<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><span class="tab"> You can use QtCoreApplication.Invoke. About </span>InvokeMethod <div style="display: block;" class="yahoo_quoted"> <br> <br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> On Tuesday, October 29, 2013 2:46 PM, Mat Arge <argemat1010@gmail.com> wrote:<br> </font> </div> <div class="y_msg_container">What I acutally want to achieve, is to change the UI from a different thread. <br clear="none">According to the www, executing code in the UI thread can either be achieved <br clear="none">via QMetaObject.InvokeMethod (see my
other message to the list today) or via a <br clear="none">signal/slot combination and so far I haven't managed to make either of them <br clear="none">work in Qyoto.<br clear="none"><br clear="none">cheers<br clear="none">Mat<br clear="none"><div class="yqt6454186082" id="yqtfd98996"><br clear="none">On Tuesday 29. October 2013 05:42:01 Dimitar Dobrev wrote:<br clear="none">> Hello, Mat,<br clear="none">> <br clear="none">> I don't know if adding slots as string has ever worked (it's not me who<br clear="none">> authored that part), I've never tried it. But let me ask you, why do you<br clear="none">> need it? Why don't you simply use the events that wrap signals? In your<br clear="none">> case that would be:<br clear="none">> <br clear="none">> dialogB1.Clicked += OnDialogIntClicked;<br clear="none">> <br clear="none">> <br clear="none">> About custom
signals, it's analogous: I haven't tried them (and<br clear="none">> therefore I don't know if they've ever worked) but you can simply use<br clear="none">> Mono/.NET events instead.<br clear="none">> <br clear="none">> Regards,<br clear="none">> Dimitar<br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> On Tuesday, October 29, 2013 2:32 PM, Mat Arge <<a shape="rect" ymailto="mailto:argemat1010@gmail.com" href="mailto:argemat1010@gmail.com">argemat1010@gmail.com</a>><br clear="none">> wrote:<br clear="none">> <br clear="none">> Hy!<br clear="none">> <br clear="none">> I am unable to use signals/slots which use String as an argument. I created<br clear="none">> the code below to watch the value of a QInputDialog, If I set its InputMode<br clear="none">> to IntINput, everything works fine. But if I use the TextInput InputMode
I<br clear="none">> get the error message<br clear="none">> QSignalSpy: No such signal: 'textValueChanged(string)'<br clear="none">> <br clear="none">> Even worse, if I try to define my own signal MySignal which uses a string<br clear="none">> argument, once I emit it I first get the error<br clear="none">> <br clear="none">> Cannot handle 'string' as slot argument<br clear="none">> <br clear="none">> promptly followed by a stacktrace, followed by a native stacktrace:<br clear="none">> Stacktrace:<br clear="none">> <br clear="none">> at (wrapper managed-to-native) QtCore.SignalInvocation.SignalEmit<br clear="none">> (string,string,intptr,intptr,int) <0xffffffff><br clear="none">> at QtCore.SignalInvocation.Invoke<br clear="none">> (System.Runtime.Remoting.Messaging.IMessage) <0x002af><br clear="none">> at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke<br
clear="none">> (System.Runtime.Remoting.Proxies.RealProxy,System.Runtime.Remoting.Messaging<br clear="none">> .IMessage,System.Exception&,object[]&) <0x003e3><br clear="none">> at (wrapper runtime-invoke)<br clear="none">> <Module>.runtime_invoke_object_object_object_Exception&_object[]&<br clear="none">> (object,intptr,intptr,intptr) <0xffffffff><br clear="none">> at (wrapper managed-to-native)<br clear="none">> object.__icall_wrapper_mono_remoting_wrapper (intptr,intptr) <0xffffffff><br clear="none">> at (wrapper remoting-invoke) IMySignals.MySignal (string) <0xffffffff><br clear="none">> at Dialog.<Dialog>m__1 () <0x000d2><br clear="none">> at (wrapper runtime-invoke) object.runtime_invoke_void__this__<br clear="none">> (object,intptr,intptr,intptr) <0xffffffff><br clear="none">> at (wrapper managed-to-native)
System.Reflection.MonoMethod.InternalInvoke<br clear="none">> (System.Reflection.MonoMethod,object,object[],System.Exception&)<br clear="none">> <0xffffffff> at System.Reflection.MonoMethod.Invoke<br clear="none">> (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],Sys<br clear="none">> tem.Globalization.CultureInfo) <0x0013f><br clear="none">> at System.Reflection.MethodBase.Invoke (object,object[]) <0x00022><br clear="none">> at System.Delegate.DynamicInvokeImpl (object[]) <0x001bf><br clear="none">> at System.MulticastDelegate.DynamicInvokeImpl (object[]) <0x00033><br clear="none">> at System.Delegate.DynamicInvoke (object[]) <0x00016><br clear="none">> at QtCore.SmokeInvocation.InvokeDelegate (System.Delegate,intptr)<br clear="none">> <0x000bf> at (wrapper native-to-managed)<br clear="none">>
QtCore.SmokeInvocation.InvokeDelegate (System.Delegate,intptr) <0xffffffff><br clear="none">> at (wrapper managed-to-native) QtCore.SmokeInvocation.CallSmokeMethod<br clear="none">> (intptr,int,intptr,intptr,int,intptr) <0xffffffff><br clear="none">> at QtCore.SmokeInvocation.Invoke (string,string,System.Type,bool,object[])<br clear="none">> <0x00277><br clear="none">> at QtGui.QApplication.Exec () <0x00047><br clear="none">> at Dialog.Main (string[]) <0x00047><br clear="none">> at (wrapper runtime-invoke) <Module>.runtime_invoke_int_object<br clear="none">> (object,intptr,intptr,intptr) <0xffffffff><br clear="none">> <br clear="none">> Native stacktrace:<br clear="none">> <br clear="none">> mono() [0x80e903d]<br clear="none">> linux-gate.so.1(__kernel_rt_sigreturn+0) [0xb772b410]<br
clear="none">> ...<br clear="none">> <br clear="none">> Here is my sample code:<br clear="none">> <br clear="none">> using System;<br clear="none">> using QtCore;<br clear="none">> using QtGui;<br clear="none">> <br clear="none">> public class Dialog : QWidget<br clear="none">> {<br clear="none">> int width = 250;<br clear="none">> int height = 200;<br clear="none">> <br clear="none">> <br clear="none">> public Dialog()<br clear="none">> {<br clear="none">> WindowTitle = "Input test";<br clear="none">> <br clear="none">> Resize(width, height);<br clear="none">> <br clear="none">> var vbox = new QVBoxLayout(this);<br clear="none">> QPushButton quit = new QPushButton("Quit");<br clear="none">> Connect(quit, SIGNAL("clicked()"), () => QCoreApplication.Quit());<br clear="none">>
vbox.AddWidget(quit);<br clear="none">> <br clear="none">> QPushButton dialogB1 = new QPushButton("Dialog Int");<br clear="none">> Connect(dialogB1, SIGNAL("clicked()"), this,<br clear="none">> SLOT("OnDialogIntClicked()"));<br clear="none">> vbox.AddWidget(dialogB1);<br clear="none">> <br clear="none">> QPushButton dialogB2 = new QPushButton("Dialog Text");<br clear="none">> Connect(dialogB2, SIGNAL("clicked()"), this,<br clear="none">> SLOT("OnDialogTextClicked()"));<br clear="none">> vbox.AddWidget(dialogB2);<br clear="none">> <br clear="none">> QPushButton mySig = new QPushButton("MySignal");<br clear="none">> Connect(mySig, SIGNAL("clicked()"), () => {Emit.MySignal("Signal emitted<br clear="none">> at "+DateTime.Now);});<br clear="none">>
vbox.AddWidget(mySig);<br clear="none">> <br clear="none">> Show();<br clear="none">> }<br clear="none">> <br clear="none">> [Q_SLOT]<br clear="none">> public void OnDialogIntClicked()<br clear="none">> {<br clear="none">> var dialog = new QInputDialog(this);<br clear="none">> dialog.inputMode = QInputDialog.InputMode.IntInput;<br clear="none">> dialog.Open();<br clear="none">> Connect(dialog, SIGNAL("intValueChanged(int)"), (int i) =><br clear="none">> {Console.WriteLine("New Int value: '{0}'", i);});<br clear="none">> }<br clear="none">> <br clear="none">> [Q_SLOT]<br clear="none">> public void OnDialogTextClicked()<br clear="none">> {<br clear="none">>
var dialog = new QInputDialog(this);<br clear="none">> dialog.inputMode = QInputDialog.InputMode.TextInput;<br clear="none">> dialog.Open();<br clear="none">> Connect(dialog, SIGNAL("textValueChanged(string)"), (string s) =><br clear="none">> {Console.WriteLine("New Text value: '{0}'", s);});<br clear="none">> }<br clear="none">> <br clear="none">> protected new IMySignals Emit {<br clear="none">> get {<br clear="none">> return (IMySignals) Q_EMIT;<br clear="none">> }<br clear="none">> }<br clear="none">> <br clear="none">> <br clear="none">> [STAThread]<br clear="none">> public static int Main(string[] args)<br clear="none">> {<br clear="none">> new
QApplication(args);<br clear="none">> var app = new Dialog();<br clear="none">> return QApplication.Exec();<br clear="none">> }<br clear="none">> }<br clear="none">> <br clear="none">> public interface IMySignals : IQWidgetSignals {<br clear="none">> [Q_SIGNAL("mySignal(string)")]<br clear="none">> void MySignal(string val);<br clear="none">> }<br clear="none">> <br clear="none">> <br clear="none">> cheers<br clear="none">> Mat<br clear="none">> _______________________________________________<br clear="none">> Kde-bindings mailing list<br clear="none">> <a shape="rect" ymailto="mailto:Kde-bindings@kde.org" href="mailto:Kde-bindings@kde.org">Kde-bindings@kde.org</a><br clear="none">> <a shape="rect" href="https://mail.kde.org/mailman/listinfo/kde-bindings"
target="_blank">https://mail.kde.org/mailman/listinfo/kde-bindings</a><br clear="none"></div><br><div class="yqt6454186082" id="yqtfd28258">_______________________________________________<br clear="none">Kde-bindings mailing list<br clear="none"><a shape="rect" ymailto="mailto:Kde-bindings@kde.org" href="mailto:Kde-bindings@kde.org">Kde-bindings@kde.org</a><br clear="none"><a shape="rect" href="https://mail.kde.org/mailman/listinfo/kde-bindings" target="_blank">https://mail.kde.org/mailman/listinfo/kde-bindings</a><br clear="none"></div><br><br></div> </div> </div> </div> and slots as strings, I will only make sure they work with in the new Qyoto version.<br><br><span class="tab"> Dimitar</span><br></div></body></html>