/// <summary>
/// Prepare for Anglular addition or Subtraction.
/// This method performs the following actions.
/// 1. ClearResults Field.
/// 2. Checks Input for errors.
/// 3. Convert Null entries to zero and Create Angles if there is no input errors.
/// 4. Performs addition or subtraction of angles according to operation parameter passed
/// </summary>
private async void AngleOperationPreparation(string operation)
{
INPUT_VALIDATION_FLAG inputFlag;
ClearResults();
// Check input for errors
inputFlag = CheckAllInput();
if (inputFlag == INPUT_VALIDATION_FLAG.INPUT_OK)
{
// Convert empty fields to zero
ConvertNullToZero();
// Create angle objects so we can do angular subtraction or addition
CreateAngles();
if (operation == "add")
{
_result = _angle1.AddAngle(_angle2);
}
else
{
_result = _angle1.SubtractAngle(_angle2);
}
}
else
{
// Check for no entry of data
if (inputFlag == INPUT_VALIDATION_FLAG.NO_INPUT_ENTERED)
{
await _pageService.DisplayAlert("No Data Entered", "Please enter some data", "Ok");
return;
}
// Check for Numeric data errors
if (inputFlag == INPUT_VALIDATION_FLAG.NON_NUMERICAL_DATA_ENTERED)
{
await _pageService.DisplayAlert("Numerical Data Error", "Please enter Integer numerical data (No decimals)", "Ok");
return;
}
// Check for Degrees out of range errors
if (inputFlag == INPUT_VALIDATION_FLAG.NUMBER_OUT_OF_RANGE_DEGREES)
{
await _pageService.DisplayAlert("Out of Range Error", "Please enter a value between 0 and 359 in the degrees field", "Ok");
return;
}
// Check for Degrees out of range errors
if (inputFlag == INPUT_VALIDATION_FLAG.NUMBER_OUT_OF_RANGE_MINUTES)
{
await _pageService.DisplayAlert("Out of Range Error", "Please enter a value between 0 and 59 in the minutes field", "Ok");
return;
}
// Check for Degrees out of range errors
if (inputFlag == INPUT_VALIDATION_FLAG.NUMBER_OUT_OF_RANGE_SECONDS)
{
await _pageService.DisplayAlert("Out of Range Error", "Please enter a value between 0 and 59 in the seconds field", "Ok");
return;
}
}
}
