1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/***************************************************************************
* *
* This file is part of the Wordcloud project, *
* http://www.enricoros.com/opensource/wordcloud *
* *
* Copyright (C) 2009 by Enrico Ros <enrico.ros@gmail.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 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "WordItem.h"
#include <QApplication>
#include <QPainterPathStroker>
#include <QPainter>
#include <QPen>
#include <QStyle>
#include <QStyleOptionFocusRect>
#include <QStyleOptionGraphicsItem>
using namespace Wordcloud;
WordItem::WordItem(const Word & word, const QFont & font, double rotation,
int minCount, int maxCount, QGraphicsItem * parent)
: QAbstractGraphicsShapeItem(parent)
, m_font(font)
, m_rotation(rotation)
, m_string(word.commonString)
{
// customize item
setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsFocusable | QGraphicsItem::ItemIsSelectable);
#if QT_VERSION >= 0x040600
setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
#endif
setPen(Qt::NoPen);
// adapt font to the relative count
const double maxFontSize = 96;
double gamma = (double)(word.count - minCount) / (double)(maxCount - minCount);
int fontSize = 8 + (int)(maxFontSize * gamma);
m_font.setPointSize(fontSize);
regeneratePath();
}
WordItem::WordItem(QDomElement & wordElement, QGraphicsItem * parent)
: QAbstractGraphicsShapeItem(parent)
, m_rotation((qreal)0.0)
{
// customize item
setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsFocusable | QGraphicsItem::ItemIsSelectable);
#if QT_VERSION >= 0x040600
setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
#endif
setPen(Qt::NoPen);
// restore geometry
QDomElement domElement;
domElement = wordElement.firstChildElement("pos");
qreal px = domElement.firstChildElement("x").text().toDouble();
qreal py = domElement.firstChildElement("y").text().toDouble();
setPos(px, py);
// restore font
domElement = wordElement.firstChildElement("font");
QString family = domElement.firstChildElement("family").text();
if (!family.isEmpty())
m_font.setFamily(family);
int pointSize = domElement.firstChildElement("pointSize").text().toInt();
if (pointSize > 0)
m_font.setPointSize(pointSize);
// SIMPLE restore brush
domElement = wordElement.firstChildElement("color");
QColor col(domElement.text());
setBrush(col.isValid() ? col : Qt::black);
// rotation
m_rotation = wordElement.firstChildElement("rotation").text().toDouble();
// word
m_string = wordElement.firstChildElement("string").text();
// DO PATH!
regeneratePath();
}
void WordItem::saveToXml(QDomElement & wordElement) const
{
QDomDocument doc = wordElement.ownerDocument();
QDomElement domElement;
// save geometry
domElement = doc.createElement("pos");
QDomElement xElement = doc.createElement("x");
QDomElement yElement = doc.createElement("y");
xElement.appendChild(doc.createTextNode(QString::number(pos().x())));
yElement.appendChild(doc.createTextNode(QString::number(pos().y())));
domElement.appendChild(xElement);
domElement.appendChild(yElement);
wordElement.appendChild(domElement);
// save font
domElement = doc.createElement("font");
QDomElement fElement = doc.createElement("family");
QDomElement psElement = doc.createElement("pointSize");
fElement.appendChild(doc.createTextNode(m_font.family()));
psElement.appendChild(doc.createTextNode(QString::number(m_font.pointSize())));
domElement.appendChild(fElement);
domElement.appendChild(psElement);
wordElement.appendChild(domElement);
// SIMPLE save brush
if (!brush().color().isValid())
qWarning("WordItem::saveToXml: implement complex brush xml dump");
domElement = doc.createElement("color");
domElement.appendChild(doc.createTextNode(brush().color().name()));
wordElement.appendChild(domElement);
// rotation
if (m_rotation != 0.0) {
domElement = doc.createElement("rotation");
domElement.appendChild(doc.createTextNode(QString::number(m_rotation)));
wordElement.appendChild(domElement);
}
// word
domElement = doc.createElement("string");
domElement.appendChild(doc.createTextNode(m_string));
wordElement.appendChild(domElement);
}
QVariant WordItem::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == ItemPositionHasChanged)
emit moved();
return QAbstractGraphicsShapeItem::itemChange(change, value);
}
void WordItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
// draw the word
painter->save();
painter->setPen(pen());
painter->setBrush(brush());
painter->drawPath(m_path);
// draw the standard selection
if (option->state & QStyle::State_Selected) {
QStyleOptionFocusRect opt;
opt.rect = boundingRect().toRect();
opt.backgroundColor = Qt::white;
QApplication::style()->drawPrimitive(QStyle::PE_FrameFocusRect, &opt, painter, 0);
}
painter->restore();
}
QPainterPath WordItem::strokedPath() const
{
// use path as-is if no pen or null
const QPen & pen = this->pen();
if (m_path == QPainterPath() || pen.widthF() <= 0.0)
return m_path;
// return enlarged (stroked) path
QPainterPathStroker ps;
ps.setCapStyle(pen.capStyle());
ps.setWidth(pen.widthF());
ps.setJoinStyle(pen.joinStyle());
ps.setMiterLimit(pen.miterLimit());
QPainterPath fullPath = ps.createStroke(m_path);
fullPath.addPath(m_path);
return fullPath;
}
void WordItem::regeneratePath()
{
// make the path from the text
QPainterPath path;
path.addText(0, 0, m_font, m_string);
// rotate the text if needed
if (m_rotation != 0.0) {
QTransform pathForm;
// perspective rotation
//pathForm.rotate(-60 + (qrand() % 120), Qt::XAxis);
//pathForm.rotate(-60 + (qrand() % 120), Qt::YAxis);
// planar rotation
pathForm.rotate(m_rotation, Qt::ZAxis);
path = pathForm.map(path);
}
// center the path
QPointF pathCenter = path.boundingRect().center();
#if QT_VERSION >= 0x040600
path.translate(-pathCenter);
#elif QT_VERSION >= 0x040500
path = QTransform::fromTranslate(-pathCenter.x(), -pathCenter.y()).map(path);
#else
path = QTransform().translate(-pathCenter.x(), -pathCenter.y()).map(path);
#endif
// update constants
prepareGeometryChange();
m_path = path;
if (pen().widthF() <= 0.001)
m_boudingRect = m_path.boundingRect();
else
m_boudingRect = strokedPath().boundingRect();
update();
}
|
