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hello_shape.rb
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hello_shape.rb
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# Copyright (c) 2007-2024 Andy Maleh
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
require 'glimmer-dsl-swt'
class HelloShape
include Glimmer::UI::CustomShell
body {
shell {
text 'Hello, Shape!'
minimum_size 200, 225
@canvas = canvas {
background :white
15.times { |n|
x_location = (rand*125).to_i%200 + (rand*15).to_i
y_location = (rand*125).to_i%200 + (rand*15).to_i
foreground_color = rgb(rand*255, rand*255, rand*255)
a_stick_figure = stick_figure(x_location, y_location, 35+n*2, 35+n*2) {
foreground foreground_color
drag_and_move true
# on mouse click, change color
on_mouse_up do
a_stick_figure.foreground = rgb(rand*255, rand*255, rand*255)
end
}
}
}
}
}
# method-based custom shape using `shape` keyword as a composite shape containing nested shapes
# See HelloCustomShape sample for a class-based custom shape alternative that enables extracting custom shape to a separate class/file
def stick_figure(x, y, width, height, &block)
head_width = width*0.2
head_height = height*0.2
trunk_height = height*0.4
extremity_length = height*0.4
shape(x + head_width/2.0 + extremity_length, y) {
# common attributes go here before nested shapes
block.call # invoking content block (e.g. used from the outside to set foreground)
# nested shapes go here
oval(0, 0, head_width, head_height)
line(head_width/2.0, head_height, head_width/2.0, head_height + trunk_height)
line(head_width/2.0, head_height + trunk_height, head_width/2.0 + extremity_length, head_height + trunk_height + extremity_length)
line(head_width/2.0, head_height + trunk_height, head_width/2.0 - extremity_length, head_height + trunk_height + extremity_length)
line(head_width/2.0, head_height*2, head_width/2.0 + extremity_length, head_height + trunk_height - extremity_length)
line(head_width/2.0, head_height*2, head_width/2.0 - extremity_length, head_height + trunk_height - extremity_length)
}
end
end
HelloShape.launch