Method: MiniGL::Button#update

Defined in:
lib/minigl/forms.rb

#update ⇒ Object

Updates the button, checking the mouse movement and buttons to define the button state.



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# File 'lib/minigl/forms.rb', line 147

def update
  return unless @enabled and @visible

  mouse_over = Mouse.over? @x, @y, @w, @h
  mouse_press = Mouse.button_pressed? :left
  mouse_rel = Mouse.button_released? :left

  if @state == :up
    if mouse_over
      @img_index = 1
      @state = :over
    else
      @img_index = 0
    end
  elsif @state == :over
    if not mouse_over
      @img_index = 0
      @state = :up
    elsif mouse_press
      @img_index = 2
      @state = :down
    else
      @img_index = 1
    end
  elsif @state == :down
    if not mouse_over
      @img_index = 0
      @state = :down_out
    elsif mouse_rel
      @img_index = 1
      @state = :over
      click
    else
      @img_index = 2
    end
  else # :down_out
    if mouse_over
      @img_index = 2
      @state = :down
    elsif mouse_rel
      @img_index = 0
      @state = :up
    else
      @img_index = 0
    end
  end
end