When are controller methods called in WD4A? -


can explain me when methods called in wd4a applications? particularly methods defined in application controller (and not view (controllers)). i'm looking @ sample codes , there's supply_unit method in componentcontroller reads few values table , puts these in controller context available in view_2, based on context node assigned value user on view_1.

but don't see @ point method get's called (the application has more these 2 views) , how application knows needs called can shown in view_2

sap's standard documentation webdynpro pretty good, , goes through of this. page (and pages below it) describe programming controller methods in general. suggest taking couple days , working through of webdynpro abap documentation, coding examples go. you'll have more complete understanding way.

methods should implemented in component controller (as opposed view controller) when logic of method used (or may used) across multiple views. example, if have context node thats displayed in multiple nodes (like list of units of measure), makes sense program it's supply method once in controller, instead of in each view.

your question seemed more supply functions (supply_unit sounds name of supply function). these methods called automatically system first time context node read. used initialize contents of node. more info can found here.


Comments

Post a Comment

Popular posts from this blog

SPSS keyboard combination alters encoding -

my question not have programming practical issue on spss. accident keyword combination cannot remember because did not intend press changed encoding in spss , text in data in different language english shown small boxes. nevertheless, when kind of analysis performed different language text shown in output. does know reason? tried change encoding did not produce result. first, @ edit > options , see whether setting unicode or locale. might fix it. if have text in multiple languages, want unicode. otherwise, may have specific locale set wrong. can change set locale, need know locale want use.
Read more

Add new record to the table by click on the button in Microsoft Access -

in ms access form want implement separate button, adds new record table. in order added button , attached button event: private sub btnaddrec_click() refresh codecontextobject on error resume next docmd.gotorecord , , acnewrec if err.number <> 0 btnaddrec.enabled = false end if end end sub everything ok when open window , click btnaddrec button, problem when first of perform navigation through existed records , after click on button. got runtime error: 2105: «you can't go specified record. may @ end of recordset» . how solve issue, need have ability add new record on click on specific button, no matter, have walked or not walked through records before. thanks. i created simple form field call description (and autonumber) , created button code follows click event. filled number of records , navigated through them, clicked addnewrec button. form navigated new record without issues. able click addnewrec button directly after
Read more

javascript - jQuery .height() return 0 when visible but non-0 when hidden -

i have problem here right opposite others: in jquery cannot height of element when it's visible, when hidden. have html code: <div id="filtering-filter-holder"> <div id="filtering-filter-holder-inner"></div> </div> basic css it: #filtering-filter-holder { display: none; position: absolute; width: 420px; min-height: 100px; padding: 5px 5px 5px 5px; background-color: #ffffff; border: 1px solid #164372; } and finally, js in document.ready(): $('div.filtering-filter-headline').mouseenter(function() { var el = $(this).parent().find('div.filtering-filter-content'); if ($('div#filtering-filter-holder').is(':visible')) { $('div#filtering-filter-holder-inner').stop(true, true).fadeout(300, function() { $('div#filtering-filter-holder-inner').html($(el).html()); var height = $('div#filtering-filter-holder-inner&#
Read more