public function AutoScale($img, $min, $max, $maxsteps, $majend = true)
{
if (!is_numeric($min) || !is_numeric($max)) {
Util\JpGraphError::Raise(25044);
}
if ($this->intscale) {
$this->IntAutoScale($img, $min, $max, $maxsteps, $majend);
return;
}
if (abs($min - $max) < 1.0E-5) {
// We need some difference to be able to autoscale
// make it 5% above and 5% below value
if ($min == 0 && $max == 0) {
// Special case
$min = -1;
$max = 1;
} else {
$delta = (abs($max) + abs($min)) * 0.005;
$min -= $delta;
$max += $delta;
}
}
$gracetop = $this->gracetop / 100.0 * abs($max - $min);
$gracebottom = $this->gracebottom / 100.0 * abs($max - $min);
if (is_numeric($this->autoscale_min)) {
$min = $this->autoscale_min;
if ($min >= $max) {
Util\JpGraphError::RaiseL(25071);
//('You have specified a min value with SetAutoMin() which is larger than the maximum value used for the scale. This is not possible.');
}
if (abs($min - $max) < 0.001) {
$max *= 1.2;
}
}
if (is_numeric($this->autoscale_max)) {
$max = $this->autoscale_max;
if ($min >= $max) {
Util\JpGraphError::RaiseL(25072);
//('You have specified a max value with SetAutoMax() which is smaller than the miminum value used for the scale. This is not possible.');
}
if (abs($min - $max) < 0.001) {
$min *= 0.8;
}
}
$min -= $gracebottom;
$max += $gracetop;
// First get tickmarks as multiples of 0.1, 1, 10, ...
if ($majend) {
list($num1steps, $adj1min, $adj1max, $min1step, $maj1step) = $this->CalcTicks($maxsteps, $min, $max, 1, 2);
} else {
$adj1min = $min;
$adj1max = $max;
list($num1steps, $min1step, $maj1step) = $this->CalcTicksFreeze($maxsteps, $min, $max, 1, 2, false);
}
// Then get tick marks as 2:s 0.2, 2, 20, ...
if ($majend) {
list($num2steps, $adj2min, $adj2max, $min2step, $maj2step) = $this->CalcTicks($maxsteps, $min, $max, 5, 2);
} else {
$adj2min = $min;
$adj2max = $max;
list($num2steps, $min2step, $maj2step) = $this->CalcTicksFreeze($maxsteps, $min, $max, 5, 2, false);
}
// Then get tickmarks as 5:s 0.05, 0.5, 5, 50, ...
if ($majend) {
list($num5steps, $adj5min, $adj5max, $min5step, $maj5step) = $this->CalcTicks($maxsteps, $min, $max, 2, 5);
} else {
$adj5min = $min;
$adj5max = $max;
list($num5steps, $min5step, $maj5step) = $this->CalcTicksFreeze($maxsteps, $min, $max, 2, 5, false);
}
// Check to see whichof 1:s, 2:s or 5:s fit better with
// the requested number of major ticks
$match1 = abs($num1steps - $maxsteps);
$match2 = abs($num2steps - $maxsteps);
$match5 = abs($num5steps - $maxsteps);
// Compare these three values and see which is the closest match
// We use a 0.8 weight to gravitate towards multiple of 5:s
$r = $this->MatchMin3($match1, $match2, $match5, 0.8);
switch ($r) {
case 1:
$this->Update($img, $adj1min, $adj1max);
$this->ticks->Set($maj1step, $min1step);
break;
case 2:
$this->Update($img, $adj2min, $adj2max);
$this->ticks->Set($maj2step, $min2step);
break;
case 3:
$this->Update($img, $adj5min, $adj5max);
$this->ticks->Set($maj5step, $min5step);
break;
}
}
