ArithmeticOperators.m

%{ 
ArithmeticOperators class:
      Manages the arithmetic operator buttons for the calculator.
      This class is responsible for creating buttons for operations like addition,
      subtraction, multiplication, and division. It handles the user interactions with
      these buttons, appending the selected operator to the current input expression.


        Hardcoding used for:
                - The text and name for each operator button
                - Assigning the callback function of each operator button 
                - The positioning of each operator button
%}
classdef ArithmeticOperators
        properties
                ParentContainer        % Parent container for the operator buttons
                InputExpression        % Reference to the input expression field
        end
    





        methods
                function obj = ArithmeticOperators(parent, inputExpr)
                        %{                              
                                Constructor for ArithmeticOperators class. Initializes operator buttons.
                        %}  


                        obj.ParentContainer = parent;
                        obj.InputExpression = inputExpr;
                        % Create operator buttons
                        obj.createButtons();
                end
        







                function createButtons(obj)
                        %{                              
                                Dynamically creates buttons for each arithmetic operator.
                        %}  

           
                        % Define operators and their positions
                        operators = {'+', '-', '*', '/'};


                        % Adjust positions to be right-aligned with the number pad
                        positions = [250, 235, 50, 30; 250, 195, 50, 30; 305, 235, 50, 30; 305, 195, 50, 30];  
            

                        % Iterate through operators to create buttons
                        for i = 1:length(operators)
                                op = operators{i};
                                pos = positions(i, :);
                                % Button creation with callback to append operator
                                uibutton(obj.ParentContainer, 'Text', op, 'Position', pos, ...
                                        'ButtonPushedFcn', @(btn,event) obj.appendToExpression(op));
                        end
                end
        







                function appendToExpression(obj, char)
                        %{                              
                                Appends the selected arithmetic operator to the input expression.
                        %}  


                        % Append operator to input field
                        currentExpr = obj.InputExpression.Value;
                        obj.InputExpression.Value = [currentExpr, char];
                end








    end
end