/*_____________________________________________________________

      C S 1 3 1  W O R K I N G   W I TH   S T R U C T S
	                 Ron Kessler
	    
______________________________________________________________
*/

/*This project introduces you structures which used to be called "User-defined types" which
is a much better description. Before the advent of relational databases, these data structures
were very handy and made it easy to handle related pieces of data. This demo shows how to create
a data structure based upon an employee. Instead of creating variables for first, last, id, etc., I will
create a new data type and give it a name. I can then use it like any other data type in.net.

*/
	//***********START OF MY CODE****************

		//---create my new data structure
		value struct Payroll			//value structs are created on the stack which speeds up cleanup!

		{	int id;		//---members of the structure
			String^ firstName;
			String^ lastName;
			double hourlyRate;
			String^ division;

		};

		//---create variable of Payroll type
		Payroll myEmployee;
private: System::Void btnCalc_Click(System::Object^  sender, System::EventArgs^  e) 
		 		 
		 {
			//---validate all textboxes for nulls & calculate if valid
			 if(ValidateForm())
			{
				//---input the data
				myEmployee.id = int::Parse(txtID->Text->Trim());
				myEmployee.firstName= txtFirst->Text->Trim();
				myEmployee.lastName= txtLast->Text->Trim();
				myEmployee.division = txtDivision->Text->Trim();
				myEmployee.hourlyRate = double::Parse( txtPayGrade->Text->Trim());
				
				//---process it
				int hours =int::Parse( txtHours->Text->Trim());
				double grossPay = ComputePay(myEmployee.hourlyRate, hours);

				//---display result
				 lblGrossPay->Text = grossPay.ToString("n2");

			
			}	
	 }

 //************HELPER METHODS**************

  private:double ComputePay(double payRate, int hours)
	  {
		  
	  return payRate * hours;
			  
	  }

 private: bool ValidateForm()
	  {
	   for each(Control^ myControl in this->Controls)
		 if(myControl->GetType() ==TextBox::typeid)
			 if(myControl->Text->Trim() == "")
			 {
                        	MessageBox::Show("Please enter all data.", "Payroll Dept.", MessageBoxButtons::OK, MessageBoxIcon::Error);
				return false;
					 
			 }
			        return true;
	  }