tdesktop/Telegram/SourceFiles/media/player/media_player_button.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
#include "media/player/media_player_button.h"
#include "styles/style_widgets.h"
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namespace Media {
namespace Player {
PlayButtonLayout::PlayButtonLayout(const style::MediaPlayerButton &st, Fn<void()> callback)
: _st(st)
, _callback(std::move(callback)) {
}
void PlayButtonLayout::setState(State state) {
if (_nextState == state) return;
_nextState = state;
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if (!_transformProgress.animating()) {
_oldState = _state;
_state = _nextState;
_transformBackward = false;
if (_state != _oldState) {
startTransform(0., 1.);
if (_callback) _callback();
}
} else if (_oldState == _nextState) {
qSwap(_oldState, _state);
startTransform(_transformBackward ? 0. : 1., _transformBackward ? 1. : 0.);
_transformBackward = !_transformBackward;
}
}
void PlayButtonLayout::finishTransform() {
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_transformProgress.stop();
_transformBackward = false;
if (_callback) _callback();
}
void PlayButtonLayout::paint(Painter &p, const QBrush &brush) {
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if (_transformProgress.animating()) {
auto from = _oldState, to = _state;
auto backward = _transformBackward;
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auto progress = _transformProgress.value(1.);
if (from == State::Cancel || (from == State::Pause && to == State::Play)) {
qSwap(from, to);
backward = !backward;
}
if (backward) progress = 1. - progress;
Assert(from != to);
if (from == State::Play) {
if (to == State::Pause) {
paintPlayToPause(p, brush, progress);
} else {
Assert(to == State::Cancel);
paintPlayToCancel(p, brush, progress);
}
} else {
Assert(from == State::Pause && to == State::Cancel);
paintPauseToCancel(p, brush, progress);
}
} else {
switch (_state) {
case State::Play: paintPlay(p, brush); break;
case State::Pause: paintPlayToPause(p, brush, 1.); break;
case State::Cancel: paintPlayToCancel(p, brush, 1.); break;
}
}
}
void PlayButtonLayout::paintPlay(Painter &p, const QBrush &brush) {
auto playLeft = 0. + _st.playPosition.x();
auto playTop = 0. + _st.playPosition.y();
auto playWidth = _st.playOuter.width() - 2 * playLeft;
auto playHeight = _st.playOuter.height() - 2 * playTop;
PainterHighQualityEnabler hq(p);
p.setPen(Qt::NoPen);
QPainterPath pathPlay;
pathPlay.moveTo(playLeft, playTop);
pathPlay.lineTo(playLeft + playWidth, playTop + (playHeight / 2.));
pathPlay.lineTo(playLeft, playTop + playHeight);
pathPlay.lineTo(playLeft, playTop);
p.fillPath(pathPlay, brush);
}
void PlayButtonLayout::paintPlayToPause(Painter &p, const QBrush &brush, float64 progress) {
auto playLeft = 0. + _st.playPosition.x();
auto playTop = 0. + _st.playPosition.y();
auto playWidth = _st.playOuter.width() - 2 * playLeft;
auto playHeight = _st.playOuter.height() - 2 * playTop;
auto pauseLeft = 0. + _st.pausePosition.x();
auto pauseTop = 0. + _st.pausePosition.y();
auto pauseWidth = _st.pauseOuter.width() - 2 * pauseLeft;
auto pauseHeight = _st.pauseOuter.height() - 2 * pauseTop;
auto pauseStroke = 0. + _st.pauseStroke;
p.setPen(Qt::NoPen);
PainterHighQualityEnabler hq(p);
QPointF pathLeftPause[] = {
{ pauseLeft, pauseTop },
{ pauseLeft + pauseStroke, pauseTop },
{ pauseLeft + pauseStroke, pauseTop + pauseHeight },
{ pauseLeft, pauseTop + pauseHeight },
};
QPointF pathLeftPlay[] = {
{ playLeft, playTop },
{ playLeft + (playWidth / 2.), playTop + (playHeight / 4.) },
{ playLeft + (playWidth / 2.), playTop + (3 * playHeight / 4.) },
{ playLeft, playTop + playHeight },
};
p.fillPath(anim::interpolate(pathLeftPlay, pathLeftPause, progress), brush);
QPointF pathRightPause[] = {
{ pauseLeft + pauseWidth - pauseStroke, pauseTop },
{ pauseLeft + pauseWidth, pauseTop },
{ pauseLeft + pauseWidth, pauseTop + pauseHeight },
{ pauseLeft + pauseWidth - pauseStroke, pauseTop + pauseHeight },
};
QPointF pathRightPlay[] = {
{ playLeft + (playWidth / 2.), playTop + (playHeight / 4.) },
{ playLeft + playWidth, playTop + (playHeight / 2.) },
{ playLeft + playWidth, playTop + (playHeight / 2.) },
{ playLeft + (playWidth / 2.), playTop + (3 * playHeight / 4.) },
};
p.fillPath(anim::interpolate(pathRightPlay, pathRightPause, progress), brush);
}
void PlayButtonLayout::paintPlayToCancel(Painter &p, const QBrush &brush, float64 progress) {
static const auto sqrt2 = sqrt(2.);
auto playLeft = 0. + _st.playPosition.x();
auto playTop = 0. + _st.playPosition.y();
auto playWidth = _st.playOuter.width() - 2 * playLeft;
auto playHeight = _st.playOuter.height() - 2 * playTop;
auto cancelLeft = 0. + _st.cancelPosition.x();
auto cancelTop = 0. + _st.cancelPosition.y();
auto cancelWidth = _st.cancelOuter.width() - 2 * cancelLeft;
auto cancelHeight = _st.cancelOuter.height() - 2 * cancelTop;
auto cancelStroke = (0. + _st.cancelStroke) / sqrt2;
p.setPen(Qt::NoPen);
PainterHighQualityEnabler hq(p);
QPointF pathPlay[] = {
{ playLeft, playTop },
{ playLeft, playTop },
{ playLeft + (playWidth / 2.), playTop + (playHeight / 4.) },
{ playLeft + playWidth, playTop + (playHeight / 2.) },
{ playLeft + playWidth, playTop + (playHeight / 2.) },
{ playLeft + playWidth, playTop + (playHeight / 2.) },
{ playLeft + playWidth, playTop + (playHeight / 2.) },
{ playLeft + playWidth, playTop + (playHeight / 2.) },
{ playLeft + (playWidth / 2.), playTop + (3 * playHeight / 4.) },
{ playLeft, playTop + playHeight },
{ playLeft, playTop + playHeight },
{ playLeft, playTop + (playHeight / 2.) },
};
QPointF pathCancel[] = {
{ cancelLeft, cancelTop + cancelStroke },
{ cancelLeft + cancelStroke, cancelTop },
{ cancelLeft + (cancelWidth / 2.), cancelTop + (cancelHeight / 2.) - cancelStroke },
{ cancelLeft + cancelWidth - cancelStroke, cancelTop },
{ cancelLeft + cancelWidth, cancelTop + cancelStroke },
{ cancelLeft + (cancelWidth / 2.) + cancelStroke, cancelTop + (cancelHeight / 2.) },
{ cancelLeft + cancelWidth, cancelTop + cancelHeight - cancelStroke },
{ cancelLeft + cancelWidth - cancelStroke, cancelTop + cancelHeight },
{ cancelLeft + (cancelWidth / 2.), cancelTop + (cancelHeight / 2.) + cancelStroke },
{ cancelLeft + cancelStroke, cancelTop + cancelHeight },
{ cancelLeft, cancelTop + cancelHeight - cancelStroke },
{ cancelLeft + (cancelWidth / 2.) - cancelStroke, cancelTop + (cancelHeight / 2.) },
};
p.fillPath(anim::interpolate(pathPlay, pathCancel, progress), brush);
}
void PlayButtonLayout::paintPauseToCancel(Painter &p, const QBrush &brush, float64 progress) {
static const auto sqrt2 = sqrt(2.);
auto pauseLeft = 0. + _st.pausePosition.x();
auto pauseTop = 0. + _st.pausePosition.y();
auto pauseWidth = _st.pauseOuter.width() - 2 * pauseLeft;
auto pauseHeight = _st.pauseOuter.height() - 2 * pauseTop;
auto pauseStroke = 0. + _st.pauseStroke;
auto cancelLeft = 0. + _st.cancelPosition.x();
auto cancelTop = 0. + _st.cancelPosition.y();
auto cancelWidth = _st.cancelOuter.width() - 2 * cancelLeft;
auto cancelHeight = _st.cancelOuter.height() - 2 * cancelTop;
auto cancelStroke = (0. + _st.cancelStroke) / sqrt2;
p.setPen(Qt::NoPen);
PainterHighQualityEnabler hq(p);
QPointF pathLeftPause[] = {
{ pauseLeft, pauseTop },
{ pauseLeft + pauseStroke, pauseTop },
{ pauseLeft + pauseStroke, pauseTop + pauseHeight },
{ pauseLeft, pauseTop + pauseHeight },
};
QPointF pathLeftCancel[] = {
{ cancelLeft, cancelTop + cancelStroke },
{ cancelLeft + cancelStroke, cancelTop },
{ cancelLeft + cancelWidth, cancelTop + cancelHeight - cancelStroke },
{ cancelLeft + cancelWidth - cancelStroke, cancelTop + cancelHeight },
};
p.fillPath(anim::interpolate(pathLeftPause, pathLeftCancel, progress), brush);
QPointF pathRightPause[] = {
{ pauseLeft + pauseWidth - pauseStroke, pauseTop },
{ pauseLeft + pauseWidth, pauseTop },
{ pauseLeft + pauseWidth, pauseTop + pauseHeight },
{ pauseLeft + pauseWidth - pauseStroke, pauseTop + pauseHeight },
};
QPointF pathRightCancel[] = {
{ cancelLeft + cancelWidth - cancelStroke, cancelTop },
{ cancelLeft + cancelWidth, cancelTop + cancelStroke },
{ cancelLeft + cancelStroke, cancelTop + cancelHeight },
{ cancelLeft, cancelTop + cancelHeight - cancelStroke },
};
p.fillPath(anim::interpolate(pathRightPause, pathRightCancel, progress), brush);
}
void PlayButtonLayout::animationCallback() {
if (!_transformProgress.animating()) {
auto finalState = _nextState;
_nextState = _state;
setState(finalState);
}
_callback();
}
void PlayButtonLayout::startTransform(float64 from, float64 to) {
_transformProgress.start([this] { animationCallback(); }, from, to, st::mediaPlayerButtonTransformDuration);
}
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} // namespace Player
} // namespace Media