C++ (Cpp) gimp_ruler_draw_pos示例

示例#1

文件： gimpruler.c 项目： AjayRamanathan/gimp

static gboolean
gimp_ruler_expose (GtkWidget      *widget,
                   GdkEventExpose *event)
{
  if (gtk_widget_is_drawable (widget))
    {
      GimpRuler        *ruler = GIMP_RULER (widget);
      GimpRulerPrivate *priv  = GIMP_RULER_GET_PRIVATE (ruler);
      GtkAllocation     allocation;
      cairo_t          *cr;

      gimp_ruler_draw_ticks (ruler);

      cr = gdk_cairo_create (gtk_widget_get_window (widget));
      gdk_cairo_region (cr, event->region);
      cairo_clip (cr);

      gtk_widget_get_allocation (widget, &allocation);
      cairo_translate (cr, allocation.x, allocation.y);

      cairo_set_source_surface (cr, priv->backing_store, 0, 0);
      cairo_paint (cr);

      gimp_ruler_draw_pos (ruler);

      cairo_destroy (cr);
    }

  return FALSE;
}

示例#2

文件： gimpruler.c 项目： AjayRamanathan/gimp

/**
 * gimp_ruler_set_position:
 * @ruler: a #GimpRuler
 * @position: the position to set the ruler to
 *
 * This sets the position of the ruler.
 *
 * Since: GIMP 2.8
 */
void
gimp_ruler_set_position (GimpRuler *ruler,
                         gdouble    position)
{
  GimpRulerPrivate *priv;

  g_return_if_fail (GIMP_IS_RULER (ruler));

  priv = GIMP_RULER_GET_PRIVATE (ruler);

  if (priv->position != position)
    {
      priv->position = position;
      g_object_notify (G_OBJECT (ruler), "position");

      gimp_ruler_draw_pos (ruler);
    }
}

示例#3

static gboolean
gimp_ruler_draw (GtkWidget *widget,
                 cairo_t   *cr)
{
  GimpRuler        *ruler   = GIMP_RULER (widget);
  GimpRulerPrivate *priv    = GIMP_RULER_GET_PRIVATE (ruler);
  GtkStyleContext  *context = gtk_widget_get_style_context (widget);
  GtkAllocation     allocation;

  gtk_widget_get_allocation (widget, &allocation);
  gtk_render_background (context, cr, 0, 0, allocation.width, allocation.height);
  gtk_render_frame (context, cr, 0, 0, allocation.width, allocation.height);

  if (! priv->backing_store_valid)
    gimp_ruler_draw_ticks (ruler);

  cairo_set_source_surface (cr, priv->backing_store, 0, 0);
  cairo_paint (cr);

  gimp_ruler_draw_pos (ruler, cr);

  return FALSE;
}