diff --git a/mainwindow.cpp b/mainwindow.cpp
index 71f6ce0..991b816 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -13,7 +13,7 @@ MainWindow::MainWindow()
     dock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
     addDockWidget(Qt::LeftDockWidgetArea, dock);
 
-    connect(dock->fileOpenButton, SIGNAL(clicked()), &spectrogram, SLOT(pickFile()));
+    connect(dock, SIGNAL(openFile(QString)), &spectrogram, SLOT(openFile(QString)));
     connect(dock->sampleRate, SIGNAL(textChanged(QString)), this, SLOT(setSampleRate(QString)));
     connect(dock, SIGNAL(fftSizeChanged(int)), this, SLOT(setFFTSize(int)));
     connect(dock->zoomLevelSlider, SIGNAL(valueChanged(int)), this, SLOT(setZoomLevel(int)));
diff --git a/spectrogram.cpp b/spectrogram.cpp
index 45e5eb0..e6e1ec4 100644
--- a/spectrogram.cpp
+++ b/spectrogram.cpp
@@ -2,7 +2,6 @@
 
 #include <QDebug>
 #include <QElapsedTimer>
-#include <QFileDialog>
 #include <QPainter>
 #include <QPaintEvent>
 #include <QRect>
@@ -29,11 +28,8 @@ QSize Spectrogram::sizeHint() const {
 	return QSize(1024, 2048);
 }
 
-void Spectrogram::pickFile()
+void Spectrogram::openFile(QString fileName)
 {
-	QString fileName = QFileDialog::getOpenFileName(
-		this, tr("Open File"), "", tr("Sample file (*.cfile *.bin);;All files (*)")
-	);
 	if (fileName != nullptr) {
 		try {
 			InputSource *newFile = new InputSource(fileName.toUtf8().constData());
@@ -42,7 +38,6 @@ void Spectrogram::pickFile()
 			resize(fftSize, getHeight());
 		} catch (std::runtime_error e) {
 			// TODO: display error
-			return;
 		}
 	}
 }
diff --git a/spectrogram.h b/spectrogram.h
index 256fe94..d9cc36e 100644
--- a/spectrogram.h
+++ b/spectrogram.h
@@ -19,7 +19,7 @@ public:
 	int getStride();
 
 public slots:
-	void pickFile();
+	void openFile(QString fileName);
 	void setSampleRate(int rate);
 	void setFFTSize(int size);
 	void setPowerMax(int power);
diff --git a/spectrogramcontrols.cpp b/spectrogramcontrols.cpp
index c57d4bc..bbdd84b 100644
--- a/spectrogramcontrols.cpp
+++ b/spectrogramcontrols.cpp
@@ -1,5 +1,6 @@
 #include "spectrogramcontrols.h"
 #include <QIntValidator>
+#include <QFileDialog>
 #include <QLabel>
 #include <cmath>
 
@@ -40,9 +41,18 @@ SpectrogramControls::SpectrogramControls(const QString & title, QWidget * parent
 	setWidget(widget);
 
 	connect(fftSizeSlider, SIGNAL(valueChanged(int)), this, SLOT(fftSizeSliderChanged(int)));
+	connect(fileOpenButton, SIGNAL(clicked()), this, SLOT(fileOpenButtonClicked()));
 }
 
 void SpectrogramControls::fftSizeSliderChanged(int size)
 {
 	emit fftSizeChanged((int)pow(2, size));
+}
+
+void SpectrogramControls::fileOpenButtonClicked()
+{
+	QString fileName = QFileDialog::getOpenFileName(
+		this, tr("Open File"), "", tr("Sample file (*.cfile *.bin);;All files (*)")
+	);
+	emit openFile(fileName);
 }
\ No newline at end of file
diff --git a/spectrogramcontrols.h b/spectrogramcontrols.h
index 7c278a7..623d5cb 100644
--- a/spectrogramcontrols.h
+++ b/spectrogramcontrols.h
@@ -14,9 +14,11 @@ public:
 
 signals:
 	void fftSizeChanged(int size);
+	void openFile(QString fileName);
 
 private slots:
 	void fftSizeSliderChanged(int size);
+	void fileOpenButtonClicked();
 
 private:
 	QWidget *widget;