1 /* This file is part of the KDE project
2 * Copyright (C) 2007 Jan Hambrecht <jaham@gmx.net>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include "KarbonWhirlPinchCommand.h"
21
22 #include <KoPathShape.h>
23 #include <KoPathPoint.h>
24
25 #include <klocalizedstring.h>
26 #include <math.h>
27
28 // the original data of a path point
29 struct PointData
30 {
PointDataPointData31 PointData(KoPathPoint * p)
32 {
33 KoPathShape * shape = p->parent();
34 // save points in document coordinates
35 oldNode = shape->shapeToDocument(p->point());
36 oldControlPoint1 = shape->shapeToDocument(p->controlPoint1());
37 oldControlPoint2 = shape->shapeToDocument(p->controlPoint2());
38 }
39
restorePointPointData40 void restorePoint(KoPathPoint * p)
41 {
42 KoPathShape * shape = p->parent();
43 p->setPoint(shape->documentToShape(oldNode));
44 if (p->activeControlPoint1())
45 p->setControlPoint1(shape->documentToShape(oldControlPoint1));
46 if (p->activeControlPoint2())
47 p->setControlPoint2(shape->documentToShape(oldControlPoint2));
48 }
49
50 QPointF oldNode;
51 QPointF oldControlPoint1;
52 QPointF oldControlPoint2;
53 };
54
55 class KarbonWhirlPinchCommand::Private
56 {
57 public:
Private(KoPathShape * path,qreal angle,qreal pinch,qreal radius)58 Private(KoPathShape * path, qreal angle, qreal pinch, qreal radius)
59 : pathShape(path), whirlAngle(angle), pinchAmount(pinch), effectRadius(radius)
60 {
61 effectCenter = pathShape->boundingRect().center();
62 if (pinchAmount < -1.0)
63 pinchAmount = -1.0;
64 else if (pinchAmount > 1.0)
65 pinchAmount = 1.0;
66 }
67
whirlPinch(const QPointF & point)68 QPointF whirlPinch(const QPointF &point)
69 {
70 // transform to document coordinates first
71 QPointF docPoint = pathShape->shapeToDocument(point);
72
73 QPointF delta = docPoint - effectCenter;
74 qreal distToCenter = sqrt(delta.x() * delta.x() + delta.y() * delta.y());
75
76 if (distToCenter < effectRadius) {
77 QTransform m;
78
79 distToCenter /= effectRadius;
80
81 qreal scale = pow(sin(M_PI_2 * distToCenter), -pinchAmount);
82
83 // pinch:
84 m.translate(effectCenter.x(), effectCenter.y());
85 m.scale(scale, scale);
86
87 // whirl:
88 m.rotate(whirlAngle *(1.0 - distToCenter) *(1.0 - distToCenter));
89 m.translate(-effectCenter.x(), -effectCenter.y());
90
91 // transform back to shape coordinates
92 return pathShape->documentToShape(m.map(docPoint));
93 }
94 return point;
95 }
96
97 KoPathShape * pathShape;
98 qreal whirlAngle;
99 qreal pinchAmount;
100 qreal effectRadius;
101 QPointF effectCenter;
102 QList< QList<PointData> > pathData;
103 };
104
KarbonWhirlPinchCommand(KoPathShape * path,qreal angle,qreal pinch,qreal radius,KUndo2Command * parent)105 KarbonWhirlPinchCommand::KarbonWhirlPinchCommand(KoPathShape * path, qreal angle, qreal pinch, qreal radius, KUndo2Command *parent)
106 : KUndo2Command(parent), d(new Private(path, angle, pinch, radius))
107 {
108 setText(kundo2_i18n("Whirl & pinch"));
109
110 // save the path point data used for undo
111 uint subpathCount = d->pathShape->subpathCount();
112 for (uint subpathIndex = 0; subpathIndex < subpathCount; ++subpathIndex) {
113 QList<PointData> subpathData;
114 int pointCount = d->pathShape->subpathPointCount(subpathIndex);
115 for (int pointIndex = 0; pointIndex < pointCount; ++pointIndex) {
116 KoPathPoint * p = d->pathShape->pointByIndex(KoPathPointIndex(subpathIndex, pointIndex));
117 subpathData.append(PointData(p));
118 }
119 d->pathData.append(subpathData);
120 }
121 }
122
~KarbonWhirlPinchCommand()123 KarbonWhirlPinchCommand::~KarbonWhirlPinchCommand()
124 {
125 delete d;
126 }
127
redo()128 void KarbonWhirlPinchCommand::redo()
129 {
130 d->pathShape->update();
131 uint subpathCount = d->pathData.count();
132 for (uint subpathIndex = 0; subpathIndex < subpathCount; ++subpathIndex) {
133 uint pointCount = d->pathData[subpathIndex].count();
134 for (uint pointIndex = 0; pointIndex < pointCount; ++pointIndex) {
135 KoPathPoint * p = d->pathShape->pointByIndex(KoPathPointIndex(subpathIndex, pointIndex));
136 p->setPoint(d->whirlPinch(p->point()));
137 if (p->activeControlPoint1())
138 p->setControlPoint1(d->whirlPinch(p->controlPoint1()));
139 if (p->activeControlPoint2())
140 p->setControlPoint2(d->whirlPinch(p->controlPoint2()));
141 }
142 }
143 d->pathShape->normalize();
144 d->pathShape->update();
145
146 KUndo2Command::redo();
147 }
148
undo()149 void KarbonWhirlPinchCommand::undo()
150 {
151 d->pathShape->update();
152 uint subpathCount = d->pathData.count();
153 for (uint subpathIndex = 0; subpathIndex < subpathCount; ++subpathIndex) {
154 uint pointCount = d->pathData[subpathIndex].count();
155 for (uint pointIndex = 0; pointIndex < pointCount; ++pointIndex) {
156 KoPathPoint * p = d->pathShape->pointByIndex(KoPathPointIndex(subpathIndex, pointIndex));
157 d->pathData[subpathIndex][pointIndex].restorePoint(p);
158 }
159 }
160 d->pathShape->normalize();
161 d->pathShape->update();
162
163 KUndo2Command::undo();
164 }
165