More GObject boilerplate reduction

(bzr r13341.1.175)

17 files changed, 103 insertions, 459 deletions

diff --git a/src/display/canvas-arena.cpp b/src/display/canvas-arena.cpp
index e82b1b1c7..8738b93e4 100644
--- a/src/display/canvas-arena.cpp
+++ b/src/display/canvas-arena.cpp
@@ -30,8 +30,6 @@ enum {
     LAST_SIGNAL
 };
 
-static void sp_canvas_arena_class_init(SPCanvasArenaClass *klass);
-static void sp_canvas_arena_init(SPCanvasArena *group);
 static void sp_canvas_arena_destroy(SPCanvasItem *object);
 
 static void sp_canvas_arena_item_deleted(SPCanvasArena *arena, Inkscape::DrawingItem *item);
@@ -46,7 +44,6 @@ static gint sp_canvas_arena_send_event (SPCanvasArena *arena, GdkEvent *event);
 static void sp_canvas_arena_request_update (SPCanvasArena *ca, DrawingItem *item);
 static void sp_canvas_arena_request_render (SPCanvasArena *ca, Geom::IntRect const &area);
 
-static SPCanvasItemClass *parent_class;
 static guint signals[LAST_SIGNAL] = {0};
 
 struct CachePrefObserver : public Inkscape::Preferences::Observer {
@@ -70,33 +67,13 @@ struct CachePrefObserver : public Inkscape::Preferences::Observer {
     SPCanvasArena *_arena;
 };
 
-GType
-sp_canvas_arena_get_type (void)
-{
-    static GType type = 0;
-    if (!type) {
-	GTypeInfo info = {
-            sizeof (SPCanvasArenaClass),
-	    NULL, NULL,
-            (GClassInitFunc) sp_canvas_arena_class_init,
-	    NULL, NULL,
-            sizeof (SPCanvasArena),
-	    0,
-            (GInstanceInitFunc) sp_canvas_arena_init,
-	    NULL
-	};
-        type = g_type_register_static (SP_TYPE_CANVAS_ITEM, "SPCanvasArena", &info, (GTypeFlags)0);
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPCanvasArena, sp_canvas_arena, SP_TYPE_CANVAS_ITEM);
 
 static void
 sp_canvas_arena_class_init (SPCanvasArenaClass *klass)
 {
     SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
 
-    parent_class = (SPCanvasItemClass*)g_type_class_peek_parent (klass);
-
     signals[ARENA_EVENT] = g_signal_new ("arena_event",
                                            G_TYPE_FROM_CLASS(item_class),
                                            G_SIGNAL_RUN_LAST,
@@ -149,8 +126,8 @@ static void sp_canvas_arena_destroy(SPCanvasItem *object)
     delete arena->observer;
     arena->drawing.~Drawing();
 
-    if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)
-        (* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(sp_canvas_arena_parent_class)->destroy)
+        SP_CANVAS_ITEM_CLASS(sp_canvas_arena_parent_class)->destroy(object);
 }
 
 static void
@@ -158,8 +135,8 @@ sp_canvas_arena_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned
 {
     SPCanvasArena *arena = SP_CANVAS_ARENA (item);
 
-    if (((SPCanvasItemClass *) parent_class)->update)
-        (* ((SPCanvasItemClass *) parent_class)->update) (item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(sp_canvas_arena_parent_class)->update)
+        SP_CANVAS_ITEM_CLASS(sp_canvas_arena_parent_class)->update(item, affine, flags);
 
     arena->ctx.ctm = affine;
 
diff --git a/src/display/canvas-bpath.cpp b/src/display/canvas-bpath.cpp
index ee9e14f10..328409e12 100644
--- a/src/display/canvas-bpath.cpp
+++ b/src/display/canvas-bpath.cpp
@@ -27,42 +27,18 @@
 #include "helper/geom.h"
 #include "display/sp-canvas.h"
 
-static void sp_canvas_bpath_class_init (SPCanvasBPathClass *klass);
-static void sp_canvas_bpath_init (SPCanvasBPath *path);
 static void sp_canvas_bpath_destroy(SPCanvasItem *object);
 
 static void sp_canvas_bpath_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 static void sp_canvas_bpath_render (SPCanvasItem *item, SPCanvasBuf *buf);
 static double sp_canvas_bpath_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item);
 
-static SPCanvasItemClass *parent_class;
-
-GType
-sp_canvas_bpath_get_type (void)
-{
-    static GType type = 0;
-    if (!type) {
-	GTypeInfo info = {
-            sizeof (SPCanvasBPathClass),
-	    NULL, NULL,
-            (GClassInitFunc) sp_canvas_bpath_class_init,
-	    NULL, NULL,
-            sizeof (SPCanvasBPath),
-	    0,
-            (GInstanceInitFunc) sp_canvas_bpath_init,
-	    NULL
-	};
-        type = g_type_register_static (SP_TYPE_CANVAS_ITEM, "SPCanvasBPath", &info, (GTypeFlags)0);
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPCanvasBPath, sp_canvas_bpath, SP_TYPE_CANVAS_ITEM);
 
 static void sp_canvas_bpath_class_init(SPCanvasBPathClass *klass)
 {
     SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
 
-    parent_class = (SPCanvasItemClass*)g_type_class_peek_parent (klass);
-
     item_class->destroy = sp_canvas_bpath_destroy;
     item_class->update = sp_canvas_bpath_update;
     item_class->render = sp_canvas_bpath_render;
@@ -90,8 +66,8 @@ static void sp_canvas_bpath_destroy(SPCanvasItem *object)
         cbp->curve = cbp->curve->unref();
     }
 
-    if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)
-        (* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(sp_canvas_bpath_parent_class)->destroy)
+        (* SP_CANVAS_ITEM_CLASS(sp_canvas_bpath_parent_class)->destroy) (object);
 }
 
 static void sp_canvas_bpath_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags)
@@ -100,8 +76,8 @@ static void sp_canvas_bpath_update(SPCanvasItem *item, Geom::Affine const &affin
 
     item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
 
-    if (reinterpret_cast<SPCanvasItemClass *>(parent_class)->update) {
-        reinterpret_cast<SPCanvasItemClass *>(parent_class)->update(item, affine, flags);
+    if (reinterpret_cast<SPCanvasItemClass *>(sp_canvas_bpath_parent_class)->update) {
+        reinterpret_cast<SPCanvasItemClass *>(sp_canvas_bpath_parent_class)->update(item, affine, flags);
     }
 
     sp_canvas_item_reset_bounds (item);
diff --git a/src/display/canvas-grid.cpp b/src/display/canvas-grid.cpp
index 4b1dbd1ed..2eeaa7006 100644
--- a/src/display/canvas-grid.cpp
+++ b/src/display/canvas-grid.cpp
@@ -71,42 +71,16 @@ static gchar const *const grid_svgname[] = {
 
 // ##########################################################
 // Grid CanvasItem
-static void grid_canvasitem_class_init (GridCanvasItemClass *klass);
-static void grid_canvasitem_init (GridCanvasItem *grid);
 static void grid_canvasitem_destroy(SPCanvasItem *object);
 static void grid_canvasitem_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 static void grid_canvasitem_render (SPCanvasItem *item, SPCanvasBuf *buf);
 
-static SPCanvasItemClass * parent_class;
-
-GType
-grid_canvasitem_get_type (void)
-{
-    static GType grid_canvasitem_type = 0;
-
-    if (!grid_canvasitem_type) {
-	GTypeInfo grid_canvasitem_info = {
-            sizeof (GridCanvasItemClass),
-	    NULL, NULL,
-            (GClassInitFunc) grid_canvasitem_class_init,
-	    NULL, NULL,
-            sizeof (GridCanvasItem),
-	    0,
-            (GInstanceInitFunc) grid_canvasitem_init,
-	    NULL
-	};
-        
-	grid_canvasitem_type = g_type_register_static(SPCanvasItem::getType(), "GridCanvasItem", &grid_canvasitem_info, GTypeFlags(0));
-    }
-    return grid_canvasitem_type;
-}
+G_DEFINE_TYPE(GridCanvasItem, grid_canvasitem, SP_TYPE_CANVAS_ITEM);
 
 static void grid_canvasitem_class_init(GridCanvasItemClass *klass)
 {
     SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
 
-    parent_class = (SPCanvasItemClass*)g_type_class_peek_parent (klass);
-
     item_class->destroy = grid_canvasitem_destroy;
     item_class->update = grid_canvasitem_update;
     item_class->render = grid_canvasitem_render;
@@ -123,8 +97,8 @@ static void grid_canvasitem_destroy(SPCanvasItem *object)
     g_return_if_fail (object != NULL);
     g_return_if_fail (INKSCAPE_IS_GRID_CANVASITEM (object));
 
-    if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)
-        (* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->destroy)
+        (* SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->destroy) (object);
 }
 
 /**
@@ -145,8 +119,8 @@ grid_canvasitem_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned
 {
     GridCanvasItem *gridcanvasitem = INKSCAPE_GRID_CANVASITEM (item);
 
-    if (parent_class->update)
-        (* parent_class->update) (item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->update)
+        SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->update(item, affine, flags);
 
     if (gridcanvasitem->grid) {
         gridcanvasitem->grid->Update(affine, flags);
diff --git a/src/display/canvas-text.cpp b/src/display/canvas-text.cpp
index fe60d9c65..88812af0a 100644
--- a/src/display/canvas-text.cpp
+++ b/src/display/canvas-text.cpp
@@ -26,42 +26,17 @@
 #include "color.h"
 #include "display/sp-canvas.h"
 
-static void sp_canvastext_class_init (SPCanvasTextClass *klass);
-static void sp_canvastext_init (SPCanvasText *canvastext);
 static void sp_canvastext_destroy(SPCanvasItem *object);
 
 static void sp_canvastext_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 static void sp_canvastext_render (SPCanvasItem *item, SPCanvasBuf *buf);
 
-static SPCanvasItemClass *parent_class_ct;
-
-GType
-sp_canvastext_get_type (void)
-{
-    static GType type = 0;
-
-    if (!type) {
-        GTypeInfo info = {
-            sizeof (SPCanvasTextClass),
-            NULL, NULL,
-            (GClassInitFunc) sp_canvastext_class_init,
-            NULL, NULL,
-            sizeof (SPCanvasText),
-            0,
-            (GInstanceInitFunc) sp_canvastext_init,
-            NULL
-        };
-        type = g_type_register_static (SP_TYPE_CANVAS_ITEM, "SPCanvasText", &info, (GTypeFlags)0);
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPCanvasText, sp_canvastext, SP_TYPE_CANVAS_ITEM);
 
 static void sp_canvastext_class_init(SPCanvasTextClass *klass)
 {
     SPCanvasItemClass *item_class = SP_CANVAS_ITEM_CLASS(klass);
 
-    parent_class_ct = SP_CANVAS_ITEM_CLASS(g_type_class_peek_parent(klass));
-
     item_class->destroy = sp_canvastext_destroy;
     item_class->update = sp_canvastext_update;
     item_class->render = sp_canvastext_render;
@@ -101,8 +76,8 @@ static void sp_canvastext_destroy(SPCanvasItem *object)
     canvastext->text = NULL;
     canvastext->item = NULL;
 
-    if (SP_CANVAS_ITEM_CLASS(parent_class_ct)->destroy)
-        (* SP_CANVAS_ITEM_CLASS(parent_class_ct)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(sp_canvastext_parent_class)->destroy)
+        SP_CANVAS_ITEM_CLASS(sp_canvastext_parent_class)->destroy(object);
 }
 
 static void
@@ -151,8 +126,8 @@ sp_canvastext_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned i
 
     item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
 
-    if (parent_class_ct->update)
-        (* parent_class_ct->update) (item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(sp_canvastext_parent_class)->update)
+        SP_CANVAS_ITEM_CLASS(sp_canvastext_parent_class)->update(item, affine, flags);
 
     sp_canvas_item_reset_bounds (item);
 
diff --git a/src/display/gnome-canvas-acetate.cpp b/src/display/gnome-canvas-acetate.cpp
index 2cd0f296d..9147a1bbf 100644
--- a/src/display/gnome-canvas-acetate.cpp
+++ b/src/display/gnome-canvas-acetate.cpp
@@ -15,40 +15,17 @@
 
 #include "gnome-canvas-acetate.h"
 
-static void sp_canvas_acetate_class_init (SPCanvasAcetateClass *klass);
-static void sp_canvas_acetate_init (SPCanvasAcetate *acetate);
 static void sp_canvas_acetate_destroy(SPCanvasItem *object);
 
 static void sp_canvas_acetate_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 static double sp_canvas_acetate_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item);
 
-static SPCanvasItemClass *parent_class;
-
-GType sp_canvas_acetate_get_type (void)
-{
-	static GType acetate_type = 0;
-	if (!acetate_type) {
-		GTypeInfo acetate_info = {
-			sizeof (SPCanvasAcetateClass),
-			NULL, NULL,
-			(GClassInitFunc) sp_canvas_acetate_class_init,
-			NULL, NULL,
-			sizeof (SPCanvasAcetate),
-			0,
-			(GInstanceInitFunc) sp_canvas_acetate_init,
-			NULL
-		};
-		acetate_type = g_type_register_static(SPCanvasItem::getType(), "SPCanvasAcetate", &acetate_info, GTypeFlags(0));
-	}
-	return acetate_type;
-}
+G_DEFINE_TYPE(SPCanvasAcetate, sp_canvas_acetate, SP_TYPE_CANVAS_ITEM);
 
 static void sp_canvas_acetate_class_init (SPCanvasAcetateClass *klass)
 {
 	SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
 
-	parent_class = (SPCanvasItemClass*)g_type_class_peek_parent (klass);
-
 	item_class->destroy = sp_canvas_acetate_destroy;
 	item_class->update = sp_canvas_acetate_update;
 	item_class->point = sp_canvas_acetate_point;
@@ -64,8 +41,8 @@ static void sp_canvas_acetate_destroy(SPCanvasItem *object)
 	g_return_if_fail (object != NULL);
 	g_return_if_fail (GNOME_IS_CANVAS_ACETATE (object));
 
-	if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)
-		(* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);
+	if (SP_CANVAS_ITEM_CLASS(sp_canvas_acetate_parent_class)->destroy)
+	    SP_CANVAS_ITEM_CLASS(sp_canvas_acetate_parent_class)->destroy(object);
 }
 
 static void sp_canvas_acetate_update( SPCanvasItem *item, Geom::Affine const &/*affine*/, unsigned int /*flags*/ )
diff --git a/src/display/guideline.cpp b/src/display/guideline.cpp
index 55c1ee495..44bbd14bd 100644
--- a/src/display/guideline.cpp
+++ b/src/display/guideline.cpp
@@ -29,8 +29,6 @@
 
 using Inkscape::ControlManager;
 
-static void sp_guideline_class_init(SPGuideLineClass *c);
-static void sp_guideline_init(SPGuideLine *guideline);
 static void sp_guideline_destroy(SPCanvasItem *object);
 
 static void sp_guideline_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
@@ -40,34 +38,10 @@ static double sp_guideline_point(SPCanvasItem *item, Geom::Point p, SPCanvasItem
 
 static void sp_guideline_drawline (SPCanvasBuf *buf, gint x0, gint y0, gint x1, gint y1, guint32 rgba);
 
-static SPCanvasItemClass *parent_class;
-
-GType sp_guideline_get_type()
-{
-    static GType guideline_type = 0;
-
-    if (!guideline_type) {
-        static GTypeInfo const guideline_info = {
-            sizeof (SPGuideLineClass),
-            NULL, NULL,
-            (GClassInitFunc) sp_guideline_class_init,
-            NULL, NULL,
-            sizeof (SPGuideLine),
-            16,
-            (GInstanceInitFunc) sp_guideline_init,
-            NULL,
-        };
-
-        guideline_type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPGuideLine", &guideline_info, (GTypeFlags) 0);
-    }
-
-    return guideline_type;
-}
+G_DEFINE_TYPE(SPGuideLine, sp_guideline, SP_TYPE_CANVAS_ITEM);
 
 static void sp_guideline_class_init(SPGuideLineClass *c)
 {
-    parent_class = SP_CANVAS_ITEM_CLASS(g_type_class_peek_parent(c));
-
     SPCanvasItemClass *item_class = SP_CANVAS_ITEM_CLASS(c);
     item_class->destroy = sp_guideline_destroy;
     item_class->update = sp_guideline_update;
@@ -108,7 +82,7 @@ static void sp_guideline_destroy(SPCanvasItem *object)
         g_free(gl->label);
     }
 
-    SP_CANVAS_ITEM_CLASS(parent_class)->destroy(object);
+    SP_CANVAS_ITEM_CLASS(sp_guideline_parent_class)->destroy(object);
 }
 
 static void sp_guideline_render(SPCanvasItem *item, SPCanvasBuf *buf)
@@ -197,8 +171,8 @@ static void sp_guideline_update(SPCanvasItem *item, Geom::Affine const &affine,
 {
     SPGuideLine *gl = SP_GUIDELINE(item);
 
-    if ((SP_CANVAS_ITEM_CLASS(parent_class))->update) {
-        (SP_CANVAS_ITEM_CLASS(parent_class))->update(item, affine, flags);
+    if ((SP_CANVAS_ITEM_CLASS(sp_guideline_parent_class))->update) {
+        (SP_CANVAS_ITEM_CLASS(sp_guideline_parent_class))->update(item, affine, flags);
     }
 
     gl->affine = affine;
diff --git a/src/display/sodipodi-ctrl.cpp b/src/display/sodipodi-ctrl.cpp
index 3636319df..327fbce1f 100644
--- a/src/display/sodipodi-ctrl.cpp
+++ b/src/display/sodipodi-ctrl.cpp
@@ -25,9 +25,6 @@ enum {
     ARG_PIXBUF
 };
 
-
-static void sp_ctrl_class_init (SPCtrlClass *klass);
-static void sp_ctrl_init (SPCtrl *ctrl);
 static void sp_ctrl_destroy(SPCanvasItem *object);
 static void sp_ctrl_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
 static void sp_ctrl_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
@@ -36,29 +33,7 @@ static void sp_ctrl_render (SPCanvasItem *item, SPCanvasBuf *buf);
 
 static double sp_ctrl_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item);
 
-static SPCanvasItemClass *parent_class;
-
-GType
-sp_ctrl_get_type (void)
-{
-    static GType ctrl_type = 0;
-    if (!ctrl_type) {
-        static GTypeInfo const ctrl_info = {
-            sizeof (SPCtrlClass),
-            NULL,   /* base_init */
-            NULL,   /* base_finalize */
-            (GClassInitFunc) sp_ctrl_class_init,
-            NULL,   /* class_finalize */
-            NULL,   /* class_data */
-            sizeof (SPCtrl),
-            0,   /* n_preallocs */
-            (GInstanceInitFunc) sp_ctrl_init,
-            NULL
-        };
-        ctrl_type = g_type_register_static (SP_TYPE_CANVAS_ITEM, "SPCtrl", &ctrl_info, (GTypeFlags)0);
-    }
-    return ctrl_type;
-}
+G_DEFINE_TYPE(SPCtrl, sp_ctrl, SP_TYPE_CANVAS_ITEM);
 
 static void
 sp_ctrl_class_init (SPCtrlClass *klass)
@@ -66,8 +41,6 @@ sp_ctrl_class_init (SPCtrlClass *klass)
     SPCanvasItemClass *item_class = SP_CANVAS_ITEM_CLASS(klass);
     GObjectClass *g_object_class = (GObjectClass *) klass;
 
-    parent_class = SP_CANVAS_ITEM_CLASS(g_type_class_peek_parent (klass));
-
     g_object_class->set_property = sp_ctrl_set_property;
     g_object_class->get_property = sp_ctrl_get_property;
 
@@ -239,8 +212,8 @@ static void sp_ctrl_destroy(SPCanvasItem *object)
         ctrl->cache = NULL;
     }
 
-    if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)
-        (* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrl_parent_class)->destroy)
+        SP_CANVAS_ITEM_CLASS(sp_ctrl_parent_class)->destroy(object);
 }
 
 static void
@@ -251,8 +224,8 @@ sp_ctrl_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int fla
 
     ctrl = SP_CTRL (item);
 
-    if ((SP_CANVAS_ITEM_CLASS(parent_class))->update)
-        (* (SP_CANVAS_ITEM_CLASS(parent_class))->update) (item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrl_parent_class)->update)
+        SP_CANVAS_ITEM_CLASS(sp_ctrl_parent_class)->update(item, affine, flags);
 
     sp_canvas_item_reset_bounds (item);
 
diff --git a/src/display/sp-ctrlcurve.cpp b/src/display/sp-ctrlcurve.cpp
index d9b687f2e..2e0e8105b 100644
--- a/src/display/sp-ctrlcurve.cpp
+++ b/src/display/sp-ctrlcurve.cpp
@@ -23,42 +23,18 @@
 
 namespace {
 
-static void sp_ctrlcurve_class_init(SPCtrlCurveClass *klass, gpointer data);
-static void sp_ctrlcurve_init(SPCtrlCurve *ctrlcurve, gpointer g_class);
 static void sp_ctrlcurve_destroy(SPCanvasItem *object);
 
 static void sp_ctrlcurve_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 static void sp_ctrlcurve_render(SPCanvasItem *item, SPCanvasBuf *buf);
 
-static SPCanvasItemClass *parent_class;
-
 } // namespace
 
-GType SPCtrlCurve::getType()
-{
-    static GType type = 0;
-    if (!type) {
-        GTypeInfo info = {
-            sizeof(SPCtrlCurveClass),
-            NULL, NULL,
-            reinterpret_cast<GClassInitFunc>(sp_ctrlcurve_class_init),
-            NULL, NULL,
-            sizeof(SPCtrlCurve),
-            0,
-            reinterpret_cast<GInstanceInitFunc>(sp_ctrlcurve_init),
-            NULL
-        };
-        type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlCurve", &info, static_cast<GTypeFlags>(0));
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPCtrlCurve, sp_ctrlcurve, SP_TYPE_CANVAS_ITEM);
 
-namespace {
-
-void sp_ctrlcurve_class_init(SPCtrlCurveClass *klass, gpointer /*g_class*/)
+static void
+sp_ctrlcurve_class_init(SPCtrlCurveClass *klass)
 {
-    parent_class = reinterpret_cast<SPCanvasItemClass*>(g_type_class_peek_parent(klass));
-
     klass->destroy = sp_ctrlcurve_destroy;
 
     klass->update = sp_ctrlcurve_update;
@@ -66,13 +42,14 @@ void sp_ctrlcurve_class_init(SPCtrlCurveClass *klass, gpointer /*g_class*/)
 }
 
 static void
-sp_ctrlcurve_init(SPCtrlCurve *ctrlcurve, gpointer /*g_class*/)
+sp_ctrlcurve_init(SPCtrlCurve *ctrlcurve)
 {
     // Points are initialized to 0,0
     ctrlcurve->rgba = 0x0000ff7f;
     ctrlcurve->item=NULL;
 }
 
+namespace {
 static void
 sp_ctrlcurve_destroy(SPCanvasItem *object)
 {
@@ -83,8 +60,8 @@ sp_ctrlcurve_destroy(SPCanvasItem *object)
 
     ctrlcurve->item=NULL;
 
-    if (SP_CANVAS_ITEM_CLASS (parent_class)->destroy)
-        (* SP_CANVAS_ITEM_CLASS (parent_class)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrlcurve_parent_class)->destroy)
+        SP_CANVAS_ITEM_CLASS(sp_ctrlcurve_parent_class)->destroy(object);
 }
 
 static void
@@ -125,8 +102,8 @@ sp_ctrlcurve_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int
 
     item->canvas->requestRedraw(item->x1, item->y1, item->x2, item->y2);
 
-    if (parent_class->update)
-        (* parent_class->update) (item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrlcurve_parent_class)->update)
+        SP_CANVAS_ITEM_CLASS(sp_ctrlcurve_parent_class)->update(item, affine, flags);
 
     sp_canvas_item_reset_bounds (item);
 
diff --git a/src/display/sp-ctrlcurve.h b/src/display/sp-ctrlcurve.h
index 90936185c..847944f38 100644
--- a/src/display/sp-ctrlcurve.h
+++ b/src/display/sp-ctrlcurve.h
@@ -19,14 +19,11 @@
 
 class SPItem;
 
-#define SP_TYPE_CTRLCURVE (SPCtrlCurve::getType())
+#define SP_TYPE_CTRLCURVE (sp_ctrlcurve_get_type())
 #define SP_CTRLCURVE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SP_TYPE_CTRLCURVE, SPCtrlCurve))
 #define SP_IS_CTRLCURVE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SP_TYPE_CTRLCURVE))
 
 struct SPCtrlCurve : public SPCtrlLine {
-
-    static GType getType();
-
     void setCoords( gdouble x0, gdouble y0, gdouble x1, gdouble y1,
                     gdouble x2, gdouble y2, gdouble x3, gdouble y3 );
 
@@ -36,9 +33,9 @@ struct SPCtrlCurve : public SPCtrlLine {
     Geom::Point p0, p1, p2, p3;
 };
 
-struct SPCtrlCurveClass : public SPCtrlLineClass{};
-
+GType sp_ctrlcurve_get_type();
 
+struct SPCtrlCurveClass : public SPCtrlLineClass{};
 
 #endif // SEEN_INKSCAPE_CTRLCURVE_H
 
diff --git a/src/display/sp-ctrlline.cpp b/src/display/sp-ctrlline.cpp
index aef284c1a..1bde540c0 100644
--- a/src/display/sp-ctrlline.cpp
+++ b/src/display/sp-ctrlline.cpp
@@ -30,55 +30,31 @@
 
 namespace {
 
-void sp_ctrlline_class_init(SPCtrlLineClass *klass, gpointer data);
-void sp_ctrlline_init(SPCtrlLine *ctrlline, gpointer g_class);
 void sp_ctrlline_destroy(SPCanvasItem *object);
 
 void sp_ctrlline_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 void sp_ctrlline_render(SPCanvasItem *item, SPCanvasBuf *buf);
 
-SPCanvasItemClass *parent_class = 0;
-
 } // namespace
 
-GType SPCtrlLine::getType()
-{
-    static GType type = 0;
-    if (!type) {
-        GTypeInfo info = {
-            sizeof(SPCtrlLineClass),
-            NULL, NULL,
-            reinterpret_cast<GClassInitFunc>(sp_ctrlline_class_init),
-            NULL, NULL,
-            sizeof(SPCtrlLine),
-            0,
-            reinterpret_cast<GInstanceInitFunc>(sp_ctrlline_init),
-            NULL
-        };
-        type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlLine", &info, static_cast<GTypeFlags>(0));
-    }
-    return type;
-}
-
-namespace {
+G_DEFINE_TYPE(SPCtrlLine, sp_ctrlline, SP_TYPE_CANVAS_ITEM);
 
-void sp_ctrlline_class_init(SPCtrlLineClass *klass, gpointer /*data*/)
+static void sp_ctrlline_class_init(SPCtrlLineClass *klass)
 {
-    parent_class = reinterpret_cast<SPCanvasItemClass*>(g_type_class_peek_parent(klass));
-
     klass->destroy = sp_ctrlline_destroy;
 
     klass->update = sp_ctrlline_update;
     klass->render = sp_ctrlline_render;
 }
 
-void sp_ctrlline_init(SPCtrlLine *ctrlline, gpointer /*g_class*/)
+static void sp_ctrlline_init(SPCtrlLine *ctrlline)
 {
     ctrlline->rgba = 0x0000ff7f;
     ctrlline->s[Geom::X] = ctrlline->s[Geom::Y] = ctrlline->e[Geom::X] = ctrlline->e[Geom::Y] = 0.0;
     ctrlline->item=NULL;
 }
 
+namespace {
 void sp_ctrlline_destroy(SPCanvasItem *object)
 {
     g_return_if_fail(object != NULL);
@@ -88,8 +64,8 @@ void sp_ctrlline_destroy(SPCanvasItem *object)
 
     ctrlline->item = NULL;
 
-    if(SP_CANVAS_ITEM_CLASS (parent_class)->destroy) {
-        (* SP_CANVAS_ITEM_CLASS (parent_class)->destroy)(object);
+    if(SP_CANVAS_ITEM_CLASS (sp_ctrlline_parent_class)->destroy) {
+       SP_CANVAS_ITEM_CLASS (sp_ctrlline_parent_class)->destroy(object);
     }
 }
 
@@ -134,8 +110,8 @@ void sp_ctrlline_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned
 
     item->canvas->requestRedraw(item->x1, item->y1, item->x2, item->y2);
 
-    if (parent_class->update) {
-        (* parent_class->update)(item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrlline_parent_class)->update) {
+        SP_CANVAS_ITEM_CLASS(sp_ctrlline_parent_class)->update(item, affine, flags);
     }
 
     sp_canvas_item_reset_bounds(item);
diff --git a/src/display/sp-ctrlline.h b/src/display/sp-ctrlline.h
index 12be03ca5..b2e222437 100644
--- a/src/display/sp-ctrlline.h
+++ b/src/display/sp-ctrlline.h
@@ -20,13 +20,11 @@
 
 class SPItem;
 
-#define SP_TYPE_CTRLLINE (SPCtrlLine::getType())
+#define SP_TYPE_CTRLLINE (sp_ctrlline_get_type())
 #define SP_CTRLLINE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SP_TYPE_CTRLLINE, SPCtrlLine))
 #define SP_IS_CTRLLINE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SP_TYPE_CTRLLINE))
 
 struct SPCtrlLine : public SPCanvasItem {
-    static GType getType();
-
     void setRgba32(guint32 rgba);
 
     void setCoords(gdouble x0, gdouble y0, gdouble x1, gdouble y1);
@@ -41,6 +39,8 @@ struct SPCtrlLine : public SPCanvasItem {
     Geom::Affine affine;
 };
 
+GType sp_ctrlline_get_type();
+
 struct SPCtrlLineClass : public SPCanvasItemClass{};
 
 
diff --git a/src/display/sp-ctrlpoint.cpp b/src/display/sp-ctrlpoint.cpp
index 026cc7589..1082cb1b3 100644
--- a/src/display/sp-ctrlpoint.cpp
+++ b/src/display/sp-ctrlpoint.cpp
@@ -20,42 +20,17 @@
 #include "display/cairo-utils.h"
 #include "display/sp-canvas.h"
 
-
-static void sp_ctrlpoint_class_init (SPCtrlPointClass *klass);
-static void sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint);
 static void sp_ctrlpoint_destroy(SPCanvasItem *object);
 
 static void sp_ctrlpoint_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 static void sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf);
 
-static SPCanvasItemClass *parent_class;
-
-GType
-sp_ctrlpoint_get_type (void)
-{
-    static GType type = 0;
-    if (!type) {
-        GTypeInfo info = {
-            sizeof(SPCtrlPointClass),
-            NULL, NULL,
-            (GClassInitFunc) sp_ctrlpoint_class_init,
-            NULL, NULL,
-            sizeof(SPCtrlPoint),
-            0,
-            (GInstanceInitFunc) sp_ctrlpoint_init,
-            NULL
-        };
-        type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlPoint", &info, (GTypeFlags)0);
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPCtrlPoint, sp_ctrlpoint, SP_TYPE_CANVAS_ITEM);
 
 static void sp_ctrlpoint_class_init(SPCtrlPointClass *klass)
 {
     SPCanvasItemClass *item_class = SP_CANVAS_ITEM_CLASS(klass);
 
-    parent_class = SP_CANVAS_ITEM_CLASS(g_type_class_peek_parent(klass));
-
     item_class->destroy = sp_ctrlpoint_destroy;
     item_class->update = sp_ctrlpoint_update;
     item_class->render = sp_ctrlpoint_render;
@@ -79,8 +54,8 @@ static void sp_ctrlpoint_destroy(SPCanvasItem *object)
 
     ctrlpoint->item=NULL;
 
-    if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)
-        (* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrlpoint_parent_class)->destroy)
+        SP_CANVAS_ITEM_CLASS(sp_ctrlpoint_parent_class)->destroy(object);
 }
 
 static void
@@ -111,8 +86,8 @@ static void sp_ctrlpoint_update(SPCanvasItem *item, Geom::Affine const &affine,
 
     item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
 
-    if (parent_class->update) {
-        (* parent_class->update) (item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrlpoint_parent_class)->update) {
+        SP_CANVAS_ITEM_CLASS(sp_ctrlpoint_parent_class)->update(item, affine, flags);
     }
 
     sp_canvas_item_reset_bounds (item);
diff --git a/src/display/sp-ctrlquadr.cpp b/src/display/sp-ctrlquadr.cpp
index b6a0da109..760e93a6d 100644
--- a/src/display/sp-ctrlquadr.cpp
+++ b/src/display/sp-ctrlquadr.cpp
@@ -29,42 +29,18 @@ struct SPCtrlQuadr : public SPCanvasItem{
 
 struct SPCtrlQuadrClass : public SPCanvasItemClass{};
 
-static void sp_ctrlquadr_class_init (SPCtrlQuadrClass *klass);
-static void sp_ctrlquadr_init (SPCtrlQuadr *ctrlquadr);
 static void sp_ctrlquadr_destroy(SPCanvasItem *object);
 
 static void sp_ctrlquadr_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
 static void sp_ctrlquadr_render (SPCanvasItem *item, SPCanvasBuf *buf);
 
-static SPCanvasItemClass *parent_class;
-
-GType
-sp_ctrlquadr_get_type (void)
-{
-    static GType type = 0;
-    if (!type) {
-        GTypeInfo info = {
-            sizeof(SPCtrlQuadrClass),
-            NULL, NULL,
-            (GClassInitFunc) sp_ctrlquadr_class_init,
-            NULL, NULL,
-            sizeof(SPCtrlQuadr),
-            0,
-            (GInstanceInitFunc) sp_ctrlquadr_init,
-            NULL
-        };
-        type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlQuadr", &info, (GTypeFlags)0);
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPCtrlQuadr, sp_ctrlquadr, SP_TYPE_CANVAS_ITEM);
 
 static void
 sp_ctrlquadr_class_init (SPCtrlQuadrClass *klass)
 {
     SPCanvasItemClass *item_class = SP_CANVAS_ITEM_CLASS(klass);
 
-    parent_class = SP_CANVAS_ITEM_CLASS(g_type_class_peek_parent(klass));
-
     item_class->destroy = sp_ctrlquadr_destroy;
     item_class->update = sp_ctrlquadr_update;
     item_class->render = sp_ctrlquadr_render;
@@ -85,8 +61,8 @@ static void sp_ctrlquadr_destroy(SPCanvasItem *object)
     g_return_if_fail (object != NULL);
     g_return_if_fail (SP_IS_CTRLQUADR (object));
 
-    if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)
-        (* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrlquadr_parent_class)->destroy)
+        (* SP_CANVAS_ITEM_CLASS(sp_ctrlquadr_parent_class)->destroy) (object);
 }
 
 static void
@@ -139,8 +115,8 @@ static void sp_ctrlquadr_update(SPCanvasItem *item, Geom::Affine const &affine,
 
     item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
 
-    if (parent_class->update) {
-        (* parent_class->update)(item, affine, flags);
+    if (SP_CANVAS_ITEM_CLASS(sp_ctrlquadr_parent_class)->update) {
+        SP_CANVAS_ITEM_CLASS(sp_ctrlquadr_parent_class)->update(item, affine, flags);
     }
 
     sp_canvas_item_reset_bounds (item);
diff --git a/src/svg-view-widget.cpp b/src/svg-view-widget.cpp
index 9174d1083..657ddb2bb 100644
--- a/src/svg-view-widget.cpp
+++ b/src/svg-view-widget.cpp
@@ -23,8 +23,6 @@
 #include "svg-view-widget.h"
 #include "util/units.h"
 
-static void sp_svg_view_widget_class_init (SPSVGSPViewWidgetClass *klass);
-static void sp_svg_view_widget_init (SPSVGSPViewWidget *widget);
 static void sp_svg_view_widget_dispose(GObject *object);
 
 static void sp_svg_view_widget_size_allocate (GtkWidget *widget, GtkAllocation *allocation);
@@ -42,28 +40,7 @@ static void sp_svg_view_widget_get_preferred_height(GtkWidget *widget,
 
 static void sp_svg_view_widget_view_resized (SPViewWidget *vw, Inkscape::UI::View::View *view, gdouble width, gdouble height);
 
-static SPViewWidgetClass *widget_parent_class;
-
-GType sp_svg_view_widget_get_type(void)
-{
-    static GType type = 0;
-    if (!type) {
-        GTypeInfo info = {
-            sizeof(SPSVGSPViewWidgetClass),
-            0, // base_init
-            0, // base_finalize
-            (GClassInitFunc)sp_svg_view_widget_class_init,
-            0, // class_finalize
-            0, // class_data
-            sizeof(SPSVGSPViewWidget),
-            0, // n_preallocs
-            (GInstanceInitFunc)sp_svg_view_widget_init,
-            0 // value_table
-        };
-        type = g_type_register_static(SP_TYPE_VIEW_WIDGET, "SPSVGSPViewWidget", &info, static_cast<GTypeFlags>(0));
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPSVGSPViewWidget, sp_svg_view_widget, SP_TYPE_VIEW_WIDGET);
 
 /**
  * Callback to initialize SPSVGSPViewWidget vtable.
@@ -74,8 +51,6 @@ static void sp_svg_view_widget_class_init(SPSVGSPViewWidgetClass *klass)
 	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 	SPViewWidgetClass *vw_class = SP_VIEW_WIDGET_CLASS (klass);
 
-	widget_parent_class = static_cast<SPViewWidgetClass *>(g_type_class_peek_parent (klass));
-
 	object_class->dispose = sp_svg_view_widget_dispose;
 
 	widget_class->size_allocate = sp_svg_view_widget_size_allocate;
@@ -142,8 +117,8 @@ static void sp_svg_view_widget_dispose(GObject *object)
 
 	vw->canvas = NULL;
 
-	if (((GObjectClass *) (widget_parent_class))->dispose) {
-		(* ((GObjectClass *) (widget_parent_class))->dispose) (object);
+	if (G_OBJECT_CLASS(sp_svg_view_widget_parent_class)->dispose) {
+            G_OBJECT_CLASS(sp_svg_view_widget_parent_class)->dispose(object);
         }
 }
 
@@ -156,17 +131,18 @@ static void sp_svg_view_widget_size_request(GtkWidget *widget, GtkRequisition *r
 	Inkscape::UI::View::View *v = SP_VIEW_WIDGET_VIEW (widget);
 
 #if GTK_CHECK_VERSION(3,0,0)
-	if (((GtkWidgetClass *) (widget_parent_class))->get_preferred_width && ((GtkWidgetClass *) (widget_parent_class))->get_preferred_width) {
+	if (GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_width &&
+            GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_height) {
 		gint width_min, height_min, width_nat, height_nat;
 
-		(* ((GtkWidgetClass *) (widget_parent_class))->get_preferred_width) (widget, &width_min, &width_nat);
-		(* ((GtkWidgetClass *) (widget_parent_class))->get_preferred_height) (widget, &height_min, &height_nat);
+		GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_width(widget, &width_min, &width_nat);
+		GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_height(widget, &height_min, &height_nat);
 		req->width=width_min;
 		req->height=height_min;
         }
 #else
-	if (((GtkWidgetClass *) (widget_parent_class))->size_request) {
-		(* ((GtkWidgetClass *) (widget_parent_class))->size_request) (widget, req);
+	if (GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->size_request) {
+            GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->size_request(widget, req);
         }
 #endif
 
@@ -220,8 +196,8 @@ static void sp_svg_view_widget_size_allocate(GtkWidget *widget, GtkAllocation *a
 {
 	SPSVGSPViewWidget *svgvw = SP_SVG_VIEW_WIDGET (widget);
 
-	if (((GtkWidgetClass *) (widget_parent_class))->size_allocate) {
-		(* ((GtkWidgetClass *) (widget_parent_class))->size_allocate) (widget, allocation);
+	if (GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->size_allocate) {
+            GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->size_allocate(widget, allocation);
         }
 
 	if (!svgvw->resize) {
diff --git a/src/ui/view/view-widget.cpp b/src/ui/view/view-widget.cpp
index 5cb0df215..671a4afe6 100644
--- a/src/ui/view/view-widget.cpp
+++ b/src/ui/view/view-widget.cpp
@@ -15,32 +15,9 @@
 //using namespace Inkscape::UI::View;
 
 // SPViewWidget
-
-static void sp_view_widget_class_init(SPViewWidgetClass *vwc);
-static void sp_view_widget_init(SPViewWidget *widget);
 static void sp_view_widget_dispose(GObject *object);
 
-static GtkEventBoxClass *widget_parent_class;
-
-GType sp_view_widget_get_type(void)
-{
-    static GType type = 0;
-    if (!type) {
-	GTypeInfo info = {
-            sizeof(SPViewWidgetClass),
-	    NULL, NULL,
-            (GClassInitFunc) sp_view_widget_class_init,
-	    NULL, NULL,
-            sizeof(SPViewWidget),
-	    0,
-            (GInstanceInitFunc) sp_view_widget_init,
-	    NULL
-	};
-        type = g_type_register_static (GTK_TYPE_EVENT_BOX, "SPViewWidget", &info, (GTypeFlags)0);
-    }
-    
-    return type;
-}
+G_DEFINE_TYPE(SPViewWidget, sp_view_widget, GTK_TYPE_EVENT_BOX);
 
 /**
  * Callback to initialize the SPViewWidget vtable.
@@ -48,8 +25,6 @@ GType sp_view_widget_get_type(void)
 static void sp_view_widget_class_init(SPViewWidgetClass *vwc)
 {
     GObjectClass *object_class = G_OBJECT_CLASS(vwc);
-
-    widget_parent_class = (GtkEventBoxClass*) g_type_class_peek_parent(vwc);
     
     object_class->dispose = sp_view_widget_dispose;
 }
@@ -77,8 +52,8 @@ static void sp_view_widget_dispose(GObject *object)
         vw->view = NULL;
     }
 
-    if (((GObjectClass *) (widget_parent_class))->dispose) {
-        (* ((GObjectClass *) (widget_parent_class))->dispose)(object);
+    if (G_OBJECT_CLASS(sp_view_widget_parent_class)->dispose) {
+        G_OBJECT_CLASS(sp_view_widget_parent_class)->dispose(object);
     }
 
     Inkscape::GC::request_early_collection();
diff --git a/src/widgets/sp-widget.cpp b/src/widgets/sp-widget.cpp
index 0e2295e36..257d8ef30 100644
--- a/src/widgets/sp-widget.cpp
+++ b/src/widgets/sp-widget.cpp
@@ -36,8 +36,6 @@ public:
     SPWidgetImpl(SPWidget &target);
     ~SPWidgetImpl();
 
-    static void classInit(SPWidgetClass *klass);
-    static void init(SPWidget *widget);
     static void dispose(GObject *object);
     static void show(GtkWidget *widget);
     static void hide(GtkWidget *widget);
@@ -68,57 +66,20 @@ public:
     void setSelection(Application *inkscape, Selection *selection);
 
 private:
-    static GtkBinClass *parentClass;
-    static guint signals[LAST_SIGNAL];
-
     SPWidget &_target;
 };
-
-GtkBinClass *SPWidgetImpl::parentClass = 0;
-guint SPWidgetImpl::signals[LAST_SIGNAL] = {0};
-
 } // namespace Inkscape
 
-GType SPWidget::getType()
-{
-    static GType type = 0;
-    if (!type) {
-        static GTypeInfo const info = {
-            sizeof(SPWidgetClass),
-            NULL, NULL,
-            reinterpret_cast<GClassInitFunc>(SPWidgetImpl::classInit),
-            NULL, NULL,
-            sizeof(SPWidget),
-            0,
-            reinterpret_cast<GInstanceInitFunc>(SPWidgetImpl::init),
-            NULL
-        };
-        type = g_type_register_static(GTK_TYPE_BIN,
-                                      "SPWidget",
-                                      &info,
-                                      static_cast<GTypeFlags>(0));
-    }
-    return type;
-}
+G_DEFINE_TYPE(SPWidget, sp_widget, GTK_TYPE_BIN);
 
-namespace Inkscape {
+static guint signals[LAST_SIGNAL] = {0};
 
-SPWidgetImpl::SPWidgetImpl(SPWidget &target) :
-    _target(target)
-{
-}
-
-SPWidgetImpl::~SPWidgetImpl()
-{
-}
-
-void SPWidgetImpl::classInit(SPWidgetClass *klass)
+static void
+sp_widget_class_init(SPWidgetClass *klass)
 {
     GObjectClass *object_class = reinterpret_cast<GObjectClass *>(klass);
     GtkWidgetClass *widget_class = reinterpret_cast<GtkWidgetClass *>(klass);
 
-    parentClass = reinterpret_cast<GtkBinClass *>(g_type_class_peek_parent(klass));
-
     object_class->dispose = SPWidgetImpl::dispose;
 
     signals[CONSTRUCT] =        g_signal_new ("construct",
@@ -169,13 +130,23 @@ void SPWidgetImpl::classInit(SPWidgetClass *klass)
     widget_class->size_allocate = SPWidgetImpl::sizeAllocate;
 }
 
-void SPWidgetImpl::init(SPWidget *spw)
+static void sp_widget_init(SPWidget *spw)
 {
     spw->inkscape = NULL;
-
     spw->_impl = new SPWidgetImpl(*spw); // ctor invoked after all other init
 }
 
+namespace Inkscape {
+
+SPWidgetImpl::SPWidgetImpl(SPWidget &target) :
+    _target(target)
+{
+}
+
+SPWidgetImpl::~SPWidgetImpl()
+{
+}
+
 void SPWidgetImpl::dispose(GObject *object)
 {
     SPWidget *spw = reinterpret_cast<SPWidget *>(object);
@@ -194,8 +165,8 @@ void SPWidgetImpl::dispose(GObject *object)
     delete spw->_impl;
     spw->_impl = 0;
 
-    if (reinterpret_cast<GObjectClass *>(parentClass)->dispose) {
-        (*reinterpret_cast<GObjectClass *>(parentClass)->dispose)(object);
+    if (G_OBJECT_CLASS(sp_widget_parent_class)->dispose) {
+        G_OBJECT_CLASS(sp_widget_parent_class)->dispose(object);
     }
 }
 
@@ -210,8 +181,8 @@ void SPWidgetImpl::show(GtkWidget *widget)
         g_signal_connect(spw->inkscape, "set_selection", G_CALLBACK(SPWidgetImpl::setSelectionCB), spw);
     }
 
-    if (reinterpret_cast<GtkWidgetClass *>(parentClass)->show) {
-        (*reinterpret_cast<GtkWidgetClass *>(parentClass)->show)(widget);
+    if (GTK_WIDGET_CLASS(sp_widget_parent_class)->show) {
+        GTK_WIDGET_CLASS(sp_widget_parent_class)->show(widget);
     }
 }
 
@@ -224,8 +195,8 @@ void SPWidgetImpl::hide(GtkWidget *widget)
         sp_signal_disconnect_by_data(spw->inkscape, spw);
     }
 
-    if (reinterpret_cast<GtkWidgetClass *>(parentClass)->hide) {
-        (*reinterpret_cast<GtkWidgetClass *>(parentClass)->hide)(widget);
+    if (GTK_WIDGET_CLASS(sp_widget_parent_class)->hide) {
+        GTK_WIDGET_CLASS(sp_widget_parent_class)->hide(widget);
     }
 }
 
diff --git a/src/widgets/sp-widget.h b/src/widgets/sp-widget.h
index 3a23a92c5..e23a6da4f 100644
--- a/src/widgets/sp-widget.h
+++ b/src/widgets/sp-widget.h
@@ -18,7 +18,7 @@
 #include <glib.h>
 #include <gtk/gtk.h>
 
-#define SP_TYPE_WIDGET (SPWidget::getType())
+#define SP_TYPE_WIDGET (sp_widget_get_type())
 #define SP_WIDGET(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SP_TYPE_WIDGET, SPWidget))
 #define SP_WIDGET_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), SP_TYPE_WIDGET, SPWidgetClass))
 #define SP_IS_WIDGET(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SP_TYPE_WIDGET))
@@ -36,14 +36,9 @@ class SPWidgetImpl;
 struct SPWidget {
     friend class Inkscape::SPWidgetImpl;
 
-    static GType getType();
-
-    //
-
     GtkBin bin;
     Inkscape::Application *inkscape;
 
-private:
     Inkscape::SPWidgetImpl *_impl;
 };
 
@@ -58,7 +53,7 @@ struct SPWidgetClass {
     void (* set_selection) (SPWidget *spw, Inkscape::Selection *selection);
 };
 
-/* fixme: Think (Lauris) */
+GType sp_widget_get_type();
 
 /** Generic constructor for global widget. */
 GtkWidget *sp_widget_new_global(Inkscape::Application *inkscape);