get width and height from legend

[flip111]

Could the code calculating the legend width and height

jpgraph/src/graph/Legend.php

Lines 275 to 302 in 1328d5a

	$abs_height = 0;
	for ($i = 0; $i < $rows; ++$i) {
	$abs_height += $rowheight[$i];
	}
	// Make sure that the height is at least as high as mark size + ymargin
	$abs_height = max($abs_height, $this->mark_abs_vsize);
	$abs_height += $this->ybottom_margin;
	// Find out the maximum width in each column
	for ($i = $numcolumns; $i < $n; ++$i) {
	$colwidth[$i % $numcolumns] = max(
	$aImg->GetTextWidth($this->txtcol[$i][0]) + 2 * $this->xmargin + 2 * $this->mark_abs_hsize,
	$colwidth[$i % $numcolumns]
	);
	}
	// Get the total width
	$mtw = 0;
	for ($i = 0; $i < $numcolumns; ++$i) {
	$mtw += $colwidth[$i];
	}
	// remove the last rows interpace margin (since there is no next row)
	$abs_height -= $this->ylinespacing;
	// Find out maximum width we need for legend box
	$abs_width = $mtw + $this->xlmargin + ($numcolumns - 1) * $this->mark_abs_hsize;

be refactored into it's own function?

That way we can get the width and height with getter functions. Use case is then you know exactly how big to set the plot margins to reserve sufficient space for the legend.