cascading_vertical_menu.class
Scott Mattocks
mttcks@hotmail.com
This class will create a vertical cascading menu in HTML. The
class also generates the needed javascript code for image rollovers
and hiding of the sub-menus. The main menu is positioned statically
while the sub-menus are all positioned absolutely.
A cascading menu consists of the main menu and several choices.
Each choice may have sub-choices which will appear to the right
of the parent-choice. A menu may have as many choices as desired.
The width of each choice (and sub-choice) will be the width of the
menu Each choice (and sub-choice) can have as many children as
desired. The main menu and each choice object can be given its own
css class to control the style and appearence.
How to use cascading_vertical_menu.class:
1 Create a cascading_vertical_menu object...
You need: the top and left coordinates (main menu is static)
the height you want the menu to be
the total width menu
the name of the css class for the main menu
$menu = new cascading_verticle_menu($top, $left, $height, $width, $css);
2 Create some top level choices
These are the choices that will always be visible
You need: the inactive (up) image
the active (down) image
the URL to link to
the alternate text for the image
the css class for the choice
$choice_N = new choice($up, $down, $url, $alt, $css);
3 Create some sub-level choices
These choices will only appear when the mouse is over
their respective parent
You need: same as #2
$sub_N = new choice($up, $down, $url, $alt, $css);
4 Add the choices to the menu and to parent choices
You must add choices from the parent down!
You can create as many levels as you like.
Good:
$menu->add($choice_1);
$choice_1->add($sub_1);
Bad:
$choice_1->add($sub_1);
$menu->add($choice_1); // Sub-choice will not show up!!
5 Write the menu to the page
This will output script tags with the javascript for the
rollovers and hiding of the menus as well as the menus
themselves
echo $menu->write();
Please send any questions, comments, or suggestions to
mttcks@hotmail.com with cascading_vertical_menu in the subject.
Any hints for optimizing and cleaning up this class are gladly
welcomed. I am also willing to help with any projects.
(especially if paid :)
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