[Kde-bindings] Using Signals/Slots with String argument

[Mat Arge]

Hy!

I am unable to use signals/slots which use String as an argument. I created 
the code below to watch the value of a QInputDialog, If I set its InputMode to 
IntINput, everything works fine. But if I use the TextInput InputMode I get 
the error message 
QSignalSpy: No such signal: 'textValueChanged(string)'

Even worse, if I try to define my own signal MySignal which uses a string 
argument, once I emit it I first get the error

Cannot handle 'string' as slot argument

promptly followed by a stacktrace, followed by a native stacktrace:
Stacktrace:

  at (wrapper managed-to-native) QtCore.SignalInvocation.SignalEmit 
(string,string,intptr,intptr,int) <0xffffffff>
  at QtCore.SignalInvocation.Invoke 
(System.Runtime.Remoting.Messaging.IMessage) <0x002af>
  at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke 
(System.Runtime.Remoting.Proxies.RealProxy,System.Runtime.Remoting.Messaging.IMessage,System.Exception&,object[]&) 
<0x003e3>
  at (wrapper runtime-invoke) 
<Module>.runtime_invoke_object_object_object_Exception&_object[]& 
(object,intptr,intptr,intptr) <0xffffffff>
  at (wrapper managed-to-native) object.__icall_wrapper_mono_remoting_wrapper 
(intptr,intptr) <0xffffffff>
  at (wrapper remoting-invoke) IMySignals.MySignal (string) <0xffffffff>
  at Dialog.<Dialog>m__1 () <0x000d2>
  at (wrapper runtime-invoke) object.runtime_invoke_void__this__ 
(object,intptr,intptr,intptr) <0xffffffff>
  at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke 
(System.Reflection.MonoMethod,object,object[],System.Exception&) <0xffffffff>
  at System.Reflection.MonoMethod.Invoke 
(object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) 
<0x0013f>
  at System.Reflection.MethodBase.Invoke (object,object[]) <0x00022>
  at System.Delegate.DynamicInvokeImpl (object[]) <0x001bf>
  at System.MulticastDelegate.DynamicInvokeImpl (object[]) <0x00033>
  at System.Delegate.DynamicInvoke (object[]) <0x00016>
  at QtCore.SmokeInvocation.InvokeDelegate (System.Delegate,intptr) <0x000bf>
  at (wrapper native-to-managed) QtCore.SmokeInvocation.InvokeDelegate 
(System.Delegate,intptr) <0xffffffff>
  at (wrapper managed-to-native) QtCore.SmokeInvocation.CallSmokeMethod 
(intptr,int,intptr,intptr,int,intptr) <0xffffffff>
  at QtCore.SmokeInvocation.Invoke (string,string,System.Type,bool,object[]) 
<0x00277>
  at QtGui.QApplication.Exec () <0x00047>
  at Dialog.Main (string[]) <0x00047>
  at (wrapper runtime-invoke) <Module>.runtime_invoke_int_object 
(object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        mono() [0x80e903d]
        linux-gate.so.1(__kernel_rt_sigreturn+0) [0xb772b410]
 ...

Here is my sample code:

using System;
using QtCore;
using QtGui;

public class Dialog : QWidget
{
  int width = 250;
  int height = 200;


  public Dialog()
  {
    WindowTitle = "Input test";

    Resize(width, height);

    var vbox = new QVBoxLayout(this);
    QPushButton quit = new QPushButton("Quit");
    Connect(quit, SIGNAL("clicked()"), () => QCoreApplication.Quit());
    vbox.AddWidget(quit);
    
    QPushButton dialogB1 = new QPushButton("Dialog Int");
    Connect(dialogB1, SIGNAL("clicked()"), this, 
SLOT("OnDialogIntClicked()"));
    vbox.AddWidget(dialogB1);

    QPushButton dialogB2 = new QPushButton("Dialog Text");
    Connect(dialogB2, SIGNAL("clicked()"), this, 
SLOT("OnDialogTextClicked()"));
    vbox.AddWidget(dialogB2);
   
    QPushButton mySig = new QPushButton("MySignal");
    Connect(mySig, SIGNAL("clicked()"), () => {Emit.MySignal("Signal emitted 
at "+DateTime.Now);});
    vbox.AddWidget(mySig);
    
    Show();
   }

  [Q_SLOT]
    public void OnDialogIntClicked()
    {
      var dialog = new QInputDialog(this);
      dialog.inputMode = QInputDialog.InputMode.IntInput;
      dialog.Open();
            Connect(dialog, SIGNAL("intValueChanged(int)"), (int i) => 
{Console.WriteLine("New Int value: '{0}'", i);});
    }

  [Q_SLOT]
    public void OnDialogTextClicked()
    {
      var dialog = new QInputDialog(this);
      dialog.inputMode = QInputDialog.InputMode.TextInput;
      dialog.Open();
      Connect(dialog, SIGNAL("textValueChanged(string)"), (string s) => 
{Console.WriteLine("New Text value: '{0}'", s);});
    }
  
  protected new IMySignals Emit {
    get {
      return (IMySignals) Q_EMIT;
    }
  }


   [STAThread]
     public static int Main(string[] args)
     {
       new QApplication(args);
       var app = new Dialog();
       return QApplication.Exec();
     }
}

public interface IMySignals : IQWidgetSignals {
        [Q_SIGNAL("mySignal(string)")]
        void MySignal(string val);
}


cheers
Mat
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