Sha256: 5b9293faab03d5e88142ba768e4a8461439ce16a99b52869f62f69f867569f18
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Size: 1.44 KB
Versions: 43
Compression:
Stored size: 1.44 KB
Contents
def setup_rotate_zoom_effect_slide(slide)
class << slide
def rotate_zoom_effect
angle = 0
last_angle = 360
last_scale_x = 1
last_scale_y = 1
idle_id = nil
effected = false
add_around_draw_proc do |canvas, x, y, w, h, simulation, next_proc|
canvas.save_context do
if !simulation and !effected
angle = [angle + last_angle * 0.05, last_angle].min
ratio = angle / last_angle
scale_x = last_scale_x * ratio
scale_y = last_scale_y * ratio
translate(canvas, angle, scale_x, scale_y)
idle_id ||= Gtk.idle_add do
continue = (angle != last_angle and
canvas.current_slide == self)
unless continue
idle_id = nil
effected = true
end
canvas.activate("Redraw")
continue
end
end
next_proc.call(canvas, x, y, w, h, simulation)
end
end
end
private
def translate(canvas, angle, scale_x, scale_y)
center_x = canvas.width / 2
center_y = canvas.height / 2
canvas.translate_context(center_x, center_y)
canvas.rotate_context(angle)
canvas.translate_context(-center_x, -center_y)
canvas.scale_context(scale_x, scale_y)
end
end
end
match(Slide) do |slides|
slides.each do |slide|
setup_rotate_zoom_effect_slide(slide)
end
end
Version data entries
43 entries across 43 versions & 1 rubygems