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RPG is a time tested development language. Open Access for RPG is supported by IBM and IBM i as an integral component to expanding business value and success. looksoftware and RPG Pioneer Pascal Polverini amongst other platform experts have developed Open Display File Technology to power your mobile and application modernization efforts on IBM i. Explore DOM control, layout and attributes for GUI in this episode.
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The RPG DudeThe RPG Dudeand Open Display Files
Pascal Polverini
2GUI Properties Control
(DOM Control)
Take a seat while the meeting starts…
RPG preamble
To design an interactive program you have to create a display and then create a RPG pgm to reference it
1
You can use SDA, RDp or a third party tool to design the display
You can use PDM or RDp to code the RPG
2
3
RPG preambleTo design the display:
• You can design a display within a 5250 environmentOr • You can design a rich open display (mobile, browser, desktop)
In 5250 environment, the design possibilities are limited and a DDS format is directly produced for the display description.
In open environment, the design possibilities are wider as open formats can be used for the display description to incorporate rich UI elements and capacities.
RPG preambleDisplay layout/attributes control
5250
DSPF
DDS
RPG
indicators
Open
DSPF
DOM
?
RPG preambleDisplay layout/attributes control
Open
DSPF
DOM
?
The control of the DOM could be:• Local (in JavaScript for
browser)?• Central (in RPG)?
• Monitored with another field, visible or hidden?
• Monitored with indicators?
RPG preambleDisplay layout/attributes control
The control of the DOM could be:• Local (in JavaScript for
browser)• Central (in RPG)
• Monitored with another field, visible or hidden
• Monitored with indicatorsBad because indicators are limited in meaning and numbers.
Bad because business logic will be split in different locations, central and local: hard to maintain.
RPG preambleDisplay layout/attributes control
The control of the DOM could be:• Local (in JavaScript for
browser)• Central (in RPG)
• Monitored with another field, visible or hidden
• Monitored with indicators
Ideally what we want is the possibility to control the all DOM directly in RPG with simple fields.
Like “This RPG field controls the address of an image” or
this other controls the visibility or focus of a tab or the content of a combo-list!
Now, let’s talk aboutThe RPG Dude
-and particularly about
His Open display file perspective
The RPG Dude
You remember him…
Still the same with so many applications to maintain and to develop…
The RPG Dude
Here is his boss, who loves GUI properties control, but loves even more, Market properties control!
The RPG Dude
And before going to show you the customer…
I will present you…
The RPG Dude
The GUI Dude!
Who is hidden here, but he’s got the power to it make rain or shine for your UI app!
Lets call him the “Hidden GUI Dude”
The RPG Dude
Then, our RPG Dude has to control the all DOM (Any display fields or control layout/properties)…
With simple fields in RPG!
?
The RPG Dude
And this, without him having to do weird things…
Or to mutate himself
The RPG Dude
“Venus Vedi Vinci” ?
Nope…Venus and you don’t want to Vedi!
Or to charm anyone…
The RPG Dude
Does such a solution exist?
To use simple, native RPG fields… to control any GUI properties. Could it be the almighty DOM ???
The RPG Dude
Well, we have our Hidden GUI Dude!
The Dude who’s got the power to make
rain or shine ?!!
The RPG Dude
And he had an idea!
The RPG Dude
And he had an idea!
Create mapping between your RPG field and the GUI property you want to control.
The RPG Dude
For example:
My RPG field prodImagemapped to myImg.Picture which represents the Address property of the image myImg.
The RPG Dude
For example:
My RPG field prodListmapped to myCombo.List which represents the List property of the combo-box myCombo.
The RPG Dude
For example:
My RPG field tabFocusmapped to myTab.ActivePageIndexwhich represents the index of which tabPagehas the focus.
The RPG Dude
For example:
A default value can optionally be indicated but the point is that the RPG can control the property dynamically and at every I/O.
And the RPG could also read any property value!
Noooo really? Wow !!
The RPG Dude
In the next episode, we will talk about DB reference !
The RPG Dude
It should be a series on TV now?
Didn’t they say they were going to show us the customer?
www.looksoftware.comwww.looksoftware.com
Learn more about Open Display Files:
View a recent webinar on Open Display Files: http://go.looksoftware.com/open-display-files-deep-dive-slideshare
Learn about our solution with Open Display Files: http://go.looksoftware.com/version-101-info-page-slideshare
