/**
* Render the assigned data
*
* Will renderer all charts data in the remaining boundings after drawing
* all other chart elements. The data will be rendered depending on the
* settings in the dataset.
*
* @param ezcGraphRenderer $renderer Renderer
* @param ezcGraphBoundings $boundings Remaining boundings
* @return void
*/
protected function renderData(ezcGraphRenderer $renderer, ezcGraphBoundings $boundings, ezcGraphBoundings $innerBoundings)
{
// Use inner boundings for drawning chart data
$boundings = $innerBoundings;
$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]++;
}
$checkedRegularSteps = false;
// Display data
foreach ($this->data as $datasetName => $data) {
--$nr[$data->displayType->default];
// Check which axis should be used
$xAxis = $data->xAxis->default ? $data->xAxis->default : $this->elements['xAxis'];
$yAxis = $data->yAxis->default ? $data->yAxis->default : $this->elements['yAxis'];
// Determine fill color for dataset
if ($this->options->fillLines !== false) {
$fillColor = clone $data->color->default;
$fillColor->alpha = (int) round((255 - $fillColor->alpha) * ($this->options->fillLines / 255));
} else {
$fillColor = null;
}
// Ensure regular steps on axis when used with bar charts and
// precalculate some values use to render bar charts
//
// Called only once and only when bars should be rendered
if ($checkedRegularSteps === false && $data->displayType->default === ezcGraph::BAR) {
$steps = $xAxis->getSteps();
$stepWidth = null;
foreach ($steps as $step) {
if ($stepWidth === null) {
$stepWidth = $step->width;
} elseif ($step->width !== $stepWidth) {
throw new ezcGraphUnregularStepsException();
}
}
$step = reset($steps);
if (count($step->childs)) {
// Keep this for BC reasons
$barCount = ($xAxis->getMajorStepCount() + 1) * ($xAxis->getMinorStepCount() - 1);
$stepWidth = 1 / $barCount;
}
$checkedRegularSteps = true;
$width = $xAxis->axisLabelRenderer->modifyChartDataPosition($yAxis->axisLabelRenderer->modifyChartDataPosition(new ezcGraphCoordinate(($boundings->x1 - $boundings->x0) * $stepWidth, 0)))->x;
}
// Draw lines for dataset
$lastPoint = false;
foreach ($data as $key => $value) {
// Calculate point in chart
$point = $xAxis->axisLabelRenderer->modifyChartDataPosition($yAxis->axisLabelRenderer->modifyChartDataPosition(new ezcGraphCoordinate($xAxis->getCoordinate($key), $yAxis->getCoordinate($value))));
// Render depending on display type of dataset
switch (true) {
case $data->displayType->default === ezcGraph::LINE:
$renderer->drawDataLine($boundings, new ezcGraphContext($datasetName, $key, $data->url[$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, $data->lineThickness->default ? $data->lineThickness->default : $this->options->lineThickness);
break;
case $data->displayType->default === ezcGraph::BAR && $this->options->stackBars:
// Check if a bar has already been stacked
if (!isset($stackedValue[(int) ($point->x * 10000)][(int) $value > 0])) {
$start = new ezcGraphCoordinate($point->x, $yAxisNullPosition);
$stackedValue[(int) ($point->x * 10000)][(int) $value > 0] = $value;
} else {
$start = $xAxis->axisLabelRenderer->modifyChartDataPosition($yAxis->axisLabelRenderer->modifyChartDataPosition(new ezcGraphCoordinate($xAxis->getCoordinate($key), $yAxis->getCoordinate($stackedValue[(int) ($point->x * 10000)][(int) $value > 0]))));
$point = $xAxis->axisLabelRenderer->modifyChartDataPosition($yAxis->axisLabelRenderer->modifyChartDataPosition(new ezcGraphCoordinate($xAxis->getCoordinate($key), $yAxis->getCoordinate($stackedValue[(int) ($point->x * 10000)][(int) $value > 0] += $value))));
}
// Force one symbol for each stacked bar
if (!isset($stackedSymbol[(int) ($point->x * 10000)])) {
$stackedSymbol[(int) ($point->x * 10000)] = $data->symbol[$key];
}
// Store stacked value for next iteration
$side = $point->y == 0 ? 1 : $point->y / abs($point->y);
$stacked[(int) ($point->x * 10000)][$side] = $point;
$renderer->drawStackedBar($boundings, new ezcGraphContext($datasetName, $key, $data->url[$key]), $data->color->default, $start, $point, $width, $stackedSymbol[(int) ($point->x * 10000)], $yAxisNullPosition);
break;
case $data->displayType->default === ezcGraph::BAR:
$renderer->drawBar($boundings, new ezcGraphContext($datasetName, $key, $data->url[$key]), $data->color[$key], $point, $width, $nr[$data->displayType->default], $count[$data->displayType->default], $data->symbol[$key], $yAxisNullPosition);
break;
default:
throw new ezcGraphInvalidDisplayTypeException($data->displayType->default);
break;
}
// Render highlight string if requested
if ($data->highlight[$key]) {
$renderer->drawDataHighlightText($boundings, new ezcGraphContext($datasetName, $key, $data->url[$key]), $point, $yAxisNullPosition, $nr[$data->displayType->default], $count[$data->displayType->default], $this->options->highlightFont, $data->highlightValue[$key] ? $data->highlightValue[$key] : $value, $this->options->highlightSize + $this->options->highlightFont->padding * 2, $this->options->highlightLines ? $data->color[$key] : null, $this->options->highlightXOffset ? $this->options->highlightXOffset : 0, $this->options->highlightYOffset ? $this->options->highlightYOffset : 0);
}
// Store last point, used to connect lines in line chart.
$lastPoint = $point;
}
}
}
