KWWidgets/Projects/3DWidgets/Widgets/ChangingArchitecture

Analysis and overview of existing architecture

Architecture In order to apply the redesigned architecture regarding the vtk 3D Widgets, I had to first understand the old architecture, then how the new architecture was supposed to work and finally re-write the 3D widgets to match the new architecture.

This I commenced by looking at the vtkSliderWidget and how it interacts with the main classes regarding the restructuring project - the vtkAbstractWidget and vtkWidgetRepresentation classes and their derivatives.

Old architecture After looking at the was the 3D widgets worked under the old architecture, I made my own class diagram to help me understand it (as opposed to just copying the generated diagram from the vtk documentation).

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New architecture

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Analysis and overview of new architecture

Differences between the two architectures

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Comparing the two architectures

Methodology

• study both architectures
• study source code; vtkBoxWidget (Old) and vtkSliderWidget (new)
• separate source code into new classes
• study events
• compare vtkBoxWidget Old and New
• methods
  * added
  * removed
  * edited
• example code
  *changes to original

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