Tuesday, June 21, 2016

Oracle Form Alert



In the name of Allah, Most Gracious, Most Merciful
Praise be to Allah, blessing and peace be upon our prophet Mohammed, his family and his companions. After that,


     Oracle forms is quite aware of  the need of the user interactive messages. For this purpose  it specifies a form object called 'Alert'  An Alert creates a modal window like  with a tailored button actions  fits his needs

   In fact, the user needs an application to realize and prospect his needs to facilitate his job tasks at the least expected time and effort.

 One of the ways that leads to an application user satisfaction is creating a dialog with him as if he is setting at a restaurant talking with the waiter about his preferences through these Alert buttons that enable interactive message. It grants  more secure and  flexible interactive choices.


Task Definition:   


Create and display an Alert message.


Task Solution:

There are two ways for performing this task:

1.     Pro grammatically.
2.     Non- Pro-grammatically.

Both methods will display an interactive alert message. The only difference is in the programmatic method you can use only one Form's Alert with many customized message text as needed. On the other hand, the non-programmatic method needs you to create a predefined  form's Alert for every interactive message, since it uses the text message defined in the for's Alert property. 

I will discuss the programmatic methods for it's flexibility and reliability.

Now, let's assume

programmatic Our requirement is to create and display an interactive message to the application user before taking a specific action as ensuring him if he intending to delete the current record or not.


Three Steps to Follow:

 1- Create a form's Alert; select an Alert object's node from Object navigator. Then, press the create button on the toolbar to create an alert. Rename it DELETE_ALERT.

2- Create a  KEY-DELREC Trigger form level.

3- Use the following code:  


DECLARE
     al_id      ALERT;
     al_btn   NUMBER;

BEGIN

     -- Check  the Alert's name  existence ----
     
          al_id := Find_Alert('DELETE_ALERT');

     IF Id_Null(al_id) THEN NULL;

         ELSE
   
      --- If  the alert exists then label buttons
                      
                Set_Alert_Property(al_id,ALERT_MESSAGE_TEXT,'Do you want  to delete this record ? ');
                Set_Alert_Button_Property(al_id, ALERT_BUTTON1,LABEL,'YES');
                Set_Alert_Button_Property(al_id, ALERT_BUTTON2,LABEL,'NO');         
     
        --- Display The Alert's message ---

      al_btn := Show_Alert( al_id );
   
      -- Start customizing Alert's buttons functionality --
   
      IF (al_btn = ALERT_BUTTON1) THEN

                 DELETE_RECORD;
                 COMMIT_FORM;

      ELSIF (al_btn = ALERT_BUTTON2) THEN
  
          MESSAGE('Deletion is cancelled');
           PAUSE;
           GO_BLOCK('current_block');
           GO_ITEM('current_block.item_name');

       END IF;

   END IF;

END;



Note:

 In my opinion, i think an Oracle Developer can optimize his time by creating at most one or three Alert objects  for the whole  application.
It's a quite good idea to create a  library package to inherit this Alert object & it's code to all application forms to simplify this task.

Learn more about:

·             Menu Item Enable/Disable


Hope this helps...

My success only comes from Allah, pls. note your comments and suggestions are great help for me in progress thanks in advance.





Post a Comment