gtkprogress.c

gtk是linux一款强大的夸平台的图形化开发工具

						   widget->allocation.height,
						   -1);
      GTK_PROGRESS_CLASS (GTK_OBJECT (progress)->klass)->paint (progress);
    }
}

static void
gtk_progress_value_changed (GtkAdjustment *adjustment,
			    GtkProgress   *progress)
{
  GTK_PROGRESS_CLASS (GTK_OBJECT (progress)->klass)->update (progress);
}

static gchar *
gtk_progress_build_string (GtkProgress *progress,
			   gfloat       value,
			   gfloat       percentage)
{
  gchar buf[256] = { 0 };
  gchar tmp[256] = { 0 };
  gchar *src;
  gchar *dest;
  gchar fmt[10];

  src = progress->format;
  dest = buf;
 
  while (src && *src)
    {
      if (*src != '%')
	{
	  *dest = *src;
	  dest++;
	}
      else
	{
	  gchar c;
	  gint digits;

	  c = *(src + sizeof(gchar));
	  digits = 0;

	  if (c >= '0' && c <= '2')
	    {
	      digits = (gint) (c - '0');
	      src++;
	      c = *(src + sizeof(gchar));
	    }

	  switch (c)
	    {
	    case '%':
	      *dest = '%';
	      src++;
	      dest++;
	      break;
	    case 'p':
	    case 'P':
	      if (digits)
		{
		  sprintf (fmt, "%%.%df", digits);
		  sprintf (tmp, fmt, 100 * percentage);
		}
	      else
		sprintf (tmp, "%.0f", 100 * percentage);
	      strcat (buf, tmp);
	      dest = &(buf[strlen (buf)]);
	      src++;
	      break;
	    case 'v':
	    case 'V':
	      if (digits)
		{
		  sprintf (fmt, "%%.%df", digits);
		  sprintf (tmp, fmt, value);
		}
	      else
		sprintf (tmp, "%.0f", value);
	      strcat (buf, tmp);
	      dest = &(buf[strlen (buf)]);
	      src++;
	      break;
	    case 'l':
	    case 'L':
	      if (digits)
		{
		  sprintf (fmt, "%%.%df", digits);
		  sprintf (tmp, fmt, progress->adjustment->lower);
		}
	      else
		sprintf (tmp, "%.0f", progress->adjustment->lower);
	      strcat (buf, tmp);
	      dest = &(buf[strlen (buf)]);
	      src++;
	      break;
	    case 'u':
	    case 'U':
	      if (digits)
		{
		  sprintf (fmt, "%%.%df", digits);
		  sprintf (tmp, fmt, progress->adjustment->upper);
		}
	      else
		sprintf (tmp, "%.0f", progress->adjustment->upper);
	      strcat (buf, tmp);
	      dest = &(buf[strlen (buf)]);
	      src++;
	      break;
	    default:
	      break;
	    }
	}
      src++;
    }

  return g_strdup (buf);
}

/***************************************************************/

void
gtk_progress_set_adjustment (GtkProgress   *progress,
			     GtkAdjustment *adjustment)
{
  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));
  if (adjustment)
    g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
  else
    adjustment = (GtkAdjustment*) gtk_adjustment_new (0, 0, 100, 0, 0, 0);

  if (progress->adjustment != adjustment)
    {
      if (progress->adjustment)
        {
          gtk_signal_disconnect_by_data (GTK_OBJECT (progress->adjustment),
                                         (gpointer) progress);
          gtk_object_unref (GTK_OBJECT (progress->adjustment));
        }
      progress->adjustment = adjustment;
      if (adjustment)
        {
          gtk_object_ref (GTK_OBJECT (adjustment));
	  gtk_object_sink (GTK_OBJECT (adjustment));
          gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
			      (GtkSignalFunc) gtk_progress_value_changed,
			      (gpointer) progress);
        }
    }
}

void
gtk_progress_configure (GtkProgress *progress,
			gfloat value,
			gfloat min,
			gfloat max)
{
  GtkAdjustment *adj;
  gboolean changed = FALSE;

  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));
  g_return_if_fail (min <= max);
  g_return_if_fail (value >= min && value <= max);

  adj = progress->adjustment;

  if (fabs (adj->lower - min) > EPSILON || fabs (adj->upper - max) > EPSILON)
    changed = TRUE;

  adj->value = value;
  adj->lower = min;
  adj->upper = max;

  gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
  if (changed)
    gtk_signal_emit_by_name (GTK_OBJECT (progress->adjustment), "changed");
}

void
gtk_progress_set_percentage (GtkProgress *progress,
			     gfloat       percentage)
{
  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));
  g_return_if_fail (percentage >= 0 && percentage <= 1.0);

  gtk_progress_set_value (progress, progress->adjustment->lower + percentage * 
		 (progress->adjustment->upper - progress->adjustment->lower));
}

gfloat
gtk_progress_get_current_percentage (GtkProgress *progress)
{
  g_return_val_if_fail (progress != NULL, 0);
  g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);

  return (progress->adjustment->value - progress->adjustment->lower) /
    (progress->adjustment->upper - progress->adjustment->lower);
}

gfloat
gtk_progress_get_percentage_from_value (GtkProgress *progress,
					gfloat       value)
{
  g_return_val_if_fail (progress != NULL, 0);
  g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);

  if (value >= progress->adjustment->lower &&
      value <= progress->adjustment->upper)
    return (value - progress->adjustment->lower) /
      (progress->adjustment->upper - progress->adjustment->lower);
  else
    return 0.0;
}

void
gtk_progress_set_value (GtkProgress *progress,
			gfloat       value)
{
  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));

  if (fabs (progress->adjustment->value - value) > EPSILON)
    gtk_adjustment_set_value (progress->adjustment, value);
}

gfloat
gtk_progress_get_value (GtkProgress *progress)
{
  g_return_val_if_fail (progress != NULL, 0);
  g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);

  return progress->adjustment->value;
}

void
gtk_progress_set_show_text (GtkProgress *progress,
			    gint        show_text)
{
  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));

  if (progress->show_text != show_text)
    {
      progress->show_text = show_text;

      if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
	gtk_widget_queue_resize (GTK_WIDGET (progress));
    }
}

void
gtk_progress_set_text_alignment (GtkProgress *progress,
				 gfloat       x_align,
				 gfloat       y_align)
{
  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));
  g_return_if_fail (x_align >= 0.0 && x_align <= 1.0);
  g_return_if_fail (y_align >= 0.0 && y_align <= 1.0);

  if (progress->x_align != x_align || progress->y_align != y_align)
    {
      progress->x_align = x_align;
      progress->y_align = y_align;

      if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
	gtk_widget_queue_resize (GTK_WIDGET (progress));
    }
}

void
gtk_progress_set_format_string (GtkProgress *progress,
				gchar       *format)
{
  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));

  if (format)
    {
      if (progress->format)
	g_free (progress->format);
      progress->format = g_strdup (format);

      if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
	gtk_widget_queue_resize (GTK_WIDGET (progress));
    }
}

gchar *
gtk_progress_get_current_text (GtkProgress *progress)
{
  g_return_val_if_fail (progress != NULL, 0);
  g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);

  return gtk_progress_build_string (progress, progress->adjustment->value,
		    gtk_progress_get_current_percentage (progress));
}

gchar *
gtk_progress_get_text_from_value (GtkProgress *progress,
				  gfloat       value)
{
  g_return_val_if_fail (progress != NULL, 0);
  g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);

  return gtk_progress_build_string (progress, value,
		    gtk_progress_get_percentage_from_value (progress, value));
}

void
gtk_progress_set_activity_mode (GtkProgress *progress,
				guint        activity_mode)
{
  g_return_if_fail (progress != NULL);
  g_return_if_fail (GTK_IS_PROGRESS (progress));

  if (progress->activity_mode != (activity_mode != 0))
    {
      progress->activity_mode = (activity_mode != 0);

      if (progress->activity_mode)
	GTK_PROGRESS_CLASS 
	  (GTK_OBJECT (progress)->klass)->act_mode_enter (progress);

      if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
	gtk_widget_queue_resize (GTK_WIDGET (progress));
    }
}