From 6bc21d1e3f159a989fa1a2d9f723afc2b9e6dd05 Mon Sep 17 00:00:00 2001
From: Hannes Matuschek <hmatuschek@gmail.com>
Date: Sun, 30 Nov 2014 13:07:05 +0100
Subject: [PATCH 1/2] Fixed rotation of WaterfallView.

---
 src/gui/waterfallview.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/gui/waterfallview.cc b/src/gui/waterfallview.cc
index 8913338..1eed551 100644
--- a/src/gui/waterfallview.cc
+++ b/src/gui/waterfallview.cc
@@ -114,7 +114,13 @@ WaterFallView::_onSpectrumUpdated() {
   // Draw new spectrum
   for (size_t i=0; i<_N; i++) {
     int idx = (_spectrum->fftSize()/2+i) % _spectrum->fftSize();
-    double value = 10*log10(_spectrum->spectrum()[idx])-10*log10(_N);
+    double value;
+    if ((TOP_DOWN == _dir) || (RIGHT_LEFT == _dir)) {
+      value = 10*log10(_spectrum->spectrum()[_spectrum->fftSize()-1-idx])-10*log10(_N);
+    } else {
+      value = 10*log10(_spectrum->spectrum()[idx])-10*log10(_N);
+    }
+    // Reset NaNs
     if (value != value) { value = 0; }
     painter.setPen((*_colorMap)(value));
     painter.drawPoint(i, _M-1);

From 19f402df0e92bcbc815f0dafbd2c6db625117b56 Mon Sep 17 00:00:00 2001
From: Hannes Matuschek <hmatuschek@gmail.com>
Date: Sun, 30 Nov 2014 21:49:50 +0100
Subject: [PATCH 2/2] Fixed WaterfallView.

---
 src/gui/waterfallview.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/gui/waterfallview.cc b/src/gui/waterfallview.cc
index 1eed551..35449f8 100644
--- a/src/gui/waterfallview.cc
+++ b/src/gui/waterfallview.cc
@@ -147,15 +147,19 @@ WaterFallView::mouseReleaseEvent(QMouseEvent *evt) {
 }
 
 void
-WaterFallView::paintEvent(QPaintEvent *evt) {
+WaterFallView::paintEvent(QPaintEvent *evt)
+{
+  QWidget::paintEvent(evt);
+
   QPainter painter(this);
+
   painter.save();
   painter.setRenderHints(QPainter::SmoothPixmapTransform);
   // Draw transformed pixmap
   QTransform trafo;
   switch (_dir) {
   case BOTTOM_UP:
-    trafo *= trafo.scale(this->width()/qreal(_N), this->height()/qreal(_M));
+    trafo.scale(this->width()/qreal(_N), this->height()/qreal(_M));
     break;
   case LEFT_RIGHT:
     trafo.scale(this->width()/qreal(_M), this->height()/qreal(_N));