diff -r 7ada3db4cfa8 -r 9af327d0e0e4 ui/gtk/draw_cairo.c
--- a/ui/gtk/draw_cairo.c	Fri Jun 14 18:24:31 2024 +0200
+++ b/ui/gtk/draw_cairo.c	Sun Jun 16 11:36:27 2024 +0200
@@ -33,11 +33,16 @@
 
 #include "draw_cairo.h"
 
-#ifdef UI_GTK3
+#if UI_GTK3 || UI_GTK4
 gboolean ui_drawingarea_expose(GtkWidget *w, cairo_t *cr, void *data) {
     UiCairoGraphics g;
+#ifdef UI_GTK4
+    g.g.width = gtk_widget_get_width(w);
+    g.g.height = gtk_widget_get_height(w);
+#else
     g.g.width = gtk_widget_get_allocated_width(w);
     g.g.height = gtk_widget_get_allocated_height(w);
+#endif
     g.widget = w;
     g.cr = cr;
     
@@ -51,7 +56,8 @@
     
     return FALSE;
 }
-#else
+#endif
+#ifdef UI_GTK2
 gboolean ui_canvas_expose(GtkWidget *w, GdkEventExpose *e, void *data) {
     UiCairoGraphics g;
     g.g.width = w->allocation.width;
@@ -74,7 +80,7 @@
 // function from graphics.h
 
 void ui_connect_draw_handler(GtkWidget *widget, UiDrawEvent *event) {
-#ifdef UI_GTK3
+#if UI_GTK3 || UI_GTK4
     g_signal_connect(G_OBJECT(widget),
             "draw",
             G_CALLBACK(ui_drawingarea_expose),