add cpp-lib example; some fixes

cpp-lib/cpp/cpp.pro

@@ -0,0 +1,14 @@
+QT          += core
+TEMPLATE    = lib
+CONFIG      += plugin release
+DESTDIR     = ../
+TARGET      = cpp
+OBJECTS_DIR = ./tmp/
+MOC_DIR     = ./tmp/
+
+win32 {
+  include(../../src/windows.pri)
+}
+
+HEADERS += lib.h
+SOURCES += lib.cpp

cpp-lib/cpp/lib.cpp

@@ -0,0 +1,27 @@
+#include "lib.h"
+#include <QtDebug>
+
+QT_BEGIN_NAMESPACE
+
+QObject* ini() {
+  // any QObject inherited class will do
+  static QObject* cpp = 0;
+  if(!cpp) {
+    cpp = new CPP;
+  }
+  return cpp;
+}
+
+// insert here your function implementations
+
+QVariant CPP::hello(const QVariant& arg) {
+  QString msg;
+  QDebug debug(&msg);
+  debug << arg;
+
+  qDebug() << "hello" << arg;
+
+  return arg;
+}
+
+QT_END_NAMESPACE

cpp-lib/cpp/lib.h

@@ -0,0 +1,28 @@
+#ifndef LIB_H
+#define LIB_H
+
+#include <QtCore>
+
+#ifdef Q_CC_MSVC
+#define LIB_EXPORT __declspec(dllexport)
+#else
+#define LIB_EXPORT
+#endif
+
+QT_BEGIN_NAMESPACE
+
+extern "C" { LIB_EXPORT QObject* ini(); }
+
+class CPP : public QObject
+{
+  Q_OBJECT
+
+public:
+  // max. 10 arguments of type QVariant
+  // return type must also be a QVariant
+  Q_INVOKABLE QVariant hello(const QVariant&);
+};
+
+QT_END_NAMESPACE
+
+#endif

cpp-lib/readme.md

@@ -0,0 +1,39 @@
+
+Build
+-----
+
+Switch to `cpp/` and do:
+```
+qmake lib.pro
+make
+```
+
+
+Run
+---
+
+```
+$ lqml ~/slime/qml-start-swank.lisp
+$ emacs
+```
+
+In Slime do:
+```
+(defvar *cpp* (qload-c++ "cpp"))
+
+(define-qt-wrappers *cpp*)
+
+(hello *cpp* '(1 "two" (1.25 #(50 -50 75))))
+```
+Now look at the console output where you launched the `lqml` executable.
+
+As you can see, although the argument and return type are simply defined as
+`QVariant`, you may also pass lists, because a `QVariant` can also be of type
+`QVariantList`, so this is a perfect fit for (nested) Lisp lists.
+
+So, we pass a nested Lisp list, and it gets printed on Qt side with the
+respective types. Then the `QVariantList` is returend to Lisp, where it is
+automatically converted back to a nested Lisp list.
+
+Realy convenient!
+

cpp-lib/run.lisp

@@ -0,0 +1,6 @@
+(defvar *cpp* (qload-c++ "cpp"))
+
+(define-qt-wrappers *cpp*)
+
+(print (hello *cpp* '(1 "two" (1.25 #(50 -50 75)))))
+

doc/help.htm

@@ -24,6 +24,16 @@
     (define-qt-wrappers *c++*)                ; Lisp wrapper functions
 
 
+<b>define-qt-wrappers (qt-library &rest what)</b>
+
+  Defines Lisp methods for all Qt methods/signals/slots of given library,
+  previously loaded with QLOAD-C++.
+
+    (define-qt-wrappers *c++*)          ; generate wrappers
+    (define-qt-wrappers *c++* :methods) ; Qt methods only (no slots/signals)
+    (my-qt-function *c++* x y)          ; call from Lisp
+
+
 <b>find-quick-item (object-name)</b>
 
   Finds the first QQuickItem matching OBJECT-NAME. Locally set *ROOT-ITEM* if
@@ -125,7 +135,8 @@
 
   Fast and convenient way to call JS functions defined in QML. You may pass
   up to 10 arguments of the following types:
-  T, NIL, INTEGER, FLOAT, STRING, and (nested) lists of mentioned arguments.
+  T, NIL, INTEGER, FLOAT, STRING, VECTOR of octets, and (nested) lists of
+  mentioned arguments.
   N.B: Does not work with JS default arguments.
 
 

readme.md

@@ -27,5 +27,4 @@ TODO
 * make example work on iOS
 * add item model example
 * add sokoban example
-* add cpp-lib example
 

src/cpp/ecl_ext.cpp

@@ -250,7 +250,8 @@ cl_object qload_cpp(cl_object l_lib_name, cl_object l_unload) { /// qload-c++
     if (ini) {
       QObject* main = ini();
       if (main) {
-        ecl_return1(ecl_process_env(), ECL_T);
+        cl_object l_ret = from_qobject_pointer(main);
+        ecl_return1(ecl_process_env(), l_ret);
       }
     }
   }
@@ -391,8 +392,9 @@ cl_object qlog2(cl_object l_msg) {
 cl_object qinvoke_method2(cl_object l_obj, cl_object l_name, cl_object l_args) {
   // for internal use: this is used to call user defined JS functions, and to
   // call user defined Qt/C++ plugin functions.
-  // Max. 10 arguments of type T, NIL, INTEGER, FLOAT, STRING, (nested) LIST of
-  // mentioned arguments. On Qt side, only QVariant arguments are allowed.
+  // Max. 10 arguments of type T, NIL, INTEGER, FLOAT, STRING, VECTOR of
+  // octets, (nested) LIST of mentioned arguments. On Qt side, only QVariant
+  // arguments are allowed.
   // N.B. does not support default arguments, if used to call JS functions
   ecl_process_env()->nvalues = 1;
   const int MAX = 10;

src/cpp/marshal.cpp

@@ -132,6 +132,7 @@ TO_QT_FLOAT_4 (QRectF)
 QVariant toQVariant(cl_object l_arg, int type) {
   QVariant var;
   switch (type) {
+    case QMetaType::QByteArray: var = toQByteArray(l_arg); break;
     case QMetaType::QPointF:    var = toQPointF(l_arg);    break;
     case QMetaType::QRectF:     var = toQRectF(l_arg);     break;
     case QMetaType::QSizeF:     var = toQSizeF(l_arg);     break;
@@ -154,6 +155,9 @@ QVariant toQVariant(cl_object l_arg, int type) {
     else if (cl_listp(l_arg) == ECL_T) {                // list
       var = QVariant::fromValue(toQVariantList(l_arg));
     }
+    else if (cl_vectorp(l_arg) == ECL_T) {              // vector (of octets)
+      var = QVariant(toQByteArray(l_arg));
+    }
     else {                                              // default: undefined
       var = QVariant();
     }

src/lisp/ini.lisp

@@ -116,7 +116,8 @@
     (define-qt-wrappers *c++*)          ; generate wrappers
     (define-qt-wrappers *c++* :methods) ; Qt methods only (no slots/signals)
     (my-qt-function *c++* x y)          ; call from Lisp"
-  (let ((all-functions (qapropos* nil (ensure-qt-object qt-library)))
+  (assert (qobject-p qt-library))
+  (let ((all-functions (qapropos* nil qt-library))
         (lispify (not (find :do-not-lispify what))))
     (setf what (remove-if (lambda (x) (find x '(:do-not-lispify t)))
                           what))
@@ -142,7 +143,7 @@
             ;; there seems to be no simple way to avoid EVAL here
             ;; (excluding non-portable hacks)
             (eval `(defgeneric ,lisp-name (object &rest arguments)))
-            (eval `(defmethod ,lisp-name ((object qt-object) &rest arguments)
+            (eval `(defmethod ,lisp-name ((object si:foreign-data) &rest arguments)
                      (%qinvoke-method object ,qt-name arguments)))))))))
 
 (defun qinvoke-method (object function-name &rest arguments)

src/lisp/package.lisp

@@ -7,6 +7,7 @@
    #:*root-item*
    #:*caller*
    #:children
+   #:define-qt-wrappers
    #:find-quick-item
    #:js
    #:make-qobject

src/lisp/qml.lisp

@@ -179,7 +179,8 @@
   "args: (method-name item/name &rest arguments
   Fast and convenient way to call JS functions defined in QML. You may pass
   up to 10 arguments of the following types:
-  T, NIL, INTEGER, FLOAT, STRING, and (nested) lists of mentioned arguments.
+  T, NIL, INTEGER, FLOAT, STRING, VECTOR of octets, and (nested) lists of
+  mentioned arguments.
   N.B: Does not work with JS default arguments."
   `(qrun* (qfun (quick-item ,item/name)
                 ,(if (symbolp method-name)