fix last deprecated code

Thanks https://stackoverflow.com/questions/70655268/drawing-to-gtk-gdk-drawing-area-with-cairo#70658500

src/x49gpng/ui.c

@@ -983,6 +983,14 @@ static inline int _tiny_text_width( const char* text )
 
 static int _tiny_text_height = 10;
 
+static void key_to_button( GtkWidget* button, bool is_press )
+{
+    GdkEventButton event = { .type = GDK_BUTTON_PRESS, .state = 0 };
+    static gboolean unused_but_needed_return_value;
+    g_signal_emit_by_name( GTK_BUTTON( button ), is_press ? "button-press-event" : "button-release-event", &event,
+                           &unused_but_needed_return_value );
+}
+
 static gboolean react_to_button_press( GtkWidget* widget, GdkEventButton* event, gpointer user_data )
 {
     x49gp_ui_button_t* button = user_data;
@@ -1008,7 +1016,7 @@ static gboolean react_to_button_press( GtkWidget* widget, GdkEventButton* event,
             button->hold = true;
             if ( button->down )
                 return false;
-            gtk_button_pressed( GTK_BUTTON( button->button ) );
+            key_to_button( button->button, true );
             button->down = true;
             break;
         default:
@@ -1032,7 +1040,7 @@ static void ui_release_button( x49gp_ui_button_t* button, x49gp_ui_button_t* cau
 {
     x49gp_t* x49gp = button->x49gp;
     const x49gp_ui_key_t* key = button->key;
-    GtkButton* gtkbutton = GTK_BUTTON( button->button );
+    /* GtkButton* gtkbutton = GTK_BUTTON( button->button ); */
 
     /* #ifdef DEBUG_X49GP_UI */
     /*     printf( "%s: button %u: col %u, row %u, eint %u\n", __FUNCTION__, event->button, button->key->column, button->key->row, */
@@ -1044,7 +1052,7 @@ static void ui_release_button( x49gp_ui_button_t* button, x49gp_ui_button_t* cau
 
     /* if ( button != cause ) */
     /*     gtkbutton->in_button = false; */
-    gtk_button_released( gtkbutton );
+    key_to_button( button->button, false );
 
     if ( key->rowbit )
         s3c2410_io_port_g_update( x49gp, key->column, key->row, key->columnbit, key->rowbit, 0 );
@@ -1140,10 +1148,8 @@ static gboolean react_to_focus_lost( GtkWidget* widget, GdkEventFocus* event, gp
 
 static void ui_open_file_dialog( x49gp_t* x49gp, const char* prompt, GtkFileChooserAction action, char** filename )
 {
-    GtkWidget* dialog;
     x49gp_ui_t* ui = x49gp->ui;
-
-    dialog = gtk_file_chooser_dialog_new( prompt, GTK_WINDOW( ui->window ), action, GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, GTK_STOCK_OPEN,
+    GtkWidget* dialog = gtk_file_chooser_dialog_new( prompt, GTK_WINDOW( ui->window ), action, "_Cancel", GTK_RESPONSE_CANCEL, "_Open",
                                                      GTK_RESPONSE_ACCEPT, NULL );
 
     gtk_file_chooser_set_local_only( GTK_FILE_CHOOSER( dialog ), true );
@@ -1485,13 +1491,13 @@ static gboolean react_to_key_event( GtkWidget* widget, GdkEventKey* event, gpoin
             bev.type = GDK_BUTTON_PRESS;
             react_to_button_press( button->button, &bev, button );
             /* GTK_BUTTON( button->button )->in_button = true; */
-            gtk_button_pressed( GTK_BUTTON( button->button ) );
+            key_to_button( button->button, true );
             /* GTK_BUTTON( button->button )->in_button = save_in; */
             break;
         case GDK_KEY_RELEASE:
             bev.type = GDK_BUTTON_RELEASE;
             /* GTK_BUTTON( button->button )->in_button = true; */
-            gtk_button_released( GTK_BUTTON( button->button ) );
+            key_to_button( button->button, false );
             /* GTK_BUTTON( button->button )->in_button = save_in; */
             react_to_button_release( button->button, &bev, button );
             break;
@@ -1502,15 +1508,13 @@ static gboolean react_to_key_event( GtkWidget* widget, GdkEventKey* event, gpoin
     return true;
 }
 
-static int redraw_lcd( GtkWidget* widget, GdkEventExpose* event, gpointer user_data )
+static int redraw_lcd( GtkWidget* widget, cairo_t* cr, gpointer user_data )
 {
     x49gp_t* x49gp = user_data;
     x49gp_ui_t* ui = x49gp->ui;
 
-    cairo_t* cr = gdk_cairo_create( gtk_widget_get_window( widget ) );
     cairo_set_source_surface( cr, ui->lcd_surface, 0, 0 );
     cairo_paint( cr );
-    cairo_destroy( cr );
 
     return false;
 }