Redrawing a widget in gtk

Question

I am trying to redraw GtkDrawingArea using the gtk_widget_queue_draw function, but the widget is not redrawing.

Here, the gtk_widget_queue_draw code is inside a button callback function.

static gboolean click(GtkWidget *board,GdkEventButton *event,gpointer parentWindow){
    static int origen = -1;
    static int destino = -1;

    if(origen == -1){
        mapeo(&origen, event->x, event->y);
    }else{
       mapeo(&destino, event->x, event->y);
    if(!movimiento_fichas(JUGADOR_DOS, origen - 1, destino - 1)){
        dialogoMovInvalido(parentWindow); //displays a warning dialog
        g_print("%d %d", origen, destino); //debugging console output
        origen = -1; destino = -1;
    }else{
        g_print("%d %d", origen, destino); //debugging console output
        gtk_widget_queue_draw(board); //Here where the redrawing is supossed to occur.
       }
    }

    return 0;
}

Event-event callback

static gboolean onExposeEvent(GtkWidget *widget,GdkEventExpose *event,gpointer data){
    cairo_t *cr;
    cairo_surface_t *fondo;
    cairo_surface_t *ficha_roja;
    cairo_surface_t *ficha_blanca;

gint i,j;

cr = gdk_cairo_create(widget->window);

fondo = cairo_image_surface_create_from_png("interfaz.png");
ficha_roja = cairo_image_surface_create_from_png("ficha_roja.png");
ficha_blanca = cairo_image_surface_create_from_png("ficha_blanca.png");

cairo_set_source_surface(cr, fondo, 0, 0);
cairo_paint(cr);

for(i=0; i<24; i++){
    if(tablero[i].player == JUGADOR_UNO){
        cairo_set_source_surface(cr, ficha_blanca, posiciones[i].x, posiciones[i].y);
        for(j=1; j<=tablero[i].num; j++){
            cairo_paint(cr);
            cairo_set_source_surface(cr, ficha_blanca, posiciones[i].x, posiciones[i].y);
            if(i < 12)
                cairo_set_source_surface(cr, ficha_blanca, posiciones[i].x, posiciones[i].y - (j*25));
            else
                cairo_set_source_surface(cr, ficha_blanca, posiciones[i].x, posiciones[i].y + (j*25));
        }
    }else if(tablero[i].player == JUGADOR_DOS){
        cairo_set_source_surface(cr, ficha_roja, posiciones[i].x, posiciones[i].y);
        for(j=1; j<=tablero[i].num; j++){
            cairo_paint(cr);
            if(i < 12)
                cairo_set_source_surface(cr, ficha_roja, posiciones[i].x, posiciones[i].y - (j*25));
            else
                cairo_set_source_surface(cr, ficha_roja, posiciones[i].x, posiciones[i].y + (j*25));
        }
    }
}

cairo_destroy(cr);

return 0;
}

Expose-event and button-press-event connections (as inside a function that creates a top-level window).

  g_signal_connect(G_OBJECT(board),"expose-event",G_CALLBACK(onExposeEvent),NULL);
  g_signal_connect(G_OBJECT(board),"button-press-event",G_CALLBACK(click),window);

The main function.

int main(int argc, char *argv[]){
    gtk_init(&argc, &argv);

    mainWindow(); //Creates the main window

    gtk_main();

    return 0;
}

Answer 1

Found the answer, there is nothing wrong with the gtk code. The code specific to my program caused an error.

Answer 2

, , . , , /, .

• expose-event. , , , .
• . . , , . gtk_events_pending()/gtk_main_iteration().

, , board - , . , click().