大家好。我正在使用 Shoes 为 Ruby 项目制作 GUI。
我有一个名为 Manager 的类(如在内存管理器中),它从文件中加载“进程列表”,将其拆分并在执行某个执行调用时将内容分配给内存中的不同“页面”。不过,我真的不认为这部分很重要。这一切都可以作为终端应用程序正常工作。
然而,鞋子只是让我感到困惑。这是我到目前为止所得到的:
Shoes.app(:title => "Paging Simulator", :width => 800, :height => 450) do
@manager = Manager.new
stack(:width => 200) do
@exec_list = stack {
title "Execution Queue", :size => 14
@exec_lines = para "click button to load", :size => 9
@file_button = button "Load Process List"
@file_button.click {
filename = ask_open_file
# @manager.set_exec_list filename
# alert "this makes no sense"
@exec_lines.text = @manager.exec_list.join "\n"
# exec_lines.text = File.read filename
}
}
end
end
当我运行这个时会发生什么:
程序视图按预期加载。我得到一个标题,一个写着“单击按钮......”的段落和一个按钮。我单击按钮并选择文件。但这就是事情变得奇怪的地方。
如果我运行最后一条注释行exec_lines.text = File.read filename
,它会按照我的意愿运行,但我的经理没有得到它需要的任何信息。
如果我运行该@manager.set_exec_list filename
行,则该块中该行的任何内容都不会alert
运行,包括,或我尝试放入其中的任何其他代码。
但是,如果我如上所示运行,我会得到我期望的输出,但我无法从我选择的文件中设置我的数据。
我试图从鞋子规则页面解决这个问题,但这似乎不是他们解决的问题,我想我理解他们的“它改变/不改变自我”,但这很令人困惑,我不要认为它与这个问题完全相关。
有谁知道如何让它工作?我有点忙于这个项目的关键时间,我似乎无法让任何其他 Ruby GUI 工具包运行,所以我认为我非常坚持使用 Shoes。
谢谢。
更新
当我调用 时,我尝试在代码上运行 ruby-debug @manager.set_exec_list filename
,并且单步执行它表明该调用已完成,但代码实际上从未(据我所知)跳转到该方法,并且行为像它是块中的最后一行代码。我需要在Shoes.app
块中包含这些类吗?
更新不。那没有什么不同。
更新完整源代码如下:
#!/usr/bin/env shoes
require 'rubygems'
require 'ruby-debug'
class MemSegment
attr_accessor :filled, :pid, :seg, :seg_id
def initialize(filled=false, pid=nil, seg=nil, seg_id=0)
@filled = filled
@pid = pid.to_i
@seg = seg.to_s
@seg_id = seg_id.to_i
self
end
def fill(pid, seg, seg_id)
@filled = true; @pid = pid; @seg = seg; @seg_id = seg_id;
self
end
def clear
self.filled = false; self.pid = nil; self.seg = nil;
self
end
def filled?
@filled
end
def to_s
filled? ? "#{seg} #{seg_id} for pid #{pid}" : "Free"
end
end
class SimProc
include Enumerable
attr_accessor :pid, :code, :data
def initialize(pid, code, data)
@pid = pid.to_i
@code = code.to_i
@data = data.to_i
end
def each
yield :code, code
yield :data, data
end
def to_s
"[SimProc :pid => #{pid}, :code => #{code}, :data => #{data}]"
end
def to_a
[@pid, @code, @data]
end
end
class Manager
attr_reader :segments, :processes, :exec_list, :exec_object
def initialize
@exec_list = [[1, 2], [3, 4], [5, 6]]
@processes = {}
@segments = Array.new(8) { MemSegment.new }
end
def print_activity
@segments.each_with_index {|s, index| puts "Seg #{index} => #{s}" }
@processes.each_value {|s| puts s }
end
def load_process(pcb, exec_index)
if pcb.size == 3
p = SimProc.new(*pcb)
bad_load = false
@processes.store p.pid, p
@processes[p.pid].each do |proc_seg, bsize|
(bsize / 512.0).ceil.times do |seg_id|
@segments.each_with_index do |s, index|
if !s.filled
#find the first empty memory segment
s.fill p.pid, proc_seg, seg_id
break
# if all slots are filled and we couldn't place a proc block
elsif index == @segments.size - 1
bad_load = true
puts "Cannot find a place for #{proc_seg} segment of size #{bsize}. Requeueing..."
break;
end
end
break if bad_load
end
end
# recover pages and queue the process for later
if bad_load
@segments.each_with_index do |seg, seg_index|
# clear any segments that didn't get loaded properly
if seg.pid == p.pid
seg.clear
puts "Seg #{seg_index} => segment cleared: #{seg}"
end
end
# reinsert this process after the next in the execution list
# it will attempt to load and run after the next process is performed
@exec_list.insert(exec_index + 2, p.to_a)
end
print_activity
elsif pcb.size == 2 and pcb[1] == -1
# a process is exiting
puts "removing pid #{pcb[0]}"
@segments.each { |s| s.clear if s.pid == pcb[0] }
@processes.delete pcb[0]
print_activity
end
end
def set_exec_list(filename)
file = File.open filename
file.each { |pcb| @exec_list << pcb.split.map(&:to_i) } unless file.nil?
filename
end
def main
exseq = File.open('exseq2.txt')
set_exec_list exseq
# this is the object that will be used to run each process with .next
@exec_object = @exec_list.each_with_index
# @exec_list.each_with_index { |pcb, exec_index| load_process(pcb, exec_index) }
(@exec_list.size + 1).times do
load_process(*@exec_object.next)
end
end
end
=begin
manager = Manager.new
manager.main
=end
#=begin
Shoes.app(:title => "Paging Simulator", :width => 800, :height => 450) do
@manager = Manager.new
stack(:width => 200) do
@exec_list = stack {
title "Execution Queue", :size => 14
@exec_lines = para "click button to load", :size => 9
@file_button = button "Load Process List"
debugger
@file_button.click {
filename = ask_open_file
@manager.set_exec_list filename
# alert "this makes no sense"
# @exec_lines.text = @manager.exec_list
# @exec_lines.text = File.read filename
@exec_lines.text = @manager.exec_list.join "\n"
}
}
end
end
#=end