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koffice/chalk/plugins/tools/tool_curves/kis_tool_bezier.cpp

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/*
* kis_tool_bezier.cpp -- part of Chalk
*
* Copyright (c) 2006 Emanuele Tamponi <emanuele@valinor.it>
*
* 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.
*/
#include <math.h>
#include <tqpainter.h>
#include <tqlayout.h>
#include <tqrect.h>
#include <tdeaction.h>
#include <kdebug.h>
#include <tdelocale.h>
#include <kdebug.h>
#include <knuminput.h>
#include "kis_global.h"
#include "kis_doc.h"
#include "kis_painter.h"
#include "kis_point.h"
#include "kis_canvas_subject.h"
#include "kis_canvas_controller.h"
#include "kis_canvas.h"
#include "kis_canvas_painter.h"
#include "kis_cursor.h"
#include "kis_vec.h"
#include "kis_curve_framework.h"
#include "kis_tool_bezier.h"
KisCurve::iterator KisCurveBezier::groupEndpoint (KisCurve::iterator it) const
{
iterator temp = it;
if ((*it).hint() == BEZIERNEXTCONTROLHINT)
temp -= 1;
if ((*it).hint() == BEZIERPREVCONTROLHINT)
temp += 1;
return temp;
}
KisCurve::iterator KisCurveBezier::groupPrevControl (KisCurve::iterator it) const
{
iterator temp = it;
if ((*it).hint() == BEZIERENDHINT)
temp -= 1;
if ((*it).hint() == BEZIERNEXTCONTROLHINT)
temp -= 2;
return temp;
}
KisCurve::iterator KisCurveBezier::groupNextControl (KisCurve::iterator it) const
{
iterator temp = it;
if ((*it).hint() == BEZIERENDHINT)
temp += 1;
if ((*it).hint() == BEZIERPREVCONTROLHINT)
temp += 2;
return temp;
}
bool KisCurveBezier::groupSelected (KisCurve::iterator it) const
{
if ((*groupPrevControl(it)).isSelected() || (*groupEndpoint(it)).isSelected() || (*groupNextControl(it)).isSelected())
return true;
return false;
}
KisCurve::iterator KisCurveBezier::nextGroupEndpoint (KisCurve::iterator it) const
{
iterator temp = it;
if ((*it).hint() == BEZIERPREVCONTROLHINT) {
temp += 2;
temp = temp.nextPivot();
}
if ((*it).hint() == BEZIERENDHINT) {
temp += 1;
temp = temp.nextPivot();
}
if ((*it).hint() == BEZIERNEXTCONTROLHINT) {
temp = temp.nextPivot();
}
temp = temp.nextPivot();
return temp;
}
KisCurve::iterator KisCurveBezier::prevGroupEndpoint (KisCurve::iterator it) const
{
iterator temp = it;
if ((*it).hint() == BEZIERNEXTCONTROLHINT) {
temp -= 1;
temp = temp.previousPivot().previousPivot();
}
if ((*it).hint() == BEZIERENDHINT) {
temp = temp.previousPivot().previousPivot();
}
if ((*it).hint() == BEZIERPREVCONTROLHINT) {
temp = temp.previousPivot();
}
temp = temp.previousPivot();
return temp;
}
KisPoint KisCurveBezier::midpoint (const KisPoint& P1, const KisPoint& P2)
{
KisPoint temp;
temp.setX((P1.x()+P2.x())/2);
temp.setY((P1.y()+P2.y())/2);
return temp;
}
void KisCurveBezier::recursiveCurve (const KisPoint& P1, const KisPoint& P2, const KisPoint& P3,
const KisPoint& P4, int level, KisCurve::iterator it)
{
if (level > m_maxLevel) {
addPoint(it,midpoint(P1,P4),false,false,LINEHINT);
return;
}
KisPoint L1, L2, L3, L4;
KisPoint H, R1, R2, R3, R4;
L1 = P1;
L2 = midpoint(P1, P2);
H = midpoint(P2, P3);
R3 = midpoint(P3, P4);
R4 = P4;
L3 = midpoint(L2, H);
R2 = midpoint(R3, H);
L4 = midpoint(L3, R2);
R1 = L4;
recursiveCurve(L1, L2, L3, L4, level + 1, it);
recursiveCurve(R1, R2, R3, R4, level + 1, it);
}
void KisCurveBezier::calculateCurve(KisCurve::iterator tstart, KisCurve::iterator tend, KisCurve::iterator)
{
if (pivots().count() < 4)
return;
iterator origin, dest, control1, control2;
if ((*tstart).hint() == BEZIERENDHINT) {
origin = tstart;
control1 = tstart.nextPivot();
} else if ((*tstart).hint() == BEZIERNEXTCONTROLHINT) {
origin = tstart.previousPivot();
control1 = tstart;
} else if ((*tstart).hint() == BEZIERPREVCONTROLHINT) {
origin = tstart.nextPivot();
control1 = origin.nextPivot();
} else
return;
if ((*tend).hint() == BEZIERENDHINT) {
dest = tend;
control2 = tend.previousPivot();
} else if ((*tend).hint() == BEZIERPREVCONTROLHINT) {
dest = tend.nextPivot();
control2 = tend;
} else if ((*tend).hint() == BEZIERNEXTCONTROLHINT) {
dest = tend.previousPivot();
control2 = dest.previousPivot();
} else
return;
deleteCurve(control1,control2);
recursiveCurve((*origin).point(),(*control1).point(),(*control2).point(),(*dest).point(),1,control2);
}
KisCurve::iterator KisCurveBezier::pushPivot (const KisPoint& point)
{
iterator it;
it = pushPoint(point,true,false,BEZIERENDHINT);
if (count() > 1)
addPoint(it,point,true,false,BEZIERPREVCONTROLHINT);
it = pushPoint(point,true,false,BEZIERNEXTCONTROLHINT);
return selectPivot(it);
}
KisCurve::iterator KisCurveBezier::movePivot(KisCurve::iterator it, const KisPoint& newPt)
{
if (!(*it).isPivot())
return end();
int hint = (*it).hint();
iterator thisEnd, prevEnd, nextEnd;
thisEnd = groupEndpoint(it);
prevEnd = prevGroupEndpoint(it);
nextEnd = nextGroupEndpoint(it);
if (hint == BEZIERENDHINT) {
KisPoint trans = newPt - (*it).point();
(*thisEnd).setPoint((*thisEnd).point()+trans);
(*thisEnd.previous()).setPoint((*thisEnd.previous()).point()+trans);
(*thisEnd.next()).setPoint((*thisEnd.next()).point()+trans);
} else if (!(m_actionOptions & KEEPSELECTEDOPTION))
(*it).setPoint(newPt);
if (!(m_actionOptions & KEEPSELECTEDOPTION) && hint != BEZIERENDHINT) {
if (nextEnd == end() || (m_actionOptions & SYMMETRICALCONTROLSOPTION)) {
KisPoint trans = (*it).point() - (*thisEnd).point();
trans = KisPoint(-trans.x()*2,-trans.y()*2);
if (hint == BEZIERNEXTCONTROLHINT)
(*groupPrevControl(it)).setPoint(newPt+trans);
else
(*groupNextControl(it)).setPoint(newPt+trans);
}
}
if (nextEnd != end() && count() > 4)
calculateCurve (thisEnd,nextEnd,iterator());
if (prevEnd != thisEnd && count() > 4)
calculateCurve (prevEnd,thisEnd,iterator());
return it;
}
void KisCurveBezier::deletePivot (KisCurve::iterator it)
{
if (!(*it).isPivot())
return;
iterator prevControl,thisEnd,nextControl;
prevControl = prevGroupEndpoint(it).nextPivot();
thisEnd = groupEndpoint(it);
nextControl = nextGroupEndpoint(it).previousPivot();
if ((*thisEnd) == first()) {
deleteFirstPivot();
deleteFirstPivot();
deleteFirstPivot();
} else if ((*thisEnd.next()) == last()) {
deleteLastPivot();
deleteLastPivot();
deleteLastPivot();
} else {
deleteCurve(prevControl,nextControl);
calculateCurve(prevControl,nextControl,iterator());
}
}
KisToolBezier::KisToolBezier(const TQString& UIName)
: super(UIName)
{
m_derivated = new KisCurveBezier;
m_curve = m_derivated;
m_supportMinimalDraw = false;
m_transactionMessage = i18n("Bezier Curve");
}
KisToolBezier::~KisToolBezier()
{
}
KisCurve::iterator KisToolBezier::handleUnderMouse(const TQPoint& pos)
{
TQPoint qpos;
KisCurve pivs = m_curve->pivots(), inHandle;
KisCurve::iterator it;
int hint;
for (it = pivs.begin(); it != pivs.end(); it++) {
qpos = m_subject->canvasController()->windowToView((*it).point().toTQPoint());
hint = (*it).hint();
if (hint != BEZIERENDHINT && !m_derivated->groupSelected(it))
continue;
if (hint == BEZIERENDHINT && (m_actionOptions & SHIFTOPTION))
continue;
if (pivotRect(qpos).contains(pos)) {
inHandle.pushPoint((*it));
if (hint == BEZIERENDHINT && !(m_actionOptions & SHIFTOPTION))
break;
if (hint != BEZIERENDHINT && (m_actionOptions & SHIFTOPTION))
break;
}
}
if (inHandle.isEmpty())
return m_curve->end();
return m_curve->find(inHandle.last());
}
KisCurve::iterator KisToolBezier::drawPoint (KisCanvasPainter& gc, KisCurve::iterator point)
{
if ((*point).hint() != BEZIERENDHINT)
return ++point;
KisCanvasController *controller = m_subject->canvasController();
// Now draw the bezier
KisCurve::iterator origin,control1,control2,destination;
origin = point;
control1 = origin.next();
control2 = control1.nextPivot();
destination = control2.next();
if (control2 != m_curve->end()) {
point = control2;
TQPointArray vec(4);
vec[0] = controller->windowToView((*origin).point().toTQPoint());
vec[1] = controller->windowToView((*control1).point().toTQPoint());
vec[2] = controller->windowToView((*control2).point().toTQPoint());
vec[3] = controller->windowToView((*destination).point().toTQPoint());
gc.drawCubicBezier(vec);
}
point += 1;
return point;
}
void KisToolBezier::drawPivotHandle (KisCanvasPainter& gc, KisCurve::iterator point)
{
if ((*point).hint() != BEZIERENDHINT)
return;
KisCanvasController *controller = m_subject->canvasController();
TQPoint endpPos = controller->windowToView((*point).point().toTQPoint());
if (!m_derivated->groupSelected(point)) {
gc.setPen(m_pivotPen);
gc.drawRoundRect(pivotRect(endpPos),m_pivotRounding,m_pivotRounding);
} else {
TQPoint nextControlPos = controller->windowToView((*point.next()).point().toTQPoint());
TQPoint prevControlPos = controller->windowToView((*point.previousPivot()).point().toTQPoint());
gc.setPen(m_selectedPivotPen);
gc.drawRoundRect(selectedPivotRect(endpPos),m_selectedPivotRounding,m_selectedPivotRounding);
if ((prevControlPos != endpPos || nextControlPos != endpPos) && !(m_actionOptions & CONTROLOPTION)) {
gc.drawRoundRect(pivotRect(nextControlPos),m_pivotRounding,m_pivotRounding);
gc.drawLine(endpPos,nextControlPos);
gc.drawRoundRect(pivotRect(prevControlPos),m_pivotRounding,m_pivotRounding);
gc.drawLine(prevControlPos,endpPos);
}
}
gc.setPen(m_drawingPen);
}
#include "kis_tool_bezier.moc"