Added: Analysis panel which shows the calculated frequency response of the filters for the selected device and channel.

Improved: GUIs of GraphicEQ and Copy command can now be resized
Improved: GraphicEQ GUI can now be zoomed separately in X and Y direction using mouse wheel on rulers. Also now shows values at mouse position.
Fixed: Original APO was not released when E-APO was shutting down, leading to a memory leak.

Editor/widgets/ResizeCorner.cpp

@@ -0,0 +1,52 @@
+/*
+	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 <QMouseEvent>
+
+#include "ResizeCorner.h"
+
+ResizeCorner::ResizeCorner(FilterTable* filterTable, QSize minimumSize, QSize maximumSize, std::function<QSize()> getFunc, std::function<void(QSize)> setFunc, QWidget *parent)
+	: QLabel(parent), minimumSize(minimumSize), maximumSize(maximumSize), getFunc(getFunc), setFunc(setFunc), filterTable(filterTable)
+{
+	setPixmap(QPixmap(":/icons/resize_corner.png"));
+	setCursor(Qt::SizeFDiagCursor);
+}
+
+void ResizeCorner::mousePressEvent(QMouseEvent* event)
+{
+	filterTable->setMinimumHeightHint(filterTable->height());
+	QSize size = getFunc();
+	offsetX = size.width() - event->globalX();
+	offsetY = size.height() - event->globalY();
+}
+
+void ResizeCorner::mouseMoveEvent(QMouseEvent* event)
+{
+	QSize size;
+	size.setWidth(offsetX + event->globalPos().x());
+	size.setHeight(offsetY + event->globalPos().y());
+	size = size.expandedTo(minimumSize);
+	size = size.boundedTo(maximumSize);
+	setFunc(size);
+}
+
+void ResizeCorner::mouseReleaseEvent(QMouseEvent*)
+{
+	filterTable->setMinimumHeightHint(0);
+}