Glimmer DSL for SWT, which made it to the Top 8 Ruby Framework Projects on LibHunt for Feb 2021, recently added support for Custom Shapes, which are reusable graphical constructs akin of Custom Widgets (reusable widget constructs). Glimmer DSL for SWT just got its first official custom shape gems: glimmer-cp-bevel, providing the bevel keyword, and glimmer-cp-stickfigure, providing the stick_figure keyword. They are covered below.
Bevel
This represents a bevel square custom shape that can have various colors and sizes, and you only need to set its base color for it to figure out the rest. It is customizable via its API.
Currently used in Glimmer Tetris.
Glimmer GUI DSL Code Example:
# From: https://github.com/AndyObtiva/glimmer-cp-bevel#example
require 'glimmer-cp-bevel'
include Glimmer
shell {
text 'Glimmer Tetris Icon'
label {
text 'Check out the application icon!'
font height: 20
}
icon_block_size = 64
icon_bevel_size = icon_block_size.to_f / 25.to_f
icon_bevel_pixel_size = 0.16*icon_block_size.to_f
icon_size = 8
icon_pixel_size = icon_block_size * icon_size
image(icon_pixel_size, icon_pixel_size) {
icon_size.times { |row|
icon_size.times { |column|
colored = row >= 1 && column.between?(1, 6)
color = colored ? color(([:white] + [:cyan, :blue, :dark_yellow, :yellow, :green, :magenta, :red]).sample) : color(:white)
x = column * icon_block_size
y = row * icon_block_size
bevel(x: x, y: y, base_color: color, size: icon_block_size)
}
}
}
}.open
Tetris icon image produced:
Stick Figure
This represents a stick figure custom shape that can have colors and sizes, and you only need to set its base size for it to figure out the rest for the stick figure head, torso, arms, and legs. It is customizable via its API.
Currently used in the upcoming DCR project
Glimmer GUI DSL code for Hello, Stick Figure! Sample:
# From: https://github.com/AndyObtiva/glimmer-cp-stickfigure/blob/master/samples/stick_figure/hello_stick_figure.rb
require_relative '../../lib/glimmer-cp-stickfigure' # Use `require 'glimmer-cp-stickfigure'` if gem is installed
class HelloStickFigure
include Glimmer::UI::CustomShell
WIDTH = 220
HEIGHT = 235
body {
shell {
text 'Hello, Stick Figure!'
minimum_size WIDTH, HEIGHT
@canvas = canvas {
background :white
15.times { |n|
x_location = (rand*WIDTH/2).to_i%WIDTH + (rand*15).to_i
y_location = (rand*HEIGHT/2).to_i%HEIGHT + (rand*15).to_i
foreground_color = rgb(rand*255, rand*255, rand*255)
stick_figure(location_x: x_location, location_y: y_location, size: 35+n*2) {
foreground foreground_color
}
}
on_mouse_down { |mouse_event|
@drag_detected = false
@canvas.cursor = :hand
# select shape at location
@selected_shape = @canvas.shape_at_location(mouse_event.x, mouse_event.y)
# select shape parent if it is a nested shape like an arm or leg
@selected_shape = @selected_shape.parent_shapes.last if @selected_shape.parent_shapes.any?
}
on_drag_detected { |drag_detect_event|
@drag_detected = true
@drag_current_x = drag_detect_event.x
@drag_current_y = drag_detect_event.y
}
on_mouse_move { |mouse_event|
if @drag_detected
@selected_shape&.move_by(mouse_event.x - @drag_current_x, mouse_event.y - @drag_current_y)
@drag_current_x = mouse_event.x
@drag_current_y = mouse_event.y
end
}
on_mouse_up { |mouse_event|
@canvas.cursor = :arrow
@drag_detected = false
@selected_shape = nil
}
}
}
}
end
HelloStickFigure.launch
Hello, Stick Figure!
Happy Glimmering!
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