106 lines
3.6 KiB
C++
106 lines
3.6 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 <QWheelEvent>
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#include "Editor/helpers/DPIHelper.h"
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#include "FrequencyPlotView.h"
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#include "FrequencyPlotScene.h"
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#include "FrequencyPlotVRuler.h"
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FrequencyPlotVRuler::FrequencyPlotVRuler(QWidget* parent)
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: QWidget(parent)
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{
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}
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void FrequencyPlotVRuler::paintEvent(QPaintEvent*)
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{
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing);
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FrequencyPlotView* view = qobject_cast<FrequencyPlotView*>(parentWidget());
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FrequencyPlotScene* s = view->scene();
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QPointF topLeft = view->mapToScene(0, 0);
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QPointF bottomRight = view->mapToScene(view->viewport()->width(), view->viewport()->height());
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double dbStep = abs(s->yToDb(0) - s->yToDb(DPIHelper::scale(30)));
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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(topLeft.y()) / dbStep) * dbStep;
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double toDb = ceil(s->yToDb(bottomRight.y()) / dbStep) * dbStep;
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painter.setPen(QColor(50, 50, 50));
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for (double db = toDb; db <= fromDb; db += dbStep)
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{
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if (abs(db) < 1e-6)
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db = 0;
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double y = s->dbToY(db);
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if (y != -1)
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painter.drawText(0, y - topLeft.y() - 1, width(), 0, Qt::TextDontClip | Qt::AlignCenter, QString("%0").arg(db));
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}
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QPoint mousePos = view->getLastMousePos();
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if (!mousePos.isNull())
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{
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QPointF mouseScenePos = view->mapToScene(mousePos);
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double db = s->yToDb(mouseScenePos.y());
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double y = s->dbToY(db);
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if (y != -1)
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{
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QString text = QString("%0").arg(db, 0, 'f', 1);
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QFontMetrics metrics = painter.fontMetrics();
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QRectF rect = metrics.boundingRect(text);
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float center = y - topLeft.y() - 1;
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rect = QRectF(ceil(width() / 2) - ceil(rect.width() / 2) - 2.5, center - rect.height() / 2 + 1, rect.width() + 3, rect.height());
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QPainterPath path;
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path.addRect(rect);
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QPainterPath rightTriangle;
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rightTriangle.moveTo(QPoint(rect.right(), center - 2));
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rightTriangle.lineTo(QPoint(rect.right(), center + 4));
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rightTriangle.lineTo(QPoint(rect.right() + 4, center + 1));
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path = path.united(rightTriangle);
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painter.setPen(Qt::black);
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painter.setBrush(Qt::white);
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painter.drawPath(path);
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painter.setPen(Qt::blue);
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painter.drawText(0, center, width() - 2, 0, Qt::TextDontClip | Qt::AlignCenter, text);
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}
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}
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}
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void FrequencyPlotVRuler::wheelEvent(QWheelEvent* event)
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{
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FrequencyPlotView* view = qobject_cast<FrequencyPlotView*>(parentWidget());
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view->zoom(0, event->angleDelta().y(), 0, event->y());
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}
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void FrequencyPlotVRuler::mouseMoveEvent(QMouseEvent* event)
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{
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FrequencyPlotView* view = qobject_cast<FrequencyPlotView*>(parentWidget());
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view->setLastMousePos(QPoint(0, fmin(event->y(), view->viewport()->height() - 1)));
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}
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