From 2d7b4377587292f4c64c8ba732c1b0fad7334e4d Mon Sep 17 00:00:00 2001
From: Jan Philipp Timme <jan.philipp@timme.it>
Date: Fri, 30 Oct 2015 13:58:51 +0100
Subject: [PATCH] [TASK] Prepare drawing a histogramm.

---
 imageviewer-qt4.cpp | 15 +++++++++++++++
 imageviewer-qt4.h   |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/imageviewer-qt4.cpp b/imageviewer-qt4.cpp
index 94fb3f5..c3a9038 100644
--- a/imageviewer-qt4.cpp
+++ b/imageviewer-qt4.cpp
@@ -46,6 +46,7 @@
  */
 ImageViewer::ImageViewer() {
   image=NULL;
+  histogramm=NULL;
   startLogging();
   generateMainGui();
   renewLogging();
@@ -215,6 +216,20 @@ int ImageViewer::getIntensityVariance() {
   return (int) (sumDifference/(image->width()*image->height()));
 }
 
+/**
+ * Builds up the image for the histogramm.
+ * @brief ImageViewer::updateHistogramm
+ */
+void updateHistogramm() {
+  histogramm = new QImage(256, 100);
+  histogramm.fill(QColor::fromRgb(255,255,255));
+  for(int i=0; i<256; i++) {
+    
+  }
+  logFile << "Histogramm done." << std::endl;
+  renewLogging();
+}
+
 /**************************************************************************************** 
 *   
 *  GUI elements related to the tasks are set up here.
diff --git a/imageviewer-qt4.h b/imageviewer-qt4.h
index f3d10ad..c8efc64 100644
--- a/imageviewer-qt4.h
+++ b/imageviewer-qt4.h
@@ -87,7 +87,7 @@ class ImageViewer : public QMainWindow {
     // "My" space for storing data/results
     int grayscale_absolute_histogramm[256];
     double grayscale_relative_histogramm[256];    
-
+    QImage* histogramm;
 
   private slots:
     // Custom slots