tdesktop/Telegram/SourceFiles/ui/effects/fade_animation.h

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/*
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
*/
#pragma once
#include "styles/style_widgets.h"
#include "ui/rp_widget.h"
namespace Ui {
class FadeAnimation {
public:
FadeAnimation(TWidget *widget, bool scaled = false);
bool paint(Painter &p);
void refreshCache();
using FinishedCallback = base::lambda<void()>;
void setFinishedCallback(FinishedCallback &&callback);
using UpdatedCallback = base::lambda<void(float64)>;
void setUpdatedCallback(UpdatedCallback &&callback);
void show();
void hide();
void fadeIn(int duration);
void fadeOut(int duration);
void finish() {
stopAnimation();
}
bool animating() const {
return _animation.animating();
}
bool visible() const {
return _visible;
}
private:
void startAnimation(int duration);
void stopAnimation();
void updateCallback();
QPixmap grabContent();
TWidget *_widget = nullptr;
bool _scaled = false;
Animation _animation;
QSize _size;
QPixmap _cache;
bool _visible = false;
FinishedCallback _finishedCallback;
UpdatedCallback _updatedCallback;
};
} // namespace Ui