Oracle Forms | How to Create Property Class & Smart Class -33
Oracle Forms | How to Create Property Class & Smart Class -33
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Dear viewer, In this tutorial you will learn How to Create Property Class & SmartClass.
You also know about Property Class and Use Of Property Class, SmartClass, Difference between property class & visual attributes , About Inherited & Variant Property.
About Property Class:
A property class is a named object that contains a list of properties and their settings.
-Once you create a property class you can base other objects on it. An object based on a property class can inherit the setting of any property in the class that makes sense for that object.
-Property classes are separate objects, and, as such, can be copied between modules as needed. Perhaps more importantly, property classes can be subclassed in any number of modules.
Difference between property class & visual attributes :
1.Named visual attributes define only font, color, and pattern attributes;
property classes can contain these and any other properties.
2.We can not define the trigger for visual attributes ;
but We can define the trigger for property class.
3. You can change the appearance of objects at runtime by changing the named visual attribute programmatically;
property class assignment cannot be changed programmatically.
About Smartclass:
-A Smartclass is an Object library object that is defined as a standard object type for an application. Each object in an Object Library can be flagged as a SmartClass (green check mark).
-It is special member of an object library.
-It can be applied easily and rapidly to existing objects.
-A Smartclass is the preferred method to promot similarity among objects for performance.
Inherited Property:
-An inherited property is one that takes its value from the property class that we associated with the object.
-It is displayed with an arrow to the left of the property name.
Variant Property:
-A variant property is one whose value has been modified from the inherited value that comes from the property class associated with the object.
-We can override the setting of any inherited property to make that property variant.
It is displayed with a red cross over an arrow.
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