From 806dda08d685bc5f9ed71dfe8b61f21848d48066 Mon Sep 17 00:00:00 2001 From: Gabriel de Dietrich Date: Fri, 17 Aug 2012 13:23:19 +0200 Subject: Moving .qdoc files under examples/widgets/doc Updated those .qdoc files to refer to the new relative examples emplacement. Images and snippets to be moved later. Also grouped all widgets related examples under widgets. Change-Id: Ib29696e2d8948524537f53e8dda88f9ee26a597f Reviewed-by: J-P Nurmi --- examples/widgets/graphicsview/boxes/main.cpp | 150 +++++++++++++++++++++++++++ 1 file changed, 150 insertions(+) create mode 100644 examples/widgets/graphicsview/boxes/main.cpp (limited to 'examples/widgets/graphicsview/boxes/main.cpp') diff --git a/examples/widgets/graphicsview/boxes/main.cpp b/examples/widgets/graphicsview/boxes/main.cpp new file mode 100644 index 0000000000..2baa539d3a --- /dev/null +++ b/examples/widgets/graphicsview/boxes/main.cpp @@ -0,0 +1,150 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the demonstration applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 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 the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//#include +#include "glextensions.h" + +#include "scene.h" + +#include +#include + +class GraphicsView : public QGraphicsView +{ +public: + GraphicsView() + { + setWindowTitle(tr("Boxes")); + setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform); + //setRenderHints(QPainter::SmoothPixmapTransform); + } + +protected: + void resizeEvent(QResizeEvent *event) { + if (scene()) + scene()->setSceneRect(QRect(QPoint(0, 0), event->size())); + QGraphicsView::resizeEvent(event); + } +}; + +inline bool matchString(const char *extensionString, const char *subString) +{ + int subStringLength = strlen(subString); + return (strncmp(extensionString, subString, subStringLength) == 0) + && ((extensionString[subStringLength] == ' ') || (extensionString[subStringLength] == '\0')); +} + +bool necessaryExtensionsSupported() +{ + const char *extensionString = reinterpret_cast(glGetString(GL_EXTENSIONS)); + const char *p = extensionString; + + const int GL_EXT_FBO = 1; + const int GL_ARB_VS = 2; + const int GL_ARB_FS = 4; + const int GL_ARB_SO = 8; + int extensions = 0; + + while (*p) { + if (matchString(p, "GL_EXT_framebuffer_object")) + extensions |= GL_EXT_FBO; + else if (matchString(p, "GL_ARB_vertex_shader")) + extensions |= GL_ARB_VS; + else if (matchString(p, "GL_ARB_fragment_shader")) + extensions |= GL_ARB_FS; + else if (matchString(p, "GL_ARB_shader_objects")) + extensions |= GL_ARB_SO; + while ((*p != ' ') && (*p != '\0')) + ++p; + if (*p == ' ') + ++p; + } + return (extensions == 15); +} + +int main(int argc, char **argv) +{ + QApplication app(argc, argv); + + if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_5) == 0) { + QMessageBox::critical(0, "OpenGL features missing", + "OpenGL version 1.5 or higher is required to run this demo.\n" + "The program will now exit."); + return -1; + } + + int maxTextureSize = 1024; + QGLWidget *widget = new QGLWidget(QGLFormat(QGL::SampleBuffers)); + widget->makeCurrent(); + + if (!necessaryExtensionsSupported()) { + QMessageBox::critical(0, "OpenGL features missing", + "The OpenGL extensions required to run this demo are missing.\n" + "The program will now exit."); + delete widget; + return -2; + } + + // Check if all the necessary functions are resolved. + if (!getGLExtensionFunctions().resolve(widget->context())) { + QMessageBox::critical(0, "OpenGL features missing", + "Failed to resolve OpenGL functions required to run this demo.\n" + "The program will now exit."); + delete widget; + return -3; + } + + // TODO: Make conditional for final release + QMessageBox::information(0, "For your information", + "This demo can be GPU and CPU intensive and may\n" + "work poorly or not at all on your system."); + + widget->makeCurrent(); // The current context must be set before calling Scene's constructor + Scene scene(1024, 768, maxTextureSize); + GraphicsView view; + view.setViewport(widget); + view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate); + view.setScene(&scene); + view.show(); + + return app.exec(); +} + -- cgit v1.2.3