diff --git a/inspectrum.pro b/inspectrum.pro
index fd4aff8..9d012b4 100644
--- a/inspectrum.pro
+++ b/inspectrum.pro
@@ -4,4 +4,5 @@ TARGET = inspectrum
 TEMPLATE = app
 
 LIBS += -lfftw3f
-SOURCES += main.cpp inputsource.cpp
+HEADERS += mainwindow.h inputsource.h spectrogram.h
+SOURCES += main.cpp mainwindow.cpp inputsource.cpp spectrogram.cpp
diff --git a/main.cpp b/main.cpp
index 4e74b01..e67d24f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,34 +1,12 @@
 #include <QApplication>
-#include <QImage>
-#include <QGraphicsScene>
-#include <QGraphicsView>
-#include <QLabel>
-#include <stdio.h>
 
-#include "inputsource.h"
+#include "mainwindow.h"
 
 int main(int argc, char *argv[])
 {
-    const int width = 1024;
-    const int height = 256;
-
     QApplication a(argc, argv);
-    InputSource *input = new InputSource(argv[1], width);
-    QImage image(width, height, QImage::Format_RGB32);
-    float *data = (float*)malloc(width * height * sizeof(float));
-    input->GetViewport(data, 0, 0, width, height, 0);
-
-    for (int x = 0; x < width; x++) {
-        for (int y = 0; y < height; y++) {
-            *(image.scanLine(y) + x) = (int)data[y * width + x] * -4;
-        }
-    }
-
-    QLabel lbl;
-    lbl.setPixmap(QPixmap::fromImage(image));
-    lbl.show();
-
-
+    a.setApplicationName("inspectrum");
+    MainWindow mainWin;
+    mainWin.show();
     return a.exec();
-
 }
\ No newline at end of file
diff --git a/mainwindow.cpp b/mainwindow.cpp
new file mode 100644
index 0000000..409eb39
--- /dev/null
+++ b/mainwindow.cpp
@@ -0,0 +1,10 @@
+#include <QtWidgets>
+
+#include "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+    setWindowTitle(tr("inspectrum"));
+    scrollArea.setWidget(&spectrogram);
+    setCentralWidget(&scrollArea);
+}
diff --git a/mainwindow.h b/mainwindow.h
new file mode 100644
index 0000000..bc7628f
--- /dev/null
+++ b/mainwindow.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <QMainWindow>
+#include <QScrollArea>
+#include "spectrogram.h"
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+private:
+    QScrollArea scrollArea;
+    Spectrogram spectrogram;
+};
\ No newline at end of file
diff --git a/spectrogram.cpp b/spectrogram.cpp
new file mode 100644
index 0000000..0581e0c
--- /dev/null
+++ b/spectrogram.cpp
@@ -0,0 +1,45 @@
+#include "spectrogram.h"
+
+#include <QPainter>
+#include <QPaintEvent>
+#include <QRect>
+
+Spectrogram::Spectrogram()
+{
+	inputSource = new InputSource("/home/mike/Downloads/hubsan-chopped.cfile", 1024);
+	resize(inputSource->GetWidth(), inputSource->GetHeight());
+}
+
+Spectrogram::~Spectrogram()
+{
+	delete inputSource;
+}
+
+void Spectrogram::paintEvent(QPaintEvent *event)
+{
+	QRect rect = event->rect();
+	QPainter painter(this);
+	painter.fillRect(rect, Qt::black);
+
+	if (inputSource != nullptr) {
+		int width = inputSource->GetWidth();
+		int height = rect.height();
+
+		float *data = (float*)malloc(width * height * sizeof(float));
+
+		inputSource->GetViewport(data, 0, rect.y(), width, height, 0);
+
+		QImage image(width, height, QImage::Format_RGB32);
+		for (int y = 0; y < height; y++) {
+			for (int x = 0; x < width; x++) {
+				uint8_t pixel = data[y*width + x] * -3;
+				image.setPixel(x, y, qRgb(0, 0, pixel));
+			}
+		}
+
+		QPixmap pixmap = QPixmap::fromImage(image);
+		painter.drawPixmap(QRect(0, rect.y(), width, height), pixmap);
+
+		free(data);
+	}
+}
\ No newline at end of file
diff --git a/spectrogram.h b/spectrogram.h
new file mode 100644
index 0000000..165d11b
--- /dev/null
+++ b/spectrogram.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <QWidget>
+#include "inputsource.h"
+
+class Spectrogram : public QWidget {
+public:
+	Spectrogram();
+	~Spectrogram();
+
+protected:
+	void paintEvent(QPaintEvent *event);
+
+private:
+	InputSource *inputSource;
+};
\ No newline at end of file