First triangle drawn in Qt Project

MeshViewerQt/Source/MainWindow.cpp

@@ -2,8 +2,12 @@
 #include "OpenGlViewer.h"
 #include "defines.h"
 #include <QKeyEvent>
+#include <QMessageBox>
 
 
+/////////////////////////////////////////////////////////////////////////
+// constructor/destructor
+
 MainWindow::MainWindow(QWidget *parent)
 	: QMainWindow(parent)
 	, ui (new Ui::MainWindowClass)
@@ -16,6 +20,10 @@ MainWindow::~MainWindow()
 	delete ui;
 }
 
+
+/////////////////////////////////////////////////////////////////////////
+// private functions
+
 void MainWindow::setupWindow()
 {
 	ui->setupUi(this);
@@ -26,11 +34,32 @@ void MainWindow::setupWindow()
 
 	this->setCentralWidget(new OpenGlViewer(this));
 
+	ui->mainToolBar->addAction("File Info", this, &MainWindow::aboutFile);
+
 	ui->statusBar->showMessage(DEFAULT_STATUS_MESSAGE);
-
-
 }
 
+
+/////////////////////////////////////////////////////////////////////////
+// private slots
+
+void MainWindow::openFile()
+{
+	//TODO: Open file
+}
+
+void MainWindow::aboutFile()
+{
+	//TODO: Open Window with file information
+	QMessageBox* dialog = new QMessageBox(QMessageBox::Information, WINDOW_NAME, "File Info", QMessageBox::StandardButton::Close, this, Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint);
+	dialog->setDetailedText("This is the cool detailed text\n");
+	dialog->exec();
+}
+
+
+/////////////////////////////////////////////////////////////////////////
+// events
+
 void MainWindow::keyPressEvent(QKeyEvent * keyEvent)
 {
 	switch (keyEvent->key())

MeshViewerQt/Source/OpenGlViewer.cpp

@@ -1,25 +1,84 @@
 #include "OpenGlViewer.h"
 #include "defines.h"
+#include "Vertex.h"
+
+#include <iostream>
+
+static const Vertex sg_vertexes[] = {
+	Vertex(QVector3D(0.00f,  0.75f, 1.0f), QVector3D(1.0f, 0.0f, 0.0f)),
+	Vertex(QVector3D(0.75f, -0.75f, 1.0f), QVector3D(0.0f, 1.0f, 0.0f)),
+	Vertex(QVector3D(-0.75f, -0.75f, 1.0f), QVector3D(0.0f, 0.0f, 1.0f))
+};
 
 OpenGlViewer::OpenGlViewer(QWidget *parent)
 	: QOpenGLWidget(parent)
 {
 	QSurfaceFormat format;
+	format.setRenderableType(QSurfaceFormat::OpenGL);
+	format.setProfile(QSurfaceFormat::CompatibilityProfile);
 	format.setVersion(DEFAULT_MAJOR_VERSION, DEFAULT_MINOR_VERSION);
-	format.setProfile(QSurfaceFormat::CoreProfile);
-	this->setFormat(format);
 
+	setFormat(format);
 }
 
 OpenGlViewer::~OpenGlViewer()
 {
+	mVertexArray.destroy();
+	mVertexBuffer.destroy();
+	delete mProgram;
+}
+
+void OpenGlViewer::printContextInformation()
+{
+	QString glType;
+	QString glVersion;
+	QString glProfile;
+
+	glType = (context()->isOpenGLES()) ? "OpenGL ES" : "OpenGL";
+	glVersion = reinterpret_cast<const char*>(glGetString(GL_VERSION));
+
+#define CASE(c) case QSurfaceFormat::c: glProfile = #c; break
+	switch (format().profile())
+	{
+		CASE(NoProfile);
+		CASE(CoreProfile);
+		CASE(CompatibilityProfile);
+	}
+#undef CASE
+
+	std::cout << glType.toStdString() << " - " << glVersion.toStdString() << " (" << glProfile.toStdString() << ")";
 }
 
 void OpenGlViewer::initializeGL()
 {
 	initializeOpenGLFunctions();
+	printContextInformation();
 
+	//glEnable(GL_DEPTH_TEST);
 	glClearColor(DEAFAULT_BACKGROUND);
+
+	mProgram = new QOpenGLShaderProgram();
+	mProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/simple.vert");
+	mProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/simple.frag");
+	mProgram->link();
+	mProgram->bind();
+
+	mVertexBuffer.create();
+	mVertexBuffer.bind();
+	mVertexBuffer.setUsagePattern(QOpenGLBuffer::StaticDraw);
+	mVertexBuffer.allocate(sg_vertexes, sizeof(sg_vertexes));
+
+	mVertexArray.create();
+	mVertexArray.bind();
+	mProgram->enableAttributeArray(0);
+	mProgram->enableAttributeArray(1);
+	mProgram->setAttributeBuffer(0, GL_FLOAT, Vertex::positionOffset(), Vertex::PositionTupleSize, Vertex::stride());
+	mProgram->setAttributeBuffer(1, GL_FLOAT, Vertex::colorOffset(), Vertex::ColorTupleSize, Vertex::stride());
+
+	mVertexArray.release();
+	mVertexBuffer.release();
+	mProgram->release();
+
 }
 
 void OpenGlViewer::resizeGL(int w, int h)
@@ -30,5 +89,12 @@ void OpenGlViewer::resizeGL(int w, int h)
 void OpenGlViewer::paintGL()
 {
 	//TODO: paint here
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	mProgram->bind();
+	mVertexArray.bind();
+	glDrawArrays(GL_TRIANGLES, 0, sizeof(sg_vertexes) / sizeof(sg_vertexes[0]));
+	mVertexArray.release();
+	mProgram->release();
 }