curtesmith / cosc3p97-assignment1 Goto Github PK

As a user when I enter an operand, followed by the + operator, followed by another operand, followed by the + operator it should display the result so far and remember the next operation will be + so that I can continue the equation and the see the current result.

• modify the method in the model to check if there are 2 operators and an operation already entered and if so perform the calculate and update the display then store the operation to execute next

As a user when I tap a number that number should be added to the end of the display so that I can view what has been entered

• add textview to activity
• add button to activity
• add display property to model
• add click handler to activity to route control to model, update display property and notify observers

• add the button handler to the activity
• update the model to create the subtraction operation
• create the subtraction class from the operation abstract class

As a user when I tap the clear button it should set the display to zero and clear any stored operations so that I can begin a new equation.

• add clear button to activity
• add click handler to route control to the model and update the display to zero then notify observers

• create Multiplication class
• add multiplication to model
• add handler for multiplication button

• create new Division class
• add divide method to the model
• add handler for divide button to the activity

• update the model to allow decimals
• update the activity to handle a decimal button

As a user when I enter an operand, followed by the + operator, followed by another operand, followed by = it should display the result so that I can view the answer.

• add the "+" button to the activity
• add "+" click handler to route control to the model in order to store the operation and allow the user to enter a new operand, notify the observers
• add "=" click handler to route control to the model in order to do the stored operation and update the display property, notify the observers