1 files changed, 366 insertions, 0 deletions
diff --git a/chalk/plugins/tools/tool_curves/kis_tool_bezier.cc b/chalk/plugins/tools/tool_curves/kis_tool_bezier.cc
new file mode 100644
index 00000000..e3baf49c
--- /dev/null
+++ b/chalk/plugins/tools/tool_curves/kis_tool_bezier.cc
@@ -0,0 +1,366 @@
+/*
+ *  kis_tool_bezier.cc -- part of Chalk
+ *
+ *  Copyright (c) 2006 Emanuele Tamponi <[email protected]>
+ *
+ *  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 <kaction.h>
+#include <kdebug.h>
+#include <klocale.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).tqcontains(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->tqfind(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"