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Contents
module Vedeu
# Clears all the character data for the area defined by an interface. This
# class is called every time an interface is rendered to prepare the area
# for new data.
#
# @api private
class Clear
# Blanks the area defined by the interface.
#
# @param interface [Interface]
# @return [String]
def self.call(interface)
new(interface).clear
end
# Returns a new instance of Clear.
#
# @param interface [Interface]
# @return [Clear]
def initialize(interface)
@interface = interface
end
# For each visible line of the interface, set the foreground and background
# colours to those specified when the interface was defined, then starting
# write space characters over the area which the interface occupies.
#
# @return [String]
def clear
Vedeu.log("Clearing view: '#{interface.name}'")
rows.inject([colours]) do |line, index|
line << interface.origin(index) { ' ' * interface.width }
end.join
end
private
attr_reader :interface
# @return [String]
def colours
interface.colour.to_s
end
# @return [Enumerator]
def rows
interface.height.times
end
end # Clear
end # Vedeu
Version data entries
5 entries across 5 versions & 1 rubygems