OpenGL examples: Introduce QCommandLineParser

Task-number: QTBUG-60626
Change-Id: I6d102327c89206fcdce10f3ac04e112270b11ad2
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

3 files changed, 31 insertions, 6 deletions

diff --git a/examples/opengl/hellogl2/glwidget.cpp b/examples/opengl/hellogl2/glwidget.cpp
index fc961da4c4..f9518ffac5 100644
--- a/examples/opengl/hellogl2/glwidget.cpp
+++ b/examples/opengl/hellogl2/glwidget.cpp
@@ -54,6 +54,8 @@
 #include <QCoreApplication>
 #include <math.h>
 
+bool GLWidget::m_transparent = false;
+
 GLWidget::GLWidget(QWidget *parent)
     : QOpenGLWidget(parent),
       m_xRot(0),
@@ -61,10 +63,9 @@ GLWidget::GLWidget(QWidget *parent)
       m_zRot(0),
       m_program(0)
 {
-    m_core = QCoreApplication::arguments().contains(QStringLiteral("--coreprofile"));
+    m_core = QSurfaceFormat::defaultFormat().profile() == QSurfaceFormat::CoreProfile;
     // --transparent causes the clear color to be transparent. Therefore, on systems that
     // support it, the widget will become transparent apart from the logo.
-    m_transparent = QCoreApplication::arguments().contains(QStringLiteral("--transparent"));
     if (m_transparent) {
         QSurfaceFormat fmt = format();
         fmt.setAlphaBufferSize(8);
diff --git a/examples/opengl/hellogl2/glwidget.h b/examples/opengl/hellogl2/glwidget.h
index cff5633893..21dd200dc7 100644
--- a/examples/opengl/hellogl2/glwidget.h
+++ b/examples/opengl/hellogl2/glwidget.h
@@ -68,6 +68,9 @@ public:
     GLWidget(QWidget *parent = 0);
     ~GLWidget();
 
+    static bool isTransparent() { return m_transparent; }
+    static void setTransparent(bool t) { m_transparent = t; }
+
     QSize minimumSizeHint() const override;
     QSize sizeHint() const override;
 
@@ -108,7 +111,7 @@ private:
     QMatrix4x4 m_proj;
     QMatrix4x4 m_camera;
     QMatrix4x4 m_world;
-    bool m_transparent;
+    static bool m_transparent;
 };
 
 #endif
diff --git a/examples/opengl/hellogl2/main.cpp b/examples/opengl/hellogl2/main.cpp
index 143f659eb6..b52a5a37d3 100644
--- a/examples/opengl/hellogl2/main.cpp
+++ b/examples/opengl/hellogl2/main.cpp
@@ -51,25 +51,46 @@
 #include <QApplication>
 #include <QDesktopWidget>
 #include <QSurfaceFormat>
+#include <QCommandLineParser>
+#include <QCommandLineOption>
 
+#include "glwidget.h"
 #include "mainwindow.h"
 
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
 
+    QCoreApplication::setApplicationName("Qt Hello GL 2 Example");
+    QCoreApplication::setOrganizationName("QtProject");
+    QCoreApplication::setApplicationVersion(QT_VERSION_STR);
+    QCommandLineParser parser;
+    parser.setApplicationDescription(QCoreApplication::applicationName());
+    parser.addHelpOption();
+    parser.addVersionOption();
+    QCommandLineOption multipleSampleOption("multisample", "Multisampling");
+    parser.addOption(multipleSampleOption);
+    QCommandLineOption coreProfileOption("coreprofile", "Use core profile");
+    parser.addOption(coreProfileOption);
+    QCommandLineOption transparentOption("transparent", "Transparent window");
+    parser.addOption(transparentOption);
+
+    parser.process(app);
+
     QSurfaceFormat fmt;
     fmt.setDepthBufferSize(24);
-    if (QCoreApplication::arguments().contains(QStringLiteral("--multisample")))
+    if (parser.isSet(multipleSampleOption))
         fmt.setSamples(4);
-    if (QCoreApplication::arguments().contains(QStringLiteral("--coreprofile"))) {
+    if (parser.isSet(coreProfileOption)) {
         fmt.setVersion(3, 2);
         fmt.setProfile(QSurfaceFormat::CoreProfile);
     }
     QSurfaceFormat::setDefaultFormat(fmt);
 
     MainWindow mainWindow;
-    if (QCoreApplication::arguments().contains(QStringLiteral("--transparent"))) {
+
+    GLWidget::setTransparent(parser.isSet(transparentOption));
+    if (GLWidget::isTransparent()) {
         mainWindow.setAttribute(Qt::WA_TranslucentBackground);
         mainWindow.setAttribute(Qt::WA_NoSystemBackground, false);
     }