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80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017-2019 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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 as 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 V3 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 <QStylePainter>
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#include <QStyleOptionSlider>
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#include <math.h>
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#include "tickedslider.h"
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TickedSlider::TickedSlider(QWidget* parent) :
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QSlider(parent),
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m_tickColor(Qt::white)
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{ }
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void TickedSlider::paintEvent(QPaintEvent *ev)
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{
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(void) ev;
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QStylePainter p(this);
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QStyleOptionSlider opt;
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initStyleOption(&opt);
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QRect handle = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
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// draw tick marks
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// do this manually because they are very badly behaved with style sheets
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int interval = tickInterval();
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if (interval == 0)
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{
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interval = pageStep();
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}
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if (tickPosition() != NoTicks)
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{
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for (int i = minimum(); i <= maximum(); i += interval)
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{
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int x = roundf((double)((double)((double)(i - this->minimum()) / (double)(this->maximum() - this->minimum())) * (double)(this->width() - handle.width()) + (double)(handle.width() / 2.0))) - 1;
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int h = 4;
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p.setPen(m_tickColor);
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if (tickPosition() == TicksBothSides || tickPosition() == TicksAbove)
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{
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int y = this->rect().top();
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p.drawLine(x, y, x, y + h);
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}
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if (tickPosition() == TicksBothSides || tickPosition() == TicksBelow)
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{
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int y = this->rect().bottom();
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p.drawLine(x, y, x, y - h);
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}
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}
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}
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// draw the slider (this is basically copy/pasted from QSlider::paintEvent)
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opt.subControls = QStyle::SC_SliderGroove;
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p.drawComplexControl(QStyle::CC_Slider, opt);
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// draw the slider handle
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opt.subControls = QStyle::SC_SliderHandle;
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p.drawComplexControl(QStyle::CC_Slider, opt);
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}
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