static void
foo_canvas_widget_update (FooCanvasItem *item, double i2w_dx, double i2w_dy, int flags)
{
FooCanvasWidget *witem;
witem = FOO_CANVAS_WIDGET (item);
if (parent_class->update)
(* parent_class->update) (item, i2w_dx, i2w_dy, flags);
if (witem->widget) {
GtkRequisition req;
if (witem->size_pixels) {
witem->cwidth = (int) (witem->width + 0.5);
witem->cheight = (int) (witem->height + 0.5);
} else {
witem->cwidth = (int) (witem->width * item->canvas->pixels_per_unit + 0.5);
witem->cheight = (int) (witem->height * item->canvas->pixels_per_unit + 0.5);
}
req.width = witem->cwidth;
req.height = witem->cheight;
gtk_widget_size_request (witem->widget, &req);
} else {
witem->cwidth = 0.0;
witem->cheight = 0.0;
}
recalc_bounds (witem);
}
bool object_selection_t::remove_object_index(size_t obj_ind)
{
// not 100% sure if it erases the object at this position, or with this key
// I think it's with the key
auto n = object_indices.erase(obj_ind);
recalc_bounds();
return n > 0;
}
bool object_selection_t::add_object_index(size_t obj_ind)
{
auto x = object_indices.insert(obj_ind);
recalc_bounds();
//second value of pair returned by insert is a bool that is true
//if the insertion took place
return x.second;
}
void object_selection_t::clear_selection()
{
object_indices.clear();
recalc_bounds();
}
static void
foo_canvas_widget_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
FooCanvasItem *item;
FooCanvasWidget *witem;
GObject *obj;
int update;
int calc_bounds;
g_return_if_fail (object != NULL);
g_return_if_fail (FOO_IS_CANVAS_WIDGET (object));
item = FOO_CANVAS_ITEM (object);
witem = FOO_CANVAS_WIDGET (object);
update = FALSE;
calc_bounds = FALSE;
switch (param_id) {
case PROP_WIDGET:
if (witem->widget) {
g_signal_handler_disconnect (G_OBJECT (witem->widget), witem->destroy_id);
gtk_container_remove (GTK_CONTAINER (item->canvas), witem->widget);
}
obj = g_value_get_object (value);
if (obj) {
witem->widget = GTK_WIDGET (obj);
witem->destroy_id = g_signal_connect (G_OBJECT (obj),
"destroy", G_CALLBACK (do_destroy), witem);
gtk_layout_put (GTK_LAYOUT (item->canvas), witem->widget,
witem->cx + item->canvas->zoom_xofs,
witem->cy + item->canvas->zoom_yofs);
}
update = TRUE;
break;
case PROP_X:
if (witem->x != g_value_get_double (value))
{
witem->x = g_value_get_double (value);
calc_bounds = TRUE;
}
break;
case PROP_Y:
if (witem->y != g_value_get_double (value))
{
witem->y = g_value_get_double (value);
calc_bounds = TRUE;
}
break;
case PROP_WIDTH:
if (witem->width != fabs (g_value_get_double (value)))
{
witem->width = fabs (g_value_get_double (value));
update = TRUE;
}
break;
case PROP_HEIGHT:
if (witem->height != fabs (g_value_get_double (value)))
{
witem->height = fabs (g_value_get_double (value));
update = TRUE;
}
break;
case PROP_ANCHOR:
if (witem->anchor != (GtkAnchorType)g_value_get_enum (value))
{
witem->anchor = g_value_get_enum (value);
update = TRUE;
}
break;
case PROP_SIZE_PIXELS:
if (witem->size_pixels != g_value_get_boolean (value))
{
witem->size_pixels = g_value_get_boolean (value);
update = TRUE;
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
if (update)
(* FOO_CANVAS_ITEM_GET_CLASS (item)->update) (item, 0, 0, 0);
if (calc_bounds)
recalc_bounds (witem);
}
