# Portable calculator UI
module calculator is
-app_name "app.nit Calc."
- app_version(0, 1, git_revision)
+ app_name "app.nit Calc"
+ app_version(0, 2, git_revision)
app_namespace "org.nitlanguage.calculator"
# Lock in portrait mode
if debug then print "App::on_create"
# Create the main window
- window = new CalculatorWindow
+ push_window new CalculatorWindow
super
end
end
private var context = new CalculatorContext
# Main window layout
- private var layout = new VerticalLayout(parent=self)
+ var layout = new VerticalLayout(parent=self)
# Main display, at the top of the screen
private var display = new TextInput(parent=layout)
# Maps operators as `String` to their `Button`
- private var buttons = new HashMap[String, Button]
+ var buttons = new HashMap[String, Button]
init
do
# All the button labels, row by row
var rows = [["7", "8", "9", "+"],
["4", "5", "6", "-"],
- ["1", "2", "3", "*"],
- ["0", ".", "C", "/"],
+ ["1", "2", "3", "×"],
+ ["0", ".", "C", "÷"],
["="]]
for row in rows do
for op in row do
var but = new Button(parent=row_layout, text=op)
- but.observers.add self
buttons[op] = but
end
end
else if op.is_numeric then
var n = op.to_i
context.push_digit n
- else
+ else if op != null then
buttons["."].enabled = true
- context.push_op op.chars.first
+ context.push_op op
end
display.text = context.display_text