gint64
rg_table_get_end_time (RgTable *self)
{
RgTableIter iter;
g_return_val_if_fail (RG_IS_TABLE (self), 0);
if (rg_table_get_iter_last (self, &iter))
return rg_table_iter_get_timestamp (&iter);
return g_get_monotonic_time ();
}
static void
rg_graph_ensure_surface (RgGraph *self)
{
RgGraphPrivate *priv = rg_graph_get_instance_private (self);
GtkAllocation alloc;
RgTableIter iter;
gint64 begin_time;
gint64 end_time;
gdouble y_begin;
gdouble y_end;
cairo_t *cr;
gsize i;
g_assert (RG_IS_GRAPH (self));
gtk_widget_get_allocation (GTK_WIDGET (self), &alloc);
if (priv->surface == NULL)
{
priv->surface_dirty = TRUE;
priv->surface = gdk_window_create_similar_surface (gtk_widget_get_window (GTK_WIDGET (self)),
CAIRO_CONTENT_COLOR_ALPHA,
alloc.width,
alloc.height);
}
if (priv->table == NULL)
return;
if (priv->surface_dirty)
{
priv->surface_dirty = FALSE;
cr = cairo_create (priv->surface);
cairo_save (cr);
cairo_rectangle (cr, 0, 0, alloc.width, alloc.height);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_fill (cr);
cairo_restore (cr);
g_object_get (priv->table,
"value-min", &y_begin,
"value-max", &y_end,
NULL);
rg_table_get_iter_last (priv->table, &iter);
end_time = rg_table_iter_get_timestamp (&iter);
begin_time = end_time - rg_table_get_timespan (priv->table);
for (i = 0; i < priv->renderers->len; i++)
{
RgRenderer *renderer;
renderer = g_ptr_array_index (priv->renderers, i);
cairo_save (cr);
rg_renderer_render (renderer, priv->table, begin_time, end_time, y_begin, y_end, cr, &alloc);
cairo_restore (cr);
}
cairo_destroy (cr);
priv->x_offset = 0;
}
if (priv->tick_handler == 0)
priv->tick_handler = gtk_widget_add_tick_callback (GTK_WIDGET (self),
rg_graph_tick_cb,
self,
NULL);
}
