访问类变量(的Qt::Action
秒的阵列)当我已经具有分割故障的问题,以及我一直在试图以削减下来到复制问题的最小代码例如:为什么我会出现分段错误(qtruby)?
#!/usr/bin/ruby
require 'Qt4'
require 'rufus/scheduler'
app = Qt::Application.new(ARGV)
class ManagerWidget < Qt::Widget
signals 'changed(int)'
def initialize
super(nil)
max_index = 2
next_index = 0
scheduler = Rufus::Scheduler.start_new
scheduler.every '10s' do
emit changed(next_index)
if next_index < max_index - 1
next_index += 1
else
next_index = 0
end
end
end
end
class Tray < Qt::Widget
def initialize
super(nil)
tray = Qt::SystemTrayIcon.new
manager_widget = ManagerWidget.new
menu = Qt::Menu.new
tray_icon = Qt::Icon.new("./icons/Gnome-Preferences-Desktop-Wallpaper-64.png")
actions = []
manager_widget.connect(SIGNAL('changed(int)')) do |i|
puts "changed #{i}"
actions[i].text = '...' if actions && actions[i]
end
2.times do |i|
sub_menu = Qt::Menu.new("#{i + 1}")
actions[i] = sub_menu.add_action('x')
menu.add_menu(sub_menu)
end
tray.icon = tray_icon
tray.context_menu = menu
tray.show
end
end
Tray.new
app.exec
上面的代码输出:
"sni-qt/12147" WARN 14:35:48.326 void StatusNotifierItemFactory::connectToSnw() Invalid interface to SNW_SERVICE
changed 0
changed 1
changed 0
changed 1
changed 0
changed 1
changed 0
changed 1
./min-code-example.rb:42: [BUG] Segmentation fault
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]
[... snipped due to character limits on posting ...]
[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html
Aborted (core dumped)
Failed (134)
这似乎是必要使用子菜单来触发这个问题 - 至少加入行动,托盘菜单本身运行相当长一段时间没有问题(我只要使用上面的代码获取错误,就将其保留10次以上)。
红宝石版本:ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]
Qt的版本:4.8.1
绑定版本:qtbindings (4.8.3.0)
Linux版本的:Ubuntu 12.04
另一个奇数行为是从puts
调用的输出有时会显示立即在控制台中,其他时候,只有当我将鼠标悬停在托盘图标上时才会打印。
我甚至不知道从哪里开始,因此需要对其进行跟踪,因此您所输入的任何内容都将非常感谢。
更新:我已经离开了这一段时间,因为我无法进一步。我试着重新开始,但我仍然遇到同样的问题。我深入研究了这个问题,并且由于它说'missing_method',我开始打印类以确保我确实在查看Qt :: Action(我是),然后根据actions[0].methods
。
.methods
输出:
[:setShortcut, :shortcut=, :qobject_cast, :inspect, :pretty_print, :className,
:class_name, :inherits, :findChildren, :find_children, :findChild, :find_child,
:connect, :method_missing, :const_missing, :dispose, :isDisposed, :disposed?,
:qVariantValue, :qVariantFromValue, :**, :+, :~, :[email protected], :-, :*, :/, :%, :>>,
:<<, :&, :^, :|, :<, :<=, :>, :>=, :==, :is_a?, :kind_of?, :methods,
:protected_methods, :public_methods, :singleton_methods, :qDebug, :qFatal,
:qWarning, :SIGNAL, :SLOT, :emit, :QT_TR_NOOP, :QT_TRANSLATE_NOOP, :nil?, :===,
:=~, :!~, :eql?, :hash, :<=>, :class, :singleton_class, :clone, :dup,
:initialize_dup, :initialize_clone, :taint, :tainted?, :untaint, :untrust,
:untrusted?, :trust, :freeze, :frozen?, :to_s, :private_methods,
:instance_variables, :instance_variable_get, :instance_variable_set,
:instance_variable_defined?, :instance_of?, :tap, :send, :public_send,
:respond_to?, :respond_to_missing?, :extend, :display, :method, :public_method,
:define_singleton_method, :object_id, :to_enum, :enum_for, :equal?, :!, :!=,
:instance_eval, :instance_exec, :__send__, :__id__, "blockSignals", "children",
"connect", "deleteLater", "disconnect", "dumpObjectInfo", "dumpObjectTree",
"dynamicPropertyNames", "event", "eventFilter", "inherits", "installEventFilter",
"widgetType?", "killTimer", "metaObject", "moveToThread", "objectName", "parent",
"property", "qt_metacall", "qt_metacast", "removeEventFilter", "objectName=",
"parent=", "setProperty", "setUserData", "signalsBlocked", "startTimer",
"thread", "userData", "actionGroup", "activate", "associatedGraphicsWidgets",
"associatedWidgets", "autoRepeat", "data", "font", "hover", "icon", "iconText",
"checkable?", "checked?", "enabled?", "iconVisibleInMenu?", "separator?",
"visible?", "menu", "menuRole", "parentWidget", "priority", "actionGroup=",
"autoRepeat=", "checkable=", "checked=", "data=", "disabled=", "enabled=",
"font=", "icon=", "iconText=", "iconVisibleInMenu=", "menu=", "menuRole=",
"priority=", "separator=", "shortcut=", "shortcutContext=", "shortcuts=",
"softKeyRole=", "statusTip=", "text=", "toolTip=", "visible=", "whatsThis=",
"shortcut", "shortcutContext", "shortcuts", "showStatusText", "softKeyRole",
"statusTip", "text", "toggle", "toolTip", "trigger", "whatsThis"]
在这种情况下,我试图做actions[0].enabled = true
当分段错误发生,这是在输出据我所知(从底部6号线,enabled=
)。我也试过setEnabled(true)
,set_enabled(true)
,几乎可以想到任何事情。
即使在动作对象上调用inspect
正在导致分段错误,尽管在最初将动作放在数组中的循环中这样做是很好的。我真的不明白哪里出了问题。
编辑:为了回应使用QTimer
的建议,我尝试了这个,我仍然遇到同样的问题。该代码是目前一个公平位比上面列出更复杂,所以我会在这里写一些简单的伪代码来说明流量:
def init_tray
actions = []
2.times do |i|
actions[i] = ... # init and add to systray, store reference in array
end
update = Proc.new do |i|
actions[i].setText('...') # update the text on one of the actions defined above
end
listener = ... # create a listener that can be called by Manager on certain events - will call the update Proc among other things.
manager = Manager.new(..., listener)
end
的呼叫Manager.new该对象并初始化end用状态改变调用监听器,这又调用update
Proc,它访问actions
数组。在这个阶段,这应该全都在同一个线程中,除了实际创建Qt::Action
之外,这些线都不依赖于QT。我已经删除了Rufus调度,并用QTimer
替换了它,但它只是远远不够,因此成为问题。
你确定你可以使用像这样的qtbindings吗? qtbindings是否线程安全?你知道Rufus创建了一个新的Ruby线程吗?我想,一旦你进入Qt世界,你需要使用Qt定时器而不是Ruby定时器。即为了触发'emit',你可能需要使用'QTimer'而不是Rufus。 – Casper
@Casper,我不知道,我不知道Rufus创建了一个新的Ruby线程,不。即使它不是线程安全的,它仍然是一种非常奇怪的失败方式(仍然只有一个线程可以随时访问它,并且参考看起来很好,因为我可以打印出关于它的一些信息)。我仍然只是想学习QT,并没有意识到我可以使用QTimer,我会给它一个去,谢谢。 – Thor84no
@Casper这毕竟看起来不是问题,Rufus调度器根本没有运行失败的代码(因为它在初始化过程中失败了,应该仍然是主线程)。我已经添加了一些关于它的详细信息,以帮助澄清这个问题。 – Thor84no