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-rw-r--r--krita/ui/kcurve.cc450
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diff --git a/krita/ui/kcurve.cc b/krita/ui/kcurve.cc
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--- a/krita/ui/kcurve.cc
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@@ -1,450 +0,0 @@
-/* ============================================================
- * Copyright 2004-2005 by Gilles Caulier
- * Copyright 2005 by Casper Boemann (reworked to be generic)
- *
- * 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.
- *
- * ============================================================ */
-
-// C++ includes.
-
-#include <cmath>
-#include <cstdlib>
-
-// TQt includes.
-
-#include <tqpixmap.h>
-#include <tqpainter.h>
-#include <tqpoint.h>
-#include <tqpen.h>
-#include <tqevent.h>
-#include <tqtimer.h>
-#include <tqrect.h>
-#include <tqfont.h>
-#include <tqfontmetrics.h>
-
-// KDE includes.
-
-#include <kdebug.h>
-#include <kcursor.h>
-#include <klocale.h>
-
-// Local includes.
-
-#include "kcurve.h"
-
-KCurve::KCurve(TQWidget *tqparent, const char *name, WFlags f)
- : TQWidget(tqparent, name, f)
-{
- m_grab_point = NULL;
- m_readOnlyMode = false;
- m_guideVisible = false;
- m_dragging = false;
- m_pix = NULL;
-
- setMouseTracking(true);
- setPaletteBackgroundColor(TQt::NoBackground);
- setMinimumSize(150, 50);
- TQPair<double,double> *p = new TQPair<double,double>;
- p->first = 0.0; p->second=0.0;
- m_points.append(p);
- p = new TQPair<double,double>;
- p->first = 1.0; p->second=1.0;
- m_points.append(p);
- m_points.setAutoDelete(true);
- setFocusPolicy(TQ_StrongFocus);
-}
-
-KCurve::~KCurve()
-{
- if (m_pix) delete m_pix;
-}
-
-void KCurve::reset(void)
-{
- m_grab_point = NULL;
- m_guideVisible = false;
- tqrepaint(false);
-}
-
-void KCurve::setCurveGuide(TQColor color)
-{
- m_guideVisible = true;
- m_colorGuide = color;
- tqrepaint(false);
-}
-
-void KCurve::setPixmap(TQPixmap pix)
-{
- if (m_pix) delete m_pix;
- m_pix = new TQPixmap(pix);
- tqrepaint(false);
-}
-
-void KCurve::keyPressEvent(TQKeyEvent *e)
-{
- if(e->key() == TQt::Key_Delete || e->key() == TQt::Key_Backspace)
- {
- TQPair<double,double> *closest_point=NULL;
- if(m_grab_point)
- {
- //first find closest point to get focus afterwards
- TQPair<double,double> *p = m_points.first();
- double distance = 1000; // just a big number
- while(p)
- {
- if(p!=m_grab_point)
- if (fabs (m_grab_point->first - p->first) < distance)
- {
- distance = fabs(m_grab_point->first - p->first);
- closest_point = p;
- }
- p = m_points.next();
- }
- m_points.remove(m_grab_point);
- }
- m_grab_point = closest_point;
- tqrepaint(false);
- }
- else
- TQWidget::keyPressEvent(e);
-}
-
-void KCurve::paintEvent(TQPaintEvent *)
-{
- int x, y;
- int wWidth = width();
- int wHeight = height();
-
- x = 0;
- y = 0;
-
- // Drawing selection or all histogram values.
- // A TQPixmap is used for enable the double buffering.
-
- TQPixmap pm(size());
- TQPainter p1;
- p1.begin(&pm, this);
-
- // draw background
- if(m_pix)
- {
- p1.scale(1.0*wWidth/m_pix->width(), 1.0*wHeight/m_pix->height());
- p1.drawPixmap(0, 0, *m_pix);
- p1.resetXForm();
- }
- else
- pm.fill();
-
- // Draw grid separators.
- p1.setPen(TQPen::TQPen(TQt::gray, 1, TQt::SolidLine));
- p1.drawLine(wWidth/3, 0, wWidth/3, wHeight);
- p1.drawLine(2*wWidth/3, 0, 2*wWidth/3, wHeight);
- p1.drawLine(0, wHeight/3, wWidth, wHeight/3);
- p1.drawLine(0, 2*wHeight/3, wWidth, 2*wHeight/3);
-
- // Draw curve.
- double curvePrevVal = getCurveValue(0.0);
- p1.setPen(TQPen::TQPen(TQt::black, 1, TQt::SolidLine));
- for (x = 0 ; x < wWidth ; x++)
- {
- double curveX;
- double curveVal;
-
- curveX = (x + 0.5) / wWidth;
-
- curveVal = getCurveValue(curveX);
-
- p1.drawLine(x - 1, wHeight - int(curvePrevVal * wHeight),
- x, wHeight - int(curveVal * wHeight));
-
- curvePrevVal = curveVal;
- }
- p1.drawLine(x - 1, wHeight - int(curvePrevVal * wHeight),
- x, wHeight - int(getCurveValue(1.0) * wHeight));
-
- // Drawing curve handles.
- if ( !m_readOnlyMode )
- {
- TQPair<double,double> *p = m_points.first();
-
- while(p)
- {
- double curveX = p->first;
- double curveY = p->second;
-
- if(p == m_grab_point)
- {
- p1.setPen(TQPen::TQPen(TQt::red, 3, TQt::SolidLine));
- p1.drawEllipse( int(curveX * wWidth) - 2,
- wHeight - 2 - int(curveY * wHeight), 4, 4 );
- }
- else
- {
- p1.setPen(TQPen::TQPen(TQt::red, 1, TQt::SolidLine));
-
- p1.drawEllipse( int(curveX * wWidth) - 3,
- wHeight - 3 - int(curveY * wHeight), 6, 6 );
- }
-
- p = m_points.next();
- }
- }
-
- p1.end();
- bitBlt(this, 0, 0, &pm);
-}
-
-void KCurve::mousePressEvent ( TQMouseEvent * e )
-{
- if (m_readOnlyMode) return;
-
- TQPair<double,double> *closest_point=NULL;
- double distance;
-
- if (e->button() != Qt::LeftButton)
- return;
-
- double x = e->pos().x() / (float)width();
- double y = 1.0 - e->pos().y() / (float)height();
-
- distance = 1000; // just a big number
-
- TQPair<double,double> *p = m_points.first();
- int insert_pos,pos=0;
- while(p)
- {
- if (fabs (x - p->first) < distance)
- {
- distance = fabs(x - p->first);
- closest_point = p;
- if(x < p->first)
- insert_pos = pos;
- else
- insert_pos = pos + 1;
- }
- p = m_points.next();
- pos++;
- }
-
-
- if(closest_point == NULL)
- {
- closest_point = new TQPair<double,double>;
- closest_point->first = x;
- closest_point->second = y;
- m_points.append(closest_point);
- }
- else if(distance * width() > 5)
- {
- closest_point = new TQPair<double,double>;
- closest_point->first = x;
- closest_point->second = y;
- m_points.insert(insert_pos, closest_point);
- }
- else
- if(fabs(y - closest_point->second) * width() > 5)
- return;
-
-
- m_grab_point = closest_point;
- m_grabOffsetX = m_grab_point->first - x;
- m_grabOffsetY = m_grab_point->second - y;
- m_grab_point->first = x + m_grabOffsetX;
- m_grab_point->second = y + m_grabOffsetY;
- m_dragging = true;
-
- setCursor( KCursor::crossCursor() );
-
- // Determine the leftmost and rightmost points.
- m_leftmost = 0;
- m_rightmost = 1;
-
- p = m_points.first();
- while(p)
- {
- if (p != m_grab_point)
- {
- if(p->first> m_leftmost && p->first < x)
- m_leftmost = p->first;
- if(p->first < m_rightmost && p->first > x)
- m_rightmost = p->first;
- }
- p = m_points.next();
- }
- tqrepaint(false);
-}
-
-void KCurve::mouseReleaseEvent ( TQMouseEvent * e )
-{
- if (m_readOnlyMode) return;
-
- if (e->button() != Qt::LeftButton)
- return;
-
- setCursor( KCursor::arrowCursor() );
- m_dragging = false;
- tqrepaint(false);
- emit modified();
-}
-
-void KCurve::mouseMoveEvent ( TQMouseEvent * e )
-{
- if (m_readOnlyMode) return;
-
- double x = e->pos().x() / (float)width();
- double y = 1.0 - e->pos().y() / (float)height();
-
- if (m_dragging == false) // If no point is selected set the the cursor tqshape if on top
- {
- double distance = 1000;
- double ydistance = 1000;
- TQPair<double,double> *p = m_points.first();
- while(p)
- {
- if (fabs (x - p->first) < distance)
- {
- distance = fabs(x - p->first);
- ydistance = fabs(y - p->second);
- }
- p = m_points.next();
- }
-
- if (distance * width() > 5 || ydistance * height() > 5)
- setCursor( KCursor::arrowCursor() );
- else
- setCursor( KCursor::crossCursor() );
- }
- else // Else, drag the selected point
- {
- setCursor( KCursor::crossCursor() );
-
- x += m_grabOffsetX;
- y += m_grabOffsetY;
-
- if (x <= m_leftmost)
- x = m_leftmost + 1E-4; // the addition so we can grab the dot later.
-
- if(x >= m_rightmost)
- x = m_rightmost - 1E-4;
-
- if(y > 1.0)
- y = 1.0;
-
- if(y < 0.0)
- y = 0.0;
-
- m_grab_point->first = x;
- m_grab_point->second = y;
-
- emit modified();
- }
-
- tqrepaint(false);
-}
-
-double KCurve::getCurveValue(double x)
-{
- return getCurveValue(m_points, x);
-}
-
-double KCurve::getCurveValue(TQPtrList<TQPair<double,double> > &curve, double x)
-{
- double t;
- TQPair<double,double> *p;
- TQPair<double,double> *p0,*p1,*p2,*p3;
- double c0,c1,c2,c3;
- double val;
-
- if(curve.count() == 0)
- return 0.5;
-
- // First find curve segment
- p = curve.first();
- if(x < p->first)
- return p->second;
-
- p = curve.last();
- if(x >= p->first)
- return p->second;
-
- // Find the four control points (two on each side of x)
- p = curve.first();
- while(x >= p->first)
- {
- p = curve.next();
- }
- curve.prev();
-
- if((p0 = curve.prev()) == NULL)
- p1 = p0 = curve.first();
- else
- p1 = curve.next();
-
- p2 = curve.next();
- if( (p = curve.next()) )
- p3 = p;
- else
- p3 = p2;
-
- // Calculate the value
- t = (x - p1->first) / (p2->first - p1->first);
- c2 = (p2->second - p0->second) * (p2->first-p1->first) / (p2->first-p0->first);
- c3 = p1->second;
- c0 = -2*p2->second + 2*c3 + c2 + (p3->second - p1->second) * (p2->first - p1->first) / (p3->first - p1->first);
- c1 = p2->second - c3 - c2 - c0;
- val = ((c0*t + c1)*t + c2)*t + c3;
-
- if(val < 0.0)
- val = 0.0;
- if(val > 1.0)
- val = 1.0;
- return val;
-}
-
-TQPtrList<TQPair<double,double> > KCurve::getCurve()
-{
- TQPtrList<TQPair<double,double> > outlist;
- TQPair<double,double> *p;
- TQPair<double,double> *outpoint;
-
- p = m_points.first();
- while(p)
- {
- outpoint = new TQPair<double,double>(p->first, p->second);
- outlist.append(outpoint);
- p = m_points.next();
- }
- return outlist;
-}
-
-void KCurve::setCurve(TQPtrList<TQPair<double,double> >inlist)
-{
- TQPair<double,double> *p;
- TQPair<double,double> *inpoint;
-
- m_points.clear();
-
- inpoint = inlist.first();
- while(inpoint)
- {
- p = new TQPair<double,double>(inpoint->first, inpoint->second);
- m_points.append(p);
- inpoint = inlist.next();
- }
-}
-
-void KCurve::leaveEvent( TQEvent * )
-{
-}
-
-#include "kcurve.moc"
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