[libnma/lr/gtk-4.0: 4/7] bar-code-widget: port to Gtk4

[Lubomir Rintel <lkundrak src gnome org>]

commit b5dbb5c6775fd56d4ee7687ef8e78d4902103652
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Thu Oct 7 13:50:55 2021 +0200

    bar-code-widget: port to Gtk4
    
    Drawing is handled differently in Gtk4.

 src/nma-bar-code-widget.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)
---
diff --git a/src/nma-bar-code-widget.c b/src/nma-bar-code-widget.c
index 5192b258..67c519bd 100644
--- a/src/nma-bar-code-widget.c
+++ b/src/nma-bar-code-widget.c
@@ -12,7 +12,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
- * Copyright 2018, 2019 Red Hat, Inc.
+ * Copyright (C) 2018 - 2021 Red Hat, Inc.
  */
 
 #include "nm-default.h"
@@ -62,8 +62,8 @@ enum {
                                      NMABarCodeWidgetPrivate))
 
 static void
-do_qr_code_draw (GtkDrawingArea *area, cairo_t *cr, int width, int height,
-                 gpointer user_data)
+qr_code_draw (GtkDrawingArea *area, cairo_t *cr, int width, int height,
+              gpointer user_data)
 {
        NMABarCodeWidgetPrivate *priv = NMA_BAR_CODE_WIDGET_GET_PRIVATE (user_data);
        int size = nma_bar_code_get_size (priv->qr);
@@ -80,16 +80,18 @@ do_qr_code_draw (GtkDrawingArea *area, cairo_t *cr, int width, int height,
        nma_bar_code_draw (priv->qr, cr);
 }
 
+#if !GTK_CHECK_VERSION(4,0,0)
 static gboolean
-qr_code_draw (GtkWidget *widget, cairo_t *cr, gpointer user_data)
+qr_code_draw_cb (GtkWidget *widget, cairo_t *cr, gpointer user_data)
 {
-       do_qr_code_draw (GTK_DRAWING_AREA (widget), cr,
-                        gtk_widget_get_allocated_width (widget),
-                        gtk_widget_get_allocated_height (widget),
-                        user_data);
+       qr_code_draw (GTK_DRAWING_AREA (widget), cr,
+                     gtk_widget_get_allocated_width (widget),
+                     gtk_widget_get_allocated_height (widget),
+                     user_data);
 
        return TRUE;
 }
+#endif
 
 static char *
 shell_escape (const char *to_escape)
@@ -407,7 +409,12 @@ nma_bar_code_widget_init (NMABarCodeWidget *self)
        gtk_widget_init_template (GTK_WIDGET (self));
 
        priv->qr = nma_bar_code_new (NULL);
-       g_signal_connect (priv->qr_code, "draw", G_CALLBACK (qr_code_draw), self);
+#if GTK_CHECK_VERSION(4,0,0)
+       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (priv->qr_code),
+                                       qr_code_draw, self, NULL);
+#else
+       g_signal_connect (priv->qr_code, "draw", G_CALLBACK (qr_code_draw_cb), self);
+#endif
 }
 
 /**