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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2004-07-21
* Description : a widget to display an image histogram.
*
* Copyright (C) 2004-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
*
* 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, 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.
*
* ============================================================ */
#ifndef HISTOGRAMWIDGET_H
#define HISTOGRAMWIDGET_H
// TQt includes.
#include <tqwidget.h>
// Local includes.
#include "dcolor.h"
#include "digikam_export.h"
class TQCustomEvent;
namespace Digikam
{
class ImageHistogram;
class HistogramWidgetPriv;
class DIGIKAM_EXPORT HistogramWidget : public TQWidget
{
TQ_OBJECT
public:
enum HistogramType
{
ValueHistogram = 0, // Luminosity.
RedChannelHistogram, // Red channel.
GreenChannelHistogram, // Green channel.
BlueChannelHistogram, // Blue channel.
AlphaChannelHistogram, // Alpha channel.
ColorChannelsHistogram // All color channels.
};
enum HistogramScale
{
LinScaleHistogram=0, // Linear scale.
LogScaleHistogram // Logarithmic scale.
};
enum HistogramAllColorMode
{
RedColor=0, // Red color to foreground in All Colors Channel mode.
GreenColor, // Green color to foreground in All Colors Channel mode.
BlueColor // Blue color to foreground in All Colors Channel mode.
};
enum HistogramRenderingType
{
FullImageHistogram=0, // Full image histogram rendering.
ImageSelectionHistogram // Image selection histogram rendering.
};
public:
/** Constructor without image data. Needed to use updateData() method after to create instance.*/
HistogramWidget(int w, int h, // Widget size.
TQWidget *parent=0, bool selectMode=true,
bool showProgress=true,
bool statisticsVisible=false);
/** Constructor with image data and without image selection data.*/
HistogramWidget(int w, int h, // Widget size.
uchar *i_data, uint i_w, uint i_h, // Full image info.
bool i_sixteenBits, // 8 or 16 bits image.
TQWidget *parent=0, bool selectMode=true,
bool showProgress=true,
bool statisticsVisible=false);
/** Constructor with image data and image selection data.*/
HistogramWidget(int w, int h, // Widget size.
uchar *i_data, uint i_w, uint i_h, // Full image info.
uchar *s_data, uint s_w, uint s_h, // Image selection info.
bool i_sixteenBits, // 8 or 16 bits image.
TQWidget *parent=0, bool selectMode=true,
bool showProgress=true,
bool statisticsVisible=false);
void setup(int w, int h, bool selectMode=true,
bool showProgress=true,
bool statisticsVisible=false);
~HistogramWidget();
/** Stop current histogram computations.*/
void stopHistogramComputation(void);
/** Update full image histogram data methods.*/
void updateData(uchar *i_data, uint i_w, uint i_h,
bool i_sixteenBits, // 8 or 16 bits image.
uchar *s_data=0, uint s_w=0, uint s_h=0,
bool showProgress=true);
/** Update image selection histogram data methods.*/
void updateSelectionData(uchar *s_data, uint s_w, uint s_h,
bool i_sixteenBits, // 8 or 16 bits image.
bool showProgress=true);
void setDataLoading();
void setLoadingFailed();
void setHistogramGuideByColor(const DColor& color);
void reset();
public:
int m_channelType; // Channel type to draw.
int m_scaleType; // Scale to use for drawing.
int m_colorType; // Color to use for drawing in All Colors Channel mode.
int m_renderingType; // Using full image or image selection for histogram rendering.
ImageHistogram *m_imageHistogram; // Full image.
ImageHistogram *m_selectionHistogram; // Image selection.
signals:
void signalIntervalChanged(int min, int max);
void signalMaximumValueChanged(int);
void signalHistogramComputationDone(bool);
void signalHistogramComputationFailed();
public slots:
void slotMinValueChanged(int min);
void slotMaxValueChanged(int max);
protected slots:
void slotBlinkTimerDone();
protected:
void paintEvent(TQPaintEvent*);
void mousePressEvent(TQMouseEvent*);
void mouseReleaseEvent(TQMouseEvent*);
void mouseMoveEvent(TQMouseEvent*);
private :
void customEvent(TQCustomEvent*);
void notifyValuesChanged();
private:
HistogramWidgetPriv* d;
};
} // namespace Digikam
#endif /* HISTOGRAMWIDGET_H */
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