Robert S Laramee
24 Nov 2011
Partial Solution to In-Class Exercise 2, CS-230 Software Engineering

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Class: Drawing Editor
Responsibilities:
1. Controls main flow of application e.g., where flow
   of execution starts and ends.
2. Instantiates program
3. Initializes GUI
4. Initializes any other necessary resources
5. Responsible for clean exit, ensuring data is saved on termination
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Class: User
Responsibilities:
1. Creating a new user
2. Saving username and password
3. Associating a user with a drawing
4. Deleting a user
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Class: Drawing
Responsibilities:
1. Creating/instantiating a new drawing
2. Editing a drawing
3. Saving a drawing
4. Displaying a drawing
5. Deleting a drawing
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Class: Line
Responsibilities:
1. Creating/instantiating a new line
2. Displaying a line
3. Editing a line
4. Displaying its control points
5. Deleting a line
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Class: Rectangle
Responsibilities:
1. Creating/instantiating a new rectangle
2. Displaying a rectangle
3. Editing a rectangle
4. Displaying its control points
5. Deleting a rectangle
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Class: Ellipse
Responsibilities:
1. Creating/instantiating a new ellipse
2. Displaying an ellipse
3. Editing an ellipse
4. Displaying its control points
5. Deleting an Ellipse
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Class: Text
Responsibilities:
1. Creating/instantiating new text
2. Saving Text
3. Displaying text
4. Editing text
5. Deleting text
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Class: Tool
Responsibilities:
1. Creating/instantiating a new tool
2. Controlling mode of operation
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Class: SelectionTool
Responsibilities:
1. Creating/instantiating a new selection tool
2. Selecting a drawing element
3. Grouping drawing elements together
4. Identifying/returning the current selection
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Class: CreationTool
Responsibilities:
1. Creating/instantiating a new creation tool
2. Creating a drawing element
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Class: DrawingElement (Element)
Responsibilities:
1. Creating/instantiating a new drawing element
2. Displaying a drawing element
3. Saving a drawing element
4. Editing a drawing element
5. Deleting a drawing element
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Class: Control Point
Responsibilities:
1. Creating/instantiating a new control point
2. Storing a control point's coordinates (x,y position).
3. Displaying a control point
4. Editing/updating a control point's position
5. Deleting a control point
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Class: Cursor
Responsibilities:
1. Storing the current cursor position (x,y)
2. Displaying the cursor
(See Java Cursor Class)
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Class: Time
Responsibilities:
1. Returning the current time
2. Displaying the time
(See Java Time Class)
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