Add QWidget.setParent()

src/cpp/include/nodegui/QtCore/QObject/qobject_macro.h

@@ -69,13 +69,34 @@
     Napi::Env env = info.Env();                                              \
     this->instance->dumpObjectInfo();                                        \
     return env.Null();                                                       \
+  }                                                                          \
+  Napi::Value __external_qobject__(const Napi::CallbackInfo& info) {         \
+    Napi::Env env = info.Env();                                              \
+    return Napi::External<QObject>::New(env, static_cast<QObject *>(this->instance)); \
+  }
+
+// Ideally this macro below should go in
+// QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE but some wrappers
+// need their own setParent()` implementation which handles different
+// arguments.
+#define QOBJECT_SET_PARENT_IMPL                                              \
+  Napi::Value setParent(const Napi::CallbackInfo& info) {                    \
+    Napi::Env env = info.Env();                                              \
+    if (info[0].IsNull()) {                                                  \
+      this->instance->setParent(nullptr);                                    \
+    } else {                                                                 \
+      QObject* parentObject = info[0].As<Napi::External<QObject>>().Data();  \
+      this->instance->setParent(parentObject);                               \
+    }                                                                        \
+    return env.Null();                                                       \
   }
 
 #endif  // QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE
 
 #ifndef QOBJECT_WRAPPED_METHODS_DECLARATION
 #define QOBJECT_WRAPPED_METHODS_DECLARATION \
-  QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE(this->instance.data())
+  QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE(this->instance.data()) \
+  QOBJECT_SET_PARENT_IMPL
 #endif  // QOBJECT_WRAPPED_METHODS_DECLARATION
 
 #ifndef QOBJECT_WRAPPED_METHODS_EXPORT_DEFINE
@@ -84,13 +105,15 @@
   EVENTWIDGET_WRAPPED_METHODS_EXPORT_DEFINE(ComponentWrapName)              \
                                                                             \
   InstanceMethod("__id__", &ComponentWrapName::__id__),                     \
+      InstanceMethod("__external_qobject__", &ComponentWrapName::__external_qobject__),   \
       InstanceMethod("inherits", &ComponentWrapName::inherits),             \
       InstanceMethod("setProperty", &ComponentWrapName::setProperty),       \
       InstanceMethod("property", &ComponentWrapName::property),             \
       InstanceMethod("setObjectName", &ComponentWrapName::setObjectName),   \
       InstanceMethod("objectName", &ComponentWrapName::objectName),         \
       InstanceMethod("dumpObjectTree", &ComponentWrapName::dumpObjectTree), \
-      InstanceMethod("dumpObjectInfo", &ComponentWrapName::dumpObjectInfo),
+      InstanceMethod("dumpObjectInfo", &ComponentWrapName::dumpObjectInfo), \
+      InstanceMethod("setParent", &ComponentWrapName::setParent),
 
 #endif  // QOBJECT_WRAPPED_METHODS_EXPORT_DEFINE
 
@@ -109,3 +132,5 @@
 #ifndef QOBJECT_SIGNALS
 #define QOBJECT_SIGNALS QOBJECT_SIGNALS_ON_TARGET(this)
 #endif  // QOBJECT_SIGNALS
+
+#include "QtCore/QObject/qobject_wrap.h"

src/cpp/include/nodegui/QtGui/QClipboard/qclipboard_wrap.h

@@ -13,6 +13,7 @@ class DLL_EXPORT QClipboardWrap : public Napi::ObjectWrap<QClipboardWrap>,
   QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE(this)
   // Note: We don't use EVENTWIDGET_IMPLEMENTATIONS() here because this class
   // doesn't handle any QEvents.
+  QOBJECT_SET_PARENT_IMPL
 
  private:
   QPointer<QClipboard> instance;

src/cpp/include/nodegui/QtGui/QScreen/qscreen_wrap.h

@@ -11,6 +11,8 @@
 class DLL_EXPORT QScreenWrap : public Napi::ObjectWrap<QScreenWrap>,
                                public EventWidget {
   QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE(this)
+  QOBJECT_SET_PARENT_IMPL
+
   // Note: We don't use EVENTWIDGET_IMPLEMENTATIONS() here because this class
   // doesn't handle any QEvents.
 

src/cpp/include/nodegui/QtGui/QWindow/qwindow_wrap.h

@@ -14,6 +14,17 @@ class DLL_EXPORT QWindowWrap : public Napi::ObjectWrap<QWindowWrap>,
   // Note: We don't use EVENTWIDGET_IMPLEMENTATIONS() here because this class
   // doesn't handle any QEvents.
 
+  // `QWindow` has a special setParent() which only accepts `QWindow`s
+  Napi::Value setParent(const Napi::CallbackInfo& info) {
+    Napi::Env env = info.Env();
+    QObject* parentObject = info[0].As<Napi::External<QObject>>().Data();
+    QWindow* parentWindow = qobject_cast<QWindow*>(parentObject);
+    if (parentWindow) {
+      this->instance->setParent(parentWindow);
+    }
+    return env.Null();
+  }
+
  private:
   QPointer<QWindow> instance;
 

src/cpp/include/nodegui/QtWidgets/QWidget/qwidget_macro.h

@@ -25,9 +25,22 @@
 #ifndef QWIDGET_WRAPPED_METHODS_DECLARATION
 #define QWIDGET_WRAPPED_METHODS_DECLARATION                                   \
                                                                               \
-  QOBJECT_WRAPPED_METHODS_DECLARATION                                         \
+  QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE(this->instance.data()) \
   YOGAWIDGET_WRAPPED_METHODS_DECLARATION                                      \
                                                                               \
+  Napi::Value setParent(const Napi::CallbackInfo& info) {                     \
+    Napi::Env env = info.Env();                                               \
+    if (info[0].IsNull()) {                                                   \
+      this->instance->setParent(nullptr);                                     \
+    } else {                                                                  \
+      QObject* parentObject = info[0].As<Napi::External<QObject>>().Data();   \
+      QWidget* parentWidget = qobject_cast<QWidget*>(parentObject);           \
+      if (parentWidget) {                                                     \
+        this->instance->setParent(parentWidget);                              \
+      }                                                                       \
+    }                                                                         \
+    return env.Null();                                                        \
+  }                                                                           \
   Napi::Value show(const Napi::CallbackInfo& info) {                          \
     Napi::Env env = info.Env();                                               \
     this->instance->show();                                                   \

src/cpp/include/nodegui/test/cachetestqobject_wrap.h

@@ -12,6 +12,7 @@ class DLL_EXPORT CacheTestQObjectWrap
     : public Napi::ObjectWrap<CacheTestQObjectWrap>,
       public EventWidget {
   QOBJECT_WRAPPED_METHODS_DECLARATION_WITH_EVENT_SOURCE(this)
+  QOBJECT_SET_PARENT_IMPL
 
  private:
   QPointer<CacheTestQObject> instance;

src/lib/QtCore/QObject.ts

@@ -27,6 +27,14 @@ export abstract class NodeObject<Signals extends QObjectSignals> extends EventWi
     dumpObjectInfo(): void {
         this.native.dumpObjectInfo();
     }
+    setParent(parent: NodeObject<QObjectSignals>): void {
+        if (parent != null) {
+            const extern = parent.native.__external_qobject__();
+            this.native.setParent(extern);
+        } else {
+            this.native.setParent(null);
+        }
+    }
 }
 
 export interface QObjectSignals {