tdesktop/Telegram/SourceFiles/ui/effects/cross_animation.cpp

73 lines
2.9 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "stdafx.h"
#include "ui/effects/cross_animation.h"
namespace Ui {
void CrossAnimation::paint(Painter &p, const style::CrossAnimation &st, style::color color, int x, int y, int outerWidth, float64 shown) {
PainterHighQualityEnabler hq(p);
auto deleteScale = shown + st.minScale * (1. - shown);
auto deleteSkip = deleteScale * st.skip + (1. - deleteScale) * (st.size / 2);
auto sqrt2 = sqrt(2.);
auto deleteLeft = rtlpoint(x + deleteSkip, 0, outerWidth).x() + 0.;
auto deleteTop = y + deleteSkip + 0.;
auto deleteWidth = st.size - 2 * deleteSkip;
auto deleteHeight = st.size - 2 * deleteSkip;
auto deleteStroke = st.stroke / sqrt2;
QPointF pathDelete[] = {
{ deleteLeft, deleteTop + deleteStroke },
{ deleteLeft + deleteStroke, deleteTop },
{ deleteLeft + (deleteWidth / 2.), deleteTop + (deleteHeight / 2.) - deleteStroke },
{ deleteLeft + deleteWidth - deleteStroke, deleteTop },
{ deleteLeft + deleteWidth, deleteTop + deleteStroke },
{ deleteLeft + (deleteWidth / 2.) + deleteStroke, deleteTop + (deleteHeight / 2.) },
{ deleteLeft + deleteWidth, deleteTop + deleteHeight - deleteStroke },
{ deleteLeft + deleteWidth - deleteStroke, deleteTop + deleteHeight },
{ deleteLeft + (deleteWidth / 2.), deleteTop + (deleteHeight / 2.) + deleteStroke },
{ deleteLeft + deleteStroke, deleteTop + deleteHeight },
{ deleteLeft, deleteTop + deleteHeight - deleteStroke },
{ deleteLeft + (deleteWidth / 2.) - deleteStroke, deleteTop + (deleteHeight / 2.) },
};
if (shown < 1.) {
auto alpha = -(shown - 1.) * M_PI_2;
auto cosalpha = cos(alpha);
auto sinalpha = sin(alpha);
auto shiftx = deleteLeft + (deleteWidth / 2.);
auto shifty = deleteTop + (deleteHeight / 2.);
for (auto &point : pathDelete) {
auto x = point.x() - shiftx;
auto y = point.y() - shifty;
point.setX(shiftx + x * cosalpha - y * sinalpha);
point.setY(shifty + y * cosalpha + x * sinalpha);
}
}
QPainterPath path;
path.moveTo(pathDelete[0]);
for (int i = 1; i != base::array_size(pathDelete); ++i) {
path.lineTo(pathDelete[i]);
}
p.fillPath(path, color);
}
} // namespace Ui