Hiding fields in phtmlb:formLayout (new thread)

Original Thread:
hiding fields in a bsp...
What Kevin is talking about, is some special development we did for HR eRecruitement. Well, let us turn it around. They helped us, and we returned the favour. And yes, this is actually some of the more interesting bits and pieces of BSP. (Fresh meat to discuss:).
Effectively, the <phtmlb:formLayout> has two functionalities. The first is a very easy way to layout a form. The second is a way via customization to dynamically have customers overwrite the visibility/required property of each field. So the SAP puts the maximum number of fields into the formlayout, and the customer can then via customization remove some, flag some as required, etc.
(If anybody should feel like writing a long weblog on this, I will provide technical detail, plus examples offline.)
The interesting database tables are these PHTMLB_FLI* ones. Part of the agreement was that the application itself provides for a UI to update the table. Also, the application itself controls which fields are changable.
If you really want to play, look at SBSPEXT_PHTMLB, the formLayout example. In the top part, there are also a serious of dropdown listboxes. What these do, is that they update the customization tables first, before the formlayout is rendered. So what you are seeing is actually the formlayout as it has been programmed, plus then the effects of a (customer) customization on it.
Also the example shows the effect of using an XML bee to dynamically add entries into the fieldLayout (if the application added these hooks).
brian

Hallo Thomas,
No, unfortunately we never build something to also customize the labels. They HR colleagues did not ask for this :).
I first started to write you here a loong text with answers. But then I got lazy, and searched my archive mailbox. Here below is the draft input that I wrote initially for the documentation. It describes everything pretty good. (But it is draft document, never proofread again, so read it lightly!)
bye, brian
Why?
Typically when an application is developed at SAP, the developer must make provision for all possible fields of information that must be displayed and/or queried from the user. However, in specific business cases, or depending on specific country laws, all fields might not be required. Also in some cases, fields in one scenario can be flagged required, versus in another they are only optional.
The typical starting point will be a complete formlayout done during the development. On top of this a customization layer is placed. The automatic reading and applying of the customization layer is automatically done by the phtmlb fL.
What?
For each field, a default behaviour is assumed. This is the behaviour that is defined by the developer during development time. For example, it could be specified that email address must be required. During the runtime it is now possible to overwrite the default behaviour with a customization entry for the field.
The following options are supported:
As Defined: The formLayoutItem in displayed as it has been defined during development.
Invisible: The formLayoutItem is not placed on the formLayout. It is immediately removed. All following items below it, will be moved up to fill its position.
Hidden: In this case, the formLayoutItem is placed on the formLayout, but not displayed. The item reserves its slot, and an empty slot will be displayed. However, after all items have been placed on the formLayout, a row "compression" is done, whereby all rows that contain only hidden elements are removed. Hidden is important for cases where columns next to one another must align. A typical example would be name & surname horizontally aligned. If now one item is invisible before this row, the two items will not be aligned anymore. With hidden, this alignment will be kept, and we still have the benefit of empty rows been removed.
Required: Sets the required flag for the item. Label of item will be rendered an indication that it is required (usually little red asterix after the label).
Optional: Can be used to customize a required field to be not required.
Read Only: Field value is only displayed.
What is index?
Customization is stored for a formLayout under the key that is build from the BSP application namespace, BSP application name, plus the page/view on which the formLayout is placed. It is assumed that there will only be one formLayout per view. A typical example would be:
SAP/SBSPEXT_PHTMLB/FORMLAYOUTSAMPLE.HTM
In addition, a customization key must be specified. Typical examples would be to say this is the default customization for USA, or for the specific branchen Losuegn. The customization key must be supplied with the <phtmlb:fL> tag, and only then will the customization data be read from the database.
Tables
For customization there are three interesting tables.
The first table PHTMLB_FLI is completed by the developer, and defines a list of all the formLayout items that can be customized. Only for those flItems which customization is possible, will entries be made in this table. The table contains three components:
NS_APPL_PAGE This is the unique key that identies the formLayout, consisting of namespace, application and page/view.
FLI_ID Id string of the specific formLayoutItem.
COMPONENT This is software component to which development applies, for example SAP_BASIS for all BSP development work done by us.
The second table PHTMLB_FLI_TEXT is just a language dependant text table that describes each item in the formLayout.
The tables PHTMLB_FLI and PHTMLB_FLI_TEXT are not using during the runtime. They are only of interest for design time. Note that NO tools are provided to make any entries in these tables. This is considered to be in the application domain, and will usually be part of the customization process of the application.
The third table PHTMLB_FLI_CUST is the only table that is read during the runtime. It is assumed that a customization tool has made the relevant entries for this table.
NS_APPL_PAGE see above
VARIANT_KEY This is the specific customization layer that is currently active. This string is equavalent to <pthmlb:fL customizationKey>. It is used to pull a specific customization.
FLI_ID see above
MODIFIER This is the new value to apply. For the possible values, see DDIC domain PHTMLB_FLI_MODIFIER.
For an example of customization, see BSP application SBSPEXT_PHTMLB, pages formLayout.htm. In this example, the customization can quickly be set via dropdown listboxes. On each request the PHTMLB_FLI_CUST is quickly updated and then the formLayout will find the set of new customization data to use.

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2.JPG ‏42 KB
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