/**
* Returns the positions of the Y-axis text
*/
protected function YAxisTextPositions(&$points, $xoff, $yoff, $angle, $inside, $axis_no)
{
$positions = array();
$labels = '';
$font_size = $this->GetFirst($this->ArrayOption($this->axis_font_size_v, $axis_no), $this->axis_font_size);
$font_adjust = $this->GetFirst($this->ArrayOption($this->axis_font_adjust_v, $axis_no), $this->axis_font_adjust);
$text_space = $this->GetFirst($this->ArrayOption($this->axis_text_space_v, $axis_no), $this->axis_text_space);
$c = cos($this->arad);
$s = sin($this->arad);
$a = $this->arad + ($s * $c > 0 ? -M_PI_2 : M_PI_2);
$x2 = ($xoff + $text_space) * sin($a);
$y2 = ($xoff + $text_space) * cos($a);
$x3 = 0;
$y3 = $c > 0 ? $font_size : 0;
$position = array('text-anchor' => $s < 0 ? 'start' : 'end');
foreach ($points as $grid_point) {
$key = $grid_point->text;
$y = $grid_point->position;
if (SVGGraphStrlen($key, $this->encoding) > 0) {
$x1 = $y * $s;
$y1 = $y * $c;
$position['x'] = $this->xc + $x1 + $x2 + $x3;
$position['y'] = $this->yc + $y1 + $y2 + $y3;
if ($angle != 0) {
$rcx = $position['x'];
$rcy = $position['y'];
$position['transform'] = "rotate({$angle},{$rcx},{$rcy})";
}
$size = $this->TextSize((string) $key, $font_size, $font_adjust, $this->encoding, $angle, $font_size);
$position['text'] = $key;
$position['w'] = $size[0];
$position['h'] = $size[1];
$positions[] = $position;
}
}
return $positions;
}
/**
* Returns [width,height] of text
* $text = string OR text length
*/
public static function TextSize($text, $font_size, $font_adjust, $encoding, $angle = 0, $line_spacing = 0)
{
$height = $font_size;
if (is_int($text)) {
$len = $text;
} else {
// replace all entities with an underscore
$text = preg_replace('/&[^;]+;/', '_', $text);
if ($line_spacing > 0) {
$len = 0;
$lines = explode("\n", $text);
foreach ($lines as $l) {
if (SVGGraphStrlen($l, $encoding) > $len) {
$len = SVGGraphStrlen($l, $encoding);
}
}
$height += $line_spacing * (count($lines) - 1);
} else {
$len = SVGGraphStrlen($text, $encoding);
}
}
$width = $len * $font_size * $font_adjust;
if ($angle % 180 != 0) {
if ($angle % 90 == 0) {
$w = $height;
$height = $width;
$width = $w;
} else {
$a = deg2rad($angle);
$sa = abs(sin($a));
$ca = abs(cos($a));
$w = $ca * $width + $sa * $height;
$h = $sa * $width + $ca * $height;
$width = $w;
$height = $h;
}
}
return array($width, $height);
}
/**
* Strips units from before and after label
*/
protected function StripLabel($label)
{
$before = $this->before_label;
$after = $this->after_label;
$enc = $this->encoding;
$llen = SVGGraphStrlen($label, $enc);
$blen = SVGGraphStrlen($before, $enc);
$alen = SVGGraphStrlen($after, $enc);
if ($alen > 0 && SVGGraphSubstr($label, $llen - $alen, $alen, $enc) == $after) {
$label = SVGGraphSubstr($label, 0, $llen - $alen, $enc);
}
if ($blen > 0 && SVGGraphSubstr($label, 0, $blen, $enc) == $before) {
$label = SVGGraphSubstr($label, $blen, NULL, $enc);
}
return $label;
}
/**
* Returns the Y-axis text positions
*/
protected function YAxisTextPositions(&$points, $xoff, $yoff, $angle, $inside, $axis_no)
{
$y_prev = $this->height;
$min_space = $this->GetFirst($this->ArrayOption($this->minimum_grid_spacing_v, $axis_no), $this->minimum_grid_spacing);
$font_size = $this->GetFirst($this->ArrayOption($this->axis_font_size_v, $axis_no), $this->axis_font_size);
$font_adjust = $this->GetFirst($this->ArrayOption($this->axis_font_adjust_v, $axis_no), $this->axis_font_adjust);
$text_space = $this->GetFirst($this->ArrayOption($this->axis_text_space_v, $axis_no), $this->axis_text_space);
$text_centre = $font_size * 0.3;
$label_centre_y = $this->label_centre && $this->flip_axes;
$x_rotate_offset = $inside ? $text_centre : -$text_centre;
$y_rotate_offset = -$text_centre;
$x = $xoff + $text_space;
if (!$inside) {
$x = -$x;
}
$position = array('x' => $x);
$position['text-anchor'] = $inside ? 'start' : 'end';
$positions = array();
$count = count($points);
$p = 0;
foreach ($points as $grid_point) {
$key = $grid_point->text;
$y = $grid_point->position;
if ($this->flip_axes) {
// if the key is different to value, use it
$k = $this->GetKey($grid_point->value);
if ($k !== $grid_point->value) {
$key = $k;
}
}
// don't draw 0 over the axis line
if ($inside && !$label_centre_y && !$axis_no && $key == '0') {
$key = '';
}
if (SVGGraphStrlen($key, $this->encoding) && $y_prev - $y >= $min_space && (++$p < $count || !$label_centre_y)) {
$position['y'] = $y + $text_centre + $yoff;
if ($angle != 0) {
$rcx = $position['x'] + $x_rotate_offset;
$rcy = $position['y'] + $y_rotate_offset;
$position['transform'] = compact('angle', 'rcx', 'rcy');
}
$size = $this->TextSize((string) $key, $font_size, $font_adjust, $this->encoding, $angle, $font_size);
$position['text'] = $key;
$position['w'] = $size[0];
$position['h'] = $size[1];
$positions[] = $position;
}
$y_prev = $y;
}
return $positions;
}
