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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2004-12-01
* Description : a widget to draw histogram curves
*
* 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 CURVESWIDGET_H
#define CURVESWIDGET_H
// TQt includes.
#include <tqwidget.h>
// Local includes.
#include "dcolor.h"
#include "digikam_export.h"
class TQCustomEvent;
namespace Digikam
{
class ImageHistogram;
class ImageCurves;
class CurvesWidgetPriv;
class DIGIKAM_EXPORT CurvesWidget : public TQWidget
{
TQ_OBJECT
public:
enum HistogramType
{
ValueHistogram = 0, // Luminosity.
RedChannelHistogram, // Red channel.
GreenChannelHistogram, // Green channel.
BlueChannelHistogram, // Blue channel.
AlphaChannelHistogram, // Alpha channel.
};
enum HistogramScale
{
LinScaleHistogram=0, // Linear scale.
LogScaleHistogram // Logarithmic scale.
};
public:
CurvesWidget(int w, int h, TQWidget *parent, bool readOnly=false);
CurvesWidget(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, // Parent widget instance.
bool readOnly=false); // If true : widget with full edition mode capabilities.
// If false : display curve data only without edition.
~CurvesWidget();
void setup(int w, int h, bool readOnly);
void updateData(uchar *i_data, uint i_w, uint i_h, bool i_sixteenBits);
// Stop current histogram computations.
void stopHistogramComputation();
void setDataLoading();
void setLoadingFailed();
void reset();
void curveTypeChanged();
void setCurveGuide(const DColor& color);
ImageCurves* curves() const;
public:
int m_channelType; // Channel type to draw.
int m_scaleType; // Scale to use for drawing.
ImageHistogram *m_imageHistogram;
signals:
void signalMouseMoved( int x, int y );
void signalCurvesChanged();
void signalHistogramComputationDone();
void signalHistogramComputationFailed();
protected slots:
void slotBlinkTimerDone();
protected:
void paintEvent(TQPaintEvent*);
void mousePressEvent(TQMouseEvent*);
void mouseReleaseEvent(TQMouseEvent*);
void mouseMoveEvent(TQMouseEvent*);
void leaveEvent(TQEvent*);
private:
void customEvent(TQCustomEvent *event);
private:
CurvesWidgetPriv* d;
};
} // NameSpace Digikam
#endif /* CURVESWIDGET_H */
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