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.
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/*
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This file is part of EqualizerAPO, a system-wide equalizer.
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Copyright (C) 2015 Jonas Thedering
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <algorithm>
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#include <QWheelEvent>
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#include <QScrollBar>
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#include "FrequencyPlotItem.h"
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#include "FrequencyPlotView.h"
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using namespace std;
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FrequencyPlotView::FrequencyPlotView(QWidget *parent) :
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QGraphicsView(parent)
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{
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setViewportMargins(20, 0, 0, 20);
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hRuler = new FrequencyPlotHRuler(this);
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vRuler = new FrequencyPlotVRuler(this);
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}
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FrequencyPlotScene* FrequencyPlotView::scene() const
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{
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return qobject_cast<FrequencyPlotScene*>(QGraphicsView::scene());
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}
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void FrequencyPlotView::setScene(FrequencyPlotScene* scene)
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{
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QGraphicsView::setScene(scene);
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}
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void FrequencyPlotView::drawBackground(QPainter* painter, const QRectF& drawRect)
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{
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painter->setRenderHint(QPainter::Antialiasing, false);
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QRectF rect = drawRect;
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if(!sceneRect().contains(rect))
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{
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rect = rect.intersected(sceneRect());
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painter->setClipRect(rect);
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}
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FrequencyPlotScene* s = scene();
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QPointF topLeft = mapToScene(0, 0);
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QPointF bottomRight = mapToScene(viewport()->width(), viewport()->height());
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double dbHeight = abs(s->yToDb(topLeft.y()) - s->yToDb(bottomRight.y()));
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double dbStep = dbHeight / 4;
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double dbBase = pow(10, floor(log10(dbStep)));
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if(dbStep >= 5 * dbBase)
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dbStep = 5 * dbBase;
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else if(dbStep >= 2 * dbBase)
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dbStep = 2 * dbBase;
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else
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dbStep = dbBase;
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double fromDb = floor(s->yToDb(rect.top() + rect.height()) / dbStep) * dbStep;
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double toDb = ceil(s->yToDb(rect.top()) / dbStep) * dbStep;
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painter->setPen(QColor(200, 200, 200));
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for(double db = fromDb; db <= toDb; db += dbStep)
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{
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double y = floor(s->dbToY(db)) + 0.5;
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if(y != -1)
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painter->drawLine(topLeft.x(), y, bottomRight.x(), y);
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}
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double fromHz = s->xToHz(rect.left());
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double toHz = s->xToHz(rect.left() + rect.width());
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const vector<double>& bands = s->getBands();
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if(bands.empty())
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{
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double hzBase = pow(10, floor(log10(fromHz)));
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fromHz = floor(fromHz / hzBase) * hzBase;
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fromHz += hzBase;
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if(round(fromHz / hzBase) >= 10)
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hzBase *= 10;
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for(double hz = fromHz; hz <= toHz;)
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{
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double x = floor(s->hzToX(hz)) + 0.5;
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if(x >= 0)
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painter->drawLine(x, topLeft.y(), x, bottomRight.y());
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hz += hzBase;
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if(round(hz / hzBase) >= 10)
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hzBase *= 10;
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}
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}
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else
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{
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vector<double>::const_iterator it = lower_bound(bands.cbegin(), bands.cend(), fromHz);
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for(; it != bands.cend() && *it < toHz; it++)
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{
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double hz = *it;
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double x = floor(s->hzToX(hz)) + 0.5;
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if(x >= 0)
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painter->drawLine(x, topLeft.y(), x, bottomRight.y());
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}
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}
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}
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void FrequencyPlotView::updateHRuler()
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{
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hRuler->update();
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}
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void FrequencyPlotView::wheelEvent(QWheelEvent* event)
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{
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FrequencyPlotScene* s = scene();
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QPointF scenePos = mapToScene(event->pos());
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double hz = s->xToHz(scenePos.x());
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double db = s->yToDb(scenePos.y());
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qreal zoomFactor = pow(1.001, event->angleDelta().y());
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s->setZoom(max(0.5, min(30, s->getZoom() * zoomFactor)));
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double x = s->hzToX(hz);
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if(x != -1)
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horizontalScrollBar()->setValue(horizontalScrollBar()->value() + round(x - scenePos.x()));
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double y = s->dbToY(db);
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if(y != -1)
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verticalScrollBar()->setValue(verticalScrollBar()->value() + round(y - scenePos.y()));
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resetCachedContent();
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viewport()->update();
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hRuler->update();
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vRuler->update();
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}
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void FrequencyPlotView::scrollContentsBy(int dx, int dy)
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{
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QGraphicsView::scrollContentsBy(dx, dy);
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if(dx != 0)
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hRuler->update();
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if(dy != 0)
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vRuler->update();
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}
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void FrequencyPlotView::resizeEvent(QResizeEvent* event)
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{
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QGraphicsView::resizeEvent(event);
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const QRect rect = viewport()->geometry();
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hRuler->setGeometry(rect.x() - 20, rect.y() + rect.height(), rect.width() + 20, 20);
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vRuler->setGeometry(rect.x() - 20, rect.y(), 20, rect.height() + 20);
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}
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void FrequencyPlotView::mousePressEvent(QMouseEvent* event)
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{
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QGraphicsView::mousePressEvent(event);
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lastMousePos = event->pos();
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}
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void FrequencyPlotView::mouseMoveEvent(QMouseEvent* event)
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{
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if(event->buttons() & Qt::RightButton)
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{
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horizontalScrollBar()->setValue(horizontalScrollBar()->value() - (event->x() - lastMousePos.x()));
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verticalScrollBar()->setValue(verticalScrollBar()->value() - (event->y() - lastMousePos.y()));
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}
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else
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{
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QGraphicsView::mouseMoveEvent(event);
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}
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lastMousePos = event->pos();
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}
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void FrequencyPlotView::showEvent(QShowEvent* event)
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{
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QGraphicsView::showEvent(event);
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horizontalScrollBar()->setValue(scene()->hzToX(20));
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}
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