nheko/src/TrayIcon.cc

/*
 * nheko Copyright (C) 2017  Konstantinos Sideris <siderisk@auth.gr>
 *
 * This program 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.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <QApplication>
#include <QTimer>

#include "TrayIcon.h"

#if defined(Q_OS_MAC)
#include <QtMacExtras>
#endif

MsgCountComposedIcon::MsgCountComposedIcon(const QString &filename)
  : QIconEngine()
{
	icon_ = QIcon(filename);
}

void
MsgCountComposedIcon::paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state)
{
	painter->setRenderHint(QPainter::TextAntialiasing);
	painter->setRenderHint(QPainter::SmoothPixmapTransform);
	painter->setRenderHint(QPainter::Antialiasing);

	icon_.paint(painter, rect, Qt::AlignCenter, mode, state);

	if (msgCount <= 0)
		return;

	QColor backgroundColor("red");
	QColor textColor("white");

	QBrush brush;
	brush.setStyle(Qt::SolidPattern);
	brush.setColor(backgroundColor);

	painter->setBrush(brush);
	painter->setPen(Qt::NoPen);
	painter->setFont(QFont("Open Sans", 8, QFont::Black));

	QRectF bubble(rect.width() - BubbleDiameter, rect.height() - BubbleDiameter, BubbleDiameter, BubbleDiameter);
	painter->drawEllipse(bubble);
	painter->setPen(QPen(textColor));
	painter->setBrush(Qt::NoBrush);
	painter->drawText(bubble, Qt::AlignCenter, QString::number(msgCount));
}

QIconEngine *
MsgCountComposedIcon::clone() const
{
	return new MsgCountComposedIcon(*this);
}

TrayIcon::TrayIcon(const QString &filename, QWidget *parent)
  : QSystemTrayIcon(parent)
{
#if defined(Q_OS_MAC) || defined(Q_OS_WIN)
	setIcon(QIcon(filename));
#else
	icon_ = new MsgCountComposedIcon(filename);
	setIcon(QIcon(icon_));
#endif

	QMenu *menu = new QMenu(parent);
	viewAction_ = new QAction(tr("Show"), parent);
	quitAction_ = new QAction(tr("Quit"), parent);

	connect(viewAction_, SIGNAL(triggered()), parent, SLOT(show()));
	connect(quitAction_, &QAction::triggered, this, [=]() { QApplication::quit(); });

	menu->addAction(viewAction_);
	menu->addAction(quitAction_);

	setContextMenu(menu);

	// We wait a little for the icon to load.
	QTimer::singleShot(500, this, [=]() { show(); });
}

void
TrayIcon::setUnreadCount(int count)
{
// Use the native badge counter in MacOS.
#if defined(Q_OS_MAC)
	if (count == 0)
		QtMac::setBadgeLabelText("");
	else
		QtMac::setBadgeLabelText(QString::number(count));
#elif defined(Q_OS_WIN)
// FIXME: Find a way to use Windows apis for the badge counter (if any).
#else
	// Custom drawing on Linux.
	// FIXME: It doesn't seem to work on KDE.
	MsgCountComposedIcon *tmp = static_cast<MsgCountComposedIcon *>(icon_->clone());
	tmp->msgCount = count;

	setIcon(QIcon(tmp));

	icon_ = tmp;
#endif
}