81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
/*
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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 "helpers/GainIterator.h"
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#include "AnalysisPlotScene.h"
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#include "AnalysisPlotView.h"
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using namespace std;
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AnalysisPlotView::AnalysisPlotView(QWidget* parent)
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: FrequencyPlotView(parent)
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{
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}
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void AnalysisPlotView::drawBackground(QPainter* painter, const QRectF& rect)
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{
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FrequencyPlotView::drawBackground(painter, rect);
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painter->setRenderHint(QPainter::Antialiasing, true);
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AnalysisPlotScene* s = qobject_cast<AnalysisPlotScene*>(scene());
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std::vector<FilterNode>& nodes = s->getNodes();
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GainIterator gainIterator(nodes);
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QPainterPath path;
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bool first = true;
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double lastDb = -1000;
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for (int x = rect.left() - 1; x <= rect.right() + 1; x++)
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{
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double hz = s->xToHz(x);
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double db = gainIterator.gainAt(hz);
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double y = s->dbToY(db);
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if (db == lastDb)
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y = floor(y) + 0.5;
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lastDb = db;
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if (first)
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{
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path.moveTo(x, y);
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first = false;
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}
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else
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{
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path.lineTo(x, y);
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}
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}
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path.lineTo(rect.right() + 1, rect.bottom() + 1);
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path.lineTo(rect.left() - 1, rect.bottom() + 1);
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double thresholdY = s->dbToY(0);
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if (rect.top() < thresholdY)
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{
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QPainterPath rectPath;
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rectPath.addRect(rect.left(), rect.top(), rect.width(), min(thresholdY - rect.top(), rect.height()));
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QPainterPath clippingPath = path.intersected(rectPath);
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painter->setPen(Qt::NoPen);
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painter->setBrush(Qt::red);
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painter->drawPath(clippingPath);
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painter->setBrush(Qt::NoBrush);
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}
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painter->setPen(Qt::black);
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painter->drawPath(path);
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}
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