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#! /usr/bin/env lua
-- vim:sw=4:sts=4
require 'clutter'
message='Hello, Clutter!'
function on_button_press_event(actor, event, self)
local e = event.button -- in python event, in lua event.button
print(string.format("mouse button %d pressed at (%d, %d)", e.button,
e.x, e.y))
end
function quit(...)
clutter.main_quit()
end
---
-- Set up the stage, a label and a blinking cursor.
--
function main()
local stage, c, label, lw, lh, lx, ly, cursor, cx, cy
local closure, behaviour, alpha
clutter.init(0, nil)
stage = clutter.stage_get_default()
stage:set_size(800, 600)
c = clutter.new "Color"
clutter.color_parse("DarkSlateGrey", c)
stage:set_color(c)
stage:set_title"Clutter Hello Demo"
stage:connect('key-press-event', quit, stage)
stage:connect('button-press-event', on_button_press_event, stage)
c = clutter.new "Color"
c:from_pixel(0xffccccdd)
label = clutter.label_new_full("Mono 32", message, c)
-- demonstrate how to set a property
label:set_property("scale-x", 0.8)
assert(math.abs(label:get"scale-x" - 0.8) < 0.0001)
lw, lh = label:get_size(0, 0) -- have to pass 2 args
lx = stage:get_width() - lw - 50
ly = stage:get_height() - lh
label:set_position(lx, ly)
stage:add_actor(label)
-- create a rectangle that looks like a cursor
cursor = clutter.rectangle_new_with_color(c)
cursor:set_size(20, lh)
cx =stage:get_width() - 50
cy =stage:get_height() - lh
cursor:set_position(cx, cy)
stage:add_actor(cursor)
-- add a timeline, alpha, and behaviour to let the cursor blink
timeline = clutter.timeline_new(20, 30)
timeline:set_loop(true)
closure = gnome.closure(clutter.ramp_func)
alpha = clutter.alpha_new_full(timeline, closure, nil, nil)
alpha._closure = closure
behaviour = clutter.behaviour_opacity_new(alpha, 0xdd, 0)
behaviour:apply(cursor)
stage:show_all()
timeline:start()
clutter.main()
end
main()
-- some things remain in the registry...
-- collectgarbage"collect"
-- gnome.dump_memory()
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