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pcmanfm-qt-packaging/libfm-qt/icontheme.h

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/*
<one line to give the library's name and an idea of what it does.>
Copyright (C) 2012 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef FM_ICONTHEME_H
#define FM_ICONTHEME_H
#include "libfmqtglobals.h"
#include <QIcon>
#include <QString>
#include "libfm/fm.h"
namespace Fm {
// NOTE:
// Qt seems to has its own QIcon pixmap caching mechanism internally.
// Besides, it also caches QIcon objects created by QIcon::fromTheme().
// So maybe we should not duplicate the work.
// See http://qt.gitorious.org/qt/qt/blobs/4.8/src/gui/image/qicon.cpp
// QPixmap QPixmapIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state).
// In addition, QPixmap is actually stored in X11 server, not client side.
// Hence maybe we should not cache too many pixmaps, I guess?
// Let's have Qt do its work and only translate GIcon to QIcon here.
// Nice article about QPixmap from KDE: http://techbase.kde.org/Development/Tutorials/Graphics/Performance
class LIBFM_QT_API IconTheme: public QObject {
Q_OBJECT
public:
IconTheme();
~IconTheme();
static IconTheme* instance();
static QIcon icon(FmIcon* fmicon);
static QIcon icon(GIcon* gicon);
static void checkChanged(); // check if current icon theme name is changed
Q_SIGNALS:
void changed(); // emitted when the name of current icon theme is changed
protected:
bool eventFilter(QObject *obj, QEvent *event);
static QIcon convertFromGIcon(GIcon* gicon);
static QIcon iconFromNames(const char * const * names);
protected:
QIcon fallbackIcon_;
QString currentThemeName_;
};
}
#endif // FM_ICONTHEME_H