On Sat, 30 Aug 2008 21:03:32 -0000
"russellgum" <[EMAIL PROTECTED]> wrote:
> I have an svg application where a click on a polygon changes its
> color and sets up an entry to a database. This works fine except when
> I want to change my mind and unselect the polygon and change its
> color back to the original.
>
> I tried to use a mouseup to select the polygon that needs to have its
> color reset. This sortof works but the click event also triggers the
> mouseup function so I get extraneous data in my database.
>
> I tried up using a mousedown event to select and a mouseup to
> unselect, but this is very dependent on the users moving the mouse
> into or out of the polygon. This does work, however.
>
> So, question 1 is: Is there a better way to select and then unselect
> a polygon?
My normal approach to this is to use CSS classes. When selecting, you
add a class of 'selected'. When unselecting, you remove that class.
This allows you to have a function which on mouseup checks the class to
see if it is selected and acts accordingly.
The selected class can easily support changed colors and other CSS
attributes in one move.
G. Wade
> Next
>
> I tried to determine the fill color of a polygon via javascript but
> had little success.
>
> function restoreColor(evt) {
>
> objet=evt.target;
> att=objet.attributes;
> var state = document.getElementById(att.item(0).value);
> var style = state.style;
>
> //var oldcolor = att.item(4).value); (this is the original
> polygon color) //alert(oldcolor); (this does not work)
>
> style.setProperty("fill","blue", ""); (for some reason -- ie
> my lack of expertise in javascript -- I could not replace "blue" with
> att.item(4).value) chaine = chaine+'field='+ att.item(0).value +"&";
> alert("chaine" + " " + chaine);
> }
>
> Question 2 is how can I define a variable that would allow me to
> replace "blue" in the example above with the original polygon fill
> which is att.item(4).value
>
--
Ever wonder why the SAME PEOPLE make up ALL the conspiracy theories?
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