文件名称：web dynpro abap programming guidelines
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更新时间：2013-01-04 10:52:13
web dynpro abap programming guidelines
Contents WEB DYNPRO ABAP: DEVELOPMENT IN DETAIL .............................................................. 1 1 BASICS............................................................................................................................. 1 1.1 Component................................................................................................................ 2 1.2 Web Dynpro View ..................................................................................................... 3 1.2.1 UI Elements of the View ................................................................................. 5 1.2.2 Structure of the View Context......................................................................... 7 1.2.3 Data Binding ................................................................................................... 8 1.2.4 UI Element Actions....................................................................................... 10 1.2.5 Action Event Handlers.................................................................................. 12 1.3 Component Controller ............................................................................................. 15 1.3.1 Context Mapping .......................................................................................... 16 1.4 Programming Controller Methods ........................................................................... 18 1.4.1 Reference Variable WD_CONTEXT ............................................................ 19 1.4.2 Reference Variable WD_THIS and Local Controller Interface..................... 19 1.4.3 Methods of the Local Controller Interface .................................................... 20 1.4.4 Web Dynpro Runtime APIs .......................................................................... 32 1.4.5 Filling the Context......................................................................................... 34 1.4.6 Phase Model................................................................................................. 35 1.4.7 Client Implementation................................................................................... 39 1.5 Web Dynpro Window .............................................................................................. 40 1.5.1 Navigation Between Two Views................................................................... 41 1.6 Web Dynpro Application.......................................................................................... 44 1.7 URL of a Web Dynpro Application .......................................................................... 45 1.7.1 Fully Qualified Domain Names (FQDN) ....................................................... 48 1.7.2 URLs and Namespaces ............................................................................... 53 1.8 Calling a Web Dynpro Application Using Parameters ............................................ 55 2 CROSS-COMPONENT PROGRAMMING....................................................................... 55 2.1 Controllers of a Web Dynpro Component............................................................... 56 2.2 Component Usages ................................................................................................ 58 2.2.1 Component Usage without Controller Access.............................................. 59 2.2.2 Component Usage with Controller Access................................................... 62 2.2.3 Navigation Through Window Plugs .............................................................. 63 2.2.4 Cross-Component Context Mapping............................................................ 64 2.3 Working with Web Dynpro Component Interfaces.................................................. 68 2.3.1 Creating a Web Dynpro Component Interface Definition............................. 70 2.3.2 Implementing a Web Dynpro Interface Definition......................................... 71 2.3.3 Example for the Implementation of an Interface Definition .......................... 71 2.4 Working With Faceless Components...................................................................... 74 3 DYNAMIC PROGRAMMING ........................................................................................... 74 3.1 Dynamic Layout Manipulation................................................................................. 75 3.1.1 Working Dynamically with Parameter Mappings.......................................... 77 3.2 Dynamic Context Manipulation ............................................................................... 79 3.3 Working Dynamically with Component Usages ...................................................... 80 3.3.1 Dynamically Creating Component Usages .................................................. 81 3.3.2 Dynamically Embedding an Interface View.................................................. 83 3.3.3 Method Call in a Dynamically Created Component Usage.......................... 85 3.3.4 Dynamically Registering an Event Handler to an Event............................... 86 4 ADVANCED CONCEPTS................................................................................................ 86 4.1 Working with the Assistance Class ......................................................................... 87 4.2 Service Calls in a Web Dynpro Application............................................................. 88 4.2.1 Creating a Service Call................................................................................. 88 4.2.2 Using a Service Call ..................................................................................... 89 4.3 Working with Dialog Boxes ..................................................................................... 90 4.3.1 Calling Dialog Boxes of the Same Component ............................................ 91 4.3.2 Calling Dialog Boxes of a Used Component................................................ 93 4.3.3 Calling a Confirmation Dialog Box................................................................ 94 4.4 Data Binding Concepts ........................................................................................... 95 4.4.1 Data Binding of User Interface Element Properties ..................................... 95 4.4.2 Data Binding Using Index and Key............................................................... 97 4.4.3 Fixed Values of Attributes ............................................................................ 98 4.4.4 Context Change Log (Recording User Entries).......................................... 100 4.5 Input Help .............................................................................................................. 102 4.5.1 ABAP Dictionary Search Help .................................................................... 102 4.5.2 OVS Input Help........................................................................................... 104 4.5.3 Freely Programmed Input Help .................................................................. 106 4.6 Messages.............................................................................................................. 107 4.6.1 Integration of Messages in the Message Log ............................................ 110 4.7 Handling Web Icons .............................................................................................. 112 4.8 File Export ............................................................................................................. 114 4.9 Portal Integration................................................................................................... 116 4.9.1 Binding to Portal: Prerequisites .................................................................. 117 4.9.2 Integrating an Application in the Portal....................................................... 117 4.9.3 Portal Events .............................................................................................. 120 4.9.4 Portal Navigation ........................................................................................ 123 4.9.5 Work Protect Mode..................................................................................... 131 4.10 Example ................................................................................................................ 133 4.11 Integrating Forms .................................................................................................. 133 4.11.1 Integrating a PDF Form in a Web Dynpro Application ............................... 134 4.11.2 Supported Elements of the Adobe Library ................................................. 136 4.11.3 Interactive Form Use .................................................................................. 137 4.11.4 Forms with Function Module-Based Interface............................................ 137 4.12 Personalization and Configuration ........................................................................ 138 4.12.1 Component Configuration .......................................................................... 139 4.12.2 Application Configuration ........................................................................... 141 4.12.3 Personalization........................................................................................... 143 4.12.4 Delta Handling in Customization and Personalization ............................... 144 4.12.5 Notes on Working with Adjustment Data.................................................... 146 4.12.6 Configuration of an Included ALV Component........................................... 147 4.13 Modification-Free Enhancements ......................................................................... 148 4.13.1 Implementing Enhancements in a View ..................................................... 149 4.13.2 Implementing Enhancements in the Controller .......................................... 150 4.13.3 Implementing Enhancements in a Window ................................................ 151 4.14 Integration of Web Dynpro ABAP Applications in GUI Applications ..................... 151 4.15 Accessibility of a Web Dynpro Application............................................................ 153 4.16 Internationalization and Translation ...................................................................... 156 4.17 SAP List Viewer in Web Dynpro for ABAP............................................................ 158 4.17.1 Integration of the ALV in Your Application ................................................. 158 4.17.2 Managing ALV Output Areas...................................................................... 166 4.17.3 Appearance of ALV Output ........................................................................ 182 4.17.4 Predefining Standard ALV Functions ......................................................... 190 4.17.5 Functions, Interactions, and Events ........................................................... 205 4.17.6 Methods and Events of the Interface Controller......................................... 219 4.18 Screen Design Time Conversion .......................................................................... 231 4.18.1 Restrictions................................................................................................. 232 4.18.2 Transformation Rules ................................................................................. 233 4.19 Version Comparisons in Web Dynpro for ABAP................................................... 247 4.20 Quality Assurance ................................................................................................. 248 4.20.1 Web Dynpro Trace Tool ............................................................................. 248 4.20.2 ICM Tracing ................................................................................................ 250 4.20.3 HTTP Browser Tracing............................................................................... 252 4.21 System Logon ....................................................................................................... 258 4.21.1 Prerequisites............................................................................................... 261 4.21.2 Configuration Settings ................................................................................ 262 4.21.3 Password Logon Scenarios........................................................................ 265 4.21.4 User-specific Changes ............................................................................... 268 4.21.5 URL Generation in an AS-ABAP - Web Dispatcher Configuration ............ 271 4.21.6 Examples of the Logon Screen .................................................................. 280