include <QScriptEngineDebugger>+
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#endif+
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+
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static QString scriptsDir()+
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{+
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    if (QFile::exists("./scripts"))+
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        return "./scripts";+
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    return ":/scripts";+
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}+
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+
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//! [0]+
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Window::Window(QWidget *parent)+
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    : QWidget(parent)+
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#ifndef QT_NO_SCRIPTTOOLS+
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      , m_debugger(0), m_debugWindow(0)+
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#endif+
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{+
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    m_env = new Environment(this);+
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    QObject::connect(m_env, SIGNAL(scriptError(QScriptValue)),+
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                     this, SLOT(reportScriptError(QScriptValue)));+
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+
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    Context2D *context = new Context2D(this);+
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    context->setSize(150, 150);+
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    m_canvas = new QContext2DCanvas(context, m_env, this);+
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    m_canvas->setFixedSize(context->size());+
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    m_canvas->setObjectName("tutorial");+
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    m_env->addCanvas(m_canvas);+
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//! [0]+
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+
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#ifndef QT_NO_SCRIPTTOOLS+
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    QVBoxLayout *vbox = new QVBoxLayout();+
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    vbox->addWidget(m_canvas);+
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    m_debugButton = new QPushButton(tr("Run in Debugger"));+
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    connect(m_debugButton, SIGNAL(clicked()), this, SLOT(runInDebugger()));+
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    vbox->addWidget(m_debugButton);+
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#endif+
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+
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    QHBoxLayout *hbox = new QHBoxLayout(this);+
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    m_view = new QListWidget(this);+
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    m_view->setEditTriggers(QAbstractItemView::NoEditTriggers);+
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    hbox->addWidget(m_view);+
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#ifndef QT_NO_SCRIPTTOOLS+
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    hbox->addLayout(vbox);+
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#else+
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    hbox->addWidget(m_canvas);+
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#endif+
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+
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//! [1]+
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    QDir dir(scriptsDir());+
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    QFileInfoList entries = dir.entryInfoList(QStringList() << "*.js");+
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    for (int i = 0; i < entries.size(); ++i)+
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        m_view->addItem(entries.at(i).fileName());+
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    connect(m_view, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),+
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            this, SLOT(selectScript(QListWidgetItem*)));+
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//! [1]+
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+
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    setWindowTitle(tr("Context 2D"));+
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}+
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+
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//! [2]+
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void Window::selectScript(QListWidgetItem *item)+
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{+
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    QString fileName = item->text();+
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    runScript(fileName, /*debug=*/false);+
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}+
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//! [2]+
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+
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void Window::reportScriptError(const QScriptValue &error)+
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{+
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    QMessageBox::warning(this, tr("Context 2D"), tr("Line %0: %1")+
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                         .arg(error.property("lineNumber").toInt32())+
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                         .arg(error.toString()));+
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}+
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+
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#ifndef QT_NO_SCRIPTTOOLS+
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//! [3]+
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void Window::runInDebugger()+
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{+
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    QListWidgetItem *item = m_view->currentItem();+
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    if (item) {+
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        QString fileName = item->text();+
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        runScript(fileName, /*debug=*/true);+
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    }+
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}+
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//! [3]+
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#endif+
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+
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//! [4]+
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void Window::runScript(const QString &fileName, bool debug)+
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{+
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    QFile file(scriptsDir() + "/" + fileName);+
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    file.open(QIODevice::ReadOnly);+
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    QString contents = file.readAll();+
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    file.close();+
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    m_env->reset();+
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+
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#ifndef QT_NO_SCRIPTTOOLS+
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    if (debug) {+
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        if (!m_debugger) {+
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            m_debugger = new QScriptEngineDebugger(this);+
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            m_debugWindow = m_debugger->standardWindow();+
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            m_debugWindow->setWindowModality(Qt::ApplicationModal);+
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            m_debugWindow->resize(1280, 704);+
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        }+
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        m_debugger->attachTo(m_env->engine());+
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        m_debugger->action(QScriptEngineDebugger::InterruptAction)->trigger();+
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    } else {+
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        if (m_debugger)+
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            m_debugger->detach();+
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    }+
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#else+
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    Q_UNUSED(debug);+
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#endif+
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+
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    QScriptValue ret = m_env->evaluate(contents, fileName);+
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+
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#ifndef QT_NO_SCRIPTTOOLS+
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    if (m_debugWindow)+
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        m_debugWindow->hide();+
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#endif+
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+
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    if (ret.isError())+
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        reportScriptError(ret);+
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}+
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//! [4]+
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