From 41c073b2e61e8c0562cbdf25bdad8a3133275f81 Mon Sep 17 00:00:00 2001
From: Lauro Moura <lauromoura@expertisesolutions.com.br>
Date: Thu, 23 Nov 2017 22:01:25 -0300
Subject: [PATCH] efl_mono: Add examples code.

Buildsystem support will be enabled in a future commit
---
 src/Makefile.am                               |   1 +
 .../ecore/efl_loop_callback_add_event.cs      |  43 ++++++
 src/examples/ecore/efl_loop_timer_example.cs  |  52 ++++++++
 src/examples/efl_mono/.gitignore              |   1 +
 src/examples/efl_mono/EoInherit01.cs          |  64 +++++++++
 src/examples/efl_mono/FunctionPointer01.cs    |  45 +++++++
 src/examples/efl_mono/Makefile.am             | 123 +++++++++++++++++
 src/examples/efl_mono/example_numberwrapper.c |  87 ++++++++++++
 .../efl_mono/example_numberwrapper.eo         |  30 +++++
 src/examples/eina/EinaArray01.cs              |  41 ++++++
 src/examples/eina/EinaBinbuf01.cs             |  65 +++++++++
 src/examples/eina/EinaError01.cs              |  75 +++++++++++
 src/examples/eina/EinaHash01.cs               |  66 +++++++++
 src/examples/elementary/efl_ui_slider_mono.cs |  63 +++++++++
 src/examples/evas/evas_mono_box.cs            |  73 ++++++++++
 src/examples/evas/evas_mono_image.cs          |  93 +++++++++++++
 src/examples/evas/evas_mono_image2.cs         |  83 ++++++++++++
 src/examples/evas/evas_mono_rectangle.cs      |  47 +++++++
 src/examples/evas/evas_mono_table.cs          |  77 +++++++++++
 src/examples/evas/evas_mono_text.cs           | 126 ++++++++++++++++++
 20 files changed, 1255 insertions(+)
 create mode 100644 src/examples/ecore/efl_loop_callback_add_event.cs
 create mode 100644 src/examples/ecore/efl_loop_timer_example.cs
 create mode 100644 src/examples/efl_mono/.gitignore
 create mode 100644 src/examples/efl_mono/EoInherit01.cs
 create mode 100644 src/examples/efl_mono/FunctionPointer01.cs
 create mode 100644 src/examples/efl_mono/Makefile.am
 create mode 100644 src/examples/efl_mono/example_numberwrapper.c
 create mode 100644 src/examples/efl_mono/example_numberwrapper.eo
 create mode 100644 src/examples/eina/EinaArray01.cs
 create mode 100644 src/examples/eina/EinaBinbuf01.cs
 create mode 100644 src/examples/eina/EinaError01.cs
 create mode 100644 src/examples/eina/EinaHash01.cs
 create mode 100644 src/examples/elementary/efl_ui_slider_mono.cs
 create mode 100644 src/examples/evas/evas_mono_box.cs
 create mode 100644 src/examples/evas/evas_mono_image.cs
 create mode 100644 src/examples/evas/evas_mono_image2.cs
 create mode 100644 src/examples/evas/evas_mono_rectangle.cs
 create mode 100644 src/examples/evas/evas_mono_table.cs
 create mode 100644 src/examples/evas/evas_mono_text.cs

diff --git a/src/Makefile.am b/src/Makefile.am
index 2651fd89ab..74ec6cdb2b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -125,6 +125,7 @@ examples/emotion \
 examples/emile \
 examples/elocation \
 examples/ethumb_client \
+examples/efl_mono \
 examples/elementary
 
 if HAVE_ELUA
diff --git a/src/examples/ecore/efl_loop_callback_add_event.cs b/src/examples/ecore/efl_loop_callback_add_event.cs
new file mode 100644
index 0000000000..fe81bfd9ad
--- /dev/null
+++ b/src/examples/ecore/efl_loop_callback_add_event.cs
@@ -0,0 +1,43 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+
+class TestMain
+{
+    /* private efl.Loop loop; */
+
+    public TestMain(efl.Loop loop)
+    {
+        /* this.loop = loop; */
+    }
+
+    static void Main(string[] args)
+    {
+        efl.All.Init();
+
+        efl.Loop loop = new efl.LoopConcrete();
+
+        TestMain listener = new TestMain(loop);
+
+        loop.CALLBACK_ADD += listener.callback_added_cb;
+
+        loop.CALLBACK_ADD += listener.on_idle_enter;
+        loop.CALLBACK_ADD -= listener.on_idle_enter;
+
+        loop.IDLE += listener.on_idle_enter; // Will trigger CALLBACK_ADD
+
+        efl.All.Shutdown();
+    }
+
+    public void on_idle_enter(object sender, EventArgs e)
+    {
+        Console.WriteLine("I should not be called while the loop is not running...");
+    }
+
+    public void callback_added_cb(object sender, EventArgs e)
+    {
+        Console.WriteLine("Looks like we added a new callback.");
+    }
+}
+
+
diff --git a/src/examples/ecore/efl_loop_timer_example.cs b/src/examples/ecore/efl_loop_timer_example.cs
new file mode 100644
index 0000000000..dd6b2b8606
--- /dev/null
+++ b/src/examples/ecore/efl_loop_timer_example.cs
@@ -0,0 +1,52 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+
+class TestMain
+{
+    private efl.Loop loop;
+    private int count;
+
+    public TestMain(efl.Loop loop)
+    {
+        this.loop = loop;
+        this.count = 0;
+    }
+
+    static void Main(string[] args)
+    {
+        efl.All.Init();
+
+        efl.Loop loop = new efl.LoopConcrete();
+        efl.loop.Timer timer = new efl.loop.TimerConcrete(loop);
+
+        TestMain listener = new TestMain(loop);
+
+        Console.WriteLine("Starting MainLoop");
+
+        timer.interval_set(1.0);
+
+        timer.TICK += listener.on_tick;
+        timer.TICK += listener.another_callback;
+        timer.TICK -= listener.another_callback;
+
+        loop.begin();
+
+        efl.All.Shutdown();
+    }
+
+    public void on_tick(object sender, EventArgs e)
+    {
+        Console.WriteLine("on_tick called on listener");
+
+        if (count++ == 5)
+            loop.quit(0);
+    }
+
+    public void another_callback(object sender, EventArgs e)
+    {
+        Console.WriteLine("Ooops. Should not have been called...");
+    }
+}
+
+
diff --git a/src/examples/efl_mono/.gitignore b/src/examples/efl_mono/.gitignore
new file mode 100644
index 0000000000..7a426d39c3
--- /dev/null
+++ b/src/examples/efl_mono/.gitignore
@@ -0,0 +1 @@
+/example_numberwrapper.out
diff --git a/src/examples/efl_mono/EoInherit01.cs b/src/examples/efl_mono/EoInherit01.cs
new file mode 100644
index 0000000000..6b899aeca1
--- /dev/null
+++ b/src/examples/efl_mono/EoInherit01.cs
@@ -0,0 +1,64 @@
+using static System.Console;
+
+class PlusTenNumberWrapper : example.NumberwrapperInherit
+{
+    public PlusTenNumberWrapper(efl.Object parent = null)
+        : base(parent)
+    {}
+
+    public bool derivedCalled = false;
+
+    override public void SetNumber(int n)
+    {
+        // Call native EFL method
+        base.SetNumber(n + 10);
+        derivedCalled = true;
+    }
+}
+
+public class ExampleEoInherit01
+{
+    public static void Main()
+    {
+        eina.Config.Init();
+        efl.eo.Config.Init();
+
+        var inheritObj = new PlusTenNumberWrapper();
+
+        WriteLine("## Using inherit object ##\n");
+
+        int given = 111;
+
+        // Call the C# override from the C method
+        example.NumberwrapperConcrete.example_numberwrapper_number_set(inheritObj.raw_handle, given);
+
+        WriteLine($"Override successfully called? {inheritObj.derivedCalled}!\n");
+
+        // Call C function from C# object
+        int stored = inheritObj.GetNumber();
+
+        WriteLine($"Given value: {given}");
+        WriteLine($"Stored value: {stored}\n");
+
+        // Call C# override directly
+        given = 333;
+        inheritObj.SetNumber(given);
+
+        stored = inheritObj.GetNumber();
+
+        WriteLine($"Given value: {given}");
+        WriteLine($"Stored value: {stored}\n");
+
+        WriteLine("## Using original object ##\n");
+
+        // Check original EFL object
+        var origObj = new example.NumberwrapperConcrete();
+        given = 111;
+        origObj.SetNumber(given);
+        stored = origObj.GetNumber();
+
+        WriteLine($"Given value: {given}");
+        WriteLine($"Stored value: {stored}\n");
+    }
+}
+
diff --git a/src/examples/efl_mono/FunctionPointer01.cs b/src/examples/efl_mono/FunctionPointer01.cs
new file mode 100644
index 0000000000..2954473a27
--- /dev/null
+++ b/src/examples/efl_mono/FunctionPointer01.cs
@@ -0,0 +1,45 @@
+using static System.Console;
+
+public class ExampleFunctionPointer01
+{
+    private static bool static_called = false;
+
+    private static int twiceCb(int n)
+    {
+        static_called = true;
+        return n * 2;
+    }
+
+    public static void Main()
+    {
+        eina.Config.Init();
+        efl.eo.Config.Init();
+
+        var obj = new example.NumberwrapperConcrete();
+
+        // Set internal value
+        obj.SetNumber(12);
+
+        // With static method
+        obj.SetNumberCallback(twiceCb);
+
+        var ret = obj.CallCallback();
+
+        WriteLine($"Callback called? {static_called}.");
+        WriteLine($"Returned value: {ret}.\n");
+
+        // With lambda
+        bool lamda_called = false;
+
+        obj.SetNumberCallback(n => {
+            lamda_called = true;
+            return n * 3;
+        });
+
+        ret = obj.CallCallback();
+
+        WriteLine($"Lambda called? {lamda_called}.");
+        WriteLine($"Returned value: {ret}.\n");
+    }
+}
+
diff --git a/src/examples/efl_mono/Makefile.am b/src/examples/efl_mono/Makefile.am
new file mode 100644
index 0000000000..6bae1d9ee2
--- /dev/null
+++ b/src/examples/efl_mono/Makefile.am
@@ -0,0 +1,123 @@
+MAINTAINERCLEANFILES = Makefile.in
+
+if HAVE_CSHARP
+
+include $(top_srcdir)/src/Makefile_Eolian_Helper.am
+include $(top_srcdir)/src/Makefile_Eolian_Mono_Helper.am
+include $(top_srcdir)/src/Makefile_Efl_Mono_MSBuild_Gen_Helper.am
+
+SRCS =
+EXTRA_FILES =
+EXTRA_PROGRAMS =
+GENERATED =
+CLEANFILES =
+
+# Simple object used by the examples
+
+EOLIAN_FLAGS := $(EOLIAN_FLAGS)
+EOLIAN_FLAGS += \
+-I$(srcdir) \
+-I$(top_srcdir)/src/lib/eo \
+-I$(top_srcdir)/src/lib/efl
+
+COMMON_FLAGS = \
+@EINA_CFLAGS@ @EINA_LDFLAGS@ \
+-L$(top_builddir)/src/lib/eina/.libs -leina \
+@EO_CFLAGS@ @EO_LDFLAGS@ \
+-L$(top_builddir)/src/lib/eo/.libs -leo \
+@EFL_CFLAGS@ @EFL_LDFLAGS@ \
+-L$(top_builddir)/src/lib/efl/.libs -lefl
+
+if HAVE_WIN32
+COMMON_FLAGS += \
+@EVIL_CFLAGS@ @EVIL_LDFLAGS@ \
+@EFL_WINDOWS_VERSION_CFLAGS@ \
+-L$(top_builddir)/src/lib/evil/.libs -levil
+else
+COMMON_FLAGS += \
+-fPIC -DPIC
+endif
+
+
+%.eo.c: %.eo
+	$(AM_V_EOL)$(EOLIAN_GEN) $(EOLIAN_FLAGS) -gc -o c:$@ $<
+
+%.eo.h: %.eo
+	$(AM_V_EOL)$(EOLIAN_GEN) $(EOLIAN_FLAGS) -gh -o h:$@ $<
+
+example_numberwrapper.c: example_numberwrapper.eo.h example_numberwrapper.eo.c
+
+numberwrapper_lib_name = example_numberwrapper.out
+
+$(numberwrapper_lib_name): example_numberwrapper.c
+	$(CC) -shared -o $@ $< -DEFL_BETA_API_SUPPORT -I. $(COMMON_FLAGS)
+
+SRCS += example_numberwrapper.c
+EXTRA_FILES += example_numberwrapper.eo
+GENERATED += example_numberwrapper.eo.h example_numberwrapper.eo.c $(numberwrapper_lib_name)
+
+# CSharp examples
+
+SRCS += \
+EoInherit01.cs \
+FunctionPointer01.cs
+
+EXTRA_PROGRAMS += \
+EoInherit01.exe \
+FunctionPointer01.exe
+
+example_numberwrapper.eo.cs: example_numberwrapper.eo
+	$(AM_V_EOLMONO) \
+	$(EOLIAN_MONO) $(EOLIAN_FLAGS) $(EOLIAN_MONO_FLAGS) --dllimport $(numberwrapper_lib_name) -o $@ -r $(top_builddir)/src/bindings/mono/efl_mono/efl_libs.csv $<
+
+EoInherit01_exe_SOURCES = EoInherit01.cs
+EoInherit01_srcs = $(EoInherit01_exe_SOURCES) example_numberwrapper.eo.cs
+EoInherit01.exe$(EXEEXT): $(EoInherit01_srcs) $(am_dirstamp) $(top_builddir)/src/lib/efl_mono/libefl_mono.dll$(EXEEXT) $(numberwrapper_lib_name)
+	@rm -f $@
+	$(AM_V_MCS) $(MCS) $(MCS_FLAGS) -r:$(abs_top_builddir)/src/lib/efl_mono/libefl_mono.dll$(EXEEXT) -out:$@ $(filter %.cs, $(^))
+
+$(abs_top_builddir)/EoInherit01.csproj: $(EoInherit01_srcs) $(am_dirstamp) $(numberwrapper_lib_name)
+	@rm -f $@
+	$(EFL_MONO_MSBUILD_GEN) $(MSBUILD_GEN_FLAGS) -o $@ -a EoInherit01.exe -r libefl_mono.dll -t exe $(patsubst %.cs,src/examples/efl_mono/%.cs,$(filter %.cs, $(^)))
+
+
+FunctionPointer01_exe_SOURCES = FunctionPointer01.cs
+FunctionPointer01_srcs = $(FunctionPointer01_exe_SOURCES) example_numberwrapper.eo.cs
+FunctionPointer01.exe$(EXEEXT): $(FunctionPointer01_srcs) $(am_dirstamp) $(top_builddir)/src/lib/efl_mono/libefl_mono.dll$(EXEEXT) $(numberwrapper_lib_name)
+	@rm -f $@
+	$(AM_V_MCS) $(MCS) $(MCS_FLAGS) -r:$(abs_top_builddir)/src/lib/efl_mono/libefl_mono.dll$(EXEEXT) -out:$@ $(filter %.cs, $(^))
+
+$(abs_top_builddir)/FunctionPointer01.csproj: $(FunctionPointer01_srcs) $(am_dirstamp) $(numberwrapper_lib_name)
+	@rm -f $@
+	$(EFL_MONO_MSBUILD_GEN) $(MSBUILD_GEN_FLAGS) -o $@ -a FunctionPointer01.exe -r libefl_mono.dll -t exe $(patsubst %.cs,src/examples/efl_mono/%.cs,$(filter %.cs, $(^)))
+
+msbuildcsprojs: $(abs_top_builddir)/EoInherit01.csproj $(abs_top_builddir)/FunctionPointer01.csproj
+
+GENERATED += example_numberwrapper.eo.cs
+
+
+# Finishing
+
+EXTRA_DIST = $(EXTRA_FILES)
+
+CLEANFILES += $(GENERATED)
+
+examples: $(EXTRA_PROGRAMS)
+
+clean-local:
+	rm -f $(EXTRA_PROGRAMS) $(GENERATED)
+
+install-examples:
+	$(MKDIR_P) $(DESTDIR)$(datadir)/efl_mono/examples
+	cd $(srcdir) && $(install_sh_DATA) -c $(SRCS) $(EXTRA_FILES) $(DESTDIR)$(datadir)/efl_mono/examples
+
+uninstall-local:
+	for f in $(SRCS) $(EXTRA_FILES); do \
+	  rm -f $(DESTDIR)$(datadir)/efl_mono/examples/$$f ; \
+	done
+
+if ALWAYS_BUILD_EXAMPLES
+noinst_PROGRAMS = $(EXTRA_PROGRAMS)
+endif
+
+endif
diff --git a/src/examples/efl_mono/example_numberwrapper.c b/src/examples/efl_mono/example_numberwrapper.c
new file mode 100644
index 0000000000..f80dee616a
--- /dev/null
+++ b/src/examples/efl_mono/example_numberwrapper.c
@@ -0,0 +1,87 @@
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <Eo.h>
+
+#undef EOAPI
+#undef EAPI
+#define EOAPI EAPI EAPI_WEAK
+
+#ifdef _WIN32
+# ifdef EFL_EO_BUILD
+#  ifdef DLL_EXPORT
+#   define EAPI __declspec(dllexport)
+#  else
+#   define EAPI
+#  endif /* ! DLL_EXPORT */
+# else
+#  define EAPI __declspec(dllimport)
+# endif /* ! EFL_EO_BUILD */
+#else
+# ifdef __GNUC__
+#  if __GNUC__ >= 4
+#   define EAPI __attribute__ ((visibility("default")))
+#  else
+#   define EAPI
+#  endif
+# else
+#  define EAPI
+# endif
+#endif /* ! _WIN32 */
+
+#include "example_numberwrapper.eo.h"
+
+
+typedef struct Example_Numberwrapper_Data
+{
+   int number;
+   NumberCb cb;
+   void *cb_data;
+   Eina_Free_Cb free_cb;
+} Example_Numberwrapper_Data;
+
+// ##################### //
+// Example.Numberwrapper //
+// ##################### //
+
+
+void _example_numberwrapper_number_set(EINA_UNUSED Eo *obj, Example_Numberwrapper_Data *pd, int n)
+{
+   pd->number = n;
+}
+
+int _example_numberwrapper_number_get(EINA_UNUSED Eo *obj, Example_Numberwrapper_Data *pd)
+{
+   return pd->number;
+}
+
+
+void _example_numberwrapper_number_callback_set(EINA_UNUSED Eo *obj, Example_Numberwrapper_Data *pd, void *cb_data, NumberCb cb, Eina_Free_Cb cb_free_cb)
+{
+   if (pd->free_cb)
+      pd->free_cb(pd->cb_data);
+
+   pd->cb = cb;
+   pd->cb_data = cb_data;
+   pd->free_cb = cb_free_cb;
+}
+
+
+int _example_numberwrapper_callback_call(EINA_UNUSED Eo *obj, Example_Numberwrapper_Data *pd)
+{
+   if (!pd->cb)
+     {
+        static Eina_Error no_cb_err = 0;
+        if (!no_cb_err)
+          no_cb_err = eina_error_msg_static_register("Trying to call with no callback set");
+        eina_error_set(no_cb_err);
+        return -1;
+     }
+
+   return pd->cb(pd->cb_data, pd->number);
+}
+
+#include "example_numberwrapper.eo.c"
+
diff --git a/src/examples/efl_mono/example_numberwrapper.eo b/src/examples/efl_mono/example_numberwrapper.eo
new file mode 100644
index 0000000000..85f2ce4a4d
--- /dev/null
+++ b/src/examples/efl_mono/example_numberwrapper.eo
@@ -0,0 +1,30 @@
+function NumberCb {
+   params {
+      n: int;
+   }
+   return: int;
+};
+
+class Example.Numberwrapper (Efl.Object) {
+   methods {
+      @property number {
+         get {
+         }
+         set {
+         }
+         values {
+             n: int;
+         }
+      }
+
+      number_callback_set {
+         params {
+            cb: NumberCb;
+         }
+      }
+
+      callback_call {
+         return: int;
+      }
+   }
+}
diff --git a/src/examples/eina/EinaArray01.cs b/src/examples/eina/EinaArray01.cs
new file mode 100644
index 0000000000..4ac4a77812
--- /dev/null
+++ b/src/examples/eina/EinaArray01.cs
@@ -0,0 +1,41 @@
+using static System.Console;
+
+public class ExampleEinaArray01
+{
+    public static void Main()
+    {
+        eina.Config.Init();
+
+        var strings = new string[]{
+            "helo", "hera", "starbuck", "kat", "boomer",
+            "hotdog", "longshot", "jammer", "crashdown", "hardball",
+            "duck", "racetrack", "apolo", "husker", "freaker",
+            "skulls", "bulldog", "flat top", "hammerhead", "gonzo"
+        };
+
+        var array = new eina.Array<string>(20U);
+
+        // Push new elements
+        foreach (string s in strings)
+        {
+            WriteLine("push: " + s);
+            array.Push(s);
+        }
+
+        // Check count
+        WriteLine("array count: " + array.Count());
+
+        // Iterate over the array
+        int idx = 0;
+        foreach (string s in array)
+        {
+            WriteLine($"at[{idx}]: {s}");
+            ++idx;
+        }
+
+        // Remove one by one
+        while (array.Length != 0)
+            WriteLine("pop: " + array.Pop());
+    }
+}
+
diff --git a/src/examples/eina/EinaBinbuf01.cs b/src/examples/eina/EinaBinbuf01.cs
new file mode 100644
index 0000000000..395616879d
--- /dev/null
+++ b/src/examples/eina/EinaBinbuf01.cs
@@ -0,0 +1,65 @@
+using static System.Console;
+
+public class ExampleEinaBinbuf01
+{
+    public static void Main()
+    {
+        eina.Config.Init();
+
+        var bytes = new byte[]{0, 1, 2, 3, 4, 5, 6};
+
+        var bb = new eina.Binbuf();
+
+        // Append initial bytes
+        bb.Append(bytes);
+
+        WriteLine("Printing each byte.");
+
+        int idx = 0;
+        foreach (byte b in bb.GetBytes())
+        {
+            WriteLine($"byte at[{idx}]: {b}");
+            ++idx;
+        }
+
+        // Append more byte by byte
+        bb.Append((byte) 7);
+        bb.Append((byte) 8);
+        bb.Append((byte) 9);
+        bb.Append((byte) 0);
+
+        WriteLine("\nPrinting each byte.");
+
+        idx = 0;
+        foreach (byte b in bb.GetBytes())
+        {
+            WriteLine($"byte at[{idx}]: {b}");
+            ++idx;
+        }
+
+        // Remove some
+        bb.Remove(2, 5);
+
+        WriteLine("\nPrinting each byte.");
+
+        idx = 0;
+        foreach (byte b in bb.GetBytes())
+        {
+            WriteLine($"byte at[{idx}]: {b}");
+            ++idx;
+        }
+
+        // Insert new bytes in the middle
+        bb.Insert(new byte[]{22, 33, 44}, 2);
+
+        WriteLine("\nPrinting each byte.");
+
+        idx = 0;
+        foreach (byte b in bb.GetBytes())
+        {
+            WriteLine($"byte at[{idx}]: {b}");
+            ++idx;
+        }
+    }
+}
+
diff --git a/src/examples/eina/EinaError01.cs b/src/examples/eina/EinaError01.cs
new file mode 100644
index 0000000000..61af99508b
--- /dev/null
+++ b/src/examples/eina/EinaError01.cs
@@ -0,0 +1,75 @@
+using static System.Console;
+
+public class ExampleEinaError01
+{
+    private static bool RegisteredErrors = false;
+    private static eina.Error MyErrorNegative;
+    private static eina.Error MyErrorNull;
+
+    private static void testFunc(int n, string s)
+    {
+        if (!RegisteredErrors)
+        {
+            MyErrorNegative = eina.Error.Register("Negative number");
+            MyErrorNull = eina.Error.Register("NULL pointer");
+            RegisteredErrors = true;
+        }
+
+        if (n < 0)
+        {
+            eina.Error.Set(MyErrorNegative);
+            return;
+        }
+
+        if (s == null)
+        {
+            eina.Error.Set(MyErrorNull);
+            return;
+        }
+    }
+
+    public static void Main()
+    {
+        eina.Config.Init();
+        efl.eo.Config.Init();
+
+        // Handling Eina_Error with exception
+        try
+        {
+            testFunc(-1, "abc");
+            eina.Error.RaiseIfOccurred();
+        }
+        catch(efl.EflException e)
+        {
+            WriteLine($"Caught error: {e.Message}");
+        }
+
+        // Handling Eina_Error directly
+        testFunc(42, null);
+        eina.Error err = eina.Error.Get();
+        if (err != 0)
+        {
+            WriteLine($"Error set: {err.Message}");
+        }
+        eina.Error.Clear();
+
+        // No error set
+        try
+        {
+            testFunc(42, "abc");
+
+            eina.Error.RaiseIfOccurred();
+
+            err = eina.Error.Get();
+            WriteLine($"Really no error? {err == eina.Error.NO_ERROR}.");
+        }
+        catch
+        {
+            WriteLine("Unspected error!!!");
+        }
+
+        WriteLine("No error message is empty string: \"{0}\"", eina.Error.NO_ERROR.Message);
+        WriteLine("No error message is empty string: \"{0}\"", eina.Error.MsgGet(0));
+    }
+}
+
diff --git a/src/examples/eina/EinaHash01.cs b/src/examples/eina/EinaHash01.cs
new file mode 100644
index 0000000000..a645dde1ab
--- /dev/null
+++ b/src/examples/eina/EinaHash01.cs
@@ -0,0 +1,66 @@
+using static System.Console;
+
+public class ExampleEinaHash01
+{
+    public static void Main()
+    {
+        eina.Config.Init();
+
+        var phone_book = new eina.Hash<string, string>();
+
+        // Add initial entries to our hash
+        phone_book.Add("Wolfgang Amadeus Mozart", "+01 23 456-78910");
+        phone_book.Add("Ludwig van Beethoven", "+12 34 567-89101");
+        phone_book.Add("Richard Georg Strauss", "+23 45 678-91012");
+        phone_book.Add("Heitor Villa-Lobos", "+34 56 789-10123");
+
+        // Look for a specific entry and get its phone number
+        var entry_name = "Heitor Villa-Lobos";
+        var phone = phone_book.Find(entry_name);
+
+        WriteLine("Printing entry.");
+        WriteLine($"Name: {entry_name}");
+        WriteLine($"Number: {phone}\n");
+
+        // Delete this entry
+        var r = phone_book.DelByKey(entry_name);
+        WriteLine($"Hash entry successfully deleted? {r}!\n");
+
+        // Modify the pointer data of an entry and free the old one
+        phone_book.Modify("Richard Georg Strauss", "+23 45 111-11111");
+
+        // Modify or add an entry to the hash
+        // Let's first add a new entry
+        entry_name = "Raul Seixas";
+        phone_book[entry_name] = "+55 01 234-56789";
+        WriteLine("Printing entry.");
+        WriteLine($"Name: {entry_name}");
+        WriteLine($"Number: {phone_book[entry_name]}\n");
+
+        // Now change the phone number
+        phone_book["Raul Seixas"] = "+55 02 222-22222";
+        WriteLine("Printing entry.");
+        WriteLine($"Name: {entry_name}");
+        WriteLine($"Number: {phone_book[entry_name]}\n");
+
+        // Check how many items are in the phone book
+        WriteLine("There are {0} items in the hash.\n", phone_book.Count);
+
+        // Change the name (key) on an entry
+        phone_book.Move("Raul Seixas", "Alceu Valenca");
+        entry_name = "Alceu Valenca";
+        WriteLine("Printing entry.");
+        WriteLine($"Name: {entry_name}");
+        WriteLine($"Number: {phone_book[entry_name]}\n");
+
+        // Empty the phone book, but don't destroy it
+        phone_book.FreeBuckets();
+        WriteLine("There are {0} items in the hash.\n", phone_book.Count);
+
+        // Phone book could still be used, but we are freeing it since we are
+        // done for now
+        phone_book.Dispose();
+    }
+}
+
+
diff --git a/src/examples/elementary/efl_ui_slider_mono.cs b/src/examples/elementary/efl_ui_slider_mono.cs
new file mode 100644
index 0000000000..a5aff11547
--- /dev/null
+++ b/src/examples/elementary/efl_ui_slider_mono.cs
@@ -0,0 +1,63 @@
+using System;
+
+public class Example
+{
+    public static efl.ui.Button CreateButton(efl.Object parent,
+                                             string text,
+                                             int w, int h,
+                                             EventHandler callback) {
+        efl.ui.Button button = new efl.ui.ButtonConcrete(parent);
+        button.SetText(text);
+        button.SetSize(w, h);
+
+        button.CLICKED += callback;
+
+        return button;
+    }
+
+#if WIN32 // Passed to the C# compiler with -define:WIN32
+    // Mono on Windows by default uses multi-thread apartments for COM stuff while
+    // OLE - used by ecore win32 DnD requires single threading for COM.
+    [STAThreadAttribute()]
+#endif
+    public static void Main() {
+        efl.All.Init(efl.Components.Ui);
+
+        efl.ui.Win win = new efl.ui.WinConcrete(null);
+        win.SetText("Hello, C#!!");
+        win.SetAutohide(true);
+
+        efl.ui.Box_Flow box = new efl.ui.Box_FlowConcrete(win);
+
+        efl.ui.Button button = CreateButton(box, "Click to exit", 120, 30,
+                (object sender, EventArgs e) => {
+                    efl.ui.Config.Exit();
+                });
+
+        box.Pack(button);
+
+        efl.ui.Progressbar bar = new efl.ui.ProgressbarConcrete(box);
+        bar.SetSize(120, 30);
+
+        efl.ui.Slider slider = new efl.ui.SliderConcrete(box);
+        slider.SetSize(120, 30);
+
+        slider.CHANGED += (object sender, EventArgs e) => {
+            bar.SetRangeValue(slider.GetRangeValue());
+        };
+
+        box.Pack(bar);
+        box.Pack(slider);
+
+        button.SetVisible(true);
+        box.SetVisible(true);
+
+        win.SetSize(120, 90);
+        win.SetVisible(true);
+
+        efl.ui.Config.Run();
+
+        efl.All.Shutdown();
+    }
+
+}
diff --git a/src/examples/evas/evas_mono_box.cs b/src/examples/evas/evas_mono_box.cs
new file mode 100644
index 0000000000..cdc4b8b150
--- /dev/null
+++ b/src/examples/evas/evas_mono_box.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+
+public class MyBox : evas.BoxInherit
+{
+    public MyBox(efl.Object parent) : base(parent) {}
+
+    [DllImport("evas")] static extern void evas_obj_box_layout_vertical(IntPtr obj, IntPtr data, IntPtr privdata);
+    [DllImport("evas")] static extern void evas_obj_box_layout_horizontal(IntPtr obj, IntPtr data, IntPtr privdata);
+    [DllImport("evas")] static extern void evas_object_box_layout_horizontal(IntPtr obj, IntPtr data, IntPtr privdata);
+    [DllImport("evas")] static extern IntPtr evas_object_evas_get(IntPtr obj);
+    [DllImport("evas")] static extern void evas_event_freeze(IntPtr obj);
+    [DllImport("evas")] static extern void evas_event_thaw(IntPtr obj);
+    
+    override public void CalculateGroup()
+    {
+        IntPtr evas = evas_object_evas_get(raw_handle);
+        evas_event_freeze(evas);
+        Console.WriteLine("called group_calculate");
+        /* layouting_set(true); */
+        evas_obj_box_layout_vertical(raw_handle, IntPtr.Zero, IntPtr.Zero);
+        /* layouting_set(false); */
+        /* children_changed_set(false); */
+        evas_event_thaw(evas);
+    }
+}
+
+class TestMain
+{
+    static void Main(string[] args)
+    {
+        efl.All.Init();
+
+        efl.Loop loop = new efl.LoopConcrete();
+
+
+        EcoreEvas ecore_evas = new EcoreEvas();
+
+        efl.canvas.Object canvas = ecore_evas.canvas;
+        canvas.SetVisible(true);
+
+        efl.Object parent = canvas.GetParent();
+        System.Diagnostics.Debug.Assert(parent.raw_handle != IntPtr.Zero);
+
+        evas.Box box = new MyBox(canvas);
+        eina.Size2D size = new eina.Size2D();
+
+        size.W = 320;
+        size.H = 240;
+
+        box.SetSize(size);
+        box.SetVisible(true);
+
+        efl.canvas.Rectangle rect = new efl.canvas.RectangleConcrete(canvas);
+        rect.SetColor(0, 0, 255, 255);
+        size.W = 320;
+        size.H = 120;
+        rect.SetSize(size);
+        rect.SetVisible(true);
+        box.Append(rect);
+
+        efl.canvas.Rectangle rect2 = new efl.canvas.RectangleConcrete(canvas);
+        rect2.SetColor(0, 255, 0, 255);
+        rect2.SetSize(size);
+        rect2.SetVisible(true);
+        box.Append(rect2);
+
+        loop.Begin();
+
+        efl.All.Shutdown();
+    }
+}
diff --git a/src/examples/evas/evas_mono_image.cs b/src/examples/evas/evas_mono_image.cs
new file mode 100644
index 0000000000..ff84db5d9a
--- /dev/null
+++ b/src/examples/evas/evas_mono_image.cs
@@ -0,0 +1,93 @@
+using System;
+using System.Runtime.CompilerServices;
+
+class TestMain
+{
+    static int WIDTH = 320;
+    static int HEIGHT = 240;
+
+    evas.Image image;
+
+
+    static string ImagePath([CallerFilePath] string folder="")
+    {
+        return System.IO.Path.GetDirectoryName(folder);
+    }
+
+    public TestMain(evas.Image image)
+    {
+        this.image = image;
+    }
+
+    static void Main(string[] args)
+    {
+        efl.All.Init();
+
+        efl.Loop loop = new efl.LoopConcrete();
+
+        EcoreEvas ecore_evas = new EcoreEvas();
+        eina.Size2D size = new eina.Size2D();
+        
+        efl.canvas.Object canvas = ecore_evas.canvas;
+        canvas.SetVisible(true);
+
+        efl.Object parent = canvas.GetParent();
+        System.Diagnostics.Debug.Assert(parent.raw_handle != IntPtr.Zero);
+        
+        efl.canvas.Rectangle bg = new efl.canvas.RectangleConcrete(canvas);
+        bg.SetColor(255, 255, 255, 255);
+        size.W = WIDTH;
+        size.H = HEIGHT;
+        bg.SetSize(size);
+        bg.SetVisible(true);
+
+        string valid_path = args[0];
+        evas.Image image = new evas.ImageConcrete(canvas);
+        image.SetFile(valid_path, null);
+
+        /* FIXME evas-image uses error handling code from
+         * evas_object_image_load_error_get, which seems to be not available
+         * efl.image.load.State state = image.load_error_get(); */
+
+        // FIXME missing move
+        eina.Rect rect = new eina.Rect();
+
+        rect.X = 0;
+        rect.Y = 0;
+        rect.W = WIDTH / 2;
+        rect.H = HEIGHT / 2;
+        image.SetFill(rect);
+
+        size.W = WIDTH / 2;
+        size.H = HEIGHT / 2;
+        image.SetSize(size);
+        image.SetVisible(true);
+
+        rect = image.GetFill();
+        rect.Y -= 50;
+        rect.W += 100;
+        image.SetFill(rect);
+
+        TestMain listener = new TestMain(image);
+
+        // TODO handle key events in order to alter the image like the C
+        // example. Meanwhile, just set some w fill
+        /* EventListener callback = new EventListener(); */
+
+        /* bg.key_focus_set(true); */
+        /* bg.event_callback_priority_add(evas.Callback_Type.Key_down, */ 
+        /*         efl.Callback_Priority.Default, */
+        /*         callback, null); */
+
+        loop.Begin();
+
+        efl.All.Shutdown();
+    }
+
+    public void on_key_down(object sender, EventArgs e)
+    {
+        Console.WriteLine("on_key_down called");
+    }
+}
+
+
diff --git a/src/examples/evas/evas_mono_image2.cs b/src/examples/evas/evas_mono_image2.cs
new file mode 100644
index 0000000000..e2ae49f092
--- /dev/null
+++ b/src/examples/evas/evas_mono_image2.cs
@@ -0,0 +1,83 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+
+class TestMain
+{
+    static int WIDTH = 320;
+    static int HEIGHT = 240;
+
+
+    static void Main(string[] args)
+    {
+        efl.All.Init();
+
+        efl.Loop loop = new efl.LoopConcrete();
+
+        EcoreEvas ecore_evas = new EcoreEvas();
+
+        eina.Size2D size = new eina.Size2D();
+        eina.Position2D pos = new eina.Position2D();
+        
+        efl.canvas.Object canvas = ecore_evas.canvas;
+        canvas.SetVisible(true);
+
+        efl.canvas.Rectangle bg = new efl.canvas.RectangleConcrete(canvas);
+        bg.SetColor(255, 255, 255, 255);
+        pos.X = 0;
+        pos.Y = 0;
+        bg.SetPosition(pos);
+        size.W = WIDTH;
+        size.H = HEIGHT;
+        bg.SetSize(size);
+        bg.SetVisible(true);
+
+        string path = args[0];
+        evas.Image logo = new evas.ImageConcrete(canvas);
+        logo.SetFillAuto(true);
+
+        // TODO add preloaded support (depends on events)
+
+        logo.SetFile(path, null);
+        size.W = WIDTH / 2;
+        size.H = HEIGHT / 2;
+        logo.SetSize(size);
+
+        // TODO add a bunch of key/mouse handlers
+
+        logo.SetVisible(true);
+
+        int[] pixels = new int[(WIDTH/4) * (HEIGHT / 4)];
+        System.Random generator = new System.Random();
+        for (int i = 0; i < pixels.Length; i++) {
+            pixels[i] = generator.Next();
+        }
+
+        evas.Image noise_img = new evas.ImageConcrete(canvas);
+        size.W = WIDTH / 4;
+        size.H = HEIGHT / 4;
+        noise_img.SetSize(size);
+        // FIXME Add a way to set the pixels.
+        // noise_img.data_set(pixels);
+        noise_img.SetFillAuto(true);
+        pos.X = WIDTH * 5 / 8;
+        pos.Y = HEIGHT / 8;
+        noise_img.SetPosition(pos);
+        noise_img.SetVisible(true);
+        Console.WriteLine("Creating noise image with sizez %d, %d", WIDTH/4, HEIGHT/4);
+
+        efl.canvas.Proxy proxy_img = new efl.canvas.ProxyConcrete(canvas);
+        proxy_img.SetSource(noise_img);
+        pos.X = WIDTH / 2;
+        pos.Y = HEIGHT / 2;
+        proxy_img.SetPosition(pos);
+        size.W = WIDTH / 2;
+        size.H = HEIGHT / 2;
+        proxy_img.SetSize(size);
+        proxy_img.SetVisible(true);
+
+        loop.Begin();
+    }
+}
+
+
diff --git a/src/examples/evas/evas_mono_rectangle.cs b/src/examples/evas/evas_mono_rectangle.cs
new file mode 100644
index 0000000000..de686b0609
--- /dev/null
+++ b/src/examples/evas/evas_mono_rectangle.cs
@@ -0,0 +1,47 @@
+using System;
+
+class TestMain
+{
+    private static int[,] colors = new int[,] {
+        {255, 0, 0},
+        {0, 255, 0},
+        {0, 0, 255}
+    };
+
+    static void Main(string[] args)
+    {
+        int color_index = 0;
+
+        efl.All.Init();
+
+        efl.Loop loop = new efl.LoopConcrete();
+        EcoreEvas ecore_evas = new EcoreEvas();
+        efl.canvas.Object canvas = ecore_evas.canvas;
+        canvas.SetVisible(true);
+
+        efl.Object parent = canvas.GetParent();
+        System.Diagnostics.Debug.Assert(parent.raw_handle != IntPtr.Zero);
+
+        efl.canvas.Rectangle rect = new efl.canvas.RectangleConcrete(canvas);
+        rect.SetColor(colors[0, 0], colors[0, 1], colors[0, 2], 255);
+        eina.Size2D size = new eina.Size2D();
+        size.W = 640;
+        size.H = 480;
+        rect.SetSize(size);
+        rect.SetVisible(true);
+
+        canvas.KEY_DOWN += (object sender, efl.input.KEY_DOWN_Args e) => {
+            color_index = (color_index + 1) % 3;
+            Console.WriteLine("Key Down");
+            Console.WriteLine("Got key obj at {0}", e.arg.raw_handle.ToString("X"));
+            Console.WriteLine("Got key_get() == [{0}]", e.arg.GetKey());
+            rect.SetColor(colors[color_index, 0],
+                          colors[color_index, 1],
+                          colors[color_index, 2], 255);
+        };
+
+        loop.Begin();
+
+        efl.All.Shutdown();
+    }
+}
diff --git a/src/examples/evas/evas_mono_table.cs b/src/examples/evas/evas_mono_table.cs
new file mode 100644
index 0000000000..e79ad7c956
--- /dev/null
+++ b/src/examples/evas/evas_mono_table.cs
@@ -0,0 +1,77 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+
+class TestMain
+{
+    static int WIDTH = 100;
+    static int HEIGHT = 150;
+
+    static void Main(string[] args)
+    {
+        efl.All.Init();
+
+        efl.Loop loop = new efl.LoopConcrete();
+
+        EcoreEvas ecore_evas = new EcoreEvas();
+        
+        eina.Size2D size = new eina.Size2D();
+        size.W = WIDTH;
+        size.H = HEIGHT;
+
+        eina.Size2D hint = new eina.Size2D();
+
+        efl.canvas.Object canvas = ecore_evas.canvas;
+        canvas.SetVisible(true);
+
+        efl.Object parent = canvas.GetParent();
+        System.Diagnostics.Debug.Assert(parent.raw_handle != IntPtr.Zero);
+        
+        efl.canvas.Rectangle bg = new efl.canvas.RectangleConcrete(canvas);
+        bg.SetColor(255, 255, 255, 255);
+        bg.SetSize(size);
+        bg.SetVisible(true);
+
+
+        evas.Table table = new evas.TableConcrete(canvas);
+        table.SetHomogeneous(evas.object_table.Homogeneous_Mode.None);
+        table.SetPadding(0, 0);
+        table.SetSize(size);
+        table.SetVisible(true);
+
+        efl.canvas.Rectangle rect = new efl.canvas.RectangleConcrete(canvas);
+        rect.SetColor(255, 0, 0, 255);
+        hint.W = 100;
+        hint.H = 50;
+        rect.SetHintMin(hint);
+        rect.SetVisible(true);
+        table.Pack(rect, 1, 1, 2, 1);
+        
+        rect = new efl.canvas.RectangleConcrete(canvas);
+        rect.SetColor(0, 255, 0, 255);
+        hint.W = 50;
+        hint.H = 100;
+        rect.SetHintMin(hint);
+        rect.SetVisible(true);
+        table.Pack(rect, 1, 2, 1, 2);
+
+        rect = new efl.canvas.RectangleConcrete(canvas);
+        rect.SetColor(0, 0, 255, 255);
+        hint.W = 50;
+        hint.H = 50;
+        rect.SetHintMin(hint);
+        rect.SetVisible(true);
+        table.Pack(rect, 2, 2, 1, 1);
+
+        rect = new efl.canvas.RectangleConcrete(canvas);
+        rect.SetColor(255, 255, 0, 255);
+        rect.SetHintMin(hint);
+        rect.SetVisible(true);
+        table.Pack(rect, 2, 3, 1, 1);
+        
+        loop.Begin();
+
+        efl.All.Shutdown();
+    }
+}
+
diff --git a/src/examples/evas/evas_mono_text.cs b/src/examples/evas/evas_mono_text.cs
new file mode 100644
index 0000000000..071cba218b
--- /dev/null
+++ b/src/examples/evas/evas_mono_text.cs
@@ -0,0 +1,126 @@
+using System;
+using System.Linq;
+using System.Collections.Generic;
+
+static class Extensions
+{
+    public static IEnumerable<T> Circle<T>(this IEnumerable<T> list, int index=0)
+    {
+        var count = list.Count();
+        index = index % count;
+
+        while (true) {
+            yield return list.ElementAt(index);
+            index = (index + 1) % count;
+        }
+    }
+}
+
+class TestMain
+{
+    static int WIDTH = 320;
+    static int HEIGHT = 240;
+
+    private EcoreEvas ecore_evas;
+    private efl.canvas.Object canvas;
+    private efl.canvas.Rectangle bg;
+    private evas.Text text;
+    private evas.Image border;
+
+    public TestMain(String border_file) {
+        ecore_evas = new EcoreEvas();
+        eina.Size2D size = new eina.Size2D();
+        eina.Position2D position = new eina.Position2D();
+        canvas = ecore_evas.canvas;
+        canvas.SetVisible(true);
+
+        bg = new efl.canvas.RectangleConcrete(canvas);
+        bg.SetColor(255, 255, 255, 255);
+        position.X = 0;
+        position.Y = 0;
+        bg.SetPosition(position);
+        size.W = WIDTH;
+        size.H = HEIGHT;
+        bg.SetSize(size);
+        bg.SetVisible(true);
+        bg.SetKeyFocus(true);
+
+        bg.KEY_DOWN += On_KeyDown;
+
+        text = new evas.TextConcrete(canvas);
+        text.SetStyle(evas.Text_Style_Type.OutlineSoftShadow);
+
+        text.SetColor(0, 0, 0, 255);
+        text.SetGlowColor(255, 0, 0, 255);
+        text.SetOutlineColor(0, 0, 255, 255);
+        text.SetShadowColor(0, 255,255, 255);
+        text.SetFont("Courier", 30);
+
+        text.SetText("sample text");
+        size.W = 3*WIDTH / 4;
+        size.H = HEIGHT / 4;
+        text.SetSize(size);
+        position.X = WIDTH / 8;
+        position.Y = 3 * HEIGHT / 8;
+        text.SetPosition(position);
+        text.SetVisible(true);
+
+        efl.font.Size font_size = 0;
+        String font = String.Empty;
+        text.GetFont(out font, out font_size);
+        Console.WriteLine("Adding text object with font {0} and size {1}", font, size);
+
+        // setup border
+        border = new evas.ImageConcrete(canvas);
+        border.SetFile(border_file, null);
+        border.SetBorder(3, 3, 3, 3);
+        border.SetBorderCenterFill(0);
+
+        size.W = 3 * WIDTH / 4 + 3;
+        size.H = HEIGHT / 4 + 3;
+        border.SetSize(size);
+        position.X = WIDTH / 8 - 3;
+        position.Y = 3 * HEIGHT / 8 - 3;
+        border.SetPosition(position);
+        border.SetVisible(true);
+
+
+    }
+
+    private void On_KeyDown(object sender, efl.input.KEY_DOWN_Args e)
+    {
+        var key = e.arg.GetKey();
+
+        if (key == "h") {
+            Console.WriteLine(commands);
+        } else if (key == "t") {
+            evas.Text_Style_Type type = text.GetStyle();
+            type = (evas.Text_Style_Type)(((int)type + 1) % 10); // 10 hardcoded from C example
+            text.SetStyle(type);
+        }
+    }
+
+    static string commands = @"commands are:
+          t - change text's current style
+          h - print help";
+
+
+    static void Main(string[] args)
+    {
+        efl.All.Init();
+
+        String border_path = "./src/examples/evas/resources/images/red.png";
+
+        if (args.Length >= 1)
+            border_path = args[0];
+
+        efl.Loop loop = new efl.LoopConcrete();
+        TestMain t = new TestMain(border_path);
+
+        loop.Begin();
+
+        efl.All.Shutdown();
+    }
+}
+
+