From d7002724cbeb77486c2d5a0ccad2c2a1f14cbf36 Mon Sep 17 00:00:00 2001
From: Joel Holdsworth <joel@airwebreathe.org.uk>
Date: Sat, 26 May 2012 09:21:55 +0100
Subject: [PATCH] Made SigView into a QGLWidget

---
 mainwindow.ui  |  2 +-
 sigrok-qt2.pro |  2 +-
 sigview.cpp    | 28 +++++++++++++++++++++++++++-
 sigview.h      | 15 ++++++++++++---
 4 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/mainwindow.ui b/mainwindow.ui
index 566c6dab..5f11fb2a 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -55,7 +55,7 @@
  <customwidgets>
   <customwidget>
    <class>SigView</class>
-   <extends>QAbstractScrollArea</extends>
+   <extends>QGLWidget</extends>
    <header>sigview.h</header>
   </customwidget>
  </customwidgets>
diff --git a/sigrok-qt2.pro b/sigrok-qt2.pro
index ac5ea48f..7993c936 100644
--- a/sigrok-qt2.pro
+++ b/sigrok-qt2.pro
@@ -4,7 +4,7 @@
 #
 #-------------------------------------------------
 
-QT       += core gui
+QT       += core gui opengl
 
 TARGET = sigrok-qt2
 TEMPLATE = app
diff --git a/sigview.cpp b/sigview.cpp
index ac7e76c8..c83ea791 100644
--- a/sigview.cpp
+++ b/sigview.cpp
@@ -21,6 +21,32 @@
 #include "sigview.h"
 
 SigView::SigView(QWidget *parent) :
-	QAbstractScrollArea(parent)
+	QGLWidget(parent)
 {
+	setMouseTracking(true);
+}
+
+void SigView::initializeGL()
+{
+	glDisable(GL_TEXTURE_2D);
+	glDisable(GL_DEPTH_TEST);
+	glDisable(GL_COLOR_MATERIAL);
+	glEnable(GL_BLEND);
+	glEnable(GL_POLYGON_SMOOTH);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	glClearColor(1.0, 1.0, 1.0, 0);
+}
+
+void SigView::resizeGL(int width, int height)
+{
+	glViewport(0, 0, (GLint)width, (GLint)height);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(0, width, height, 0, -1, 1);
+	glMatrixMode(GL_MODELVIEW);
+}
+
+void SigView::paintGL()
+{
+	glClear(GL_COLOR_BUFFER_BIT);
 }
diff --git a/sigview.h b/sigview.h
index 318104b9..d2bdbe4d 100644
--- a/sigview.h
+++ b/sigview.h
@@ -21,14 +21,23 @@
 #ifndef SIGVIEW_H
 #define SIGVIEW_H
 
-#include <QAbstractScrollArea>
+#include <QtOpenGL/QGLWidget>
+#include <QTimer>
 
-class SigView : public QAbstractScrollArea
+class SigView : public QGLWidget
 {
 	Q_OBJECT
 public:
 	explicit SigView(QWidget *parent = 0);
-	
+
+protected:
+
+	void initializeGL();
+
+	void resizeGL(int width, int height);
+
+	void paintGL();
+
 signals:
 	
 public slots:
-- 
2.30.2