Re: Extending QF Select

On Wed, 22 Dec 2004 16:05:17 +0300, Alexey Borzov <borz_off@cs.msu.su> wrote: > Hi, > > Aaron Wormus wrote: > > I need to create a simple Yes/No select element, but am doing something > > wrong and QF is creating the element with the number of options doubled > > (Yes / No / Yes / No). > > Constructors of elements are actually called *twice*. This is an > unfortunate design decision that cannot be fixed in current major > version of QuickForm. For those who would like to know why: The constructor is called once on instantiation and once in onQuickFormEvent. The instantiation call has *no parameters*, so all parameters to the constructor must have defaults. After instantiation, QF calls onQuickFormEvent on the element with a 'createElement' event. The default version of onQuickFormEvent calls the constructor when a 'createElement' event occurs. You can use this to your advantage by checking to see if there are any arguments to tell when the element is instantiated vs. populated. > > You can work around this issue by checking whether the options were > already set and not passing them again in this case. > > > Following is my class; > > > > class yesNo extends HTML_QuickForm_select { > > > > function yesNo(){ > > $options = array('1' => 'Yes', > > '0' => 'No'); $data = > > func_get_args(); > > parent::HTML_QuickForm_select($data[0], $data[1], $options); > > > > } > > } > -- Justin Patrin