Class: Potty::Widgets::Button

Inherits:
Base
  • Object
show all
Defined in:
lib/potty/widgets/button.rb

Overview

Focusable push button. Space/Enter fires :press. Pass on_press: for a one-liner, or wire it with button.on(:press) { … }.

Instance Attribute Summary collapse

Attributes inherited from Base

#app, #focused, #parent, #rect

Instance Method Summary collapse

Methods inherited from Base

#activate, #blur, #deactivate, #focus, #handle_escape, #hide, #layout, #on_blur, #on_focus, #on_layout, #show, #theme, #tick, #visible=, #visible?

Methods included from Events

#emit, #listeners?, #off, #on

Constructor Details

#initialize(app, label: '', color: :normal, on_press: nil) ⇒ Button

Returns a new instance of Button.



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# File 'lib/potty/widgets/button.rb', line 13

def initialize(app, label: '', color: :normal, on_press: nil)
  super(app)
  @label = label
  @color = color
  on(:press, &on_press) if on_press
end

Instance Attribute Details

#color ⇒ Object

Returns the value of attribute color.



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# File 'lib/potty/widgets/button.rb', line 11

def color
  @color
end

#label ⇒ Object

Returns the value of attribute label.



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# File 'lib/potty/widgets/button.rb', line 11

def label
  @label
end

Instance Method Details

#can_focus? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/potty/widgets/button.rb', line 20

def can_focus?
  true
end

#handle_key(ch) ⇒ Object 



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# File 'lib/potty/widgets/button.rb', line 32

def handle_key(ch)
  case ch
  when Keys::SPACE, *Keys::ENTERS
    press
    true
  else
    false
  end
end

#preferred_height(_width) ⇒ Object 



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# File 'lib/potty/widgets/button.rb', line 24

def preferred_height(_width)
  1
end

#press ⇒ Object 



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# File 'lib/potty/widgets/button.rb', line 28

def press
  emit(:press, self)
end

#render(window) ⇒ Object 



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# File 'lib/potty/widgets/button.rb', line 42

def render(window)
  return unless @visible && @rect

  text = "[ #{@label} ]"[0, @rect.width]
  attr = @focused ? theme.attr(:selected, bold: true) : theme[@color]
  window.setpos(@rect.y, @rect.x)
  window.attron(attr) { window.addstr(text) }
end