Booa8 Slide 03

Buliding Object-Oriented Applications in PowerBuilder Module 3: Inheritance

Objectives ,[object Object],[object Object],[object Object],[object Object]

Topics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inheritance ,[object Object],Grady Booch

Inheritance — Terminology ,[object Object],[object Object],[object Object],[object Object]

PowerBuilder System Classes ,[object Object],[object Object]

Try It - Browser ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Inheritance — PowerBuilder

Inheritance — "New" Classes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exported Syntax

Inheritance Mechanics (method 1) ,[object Object],[object Object],[object Object]

Inheritance — Mechanics (method 2) PowerBuilder New Feature

Syntax — Inherited Window ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inheritance — Class Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object]

PowerBuilder System Class Hierarchy

Building a Class Hierarchy ,[object Object],[object Object],[object Object],[object Object]

User-Defined Class Hierarchy — Windows Abstract classes w_master w_detail Base classes w_main Concrete classes w_invoice w_customer w_lineitem w_order

Building a Class Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Building a Class Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Building a Class Hierarchy Abstract class {w_main} Concrete classes w_ap_main w_ar_main

Building a Class Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inheritance — Class Hierarchies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inheritance — Class Hierarchies ,[object Object],[object Object],[object Object]

[object Object],Hierarchy Design Issue Abstract class {w_main} Concrete classes w_cust w_invoice

Hierarchy Design Issue ,[object Object],Abstract class Concrete classes {w_main} w_cust of_Resize( ) w_invoice of_Resize( ) w_response

Extension Layer ,[object Object],Abstract classes {w_main} Concrete classes {w_app_main} of Resize( ) {w_app_resp} w_cust w_invoice w_response

Extension Layers and Frameworks ,[object Object],[object Object],[object Object],[object Object],[object Object]

Hierarchy Levels ,[object Object],[object Object],[object Object],[object Object],[object Object]

Hierarchy Levels No Base Class ,[object Object],Power Builder system class Abstract classes {window} {w_sheet} {w_popup} {w_child}

Hierarchy Levels No Base Class ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Hierarchy Levels — Common Base Power Builder system class {window}

Hierarchy Levels — Common Base ,[object Object],Abstract classes {w_main} Power Builder system class {window}

Hierarchy Levels — Common Base ,[object Object],Power Builder system class Abstract classes {window} {w_sheet} {w_popup} {w_child} {w_main}

Hierarchy Levels — Common Base ,[object Object],Power Builder system class Abstract classes {window} {w_sheet} {w_popup} {w_child} {w_main} of_Resize( )

Hierarchy Levels — Common Base ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inheritance — Hierarchy Examples ,[object Object],[object Object],[object Object]

Window Ancestor — By Style ,[object Object],[object Object],[object Object],[object Object],[object Object]

Example — By Style ,[object Object],[object Object]

Window Ancestor — By Style ,[object Object],DoubleClicked! IF row>0 THEN dw_detail.Event ue_retrieve(row) END IF

Window Ancestor — By Style ,[object Object],[object Object],[object Object],[object Object]

Window Ancestor — By Type ,[object Object],[object Object],[object Object],[object Object],[object Object]

Window Ancestor — By Type {u_dw} {w_sheet} Abstract classes Concrete classes dw_list dw_detail {w_list_detail}

Window Ancestor — By Type ,[object Object],[object Object],[object Object],[object Object]

Window Hierarchy — By Type PowerBuilder system class Abstract classes {window} {w_anc_main} Type is main {w_anc_popup} {w_anc_sheet} {w_anc_child} {w_anc_response}

Summary ,[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object]

Lab Setup ,[object Object],[object Object],[object Object],[object Object]

Lab Debriefing ,[object Object],[object Object],[object Object]

Booa8 Slide 03

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Booa8 Slide 03