The D2D Extension Framework

1
The D-2D Extension Framework
2

What's an Extension?
3
D-2D Extensions
4
Whats a Framework?
5
Notation
Aggregation
BaseClass
ComposingClass
ComposedClass
ComposingClass
MoreThanOne
DerivedClass
Reference
ClassName
Class
Class
method()
data
anObject
anotherObject
objReference
AbstractClass
data
abstractMeth()
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Example of Notation Use
7
Example of Notation Use
Compiler
void compile()
_p
_errors
Program
FortranCompiler
ErrorList
Error
void compile() ErrorList getErrors()
void addError()
Error_errorArray
Program _p ErrorList _errors
8
Composition of an Extension
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Making an Extension
Extension
10
Making an Extension
Extension
LatLonLocator
InteractiveDepictExt
EditableElement
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Information Files Extension Key
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Extension Information
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Information Files Depict Key
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File Format for Depictable Information
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Static versus Nonstatic
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Static versus Nonstatic
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Information Files Product Buttons
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Product Button Keys and Extensions
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Information Files Menus
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Restart D-2D
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Developing Extensions
22
Developing Extensions
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The Extension Methods
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The Extension Methods
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Constructing an Extension
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Constructing an Extension
Extension
LatLonLocator
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Drawing
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Class InteractiveDepictableExt
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Semantics of Drawing
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Unique IDs
31
When to Draw
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Handling Changes in the Int Depict Sequence
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When the Int Depict Sequence Changes
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Initial Drawing
35
Initial Drawing
Extension
LatLonLocator
InteractiveDepictExt
EditableElement
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Editable Elements
Extension
EditablePoint
EditableLine
EditablePointSeq
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Properties of Editable Elements
X CROSS_HAIRS CIRCLE BULLSEYE SQUARE TRIANGLE
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Editable Element Methods
39
Shared Editable Elements
1000
1006
1012
1018
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Advantages of Shared Elements
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Editable Element Events
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Reacting to Editable Element Events
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Overriding the editedPoint Method
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Integrating an Extension
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Using the Extension Factory
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Class/Object Diagrams
Extension
LatLonLocator
InteractiveDepictExt
EditableElement
aLatLonLocator
anIntDepictExt
anEditablePoint
47
Location Selection
48
Tricks and Tips Speeding Up Drawing
49
Tips and Tricks Running a Lone IGC
50
Summary
51
End Notes

• This document was created April 1997, probably by
  Sean Kelly. The material was used for a
  presentation to the Taiwan CWB, and is included
  in a spiral-bound document titled WFO-Advanced
  Seminar. It was recreated December 2005 by John
  Osborn from a hard copy. The most recent edits
  are by Joe Wakefield, March 2006.