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/****************************************************************************
**
** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Graphics Dojo project on Trolltech Labs.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 or 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include "scriptwidget.h"
#include "mazescene.h"
#include "entity.h"
static QScriptValue qsRand(QScriptContext *, QScriptEngine *engine)
{
QScriptValue value(engine, qrand() / (RAND_MAX + 1.0));
return value;
}
void ScriptWidget::setPreset(int preset)
{
const char *presets[] =
{
"// available functions:\n"
"// entity.turnLeft()\n"
"// entity.turnRight()\n"
"// entity.turnTowards(x, y)\n"
"// entity.walk()\n"
"// entity.stop()\n"
"// rand()\n"
"// script.display()\n"
"\n"
"// available variables:\n"
"// my_x\n"
"// my_y\n"
"// player_x\n"
"// player_y\n"
"// time\n"
"\n"
"entity.stop();\n",
"entity.walk();\n"
"if ((time % 20000) < 10000) {\n"
" entity.turnTowards(10, 2.5);\n"
" if (my_x >= 5.5)\n"
" entity.stop();\n"
"} else {\n"
" entity.turnTowards(-10, 2.5);\n"
" if (my_x <= 2.5)\n"
" entity.stop();\n"
"}\n",
"dx = player_x - my_x;\n"
"dy = player_y - my_y;\n"
"if (dx * dx + dy * dy < 5) {\n"
" entity.stop();\n"
"} else {\n"
" entity.walk();\n"
" entity.turnTowards(player_x, player_y);\n"
"}\n"
};
m_sourceEdit->setPlainText(QLatin1String(presets[preset]));
}
ScriptWidget::ScriptWidget(MazeScene *scene, Entity *entity)
: m_scene(scene)
, m_entity(entity)
{
new QVBoxLayout(this);
m_statusView = new QLineEdit;
m_statusView->setReadOnly(true);
layout()->addWidget(m_statusView);
m_sourceEdit = new QPlainTextEdit;
layout()->addWidget(m_sourceEdit);
QPushButton *compileButton = new QPushButton(QLatin1String("Compile"));
layout()->addWidget(compileButton);
QComboBox *combo = new QComboBox;
layout()->addWidget(combo);
combo->addItem(QLatin1String("Default"));
combo->addItem(QLatin1String("Patrol"));
combo->addItem(QLatin1String("Follow"));
setPreset(0);
connect(combo, SIGNAL(currentIndexChanged(int)), this, SLOT(setPreset(int)));
connect(compileButton, SIGNAL(clicked()), this, SLOT(updateSource()));
m_engine = new QScriptEngine(this);
QScriptValue entityObject = m_engine->newQObject(m_entity);
m_engine->globalObject().setProperty("entity", entityObject);
QScriptValue widgetObject = m_engine->newQObject(this);
m_engine->globalObject().setProperty("script", widgetObject);
m_engine->globalObject().setProperty("rand", m_engine->newFunction(qsRand));
m_engine->setProcessEventsInterval(5);
resize(300, 400);
updateSource();
startTimer(50);
m_time.start();
}
void ScriptWidget::timerEvent(QTimerEvent *)
{
QPointF player = m_scene->camera().pos();
QPointF entity = m_entity->pos();
QScriptValue px(m_engine, player.x());
QScriptValue py(m_engine, player.y());
QScriptValue ex(m_engine, entity.x());
QScriptValue ey(m_engine, entity.y());
QScriptValue time(m_engine, m_time.elapsed());
m_engine->globalObject().setProperty("player_x", px);
m_engine->globalObject().setProperty("player_y", py);
m_engine->globalObject().setProperty("my_x", ex);
m_engine->globalObject().setProperty("my_y", ey);
m_engine->globalObject().setProperty("time", time);
m_engine->evaluate(m_source);
if (m_engine->hasUncaughtException()) {
QString text = m_engine->uncaughtException().toString();
m_statusView->setText(text);
}
}
void ScriptWidget::display(QScriptValue value)
{
m_statusView->setText(value.toString());
}
void ScriptWidget::updateSource()
{
bool wasEvaluating = m_engine->isEvaluating();
if (wasEvaluating)
m_engine->abortEvaluation();
m_time.restart();
m_source = m_sourceEdit->toPlainText();
if (wasEvaluating)
m_statusView->setText(QLatin1String("Aborted long running evaluation!"));
else if (m_engine->canEvaluate(m_source))
m_statusView->setText(QLatin1String("Evaluation succeeded"));
else
m_statusView->setText(QLatin1String("Evaluation failed"));
}
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