loplugin:cstylecast: deal with remaining pointer casts

Change-Id: I07bf1403e6b992807541a499b786d47f835b2f81

14 files changed, 77 insertions, 77 deletions

diff --git a/vcl/unx/gtk/a11y/atkcomponent.cxx b/vcl/unx/gtk/a11y/atkcomponent.cxx
index f40cfe004733..08fd93afa6a7 100644
--- a/vcl/unx/gtk/a11y/atkcomponent.cxx
+++ b/vcl/unx/gtk/a11y/atkcomponent.cxx
@@ -321,14 +321,14 @@ component_wrapper_add_focus_handler (AtkComponent    *component,
     signal_id = g_signal_lookup( "focus-event", ATK_TYPE_OBJECT );
 
     ret = g_signal_handler_find( component, match_type, signal_id, 0, NULL,
-                                 (gpointer) &handler, NULL);
+                                 static_cast<gpointer>(&handler), NULL);
     if (!ret)
     {
         return g_signal_connect_closure_by_id (component,
                                                signal_id, 0,
                                                g_cclosure_new (
                                                G_CALLBACK (handler), NULL,
-                                               (GClosureNotify) NULL),
+                                               nullptr),
                                                FALSE);
     }
     else
diff --git a/vcl/unx/gtk/a11y/atkfactory.cxx b/vcl/unx/gtk/a11y/atkfactory.cxx
index fb0cc7741799..581f4d0091ac 100644
--- a/vcl/unx/gtk/a11y/atkfactory.cxx
+++ b/vcl/unx/gtk/a11y/atkfactory.cxx
@@ -58,14 +58,14 @@ atk_noop_object_wrapper_get_type()
         static const GTypeInfo typeInfo =
         {
             sizeof (AtkNoOpObjectClass),
-            (GBaseInitFunc) NULL,
-            (GBaseFinalizeFunc) NULL,
+            nullptr,
+            nullptr,
             reinterpret_cast<GClassInitFunc>(atk_noop_object_wrapper_class_init),
-            (GClassFinalizeFunc) NULL,
+            nullptr,
             NULL,
             sizeof (AtkObjectWrapper),
             0,
-            (GInstanceInitFunc) NULL,
+            nullptr,
             NULL
         } ;
 
diff --git a/vcl/unx/gtk/a11y/atkhypertext.cxx b/vcl/unx/gtk/a11y/atkhypertext.cxx
index e11f4987b6e5..47872486a55a 100644
--- a/vcl/unx/gtk/a11y/atkhypertext.cxx
+++ b/vcl/unx/gtk/a11y/atkhypertext.cxx
@@ -173,7 +173,7 @@ hyper_link_get_type()
 
         static const GInterfaceInfo atk_action_info = {
             reinterpret_cast<GInterfaceInitFunc>(actionIfaceInit),
-            (GInterfaceFinalizeFunc) NULL,
+            nullptr,
             NULL
         };
 
diff --git a/vcl/unx/gtk/a11y/atkregistry.cxx b/vcl/unx/gtk/a11y/atkregistry.cxx
index 10b76c3bffba..ee34ee1209c5 100644
--- a/vcl/unx/gtk/a11y/atkregistry.cxx
+++ b/vcl/unx/gtk/a11y/atkregistry.cxx
@@ -32,7 +32,7 @@ ooo_wrapper_registry_get(const Reference< XAccessible >& rxAccessible)
     if( uno_to_gobject )
     {
         gpointer cached =
-            g_hash_table_lookup(uno_to_gobject, (gpointer) rxAccessible.get());
+            g_hash_table_lookup(uno_to_gobject, static_cast<gpointer>(rxAccessible.get()));
 
         if( cached )
             return ATK_OBJECT( cached );
@@ -49,7 +49,7 @@ ooo_wrapper_registry_add(const Reference< XAccessible >& rxAccessible, AtkObject
    if( !uno_to_gobject )
         uno_to_gobject = g_hash_table_new (NULL, NULL);
 
-   g_hash_table_insert( uno_to_gobject, (gpointer) rxAccessible.get(), obj );
+   g_hash_table_insert( uno_to_gobject, static_cast<gpointer>(rxAccessible.get()), obj );
 }
 
 /*****************************************************************************/
@@ -58,7 +58,7 @@ void
 ooo_wrapper_registry_remove(XAccessible *pAccessible)
 {
     if( uno_to_gobject )
-        g_hash_table_remove( uno_to_gobject, (gpointer) pAccessible );
+        g_hash_table_remove( uno_to_gobject, static_cast<gpointer>(pAccessible) );
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/unx/gtk/a11y/atktextattributes.cxx b/vcl/unx/gtk/a11y/atktextattributes.cxx
index 283ff59db9e8..484336773906 100644
--- a/vcl/unx/gtk/a11y/atktextattributes.cxx
+++ b/vcl/unx/gtk/a11y/atktextattributes.cxx
@@ -988,7 +988,7 @@ TabStopList2String( const uno::Any& rAny, bool default_tabs )
             if( ret )
             {
                 gchar * old_tab_str = ret;
-                ret = g_strconcat(old_tab_str, " ", tab_str, (const char*)NULL);
+                ret = g_strconcat(old_tab_str, " ", tab_str, nullptr);
                 g_free( old_tab_str );
             }
             else
diff --git a/vcl/unx/gtk/a11y/atkutil.cxx b/vcl/unx/gtk/a11y/atkutil.cxx
index 03f08e4f30c6..cc2fe84c39bd 100644
--- a/vcl/unx/gtk/a11y/atkutil.cxx
+++ b/vcl/unx/gtk/a11y/atkutil.cxx
@@ -742,14 +742,14 @@ ooo_atk_util_get_type()
         static const GTypeInfo typeInfo =
         {
             static_cast<guint16>(type_query.class_size),
-            (GBaseInitFunc) NULL,
-            (GBaseFinalizeFunc) NULL,
+            nullptr,
+            nullptr,
             reinterpret_cast<GClassInitFunc>(ooo_atk_util_class_init),
-            (GClassFinalizeFunc) NULL,
+            nullptr,
             NULL,
             static_cast<guint16>(type_query.instance_size),
             0,
-            (GInstanceInitFunc) NULL,
+            nullptr,
             NULL
         } ;
 
diff --git a/vcl/unx/gtk/a11y/atkwindow.cxx b/vcl/unx/gtk/a11y/atkwindow.cxx
index b845389c6437..635645f234e3 100644
--- a/vcl/unx/gtk/a11y/atkwindow.cxx
+++ b/vcl/unx/gtk/a11y/atkwindow.cxx
@@ -293,14 +293,14 @@ ooo_window_wrapper_get_type()
         static const GTypeInfo typeInfo =
         {
             static_cast<guint16>(type_query.class_size),
-            (GBaseInitFunc) NULL,
-            (GBaseFinalizeFunc) NULL,
+            nullptr,
+            nullptr,
             reinterpret_cast<GClassInitFunc>(ooo_window_wrapper_class_init),
-            (GClassFinalizeFunc) NULL,
+            nullptr,
             NULL,
             static_cast<guint16>(type_query.instance_size),
             0,
-            (GInstanceInitFunc) NULL,
+            nullptr,
             NULL
         } ;
 
diff --git a/vcl/unx/gtk/a11y/atkwrapper.cxx b/vcl/unx/gtk/a11y/atkwrapper.cxx
index 30cfa9c05074..ad27b6a3c6ff 100644
--- a/vcl/unx/gtk/a11y/atkwrapper.cxx
+++ b/vcl/unx/gtk/a11y/atkwrapper.cxx
@@ -665,10 +665,10 @@ atk_object_wrapper_get_type()
       static const GTypeInfo typeInfo =
       {
         sizeof (AtkObjectWrapperClass),
-        (GBaseInitFunc) NULL,
-        (GBaseFinalizeFunc) NULL,
+        nullptr,
+        nullptr,
         reinterpret_cast<GClassInitFunc>(atk_object_wrapper_class_init),
-        (GClassFinalizeFunc) NULL,
+        nullptr,
         NULL,
         sizeof (AtkObjectWrapper),
         0,
diff --git a/vcl/unx/gtk/app/gtkdata.cxx b/vcl/unx/gtk/app/gtkdata.cxx
index df1546ac9e43..df4470ba09ba 100644
--- a/vcl/unx/gtk/app/gtkdata.cxx
+++ b/vcl/unx/gtk/app/gtkdata.cxx
@@ -964,7 +964,7 @@ void GtkData::PostUserEvent()
         g_source_set_priority (m_pUserEvent, G_PRIORITY_HIGH);
         g_source_set_can_recurse (m_pUserEvent, TRUE);
         g_source_set_callback (m_pUserEvent, call_userEventFn,
-                               (gpointer) this, NULL);
+                               static_cast<gpointer>(this), NULL);
         g_source_attach (m_pUserEvent, g_main_context_default ());
     }
 }
diff --git a/vcl/unx/gtk/fpicker/SalGtkFilePicker.cxx b/vcl/unx/gtk/fpicker/SalGtkFilePicker.cxx
index 6c98ca6f72bf..d6e082fd4eb4 100644
--- a/vcl/unx/gtk/fpicker/SalGtkFilePicker.cxx
+++ b/vcl/unx/gtk/fpicker/SalGtkFilePicker.cxx
@@ -122,7 +122,7 @@ SalGtkFilePicker::SalGtkFilePicker( const uno::Reference< uno::XComponentContext
             GTK_FILE_CHOOSER_ACTION_OPEN,
             GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
             GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
-            (char *)NULL );
+            nullptr );
 
     gtk_dialog_set_default_response( GTK_DIALOG (m_pDialog), GTK_RESPONSE_ACCEPT );
 
@@ -240,7 +240,7 @@ SalGtkFilePicker::SalGtkFilePicker( const uno::Reference< uno::XComponentContext
         cell = gtk_cell_renderer_text_new ();
         gtk_tree_view_column_set_expand (column, true);
         gtk_tree_view_column_pack_start (column, cell, false);
-        gtk_tree_view_column_set_attributes (column, cell, "text", i, (char *)NULL);
+        gtk_tree_view_column_set_attributes (column, cell, "text", i, nullptr);
         gtk_tree_view_append_column (GTK_TREE_VIEW(m_pFilterView), column);
     }
 
@@ -272,7 +272,7 @@ SalGtkFilePicker::SalGtkFilePicker( const uno::Reference< uno::XComponentContext
     pango_layout_get_pixel_extents (layout, NULL, &row_height);
     g_object_unref (layout);
 
-    g_object_get (cell, "ypad", &ypad, (char *)NULL);
+    g_object_get (cell, "ypad", &ypad, nullptr);
     guint height = (row_height.height + 2*ypad) * 5;
     gtk_widget_set_size_request (m_pFilterView, -1, height);
     gtk_widget_set_size_request (m_pPreview, 1, height);
@@ -896,11 +896,11 @@ sal_Int16 SAL_CALL SalGtkFilePicker::execute() throw( uno::RuntimeException, std
 
     mnHID_FolderChange =
         g_signal_connect( GTK_FILE_CHOOSER( m_pDialog ), "current-folder-changed",
-            G_CALLBACK( folder_changed_cb ), ( gpointer )this );
+            G_CALLBACK( folder_changed_cb ), static_cast<gpointer>(this) );
 
     mnHID_SelectionChange =
         g_signal_connect( GTK_FILE_CHOOSER( m_pDialog ), "selection-changed",
-            G_CALLBACK( selection_changed_cb ), ( gpointer )this );
+            G_CALLBACK( selection_changed_cb ), static_cast<gpointer>(this) );
 
     int btn = GTK_RESPONSE_NO;
 
@@ -1352,7 +1352,7 @@ void SAL_CALL SalGtkFilePicker::setLabel( sal_Int16 nControlId, const OUString&
     }
     else if( tType == GTK_TYPE_TOGGLE_BUTTON || tType == GTK_TYPE_BUTTON || tType == GTK_TYPE_LABEL )
         g_object_set( pWidget, "label", aTxt.getStr(),
-                      "use_underline", true, (char *)NULL );
+                      "use_underline", true, nullptr );
     else
         OSL_TRACE("Can't set label on list");
 }
@@ -1535,7 +1535,7 @@ sal_Bool SAL_CALL SalGtkFilePicker::setShowState( sal_Bool bShowState ) throw( u
             {
                 mHID_Preview = g_signal_connect(
                     GTK_FILE_CHOOSER( m_pDialog ), "update-preview",
-                    G_CALLBACK( update_preview_cb ), ( gpointer )this );
+                    G_CALLBACK( update_preview_cb ), static_cast<gpointer>(this) );
             }
             gtk_widget_show( m_pPreview );
         }
@@ -1823,7 +1823,7 @@ GtkFileFilter* SalGtkFilePicker::implAddFilter( const OUString& rFilter, const O
                 gtk_file_filter_add_custom (filter, GTK_FILE_FILTER_URI,
                     case_insensitive_filter,
                     g_strdup( OUStringToOString(aToken, RTL_TEXTENCODING_UTF8).getStr() ),
-                    (GDestroyNotify) g_free );
+                    g_free );
 
                 OSL_TRACE( "fustering with %s", OUStringToOString( aToken, RTL_TEXTENCODING_UTF8 ).getStr());
             }
diff --git a/vcl/unx/gtk/fpicker/SalGtkFolderPicker.cxx b/vcl/unx/gtk/fpicker/SalGtkFolderPicker.cxx
index 0754101b3631..3a2fc6caf93f 100644
--- a/vcl/unx/gtk/fpicker/SalGtkFolderPicker.cxx
+++ b/vcl/unx/gtk/fpicker/SalGtkFolderPicker.cxx
@@ -54,7 +54,7 @@ SalGtkFolderPicker::SalGtkFolderPicker( const uno::Reference< uno::XComponentCon
     m_pDialog = gtk_file_chooser_dialog_new(
         OUStringToOString( getResString( FOLDERPICKER_TITLE ), RTL_TEXTENCODING_UTF8 ).getStr(),
         NULL, GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER, GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
-        GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, (char *)NULL );
+        GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, nullptr );
 
     gtk_dialog_set_default_response( GTK_DIALOG (m_pDialog), GTK_RESPONSE_ACCEPT );
 #if ENABLE_GNOME_VFS || ENABLE_GIO
diff --git a/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx b/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx
index a34c143b99f9..463d9fe00ced 100644
--- a/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx
+++ b/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx
@@ -529,10 +529,10 @@ void GtkData::initNWF()
     gint vertical_padding = 1;
     gtk_widget_style_get( gWidgetData[0].gMenuWidget,
             "horizontal-padding", &horizontal_padding,
-            (char *)NULL);
+            nullptr);
     gtk_widget_style_get( gWidgetData[0].gMenuWidget,
             "vertical-padding", &vertical_padding,
-            (char *)NULL);
+            nullptr);
     gint xthickness = gWidgetData[0].gMenuWidget->style->xthickness;
     gint ythickness = gWidgetData[0].gMenuWidget->style->ythickness;
     pSVData->maNWFData.mnMenuFormatBorderX = xthickness + horizontal_padding;
@@ -774,7 +774,7 @@ bool GtkSalGraphics::hitTestNativeControl( ControlType        nType,
                               "has-secondary-forward-stepper", &has_forward2,
                               "has-backward-stepper", &has_backward,
                               "has-secondary-backward-stepper", &has_backward2,
-                              (char *)NULL );
+                              nullptr );
         Rectangle aForward;
         Rectangle aBackward;
 
@@ -1199,7 +1199,7 @@ bool GtkSalGraphics::getNativeControlRegion(  ControlType nType,
                 gWidgetData[m_nXScreen].gMenuItemCheckMenuWidget : gWidgetData[m_nXScreen].gMenuItemRadioMenuWidget;
             gtk_widget_style_get( pWidget,
                                   "indicator_size", &indicator_size,
-                                  (char *)NULL );
+                                  nullptr );
             rNativeBoundingRegion = rControlRegion;
             Rectangle aIndicatorRect( Point( 0,
                                              (rControlRegion.GetHeight()-indicator_size)/2),
@@ -1263,7 +1263,7 @@ bool GtkSalGraphics::getNativeControlRegion(  ControlType nType,
                               "indicator_spacing", &indicator_spacing,
                               "focus-line-width", &focusWidth,
                               "focus-padding", &focusPad,
-                              (char *)NULL);
+                              nullptr);
         indicator_size += 2*indicator_spacing + 2*(focusWidth + focusWidth);
         rNativeBoundingRegion = rControlRegion;
         Rectangle aIndicatorRect( Point( 0,
@@ -1295,7 +1295,7 @@ bool GtkSalGraphics::getNativeControlRegion(  ControlType nType,
         gtk_widget_style_get( widget,
                               "slider-width", &slider_width,
                               "slider-length", &slider_length,
-                              (char *)NULL);
+                              nullptr);
         Rectangle aRect( rControlRegion );
         if( nPart == PART_THUMB_HORZ )
         {
@@ -1642,10 +1642,10 @@ bool GtkSalGraphics::NWPaintGTKButtonReal(
     gtk_widget_style_get( gWidgetData[m_nXScreen].gBtnWidget,    "focus-line-width",    &focusWidth,
                                 "focus-padding",     &focusPad,
                                  "interior_focus",    &interiorFocus,
-                                (char *)NULL );
+                                nullptr );
     gtk_widget_style_get( gWidgetData[m_nXScreen].gBtnWidget,
                                 "default_border",    &pBorder,
-                                (char *)NULL );
+                                nullptr );
 
     // Make sure the border values exist, otherwise use some defaults
     if ( pBorder )
@@ -1748,7 +1748,7 @@ static Rectangle NWGetButtonArea( SalX11Screen nScreen,
                                 "focus-padding",     &focusPad,
                                  "interior_focus",    &interiorFocus,
                                 "default_border",    &pBorder,
-                                (char *)NULL );
+                                nullptr );
 
     // Make sure the border values exist, otherwise use some defaults
     if ( pBorder )
@@ -1821,7 +1821,7 @@ bool GtkSalGraphics::NWPaintGTKRadio( GdkDrawable* gdkDrawable,
     NWConvertVCLStateToGTKState( nState, &stateType, &shadowType );
 
     gint indicator_size;
-    gtk_widget_style_get( gWidgetData[m_nXScreen].gRadioWidget, "indicator_size", &indicator_size, (char *)NULL);
+    gtk_widget_style_get( gWidgetData[m_nXScreen].gRadioWidget, "indicator_size", &indicator_size, nullptr);
 
     x = rControlRectangle.Left() + (rControlRectangle.GetWidth()-indicator_size)/2;
     y = rControlRectangle.Top() + (rControlRectangle.GetHeight()-indicator_size)/2;
@@ -1878,7 +1878,7 @@ bool GtkSalGraphics::NWPaintGTKCheck( GdkDrawable* gdkDrawable,
     NWConvertVCLStateToGTKState( nState, &stateType, &shadowType );
 
     gint indicator_size;
-    gtk_widget_style_get( gWidgetData[m_nXScreen].gCheckWidget, "indicator_size", &indicator_size, (char *)NULL);
+    gtk_widget_style_get( gWidgetData[m_nXScreen].gCheckWidget, "indicator_size", &indicator_size, nullptr);
 
     x = rControlRectangle.Left() + (rControlRectangle.GetWidth()-indicator_size)/2;
     y = rControlRectangle.Top() + (rControlRectangle.GetHeight()-indicator_size)/2;
@@ -1976,7 +1976,7 @@ bool GtkSalGraphics::NWPaintGTKScrollbar( ControlType, ControlPart nPart,
                                       "stepper_size", &stepper_size,
                                       "trough_border", &trough_border,
                                       "stepper_spacing", &stepper_spacing,
-                                      "min_slider_length", &min_slider_length, (char *)NULL );
+                                      "min_slider_length", &min_slider_length, nullptr );
     gboolean has_forward;
     gboolean has_forward2;
     gboolean has_backward;
@@ -1985,7 +1985,7 @@ bool GtkSalGraphics::NWPaintGTKScrollbar( ControlType, ControlPart nPart,
     gtk_widget_style_get( gWidgetData[m_nXScreen].gScrollHorizWidget, "has-forward-stepper", &has_forward,
                                       "has-secondary-forward-stepper", &has_forward2,
                                       "has-backward-stepper", &has_backward,
-                                         "has-secondary-backward-stepper", &has_backward2, (char *)NULL );
+                                         "has-secondary-backward-stepper", &has_backward2, nullptr );
     gint magic = trough_border ? 1 : 0;
     gint nFirst = 0;
 
@@ -2253,7 +2253,7 @@ static Rectangle NWGetScrollButtonRect(    SalX11Screen nScreen, ControlPart nPa
                                       "slider-width", &slider_width,
                                       "stepper-size", &stepper_size,
                                       "trough-border", &trough_border,
-                                         "stepper-spacing", &stepper_spacing, (char *)NULL );
+                                         "stepper-spacing", &stepper_spacing, nullptr );
 
     gboolean has_forward;
     gboolean has_forward2;
@@ -2264,7 +2264,7 @@ static Rectangle NWGetScrollButtonRect(    SalX11Screen nScreen, ControlPart nPa
                                       "has-forward-stepper", &has_forward,
                                       "has-secondary-forward-stepper", &has_forward2,
                                       "has-backward-stepper", &has_backward,
-                                         "has-secondary-backward-stepper", &has_backward2, (char *)NULL );
+                                         "has-secondary-backward-stepper", &has_backward2, nullptr );
     gint       buttonWidth;
     gint       buttonHeight;
     Rectangle  buttonRect;
@@ -2369,7 +2369,7 @@ static Rectangle NWGetEditBoxPixmapRect(SalX11Screen nScreen,
     // Grab some entry style attributes
     gtk_widget_style_get( gWidgetData[nScreen].gEditBoxWidget,
                                     "focus-line-width",    &focusWidth,
-                                     "interior-focus",    &interiorFocus, (char *)NULL );
+                                     "interior-focus",    &interiorFocus, nullptr );
 
     if ( !interiorFocus )
     {
@@ -2435,7 +2435,7 @@ static void NWPaintOneEditBox(    SalX11Screen nScreen,
     gtk_widget_style_get( widget,
         "interior-focus",   &bInteriorFocus,
         "focus-line-width", &nFocusLineWidth,
-        (char *)NULL);
+        nullptr);
     if ( !bInteriorFocus )
     {
         xborder += nFocusLineWidth;
@@ -2527,7 +2527,7 @@ bool GtkSalGraphics::NWPaintGTKSpinBox( ControlType nType, ControlPart nPart,
         }
 
         NWSetWidgetState( gWidgetData[m_nXScreen].gSpinButtonWidget, nState, stateType );
-        gtk_widget_style_get( gWidgetData[m_nXScreen].gSpinButtonWidget, "shadow_type", &shadowType, (char *)NULL );
+        gtk_widget_style_get( gWidgetData[m_nXScreen].gSpinButtonWidget, "shadow_type", &shadowType, nullptr );
 
         if ( shadowType != GTK_SHADOW_NONE )
         {
@@ -2734,7 +2734,7 @@ static Rectangle NWGetComboBoxButtonRect( SalX11Screen nScreen,
     // Grab some button style attributes
     gtk_widget_style_get( gWidgetData[nScreen].gDropdownWidget,
                                       "focus-line-width",    &nFocusWidth,
-                                    "focus-padding",     &nFocusPad, (char *)NULL );
+                                    "focus-padding",     &nFocusPad, nullptr );
 
     nArrowWidth = MIN_ARROW_SIZE + (GTK_MISC(gWidgetData[nScreen].gArrowWidget)->xpad * 2);
     nButtonWidth = nArrowWidth +
@@ -2961,7 +2961,7 @@ bool GtkSalGraphics::NWPaintGTKListBox( GdkDrawable* gdkDrawable,
             "interior_focus",    &bInteriorFocus,
             "focus_line_width",    &nFocusLineWidth,
             "focus_padding",    &nFocusPadding,
-            (char *)NULL);
+            nullptr);
     }
 
     for( clipList::const_iterator it = rClipList.begin(); it != rClipList.end(); ++it )
@@ -3200,7 +3200,7 @@ bool GtkSalGraphics::NWPaintGTKMenubar(
         {
             gtk_widget_style_get( gWidgetData[m_nXScreen].gMenuItemMenubarWidget,
                                   "selected_shadow_type", &selected_shadow_type,
-                                  (char *)NULL);
+                                  nullptr);
         }
     }
 
@@ -3291,7 +3291,7 @@ bool GtkSalGraphics::NWPaintGTKPopupMenu(
     {
         gtk_widget_style_get( gWidgetData[m_nXScreen].gMenuItemMenuWidget,
                               "selected_shadow_type", &selected_shadow_type,
-                              (char *)NULL);
+                              nullptr);
     }
 
     NWSetWidgetState( gWidgetData[m_nXScreen].gMenuWidget, nState, stateType );
@@ -3685,7 +3685,7 @@ static Rectangle NWGetListBoxButtonRect( SalX11Screen nScreen,
 
     gtk_widget_style_get( gWidgetData[nScreen].gOptionMenuWidget,
             "indicator_size",    &pIndicatorSize,
-            "indicator_spacing",&pIndicatorSpacing, (char *)NULL);
+            "indicator_spacing",&pIndicatorSpacing, nullptr);
 
     if ( pIndicatorSize )
         width = pIndicatorSize->width;
@@ -3748,7 +3748,7 @@ static Rectangle NWGetListBoxIndicatorRect( SalX11Screen nScreen,
 
     gtk_widget_style_get( gWidgetData[nScreen].gOptionMenuWidget,
             "indicator_size",    &pIndicatorSize,
-            "indicator_spacing",&pIndicatorSpacing, (char *)NULL);
+            "indicator_spacing",&pIndicatorSpacing, nullptr);
 
     if ( pIndicatorSize )
     {
@@ -3868,7 +3868,7 @@ void GtkSalGraphics::refreshFontconfig( GtkSettings *pSettings )
 {
     guint latest_fontconfig_timestamp = 0;
     static guint our_fontconfig_timestamp = 0;
-    g_object_get( pSettings, "gtk-fontconfig-timestamp", &latest_fontconfig_timestamp, (char *)NULL );
+    g_object_get( pSettings, "gtk-fontconfig-timestamp", &latest_fontconfig_timestamp, nullptr );
     if (latest_fontconfig_timestamp != our_fontconfig_timestamp)
     {
         bool bFirstTime = our_fontconfig_timestamp == 0;
@@ -4147,11 +4147,11 @@ void GtkSalGraphics::updateSettings( AllSettings& rSettings )
     // get cursor blink time
     gboolean blink = false;
 
-    g_object_get( pSettings, "gtk-cursor-blink", &blink, (char *)NULL );
+    g_object_get( pSettings, "gtk-cursor-blink", &blink, nullptr );
     if( blink )
     {
         gint blink_time = static_cast<gint>(STYLE_CURSOR_NOBLINKTIME);
-        g_object_get( pSettings, "gtk-cursor-blink-time", &blink_time, (char *)NULL );
+        g_object_get( pSettings, "gtk-cursor-blink-time", &blink_time, nullptr );
         // set the blink_time if there is a setting and it is reasonable
         // else leave the default value
         if( blink_time > 100 && blink_time != gint(STYLE_CURSOR_NOBLINKTIME) )
@@ -4167,7 +4167,7 @@ void GtkSalGraphics::updateSettings( AllSettings& rSettings )
                   "gtk-double-click-distance", &iDoubleClickDistance,
                   "gtk-dnd-drag-threshold", &iDragThreshold,
                   "gtk-menu-popup-delay", &iMenuPopupDelay,
-                  (char *)NULL );
+                  nullptr );
     aMouseSettings.SetDoubleClickTime( iDoubleClickTime );
     aMouseSettings.SetDoubleClickWidth( iDoubleClickDistance );
     aMouseSettings.SetDoubleClickHeight( iDoubleClickDistance );
@@ -4179,13 +4179,13 @@ void GtkSalGraphics::updateSettings( AllSettings& rSettings )
     gboolean showmenuicons = true, primarybuttonwarps = false;
     g_object_get( pSettings,
         "gtk-menu-images", &showmenuicons,
-        (char *)NULL );
+        nullptr );
     if( g_object_class_find_property(
             G_OBJECT_GET_CLASS(pSettings), "gtk-primary-button-warps-slider") )
     {
         g_object_get( pSettings,
             "gtk-primary-button-warps-slider", &primarybuttonwarps,
-            (char *)NULL );
+            nullptr );
     }
     aStyleSet.SetPreferredUseImagesInMenus(showmenuicons);
     aStyleSet.SetPrimaryButtonWarpsSlider(primarybuttonwarps);
@@ -4200,14 +4200,14 @@ void GtkSalGraphics::updateSettings( AllSettings& rSettings )
                           "slider-width", &slider_width,
                           "trough-border", &trough_border,
                           "min-slider-length", &min_slider_length,
-                          (char *)NULL );
+                          nullptr );
     gint magic = trough_border ? 1 : 0;
     aStyleSet.SetScrollBarSize( slider_width + 2*trough_border );
     aStyleSet.SetMinThumbSize( min_slider_length - magic );
 
     // preferred icon style
     gchar* pIconThemeName = NULL;
-    g_object_get( pSettings, "gtk-icon-theme-name", &pIconThemeName, (char *)NULL );
+    g_object_get( pSettings, "gtk-icon-theme-name", &pIconThemeName, nullptr );
     aStyleSet.SetPreferredIconTheme( OUString::createFromAscii( pIconThemeName ) );
     g_free( pIconThemeName );
 
@@ -4322,7 +4322,7 @@ static void NWAddWidgetToCacheWindow( GtkWidget* widget, SalX11Screen nScreen )
         {
             rData.gCacheWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
             g_object_set_data( G_OBJECT( rData.gCacheWindow ), "libo-version",
-                               (gpointer)LIBO_VERSION_DOTTED );
+                               const_cast<char *>(LIBO_VERSION_DOTTED) );
 
             GdkScreen* pScreen = gdk_display_get_screen( gdk_display_get_default(),
                                                          nScreen.getXScreen() );
@@ -4487,7 +4487,7 @@ static void NWEnsureGTKToolbar( SalX11Screen nScreen )
         gtk_widget_ensure_style( gWidgetData[nScreen].gToolbarWidget );
         gtk_widget_style_get( gWidgetData[nScreen].gToolbarWidget,
                               "button_relief", &aRelief,
-                              (char *)NULL);
+                              nullptr);
 
         gtk_button_set_relief( GTK_BUTTON(gWidgetData[nScreen].gToolbarButtonWidget), aRelief );
         GTK_WIDGET_UNSET_FLAGS( gWidgetData[nScreen].gToolbarButtonWidget, GTK_CAN_FOCUS );
diff --git a/vcl/unx/gtk/window/gtksalframe.cxx b/vcl/unx/gtk/window/gtksalframe.cxx
index 874f250b0b16..e590a8ab1bcd 100644
--- a/vcl/unx/gtk/window/gtksalframe.cxx
+++ b/vcl/unx/gtk/window/gtksalframe.cxx
@@ -956,14 +956,14 @@ ooo_fixed_get_type()
         static const GTypeInfo tinfo =
         {
             sizeof (GtkFixedClass),
-            (GBaseInitFunc) NULL,      /* base init */
-            (GBaseFinalizeFunc) NULL,  /* base finalize */
-            (GClassInitFunc) NULL,     /* class init */
-            (GClassFinalizeFunc) NULL, /* class finalize */
+            nullptr,      /* base init */
+            nullptr,  /* base finalize */
+            nullptr,     /* class init */
+            nullptr, /* class finalize */
             NULL,                      /* class data */
             sizeof (GtkFixed),         /* instance size */
             0,                         /* nb preallocs */
-            (GInstanceInitFunc) NULL,  /* instance init */
+            nullptr,  /* instance init */
             NULL                       /* value table */
         };
 
@@ -1296,7 +1296,7 @@ void GtkSalFrame::Init( SalFrame* pParent, sal_uLong nStyle )
         m_pWindow = gtk_widget_new( GTK_TYPE_WINDOW, "type", eWinType,
                                     "visible", FALSE, NULL );
     g_object_set_data( G_OBJECT( m_pWindow ), "SalFrame", this );
-    g_object_set_data( G_OBJECT( m_pWindow ), "libo-version", (gpointer)LIBO_VERSION_DOTTED);
+    g_object_set_data( G_OBJECT( m_pWindow ), "libo-version", const_cast<char *>(LIBO_VERSION_DOTTED));
 
     // force wm class hint
     m_nExtStyle = ~0;
@@ -4048,7 +4048,7 @@ void GtkSalFrame::IMHandler::doCallEndExtTextInput()
 void GtkSalFrame::IMHandler::updateIMSpotLocation()
 {
     SalExtTextInputPosEvent aPosEvent;
-    m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUTPOS, (void*)&aPosEvent );
+    m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUTPOS, static_cast<void*>(&aPosEvent) );
     GdkRectangle aArea;
     aArea.x = aPosEvent.mnX;
     aArea.y = aPosEvent.mnY;
@@ -4070,7 +4070,7 @@ void GtkSalFrame::IMHandler::sendEmptyCommit()
     aEmptyEv.mnCursorPos        = 0;
     aEmptyEv.mnCursorFlags      = 0;
     aEmptyEv.mbOnlyCursor       = False;
-    m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUT, (void*)&aEmptyEv );
+    m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUT, static_cast<void*>(&aEmptyEv) );
     if( ! aDel.isDeleted() )
         m_pFrame->CallCallback( SALEVENT_ENDEXTTEXTINPUT, NULL );
 }
@@ -4289,7 +4289,7 @@ void GtkSalFrame::IMHandler::signalIMCommit( GtkIMContext* pContext, gchar* pTex
         }
         if( ! bSingleCommit )
         {
-            pThis->m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUT, (void*)&pThis->m_aInputEvent);
+            pThis->m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUT, static_cast<void*>(&pThis->m_aInputEvent));
             if( ! aDel.isDeleted() )
                 pThis->doCallEndExtTextInput();
         }
@@ -4413,7 +4413,7 @@ void GtkSalFrame::IMHandler::signalIMPreeditChanged( GtkIMContext*, gpointer im_
     SolarMutexGuard aGuard;
     vcl::DeletionListener aDel( pThis->m_pFrame );
 
-    pThis->m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUT, (void*)&pThis->m_aInputEvent);
+    pThis->m_pFrame->CallCallback( SALEVENT_EXTTEXTINPUT, static_cast<void*>(&pThis->m_aInputEvent));
     if( bEndPreedit && ! aDel.isDeleted() )
         pThis->doCallEndExtTextInput();
     if( ! aDel.isDeleted() )
diff --git a/vcl/unx/gtk/window/hudawareness.cxx b/vcl/unx/gtk/window/hudawareness.cxx
index 947f404f9d52..760103314d7c 100644
--- a/vcl/unx/gtk/window/hudawareness.cxx
+++ b/vcl/unx/gtk/window/hudawareness.cxx
@@ -61,7 +61,7 @@ hud_awareness_register (GDBusConnection       *connection,
   HudAwarenessHandle *handle;
   guint object_id;
 
-  memset ((void *)&vtable, 0, sizeof (vtable));
+  memset (static_cast<void *>(&vtable), 0, sizeof (vtable));
   vtable.method_call = hud_awareness_method_call;
 
   if G_UNLIKELY (iface == NULL)