Showing posts with label VO. Show all posts
Showing posts with label VO. Show all posts

Monday, June 4, 2012

OAF Switcher Region: How to use it?

A Switcher region can be used to dynamically switch between the items to be displayed in a table or region.
This is similar to a CASE Statement in SQL. Depending on the input to the Switcher Region, it will display the items under the region.
Lets say, we have a requirement where we need to display Delete Icon as Enabled when Employee is In-Active and Delete Icon as Disabled when Employee is Active as shown below.
To Achieve this, We need to Create a Switcher Region in the Table where you want to display the Delete Icon. If you are using an Advanced Table, Follow the below Steps.
In the VO which populates these rows, make the following changes,
1. Create a Pseudo Column in the Query which returns "Delete_Disabled" or "Delete_Enabled" based on the Status value "Active" or "In-Active".
2. Once the SQL Statement is modified in the Query, DeleteSwitch Item is going to is going to return one the se 2 attributes as Inputs to Switcher Region ("DeleteDisabled" or "DeleteEnabled")

Now make the following changes in Page or Region
1. Create a New Column under Advanced Table where you want this Delete Icon to be displayed.
2. Right Click on the New Column that was created and Select New -- Switcher
3. Set the following Properties to the Switcher Region.
          ID: DeleteSwitcher
          Region Style: Switcher
          View Attribute: DeleteSwitcher
4. You will notice a new <case> item being created under the Switcher Region.
5. Set the following properties to the First Case Item.
          ID: DeleteDisabled
          Item Style: image
          Prompt: Delete
          Image URL: deleteicon_disabled.gif
          Rendered: True
6. Right Click on Switcher Region and Select New -- Case
7. For the New Item, Set the following Properties
          ID: DeleteEnabled
          Item Style: image
          Prompt: Delete
          Image URL: deleteicon_enabled.gif
          Rendered: True
8. Make sure you are giving the ID of the Item exactly matching with the View Attribute value being returned    by the DELETE_SWITCHER in the Sql Query of VO
9. Test run you page and you will notice that records with Status as "Active" have the Delete Icon Disabled and Status as "In-Active" have the Delete Icon Enabled.