mirror of
https://github.com/miek/inspectrum.git
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93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/*
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* Copyright (C) 2016, Mike Walters <mike@flomp.net>
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*
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* This file is part of inspectrum.
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*
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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 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <QDebug>
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#include "cursors.h"
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Cursors::Cursors(QObject * parent) : QObject::QObject(parent)
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{
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minCursor = new Cursor(Qt::Vertical, this);
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maxCursor = new Cursor(Qt::Vertical, this);
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connect(minCursor, &Cursor::posChanged, this, &Cursors::cursorMoved);
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connect(maxCursor, &Cursor::posChanged, this, &Cursors::cursorMoved);
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}
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void Cursors::cursorMoved()
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{
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// Swap cursors if one has been dragged past the other
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if (minCursor->pos() > maxCursor->pos()) {
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std::swap(minCursor, maxCursor);
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}
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emit cursorsMoved();
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}
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bool Cursors::mouseEvent(QEvent::Type type, QMouseEvent event)
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{
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if (minCursor->mouseEvent(type, event))
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return true;
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if (maxCursor->mouseEvent(type, event))
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return true;
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return false;
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}
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void Cursors::paintFront(QPainter &painter, QRect &rect, range_t<off_t> sampleRange)
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{
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painter.save();
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QRect cursorRect(minCursor->pos(), rect.top(), maxCursor->pos() - minCursor->pos(), rect.height());
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// Draw translucent white fill for highlight
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painter.fillRect(
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cursorRect,
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QBrush(QColor(255, 255, 255, 50))
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);
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// Draw vertical edges for individual segments
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painter.setPen(QPen(Qt::gray, 1, Qt::DashLine));
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for (int i = 1; i < segmentCount; i++) {
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int pos = minCursor->pos() + (i * cursorRect.width() / segmentCount);
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painter.drawLine(pos, rect.top(), pos, rect.bottom());
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}
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// Draw vertical edges
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painter.setPen(QPen(Qt::white, 1, Qt::SolidLine));
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painter.drawLine(minCursor->pos(), rect.top(), minCursor->pos(), rect.bottom());
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painter.drawLine(maxCursor->pos(), rect.top(), maxCursor->pos(), rect.bottom());
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painter.restore();
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}
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range_t<int> Cursors::selection()
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{
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return {minCursor->pos(), maxCursor->pos()};
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}
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void Cursors::setSegments(int segments)
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{
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segmentCount = std::max(segments, 1);
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}
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void Cursors::setSelection(range_t<int> selection)
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{
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minCursor->setPos(selection.minimum);
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maxCursor->setPos(selection.maximum);
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emit cursorsMoved();
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}
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