Version 1.0

Added: Configuration Editor, which allows to edit configurations in a graphical user interface. Contains GUIs for most commands supported by E-APO, but as lines can also be edited directly, all commands can be used.
Added: Command "GraphicEQ", which can act as a regular, fixed-band graphic equalizer (via the GUI) but also supports variable bands so that any desired frequency response can be specified. Internally, it is implemented via convolution with a generated IR.
Added: Command "Convolution", which allows to convolve the signal with a user-provided impulse response to achieve e.g. equalization or reverberation effects.
Improved: Configurator performs checks for registry values that are needed for the operation of E-APO, which may be changed by driver installations, fixing the values if necessary.
Improved: Configurator shows which is the default device as a hint to the user.

Editor/widgets/FrequencyPlotVRuler.cpp

@@ -0,0 +1,60 @@
+/*
+	This file is part of EqualizerAPO, a system-wide equalizer.
+	Copyright (C) 2015  Jonas Thedering
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License along
+	with this program; if not, write to the Free Software Foundation, Inc.,
+	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "FrequencyPlotView.h"
+#include "FrequencyPlotScene.h"
+#include "FrequencyPlotVRuler.h"
+
+FrequencyPlotVRuler::FrequencyPlotVRuler(QWidget *parent) :
+	QWidget(parent)
+{
+}
+
+void FrequencyPlotVRuler::paintEvent(QPaintEvent*)
+{
+	QPainter painter(this);
+	FrequencyPlotView* view = qobject_cast<FrequencyPlotView*>(parentWidget());
+	FrequencyPlotScene* scene = view->scene();
+
+	QPointF topLeft = view->mapToScene(0, 0);
+	QPointF bottomRight = view->mapToScene(view->viewport()->width(), view->viewport()->height());
+	double dbHeight = abs(scene->yToDb(topLeft.y()) - scene->yToDb(bottomRight.y()));
+	double dbStep = dbHeight / 4;
+
+	double dbBase = pow(10, floor(log10(dbStep)));
+	if(dbStep >= 5 * dbBase)
+		dbStep = 5 * dbBase;
+	else if(dbStep >= 2 * dbBase)
+		dbStep = 2 * dbBase;
+	else
+		dbStep = dbBase;
+
+	double fromDb = floor(scene->yToDb(topLeft.y()) / dbStep) * dbStep;
+	double toDb = ceil(scene->yToDb(bottomRight.y()) / dbStep) * dbStep;
+
+	painter.setPen(QColor(50, 50, 50));
+	for(double db = toDb; db <= fromDb; db += dbStep)
+	{
+		if(abs(db) < 1e-6)
+			db = 0;
+		double y = scene->dbToY(db);
+		if(y != -1)
+			painter.drawText(0, y - topLeft.y() - 1, width(), 0, Qt::TextDontClip | Qt::AlignCenter, QString("%0").arg(db));
+	}
+}