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Ruby GTK 警告ウィンドウ
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require 'gtk2' | |
include Math | |
WIDTH = 1280 # 画面の幅 | |
HEIGHT = 800 # 画面の高さ | |
MAX = 30 # 表示するウィンドウの数 | |
# 使用する色 | |
COLOR_DICT = { | |
:yellow => Gdk::Color.new(65535, 65535, 0), | |
:black => Gdk::Color.new(0, 0, 0), | |
} | |
colormap = Gdk::Colormap.system | |
COLOR_DICT.each do |_, color| | |
colormap.alloc_color(color, false, true) | |
end | |
# 生成される警告ウィンドウ | |
class WarningWindow < Gtk::Window | |
def initialize | |
super(Gtk::Window::POPUP) | |
@width = 300 # ウィンドウの幅 | |
@height = 150 # ウィンドウの高さ | |
m = [WIDTH/2 - @width/2, HEIGHT/2 - @height/2] | |
s = [WIDTH/8, HEIGHT/8] | |
@x, @y = box_muller(m, s) | |
@x_adder = [-2, -1, 1, 2].sample | |
@y_adder = [-2, -1, 1, 2].sample | |
self.move(@x, @y) | |
self.set_size_request(@width, @height) | |
self.set_app_paintable(true) | |
self.set_title("WARNING!!") | |
self.realize | |
@drawable = self.window | |
@gc = Gdk::GC.new(@drawable) | |
@gc.set_line_attributes(20, Gdk::GC::LINE_SOLID, Gdk::GC::CAP_ROUND, Gdk::GC::JOIN_BEVEL) | |
# 画像を表示 | |
source = ["./msg_warning.png", "./msg_danger.png"].sample | |
@image = Gtk::Image.new(source) | |
self.add(@image) | |
# 縞模様用のカウンタ | |
@counters = (-1..5).map do |i| | |
->(init, max) do | |
n = init | |
-> { n == max - 1 ? n = -50 : n += 1 } | |
end[i*50, @width] | |
end | |
end | |
# 縞模様を流すアニメーション | |
def add_task | |
Gtk.timeout_add(20) do | |
@x += @x_adder | |
@y += @y_adder | |
@x_adder *= -1 if @x < 0 || @x > WIDTH - @width | |
@y_adder *= -1 if @y < 0 || @y > HEIGHT - @height | |
self.move(@x, @y) | |
clear | |
draw | |
end | |
end | |
# 黒い斜め線を描画 | |
def draw | |
@gc.set_foreground(COLOR_DICT[:black]) | |
@counters.each do |counter| | |
from = [counter[], 0] | |
to = [from[0] + 50 ,@height] | |
@drawable.draw_line(@gc, *from, *to) | |
end | |
end | |
# 背景を黄色で描画 | |
def clear | |
@gc.set_foreground(COLOR_DICT[:yellow]) | |
@drawable.draw_rectangle(@gc, true, 0, 0, @width, @height) | |
end | |
private | |
# ウィンドウの出現位置を散らすため | |
def box_muller(m = [0, 0], s = [1, 1]) | |
r1 = rand | |
r2 = rand | |
x = sqrt(-2 * log(r1)) * cos(2*PI * r2) | |
y = sqrt(-2 * log(r1)) * sin(2*PI * r2) | |
[s[0] * x + m[0], s[1] * y + m[1]] | |
end | |
end | |
wins = [] | |
Gtk.timeout_add(100) do | |
wins << WarningWindow.new | |
wins.last.show_all | |
# たまにどれか消える | |
if rand < 0.3 | |
win = wins.sample | |
win.destroy | |
wins.delete(win) | |
end | |
# MAXを越えたらこれ以上ウィンドウは増えない | |
if wins.size > MAX | |
sleep 1 | |
wins.each(&:add_task) | |
true | |
end.! | |
end | |
begin | |
Gtk.main | |
rescue Interrupt | |
Gtk.main_quit | |
end |
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