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An Inkscape effect for adding CAD style dimensions to selected objects
in a drawing.
It uses the selection's bounding box, so if the bounding box has empty
space in the x- or y-direction (such as with some stars) the results
will look strange. Strokes might also overlap the edge of the
bounding box.
The dimension arrows aren't measured: use the "Visualize Path/Measure
Path" effect to add measurements.
This code contains snippets from existing effects in the Inkscape
extensions library, and marker data from markers.svg.
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� Dimensionz!Add dimensions as a path modifierc C s8 |j dtddd� |j dtddd� |j ddd d
� d S ) Nz --xoffsetg Y@z(x offset of the vertical dimension arrow)�type�default�helpz --yoffsetz*y offset of the horizontal dimension arrowz--type� geometriczBounding box type)r r )� add_argument�float)�self�pars� r �+/usr/share/inkscape/extensions/dimension.py�
add_arguments+ s
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add_marker2 s
zDimension.add_markerc C sP t � }|j|d | jj }|j}||d | jj }|�dd|||f � |S )zCreate a horzontal liner � r z M %f %f H %f)r �left�options�xoffset�right�yoffsetr )r �y�xlat�bbox�line�x1�x2�y1r r r � horz_lineE s zDimension.horz_linec C sP t � }||d | jj }|j|d | jj }|j}|�dd|||f � |S )zCreate a vertical liner r" r z M %f %f V %f)r r$ r% �topr' �bottomr )r �xr) r* r+ r. �y2r r r � vert_lineN s zDimension.vert_linec C s2 | j �d�}| j j|9 _| j j|9 _| j js t�d��| jjdkr,| j j �
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d g|�}|�dd� |�dd� |�dt|�� |�|� | �|jdd g|�}|�dtd| �� |�|� | �|jdd g|�}|�dtd| �� |�|� | j j�� D ]}|�|� �q |�|� d S )N�1pxzPlease select an objectr � Arrow1LstartF�
Arrow1LendT�fill�none�stroke�blackr r" z marker-startzurl(#Arrow1Lstart)z
marker-endzurl(#Arrow1Lend)z stroke-width� g �?)r �unittouur$ r% r' �selected�inkex�AbortExtensionr � selection� bounding_box�first�get_current_layerr! r r r r/ r0 �strr4 r# r& r1 �values)r �scaler* �layer�groupr+ �noder r r �effectW sR
zDimension.effectN) �__name__�
__module__� __qualname__�__doc__r r! r/ r4 rK r r r r r ) s r �__main__)
rO r? r r r � pathmodifier� PathModifierr rL �runr r r r �<module> s g�