public override void ViewDidLoad()
{
base.ViewDidLoad();
//Get parent view layout
var margins = View.LayoutMarginsGuide;
var _tipCalModel = new ClsTipCalculator();
//assigning background color to view
View.BackgroundColor = UIColor.DarkGray;
//Text field to hold total amount user will pay
UITextField totalAmount = new UITextField();
totalAmount.Frame = new CoreGraphics.CGRect(10, 78, View.Bounds.Width - 140, 35);
//keyboard type for amount to be entered by user
totalAmount.KeyboardType = UIKeyboardType.DecimalPad;
totalAmount.BorderStyle = UITextBorderStyle.RoundedRect;
totalAmount.Placeholder = "Enter Sub Total";
//Text field to hold total amount user will pay
UITextField tipAmount = new UITextField();
tipAmount.Frame = new CoreGraphics.CGRect(10, 120, View.Bounds.Width - 140, 35);
//keyboard type for amount to be entered by user
tipAmount.KeyboardType = UIKeyboardType.DecimalPad;
tipAmount.BorderStyle = UITextBorderStyle.RoundedRect;
tipAmount.Placeholder = "Tip Percent";
//Button to calculate tip amount
UIButton calculateTipButton = new UIButton(UIButtonType.Custom);
calculateTipButton.Frame = new CoreGraphics.CGRect(10, 270, View.Bounds.Width / 2, 45);
calculateTipButton.BackgroundColor = UIColor.FromRGB(0, 0.5f, 0);
calculateTipButton.SetTitle("Calculate", UIControlState.Normal);
//Label to hold result of calculated Tip
UILabel incrementTipWithSlider = new UILabel()
{
Frame = new CoreGraphics.CGRect(10, 185, View.Bounds.Width / 2 + 10, 45),
TextColor = UIColor.Black,
TextAlignment = UITextAlignment.Center,
Font = UIFont.SystemFontOfSize(24),
Text = "Tip Value Slider",
};
//slider to get tip value
UISlider tipSlider = new UISlider();
tipSlider.Frame = new CoreGraphics.CGRect(10, 220, View.Bounds.Width / 2, 45);
tipSlider.MinValue = 0;
tipSlider.MaxValue = 100;
tipSlider.Value = 15;
//Label to hold result of calculated Tip
UILabel resultLabel = new UILabel()
{
Frame = new CoreGraphics.CGRect(10, 330, View.Bounds.Width / 2 + 10, 45),
TextColor = UIColor.Black,
TextAlignment = UITextAlignment.Center,
Font = UIFont.SystemFontOfSize(24),
Text = "Tip is $0.00",
};
//Label to hold total value plus tip amount
UILabel totalLabel = new UILabel()
{
Frame = new CoreGraphics.CGRect(10, 350, View.Bounds.Width / 2 + 10, 60),
TextColor = UIColor.Green,
TextAlignment = UITextAlignment.Center,
Font = UIFont.SystemFontOfSize(24),
Text = "Total amount Due:",
};
View.AddSubviews(totalAmount, tipAmount, calculateTipButton, incrementTipWithSlider, tipSlider, resultLabel, totalLabel);
//performing calculations
calculateTipButton.TouchUpInside += (s, e) =>
{
//hide keyboard when button is pressed
totalAmount.ResignFirstResponder();
tipAmount.ResignFirstResponder();
double valueSubTotal = 0;
double valueTipPercent = 0;
int tipGiven = 0;
//try parsing value from total amount text field to value var
double.TryParse(totalAmount.Text, out valueSubTotal);
//try parsing value from tip text field to valueTipPercent
double.TryParse(tipAmount.Text, out valueTipPercent);
tipGiven = int.Parse(valueTipPercent.ToString());
resultLabel.Text = $"Tip is {_tipCalModel.TipAmount(valueSubTotal, tipGiven).ToString("C")}";
totalLabel.Text = $"You Bill: {_tipCalModel.BillTotal(valueSubTotal, tipGiven).ToString("C")}";
};
//tracking changes in tip slider and performing an action
tipSlider.ValueChanged += (object sender, EventArgs e) =>
{
//hide keyboard when button is pressed
totalAmount.ResignFirstResponder();
//setting value from slider to tip amount textField
tipAmount.Text = (Math.Round(tipSlider.Value).ToString());
double valueSubTotal = 0;
int valueTipPercent = 0;
//try parsing value from total amount text field to value var
double.TryParse(totalAmount.Text, out valueSubTotal);
//try parsing value from tip text field to valueTipPercent
int.TryParse(tipAmount.Text, out valueTipPercent);
resultLabel.Text = $"Tip is {_tipCalModel.TipAmount(valueSubTotal, valueTipPercent).ToString("C")}";
totalLabel.Text = $"You Bill: {_tipCalModel.BillTotal(valueSubTotal, valueTipPercent).ToString("C")}";
};
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
var calculate = new ClsTipCalculator();
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button button = FindViewById <Button>(Resource.Id.myButton);
button.Click += delegate { button.Text = $"{count++} clicks!"; };
//Get subTotal from layout resource and attach to event
EditText _subTotal = FindViewById <EditText>(Resource.Id.subTotal);
TextView _total = FindViewById <TextView>(Resource.Id.total);
//seekbar for user generosity
SeekBar _seek = FindViewById <SeekBar>(Resource.Id.seekBar);
TextView _tipValue = FindViewById <TextView>(Resource.Id.tip);
_subTotal.TextChanged += (object sender, Android.Text.TextChangedEventArgs e) => {
if (string.IsNullOrEmpty(_subTotal.Text))
{
_seek.Enabled = false;
}
else
{
_seek.Enabled = true;
double _dSubTotal = double.Parse(_subTotal.Text.ToString());
var sub_tot = calculate.BillTotal(_dSubTotal, _generosity);
_total.Text = string.Format(sub_tot.ToString());
}
};
_seek.ProgressChanged += (object sender, SeekBar.ProgressChangedEventArgs e) => {
if (e.FromUser)
{
_generosity = int.Parse(e.Progress.ToString());
_tipValue.Text = string.Format("{0}%", e.Progress);
double _dSubTotal = double.Parse(_subTotal.Text.ToString());
var sub_tot = calculate.BillTotal(_dSubTotal, _generosity);
_total.Text = string.Format(sub_tot.ToString());
}
};
//make return key to send or calculate tip
_subTotal.EditorAction += (sender, e) => {
if (e.ActionId == Android.Views.InputMethods.ImeAction.Done)
{
//enable seekbar if user enters value
if (string.IsNullOrEmpty(_subTotal.Text))
{
_seek.Enabled = false;
}
else
{
_seek.Enabled = true;
double _dSubTotal = double.Parse(_subTotal.Text.ToString());
var sub_tot = calculate.BillTotal(_dSubTotal, _generosity);
_total.Text = string.Format(sub_tot.ToString());
}
}
else
{
e.Handled = false;
}
};
_subTotal.FocusChange += (object sender, Android.Views.View.FocusChangeEventArgs e) => {
Android.Views.InputMethods.InputMethodManager imm = (Android.Views.InputMethods.InputMethodManager)Application.Context.GetSystemService(InputMethodService);
imm.HideSoftInputFromWindow(_subTotal.WindowToken, 0);
};
}