src/gui/uithememanager.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2023-2024  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2019  Prince Gupta <jagannatharjun11@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  19  * USA.
  20  *
  21  * In addition, as a special exception, the copyright holders give permission to
  22  * link this program with the OpenSSL project's "OpenSSL" library (or with
  23  * modified versions of it that use the same license as the "OpenSSL" library),
  24  * and distribute the linked executables. You must obey the GNU General Public
  25  * License in all respects for all of the code used other than "OpenSSL".  If
  26  * you modify file(s), you may extend this exception to your version of the
  27  * file(s), but you are not obligated to do so. If you do not wish to do so,
  28  * delete this exception statement from your version.
  29  */
  30
  31 #pragma once
  32
  33 #include <QtSystemDetection>
  34 #include <QColor>
  35 #include <QHash>
  36 #include <QIcon>
  37 #include <QObject>
  38 #include <QPixmap>
  39 #include <QString>
  40
  41 #include "uithemesource.h"
  42
  43 class UIThemeManager final : public QObject
  44 {
  45     Q_OBJECT
  46     Q_DISABLE_COPY_MOVE(UIThemeManager)
  47
  48 public:
  49     static void initInstance();
  50     static void freeInstance();
  51     static UIThemeManager *instance();
  52
  53     QIcon getIcon(const QString &iconId, const QString &fallback = {}) const;
  54     QIcon getFlagIcon(const QString &countryIsoCode) const;
  55     QPixmap getScaledPixmap(const QString &iconId, int height) const;
  56
  57     QColor getColor(const QString &id) const;
  58
  59 signals:
  60     void themeChanged();
  61
  62 private:
  63     UIThemeManager(); // singleton class
  64
  65     void applyPalette() const;
  66     void applyStyleSheet() const;
  67     void onColorSchemeChanged();
  68
  69     static UIThemeManager *m_instance;
  70     const bool m_useCustomTheme;
  71 #if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS))
  72     const bool m_useSystemIcons;
  73 #endif
  74     std::unique_ptr<UIThemeSource> m_themeSource;
  75     mutable QHash<QString, QIcon> m_icons;
  76     mutable QHash<QString, QIcon> m_darkModeIcons;
  77     mutable QHash<QString, QIcon> m_flags;
  78 };