Some work about adaptive color scheme for Web UI (PR #19901) http://[316:c51a:62a3:8b9::4]/d4708/qBittorrent/src/branch/adaptive-webui
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/*
* Bittorrent Client using Qt4 and libtorrent.
* Copyright (C) 2006 Christophe Dumez
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* In addition, as a special exception, the copyright holders give permission to
* link this program with the OpenSSL project's "OpenSSL" library (or with
* modified versions of it that use the same license as the "OpenSSL" library),
* and distribute the linked executables. You must obey the GNU General Public
* License in all respects for all of the code used other than "OpenSSL". If you
* modify file(s), you may extend this exception to your version of the file(s),
* but you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* Contact : chris@qbittorrent.org
*/
#ifndef PIECEAVAILABILITYBAR_H
#define PIECEAVAILABILITYBAR_H
#include <QWidget>
#include <QPainter>
#include <QImage>
class PieceAvailabilityBar: public QWidget
{
Q_OBJECT
Q_DISABLE_COPY(PieceAvailabilityBar)
private:
QImage m_image;
// I used values, because it should be possible to change colors in runtime
// background color
int m_bgColor;
// border color
int m_borderColor;
// complete piece color
int m_pieceColor;
// buffered 256 levels gradient from bg_color to piece_color
QVector<int> m_pieceColors;
// last used int vector, uses to better resize redraw
// TODO: make a diff pieces to new pieces and update only changed pixels, speedup when update > 20x faster
QVector<int> m_pieces;
// scale int vector to float vector
QVector<float> intToFloatVector(const QVector<int> &vecin, int reqSize);
// mix two colors by light model, ratio <0, 1>
int mixTwoColors(int &rgb1, int &rgb2, float ratio);
// draw new image and replace actual image
void updateImage();
public:
PieceAvailabilityBar(QWidget *parent);
void setAvailability(const QVector<int> &avail);
void updatePieceColors();
void clear();
void setColors(int background, int border, int available);
protected:
void paintEvent(QPaintEvent *);
};
#endif // PIECEAVAILABILITYBAR_H