genericinfo Class
In this particular scenario, we are going to create three classes. That’s right, three classes. One for managing the data and two sub-classes for drawing the boxes. Let’s start with the managing data class (which we’ll call genericinfo). Here’s the code:
<?php
class genericinfo {
//Set up the Object, reserving memory space for variables
var $outerwidth;
var $outerbordercolor;
var $outerborderwidth;
var $titlebgcolor;
var $innerwidth;
var $innerbgcolor;
// Textual variables
var $title;
// Style vairables
var $cssboxtitle;
/*
Use these functions to get and set the values of this
object's variables. This is good OO practice, as it means
that datatype checking can be completed and errors raised accordingly.
*/
function setouterwidth($req_outerwidth) {
$this->outerwidth = $req_outerwidth;
}
function getouterwidth() {
return $this->getouterwidth;
}
function setouterbordercolor($req_outerbordercolor) {
$this->outerbordercolor = $req_outerbordercolor;
}
function getouterbordercolor() {
return $this->outerbordercolor;
}
function setouterborderwidth($req_outerborderwidth) {
$this->outerborderwidth = $req_outerborderwidth;
}
function getouterborderwidth() {
return $this->outerborderwidth;
}
function settitlebgcolor($req_titlebgcolor) {
$this->titlebgcolor = $req_titlebgcolor;
}
function gettitlebgcolor() {
return $this->titlebgcolor;
}
function setinnerwidth($req_innerwidth) {
$this->innerwidth = $req_innerwidth;
}
function getinnerwidth() {
return $this->innerwidth;
}
function setinnerbgcolor($req_innerbgcolor) {
$this->innerbgcolor = $req_innerbgcolor;
}
function getinnerbgcolor() {
return $this->innerbgcolor;
}
function settitle($req_title) {
$this->title = $req_title;
}
function gettitle() {
return $this->title;
}
function setcssboxtitle($req_cssboxtitle) {
$this->cssboxtitle = $req_cssboxtitle;
}
function getcssboxtitle() {
return $this->cssboxtitle;
}
/*
This is the constructor for the object. In this case I have set the initial
values of a number of the object properties to those values declared in the
global constants.inc. By doing this, I only need to change the values of
these properties for specific operations, which we will not need to
do throughout this example
*/
function genericinfo() {
global $COLOR_PRIMARY, $COLOR_SECONDARY, $COLOR_TERTIARY;
global $CSSBOXTITLE;
$this->setouterwidth(150);
$this->setouterbordercolor($COLOR_TERTIARY);
$this->setouterborderwidth(1);
$this->settitlebgcolor($COLOR_PRIMARY);
$this->setinnerwidth(146);
$this->setinnerbgcolor($COLOR_SECONDARY);
if (isset($CSSBOXTITLE)) {
$this->setcssboxtitle($CSSBOXTITLE);
}
}
// Methods
}
?>
You will no doubt notice from this that there are no methods for the class. Why? Well, I guess in a
practical situation you might well choose to combine these three objects into one, simply changing the methods
according to the desired box. However, this is a real-life example of using classes and sub-classes
(“inheritance”) and the reason I have chosen to sub-class is so that as I add more flavours of box (eg,
curved corners), I can create further sub-class(es); increasing the portability of the right code.
practical situation you might well choose to combine these three objects into one, simply changing the methods
according to the desired box. However, this is a real-life example of using classes and sub-classes
(“inheritance”) and the reason I have chosen to sub-class is so that as I add more flavours of box (eg,
curved corners), I can create further sub-class(es); increasing the portability of the right code.
