samples/hello/hello_canvas_animation.rb
# 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'
require 'bigdecimal'
class HelloCanvasAnimation
include Glimmer::UI::CustomShell
attr_accessor :animation_every, :animation_fps, :animation_frame_count, :animation_duration_limit, :animation_started, :animation_finished
before_body do
@animation_every = 0.050 # seconds
@animation_fps = 0
@animation_frame_count = 100
@animation_duration_limit = 0 # seconds
@animation_started = true
@animation_finished = false
end
body {
shell {
grid_layout(2, true)
text 'Hello, Canvas Animation!'
# row 1
button {
layout_data(:fill, :center, true, false)
text <= [self, :animation_started, on_read: ->(value) { value ? 'Stop' : 'Resume' }]
enabled <= [self, :animation_finished, on_read: :!]
on_widget_selected do
if @animation.started?
@animation.stop
else
@animation.start
end
end
}
button {
layout_data(:fill, :center, true, false)
text 'Restart'
on_widget_selected do
@animation.restart
end
}
# row 2
label {
text 'every'
}
label {
text 'frames per second'
}
# row 3
spinner {
layout_data(:fill, :center, true, false)
digits 3
minimum 0
maximum 100
selection <=> [self, :animation_every, on_read: ->(v) {(BigDecimal(v.to_s)*1000).to_f}, on_write: ->(v) {(BigDecimal(v.to_s)/1000).to_f}]
}
spinner {
layout_data(:fill, :center, true, false)
minimum 0
maximum 100
selection <=> [self, :animation_fps]
}
# row 4
label {
text 'frame count (0=unlimited)'
}
label {
text 'duration limit (0=unlimited)'
}
# row 5
spinner {
layout_data(:fill, :center, true, false)
minimum 0
maximum 100
selection <=> [self, :animation_frame_count]
}
spinner {
layout_data(:fill, :center, true, false)
minimum 0
maximum 10
selection <=> [self, :animation_duration_limit]
}
canvas {
layout_data(:fill, :fill, true, true) {
horizontal_span 2
width_hint 320
height_hint 320
}
@animation = animation {
every <= [self, :animation_every]
fps <= [self, :animation_fps]
frame_count <= [self, :animation_frame_count]
duration_limit <= [self, :animation_duration_limit]
started <=> [self, :animation_started]
finished <=> [self, :animation_finished]
frame do |index|
background rgb(index%100, index%100 + 100, index%55 + 200)
oval(index*3%300, index*3%300, 20, 20) {
background :yellow
}
end
}
}
}
}
def animation_every=(value)
@animation_every = value
self.animation_fps = 0 if @animation_every.to_f > 0
end
def animation_fps=(value)
@animation_fps = value
self.animation_every = 0 if @animation_fps.to_f > 0
end
end
HelloCanvasAnimation.launch