83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "ui/effects/outline_segments.h"
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namespace Ui {
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void PaintOutlineSegments(
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QPainter &p,
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QRectF ellipse,
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const std::vector<OutlineSegment> &segments,
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float64 fromFullProgress) {
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Expects(!segments.empty());
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p.setBrush(Qt::NoBrush);
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const auto count = int(segments.size());
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if (count == 1) {
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p.setPen(QPen(segments.front().brush, segments.front().width));
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p.drawEllipse(ellipse);
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return;
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}
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const auto small = 160;
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const auto full = arc::kFullLength;
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const auto separator = (full > 1.1 * small * count)
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? small
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: (full / (count * 1.1));
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const auto left = full - (separator * count);
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const auto length = left / float64(count);
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const auto step = length + separator;
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const auto spin = separator * (1. - fromFullProgress);
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auto start = 0. + (arc::kQuarterLength + (separator / 2)) + (3. * spin);
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auto pen = QPen(
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segments.back().brush,
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segments.back().width,
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Qt::SolidLine,
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Qt::RoundCap);
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p.setPen(pen);
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for (auto i = 0; i != count;) {
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const auto &segment = segments[count - (++i)];
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if (!segment.width) {
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start += length + separator;
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continue;
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} else if (pen.brush() != segment.brush
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|| pen.widthF() != segment.width) {
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pen = QPen(
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segment.brush,
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segment.width,
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Qt::SolidLine,
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Qt::RoundCap);
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p.setPen(pen);
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}
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const auto from = int(base::SafeRound(start));
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const auto till = start + length;
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auto added = spin;
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for (; i != count;) {
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start += length + separator;
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const auto &next = segments[count - (++i)];
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if (next.width) {
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--i;
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break;
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}
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added += (separator + length) * (1. - fromFullProgress);
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}
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p.drawArc(ellipse, from, int(base::SafeRound(till + added)) - from);
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}
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}
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QLinearGradient UnreadStoryOutlineGradient(QRectF rect) {
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auto result = QLinearGradient(rect.topRight(), rect.bottomLeft());
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result.setStops({
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{ 0., st::groupCallLive1->c },
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{ 1., st::groupCallMuted1->c },
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});
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return result;
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}
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} // namespace Ui
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