gstreamer/editor/gsteditorconnection.c

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#include <gnome.h>
#include <gst/gst.h>
#include <gst/gstutils.h>
#include "gsteditor.h"
/* class functions */
static void gst_editor_connection_class_init (GstEditorConnectionClass *klass);
static void gst_editor_connection_init (GstEditorConnection *connection);
static void gst_editor_connection_set_arg (GtkObject *object,GtkArg *arg,guint id);
static void gst_editor_connection_get_arg (GtkObject *object,GtkArg *arg,guint id);
static void gst_editor_connection_destroy (GtkObject *object);
static void gst_editor_connection_realize (GstEditorConnection *connection);
/* events fired by items within self */
/* static gint gst_editor_connection_line_event(GnomeCanvasItem *item, */
/* GdkEvent *event, */
/* GstEditorConnection *connection); */
/* utility functions */
enum {
ARG_0,
ARG_X,
ARG_Y,
ARG_FROMPAD,
ARG_TOPAD,
ARG_GHOST,
};
enum {
LAST_SIGNAL
};
static GtkObjectClass *parent_class;
/* static guint gst_editor_connection_signals[LAST_SIGNAL] = { 0 }; */
GtkType
gst_editor_connection_get_type (void)
{
static GtkType connection_type = 0;
if (!connection_type) {
static const GtkTypeInfo connection_info = {
"GstEditorConnection",
sizeof(GstEditorConnection),
sizeof(GstEditorConnectionClass),
(GtkClassInitFunc)gst_editor_connection_class_init,
(GtkObjectInitFunc)gst_editor_connection_init,
NULL,
NULL,
(GtkClassInitFunc)NULL,
};
connection_type = gtk_type_unique (gtk_object_get_type (), &connection_info);
}
return connection_type;
}
static void
gst_editor_connection_class_init (GstEditorConnectionClass *klass)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass*)klass;
parent_class = gtk_type_class(gnome_canvas_line_get_type());
gtk_object_add_arg_type("GstEditorConnection::x",GTK_TYPE_DOUBLE,
GTK_ARG_READWRITE,ARG_X);
gtk_object_add_arg_type("GstEditorConnection::y",GTK_TYPE_DOUBLE,
GTK_ARG_READWRITE,ARG_Y);
gtk_object_add_arg_type("GstEditorConnection::frompad",GTK_TYPE_POINTER,
GTK_ARG_READWRITE,ARG_FROMPAD);
gtk_object_add_arg_type("GstEditorConnection::topad",GTK_TYPE_POINTER,
GTK_ARG_READWRITE,ARG_TOPAD);
gtk_object_add_arg_type("GstEditorConnection::ghost",GTK_TYPE_BOOL,
GTK_ARG_READWRITE,ARG_GHOST);
klass->realize = gst_editor_connection_realize;
object_class->set_arg = gst_editor_connection_set_arg;
object_class->get_arg = gst_editor_connection_get_arg;
object_class->destroy = gst_editor_connection_destroy;
}
static void
gst_editor_connection_init (GstEditorConnection *connection)
{
connection->points = gnome_canvas_points_new(2);
}
GstEditorConnection*
gst_editor_connection_new (GstEditorElement *parent,
GstEditorPad *frompad)
{
GstEditorConnection *connection;
g_return_val_if_fail(parent != NULL, NULL);
g_return_val_if_fail(GST_IS_EDITOR_ELEMENT(parent), NULL);
g_return_val_if_fail(frompad != NULL, NULL);
g_return_val_if_fail(GST_IS_EDITOR_PAD(frompad), NULL);
connection = GST_EDITOR_CONNECTION(gtk_type_new(GST_TYPE_EDITOR_CONNECTION));
connection->frompad = frompad;
connection->frompad->connection = connection;
connection->fromsrc = connection->frompad->issrc;
connection->parent = parent;
gst_editor_connection_realize(connection);
return connection;
}
static void
gst_editor_connection_set_arg (GtkObject *object,GtkArg *arg,guint id)
{
GstEditorConnection *connection;
/* get the major types of this object */
connection = GST_EDITOR_CONNECTION(object);
switch (id) {
case ARG_X:
connection->x = GTK_VALUE_DOUBLE(*arg);
connection->resize = TRUE;
break;
case ARG_Y:
connection->y = GTK_VALUE_DOUBLE(*arg);
connection->resize = TRUE;
break;
case ARG_TOPAD:
if (connection->topad) {
if (connection->ghost)
connection->topad->ghostconnection = NULL;
else
connection->topad->connection = NULL;
}
connection->topad = GTK_VALUE_POINTER(*arg);
/* if this is the same type, refuse */
if (connection->topad &&
(connection->frompad->issrc == connection->topad->issrc))
connection->topad = NULL;
if (connection->topad) {
if (connection->ghost)
connection->topad->ghostconnection = connection;
else
connection->topad->connection = connection;
}
connection->resize = TRUE;
break;
case ARG_GHOST:
connection->ghost = GTK_VALUE_BOOL(*arg);
break;
default:
g_warning("gsteditorconnection: unknown arg!");
break;
}
gst_editor_connection_resize(connection);
}
static void
gst_editor_connection_get_arg (GtkObject *object,GtkArg *arg,guint id)
{
GstEditorConnection *connection;
/* get the major types of this object */
connection = GST_EDITOR_CONNECTION(object);
switch (id) {
case ARG_X:
GTK_VALUE_INT(*arg) = connection->x;
break;
case ARG_Y:
GTK_VALUE_INT(*arg) = connection->y;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
gst_editor_connection_realize (GstEditorConnection *connection)
{
connection->points->coords[0] = 0.0;
connection->points->coords[1] = 0.0;
connection->points->coords[2] = 0.0;
connection->points->coords[3] = 0.0;
connection->line = gnome_canvas_item_new(
GST_EDITOR_ELEMENT(connection->parent)->group,
gnome_canvas_line_get_type(),
"points",connection->points,"width_units",2.0, NULL);
}
static void
gst_editor_connection_destroy (GtkObject *object)
{
GstEditorConnection *connection = GST_EDITOR_CONNECTION(object);
gtk_object_destroy(GTK_OBJECT(connection->line));
}
void
gst_editor_connection_resize (GstEditorConnection *connection)
{
gdouble x1,y1,x2,y2;
if (connection->resize != TRUE) return;
connection->resize = FALSE;
/* g_print("resizing connection, frompad is %p, topad is %p\n", */
/* connection->frompad,connection->topad); */
/* calculate the new endpoints */
if (connection->topad == NULL) {
/* our base point is the source pad */
if (connection->fromsrc)
x1 = connection->frompad->x + connection->frompad->width;
else
x1 = connection->frompad->x;
y1 = connection->frompad->y + (connection->frompad->height / 2);
x2 = connection->x;
y2 = connection->y;
/* NOTE: coords are in the following state:
x1,y1: item coords relative to the element's group
x2,y2: item coords relative to the bin's group
This means translating the x1,y1 coords into world, then into bin.
*/
gnome_canvas_item_i2w(GNOME_CANVAS_ITEM(connection->frompad->parent->group),&x1,&y1);
gnome_canvas_item_w2i(GNOME_CANVAS_ITEM(GST_EDITOR_ELEMENT_GROUP(connection->parent)),
&x1,&y1);
} else {
if (connection->fromsrc) {
x1 = connection->frompad->x + connection->frompad->width;
x2 = connection->topad->x;
} else {
x1 = connection->frompad->x;
x2 = connection->topad->x + connection->topad->width;
}
y1 = connection->frompad->y + (connection->frompad->height / 2);
y2 = connection->topad->y + (connection->topad->height / 2);
gnome_canvas_item_i2w(GNOME_CANVAS_ITEM(connection->frompad->parent->group),&x1,&y1);
gnome_canvas_item_w2i(GNOME_CANVAS_ITEM(GST_EDITOR_ELEMENT_GROUP(connection->parent)),
&x1,&y1);
gnome_canvas_item_i2w(GNOME_CANVAS_ITEM(connection->topad->parent->group),&x2,&y2);
gnome_canvas_item_w2i(GNOME_CANVAS_ITEM(GST_EDITOR_ELEMENT_GROUP(connection->parent)),
&x2,&y2);
}
connection->points->coords[0] = x1;
connection->points->coords[1] = y1;
connection->points->coords[2] = x2;
connection->points->coords[3] = y2;
gnome_canvas_item_set(connection->line,
"points",connection->points,NULL);
}
void
gst_editor_connection_set_endpoint (GstEditorConnection *connection,
gdouble x,gdouble y)
{
connection->x = x;
connection->y = y;
if (connection->topad) {
if (connection->ghost)
connection->topad->ghostconnection = NULL;
else
connection->topad->connection = NULL;
connection->topad = NULL;
}
connection->resize = TRUE;
gst_editor_connection_resize(connection);
}
void
gst_editor_connection_set_endpad (GstEditorConnection *connection,
GstEditorPad *pad)
{
/* first check for the trivial case */
if (connection->topad == pad) return;
/* now clean up if we've changed pads */
if (connection->topad) {
if (connection->ghost)
connection->topad->ghostconnection = NULL;
else
connection->topad->connection = NULL;
}
connection->topad = pad;
if (connection->ghost)
connection->topad->ghostconnection = connection;
else
connection->topad->connection = connection;
connection->resize = TRUE;
gst_editor_connection_resize(connection);
}
void
gst_editor_connection_connect (GstEditorConnection *connection)
{
if (connection->ghost) {
g_print("uhhh.... Boo!\n");
} else {
if (connection->fromsrc)
gst_pad_connect(connection->frompad->pad,connection->topad->pad);
else
gst_pad_connect(connection->topad->pad,connection->frompad->pad);
}
}