98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop 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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It 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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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#include "ui/effects/radial_animation.h"
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namespace Ui {
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RadialAnimation::RadialAnimation(AnimationCallbacks &&callbacks)
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: a_arcStart(0, FullArcLength)
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, _animation(std::move(callbacks)) {
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}
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void RadialAnimation::start(float64 prg) {
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_firstStart = _lastStart = _lastTime = getms();
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int32 iprg = qRound(qMax(prg, 0.0001) * AlmostFullArcLength), iprgstrict = qRound(prg * AlmostFullArcLength);
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a_arcEnd = anim::value(iprgstrict, iprg);
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_animation.start();
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}
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void RadialAnimation::update(float64 prg, bool finished, TimeMs ms) {
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auto iprg = qRound(qMax(prg, 0.0001) * AlmostFullArcLength);
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if (iprg != qRound(a_arcEnd.to())) {
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a_arcEnd.start(iprg);
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_lastStart = _lastTime;
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}
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_lastTime = ms;
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auto dt = float64(ms - _lastStart);
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auto fulldt = float64(ms - _firstStart);
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_opacity = qMin(fulldt / st::radialDuration, 1.);
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if (!finished) {
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a_arcEnd.update(1. - (st::radialDuration / (st::radialDuration + dt)), anim::linear);
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} else if (dt >= st::radialDuration) {
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a_arcEnd.update(1., anim::linear);
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stop();
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} else {
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auto r = dt / st::radialDuration;
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a_arcEnd.update(r, anim::linear);
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_opacity *= 1 - r;
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}
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auto fromstart = fulldt / st::radialPeriod;
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a_arcStart.update(fromstart - std::floor(fromstart), anim::linear);
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}
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void RadialAnimation::stop() {
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_firstStart = _lastStart = _lastTime = 0;
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a_arcEnd = anim::value();
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_animation.stop();
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}
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void RadialAnimation::step(TimeMs ms) {
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_animation.step(ms);
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}
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void RadialAnimation::draw(Painter &p, const QRect &inner, int32 thickness, style::color color) {
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float64 o = p.opacity();
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p.setOpacity(o * _opacity);
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QPen pen(color->p), was(p.pen());
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pen.setWidth(thickness);
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pen.setCapStyle(Qt::RoundCap);
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p.setPen(pen);
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auto len = MinArcLength + qRound(a_arcEnd.current());
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auto from = QuarterArcLength - qRound(a_arcStart.current()) - len;
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if (rtl()) {
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from = QuarterArcLength - (from - QuarterArcLength) - len;
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if (from < 0) from += FullArcLength;
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}
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{
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PainterHighQualityEnabler hq(p);
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p.drawArc(inner, from, len);
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}
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p.setPen(was);
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p.setOpacity(o);
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}
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} // namespace Ui
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