tdesktop/Telegram/SourceFiles/boxes/backgroundbox.h

/*
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 "boxes/abstractbox.h"

namespace Ui {
class RoundCheckbox;
} // namespace Ui

class BackgroundBox : public BoxContent {
public:
	BackgroundBox(QWidget*);

protected:
	void prepare() override;

private:
	void backgroundChosen(int index);

	class Inner;
	QPointer<Inner> _inner;

};

// This class is hold in header because it requires Qt preprocessing.
class BackgroundBox::Inner : public TWidget, public RPCSender, private base::Subscriber {
public:
	Inner(QWidget *parent);

	void setBackgroundChosenCallback(base::lambda<void(int index)> &&callback) {
		_backgroundChosenCallback = std_::move(callback);
	}

	~Inner();

protected:
	void paintEvent(QPaintEvent *e) override;
	void mouseMoveEvent(QMouseEvent *e) override;
	void mousePressEvent(QMouseEvent *e) override;
	void mouseReleaseEvent(QMouseEvent *e) override;

private:
	void gotWallpapers(const MTPVector<MTPWallPaper> &result);
	void updateWallpapers();

	base::lambda<void(int index)> _backgroundChosenCallback;

	int _bgCount = 0;
	int _rows = 0;
	int _over = -1;
	int _overDown = -1;
	std_::unique_ptr<Ui::RoundCheckbox> _check; // this is not a widget

};