diff --git a/.gitattributes b/.gitattributes
index 24eb9a2f79..0fae6e3b8f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -9466,6 +9466,7 @@ lcl/interfaces/gtk3/gtk3wsforms.pp svneol=native#text/plain
 lcl/interfaces/gtk3/gtk3wsimglist.pp svneol=native#text/plain
 lcl/interfaces/gtk3/gtk3wsmenus.pp svneol=native#text/plain
 lcl/interfaces/gtk3/gtk3wsspin.pp svneol=native#text/plain
+lcl/interfaces/gtk3/gtk3wssplitter.pas svneol=native#text/pascal
 lcl/interfaces/gtk3/gtk3wsstdctrls.pp svneol=native#text/plain
 lcl/interfaces/gtk3/interfaces.pp svneol=native#text/plain
 lcl/interfaces/gtk3/issues.xml svneol=native#text/plain
diff --git a/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas b/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas
index f13677e420..a5fde35ded 100644
--- a/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas
+++ b/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas
@@ -283,8 +283,8 @@ type
   TGtkOrientation = Integer;
 const
   { GtkOrientation }
-  GTK_ORIENTATION_HORIZONTAL: TGtkOrientation = 0;
-  GTK_ORIENTATION_VERTICAL: TGtkOrientation = 1;
+  GTK_ORIENTATION_HORIZONTAL = TGtkOrientation(0);
+  GTK_ORIENTATION_VERTICAL = TGtkOrientation(1);
 
 type
   TGtkDestDefaults = Integer;
diff --git a/lcl/interfaces/gtk3/gtk3lclintf.inc b/lcl/interfaces/gtk3/gtk3lclintf.inc
index cb3ecf27c5..8308e041f7 100644
--- a/lcl/interfaces/gtk3/gtk3lclintf.inc
+++ b/lcl/interfaces/gtk3/gtk3lclintf.inc
@@ -29,45 +29,22 @@ begin
   if dy < 0 then
     dy := 0;
 
-  (*
   // rubber band is just a window without a title
-  Result := {%H-}HWND(gtk_window_new(GTK_WINDOW_POPUP));
+  Result := {%H-}HWND(gtk_window_new(GTK_WINDOW_TOPLEVEL));
   gtk_window_set_default_size({%H-}PGtkWindow(Result), dx, dy);
-  gtk_widget_set_uposition(Widget, ARect.Left, ARect.Top);
-  gtk_widget_set_app_paintable(Widget, True);
+
   gtk_widget_realize(Widget);
+
   gdk_window_set_decorations(Widget^.window, 0);
   gdk_window_set_functions(Widget^.window, GDK_FUNC_RESIZE or GDK_FUNC_CLOSE);
-  gtk_window_set_opacity({%H-}PGtkWindow(Result), 0.25);
-  if ABrush = 0 then
-    SetWidgetColor(Widget, clNone, clGradientActiveCaption, [GTK_STATE_NORMAL])
-  else
-  if {%H-}PGDIObject(ABrush)^.GDIBrushFill = GDK_SOLID then
-    SetWidgetColor(Widget, clNone, {%H-}PGDIObject(ABrush)^.GDIBrushColor.ColorRef, [GTK_STATE_NORMAL])
-  else
-  begin
-    Pixmap := gdk_pixmap_new(Widget^.window, dx, dy, -1);
-    gc := gdk_gc_new(Pixmap);
-    AColor := AllocGDKColor(clWhite);
-    gdk_gc_set_foreground(gc, @AColor);
-    gdk_gc_set_fill(gc, {%H-}PGDIObject(ABrush)^.GDIBrushFill);
-    case {%H-}PGDIObject(ABrush)^.GDIBrushFill of
-      GDK_TILED: gdk_gc_set_tile(gc, {%H-}PGDIObject(ABrush)^.GDIBrushPixMap);
-      GDK_STIPPLED: gdk_gc_set_stipple(gc, {%H-}PGDIObject(ABrush)^.GDIBrushPixMap);
-    end;
-    gdk_draw_rectangle(Pixmap, gc, -1, 0, 0, dx, dy);
-    gdk_gc_unref(gc);
-    gdk_window_set_back_pixmap(Widget^.window, Pixmap, False);
-    g_object_unref(Pixmap);
-  end;
+  gtk_widget_set_opacity(Widget, 0.25);
 
   gtk_widget_show(Widget);
-  *)
 end;
 
 procedure TGtk3WidgetSet.DestroyRubberBand(ARubberBand: HWND);
 begin
-  // TODO: gtk_widget_destroy({%H-}PGtkWidget(ARubberBand));
+  gtk_widget_destroy({%H-}PGtkWidget(ARubberBand));
 end;
 
 procedure TGtk3WidgetSet.DrawDefaultDockImage(AOldRect, ANewRect: TRect;
diff --git a/lcl/interfaces/gtk3/gtk3widgets.pas b/lcl/interfaces/gtk3/gtk3widgets.pas
index bbfd68a4fa..660fe10e6e 100644
--- a/lcl/interfaces/gtk3/gtk3widgets.pas
+++ b/lcl/interfaces/gtk3/gtk3widgets.pas
@@ -25,7 +25,7 @@ uses
   Classes, SysUtils, types, math,
   // LCL
   Controls, StdCtrls, ExtCtrls, ComCtrls, Graphics, Dialogs, Forms, Menus, ExtDlgs,
-  Spin, CheckLst, LCLType, LCLProc, LMessages, LCLMessageGlue, LCLIntf,
+  Spin, CheckLst, PairSplitter, LCLType, LCLProc, LMessages, LCLMessageGlue, LCLIntf,
   // GTK3
   LazGtk3, LazGdk3, LazGObject2, LazGLib2, LazCairo1, LazPango1, LazGdkPixbuf2,
   gtk3objects, gtk3procs, gtk3private, Gtk3CellRenderer;
@@ -383,6 +383,22 @@ type
 
   end;
 
+
+  { TGtk3Paned }
+
+  TGtk3Paned = class(TGtk3Container)
+  protected
+    function CreateWidget(const Params: TCreateParams):PGtkWidget; override;
+  end;
+
+  { TGtk3SplitterSide }
+
+  TGtk3SplitterSide = class(TGtk3Container)
+  protected
+    function CreateWidget(const Params: TCreateParams):PGtkWidget; override;
+  end;
+
+
   { TGtk3MenuShell }
 
   TGtk3MenuShell = class(TGtk3Container)
@@ -711,6 +727,13 @@ type
       function CreateWidget(const Params: TCreateParams):PGtkWidget; override;
   end;
 
+  { TGtk3Splitter }
+
+  TGtk3Splitter = class(TGtk3Panel)
+  public
+  end;
+
+
   { TGtk3Window }
 
   TGtk3Window = class(TGtk3ScrollableWin) {we are TGtk3Bin actually, but it won't hurt since we need scroll}
@@ -1591,6 +1614,25 @@ begin
   // DebugLn('Gtk3ScrollEvent for ', dbgsName(TGtk3Widget(AData).LCLObject),' Result ',dbgs(Result));
 end;
 
+{ TGtk3SplitterSide }
+
+function TGtk3SplitterSide.CreateWidget(const Params: TCreateParams): PGtkWidget;
+begin
+  Result:=TGtkScrolledWindow.new(nil, nil);
+end;
+
+{ TGtk3Paned }
+
+function TGtk3Paned.CreateWidget(const Params: TCreateParams): PGtkWidget;
+const
+  ornt:array[TPairSplitterType] of TGtkOrientation=(
+    GTK_ORIENTATION_HORIZONTAL,
+    GTK_ORIENTATION_VERTICAL
+    );
+begin
+  Result:=TGtkPaned.new(ornt[TPairSplitter(Self.LCLObject).SplitterType]);
+end;
+
 { TGtk3Widget }
 
 function TGtk3Widget.GtkEventMouseEnterLeave(Sender: PGtkWidget; Event: PGdkEvent): Boolean;
@@ -1598,23 +1640,22 @@ function TGtk3Widget.GtkEventMouseEnterLeave(Sender: PGtkWidget; Event: PGdkEven
 var
   Msg: TLMessage;
   // MouseMsg: TLMMouseMove absolute Msg;
+  {$IFDEF GTK3DEBUGCORE}
   MousePos: TPoint;
+  {$ENDIF}
 begin
   Result := False;
   FillChar(Msg, SizeOf(Msg), #0);
   if Event^.type_ = GDK_ENTER_NOTIFY then
-  begin
-    Msg.Msg := LM_MOUSEENTER;
-  end else
-  begin
+    Msg.Msg := LM_MOUSEENTER
+  else
     Msg.Msg := LM_MOUSELEAVE;
-  end;
 
-  MousePos.X := Round(Event^.crossing.x);
-  MousePos.Y := Round(Event^.crossing.y);
   NotifyApplicationUserInput(LCLObject, Msg.Msg);
   Result := DeliverMessage(Msg, True) <> 0;
   {$IFDEF GTK3DEBUGCORE}
+  MousePos.X := Round(Event^.crossing.x);
+  MousePos.Y := Round(Event^.crossing.y);
   DebugLn('GtkEventMouseEnterLeave: mousePos ',dbgs(MousePos),' Object ',dbgsName(LCLObject),
     ' IsEnter ',dbgs(Event^.type_ = GDK_ENTER_NOTIFY),' Result=',dbgs(Result));
   {$ENDIF}
@@ -3881,10 +3922,7 @@ begin
   AToolBar := TToolBar(LCLObject);
   FHasPaint := False;
   FWidgetType := [wtWidget, wtContainer];
-  Result := PGtkWidget(TGtkHBox.new(GTK_ORIENTATION_HORIZONTAL, 0));
-  FCentralWidget := PGtkWidget(TGtkFixed.new);
-  PGtkHBox(Result)^.add(FCentralWidget);
-  PGtkFixed(FCentralWidget)^.set_has_window(True);
+  Result:=PGtkWidget(TGtkToolbar.new);
 end;
 
 { TGtk3Page }
@@ -6457,7 +6495,7 @@ end;
 
 function TGtk3Window.GetTitle: String;
 begin
-  Result := '';
+  Result:=PGtkWindow(FWidget)^.get_title();
 end;
 
 procedure TGtk3Window.SetIcon(AValue: PGdkPixBuf);
@@ -6561,9 +6599,15 @@ begin
   FHasPaint := True;
   AForm := TCustomForm(LCLObject);
 
-  FWidgetType := [wtWidget, wtLayout, wtScrollingWin, wtWindow];
-
-  Result := TGtkWindow.new(GTK_WINDOW_TOPLEVEL);
+  if not Assigned(LCLObject.Parent) then
+  begin
+    Result := TGtkWindow.new(GTK_WINDOW_TOPLEVEL);
+    FWidgetType := [wtWidget, wtLayout, wtScrollingWin, wtWindow];
+  end else
+  begin
+    Result := PGtkScrolledWindow(TGtkScrolledWindow.new(nil, nil));
+    FWidgetType := [wtWidget, wtLayout, wtScrollingWin, wtCustomControl]
+  end;
 
   FBox := TGtkVBox.new(GTK_ORIENTATION_VERTICAL, 0);
 
diff --git a/lcl/interfaces/gtk3/gtk3winapi.inc b/lcl/interfaces/gtk3/gtk3winapi.inc
index e8b2cb0943..01d0e09bd2 100644
--- a/lcl/interfaces/gtk3/gtk3winapi.inc
+++ b/lcl/interfaces/gtk3/gtk3winapi.inc
@@ -3677,10 +3677,8 @@ end;
 
 function TGtk3WidgetSet.SetParent(hWndChild: HWND; hWndParent: HWND): HWND;
 begin
-  {$IFDEF GTK3DEBUGNOTIMPLEMENTED}
-  DebugLn('WARNING: TGtk3WidgetSet.SetParent not implemented ...');
-  {$ENDIF}
-  Result:=inherited SetParent(hWndChild, hWndParent);
+  Result := HWND(TGtk3Widget(hWndChild).getParent);
+  TGtk3Widget(hWndChild).SetParent(TGtk3Widget(hWndParent),0,0)
 end;
 
 function TGtk3WidgetSet.SetProp(Handle: hwnd; Str: PChar; Data: Pointer
diff --git a/lcl/interfaces/gtk3/gtk3wsextctrls.pp b/lcl/interfaces/gtk3/gtk3wsextctrls.pp
index 2b654d6114..b3ccfb3c19 100644
--- a/lcl/interfaces/gtk3/gtk3wsextctrls.pp
+++ b/lcl/interfaces/gtk3/gtk3wsextctrls.pp
@@ -50,6 +50,8 @@ type
 
   TGtk3WSCustomSplitter = class(TWSCustomSplitter)
   published
+    class function CreateHandle(const AWinControl: TWinControl;
+      const AParams: TCreateParams): TLCLIntfHandle; override;
   end;
 
   { TGtk3WSSplitter }
@@ -146,6 +148,17 @@ implementation
 uses
   gtk3widgets;
 
+{ TGtk3WSCustomSplitter }
+
+class function TGtk3WSCustomSplitter.CreateHandle(
+  const AWinControl: TWinControl; const AParams: TCreateParams): TLCLIntfHandle;
+var
+  ASplitter: TGtk3Splitter;
+begin
+  ASplitter := TGtk3Splitter.Create(AWinControl, AParams);
+  Result := TLCLIntfHandle(ASplitter);
+end;
+
 { TGtk3WSCustomPanel }
 
 class function TGtk3WSCustomPanel.CreateHandle(const AWinControl: TWinControl;
diff --git a/lcl/interfaces/gtk3/gtk3wsfactory.pas b/lcl/interfaces/gtk3/gtk3wsfactory.pas
index 425d62d8e3..fdbd2e4435 100644
--- a/lcl/interfaces/gtk3/gtk3wsfactory.pas
+++ b/lcl/interfaces/gtk3/gtk3wsfactory.pas
@@ -21,7 +21,7 @@ interface
 uses
   Classes, Controls, ComCtrls, Calendar, StdCtrls, Arrow, Spin,
   Dialogs, ExtCtrls, ExtDlgs, Buttons, CheckLst, Forms, Grids, Menus,
-  PairSplitter, ImgList, WSLCLClasses;
+  ImgList, PairSplitter, WSLCLClasses;
 
 
 // imglist
@@ -137,7 +137,7 @@ uses
 uses
   Gtk3WSImgList, Gtk3WSControls, Gtk3WSForms, Gtk3WSButtons, Gtk3WSStdCtrls,
   Gtk3WSComCtrls, Gtk3WSExtCtrls, Gtk3WSSpin, Gtk3WSMenus, Gtk3WSCalendar,
-  Gtk3WSDialogs, Gtk3WSCheckLst, Gtk3WSExtDlgs;
+  Gtk3WSDialogs, Gtk3WSCheckLst, Gtk3WSExtDlgs, gtk3wssplitter;
 
 // imglist
 function RegisterCustomImageListResolution: Boolean; alias : 'WSRegisterCustomImageListResolution';
@@ -402,9 +402,8 @@ end;
 
 function RegisterCustomSplitter: Boolean; alias : 'WSRegisterCustomSplitter';
 begin
-//  RegisterWSComponent(TCustomSplitter, TGtk2WSCustomSplitter);
-//  RegisterWSComponent(TSplitter, TGtk2WSSplitter);
-  Result := False;
+  RegisterWSComponent(TCustomSplitter, TGtk3WSCustomSplitter);
+  Result := true;
 end;
 
 function RegisterPaintBox: Boolean; alias : 'WSRegisterPaintBox';
@@ -597,16 +596,14 @@ end;
 
 function RegisterPairSplitterSide: Boolean; alias : 'WSRegisterPairSplitterSide';
 begin
-//  RegisterWSComponent(TPairSplitterSide, TGtk2WSPairSplitterSide); { GTK1 }
-//  RegisterWSComponent(TPairSplitterSide, TGtk2WSPairSplitterSide);
-  Result := False;
+  RegisterWSComponent(TPairSplitterSide, TGtk3WSPairSplitterSide);
+  Result := true;
 end;
 
 function RegisterCustomPairSplitter: Boolean; alias : 'WSRegisterCustomPairSplitter';
 begin
-  // RegisterWSComponent(TCustomPairSplitter, TGtk2WSCustomPairSplitter, TGtkPrivatePaned); { GTK1 }
-  // RegisterWSComponent(TCustomPairSplitter, TGtk2WSCustomPairSplitter);
-  Result := False;
+  RegisterWSComponent(TCustomPairSplitter, TGtk3WSCustomPairSplitter);
+  Result := true;
 end;
 
 function RegisterCustomFloatSpinEdit: Boolean; alias : 'WSRegisterCustomFloatSpinEdit';
diff --git a/lcl/interfaces/gtk3/gtk3wssplitter.pas b/lcl/interfaces/gtk3/gtk3wssplitter.pas
new file mode 100644
index 0000000000..d38b66c94e
--- /dev/null
+++ b/lcl/interfaces/gtk3/gtk3wssplitter.pas
@@ -0,0 +1,127 @@
+unit gtk3wssplitter;
+
+{$mode objfpc}{$H+}
+{$I gtk3defines.inc}
+
+interface
+
+uses
+  // LCL
+  LCLProc, ExtCtrls, Classes, Controls, SysUtils, types, Graphics, LCLType,
+  // widgetset
+  WSExtCtrls, WSLCLClasses, WSPairSplitter,
+  Gtk3WSControls,
+  PairSplitter;
+
+type
+
+  { TGtk3WSPairSplitterSide }
+
+  TGtk3WSPairSplitterSide = class(TWSPairSplitterSide)
+  published
+    class function CreateHandle(const AWinControl: TWinControl; const AParams: TCreateParams): TLCLIntfHandle; override;
+  end;
+
+  { TGtk3WSCustomPairSplitter }
+
+  TGtk3WSCustomPairSplitter = class(TWSCustomPairSplitter)
+  published
+    class function CreateHandle(const AWinControl: TWinControl; const AParams: TCreateParams): TLCLIntfHandle; override;
+    class function AddSide(ASplitter: TCustomPairSplitter; ASide: TPairSplitterSide; Side: integer): Boolean; override;
+    class function RemoveSide(ASplitter: TCustomPairSplitter; ASide: TPairSplitterSide; Side: integer): Boolean; override;
+    class function SetPosition(ASplitter: TCustomPairSplitter; var NewPosition: integer): Boolean; override;
+    // special cursor handling
+    class function GetSplitterCursor(ASplitter: TCustomPairSplitter; var ACursor: TCursor): Boolean; override;
+    class function SetSplitterCursor(ASplitter: TCustomPairSplitter; ACursor: TCursor): Boolean; override;
+  end;
+
+implementation
+uses
+  wsproc,gtk3widgets,lazgtk3;
+
+{ TGtk3WSPairSplitterSide }
+
+class function TGtk3WSPairSplitterSide.CreateHandle(
+  const AWinControl: TWinControl; const AParams: TCreateParams): TLCLIntfHandle;
+begin
+  Result:=TLclIntfHandle(TGtk3Window.Create(AWinControl, AParams));
+end;
+
+{ TGtk3WSSplitter }
+
+
+{ TGtk3WSCustomPairSplitter }
+
+class function TGtk3WSCustomPairSplitter.CreateHandle(
+  const AWinControl: TWinControl; const AParams: TCreateParams): TLCLIntfHandle;
+begin
+  Result:=TLclIntfHandle(TGtk3Paned.Create(AWinControl, AParams));
+end;
+
+class function TGtk3WSCustomPairSplitter.AddSide(ASplitter: TCustomPairSplitter;
+  ASide: TPairSplitterSide; Side: integer): Boolean;
+var
+  paned: TGtk3Paned;
+  wside:TGtk3Widget;
+begin
+  Result := False;
+  if not (WSCheckHandleAllocated(ASplitter, 'AddSide - splitter') and
+          WSCheckHandleAllocated(ASide, 'AddSide - side'))
+  then Exit;
+
+  if (Side < 0) or (Side > 1) then exit;
+
+  paned:=TGtk3Paned(ASplitter.Handle);
+  wside:=TGtk3Widget(ASide.Handle);
+
+  if Side=0 then
+  begin
+    PGtkWIdget(wside.Widget)^.set_parent(nil);
+    PGtkPaned(paned.Widget)^.add1(wside.Widget);
+  end
+  else
+  begin
+    PGtkWidget(wside.Widget)^.set_parent(nil);
+  	PGtkPaned(paned.Widget)^.add2(wside.Widget);
+  end;
+  Result := True;
+end;
+
+class function TGtk3WSCustomPairSplitter.RemoveSide(ASplitter: TCustomPairSplitter;
+  ASide: TPairSplitterSide; Side: integer): Boolean;
+begin
+  Result := False;
+end;
+
+class function TGtk3WSCustomPairSplitter.SetPosition(
+  ASplitter: TCustomPairSplitter; var NewPosition: integer): Boolean;
+var
+  paned:PGtkPaned;
+begin
+  Result:=false;
+  if not WSCheckHandleAllocated(ASplitter, ClassName+'.SetPosition') then
+  	Exit;
+
+  paned:=PGtkPaned(TGtk3Paned(ASplitter.Handle).Widget);
+  paned^.set_position(NewPosition);
+  Result:=true;
+  ///Result:=inherited SetPosition(ASplitter, NewPosition);
+end;
+
+class function TGtk3WSCustomPairSplitter.GetSplitterCursor(
+  ASplitter: TCustomPairSplitter; var ACursor: TCursor): Boolean;
+begin
+  ACursor:=crHsplit;
+  Result:=true;
+end;
+
+class function TGtk3WSCustomPairSplitter.SetSplitterCursor(
+  ASplitter: TCustomPairSplitter; ACursor: TCursor): Boolean;
+begin
+  //ASplitter.Cursor:=ACursor;
+  Result:=false;
+end;
+
+
+end.
+