Josh Stratton wrote:
> Hey, I can just change it to QWidget, and I get a connection function
> now. This is wonderful! One other question, though. Is there a way
> to create custom slots in just ruby?
You should really ask these questions at jruby resource - they are
related to jruby/java integration and you'll get better help there.
Answering you question - JRuby generates very crappy code from
reflection point of view. It's impossible to reference on jruby symbols
using reflection unless those forced by something - like java interface
impl.
So my recipe looks like this:
Action.java:
public interface Action {
void apply();
}
signal.rb:
require "java"
include_class Java::Action
include_class Java::com.trolltech.qt.gui.QWidget
include_class Java::com.trolltech.qt.gui.QPushButton
include_class Java::com.trolltech.qt.gui.QApplication
class RubyAction
include Action
def initialize(f)
@f = f
end
def apply
@f.call
end
end
class QWidget
def on(sym, &block)
self.getClass.fields.select {|f| f.name == sym.id2name
}.first.get(self).connect(RubyAction.new(block), "apply()")
end
end
QApplication.initialize([].to_java(:string))
btn = QPushButton.new("quit")
btn.resize(100,100)
btn.on :clicked do
QApplication.quit
end
btn.show
QApplication.exec
As you can see it uses better looking syntax with code blocks than
reflective slots approach.
--
Best Regards,
Vladimir Kirichenko
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