/*static*/ void
gst_editor_link_realize (GooCanvasItem * citem)
{
GooCanvasLineDash * dash;
if ((citem == NULL) || (!GST_EDITOR_LINK (citem))) {
g_print (
"Warning: gst_editor_link_realize failed because citem %p is no "
"gst_editor_link",
citem);
return;
}
GstEditorLink * link = GST_EDITOR_LINK (citem);
link->points->coords[0] = 0.0;
link->points->coords[1] = 0.0;
link->points->coords[2] = 0.0;
link->points->coords[3] = 0.0;
/* we need to be realized before setting properties */
dash = goo_canvas_line_dash_new (2, 5.0, 5.0);
/* see goo-canvas-line.h for the docs */
g_object_set (G_OBJECT (citem), "points", link->points, "line-width", 2.0,
"line-dash", dash, "start-arrow", TRUE, NULL);
goo_canvas_line_dash_unref (dash);
// goo_canvas_item_raise_pos (citem, 10);
goo_canvas_item_raise (citem, NULL);
}
static void
create_events_area (GtkWidget *canvas,
gint area_num,
GooCanvasPointerEvents pointer_events,
gchar *label)
{
gint row = area_num / 3, col = area_num % 3;
gdouble x = col * 200, y = row * 150;
GooCanvasItem *root, *rect;
char *view_id;
GooCanvasLineDash *dash;
root = goo_canvas_get_root_item (GOO_CANVAS (canvas));
dash = goo_canvas_line_dash_new (2, 5.0, 5.0);
/* Create invisible item. */
rect = goo_canvas_rect_new (root, x + 45, y + 35, 30, 30,
"fill-color", "red",
"visibility", GOO_CANVAS_ITEM_INVISIBLE,
"line-width", 5.0,
"pointer-events", pointer_events,
NULL);
view_id = g_strdup_printf ("%s invisible", label);
g_object_set_data_full (G_OBJECT (rect), "id", view_id, g_free);
setup_item_signals (rect);
/* Display a thin rect around it to indicate it is there. */
#if 1
rect = goo_canvas_rect_new (root, x + 42.5, y + 32.5, 36, 36,
"line-dash", dash,
"line-width", 1.0,
"stroke-color", "gray",
NULL);
#endif
/* Create unpainted item. */
rect = goo_canvas_rect_new (root, x + 85, y + 35, 30, 30,
"stroke-pattern", NULL,
"line-width", 5.0,
"pointer-events", pointer_events,
NULL);
view_id = g_strdup_printf ("%s unpainted", label);
g_object_set_data_full (G_OBJECT (rect), "id", view_id, g_free);
setup_item_signals (rect);
/* Display a thin rect around it to indicate it is there. */
#if 1
rect = goo_canvas_rect_new (root, x + 82.5, y + 32.5, 36, 36,
"line-dash", dash,
"line-width", 1.0,
"stroke-color", "gray",
NULL);
#endif
/* Create stroked item. */
rect = goo_canvas_rect_new (root, x + 125, y + 35, 30, 30,
"line-width", 5.0,
"pointer-events", pointer_events,
NULL);
view_id = g_strdup_printf ("%s stroked", label);
g_object_set_data_full (G_OBJECT (rect), "id", view_id, g_free);
setup_item_signals (rect);
/* Create filled item. */
rect = goo_canvas_rect_new (root, x + 60, y + 75, 30, 30,
"fill-color", "red",
"stroke-pattern", NULL,
"line-width", 5.0,
"pointer-events", pointer_events,
NULL);
view_id = g_strdup_printf ("%s filled", label);
g_object_set_data_full (G_OBJECT (rect), "id", view_id, g_free);
setup_item_signals (rect);
/* Create stroked & filled item. */
rect = goo_canvas_rect_new (root, x + 100, y + 75, 30, 30,
"fill-color", "red",
"line-width", 5.0,
"pointer-events", pointer_events,
NULL);
view_id = g_strdup_printf ("%s stroked & filled", label);
g_object_set_data_full (G_OBJECT (rect), "id", view_id, g_free);
setup_item_signals (rect);
goo_canvas_text_new (root, label, x + 100, y + 130, -1, GOO_CANVAS_ANCHOR_CENTER,
"font", "Sans 12",
"fill-color", "blue",
NULL);
goo_canvas_line_dash_unref (dash);
}
gboolean
gst_editor_link_link (GstEditorLink * link)
{
GObject * src, *sink;
GstPad * srcpad = NULL, * sinkpad = NULL;
GooCanvasItem * item;
GooCanvasLineDash * dash;
g_return_val_if_fail (GST_IS_EDITOR_LINK (link), FALSE);
if (!link->srcpad || !link->sinkpad)
goto error;
src = (GObject *)GST_EDITOR_ITEM (link->srcpad)->object;
sink = (GObject *)GST_EDITOR_ITEM (link->sinkpad)->object;
if (!GST_EDITOR_PAD (link->srcpad)->istemplate) {
if (!GST_EDITOR_PAD (link->sinkpad)->istemplate) {
if (GST_PAD_PEER (src) || GST_PAD_PEER (sink)) {
/*if (GST_PAD_PEER (src) != (GstPad *) sink)
{
g_warning ("The src pad is linked, but not to the sink pad");
goto error;
}
if (GST_PAD_PEER (sink) != (GstPad *) src)
{
g_warning ("The sink pad is linked, but not to the src pad");
goto error;
} */
srcpad = GST_PAD (src);
sinkpad = GST_PAD (sink);
goto linked;
/* yay goto */
}
}
else if (GST_PAD_PEER (src)) {
/* the to pad is a template */
g_warning ("The src pad is linked, but not to the sink pad");
goto error;
}
}
else if (!GST_EDITOR_PAD (link->sinkpad)->istemplate && GST_PAD_PEER (sink)) {
/* from pad is a template */
g_warning ("The sink pad is linked, but not to the src pad");
goto error;
}
if (link->ghost) {
g_object_set (
G_OBJECT (GOO_CANVAS_ITEM (link)), "fill-color", "grey70", NULL);
goto linked;
}
else if (GST_IS_EDITOR_PAD_SOMETIMES (link->srcpad) ||
GST_IS_EDITOR_PAD_SOMETIMES (link->sinkpad)) {
make_dynamic_link (link);
g_object_set (
G_OBJECT (GOO_CANVAS_ITEM (link)), "fill-color", "grey50", NULL);
goto linked;
}
else {
if (!GST_EDITOR_PAD (link->srcpad)->istemplate) {
srcpad = GST_PAD (src);
}
else if (GST_IS_EDITOR_PAD_REQUEST (link->srcpad)) {
srcpad = gst_element_get_request_pad (
(GstElement *)GST_EDITOR_ITEM (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->srcpad)))
->object,
GST_PAD_TEMPLATE (src)->name_template);
/* the new_pad signal will cause a new pad to made automagically in the
element */
g_object_set (G_OBJECT (GOO_CANVAS_ITEM (link)), "src-pad",
gst_editor_item_get ((GstObject *)srcpad), NULL);
}
else {
goto error;
}
if (!srcpad)
goto error;
if (!GST_EDITOR_PAD (link->sinkpad)->istemplate) {
sinkpad = GST_PAD (sink);
} else if (GST_IS_EDITOR_PAD_REQUEST (link->sinkpad)) {
sinkpad = gst_element_get_request_pad (
(GstElement *)GST_EDITOR_ITEM (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->sinkpad)))
->object,
GST_PAD_TEMPLATE (sink)->name_template);
g_object_set (G_OBJECT (GOO_CANVAS_ITEM (link)), "sink-pad",
gst_editor_item_get ((GstObject *)sinkpad), NULL);
} else {
goto error;
}
if (!sinkpad)
goto error;
if (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_OK) {
GstEditorBin * srcbin, *sinkbin;
g_object_set (
G_OBJECT (GOO_CANVAS_ITEM (link)), "fill-color", "black", NULL);
linked:
srcbin = sinkbin = NULL;
dash = goo_canvas_line_dash_new (0, NULL);
g_object_set (G_OBJECT (GOO_CANVAS_ITEM (link)), "line-dash", dash, NULL);
goo_canvas_line_dash_unref (dash);
g_signal_connect (link->srcpad, "position-changed",
G_CALLBACK (on_editor_pad_position_changed), G_OBJECT (link));
g_signal_connect (link->sinkpad, "position-changed",
G_CALLBACK (on_editor_pad_position_changed), G_OBJECT (link));
/* don't connect a signal on a ghost or dynamic link */
g_print (
"adding unlinked signal for src: %p and sink %p", srcpad, sinkpad);
if (srcpad && sinkpad) {
GST_CAT_DEBUG (gste_debug_cat,
"link pad signal (%s:%s from %s:%s) with link %p",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad), link);
g_signal_connect (srcpad, "unlinked", G_CALLBACK (on_pad_unlink), link);
g_signal_connect (
sinkpad, "unlinked", G_CALLBACK (on_pad_unlink), link);
}
item = goo_canvas_item_get_parent (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->srcpad)));
if (GST_IS_EDITOR_BIN (item))
srcbin = GST_EDITOR_BIN (item);
item = goo_canvas_item_get_parent (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->sinkpad)));
if (GST_IS_EDITOR_BIN (item))
sinkbin = GST_EDITOR_BIN (item);
if (sinkbin)
sinkbin->links = g_list_prepend (sinkbin->links, link);
if (srcbin && sinkbin != srcbin)
srcbin->links = g_list_prepend (srcbin->links, link);
return TRUE;
}
}
error:
g_message ("could not link");
if (link->srcpad)
GST_EDITOR_PAD (link->srcpad)->link = NULL;
if (link->sinkpad)
GST_EDITOR_PAD (link->sinkpad)->link = NULL;
return FALSE;
}
