Qt.git - Qt s a cross-platform application framework that is used for developing application software that can be run on various software and hardware platforms with little or no change in the underlying codebase, while still being a native application with native capabilities and speed.

diff options

author	Geir Vattekar <geir.vattekar@trolltech.com>	2009-05-06 14:51:21 (GMT)
committer	Geir Vattekar <geir.vattekar@trolltech.com>	2009-05-06 14:51:21 (GMT)
commit	85f6350812d5a22c496c66f4f91ea8e36e454561 (patch)
tree	740f099380184460a99f9c2c36646e19e08778d8 /doc/src/snippets/code/src_opengl_qglpixelbuffer.cpp
parent	92f2815bf45a67ec8c6b94ca26fb8598a07a6de2 (diff)
parent	ec8fef8f17ac69bacc3d250a0d5932c336276bc5 (diff)
download	Qt-85f6350812d5a22c496c66f4f91ea8e36e454561.zip Qt-85f6350812d5a22c496c66f4f91ea8e36e454561.tar.gz Qt-85f6350812d5a22c496c66f4f91ea8e36e454561.tar.bz2

Merge branch '4.5' of git@scm.dev.nokia.troll.no:qt/qt into 4.5

Diffstat (limited to 'doc/src/snippets/code/src_opengl_qglpixelbuffer.cpp')

0 files changed, 0 insertions, 0 deletions

/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the documentation 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." ** $QT_END_LICENSE$ ** ****************************************************************************/ //! [0] QScriptEngine myEngine; QScriptValue three = myEngine.evaluate("1 + 2"); //! [0] //! [1] QScriptValue fun = myEngine.evaluate("(function(a, b) { return a + b; })"); QScriptValueList args; args << 1 << 2; QScriptValue threeAgain = fun.call(QScriptValue(), args); //! [1] //! [2] QString fileName = "helloworld.qs"; QFile scriptFile(fileName); if (!scriptFile.open(QIODevice::ReadOnly)) // handle error QTextStream stream(&scriptFile); QString contents = stream.readAll(); scriptFile.close(); myEngine.evaluate(contents, fileName); //! [2] //! [3] myEngine.globalObject().setProperty("myNumber", 123); ... QScriptValue myNumberPlusOne = myEngine.evaluate("myNumber + 1"); //! [3] //! [4] QScriptValue result = myEngine.evaluate(...); if (myEngine.hasUncaughtException()) { int line = myEngine.uncaughtExceptionLineNumber(); qDebug() << "uncaught exception at line" << line << ":" << result.toString(); } //! [4] //! [5] QPushButton button; QScriptValue scriptButton = myEngine.newQObject(&button); myEngine.globalObject().setProperty("button", scriptButton); myEngine.evaluate("button.checkable = true"); qDebug() << scriptButton.property("checkable").toBoolean(); scriptButton.property("show").call(); // call the show() slot //! [5] //! [6] QScriptValue myAdd(QScriptContext *context, QScriptEngine *engine) { QScriptValue a = context->argument(0); QScriptValue b = context->argument(1); return a.toNumber() + b.toNumber(); } //! [6] //! [7] QScriptValue fun = myEngine.newFunction(myAdd); myEngine.globalObject().setProperty("myAdd", fun); //! [7] //! [8] QScriptValue result = myEngine.evaluate("myAdd(myNumber, 1)"); //! [8] //! [9] QScriptValue Foo(QScriptContext *context, QScriptEngine *engine) { if (context->calledAsConstructor()) { // initialize the new object context->thisObject().setProperty("bar", ...); // ... // return a non-object value to indicate that the // thisObject() should be the result of the "new Foo()" expression return engine->undefinedValue(); } else { // not called as "new Foo()", just "Foo()" // create our own object and return that one QScriptValue object = engine->newObject(); object.setPrototype(context->callee().property("prototype")); object.setProperty("baz", ...); return object; } } ... QScriptValue fooProto = engine->newObject(); fooProto.setProperty("whatever", ...); engine->globalObject().setProperty("Foo", engine->newFunction(Foo, fooProto)); //! [9] //! [10] class Bar { ... }; Q_DECLARE_METATYPE(Bar) QScriptValue constructBar(QScriptContext *context, QScriptEngine *engine) { Bar bar; // initialize from arguments in context, if desired ... return engine->toScriptValue(bar); } class BarPrototype : public QObject, public QScriptable { // provide the scriptable interface of this type using slots and properties ... }; ... // create and register the Bar prototype and constructor in the engine BarPrototype *barPrototypeObject = new BarPrototype(...); QScriptValue barProto = engine->newQObject(barPrototypeObject); engine->setDefaultPrototype(qMetaTypeId<Bar>, barProto); QScriptValue barCtor = engine->newFunction(constructBar, barProto); engine->globalObject().setProperty("Bar", barCtor); //! [10] //! [11] static QScriptValue getSetFoo(QScriptContext *context, QScriptEngine *engine) { QScriptValue callee = context->callee(); if (context->argumentCount() == 1) // writing? callee.setProperty("value", context->argument(0)); return callee.property("value"); } .... QScriptValue object = engine.newObject(); object.setProperty("foo", engine.newFunction(getSetFoo), QScriptValue::PropertyGetter | QScriptValue::PropertySetter); //! [11] //! [12] QScriptValue object = engine.newObject(); object.setProperty("foo", engine.newFunction(getFoo), QScriptValue::PropertyGetter); object.setProperty("foo", engine.newFunction(setFoo), QScriptValue::PropertySetter); //! [12] //! [13] Q_SCRIPT_DECLARE_QMETAOBJECT(QLineEdit, QWidget*) ... QScriptValue lineEditClass = engine.scriptValueFromQMetaObject<QLineEdit>(); engine.globalObject().setProperty("QLineEdit", lineEditClass); //! [13] //! [14] if (hello && world) print("hello world"); //! [14] //! [15] if (hello && //! [15] //! [16] 0 = 0 //! [16] //! [17] ./test.js //! [17] //! [18] foo["bar"] //! [18] //! [19] QScriptEngine engine; QScriptContext *context = engine.pushContext(); context->activationObject().setProperty("myArg", 123); engine.evaluate("var tmp = myArg + 42"); ... engine.popContext(); //! [19] //! [20] struct MyStruct { int x; int y; }; //! [20] //! [21] Q_DECLARE_METATYPE(MyStruct) //! [21] //! [22] QScriptValue toScriptValue(QScriptEngine *engine, const MyStruct &s) { QScriptValue obj = engine->newObject(); obj.setProperty("x", s.x); obj.setProperty("y", s.y); return obj; } void fromScriptValue(const QScriptValue &obj, MyStruct &s) { s.x = obj.property("x").toInt32(); s.y = obj.property("y").toInt32(); } //! [22] //! [23] qScriptRegisterMetaType(engine, toScriptValue, fromScriptValue); //! [23] //! [24] MyStruct s = qscriptvalue_cast<MyStruct>(context->argument(0)); ... MyStruct s2; s2.x = s.x + 10; s2.y = s.y + 20; QScriptValue v = engine->toScriptValue(s2); //! [24] //! [25] QScriptValue createMyStruct(QScriptContext *, QScriptEngine *engine) { MyStruct s; s.x = 123; s.y = 456; return engine->toScriptValue(s); } ... QScriptValue ctor = engine.newFunction(createMyStruct); engine.globalObject().setProperty("MyStruct", ctor); //! [25] //! [26] Q_DECLARE_METATYPE(QVector<int>) ... qScriptRegisterSequenceMetaType<QVector<int> >(engine); ... QVector<int> v = qscriptvalue_cast<QVector<int> >(engine->evaluate("[5, 1, 3, 2]")); qSort(v.begin(), v.end()); QScriptValue a = engine->toScriptValue(v); qDebug() << a.toString(); // outputs "[1, 2, 3, 5]" //! [26] //! [27] QScriptValue mySpecialQObjectConstructor(QScriptContext *context, QScriptEngine *engine) { QObject *parent = context->argument(0).toQObject(); QObject *object = new QObject(parent); return engine->newQObject(object, QScriptEngine::ScriptOwnership); } ... QScriptValue ctor = engine.newFunction(mySpecialQObjectConstructor); QScriptValue metaObject = engine.newQMetaObject(&QObject::staticMetaObject, ctor); engine.globalObject().setProperty("QObject", metaObject); QScriptValue result = engine.evaluate("new QObject()"); //! [27]


context:
space:
mode: