QtRuby发出不起作用

Question

平台：

达尔文*-*s-MacBook-Pro.local 11.4.2达尔文内核版本11.4.2:清华8月23日16:25:48 PDT 2012；根:xnu-1699.32.7~1/ x86_64 _X86_64

Ruby：

Ruby2.0.0p0 (2013-02-24修订版39474) 64-darwin11.4.2

Qt：

qt:稳定4.8.4 (瓶装)，头部

码

require 'Qt'

class Foo < Qt::Object

    signals :my_signal #also tried 'my_signal()'
    slots 'my_slot()'

    def initialize(parent = nil)
        super(parent)

        puts "connecting signal and slot"
        Qt::Object.connect(self, SIGNAL('my_signal()'), self, SLOT('my_slot()'))
        # also tried => connect(self, SIGNAL('my_signal()'), self, SLOT('my_slot()'))

    end

    def emit_my_signal
        puts "sending signal"
        emit my_signal
    end

    def my_slot
        puts "received message from signal"
    end
end


o = Foo.new
o.emit_my_signal

输出

connecting signal and slot
sending signal

使用Qt.debug_level = Qt::DebugLevel::High的输出

Munged method names:
        QObject$
        QObject?
        QObject#
candidate list:
    QObject* QObject::QObject(QObject*)  (smoke: 0 index: 3804)
matching => smoke: 0 index: 3804
        QObject* (u) score: 2
        match => smoke: 0 index: 3804 score: 2 chosen: 3804
setCurrentMethod(smokeList index: 0, meth index: 3804)
connecting signal and slot
Searching for QObject#connect
Munged method names:
        connect#$#$
candidate list:
    static bool QObject::connect(const QObject*, const char*, const QObject*, const char*)  (smoke: 0 index: 3850)
matching => smoke: 0 index: 3850
        const QObject* (QObject) score: 3
        const char* (s) score: 1
        const QObject* (QObject) score: 3
        const char* (s) score: 1
        match => smoke: 0 index: 3850 score: 8 chosen: 3850
setCurrentMethod(smokeList index: 0, meth index: 3850)
sending signal

它似乎没有任何作用。我也尝试过重新安装qt和qtbinding，但问题仍然存在。我还试了一下PyQt，在同一台机器上安装了信号和插槽，它的工作原理就像一种魅力。

有人对此有什么想法吗？是红宝石的错误还是我做错了什么？

Answer 1

通常，需要启动Qt的事件循环，然后才能可靠地传递任何信号。我从你的密码里看不出来。更具体地说，我错过的是：

app = Qt::Application.new(ARGV)
app.exec

Answer 2

代码似乎是正确的。这个问题只表现在红宝石和qtbindings的特殊组合上，而这两者现在已经过时了。