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#!/usr/bin/env ruby
#
# This sample code is a port of clutter-gtk/examples/gtk-clutter-test-actor.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 "clutter-gtk"
MAX_N_WIDGETS = 4
WINDOW_WIDTH = 400
WINDOW_HEIGHT = 400
RADIUS = 80
do_rotate_p = true
window = Gtk::Window.new
window.signal_connect("destroy") do
Gtk.main_quit
end
vbox = Gtk::Box.new(:vertical, 6)
window.add(vbox)
clutter = ClutterGtk::Embed.new
clutter.set_size_request(WINDOW_WIDTH, WINDOW_HEIGHT)
vbox.pack_start(clutter, :expand => true, :fill => true, :padding => 0)
stage = clutter.stage
button = Gtk::Button.new(:stock_id => Gtk::Stock::QUIT)
button.signal_connect("clicked") do |_button|
window.destroy
end
vbox.pack_end(button, :expand => false, :fill => false, :padding => 0)
stage.background_color = Clutter::Color.new(0x61, 0x64, 0x8c, 0xff)
widgets = []
# create a new group to hold multiple actors in a group
group = Clutter::Actor.new
create_gtk_actor = lambda do
gtk_actor = ClutterGtk::Actor.new
bin = gtk_actor.widget
vbox = Gtk::Box.new(:vertical, 6)
bin.add(vbox)
button = Gtk::Button.new(:label => "A Button")
vbox.pack_start(button, :expand => false, :fill => false, :padding => 0)
button.signal_connect("clicked") do |_button|
puts("button clicked")
label = Gtk::Label.new("A new label")
label.show
vbox.pack_start(label, :expand => false, :fill => false, :padding => 0)
end
button = Gtk::CheckButton.new("Another button")
vbox.pack_start(button, :expand => false, :fill => false, :padding => 0)
entry = Gtk::Entry.new
vbox.pack_start(entry, :expand => false, :fill => false, :padding => 0)
bin.show_all
gtk_actor
end
add_clutter_actor = lambda do |actor, container, i|
container.add_child(actor)
# Place around a circle
w = widgets.first.width
h = widgets.first.height
x = WINDOW_WIDTH / 2 +
RADIUS * Math.cos(i * 2 * Math::PI / (MAX_N_WIDGETS)) - w / 2
y = WINDOW_HEIGHT / 2 +
RADIUS * Math.sin(i * 2 * Math::PI / (MAX_N_WIDGETS)) - h / 2
actor.set_position(x, y)
end
MAX_N_WIDGETS.times do |i|
widget = create_gtk_actor.call
widgets[i] = widget
add_clutter_actor.call(widget, group, i)
end
# Add the group to the stage and center it
stage.add_child(group)
group.add_constraint(Clutter::AlignConstraint.new(stage, :x_axis, 0.5))
group.add_constraint(Clutter::AlignConstraint.new(stage, :y_axis, 0.5))
window.show_all
# Create a timeline to manage animation
timeline = Clutter::Timeline.new(6000)
timeline.repeat_count = -1
# fire a callback for frame change
timeline.signal_connect("new-frame") do |_timeline, m_secs|
rotation = _timeline.progress * 360.0
if do_rotate_p
# Rotate everything clockwise about stage center
group.set_rotation(:z_axis,
rotation,
WINDOW_WIDTH / 2,
WINDOW_HEIGHT / 2,
0)
widgets.each do |widget|
# rotate each widget around its center
w = widget.width
h = widget.height
widget.set_rotation(:z_axis,
-(2 * rotation),
w / 2,
h / 2,
0)
widget.opacity = 50 * Math.sin(2 * Math::PI * rotation / 360) + (255 - 50)
end
end
end
# and start it
timeline.start
GLib::Timeout.add_seconds(3) do
if MAX_N_WIDGETS == widgets.size
# Removing an item
group.remove_child(widgets.pop)
else
# Adding an item
widget = create_gtk_actor.call
widgets << widget
add_clutter_actor.call(widget, group, MAX_N_WIDGETS - 1)
end
keep_callback = true
keep_callback
end
Gtk.main
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