editor/gsteditorpad.c

   1 /* Gnome-Streamer
   2  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20
  21 #include <gnome.h>
  22 #include <gst/gst.h>
  23
  24 #include "gsteditor.h"
  25
  26 /* class functions */
  27 static void gst_editor_pad_class_init(GstEditorPadClass *klass);
  28 static void gst_editor_pad_init(GstEditorPad *pad);
  29 static void gst_editor_pad_set_arg(GtkObject *object,GtkArg *arg,guint id);
  30 static void gst_editor_pad_get_arg(GtkObject *object,GtkArg *arg,guint id);
  31 static void gst_editor_pad_realize(GstEditorPad *pad);
  32
  33 static void gst_editor_pad_position_changed(GstEditorPad *pad, GstEditorElement *element);
  34
  35 /* class implementation functions */
  36 //static void gst_editor_pad_update(GnomeCanvasItem *item,double *affine,
  37 //                                      ArtSVP *clip_path,int flags);
  38 //static gint gst_editor_pad_event(GnomeCanvasItem *item,GdkEvent *event);
  39
  40 /* events fired by items within self */
  41 static gint gst_editor_pad_padbox_event(GnomeCanvasItem *item,
  42                                         GdkEvent *event,
  43                                         GstEditorPad *pad);
  44
  45 /* utility functions */
  46 static void gst_editor_pad_resize(GstEditorPad *pad);
  47
  48
  49 enum {
  50   ARG_0,
  51   ARG_X,
  52   ARG_Y,
  53   ARG_WIDTH,
  54   ARG_HEIGHT,
  55   ARG_PAD,
  56 };
  57
  58 enum {
  59   LAST_SIGNAL
  60 };
  61
  62 static GtkObjectClass *parent_class;
  63 //static guint gst_editor_pad_signals[LAST_SIGNAL] = { 0 };
  64
  65 GtkType
  66 gst_editor_pad_get_type (void)
  67 {
  68   static GtkType pad_type = 0;
  69
  70   if (!pad_type) {
  71     static const GtkTypeInfo pad_info = {
  72       "GstEditorPad",
  73       sizeof(GstEditorPad),
  74       sizeof(GstEditorPadClass),
  75       (GtkClassInitFunc)gst_editor_pad_class_init,
  76       (GtkObjectInitFunc)gst_editor_pad_init,
  77       NULL,
  78       NULL,
  79       (GtkClassInitFunc)NULL,
  80     };
  81     pad_type = gtk_type_unique(gtk_object_get_type(),&pad_info);
  82   }
  83   return pad_type;
  84 }
  85
  86 static void
  87 gst_editor_pad_class_init (GstEditorPadClass *klass)
  88 {
  89   GtkObjectClass *object_class;
  90
  91   object_class = (GtkObjectClass*)klass;
  92
  93   parent_class = gtk_type_class(gtk_object_get_type());
  94
  95   gtk_object_add_arg_type("GstEditorPad::x",GTK_TYPE_DOUBLE,
  96                           GTK_ARG_READWRITE,ARG_X);
  97   gtk_object_add_arg_type("GstEditorPad::y",GTK_TYPE_DOUBLE,
  98                           GTK_ARG_READWRITE,ARG_Y);
  99   gtk_object_add_arg_type("GstEditorPad::width",GTK_TYPE_DOUBLE,
 100                           GTK_ARG_READWRITE,ARG_WIDTH);
 101   gtk_object_add_arg_type("GstEditorPad::height",GTK_TYPE_DOUBLE,
 102                           GTK_ARG_READWRITE,ARG_HEIGHT);
 103   gtk_object_add_arg_type("GstEditorPad::pad",GTK_TYPE_POINTER,
 104                           GTK_ARG_READWRITE,ARG_PAD);
 105
 106   klass->realize = gst_editor_pad_realize;
 107
 108   object_class->set_arg = gst_editor_pad_set_arg;
 109   object_class->get_arg = gst_editor_pad_get_arg;
 110 }
 111
 112 static void
 113 gst_editor_pad_init(GstEditorPad *pad)
 114 {
 115 }
 116
 117 GstEditorPad*
 118 gst_editor_pad_new(GstEditorElement *parent,GstPad *pad,
 119                    const gchar *first_arg_name, ...)
 120 {
 121   GstEditorPad *editorpad;
 122   va_list args;
 123
 124   g_return_val_if_fail(parent != NULL, NULL);
 125   g_return_val_if_fail(GST_IS_EDITOR_ELEMENT(parent), NULL);
 126   g_return_val_if_fail(pad != NULL, NULL);
 127   g_return_val_if_fail(GST_IS_PAD(pad), NULL);
 128
 129   editorpad = GST_EDITOR_PAD(gtk_type_new(GST_TYPE_EDITOR_PAD));
 130   editorpad->pad = pad;
 131   GST_EDITOR_SET_OBJECT(pad, editorpad);
 132
 133   va_start(args,first_arg_name);
 134   gst_editor_pad_construct(editorpad,parent,first_arg_name,args);
 135   va_end(args);
 136
 137   if (GST_PAD_CONNECTED (pad)) {
 138     GstPad *peerpad;
 139     GstEditorPad *peereditorpad;
 140
 141     // FIXME does this need to check for ghost/real?
 142     peerpad = GST_PAD_PEER(pad);
 143
 144     peereditorpad = GST_EDITOR_GET_OBJECT (peerpad);
 145
 146     if (peereditorpad) {
 147       GstEditorConnection *connection;
 148
 149       connection = gst_editor_connection_new (parent, editorpad);
 150       gst_editor_connection_set_endpad (connection, peereditorpad);
 151     }
 152   }
 153
 154   gtk_signal_connect_object (GTK_OBJECT (parent), "position_changed",
 155                              gst_editor_pad_position_changed, editorpad);
 156
 157   return editorpad;
 158 }
 159
 160 void
 161 gst_editor_pad_construct(GstEditorPad *pad,
 162                          GstEditorElement *parent,
 163                          const gchar *first_arg_name,va_list args)
 164 {
 165   GtkObject *obj = GTK_OBJECT(pad);
 166   GSList *arg_list = NULL, *info_list = NULL;
 167   gchar *error;
 168   GstEditorPadClass *padclass;
 169
 170 //  g_print("in gst_editor_pad_construct()\n");
 171
 172   error = gtk_object_args_collect(GTK_OBJECT_TYPE(obj),&arg_list,
 173                                   &info_list,first_arg_name,args);
 174   if (error) {
 175     g_warning("gst_editor_pad_construct(): %s",error);
 176     g_free(error);
 177   } else {
 178     GSList *arg,*info;
 179 //    g_print("setting all the arguments on the pad\n");
 180     for (arg=arg_list,info=info_list;arg;arg=arg->next,info=info->next)
 181       gtk_object_arg_set(obj,arg->data,info->data);
 182     gtk_args_collect_cleanup(arg_list,info_list);
 183   }
 184
 185   pad->parent = parent;
 186
 187   padclass = GST_EDITOR_PAD_CLASS(GTK_OBJECT(pad)->klass);
 188   if (padclass)
 189     (padclass->realize)(pad);
 190 }
 191
 192 static void
 193 gst_editor_pad_set_arg (GtkObject *object,GtkArg *arg,guint id)
 194 {
 195   GstEditorPad *pad;
 196
 197   /* get the major types of this object */
 198   pad = GST_EDITOR_PAD(object);
 199
 200   switch (id) {
 201     case ARG_X:
 202       pad->x = GTK_VALUE_DOUBLE(*arg);
 203       break;
 204     case ARG_Y:
 205       pad->y = GTK_VALUE_DOUBLE(*arg);
 206       break;
 207     case ARG_WIDTH:
 208       pad->width = GTK_VALUE_DOUBLE(*arg);
 209       pad->resize = TRUE;
 210       break;
 211     case ARG_HEIGHT:
 212       pad->height = GTK_VALUE_DOUBLE(*arg);
 213       pad->resize = TRUE;
 214       break;
 215     case ARG_PAD:
 216       /* FIXME: this is very brute force */
 217       pad->pad = GTK_VALUE_POINTER(*arg);
 218       break;
 219     default:
 220       g_warning("gsteditorpad: unknown arg!");
 221       break;
 222   }
 223 }
 224
 225 static void
 226 gst_editor_pad_get_arg (GtkObject *object,GtkArg *arg,guint id)
 227 {
 228   GstEditorPad *pad;
 229
 230   /* get the major types of this object */
 231   pad = GST_EDITOR_PAD(object);
 232
 233   switch (id) {
 234     case ARG_X:
 235       GTK_VALUE_INT(*arg) = pad->x;
 236       break;
 237     case ARG_Y:
 238       GTK_VALUE_INT(*arg) = pad->y;
 239       break;
 240     case ARG_WIDTH:
 241       GTK_VALUE_INT(*arg) = pad->width;
 242       break;
 243     case ARG_HEIGHT:
 244       GTK_VALUE_INT(*arg) = pad->height;
 245       break;
 246     default:
 247       arg->type = GTK_TYPE_INVALID;
 248       break;
 249   }
 250 }
 251
 252 static void
 253 gst_editor_pad_realize (GstEditorPad *pad)
 254 {
 255 //  g_print("realizing editor pad %p\n",pad);
 256
 257   /* we must be attached to an element */
 258   g_return_if_fail(pad->parent != NULL);
 259
 260   /* create the group and bounding box */
 261   pad->group = GNOME_CANVAS_GROUP(gnome_canvas_item_new(pad->parent->group,
 262     gnome_canvas_group_get_type(),"x",pad->x,"y",pad->y,NULL));
 263   g_return_if_fail(pad->group != NULL);
 264   GST_EDITOR_SET_OBJECT(pad->group,pad);
 265
 266   pad->border = gnome_canvas_item_new(pad->group,
 267     gnome_canvas_rect_get_type(),
 268     "width_units",1.0,"fill_color_rgba", 0xCCFFCC00,"outline_color","black",
 269     "x1",0.0,"y1",0.0,"x2",pad->width,"y2",pad->height,NULL);
 270   g_return_if_fail(pad->border != NULL);
 271   GST_EDITOR_SET_OBJECT(pad->border,pad);
 272
 273   /* create the pad box on the correct side */
 274   // FIXME does this need to check for ghost/real?
 275   pad->issrc = (GST_PAD_DIRECTION(pad->pad) == GST_PAD_SRC);
 276   if (pad->issrc)
 277     pad->padbox = gnome_canvas_item_new(pad->group,
 278       gnome_canvas_rect_get_type(),
 279       "width_units",1.0,"fill_color","white","outline_color","black",
 280       "x1",pad->x-4.0,"y1",2.0,"x2",pad->x,"y2",pad->height-2.0,NULL);
 281   else
 282     pad->padbox = gnome_canvas_item_new(pad->group,
 283       gnome_canvas_rect_get_type(),
 284       "width_units",1.0,"fill_color","white","outline_color","black",
 285       "x1",0.0,"y1",2.0,"x2",4.0,"y2",pad->height-2.0,NULL);
 286   g_return_if_fail(pad->padbox != NULL);
 287   GST_EDITOR_SET_OBJECT(pad->padbox,pad);
 288
 289   gtk_signal_connect(GTK_OBJECT(pad->group),"event",
 290     GTK_SIGNAL_FUNC(gst_editor_pad_padbox_event),pad);
 291
 292   pad->title = gnome_canvas_item_new(pad->group,
 293     gnome_canvas_text_get_type(),
 294     "text",gst_pad_get_name(pad->pad),
 295     "x",0.0,"y",0.0,"anchor",GTK_ANCHOR_NORTH_WEST,
 296     "font_gdk",gtk_widget_get_default_style()->font,
 297     NULL);
 298   g_return_if_fail(pad->title != NULL);
 299   GST_EDITOR_SET_OBJECT(pad->title,pad);
 300
 301   pad->realized = TRUE;
 302   pad->resize = TRUE;
 303   gst_editor_pad_repack(pad);
 304 }
 305
 306
 307 static void
 308 gst_editor_pad_resize (GstEditorPad *pad)
 309 {
 310   gdouble minwidth,minheight;
 311
 312 //  g_print("resizing pad\n");
 313
 314   minwidth = 0;minheight = 0;
 315
 316   /* get the text size and add it into minsize */
 317   minwidth = gst_util_get_double_arg(GTK_OBJECT(pad->title),
 318                                      "text_width") + 2.0;
 319   minheight = gst_util_get_double_arg(GTK_OBJECT(pad->title),
 320                                       "text_height");
 321
 322   /* calculate the size of the padbox */
 323   pad->boxheight = minheight - 4.0;
 324   pad->boxwidth = pad->boxheight / 2.0;
 325   minwidth += pad->boxwidth;
 326
 327   /* force the thing to grow if necessary */
 328   pad->width = MAX(pad->width,minwidth);
 329   pad->height = MAX(pad->height,minheight);
 330
 331   /* update the connection if there is one */
 332 //  g_print("connection is %p\n",pad->connection);
 333   if (pad->connection != NULL)
 334     gst_editor_connection_resize(pad->connection);
 335 }
 336
 337 void
 338 gst_editor_pad_repack (GstEditorPad *pad)
 339 {
 340   gdouble x1,y1,x2,y2;
 341
 342   if (!pad->realized) return;
 343
 344   gst_editor_pad_resize(pad);
 345
 346   x1 = 0;y1 = 0;
 347   x2 = x1 + pad->width;y2 = y1 + pad->height;
 348 //  g_print("repacking pad at %.2fx%.2f - %.2fx%.2f\n",x1,y1,x2,y2);
 349
 350   /* move the group */
 351   gtk_object_set(GTK_OBJECT(pad->group),"x",pad->x,"y",pad->y,NULL);
 352
 353   /* start by resizing the bordering box */
 354   gtk_object_set(GTK_OBJECT(pad->border),
 355                  "x1",x1,"y1",y1,"x2",x2,"y2",y2,NULL);
 356
 357   /* if we're a left-jusified sink */
 358   if (pad->issrc) {
 359     /* and move the pad box */
 360     gtk_object_set(GTK_OBJECT(pad->padbox),
 361                    "x1",x2-pad->boxwidth,"y1",y1+2.0,
 362                    "x2",x2,"y2",y2-2.0,NULL);
 363     /* then move the text to the right place */
 364     gtk_object_set(GTK_OBJECT(pad->title),
 365                    "x",x2-pad->boxwidth-1.0,"y",y1,
 366                    "anchor",GTK_ANCHOR_NORTH_EAST,
 367                    NULL);
 368   } else {
 369     /* and move the pad box */
 370     gtk_object_set(GTK_OBJECT(pad->padbox),
 371                    "x1",x1,"y1",y1+2.0,
 372                    "x2",x1+pad->boxwidth,"y2",y2-2.0,NULL);
 373     /* then move the text to the right place */
 374     gtk_object_set(GTK_OBJECT(pad->title),
 375                    "x",x1+pad->boxwidth+1.0,"y",y1,
 376                    "anchor",GTK_ANCHOR_NORTH_WEST,
 377                    NULL);
 378   }
 379
 380   if (pad->connection != NULL) {
 381     pad->connection->resize = TRUE;
 382     gst_editor_connection_resize(pad->connection);
 383   }
 384
 385   pad->resize = FALSE;
 386 }
 387
 388
 389 /*
 390 static gint gst_editor_pad_event(GnomeCanvasItem *item,GdkEvent *event) {
 391   GstEditorPad *pad = GST_EDITOR_PAD(item);
 392   gdouble item_x,item_y;
 393   GdkCursor *fleur;
 394   gdouble tx,ty;
 395
 396   item_x = event->button.x;
 397   item_y = event->button.y;
 398   gnome_canvas_item_w2i(item->parent,&item_x,&item_y);
 399
 400   switch(event->type) {
 401     case GDK_ENTER_NOTIFY:
 402 //      g_print("entered pad\n");
 403       break;
 404     case GDK_LEAVE_NOTIFY:
 405 //      g_print("left pad\n");
 406       break;
 407     default:
 408       break;
 409   }
 410   return FALSE;
 411 }
 412 */
 413
 414 /* FIXME FIXME FIXME */
 415 static gint
 416 gst_editor_pad_padbox_event(GnomeCanvasItem *item,
 417                             GdkEvent *event,
 418                             GstEditorPad *pad)
 419 {
 420   GstEditorElement *element;
 421   GstEditorBin *bin;
 422
 423 //  g_print("padbox has event %d\n",event->type);
 424   g_return_val_if_fail(GST_IS_EDITOR_PAD(pad), FALSE);
 425
 426   element = pad->parent;
 427   bin = element->parent;
 428
 429   switch(event->type) {
 430     case GDK_ENTER_NOTIFY:
 431       gtk_object_set(GTK_OBJECT(pad->border),
 432                  "fill_color_rgba", 0xBBDDBB00, NULL);
 433       break;
 434     case GDK_LEAVE_NOTIFY:
 435       gtk_object_set(GTK_OBJECT(pad->border),
 436                  "fill_color_rgba", 0xCCFFCC00, NULL);
 437       break;
 438     case GDK_BUTTON_PRESS:
 439 //      g_print("have button press in pad '%s'\n",
 440 //              gst_pad_get_name(pad->pad));
 441       gst_editor_bin_start_banding(bin,pad);
 442       return TRUE;
 443       break;
 444     case GDK_MOTION_NOTIFY:
 445 //      g_print("have motion in pad\n");
 446       break;
 447     default:
 448       break;
 449   }
 450   return FALSE;
 451 }
 452
 453 static void
 454 gst_editor_pad_position_changed(GstEditorPad *pad,
 455                                 GstEditorElement *element)
 456 {
 457   GList *pads;
 458
 459   if (pad->connection) {
 460 //      g_print("updating pad's connection\n");
 461     pad->connection->resize = TRUE;
 462     gst_editor_connection_resize(pad->connection);
 463   }
 464 }