72 lines
2.9 KiB
C++
72 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/cross_animation.h"
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namespace Ui {
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void CrossAnimation::paint(Painter &p, const style::CrossAnimation &st, style::color color, int x, int y, int outerWidth, float64 shown) {
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PainterHighQualityEnabler hq(p);
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auto deleteScale = shown + st.minScale * (1. - shown);
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auto deleteSkip = deleteScale * st.skip + (1. - deleteScale) * (st.size / 2);
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auto sqrt2 = sqrt(2.);
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auto deleteLeft = rtlpoint(x + deleteSkip, 0, outerWidth).x() + 0.;
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auto deleteTop = y + deleteSkip + 0.;
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auto deleteWidth = st.size - 2 * deleteSkip;
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auto deleteHeight = st.size - 2 * deleteSkip;
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auto deleteStroke = st.stroke / sqrt2;
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QPointF pathDelete[] = {
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{ deleteLeft, deleteTop + deleteStroke },
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{ deleteLeft + deleteStroke, deleteTop },
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{ deleteLeft + (deleteWidth / 2.), deleteTop + (deleteHeight / 2.) - deleteStroke },
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{ deleteLeft + deleteWidth - deleteStroke, deleteTop },
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{ deleteLeft + deleteWidth, deleteTop + deleteStroke },
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{ deleteLeft + (deleteWidth / 2.) + deleteStroke, deleteTop + (deleteHeight / 2.) },
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{ deleteLeft + deleteWidth, deleteTop + deleteHeight - deleteStroke },
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{ deleteLeft + deleteWidth - deleteStroke, deleteTop + deleteHeight },
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{ deleteLeft + (deleteWidth / 2.), deleteTop + (deleteHeight / 2.) + deleteStroke },
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{ deleteLeft + deleteStroke, deleteTop + deleteHeight },
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{ deleteLeft, deleteTop + deleteHeight - deleteStroke },
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{ deleteLeft + (deleteWidth / 2.) - deleteStroke, deleteTop + (deleteHeight / 2.) },
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};
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if (shown < 1.) {
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auto alpha = -(shown - 1.) * M_PI_2;
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auto cosalpha = cos(alpha);
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auto sinalpha = sin(alpha);
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auto shiftx = deleteLeft + (deleteWidth / 2.);
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auto shifty = deleteTop + (deleteHeight / 2.);
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for (auto &point : pathDelete) {
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auto x = point.x() - shiftx;
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auto y = point.y() - shifty;
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point.setX(shiftx + x * cosalpha - y * sinalpha);
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point.setY(shifty + y * cosalpha + x * sinalpha);
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}
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}
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QPainterPath path;
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path.moveTo(pathDelete[0]);
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for (int i = 1; i != base::array_size(pathDelete); ++i) {
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path.lineTo(pathDelete[i]);
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}
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p.fillPath(path, color);
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}
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} // namespace Ui
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