[TASK] Prepare drawing a histogramm.

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.

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