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
216
217
218
219
220
221
222
223
224
225
226
227
228
|
<?php
/**
* File containing the abstract ezcGraphPieChart class
*
* @package Graph
* @version //autogentag//
* @copyright Copyright (C) 2005, 2006 eZ systems as. All rights reserved.
* @license http://ez.no/licenses/new_bsd New BSD License
*/
/**
* Class to represent a pie chart.
*
* @package Graph
*/
class ezcGraphPieChart extends ezcGraphChart
{
public function __construct( array $options = array() )
{
$this->options = new ezcGraphPieChartOptions( $options );
parent::__construct( $options );
}
/**
* Adds a dataset to the charts data
*
* @param string $name Name of dataset
* @param mixed $values Values to create dataset with
* @throws ezcGraphTooManyDatasetExceptions
* If too many datasets are created
* @return ezcGraphDataset
*/
protected function addDataSet( $name, $values )
{
if ( count( $this->data ) >= 1 &&
!isset( $this->data[$name] ) )
{
throw new ezcGraphTooManyDatasetsExceptions( $name );
}
else
{
parent::addDataSet( $name, $values );
// Colorize each data element
foreach ( $this->data[$name] as $label => $value )
{
$this->data[$name]->color[$label] = $this->palette->dataSetColor;
}
}
}
protected function renderData( $renderer, $boundings )
{
// Only draw the first (and only) dataset
$dataset = reset( $this->data );
$this->driver->options->font = $this->options->font;
// Calculate sum of all values to be able to calculate percentage
$sum = 0;
foreach ( $dataset as $value )
{
$sum += $value;
}
// Calculate position and size of pie
$center = new ezcGraphCoordinate(
(int) round( $boundings->x0 + ( $boundings->x1 - $boundings->x0 ) / 2 ),
(int) round( $boundings->y0 + ( $boundings->y1 - $boundings->y0 ) / 2 )
);
$radius = min(
$boundings->x1 - $boundings->x0,
$boundings->y1 - $boundings->y0
) / 2;
// Draw all data
$angle = 0.;
$labels = array();
foreach ( $dataset as $label => $value )
{
$renderer->drawPieSegment(
$dataset->color[$label],
$center,
$radius * ( 1 - $this->options->moveOut ),
$angle,
$endAngle = $angle + $value / $sum * 360,
( $dataset->highlight[$label] ? $radius * $this->options->moveOut : 0 )
);
// Determine position of label
$middle = $angle + ( $endAngle - $angle ) / 2;
$pieSegmentCenter = new ezcGraphCoordinate(
(int) round( cos( deg2rad( $middle ) ) * $radius + $center->x ),
(int) round( sin( deg2rad( $middle ) ) * $radius + $center->y )
);
// Split labels up into left an right size and index them on their
// y position
$labels[(int) ($pieSegmentCenter->x > $center->x)][$pieSegmentCenter->y] = array(
new ezcGraphCoordinate(
(int) round( cos( deg2rad( $middle ) ) * $radius * 2 / 3 + $center->x ),
(int) round( sin( deg2rad( $middle ) ) * $radius * 2 / 3 + $center->y )
),
sprintf( $this->options->label, $label, $value, $value * 100 / $sum )
);
$angle = $endAngle;
}
$labelHeight = (int) round( min(
( $boundings->y1 - $boundings->y0 ) / count( $labels[0] ),
( $boundings->y1 - $boundings->y0 ) / count( $labels[1] ),
( $boundings->y1 - $boundings->y0 ) * $this->options->maxLabelHeight
) );
$symbolSize = $this->options->symbolSize;
// Finally draw labels
foreach ( $labels as $side => $labelPart )
{
$minHeight = $boundings->y0;
$toShare = ( $boundings->y1 - $boundings->y0 ) - count( $labelPart ) * $labelHeight;
// Sort to draw topmost label first
ksort( $labelPart );
$sign = ( $side ? -1 : 1 );
foreach ( $labelPart as $height => $label )
{
// Determine position of label
$minHeight += round( max( 0, $height - $minHeight ) / ( $boundings->y1 - $boundings->y0 ) * $toShare );
$labelPosition = new ezcGraphCoordinate(
(int) round( $center->x - $sign * ( cos ( asin ( ( $center->y - $minHeight - $labelHeight / 2 ) / $radius ) ) * $radius + $symbolSize ) ),
(int) round( $minHeight + $labelHeight / 2 )
);
// Draw label
$renderer->drawLine(
$this->options->font->color,
$label[0],
$labelPosition,
false
);
$renderer->drawSymbol(
$this->options->font->color,
new ezcGraphCoordinate(
$label[0]->x - $symbolSize / 2,
$label[0]->y - $symbolSize / 2
),
$symbolSize,
$symbolSize,
ezcGraph::BULLET
);
$renderer->drawSymbol(
$this->options->font->color,
new ezcGraphCoordinate(
$labelPosition->x - $symbolSize / 2,
$labelPosition->y - $symbolSize / 2
),
$symbolSize,
$symbolSize,
ezcGraph::BULLET
);
$renderer->drawTextBox(
new ezcGraphCoordinate(
( !$side ? $boundings->x0 : $labelPosition->x + $symbolSize ),
$minHeight
),
$label[1],
(int) round( !$side ? $labelPosition->x - $boundings->x0 - $symbolSize : $boundings->x1 - $labelPosition->x - $symbolSize ),
$labelHeight,
( !$side ? ezcGraph::RIGHT : ezcGraph::LEFT ) | ezcGraph::MIDDLE
);
// Add used space to minHeight
$minHeight += $labelHeight;
}
}
}
/**
* Render a pie chart
*
* @param ezcGraphRenderer $renderer
* @access public
* @return void
*/
public function render( $width, $height, $file = null )
{
// Set image properties in driver
$this->driver->options->width = $width;
$this->driver->options->height = $height;
// Generate legend
$this->elements['legend']->generateFromDataset( reset( $this->data ) );
// Get boundings from parameters
$this->options->width = $width;
$this->options->height = $height;
// Render subelements
$boundings = new ezcGraphBoundings();
$boundings->x1 = $this->options->width;
$boundings->y1 = $this->options->height;
// Render border and background
$boundings = $this->renderBorder( $boundings );
$boundings = $this->renderBackground( $boundings );
foreach ( $this->elements as $name => $element )
{
$this->driver->options->font = $element->font;
$boundings = $element->render( $this->renderer, $boundings );
}
// Render graph
$this->renderData( $this->renderer, $boundings );
if ( !empty( $file ) )
{
$this->renderer->render( $file );
}
}
}
?>
|
