/**
* Render the horizontal axis
*
* @param RenderContext $ctx The context to use for rendering
* @param DOMElement $group The DOMElement this axis will be added to
*/
private function renderHorizontalAxis(RenderContext $ctx, DOMElement $group)
{
$line = new Line(0, 100, 100, 100);
$line->setStrokeWidth(2);
$group->appendChild($line->toSvg($ctx));
// contains the approximate end position of the last label
$lastLabelEnd = -1;
$shift = 0;
foreach ($this->xUnit as $label => $pos) {
if ($this->labelRotationStyle === self::LABEL_ROTATE_HORIZONTAL) {
// If the last label would overlap this label we shift the y axis a bit
if ($lastLabelEnd > $pos) {
$shift = ($shift + 5) % 10;
} else {
$shift = 0;
}
}
$tick = new Line($pos, 100, $pos, 102);
$group->appendChild($tick->toSvg($ctx));
$labelField = new Text($pos + 0.5, ($this->xLabel ? 107 : 105) + $shift, $label);
if ($this->labelRotationStyle === self::LABEL_ROTATE_HORIZONTAL) {
$labelField->setAlignment(Text::ALIGN_MIDDLE)->setFontSize('1.8em');
} else {
$labelField->setFontSize('2.5em');
}
$labelField = $labelField->toSvg($ctx);
if ($this->labelRotationStyle === self::LABEL_ROTATE_DIAGONAL) {
$labelField = $this->rotate($ctx, $labelField, 45);
}
$group->appendChild($labelField);
if ($this->drawYGrid) {
$bgLine = new Line($pos, 0, $pos, 100);
$bgLine->setStrokeWidth(0.5)->setStrokeColor('#232');
$group->appendChild($bgLine->toSvg($ctx));
}
$lastLabelEnd = $pos + strlen($label) * 1.2;
}
// render the label for this axis
if ($this->xLabel) {
$axisLabel = new Text(50, 104, $this->xLabel);
$axisLabel->setFontSize('2em')->setFontWeight('bold')->setAlignment(Text::ALIGN_MIDDLE);
$group->appendChild($axisLabel->toSvg($ctx));
}
}
/**
* Draw the label handler and the text for this pie slice
*
* @param RenderContext $ctx The rendering context to use for coordinate translation
* @param int $r The radius of the pie in absolute coordinates
*
* @return DOMElement The group DOMElement containing the handle and label
*/
private function drawDescriptionLabel(RenderContext $ctx, $r)
{
$group = $ctx->getDocument()->createElement('g');
$rOuter = ($ctx->xToAbsolute($this->outerCaptionBound) + $ctx->yToAbsolute($this->outerCaptionBound)) / 2;
$addOffset = $rOuter - $r;
if ($addOffset < 0) {
$addOffset = 0;
}
list($x, $y) = $ctx->toAbsolute($this->x, $this->y);
$midRadius = $this->startRadian + ($this->endRadian - $this->startRadian) / 2;
list($offsetX, $offsetY) = $ctx->toAbsolute($this->captionOffset, $this->captionOffset);
$midX = $x + intval(($offsetX + $r) / 2 * sin($midRadius));
$midY = $y - intval(($offsetY + $r) / 2 * cos($midRadius));
// Draw the handle
$path = new Path(array($midX, $midY));
$midX += ($addOffset + $r / 1.8) * ($midRadius > M_PI ? -1 : 1);
$path->append(array($midX, $midY))->toAbsolute();
$midX += intval($r / 2 * sin(M_PI / 9)) * ($midRadius > M_PI ? -1 : 1);
$midY -= intval($r / 2 * cos(M_PI / 3)) * ($midRadius < M_PI * 1.4 && $midRadius > M_PI / 3 ? -1 : 1);
if ($ctx->ytoRelative($midY) > 100) {
$midY = $ctx->yToAbsolute(100);
} elseif ($ctx->ytoRelative($midY) < 0) {
$midY = $ctx->yToAbsolute($ctx->ytoRelative(100 + $midY));
}
$path->append(array($midX, $midY));
$rel = $ctx->toRelative($midX, $midY);
// Draw the text box
$text = new Text($rel[0] + 1.5, $rel[1], $this->caption);
$text->setFontSize('2.5em');
$text->setAlignment($midRadius > M_PI ? Text::ALIGN_END : Text::ALIGN_START);
$group->appendChild($path->toSvg($ctx));
$group->appendChild($text->toSvg($ctx));
return $group;
}
/**
* Render the horizontal axis
*
* @param RenderContext $ctx The context to use for rendering
* @param DOMElement $group The DOMElement this axis will be added to
*/
private function renderHorizontalAxis(RenderContext $ctx, DOMElement $group)
{
$steps = $this->ticksPerX($this->xUnit->getTicks(), $ctx->getNrOfUnitsX(), $this->minUnitsPerStep);
$ticks = $this->ticksPerX($this->xUnit->getTicks(), $ctx->getNrOfUnitsX(), $this->minUnitsPerTick);
// Steps should always be ticks
if ($ticks !== $steps) {
$steps = $ticks * 5;
}
// Check whether there is enough room for regular labels
$labelRotationStyle = $this->labelRotationStyle;
if ($this->labelsOversized($this->xUnit, 6)) {
$labelRotationStyle = self::LABEL_ROTATE_DIAGONAL;
}
/*
$line = new Line(0, 100, 100, 100);
$line->setStrokeWidth(2);
$group->appendChild($line->toSvg($ctx));
*/
// contains the approximate end position of the last label
$lastLabelEnd = -1;
$shift = 0;
$i = 0;
foreach ($this->xUnit as $label => $pos) {
if ($i % $ticks === 0) {
/*
$tick = new Line($pos, 100, $pos, 101);
$group->appendChild($tick->toSvg($ctx));
*/
}
if ($i % $steps === 0) {
if ($labelRotationStyle === self::LABEL_ROTATE_HORIZONTAL) {
// If the last label would overlap this label we shift the y axis a bit
if ($lastLabelEnd > $pos) {
$shift = ($shift + 5) % 10;
} else {
$shift = 0;
}
}
$labelField = new Text($pos + 0.5, ($this->xLabel ? 107 : 105) + $shift, $label);
if ($labelRotationStyle === self::LABEL_ROTATE_HORIZONTAL) {
$labelField->setAlignment(Text::ALIGN_MIDDLE)->setFontSize('2.5em');
} else {
$labelField->setFontSize('2.5em');
}
if ($labelRotationStyle === self::LABEL_ROTATE_DIAGONAL) {
$labelField = new Rotator($labelField, 45);
}
$labelField = $labelField->toSvg($ctx);
$group->appendChild($labelField);
if ($this->drawYGrid) {
$bgLine = new Line($pos, 0, $pos, 100);
$bgLine->setStrokeWidth(0.5)->setStrokeColor('#BFBFBF');
$group->appendChild($bgLine->toSvg($ctx));
}
$lastLabelEnd = $pos + strlen($label) * 1.2;
}
$i++;
}
}
