// Retrieves the bounding box. We use a caching scheme for this
// since it's too expensive to calculate it every time we need it.
inline static void get_boundingbox (WireItem *item, Coords *p1, Coords *p2)
{
g_return_if_fail (item != NULL);
g_return_if_fail (IS_WIRE_ITEM (item));
WireItemPriv *priv;
priv = item->priv;
if (!priv->cache_valid) {
Coords start_pos, end_pos;
GooCanvasBounds bounds; //, canvas_bounds;
goo_canvas_item_get_bounds (GOO_CANVAS_ITEM (item), &bounds);
priv->bbox_start.x = bounds.x1;
priv->bbox_start.y = bounds.y1;
priv->bbox_end.x = bounds.x2;
priv->bbox_end.y = bounds.y2;
priv->cache_valid = TRUE;
}
if (p1)
*p1 = priv->bbox_start;
if (p2)
*p2 = priv->bbox_end;
}
static void wire_rotated_callback (ItemData *data, int angle, SheetItem *sheet_item)
{
WireItem *wire_item;
GooCanvasPoints *points;
Coords start_pos, length;
g_return_if_fail (sheet_item != NULL);
g_return_if_fail (IS_WIRE_ITEM (sheet_item));
wire_item = WIRE_ITEM (sheet_item);
wire_get_pos_and_length (WIRE (data), &start_pos, &length);
points = goo_canvas_points_new (2);
points->coords[0] = 0;
points->coords[1] = 0;
points->coords[2] = length.x;
points->coords[3] = length.y;
g_object_set (wire_item->priv->line, "points", points, NULL);
goo_canvas_points_unref (points);
g_object_set (wire_item, "x", start_pos.x, "y", start_pos.y, NULL);
g_object_set (wire_item->priv->resize2, "x", length.x - RESIZER_SIZE, "y",
length.y - RESIZER_SIZE, NULL);
// Invalidate the bounding box cache.
wire_item->priv->cache_valid = FALSE;
}
static void wire_flipped_callback (ItemData *data, IDFlip direction, SheetItem *sheet_item)
{
GooCanvasPoints *points;
WireItem *item;
WireItemPriv *priv;
Coords start_pos, length;
g_return_if_fail (sheet_item != NULL);
g_return_if_fail (IS_WIRE_ITEM (sheet_item));
item = WIRE_ITEM (sheet_item);
priv = item->priv;
wire_get_pos_and_length (WIRE (data), &start_pos, &length);
points = goo_canvas_points_new (2);
points->coords[0] = 0;
points->coords[1] = 0;
points->coords[2] = length.x;
points->coords[3] = length.y;
g_object_set (item->priv->line, "points", points, NULL);
goo_canvas_points_unref (points);
g_object_set (item, "x", start_pos.x, "y", start_pos.y, NULL);
// Invalidate the bounding box cache.
priv->cache_valid = FALSE;
}
static void
wire_item_destroy (GtkObject *object)
{
WireItem *wire;
WireItemPriv *priv;
g_return_if_fail (object != NULL);
g_return_if_fail (IS_WIRE_ITEM (object));
wire = WIRE_ITEM (object);
priv = wire->priv;
if (priv) {
if (priv->line) {
/* TODO Check if destroy or unref have to be used for
* GnomeCanvasItem */
gtk_object_destroy (GTK_OBJECT (priv->line));
priv->line = NULL;
}
g_free (priv);
wire->priv = NULL;
}
if (GTK_OBJECT_CLASS(wire_item_parent_class)->destroy){
GTK_OBJECT_CLASS(wire_item_parent_class)->destroy(object);
}
}
// This function returns the position of the canvas item. It has
// nothing to do with where the wire is stored in the sheet node store.
void wire_item_get_start_pos (WireItem *item, Coords *pos)
{
g_return_if_fail (item != NULL);
g_return_if_fail (IS_WIRE_ITEM (item));
g_return_if_fail (pos != NULL);
g_object_get (G_OBJECT (item), "x", &pos->x, "y", &pos->y, NULL);
}
static void
wire_changed_callback (Wire *wire, WireItem *item)
{
Coords start_pos, length;
GooCanvasPoints *points;
g_return_if_fail (wire != NULL);
g_return_if_fail (IS_ITEM_DATA (wire));
g_return_if_fail (item != NULL);
g_return_if_fail (IS_WIRE_ITEM (item));
wire_get_pos_and_length (wire, &start_pos, &length);
Sheet *sheet = SHEET (goo_canvas_item_get_canvas (GOO_CANVAS_ITEM (item)));
if (G_UNLIKELY(!sheet)) {
g_warning ("Failed to determine the Sheet the item is glued to. This should never happen. Ever!");
} else {
item_data_snap (ITEM_DATA (wire), sheet->grid);
}
// Move the canvas item and invalidate the bbox cache.
goo_canvas_item_set_simple_transform (GOO_CANVAS_ITEM (item),
start_pos.x,
start_pos.y,
1.0,
0.0);
item->priv->cache_valid = FALSE;
points = goo_canvas_points_new (2);
points->coords[0] = 0;
points->coords[1] = 0;
points->coords[2] = length.x;
points->coords[3] = length.y;
// this does handle cleanup of previous points internally
g_object_set (item->priv->line,
"points", points,
NULL);
goo_canvas_points_unref (points);
g_object_set (item->priv->resize1,
"x", -RESIZER_SIZE,
"y", -RESIZER_SIZE,
"width", 2 * RESIZER_SIZE,
"height", 2 * RESIZER_SIZE,
NULL);
g_object_set (item->priv->resize2,
"x", length.x-RESIZER_SIZE,
"y", length.y-RESIZER_SIZE,
"width", 2 * RESIZER_SIZE,
"height", 2 * RESIZER_SIZE,
NULL);
goo_canvas_item_request_update (GOO_CANVAS_ITEM (item->priv->line));
}
static void wire_item_set_property (GObject *object, guint property_id, const GValue *value,
GParamSpec *pspec)
{
g_return_if_fail (object != NULL);
g_return_if_fail (IS_WIRE_ITEM (object));
switch (property_id) {
default:
g_warning ("PartItem: Invalid argument.\n");
}
}
static void wire_item_get_property (GObject *object, guint property_id, GValue *value,
GParamSpec *pspec)
{
g_return_if_fail (object != NULL);
g_return_if_fail (IS_WIRE_ITEM (object));
switch (property_id) {
default:
pspec->value_type = G_TYPE_INVALID;
break;
}
}
static void
wire_rotated_callback (ItemData *data, int angle, SheetItem *sheet_item)
{
WireItem *wire_item;
GnomeCanvasPoints *points;
SheetPos start_pos, length;
g_return_if_fail (sheet_item != NULL);
g_return_if_fail (IS_WIRE_ITEM (sheet_item));
wire_item = WIRE_ITEM (sheet_item);
wire_get_pos_and_length (WIRE (data), &start_pos, &length);
points = gnome_canvas_points_new (2);
points->coords[0] = 0;
points->coords[1] = 0;
points->coords[2] = length.x;
points->coords[3] = length.y;
gnome_canvas_item_set (GNOME_CANVAS_ITEM (wire_item->priv->line),
"points", points,
NULL);
gnome_canvas_points_unref (points);
gnome_canvas_item_set (GNOME_CANVAS_ITEM (wire_item),
"x", start_pos.x,
"y", start_pos.y,
NULL);
gnome_canvas_item_set (
GNOME_CANVAS_ITEM (wire_item-> priv->resize2),
"x1", length.x-RESIZER_SIZE,
"y1", length.y-RESIZER_SIZE,
"x2", length.x+RESIZER_SIZE,
"y2", length.y+RESIZER_SIZE,
NULL
);
/*
* Invalidate the bounding box cache.
*/
wire_item->priv->cache_valid = FALSE;
}
// This function returns the length of the canvas item.
void wire_item_get_length (WireItem *item, Coords *pos)
{
WireItemPriv *priv;
GooCanvasPoints *points;
g_return_if_fail (item != NULL);
g_return_if_fail (IS_WIRE_ITEM (item));
g_return_if_fail (pos != NULL);
priv = item->priv;
g_object_get (G_OBJECT (priv->line), "points", &points, NULL);
// This is not strictly neccessary, since the first point is always
// (0,0) but it's more correct and good to have if this changes in the
// future.
pos->x = points->coords[2] - points->coords[0];
pos->y = points->coords[3] - points->coords[1];
goo_canvas_points_unref (points);
}
/**
* This is called when the wire data was moved. Update the view accordingly.
*/
static void
wire_moved_callback (ItemData *data, SheetPos *pos, SheetItem *item)
{
WireItem *wire_item;
g_return_if_fail (data != NULL);
g_return_if_fail (IS_ITEM_DATA (data));
g_return_if_fail (item != NULL);
g_return_if_fail (IS_WIRE_ITEM (item));
if (pos == NULL)
return;
wire_item = WIRE_ITEM (item);
/*
* Move the canvas item and invalidate the bbox cache.
*/
gnome_canvas_item_move (GNOME_CANVAS_ITEM (item), pos->x, pos->y);
wire_item->priv->cache_valid = FALSE;
}
static void
wire_flipped_callback (ItemData *data,
gboolean horizontal, SheetItem *sheet_item)
{
GnomeCanvasPoints *points;
WireItem *item;
WireItemPriv *priv;
SheetPos start_pos, length;
g_return_if_fail (sheet_item != NULL);
g_return_if_fail (IS_WIRE_ITEM (sheet_item));
item = WIRE_ITEM (sheet_item);
priv = item->priv;
wire_get_pos_and_length (WIRE (data), &start_pos, &length);
points = gnome_canvas_points_new (2);
points->coords[0] = 0;
points->coords[1] = 0;
points->coords[2] = length.x;
points->coords[3] = length.y;
gnome_canvas_item_set (GNOME_CANVAS_ITEM (item->priv->line),
"points", points,
NULL);
gnome_canvas_points_unref (points);
gnome_canvas_item_set (GNOME_CANVAS_ITEM (item),
"x", start_pos.x,
"y", start_pos.y,
NULL);
/*
* Invalidate the bounding box cache.
*/
priv->cache_valid = FALSE;
}
// This is called when the wire data was moved. Update the view accordingly.
static void
wire_moved_callback (ItemData *data, SheetPos *pos, SheetItem *item)
{
WireItem *wire_item;
g_return_if_fail (data != NULL);
g_return_if_fail (IS_ITEM_DATA (data));
g_return_if_fail (item != NULL);
g_return_if_fail (IS_WIRE_ITEM (item));
if (pos == NULL)
return;
wire_item = WIRE_ITEM (item);
// Move the canvas item and invalidate the bbox cache.
goo_canvas_item_set_simple_transform (GOO_CANVAS_ITEM (item),
pos->x,
pos->y,
1.0,
0.0);
wire_item->priv->cache_valid = FALSE;
}
