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#!/usr/bin/env ruby
#
# This sample code is a port of clutter/examples/flow-layout.c.
# It is licensed under the terms of the GNU Lesser General Public
# License, version 2.1 or (at your option) later.
#
# Copyright (C) 2013 Ruby-GNOME2 Project Team
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
require "optparse"
require "clutter"
random_size_p = false
n_rects = 20
vertical_p = false
homogeneous_p = false
x_spacing = 0
y_spacing = 0
fixed_size_p = false
parser = OptionParser.new
parser.on("--[no-]random-size",
"Randomly size the rectangles",
"(#{random_size_p})") do |boolean|
random_size_p = boolean
end
parser.on("--n-rects=N", Integer,
"Number of rectangles",
"(#{n_rects})") do |n|
n_rects = n
end
parser.on("--[no-]vertical",
"Set vertical orientation",
"(#{vertical_p})") do |boolean|
vertical_p = boolean
end
parser.on("--[no-]homogeneous",
"Whether the layout should be homogeneous",
"(#{homogeneous_p})") do |boolean|
homogeneous_p = boolean
end
parser.on("--x-spacing=PIXEL", Integer,
"Horizontal spacing between elements",
"(#{x_spacing})") do |pixel|
x_spacing = pixel
end
parser.on("--y-spacing=PIXEL", Integer,
"Vertical spacing between elements",
"(#{y_spacing})") do |pixel|
y_spacing = pixel
end
parser.on("--[no-]fixed-size",
"Fix the layout size",
"(#{fixed_size_p})") do |boolean|
fixed_size_p = boolean
end
parser.parse!
stage = Clutter::Stage.new
stage.background_color = Clutter::Color.new(:sky_blue_light)
stage.title = "Flow Layout"
stage.user_resizable = true
stage.signal_connect("destroy") do
Clutter.main_quit
end
layout = Clutter::FlowLayout.new(vertical_p ? :vertical : :horizontal)
layout.homogeneous = homogeneous_p
layout.column_spacing = x_spacing
layout.row_spacing = y_spacing
box = Clutter::Actor.new
box.layout_manager = layout
box.background_color = Clutter::Color.new(:aluminium_2)
stage.add_child(box)
unless fixed_size_p
box.add_constraint(Clutter::BindConstraint.new(stage, :size, 0.0))
end
box.set_position(0, 0)
box.name = "box"
n_rects.times do |i|
color = Clutter::Color.hls(360.0 / n_rects * i,
0.5,
0.8)
rect = Clutter::Actor.new
rect.background_color = color
if random_size_p
width = rand(50..100)
height = rand(50..100)
else
width = height = 50.0
end
rect.set_size(width, height)
rect.name = "rect%02d" % i
box.add_child(rect)
end
stage.show
Clutter.main
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