summaryrefslogtreecommitdiffstats
path: root/src/charts/line.php
blob: 9732205700dcd6d3148c1fcc8d3eb3ef02b1abe1 (plain)
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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
<?php
/**
 * File containing the abstract ezcGraphLineChart 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 line chart.
 *
 * @package Graph
 */
class ezcGraphLineChart extends ezcGraphChart
{
 
    /**
     * Constructor
     * 
     * @param array $options Default option array
     * @return void
     * @ignore
     */
    public function __construct( array $options = array() )
    {
        $this->options = new ezcGraphLineChartOptions( $options );
        $this->options->highlightFont = $this->options->font;

        parent::__construct();

        $this->addElement( 'xAxis', new ezcGraphChartElementLabeledAxis() );
        $this->elements['xAxis']->position = ezcGraph::LEFT;

        $this->addElement( 'yAxis', new ezcGraphChartElementNumericAxis() );
        $this->elements['yAxis']->position = ezcGraph::BOTTOM;
    }

    /**
     * Options write access
     * 
     * @throws ezcBasePropertyNotFoundException
     *          If Option could not be found
     * @throws ezcBaseValueException
     *          If value is out of range
     * @param mixed $propertyName   Option name
     * @param mixed $propertyValue  Option value;
     * @return mixed
     * @ignore
     */
    public function __set( $propertyName, $propertyValue ) 
    {
        switch ( $propertyName ) {
            case 'xAxis':
                if ( $propertyValue instanceof ezcGraphChartElementAxis )
                {
                    $this->addElement( 'xAxis', $propertyValue );
                    $this->elements['xAxis']->position = ezcGraph::LEFT;
                }
                else
                {
                    throw new ezcBaseValueException( $propertyName, $propertyValue, 'ezcGraphChartElementAxis' );
                }
                break;
            case 'yAxis':
                if ( $propertyValue instanceof ezcGraphChartElementAxis )
                {
                    $this->addElement( 'yAxis', $propertyValue );
                    $this->elements['yAxis']->position = ezcGraph::BOTTOM;
                }
                else
                {
                    throw new ezcBaseValueException( $propertyName, $propertyValue, 'ezcGraphChartElementAxis' );
                }
                break;
            default:
                parent::__set( $propertyName, $propertyValue );
        }
    }

    protected function renderData( $renderer, $boundings )
    {
        // Apply axis space
        $xAxisSpace = ( $boundings->x1 - $boundings->x0 ) * $this->yAxis->axisSpace;
        $yAxisSpace = ( $boundings->y1 - $boundings->y0 ) * $this->xAxis->axisSpace;

        $boundings->x0 += $xAxisSpace;
        $boundings->x1 -= $xAxisSpace;

        $boundings->y0 += $yAxisSpace;
        $boundings->y1 -= $yAxisSpace;

        $yAxisNullPosition = $this->elements['yAxis']->getCoordinate( false );

        // Initialize counters
        $nr = array();
        $count = array();

        foreach ( $this->data as $data )
        {
            if ( !isset( $nr[$data->displayType->default] ) )
            {
                $nr[$data->displayType->default] = 0;
                $count[$data->displayType->default] = 0;
            }

            $nr[$data->displayType->default]++;
            $count[$data->displayType->default]++;
        }

        // Display data
        foreach ( $this->data as $datasetName => $data )
        {
            --$nr[$data->displayType->default];
            switch ( $data->displayType->default )
            {
                case ezcGraph::LINE:
                    // Determine fill color for dataset
                    if ( $this->options->fillLines !== false )
                    {
                        $fillColor = clone $data->color->default;
                        $fillColor->alpha = (int) round( ( 255 - $fillColor->alpha ) * ( $this->options->fillLines / 255 ) );
                    }
                    else
                    {
                        $fillColor = null;
                    }

                    // Draw lines for dataset
                    $lastPoint = false;
                    foreach ( $data as $key => $value )
                    {
                        $point = $this->elements['xAxis']->axisLabelRenderer->modifyChartDataPosition( 
                            $this->elements['yAxis']->axisLabelRenderer->modifyChartDataPosition(
                                new ezcGraphCoordinate( 
                                    $this->elements['xAxis']->getCoordinate( $key ),
                                    $this->elements['yAxis']->getCoordinate( $value )
                                )
                            )
                        );

                        $renderer->drawDataLine(
                            $boundings,
                            new ezcGraphContext( $datasetName, $key ),
                            $data->color->default,
                            ( $lastPoint === false ? $point : $lastPoint ),
                            $point,
                            $nr[$data->displayType->default],
                            $count[$data->displayType->default],
                            $data->symbol[$key],
                            $data->color[$key],
                            $fillColor,
                            $yAxisNullPosition
                        );

                        if ( $data->highlight[$key] )
                        {
                            $renderer->drawDataHighlightText(
                                $boundings,
                                new ezcGraphContext( $datasetName, $key ),
                                $point,
                                $yAxisNullPosition,
                                $nr[$data->displayType->default],
                                $count[$data->displayType->default],
                                $this->options->highlightFont,
                                $value,
                                $this->options->highlightSize,
                                ( $this->options->highlightLines ? $data->color[$key] : null )
                            );
                        }
    
                        $lastPoint = $point;
                    }
                    break;
                case ezcGraph::BAR:
                    $width = $this->elements['xAxis']->axisLabelRenderer->modifyChartDataPosition( 
                        $this->elements['yAxis']->axisLabelRenderer->modifyChartDataPosition(
                            new ezcGraphCoordinate(
                                ( $boundings->x1 - $boundings->x0 ) / $this->elements['xAxis']->getMajorStepCount(), 
                                0 
                            )
                        )
                    )->x;

                    foreach ( $data as $key => $value )
                    {
                        $point = new ezcGraphCoordinate( 
                            $this->elements['xAxis']->getCoordinate( $key ),
                            $this->elements['yAxis']->getCoordinate( $value )
                        );

                        $renderer->drawBar(
                            $boundings,
                            new ezcGraphContext( $datasetName, $key ),
                            $data->color->default,
                            $point = $this->elements['xAxis']->axisLabelRenderer->modifyChartDataPosition( 
                                $this->elements['yAxis']->axisLabelRenderer->modifyChartDataPosition(
                                    $point
                                )
                            ),
                            $width,
                            $nr[$data->displayType->default],
                            $count[$data->displayType->default],
                            $data->symbol[$key],
                            $yAxisNullPosition
                        );

                        if ( $data->highlight[$key] )
                        {
                            $renderer->drawDataHighlightText(
                                $boundings,
                                new ezcGraphContext( $datasetName, $key ),
                                $point,
                                $yAxisNullPosition,
                                $nr[$data->displayType->default],
                                $count[$data->displayType->default],
                                $this->options->highlightFont,
                                $value,
                                $this->options->highlightSize,
                                ( $this->options->highlightLines ? $data->color[$key] : null )
                            );
                        }
                    }
                    break;
                default:
                    throw new ezcGraphInvalidDisplayTypeException( $data->displayType->default );
                    break;
            }
        }
    }

    /**
     * Returns the default display type of the current chart type.
     * 
     * @return int Display type
     */
    public function getDefaultDisplayType()
    {
        return ezcGraph::LINE;
    }

    /**
     * Render a line 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;

        // Calculate axis scaling and labeling
        foreach ( $this->data as $dataset )
        {
            $labels = array();
            $values = array();
            foreach ( $dataset as $label => $value )
            {
                $labels[] = $label;
                $values[] = $value;
            }

            $this->elements['xAxis']->addData( $labels );
            $this->elements['yAxis']->addData( $values );
        }

        $this->elements['xAxis']->calculateAxisBoundings();
        $this->elements['yAxis']->calculateAxisBoundings();

        // Generate legend
        $this->elements['legend']->generateFromDataSets( $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;

        $boundings = $this->elements['xAxis']->axisLabelRenderer->modifyChartBoundings( 
            $this->elements['yAxis']->axisLabelRenderer->modifyChartBoundings(
                $boundings, new ezcGraphCoordinate( 1, 0 )
            ), new ezcGraphCoordinate( -1, 0 )
        );

        // Render subelements
        foreach ( $this->elements as $name => $element )
        {
            // Skip element, if it should not get rendered
            if ( $this->renderElement[$name] === false )
            {
                continue;
            }

            // Special settings for special elements
            switch ( $name )
            {
                case 'xAxis':
                    // get Position of 0 on the Y-axis for orientation of the x-axis
                    $element->nullPosition = $this->elements['yAxis']->getCoordinate( false );
                    break;
                case 'yAxis':
                    // get Position of 0 on the X-axis for orientation of the y-axis
                    $element->nullPosition = $this->elements['xAxis']->getCoordinate( false );
                    break;
            }

            $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 );
        }
    }
}
?>
OpenPOWER on IntegriCloud