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#!/usr/bin/env ruby
#
# This sample code is a port of clutter/examples/easing-mode.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"
duration = 1
parser = OptionParser.new
parser.on("--duration=SECONDS", Integer,
"Duration of the animation",
"(#{duration})") do |_duration|
duration = _duration
end
parser.parse!
current_mode_index = 0
easing_modes = Clutter::AnimationMode.values.reject do |mode|
mode == Clutter::AnimationMode::CUSTOM_MODE
end
help_text = lambda do
format = <<-EOT.chomp
<b>Easing mode: %s (%d of %d)</b>
Left click to tween
Middle click to jump
Right click to change the easing mode
EOT
current_mode = easing_modes[current_mode_index]
format % [current_mode.nick, current_mode_index, easing_modes.size]
end
stage = Clutter::Stage.new
stage.title = "Easing Modes"
stage.background_color = Clutter::Color.new(:sky_blue_light)
stage.signal_connect("destroy") do
Clutter.main_quit
end
main_stage = stage
stage_width, stage_height = stage.size
bouncer_width = 50
bouncer_height = 50
canvas = Clutter::Canvas.new
canvas.signal_connect("draw") do |_canvas, cairo_context, width, height|
cairo_context.operator = :clear
cairo_context.paint
cairo_context.operator = :over
radius = [width, height].max
cairo_context.arc(radius / 2, radius / 2, radius / 2, 0.0, 2.0 * Math::PI)
bouncer_color = Clutter::Color.new(:scarlet_red_dark)
pattern = Cairo::RadialPattern.new(radius / 2, radius / 2, 0,
radius, radius, radius)
pattern.add_color_stop_rgba(0,
bouncer_color.red / 255.0,
bouncer_color.green / 255.0,
bouncer_color.blue / 255.0,
bouncer_color.alpha / 255.0)
pattern.add_color_stop_rgba(0.85,
bouncer_color.red / 255.0,
bouncer_color.green / 255.0,
bouncer_color.blue / 255.0,
0.25);
cairo_context.set_source(pattern)
cairo_context.fill
Clutter::Event::STOP
end
canvas.set_size(bouncer_width, bouncer_height)
rectangle = Clutter::Actor.new
rectangle.name = "bouncer"
rectangle.set_size(bouncer_width, bouncer_height)
rectangle.set_pivot_point(0.5, 0.5)
rectangle.set_translation(bouncer_width / -2.0, bouncer_height / -2.0, 0.0)
rectangle.reactive = true
rectangle.content = canvas
stage.add_child(rectangle)
rectangle.set_position(stage_width / 2, stage_height / 2)
label = Clutter::Text.new
stage.add_child(label)
label.markup = help_text.call
label.line_alignment = :right
label.add_constraint(Clutter::AlignConstraint.new(stage, :x_axis, 0.95))
label.add_constraint(Clutter::AlignConstraint.new(stage, :y_axis, 0.95))
easing_mode_label = label
stage.signal_connect("button-press-event") do |actor, event|
case event.button
when Clutter::BUTTON_SECONDARY
current_mode_index = (current_mode_index + 1) % easing_modes.size
label.markup = help_text.call
when Clutter::BUTTON_MIDDLE
rectangle.set_position(event.x, event.y)
when Clutter::BUTTON_PRIMARY
current_mode = easing_modes[current_mode_index]
rectangle.save_easing_state do
rectangle.easing_mode = current_mode
rectangle.easing_duration = duration * 1000
rectangle.set_position(event.x, event.y)
end
end
Clutter::Event::STOP
end
stage.show
Clutter.main
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