Annotation2D
From IGSTK
New Features Requested
- Capability to modify the annotation text
- In the current version, the annotation can only be specified at the beginning and can never be modified
- Capability to modify the annotation text property
- When the render window is resized, the annotation's corner position should be updated automatically.
- Update the annotation view port when the render window is resized
Modifications to the Class
- Modify the state machine to allow text and property changes in any order
- Move the method that sets the annotation viewport to protected section.
- In the current version, the RequestSetAnnotationsViewPort method is in the public section. This should be changed.
- Make the View class to be a friend of the Annotation 2D class so that the view class can invoke the RequestSetAnnotationsViewPort
- In the UpdateSize() method of the View class, update the ViewPort of the Annotation 2D object
- Add Safeguards to make sure the annotation text is displayed properly
- Add a maximum size constraint on the font size
- Check for overlapping text
- These safeguards should work also when the ViewPort is resized
- Look at replacing the vtkActor2D with a vtkTextActor in the annotation 2D class
- Define the SetJustification() for every one of the actors, according to whether they are on the left or the right side of the viewport.
Test Use Cases
- Test all combinations of
- Resizing the View (via the main application Window)
- Changing font size
- Changing font color
- Changing the text content
- This is four features, that tested in every order require : 4*3*2*1 = 24 tests
- Additional tests will be required for the four corners. (4 corners x 4 features ) = 16
- Add regression tests for verifying the rendering of the text.
- Test the use of special characters in the String
- "\n" for multi-line
- Verify its behavior on the bottom annotations.
- "\t" ? do we want to support it
- "\\" ??
- Support adding a "file name" type of string ?
- For example "C:\Program Files\Data\Patient"
