/*!
* \brief Upgrade the Line to a Polyline
*
* Convert the _Line to a _Polyline with the position clicked as third point.
* Further object properties are preserved by the use of object_substitute()
*
* @param obj self pointer
* @param clicked last clicked point on canvas or NULL
* @param data here unuesed user_data pointer
* @return an _ObjectChange to support undo/redo
*
* \memberof Line
*/
static ObjectChange *
_convert_to_polyline_callback (DiaObject *obj, Point *clicked, gpointer data)
{
DiaObject *poly;
Line *line = (Line *)obj;
Point points[3];
points[0] = line->connection.endpoints[0];
points[2] = line->connection.endpoints[1];
if (clicked) {
points[1] = *clicked;
} else {
points[1].x = (points[0].x + points[2].x) / 2;
points[1].y = (points[0].y + points[2].y) / 2;
}
poly = create_standard_polyline (3, points, &line->end_arrow, &line->start_arrow);
g_return_val_if_fail (poly != NULL, NULL);
return object_substitute (obj, poly);
}
static DiaObject *
fig_read_polyline(FILE *file, DiaContext *ctx)
{
int sub_type;
int line_style;
int thickness;
int pen_color;
int fill_color;
int depth;
int pen_style;
int area_fill;
real style_val;
int join_style;
int cap_style;
int radius;
int forward_arrow, backward_arrow;
Arrow *forward_arrow_info = NULL, *backward_arrow_info = NULL;
int npoints;
Point *points;
GPtrArray *props = g_ptr_array_new();
DiaObject *newobj = NULL;
int flipped = 0;
char *image_file = NULL;
char* old_locale;
old_locale = setlocale(LC_NUMERIC, "C");
if (fscanf(file, "%d %d %d %d %d %d %d %d %lf %d %d %d %d %d %d\n",
&sub_type,
&line_style,
&thickness,
&pen_color,
&fill_color,
&depth,
&pen_style,
&area_fill,
&style_val,
&join_style,
&cap_style,
&radius,
&forward_arrow,
&backward_arrow,
&npoints) != 15) {
dia_context_add_message_with_errno(ctx, errno, _("Couldn't read polyline info.\n"));
goto exit;
}
if (forward_arrow == 1) {
forward_arrow_info = fig_read_arrow(file, ctx);
}
if (backward_arrow == 1) {
backward_arrow_info = fig_read_arrow(file, ctx);
}
if (sub_type == 5) { /* image has image name before npoints */
/* Despite what the specs say */
if (fscanf(file, " %d", &flipped) != 1) {
dia_context_add_message_with_errno(ctx, errno, _("Couldn't read flipped bit."));
goto exit;
}
image_file = fig_read_text_line(file);
}
if (!fig_read_n_points(file, npoints, &points, ctx)) {
goto exit;
}
switch (sub_type) {
case 4: {
RealProperty *rprop =
(RealProperty *)make_new_prop("corner_radius",
PROP_TYPE_REAL,PROP_FLAG_DONT_SAVE);
if (radius < 0) {
dia_context_add_message(ctx, _("Negative corner radius; negating"));
rprop->real_data = -radius/FIG_ALT_UNIT;
} else {
rprop->real_data = radius/FIG_ALT_UNIT;
}
g_ptr_array_add(props,rprop);
}
/* Notice fallthrough */
case 2: /* box */
if (points[0].x > points[2].x) {
real tmp = points[0].x;
points[0].x = points[2].x;
points[2].x = tmp;
}
if (points[0].y > points[2].y) {
real tmp = points[0].y;
points[0].y = points[2].y;
points[2].y = tmp;
}
newobj = create_standard_box(points[0].x, points[0].y,
points[2].x-points[0].x,
points[2].y-points[0].y);
if (newobj == NULL) goto exit;
newobj->ops->set_props(newobj, props);
break;
case 5: /* imported-picture bounding-box) */
newobj = create_standard_image(points[0].x, points[0].y,
points[2].x-points[0].x,
points[2].y-points[0].y,
image_file);
if (newobj == NULL) goto exit;
break;
case 1: /* polyline */
newobj = create_standard_polyline(npoints, points,
forward_arrow_info,
backward_arrow_info);
if (newobj == NULL) goto exit;
break;
case 3: /* polygon */
newobj = create_standard_polygon(npoints, points);
if (newobj == NULL) goto exit;
break;
default:
dia_context_add_message(ctx, _("Unknown polyline subtype: %d\n"), sub_type);
goto exit;
}
fig_simple_properties(newobj, line_style, style_val, thickness,
pen_color, fill_color, area_fill, ctx);
/* Pen style field (not used) */
/* Style_val (size of dots and dashes) in 1/80 inch*/
/* Join style */
/* Cap style */
/* Depth field */
add_at_depth(newobj, depth, ctx);
exit:
setlocale(LC_NUMERIC, old_locale);
prop_list_free(props);
g_free(forward_arrow_info);
g_free(backward_arrow_info);
g_free(image_file);
return newobj;
}
