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# coding: utf-8
# Copyright 2019 DragonRuby LLC
# MIT License
# grid.rb has been released under MIT (*only this file*).
module GTK
class Grid
include Serialize
SCREEN_Y_DIRECTION = -1.0
attr_accessor :bottom, :left, :right, :top,
:rect, :origin_x, :origin_y, :center_x, :center_y,
:name, :ffi_draw
def initialize ffi_draw
@ffi_draw = ffi_draw
origin_bottom_left!
end
def transform_x x
@origin_x + x
end
def untransform_x x
x - @origin_x
end
def untransform_y y
@origin_y + y * SCREEN_Y_DIRECTION
end
def transform_y y
@origin_y + y * SCREEN_Y_DIRECTION
end
def origin_bottom_left!
return if @name == :bottom_left
@name = :bottom_left
@origin_x = 0.0
@origin_y = 720.0
@left = 0.0
@right = 1280.0
@top = 720.0
@bottom = 0.0
@center_x = 640.0
@center_y = 360.0
@rect = [@left, @bottom, 1280.0, 720.0].rect
@center = [@center_x, @center_y].point
@ffi_draw.set_gtk_grid @origin_x, @origin_y, SCREEN_Y_DIRECTION
end
def origin_center!
return if @name == :center
@name = :center
@origin_x = 640.0
@origin_y = 360.0
@left = -640.0
@right = 640.0
@top = 360.0
@bottom = -360.0
@center_x = 0.0
@center_y = 0.0
@rect = [@left, @bottom, 1280.0, 720.0].rect
@center = [@center_x, @center_y].point
@ffi_draw.set_gtk_grid @origin_x, @origin_y, SCREEN_Y_DIRECTION
end
def w
1280.0
end
def w_half
640.0
end
def h
720.0
end
def h_half
360.0
end
def center
@center
end
def bottom_right
[@right, @bottom].point
end
end
end
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