wish : simple expression evaluator for x,y,width,height and so on

[v1nce]

Hi,

For technical drawing it could be usefull if one could enter expression in input boxes such as x,y,width,height.

Eg :
My page is 512px wide. I want to make a centered rect that starts at 48px from the left.
So x is 48 and width is 416.
Instead of entering 416 I wish I could enter the expression 512 -48 * 2

--
Maybe this could be delegated to libxslt (if inkscape use it)

create the xsl and evaluate it
<xsl>
<variable pw="512" /> <!-- page width -->
<variable ph="1024" /> <!-- page height -->
<variable bbw="400" /> <!-- bounding box width of current item -->
<variable bbh="200" /> <!-- bb height -->
<variable bbx="20" /> <!-- bb x -->
<variable bby="100" /> <!-- bb y -->

<xsl:template match="/">
<xsl:value-of select=" 512 - 48 * 2 " /><!-- maybe we could evaluate more complex expressions such as math.cos()... -->
</xsl:template>

</xsl>

[su_v (suv-lp)]

Already implemented in trunk (for Inkscape 0.49):
<http://wiki.inkscape.org/wiki/index.php/Release_notes/0.49#Simple_calculations_in_spinboxes>

Linking as duplicate to
Bug #171282 (sf1488591) “Calculator in input fields”
<https://bugs.launchpad.net/inkscape/+bug/171282>

Please add a comment here and revert the duplicate status here if you don't agree and think these are different feature requests.