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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2004-12-09
* Description : image selection widget used by ratio crop tool.
*
* Copyright (C) 2007 by Jaromir Malenko <malenko at email.cz>
* Copyright (C) 2008 by Roberto Castagnola <roberto dot castagnola at gmail dot com>
* Copyright (C) 2004-2009 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 IMAGESELECTIONWIDGET_H
#define IMAGESELECTIONWIDGET_H
// TQt includes.
#include <tqwidget.h>
#include <tqrect.h>
#include <tqcolor.h>
namespace Digikam
{
class ImageIface;
}
namespace DigikamImagesPluginCore
{
class ImageSelectionWidgetPriv;
class ImageSelectionWidget : public TQWidget
{
Q_OBJECT
public:
enum RatioAspect // Constrained Aspect Ratio list.
{
RATIOCUSTOM=0, // Custom aspect ratio.
RATIO01X01, // 1:1
RATIO02x03, // 2:3
RATIO03X04, // 3:4
RATIO04X05, // 4:5
RATIO05x07, // 5:7
RATIO07x10, // 7:10
RATIOGOLDEN, // Golden ratio : 1:1.618
RATIONONE // No aspect ratio.
};
enum Orient
{
Landscape = 0,
Portrait
};
enum CenterType
{
CenterWidth = 0, // Center selection to the center of image width.
CenterHeight, // Center selection to the center of image height.
CenterImage // Center selection to the center of image.
};
// Proportion : Golden Ratio and Rule of Thirds. More information at this url:
// http://photoinf.com/General/Robert_Berdan/Composition_and_the_Elements_of_Visual_Design.htm
enum GuideLineType
{
RulesOfThirds = 0, // Line guides position to 1/3 width and height.
DiagonalMethod, // Diagonal Method to improve composition.
HarmoniousTriangles, // Harmonious Triangle to improve composition.
GoldenMean, // Guides tools using Phi ratio (1.618).
GuideNone // No guide line.
};
public:
ImageSelectionWidget(int width, int height, TQWidget *parent=0,
int widthRatioValue=1, int heightRatioValue=1,
int aspectRatio=RATIO01X01, int orient=Landscape,
int guideLinesType=GuideNone);
~ImageSelectionWidget();
void setCenterSelection(int centerType=CenterImage);
void setSelectionX(int x);
void setSelectionY(int y);
void setSelectionWidth(int w);
void setSelectionHeight(int h);
void setSelectionOrientation(int orient);
void setPreciseCrop(bool precise);
void setAutoOrientation(bool orientation);
void setSelectionAspectRatioType(int aspectRatioType);
void setSelectionAspectRatioValue(int widthRatioValue, int heightRatioValue);
void setGoldenGuideTypes(bool drawGoldenSection, bool drawGoldenSpiralSection,
bool drawGoldenSpiral, bool drawGoldenTriangle,
bool flipHorGoldenGuide, bool flipVerGoldenGuide);
int getOriginalImageWidth();
int getOriginalImageHeight();
TQRect getRegionSelection();
int getMinWidthRange();
int getMinHeightRange();
int getMaxWidthRange();
int getMaxHeightRange();
int getWidthStep();
int getHeightStep();
bool preciseCropAvailable();
void resetSelection();
void maxAspectSelection();
Digikam::ImageIface* imageIface();
public slots:
void slotGuideLines(int guideLinesType);
void slotChangeGuideColor(const TQColor &color);
void slotChangeGuideSize(int size);
signals:
void signalSelectionMoved( TQRect rect );
void signalSelectionChanged( TQRect rect );
void signalSelectionOrientationChanged( int newOrientation );
protected:
void paintEvent( TQPaintEvent *e );
void mousePressEvent ( TQMouseEvent * e );
void mouseReleaseEvent ( TQMouseEvent * e );
void mouseMoveEvent ( TQMouseEvent * e );
void resizeEvent(TQResizeEvent * e);
private:
// Recalculate the target selection position and emit 'signalSelectionMoved'.
void regionSelectionMoved();
void regionSelectionChanged();
TQPoint convertPoint(const TQPoint pm, bool localToReal=true);
TQPoint convertPoint(int x, int y, bool localToReal=true);
void normalizeRegion();
void reverseRatioValues();
int computePreciseSize(int size, int step);
void applyAspectRatio(bool useHeight, bool repaintWidget=true);
void updatePixmap();
TQPoint opposite();
float distance(TQPoint a, TQPoint b);
void placeSelection(TQPoint pm, bool symetric, TQPoint center);
void setCursorResizing();
private:
ImageSelectionWidgetPriv* d;
};
} // NameSpace DigikamImagesPluginCore
#endif /* IMAGESELECTIONWIDGET_H */
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