public void GetResult()
{
try
{
if (expressionBuilder.Complete())
{
var postfixExpression = InfixToPostfixConverter.Convert(expressionBuilder.Expression);
var result = PostfixCalculator.Calculate(postfixExpression);
expressionBuilder.Clear();
expressionBuilder.AssignCurrentNumberToResult(result);
}
}
catch (DivideByZeroException)
{
expressionBuilder.Clear();
currentTextBox.Text = "Division by zero!";
}
}
public CalcView ()
{
Grid calcGrid = new Grid {
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
RowDefinitions = {
new RowDefinition { Height = new GridLength (2, GridUnitType.Star) },
new RowDefinition { Height = new GridLength (1, GridUnitType.Star) },
new RowDefinition { Height = new GridLength (1, GridUnitType.Star) },
new RowDefinition { Height = new GridLength (1, GridUnitType.Star) },
new RowDefinition { Height = new GridLength (1, GridUnitType.Star) },
new RowDefinition { Height = new GridLength (1, GridUnitType.Star) },
},
ColumnDefinitions = {
new ColumnDefinition { Width = new GridLength (1, GridUnitType.Star) },
new ColumnDefinition { Width = new GridLength (1, GridUnitType.Star) },
new ColumnDefinition { Width = new GridLength (1, GridUnitType.Star) },
new ColumnDefinition { Width = new GridLength (1, GridUnitType.Star) },
},
BackgroundColor = Color.White,
RowSpacing = 2,
ColumnSpacing = 2,
};
Frame frame = new Frame {
Content = calcGrid,
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
Padding = new Thickness(5),
BackgroundColor = Color.White
};
Content = frame;
Padding = new Thickness (5, Device.OnPlatform (20, 0, 0), 5, 5);
Label viewLabel = new Label {
Text = "",
FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
HorizontalOptions = LayoutOptions.FillAndExpand,
BackgroundColor = Color.FromRgb(0.99, 0.99, 0.99),
TextColor = Color.Black
};
Button buttonAC = new Button {
Text = "AC",
FontSize = Device.GetNamedSize(NamedSize.Medium, typeof(Button)),
BackgroundColor = Color.FromHex("BA0030"),
TextColor = Color.White,
FontAttributes = FontAttributes.Bold,
// BorderRadius = 1,
// BorderWidth = 1,
};
NumberButton button0 = new NumberButton ("0", viewLabel);
NumberButton button1 = new NumberButton ("1", viewLabel);
NumberButton button2 = new NumberButton ("2", viewLabel);
NumberButton button3 = new NumberButton ("3", viewLabel);
NumberButton button4 = new NumberButton ("4", viewLabel);
NumberButton button5 = new NumberButton ("5", viewLabel);
NumberButton button6 = new NumberButton ("6", viewLabel);
NumberButton button7 = new NumberButton ("7", viewLabel);
NumberButton button8 = new NumberButton ("8", viewLabel);
NumberButton button9 = new NumberButton ("9", viewLabel);
NumberButton buttonDot = new NumberButton (".", viewLabel);
NumberButton buttonParen1 = new NumberButton ("(", viewLabel);
NumberButton buttonParen2 = new NumberButton (")", viewLabel);
OperatorButton buttonPlus = new OperatorButton ("+", viewLabel);
OperatorButton buttonMinus = new OperatorButton ("-", viewLabel);
OperatorButton buttonMult = new OperatorButton ("x", viewLabel);
OperatorButton buttonDiv = new OperatorButton ("/", viewLabel);
OperatorButton buttonEq = new OperatorButton ("=", viewLabel);
buttonEq.Clicked += (sender, e) => {
string expr = viewLabel.Text;
InfixConverter converter = new InfixConverter(expr);
PostfixCalculator calc = new PostfixCalculator(converter.postfixString);
// viewLabel.Text = calc.answer;
viewLabel.Text += "\n" + calc.answer;
};
buttonAC.Clicked += (sender, e) => {
viewLabel.Text = "";
};
// numbers
calcGrid.Children.Add (button9, 2, 2);
calcGrid.Children.Add (button8, 1, 2);
calcGrid.Children.Add (button7, 0, 2);
calcGrid.Children.Add (button6, 2, 3);
calcGrid.Children.Add (button5, 1, 3);
calcGrid.Children.Add (button4, 0, 3);
calcGrid.Children.Add (button3, 2, 4);
calcGrid.Children.Add (button2, 1, 4);
calcGrid.Children.Add (button1, 0, 4);
calcGrid.Children.Add (button0, 0, 2, 5, 6);
calcGrid.Children.Add (buttonDot, 2, 5);
// operators
calcGrid.Children.Add (buttonPlus, 3, 1);
calcGrid.Children.Add (buttonMinus, 3, 2);
calcGrid.Children.Add (buttonMult, 3, 3);
calcGrid.Children.Add (buttonDiv, 3, 4);
calcGrid.Children.Add (buttonEq, 3, 5);
// misc
calcGrid.Children.Add (buttonAC, 0, 1);
calcGrid.Children.Add (buttonParen1, 1, 1);
calcGrid.Children.Add (buttonParen2, 2, 1);
calcGrid.Children.Add (viewLabel, 0, 4, 0, 1);
}
