gui_geometry

GuiGeo

There are a few good geometry gems already available for Ruby (ruby-geometry and geometry), but I need one which is focused on the needs of creating 2D graphical user interfaces.

Installation

Add this line to your application's Gemfile:

gem 'gui_geometry'

And then execute:

$ bundle

Or install it yourself as:

$ gem install gui_geometry

Usage

Points are represented by X and Y coordinates:

Rectangles consist of two point objects. One specifies the location of the rectangle - it's top-left corner. The other specifies its size in terms of width then height.

require "gui_geometry"
include GuiGeo

# create point x == y == 0
point
# => point(0,0)

# create a point x=3, y=4
my_point = point(3,4)
# => point(3,4)

[my_point.x, my_point.y]
# => [3, 4]

# create a rectangle - x, y, w, h form
rect(4,5,100,80)
# => rect(4,5,100,80)

# create rectangle - location, size form
my_rect = rect point(4,5), point(100,80)
# => rect(4,5,100,80)

# create rectangle - size form (location defaults to 0,0
rect point(30,50)
# => rect(0,0,30,50)

# get loc and size:
[my_rect.loc, my_rect.size]
# => [point(4,5), point(100,80)]

# get x, y, width and height
[my_rect.x, my_rect.y, my_rect.w, my_rect.h]
# => [4, 5, 100, 80]

# get the 4 corners:
[my_rect.tl, my_rect.tr, my_rect.bl, my_rect.br]
# => [point(4,5), point(104,5), point(4,85), point(104,85)]

To get access to min, max, bound, and minmax:

include GuiGeo::Tools

min(4,5)
# => 4

max(4,5)
# => 5

minmax(4,5)
# => [4,5]

bound(5,4,10)
# => 5

Contributing

• Fork it
• Create your feature branch (git checkout -b my-new-feature)
• Commit your changes (git commit -am 'Add some feature')
• Push to the branch (git push origin my-new-feature)
• Create new Pull Request