Lab Extension

For my lab extension I decided to use lab 5-6, I will list below what I did for each extension, along with what I did for my additional custom ones.

Add the ability to delete grades using the swiping gesture, then remove the delete icon from the appBar.

Made a dismissible widget for each list entry
calls _deleteGrade for the onDismiss

Add the ability to edit grades using the long press gesture, with a popup menu, then remove the edit icon from the appBar.

Made an onLongPress prop that calls a popup

Add a single icon to the appBar that allows users to sort the grades in one of four ways (increasing/decreasing sid/grade).

IconButton on the appBar to handle sorting (three dots icon)
User can select between sorting by sid, or grade
Selecting either option will sort ascending, selecting the same option again will toggle between ascending/descending

Add an icon to the appBar that shows a DataTable, which generates a vertical bar chart of the grade data. The Y axis should be frequency, and the X axis should be the grade in ascending order.

Button takes user to a seperate screen with the mentioned information

Add an icon to the appBar that enables a user to import a .csv file from local files to populate the list of grades. The csv file should have 2 columns (sid, grade) and append all new grades to the existing list of grades.

Made a "Plus" button on the appBar that does this

Add two more features of your choice other than those listed here. Mention these features explicitly in your README.md.

Feature 1: .csv export

Added a new button on the appBar that exports the data as a .csv file
Output path is presented to the user as a popup

Feature 2: Student grading info is now categorized by class

Grade entries all have a new column/value: classValue
This represents which class their grade is from (English, Math, etc)
ListView elements are wrapped in ExpansionTiles, which are expandable sections that display the class name
Sort method now performs the sorting within each class category