Re: is_item_at

[Damon Chaplin <damonachaplin gmail com>]

On 23 May 2011 14:28, control H <control h gmail com> wrote:

> I'm not using large coordinates. The x&y coordinates look very reasonable.
> The only place where I'm using a transformation matrix (I think) is in
> the constructor:
>
> goo_line_item_new (GooCanvasItem      *parent,
>                   double x, double y,
>                   gdouble dx,
>                   gdouble dy,
>                   ...)
> {
>  GooCanvasItem *item;
>  GooLineItem *line_item;
>  const char *first_property;
>  va_list var_args;
>
>  item = g_object_new (GOO_TYPE_LINE_ITEM, NULL);
>
>  line_item = (GooLineItem*) item;
>  line_item->dx = dx;
>  line_item->dy = dy;
>
>  goo_canvas_item_translate(item,x,y);
>
>  va_start (var_args, dy);
>  first_property = va_arg (var_args, char*);
>  if (first_property)
>    g_object_set_valist ((GObject*) item, first_property, var_args);
>  va_end (var_args);
>
>  if (parent)
>    {
>      goo_canvas_item_add_child (parent, item, -1);
>      g_object_unref (item);
>    }
>
>  g_object_set(item,"can-focus", TRUE,NULL);
>
>  return item;
> }
>
> Example line showing problems:
>
> goo_line_item_new (root, 50,50,140, 30,
>                             "stroke-color", "blue",
>                             "line-width", 3.0,
>                             NULL);
>
> In addition it seems that the line-width + 4.0 in the is_item_at()
> code doesn't seem to have any influence.

I can't understand the problem either.

If you can produce a simple test app I'll have a look at it.

Damon