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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
4

1 回答 1

3

所以,有几点:

#1,我没有 的实现Manager,所以我不能告诉你它为什么会中断。您是否尝试检查鞋子控制台是否有任何错误?点击 control-/ 将其显示出来。如果“在它到达那条线之后没有任何东西运行”,那可能就是问题所在。

#2,这对我有用,只要你改exec_lines@exec_lines最后一行。这是我尝试过的:

class Manager;end
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
        #alert "this makes no sense"
        @exec_lines.text = File.read filename
      }
    }
  end
end

希望有帮助!

于 2011-04-20T23:42:23.010 回答