<b>Click on an image.</b>
(name: <span class="tt wims_code_words">coord</span>)
<br>
This reply type allows the user to click on an image, and can analyze the
position of the click according to various zoning criteria.
<p>
The correct reply must be given in the form of a matrix (row separator:
semi-colon `;'). The first row is the image URL. The image must be for the moment
in format gif.
The second row is the position of the criteria for the click coordinates
to be considered as correct. And starting from the eventual third row, each one
can contain some criteria (wrong positions).
All the point coordinates must be in pixels.
</p><p>
The user reply is considered as being correct when the conditions in the second
row are met. Otherwise, if criteria for wrong positions exist (third row and
up), the reply is wrong if one of the wrong conditions are met; or ambiguous if
no condition is met (in the latter case the user will be asked to retry).
If there is no wrong position, any answer not meeting the second row will be
judged as wrong.
</p><p>
The number of the first row met by the user reply minus one will be kept
in a variable <span class="tt wims_code_variable">\result</span><em>n</em>
where <em>n</em> is the number
of the input field, which can be used in a \feedback.
</p><p>
Several conditions can be combined in a same row, using connectors
`&' (intersection), `|' (union), `^' (complement), as well as parentheses.
</p><p>
It is recommended that this input field be embedded in the statement. It
cannot coexist with other input fields, for the obvious reason that any user
click on the image will send the form.
</p>
!set p=anstype/coord
!readproc tabletheme
$table_header
!set caption=!record 1 of help/$p
<caption>$caption</caption>
!set
header=!record
2 of help
/$p !set cnt_record=!recordcnt help/$p
!for u= 3 to $cnt_record
!set l_=!record $u of help/$p
$table_tr<td class="tt wims_code_words">
!line 1 of $l_
</td><td>
!line 2 to -1 of $l_
</td>
$table_end