static gboolean
ppg_gtk_instrument_get_sample_range (PpgModel *model,
PpgModelIter *iter,
gint key,
GValue *value,
gpointer user_data)
{
PpgSession *session = ppg_instrument_get_session(user_data);
gboolean ret;
if (!session) {
CRITICAL(GtkInstrument, "Asking for cooked sample with no session");
return FALSE;
}
ret = ppg_model_get_value(model, iter,
(key == COLUMN_BEGIN) ? COLUMN_REAL_BEGIN
: COLUMN_REAL_END,
value);
if (ret) {
g_value_set_double(value,
ppg_session_convert_time(session,
g_value_get_double(value)));
}
return ret;
}
static void
ppg_line_visualizer_draw (PpgVisualizer *visualizer)
{
PpgLineVisualizerPrivate *priv;
PpgModelIter iter;
Line *line;
PpgColorIter color;
cairo_t *cr;
GValue value = { 0 };
gfloat height;
gfloat width;
gdouble x;
gdouble y;
gdouble begin;
gdouble end;
gdouble lower;
gdouble upper;
gdouble val = 0;
gint i;
g_return_if_fail(PPG_IS_LINE_VISUALIZER(visualizer));
priv = PPG_LINE_VISUALIZER(visualizer)->priv;
clutter_cairo_texture_clear(CLUTTER_CAIRO_TEXTURE(priv->actor));
cr = clutter_cairo_texture_create(CLUTTER_CAIRO_TEXTURE(priv->actor));
g_object_get(visualizer,
"begin", &begin,
"end", &end,
NULL);
g_object_get(priv->actor,
"width", &width,
"height", &height,
NULL);
/* FIXME: */
lower = 0;
upper = 200;
ppg_color_iter_init(&color);
cairo_set_line_width(cr, 1.0);
for (i = 0; i < priv->lines->len; i++) {
line = &g_array_index(priv->lines, Line, i);
cairo_move_to(cr, 0, height);
gdk_cairo_set_source_color(cr, &color.color);
if (!ppg_model_get_iter_first(line->model, &iter)) {
goto next;
}
do {
ppg_model_get_value(line->model, &iter, line->key, &value);
if (G_VALUE_HOLDS(&value, G_TYPE_DOUBLE)) {
val = g_value_get_double(&value);
} else if (G_VALUE_HOLDS(&value, G_TYPE_INT)) {
val = g_value_get_int(&value);
} else if (G_VALUE_HOLDS(&value, G_TYPE_UINT)) {
val = g_value_get_uint(&value);
} else {
g_critical("HOLDS %s", g_type_name(value.g_type));
g_assert_not_reached();
}
x = get_x_offset(begin, end, width, iter.time);
y = get_y_offset(lower, upper, height, val);
cairo_line_to(cr, x, y);
g_value_unset(&value);
} while (ppg_model_iter_next(line->model, &iter));
cairo_stroke(cr);
next:
ppg_color_iter_next(&color);
}
cairo_destroy(cr);
}
