From 356966f4ca2eccd9d47c4853f48dd2d702522edf Mon Sep 17 00:00:00 2001
From: Uwe Rathmann <Uwe.Rathmann@tigertal.de>
Date: Mon, 26 Feb 2018 09:39:53 +0100
Subject: [PATCH] invoker testprogram added

---
 playground/invoker/Invoker.cpp | 49 +++++++++++++++++++++++
 playground/invoker/Invoker.h   | 34 ++++++++++++++++
 playground/invoker/invoker.pro | 10 +++++
 playground/invoker/main.cpp    | 73 ++++++++++++++++++++++++++++++++++
 playground/playground.pro      |  1 +
 5 files changed, 167 insertions(+)
 create mode 100644 playground/invoker/Invoker.cpp
 create mode 100644 playground/invoker/Invoker.h
 create mode 100644 playground/invoker/invoker.pro
 create mode 100644 playground/invoker/main.cpp

diff --git a/playground/invoker/Invoker.cpp b/playground/invoker/Invoker.cpp
new file mode 100644
index 00000000..59817df3
--- /dev/null
+++ b/playground/invoker/Invoker.cpp
@@ -0,0 +1,49 @@
+/******************************************************************************
+ * QSkinny - Copyright (C) 2016 Uwe Rathmann
+ * This file may be used under the terms of the 3-clause BSD License
+ *****************************************************************************/
+
+#include "Invoker.h"
+
+Invoker::Invoker( QObject* parent ):
+    QObject( parent )
+{
+}
+
+void Invoker::addCallback( const QObject* object,
+    const QskMetaFunction& function )
+{
+    m_callbacks += QskMetaCallback( object, function, Qt::DirectConnection );
+}
+
+void Invoker::invoke( qreal realValue, int intValue )
+{
+    for ( auto callback : qskAsConst( m_callbacks ) )
+    {
+        void* args[3] = { nullptr };
+
+        const auto types = callback.parameterTypes();
+
+        int i = 1;
+        for ( auto type : types )
+        {
+            switch ( type )
+            {
+                case QMetaType::Int:
+                {
+                    args[i++] = reinterpret_cast< void* >( &intValue );
+                    break;
+                }
+                case QMetaType::Double:
+                {
+                    args[i++] = reinterpret_cast< void* >( &realValue );
+                    break;
+                }
+                default:
+                    break;
+            }
+        }
+
+        callback.invoke( args );
+    }
+}
diff --git a/playground/invoker/Invoker.h b/playground/invoker/Invoker.h
new file mode 100644
index 00000000..aaf6798e
--- /dev/null
+++ b/playground/invoker/Invoker.h
@@ -0,0 +1,34 @@
+/******************************************************************************
+ * QSkinny - Copyright (C) 2016 Uwe Rathmann
+ * This file may be used under the terms of the 3-clause BSD License
+ *****************************************************************************/
+
+#ifndef INVOKER_H
+#define INVOKER_H 1
+
+#include <QskMetaFunction.h>
+#include <QskMetaCallback.h>
+
+#include <QObject>
+#include <QVector>
+
+class Invoker : public QObject
+{
+public:
+    Invoker( QObject* parent = nullptr );
+
+    void addCallback( const QskMetaFunction& );
+    void addCallback( const QObject*, const QskMetaFunction& );
+
+    void invoke( qreal d, int i );
+
+private:
+    QVector< QskMetaCallback > m_callbacks;
+};
+
+inline void Invoker::addCallback( const QskMetaFunction& function )
+{
+    addCallback( this, function );
+}
+
+#endif
diff --git a/playground/invoker/invoker.pro b/playground/invoker/invoker.pro
new file mode 100644
index 00000000..f1cf4476
--- /dev/null
+++ b/playground/invoker/invoker.pro
@@ -0,0 +1,10 @@
+include( $${PWD}/../playground.pri )
+
+TARGET = invoker
+
+HEADERS += \
+    Invoker.h
+
+SOURCES += \
+    Invoker.cpp \
+    main.cpp
diff --git a/playground/invoker/main.cpp b/playground/invoker/main.cpp
new file mode 100644
index 00000000..d5858c56
--- /dev/null
+++ b/playground/invoker/main.cpp
@@ -0,0 +1,73 @@
+/******************************************************************************
+ * QSkinny - Copyright (C) 2016 Uwe Rathmann
+ * This file may be used under the terms of the 3-clause BSD License
+ *****************************************************************************/
+
+#include "Invoker.h"
+#include <QDebug>
+
+static void debugValueI( int i )
+{
+    qDebug() << i;
+}
+
+static void debugValue( qreal d, int i )
+{
+    qDebug() << d << i;
+}
+
+class MyObject : public QObject
+{
+public:
+    MyObject( QObject* parent = nullptr ):
+        QObject( parent )
+    {
+    }
+
+    void print1( double d, int i ) const
+    {
+        qDebug() << d << i;
+    }
+
+    void print2( int i, double d ) const
+    {
+        qDebug() << i << d;
+    }
+
+    void print3( double d ) const
+    {
+        qDebug() << d;
+    }
+
+    void print4( int i ) const
+    {
+        qDebug() << i;
+    }
+};
+
+int main( int argc, char* argv[] )
+{
+    Q_UNUSED( argc )
+    Q_UNUSED( argv )
+
+    MyObject object;
+
+    Invoker invoker;
+
+    invoker.addCallback( debugValue );
+    invoker.addCallback( debugValueI );
+    invoker.addCallback( &object, &MyObject::print1 );
+    invoker.addCallback( &object, &MyObject::print2 );
+    invoker.addCallback( &object, &MyObject::print3 );
+    invoker.addCallback( &object, &MyObject::print4 );
+    invoker.addCallback( &object, []( double d, int i ) { qDebug() << d << i; } );
+    invoker.addCallback( &object, []( int i, double d ) { qDebug() << i << d; } );
+    invoker.addCallback( &object, []( double d ) { qDebug() << d; } );
+    invoker.addCallback( []() { qDebug() << "HERE"; } );
+    invoker.addCallback( [ = ]( double d, int i ) { qDebug() << d << i; } );
+    invoker.addCallback( []( int i, double d ) { qDebug() << i << d; } );
+    invoker.addCallback( []( int i ) { qDebug() << i; } );
+    invoker.addCallback( []( double d ) { qDebug() << d; } );
+
+    invoker.invoke( 3.14, 35 );
+}
diff --git a/playground/playground.pro b/playground/playground.pro
index 0df664e1..eda45616 100644
--- a/playground/playground.pro
+++ b/playground/playground.pro
@@ -4,5 +4,6 @@ TEMPLATE = subdirs
 
 # qml
 SUBDIRS += \
+    invoker \
     inputpanel \
     images