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Chapter 2: iTool System Architecture 21
iTool Developer’s Guide iTools Object Model Diagram
iTools Object Model Diagram
The following figure shows inheritance among the iTools component object classes that define the base
functionality of all iTools. The diagram is intended to provide a visual overview of the structure of the iTools,
and to provide a quick indication of the methods and properties available to objects of a given class. See the
IDL Reference Guide for details regarding the available properties and methods of these components.
Figure 2-1: iTools Object Model Hierarchy
- Programming 1
- Restricted Rights Notice 2
- Limitation of Warranty 2
- Export Control Information 2
- Acknowledgments 2
- Contents 3
- Overview of iTools 9
- What are iTools? 10
- About this Manual 12
- About the iTools Code Base 13
- Framework 15
- Part I: Understanding 17
- Architecture 19
- IDLitVisualization Classes 23
- IDLitTool Classes 23
- IDLitData Classes 24
- IDLitReader Classes 24
- IDLitWriter Classes 25
- IDLitOperation Classes 25
- IDLitManipulator Classes 26
- Atomic Graphic Objects 26
- • IDLgrPlot • IDLgrText 27
- • IDLgrPolygon • IDLgrVolume 27
- MY DATA object is visible to 28
- Using Identifiers 29
- Retrieving Identifiers 29
- Proxy Identifiers 30
- Object Descriptors 30
- OPERATIONS/OPERATIONS/ROTATE 31
- FILE READERS/ASCII TEXT 34
- FILE WRITERS/WINDOWS BITMAP 34
- MANIPULATORS/ROTATE 34
- OPERATIONS/FILE/OPEN 34
- TOOLBAR/FILE/OPEN 35
- WINDOW/VIEW_1 35
- Registering Components 38
- Specifying Object Identifiers 39
- Proxy Registration 39
- TOOLBAR/EDIT/UNDO: 40
- Sending Notifications 41
- Notification Messages 42
- Observers 43
- System Resources 44
- Help System 45
- Format of Help Entries 46
- Data Management 51
- 52 Chapter 3: Data Management 52
- Chapter 3: Data Management 53 53
- Composite Data Types 54
- Chapter 3: Data Management 55 55
- Data Objects 56
- Data Containers 56
- Parameter Sets 57
- Predefined iTool Data Classes 58
- IDLitDataIDLImage 59
- IDLitDataIDLImagePixels 59
- IDLitDataIDLPalette 59
- IDLitDataIDLPolyvertex 59
- IDLitDataIDLVector 60
- Parameters 61
- ParmameterName 62
- DataType1 62
- DataTypeN 62
- Data Type Matching 63
- 64 Chapter 3: Data Management 64
- Data Update Mechanism 65
- 66 Chapter 3: Data Management 66
- Property Management 67
- What is a Property? 68
- Properties vs. Preferences 68
- How are Properties Displayed? 69
- Property Data Types 69
- Property Registration 70
- Property Identifiers 70
- Property Attributes 70
- Property Aggregation 70
- User Defined Property Types 73
- Pre-Registered Properties 75
- USERDEF (Get, Set) 80
- VALID_RANGE (Get, Set) 80
- Intersection 82
- Property Update Mechanism 84
- Part II: Using the 87
- Creating an iTool 89
- Overview of iTool Creation 90
- Creating a New iTool Class 91
- PRO FirstExampleTool__Define 92
- Registering Visualizations 95
- Registering Operations 96
- Registering Manipulators 97
- ReaderType_Class_Name 98
- WriterType_Class_Name 98
- Unregistering Components 100
- Registering a New Tool Class 101
- Arguments 103
- Keywords 103
- Creating Data Objects 104
- Handling Errors 105
- Creating an iTool Instance 106
- Example: Simple iTool 108
- Launch Routine 110
- Launch Routine Discussion 111
- 'Palette' 112
- "Example 1 Tool" 112
- Creating a Visualization 113
- IDLitVisAxis 115
- IDLitVisColorbar 115
- IDLitVisContour 115
- IDLitVisHistogram 115
- IDLitVisImage 116
- IDLitVisImagePlane 116
- IDLitVisIntVol 116
- IDLitVisIsosurface 116
- IDLitVisLegend 117
- IDLitVisLegendItem 117
- IDLitVisLight 117
- IDLitVisLineProfile 117
- IDLitVisMapGrid 117
- IDLitVisPlot 118
- IDLitVisPlotProfile 118
- IDLitVisPlot3D 118
- IDLitVisPolygon 118
- IDLitVisPolyline 119
- IDLitVisRoi 119
- IDLitVisShapePoint 119
- IDLitVisShapePolygon 119
- IDLitVisShapePolyline 119
- IDLitVisSurface 120
- IDLitVisText 120
- IDLitVisVolume 120
- ObjectClass 121
- Creating an Init Method 123
- Superclass Initialization 124
- Return Value 125
- Registering Parameters 125
- Registering Properties 125
- PropertyIdentifier 126
- TypeCode] $ 126
- [, ATTRIBUTE = value] 126
- Object_Reference 126
- Setting Property Attributes 127
- Example Init Method 128
- Creating a Cleanup Method 130
- Creating a GetProperty Method 131
- Creating a SetProperty Method 132
- ExampleVis object’s 133
- _extra structure 133
- ExampleVis 135
- Specifying Useful Properties 136
- Finding the Identifier String 138
- Class Definition File 140
- Init Method 141
- OnDataChangeUpdate Method 142
- OnDataDisconnect Method 144
- Creating an Operation 145
- Predefined iTool Operations 148
- Data-Centric Operations 150
- Generalized Operations 151
- SomeOperationClass 156
- Creating an Execute Method 159
- ) ? 255b : MAX(data) 160
- ) ? 0b : MIN(data) 160
- Example SetProperty Method 163
- How an IDLitOperation Works 165
- Creating an IDLitOperation 165
- Creating a DoAction Method 172
- Example UndoOperation Method 178
- Example RedoOperation Method 179
- Operations and Macros 181
- Registering an Operation 182
- Unregistering an Operation 184
- Execute Method 188
- GetProperty Method 189
- SetProperty Method 190
- Creating a Manipulator 193
- Manipulator Visuals 195
- Predefined iTool Manipulators 198
- Image Manipulators 199
- Plot and Contour Manipulators 200
- Surface Manipulators 200
- Volume Manipulators 201
- The RecordUndoValues Method 203
- The CommitUndoValues Method 203
- Using the ButtonPress Field 204
- Creating a New Manipulator 206
- The Manipulator Init Function 208
- Creating Mouse Event Methods 213
- Creating an OnWheel Method 216
- Example OnWheel Method 217
- Creating an OnKeyboard Method 218
- ExampleManip operation: 221
- Registering a Manipulator 223
- Unregistering a Manipulator 225
- Creating a File Reader 229
- Predefined iTool File Readers 231
- IDLitReadISV 232
- IDLitReadJPEG 232
- IDLitReadJPEG2000 232
- IDLitReadPICT 232
- IDLitReadPNG 233
- IDLitReadShapefile 233
- IDLitReadTIFF 233
- IDLitReadWAV 233
- Creating a New File Reader 234
- SomeFileReaderClass 237
- Extensions 237
- Creating an IsA Method 242
- Creating a GetData Method 243
- Registering a File Reader 245
- Unregistering a File Reader 246
- Example: TIFF File Reader 248
- IsA Method 250
- GetData Method 250
- Creating a File Writer 253
- Predefined iTool File Writers 255
- IDLitWriteEMF 256
- IDLitWriteEPS 256
- IDLitWriteISV 256
- IDLitWriteJPEG 256
- IDLitWriteJPEG2000 257
- IDLitWritePICT 257
- IDLitWritePNG 257
- IDLitWriteTIFF 257
- Creating a New File Writer 258
- Creating a SetData Method 266
- Example SetData Method 267
- Registering a File Writer 269
- Unregistering a File Writer 270
- Example: TIFF File Writer 272
- SetData Method 273
- RETURN, 1 ; success 275
- Part III: Modifying the 277
- User Interface Objects 282
- Widget Registration Methods 283
- AddOnNotifyObserver Method 283
- DoAction Method 283
- Using iTool User 285
- Interface Elements 285
- The iTools Feedback Mechanism 286
- Status Messages 287
- PromptUserYesNo 289
- PromptUserText 290
- Informational Messages 291
- Creating a User 293
- Interface Service 293
- Predefined iTool UI Services 295
- Operation Preview Service 296
- Creating a New UI Service 297
- and yoffset values when 298
- YOFFSET = yoffset) 299
- ScaleFactor user 300
- Registering a UI Service 302
- ScaleFactor user interface 304
- Widget Creation Function 306
- Event-handling Routines 308
- Invoking the opName Operation 310
- Interface Panel 311
- Creating and Using a UI Panel 312
- Creating a UI Panel Interface 313
- Adding Observers 315
- Create the Widget Hierarchy 315
- Create Event Handlers 316
- Creating Callback Routines 318
- Simple UI Panel” on page 322 319
- Registering a UI Panel 320
- Example: A Simple UI Panel 322
- Panel Creation Routine 323
- Panel Event Handler Routine 325
- Panel Callback Routine 327
- Panel Type Specification 328
- Creating a Custom 331
- What About Using a UI Panel? 333
- What You Will Need to Create 334
- Create or Choose an iTool 335
- Create the Widget Interface 335
- Create Callback Routines 336
- Create a Cleanup Routine 336
- Routine Signature 340
- Error Checking 341
- Top Level Base 341
- User Interface Object 341
- Widget Creation and Layout 342
- User Interface Registration 342
- Handling Widget Destruction 342
- Adding Menus 344
- Resizing Menus 345
- Adding a Toolbar 346
- Modifying Toolbar Contents 347
- Resizing Toolbars 347
- Adding an iTool Window 348
- Resizing iTool Windows 349
- Adding a Status Bar 350
- Adding a User Interface Panel 351
- Handling Callbacks 352
- Handling Resize Events 354
- Handling Shutdown Events 356
- Writing a Cleanup Routine 357
- Calling the Cleanup Routine 357
- Register Your User Interface 358
- Use Your User Interface 358
- Discussion 366
- Controlling iTools from 379
- How to Control an iTool 380
- FindIdentifier Examples 382
- Property Value Information 386
- Changing Property Values 389
- Using the SetProperty Method 390
- Running Operations 391
- Selecting Items in the iTool 393
- Replacing Data in an iTool 394
- Using the SetData Method 395
- Appendix B 397
- CW_ITMENU 399
- Version History 402
- See Also 403
- CW_ITPANEL 404
- CW_ITSTATUSBAR 408
- CW_ITTOOLBAR 411
- CW_ITWINDOW 416
- Index iTool Developer’s Guide 420
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