chiark - git - mdw - disorder/blob - disobedience/choose.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2008 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20 /** @file disobedience/choose.c
  21  * @brief Hierarchical track selection and search
  22  *
  23  * We now use an ordinary GtkTreeStore/GtkTreeView.
  24  *
  25  * We don't want to pull the entire tree in memory, but we want directories to
  26  * show up as having children.  Therefore we give directories a placeholder
  27  * child and replace their children when they are opened.  Placeholders have
  28  * TRACK_COLUMN="" and ISFILE_COLUMN=FALSE (so that they don't get check boxes,
  29  * lengths, etc).
  30  *
  31  * TODO:
  32  * - sweep up contracted nodes, replacing their content with a placeholder
  33  */
  34
  35 #include "disobedience.h"
  36 #include "choose.h"
  37 #include <gdk/gdkkeysyms.h>
  38
  39 /** @brief The current selection tree */
  40 GtkTreeStore *choose_store;
  41
  42 /** @brief The view onto the selection tree */
  43 GtkWidget *choose_view;
  44
  45 /** @brief The selection tree's selection */
  46 GtkTreeSelection *choose_selection;
  47
  48 /** @brief Count of file listing operations in flight */
  49 static int choose_list_in_flight;
  50
  51 /** @brief If nonzero autocollapse column won't be set */
  52 static int choose_suppress_set_autocollapse;
  53
  54 static char *choose_get_string(GtkTreeIter *iter, int column) {
  55   gchar *gs;
  56   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  57                      column, &gs,
  58                      -1);
  59   char *s = xstrdup(gs);
  60   g_free(gs);
  61   return s;
  62 }
  63
  64 char *choose_get_track(GtkTreeIter *iter) {
  65   char *s = choose_get_string(iter, TRACK_COLUMN);
  66   return *s ? s : 0;                    /* Placeholder -> NULL */
  67 }
  68
  69 char *choose_get_sort(GtkTreeIter *iter) {
  70   return choose_get_string(iter, SORT_COLUMN);
  71 }
  72
  73 char *choose_get_display(GtkTreeIter *iter) {
  74   return choose_get_string(iter, NAME_COLUMN);
  75 }
  76
  77 int choose_is_file(GtkTreeIter *iter) {
  78   gboolean isfile;
  79   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  80                      ISFILE_COLUMN, &isfile,
  81                      -1);
  82   return isfile;
  83 }
  84
  85 int choose_is_dir(GtkTreeIter *iter) {
  86   gboolean isfile;
  87   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  88                      ISFILE_COLUMN, &isfile,
  89                      -1);
  90   if(isfile)
  91     return FALSE;
  92   return !choose_is_placeholder(iter);
  93 }
  94
  95 int choose_is_placeholder(GtkTreeIter *iter) {
  96   return choose_get_string(iter, TRACK_COLUMN)[0] == 0;
  97 }
  98
  99 int choose_can_autocollapse(GtkTreeIter *iter) {
 100   gboolean autocollapse;
 101   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
 102                      AUTOCOLLAPSE_COLUMN, &autocollapse,
 103                      -1);
 104   return autocollapse;
 105 }
 106
 107 /** @brief Remove node @p it and all its children
 108  * @param Iterator, updated to point to next
 109  * @return True if iterator remains valid
 110  *
 111  * TODO is this necessary?  gtk_tree_store_remove() does not document what
 112  * happens to children.
 113  */
 114 static gboolean choose_remove_node(GtkTreeIter *it) {
 115   GtkTreeIter child[1];
 116   gboolean childv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
 117                                                  child,
 118                                                  it);
 119   while(childv)
 120     childv = choose_remove_node(child);
 121   return gtk_tree_store_remove(choose_store, it);
 122 }
 123
 124 /** @brief Update length and state fields */
 125 static gboolean choose_set_state_callback(GtkTreeModel attribute((unused)) *model,
 126                                           GtkTreePath attribute((unused)) *path,
 127                                           GtkTreeIter *it,
 128                                           gpointer attribute((unused)) data) {
 129   if(choose_is_file(it)) {
 130     const char *track = choose_get_track(it);
 131     const long l = namepart_length(track);
 132     char length[64];
 133     if(l > 0)
 134       byte_snprintf(length, sizeof length, "%ld:%02ld", l / 60, l % 60);
 135     else
 136       length[0] = 0;
 137     gtk_tree_store_set(choose_store, it,
 138                        LENGTH_COLUMN, length,
 139                        STATE_COLUMN, queued(track),
 140                        -1);
 141     if(choose_is_search_result(track))
 142       gtk_tree_store_set(choose_store, it,
 143                          BG_COLUMN, SEARCH_RESULT_BG,
 144                          FG_COLUMN, SEARCH_RESULT_FG,
 145                          -1);
 146     else
 147       gtk_tree_store_set(choose_store, it,
 148                          BG_COLUMN, (char *)0,
 149                          FG_COLUMN, (char *)0,
 150                          -1);
 151   }
 152   return FALSE;                         /* continue walking */
 153 }
 154
 155 /** @brief Called when the queue or playing track change */
 156 static void choose_set_state(const char attribute((unused)) *event,
 157                              void attribute((unused)) *eventdata,
 158                              void attribute((unused)) *callbackdata) {
 159   gtk_tree_model_foreach(GTK_TREE_MODEL(choose_store),
 160                          choose_set_state_callback,
 161                          NULL);
 162 }
 163
 164 /** @brief (Re-)populate a node
 165  * @param parent_ref Node to populate or NULL to fill root
 166  * @param nvec Number of children to add
 167  * @param vec Children
 168  * @param files 1 if children are files, 0 if directories
 169  *
 170  * Adjusts the set of files (or directories) below @p parent_ref to match those
 171  * listed in @p nvec and @p vec.
 172  *
 173  * @parent_ref will be destroyed.
 174  */
 175 static void choose_populate(GtkTreeRowReference *parent_ref,
 176                             int nvec, char **vec,
 177                             int isfile) {
 178   const char *type = isfile ? "track" : "dir";
 179   //fprintf(stderr, "%d new children of type %s\n", nvec, type);
 180   if(!nvec)
 181     goto skip;
 182   /* Compute parent_* */
 183   GtkTreeIter pit[1], *parent_it;
 184   GtkTreePath *parent_path;
 185   if(parent_ref) {
 186     parent_path = gtk_tree_row_reference_get_path(parent_ref);
 187     parent_it = pit;
 188     gboolean pitv = gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store),
 189                                             pit, parent_path);
 190     assert(pitv);
 191     /*fprintf(stderr, "choose_populate %s: parent path is [%s]\n",
 192             type,
 193             gtk_tree_path_to_string(parent_path));*/
 194   } else {
 195     parent_path = 0;
 196     parent_it = 0;
 197     /*fprintf(stderr, "choose_populate %s: populating the root\n",
 198             type);*/
 199   }
 200   /* Both td[] and the current node set are sorted so we can do a single linear
 201    * pass to insert new nodes and remove unwanted ones.  The total performance
 202    * may be worse than linear depending on the performance of GTK+'s insert and
 203    * delete operations. */
 204   //fprintf(stderr, "sorting tracks\n");
 205   struct tracksort_data *td = tracksort_init(nvec, vec, type);
 206   GtkTreeIter it[1];
 207   gboolean itv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
 208                                               it,
 209                                               parent_it);
 210   int inserted = 0, deleted_placeholder = 0;
 211   //fprintf(stderr, "inserting tracks type=%s\n", type);
 212   while(nvec > 0 || itv) {
 213     /*fprintf(stderr, "td[] = %s, it=%s [%s]\n",
 214             nvec > 0 ? td->track : "(none)",
 215             itv ? choose_get_track(it) : "(!itv)",
 216             itv ? (choose_is_file(it) ? "file" : "dir") : "");*/
 217     enum { INSERT, DELETE, SKIP_TREE, SKIP_BOTH } action;
 218     const char *track = itv ? choose_get_track(it) : 0;
 219     if(itv && !track) {
 220       //fprintf(stderr, " placeholder\n");
 221       action = DELETE;
 222       ++deleted_placeholder;
 223     } else if(nvec > 0 && itv) {
 224       /* There's both a tree row and a td[] entry */
 225       const int cmp = compare_tracks(td->sort, choose_get_sort(it),
 226                                      td->display, choose_get_display(it),
 227                                      td->track, track);
 228       //fprintf(stderr, " cmp=%d\n", cmp);
 229       if(cmp < 0)
 230         /* td < it, so we insert td before it */
 231         action = INSERT;
 232       else if(cmp > 0) {
 233         /* td > it, so we must either delete it (if the same type) or skip it */
 234         if(choose_is_file(it) == isfile)
 235           action = DELETE;
 236         else
 237           action = SKIP_TREE;
 238       } else
 239         /* td = it, so we step past both */
 240         action = SKIP_BOTH;
 241     } else if(nvec > 0) {
 242       /* We've reached the end of the tree rows, but new have tracks left in
 243        * td[] */
 244       //fprintf(stderr, " inserting\n");
 245       action = INSERT;
 246     } else {
 247       /* We've reached the end of the new tracks from td[], but there are
 248        * further tracks in the tree */
 249       //fprintf(stderr, " deleting\n");
 250       if(choose_is_file(it) == isfile)
 251         action = DELETE;
 252       else
 253         action = SKIP_TREE;
 254     }
 255
 256     switch(action) {
 257     case INSERT: {
 258       //fprintf(stderr, " INSERT %s\n", td->track);
 259       /* Insert a new row from td[] before it, or at the end if it is no longer
 260        * valid */
 261       GtkTreeIter child[1];
 262       gtk_tree_store_insert_before(choose_store,
 263                                    child, /* new row */
 264                                    parent_it, /* parent */
 265                                    itv ? it : NULL); /* successor */
 266       gtk_tree_store_set(choose_store, child,
 267                          NAME_COLUMN, td->display,
 268                          ISFILE_COLUMN, isfile,
 269                          TRACK_COLUMN, td->track,
 270                          SORT_COLUMN, td->sort,
 271                          AUTOCOLLAPSE_COLUMN, FALSE,
 272                          -1);
 273       /* Update length and state; we expect this to kick off length lookups
 274        * rather than necessarily get the right value the first time round. */
 275       choose_set_state_callback(0, 0, child, 0);
 276       /* If we inserted a directory, insert a placeholder too, so it appears to
 277        * have children; it will be deleted when we expand the directory. */
 278       if(!isfile) {
 279         //fprintf(stderr, "  inserting a placeholder\n");
 280         GtkTreeIter placeholder[1];
 281
 282         gtk_tree_store_append(choose_store, placeholder, child);
 283         gtk_tree_store_set(choose_store, placeholder,
 284                            NAME_COLUMN, "Waddling...",
 285                            TRACK_COLUMN, "",
 286                            ISFILE_COLUMN, FALSE,
 287                            -1);
 288       }
 289       ++inserted;
 290       ++td;
 291       --nvec;
 292       break;
 293     }
 294     case SKIP_BOTH:
 295       //fprintf(stderr, " SKIP_BOTH\n");
 296       ++td;
 297       --nvec;
 298       /* fall thru */
 299     case SKIP_TREE:
 300       //fprintf(stderr, " SKIP_TREE\n");
 301       itv = gtk_tree_model_iter_next(GTK_TREE_MODEL(choose_store), it);
 302       break;
 303     case DELETE:
 304       //fprintf(stderr, " DELETE\n");
 305       itv = choose_remove_node(it);
 306       break;
 307     }
 308   }
 309   /*fprintf(stderr, "inserted=%d deleted_placeholder=%d\n\n",
 310           inserted, deleted_placeholder);*/
 311   if(parent_ref) {
 312     /* If we deleted a placeholder then we must re-expand the row */
 313     if(deleted_placeholder) {
 314       ++choose_suppress_set_autocollapse;
 315       gtk_tree_view_expand_row(GTK_TREE_VIEW(choose_view), parent_path, FALSE);
 316       --choose_suppress_set_autocollapse;
 317     }
 318     gtk_tree_row_reference_free(parent_ref);
 319     gtk_tree_path_free(parent_path);
 320   }
 321 skip:
 322   /* We only notify others that we've inserted tracks when there are no more
 323    * insertions pending, so that they don't have to keep track of how many
 324    * requests they've made.  */
 325   if(--choose_list_in_flight == 0) {
 326     /* Notify interested parties that we inserted some tracks, AFTER making
 327      * sure that the row is properly expanded */
 328     //fprintf(stderr, "raising choose-more-tracks\n");
 329     event_raise("choose-more-tracks", 0);
 330   }
 331   //fprintf(stderr, "choose_list_in_flight -> %d-\n", choose_list_in_flight);
 332 }
 333
 334 static void choose_dirs_completed(void *v,
 335                                   const char *err,
 336                                   int nvec, char **vec) {
 337   if(err) {
 338     popup_protocol_error(0, err);
 339     return;
 340   }
 341   choose_populate(v, nvec, vec, 0/*!isfile*/);
 342 }
 343
 344 static void choose_files_completed(void *v,
 345                                    const char *err,
 346                                    int nvec, char **vec) {
 347   if(err) {
 348     popup_protocol_error(0, err);
 349     return;
 350   }
 351   choose_populate(v, nvec, vec, 1/*isfile*/);
 352 }
 353
 354 void choose_play_completed(void attribute((unused)) *v,
 355                            const char *err) {
 356   if(err)
 357     popup_protocol_error(0, err);
 358 }
 359
 360 static void choose_state_toggled
 361     (GtkCellRendererToggle attribute((unused)) *cell_renderer,
 362      gchar *path_str,
 363      gpointer attribute((unused)) user_data) {
 364   GtkTreeIter it[1];
 365   /* Identify the track */
 366   gboolean itv =
 367     gtk_tree_model_get_iter_from_string(GTK_TREE_MODEL(choose_store),
 368                                         it,
 369                                         path_str);
 370   if(!itv)
 371     return;
 372   if(!choose_is_file(it))
 373     return;
 374   const char *track = choose_get_track(it);
 375   if(queued(track))
 376     return;
 377   disorder_eclient_play(client, track, choose_play_completed, 0);
 378
 379 }
 380
 381 /** @brief (Re-)get the children of @p path
 382  * @param path Path to target row
 383  * @param iter Iterator pointing at target row
 384  *
 385  * Called from choose_row_expanded() to make sure that the contents are present
 386  * and from choose_refill_callback() to (re-)synchronize.
 387  */
 388 static void choose_refill_row(GtkTreePath *path,
 389                               GtkTreeIter *iter) {
 390   const char *track = choose_get_track(iter);
 391   disorder_eclient_files(client, choose_files_completed,
 392                          track,
 393                          NULL,
 394                          gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
 395                                                     path));
 396   disorder_eclient_dirs(client, choose_dirs_completed,
 397                         track,
 398                         NULL,
 399                         gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
 400                                                    path));
 401   /* The row references are destroyed in the _completed handlers. */
 402   choose_list_in_flight += 2;
 403 }
 404
 405 static void choose_row_expanded(GtkTreeView attribute((unused)) *treeview,
 406                                 GtkTreeIter *iter,
 407                                 GtkTreePath *path,
 408                                 gpointer attribute((unused)) user_data) {
 409   /*fprintf(stderr, "row-expanded path=[%s]\n\n",
 410           gtk_tree_path_to_string(path));*/
 411   /* We update a node's contents whenever it is expanded, even if it was
 412    * already populated; the effect is that contracting and expanding a node
 413    * suffices to update it to the latest state on the server. */
 414   choose_refill_row(path, iter);
 415   if(!choose_suppress_set_autocollapse) {
 416     if(choose_auto_expanding) {
 417       /* This was an automatic expansion; mark it the row for auto-collapse. */
 418       gtk_tree_store_set(choose_store, iter,
 419                          AUTOCOLLAPSE_COLUMN, TRUE,
 420                          -1);
 421       /*fprintf(stderr, "enable auto-collapse for %s\n",
 422               gtk_tree_path_to_string(path));*/
 423     } else {
 424       /* This was a manual expansion.  Inhibit automatic collapse on this row
 425        * and all its ancestors.  */
 426       gboolean itv;
 427       do {
 428         gtk_tree_store_set(choose_store, iter,
 429                            AUTOCOLLAPSE_COLUMN, FALSE,
 430                            -1);
 431         /*fprintf(stderr, "suppress auto-collapse for %s\n",
 432                 gtk_tree_model_get_string_from_iter(GTK_TREE_MODEL(choose_store),
 433                                                     iter));*/
 434         GtkTreeIter child = *iter;
 435         itv = gtk_tree_model_iter_parent(GTK_TREE_MODEL(choose_store),
 436                                          iter,
 437                                          &child);
 438       } while(itv);
 439       /* The effect of this is that if you expand a row that's actually a
 440        * sibling of the real target of the auto-expansion, it stays expanded
 441        * when you clear a search.  That's find and good, but it _still_ stays
 442        * expanded if you expand it and then collapse it.
 443        *
 444        * An alternative policy would be to only auto-collapse rows that don't
 445        * have any expanded children (apart from ones also subject to
 446        * auto-collapse).  I'm not sure what the most usable policy is.
 447        */
 448     }
 449   }
 450 }
 451
 452 static void choose_auto_collapse_callback(GtkTreeView *tree_view,
 453                                           GtkTreePath *path,
 454                                           gpointer attribute((unused)) user_data) {
 455   GtkTreeIter it[1];
 456
 457   gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), it, path);
 458   if(choose_can_autocollapse(it)) {
 459     /*fprintf(stderr, "collapse %s\n",
 460             gtk_tree_path_to_string(path));*/
 461     gtk_tree_store_set(choose_store, it,
 462                        AUTOCOLLAPSE_COLUMN, FALSE,
 463                        -1);
 464     gtk_tree_view_collapse_row(tree_view, path);
 465   }
 466 }
 467
 468 /** @brief Perform automatic collapse after a search is cleared */
 469 void choose_auto_collapse(void) {
 470   gtk_tree_view_map_expanded_rows(GTK_TREE_VIEW(choose_view),
 471                                   choose_auto_collapse_callback,
 472                                   0);
 473 }
 474
 475 /** @brief Called from choose_refill() with each expanded row */
 476 static void choose_refill_callback(GtkTreeView attribute((unused)) *tree_view,
 477                                    GtkTreePath *path,
 478                                    gpointer attribute((unused)) user_data) {
 479   GtkTreeIter it[1];
 480
 481   gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), it, path);
 482   choose_refill_row(path, it);
 483 }
 484
 485 /** @brief Synchronize all visible data with the server
 486  *
 487  * Called at startup, when a rescan completes, and via periodic_slow().
 488  */
 489 static void choose_refill(const char attribute((unused)) *event,
 490                           void attribute((unused)) *eventdata,
 491                           void attribute((unused)) *callbackdata) {
 492   //fprintf(stderr, "choose_refill\n");
 493   /* Update the root */
 494   disorder_eclient_files(client, choose_files_completed, "", NULL, NULL);
 495   disorder_eclient_dirs(client, choose_dirs_completed, "", NULL, NULL);
 496   choose_list_in_flight += 2;
 497   /* Update all expanded rows */
 498   gtk_tree_view_map_expanded_rows(GTK_TREE_VIEW(choose_view),
 499                                   choose_refill_callback,
 500                                   0);
 501   //fprintf(stderr, "choose_list_in_flight -> %d+\n", choose_list_in_flight);
 502 }
 503
 504 /** @brief Called for key-*-event on the main view
 505  */
 506 static gboolean choose_key_event(GtkWidget attribute((unused)) *widget,
 507                                  GdkEventKey *event,
 508                                  gpointer attribute((unused)) user_data) {
 509   /*fprintf(stderr, "choose_key_event type=%d state=%#x keyval=%#x\n",
 510           event->type, event->state, event->keyval);*/
 511   switch(event->keyval) {
 512   case GDK_Page_Up:
 513   case GDK_Page_Down:
 514   case GDK_Up:
 515   case GDK_Down:
 516   case GDK_Home:
 517   case GDK_End:
 518     return FALSE;                       /* We'll take these */
 519   case 'f': case 'F':
 520     /* ^F is expected to start a search.  We implement this by focusing the
 521      * search entry box. */
 522     if((event->state & ~(GDK_LOCK_MASK|GDK_SHIFT_MASK)) == GDK_CONTROL_MASK
 523        && event->type == GDK_KEY_PRESS) {
 524       choose_search_new();
 525       return TRUE;                      /* Handled it */
 526     }
 527     break;
 528   case 'g': case 'G':
 529     /* ^G is expected to go the next match.  We simulate a click on the 'next'
 530      * button. */
 531     if((event->state & ~(GDK_LOCK_MASK|GDK_SHIFT_MASK)) == GDK_CONTROL_MASK
 532        && event->type == GDK_KEY_PRESS) {
 533       choose_next_clicked(0, 0);
 534       return TRUE;                      /* Handled it */
 535     }
 536     break;
 537   }
 538   gtk_widget_event(user_data, (GdkEvent *)event);
 539   return TRUE;                          /* Handled it */
 540 }
 541
 542 /** @brief Create the choose tab */
 543 GtkWidget *choose_widget(void) {
 544   /* Create the tree store. */
 545   choose_store = gtk_tree_store_new(CHOOSE_COLUMNS,
 546                                     G_TYPE_BOOLEAN,
 547                                     G_TYPE_STRING,
 548                                     G_TYPE_STRING,
 549                                     G_TYPE_BOOLEAN,
 550                                     G_TYPE_STRING,
 551                                     G_TYPE_STRING,
 552                                     G_TYPE_STRING,
 553                                     G_TYPE_STRING,
 554                                     G_TYPE_BOOLEAN);
 555
 556   /* Create the view */
 557   choose_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(choose_store));
 558   gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(choose_view), TRUE);
 559   /* Suppress built-in typeahead find, we do our own search support. */
 560   gtk_tree_view_set_enable_search(GTK_TREE_VIEW(choose_view), FALSE);
 561
 562   /* Create cell renderers and columns */
 563   /* TODO use a table */
 564   {
 565     GtkCellRenderer *r = gtk_cell_renderer_toggle_new();
 566     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 567       ("Queued",
 568        r,
 569        "active", STATE_COLUMN,
 570        "visible", ISFILE_COLUMN,
 571        (char *)0);
 572     gtk_tree_view_column_set_resizable(c, TRUE);
 573     gtk_tree_view_column_set_reorderable(c, TRUE);
 574     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 575     g_signal_connect(r, "toggled",
 576                      G_CALLBACK(choose_state_toggled), 0);
 577   }
 578   {
 579     GtkCellRenderer *r = gtk_cell_renderer_text_new();
 580     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 581       ("Length",
 582        r,
 583        "text", LENGTH_COLUMN,
 584        (char *)0);
 585     gtk_tree_view_column_set_resizable(c, TRUE);
 586     gtk_tree_view_column_set_reorderable(c, TRUE);
 587     g_object_set(r, "xalign", (gfloat)1.0, (char *)0);
 588     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 589   }
 590   {
 591     GtkCellRenderer *r = gtk_cell_renderer_text_new();
 592     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 593       ("Track",
 594        r,
 595        "text", NAME_COLUMN,
 596        "background", BG_COLUMN,
 597        "foreground", FG_COLUMN,
 598        (char *)0);
 599     gtk_tree_view_column_set_resizable(c, TRUE);
 600     gtk_tree_view_column_set_reorderable(c, TRUE);
 601     g_object_set(c, "expand", TRUE, (char *)0);
 602     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 603     gtk_tree_view_set_expander_column(GTK_TREE_VIEW(choose_view), c);
 604   }
 605
 606   /* The selection should support multiple things being selected */
 607   choose_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(choose_view));
 608   gtk_tree_selection_set_mode(choose_selection, GTK_SELECTION_MULTIPLE);
 609
 610   /* Catch button presses */
 611   g_signal_connect(choose_view, "button-press-event",
 612                    G_CALLBACK(choose_button_event), 0);
 613   g_signal_connect(choose_view, "button-release-event",
 614                    G_CALLBACK(choose_button_event), 0);
 615   /* Catch row expansions so we can fill in placeholders */
 616   g_signal_connect(choose_view, "row-expanded",
 617                    G_CALLBACK(choose_row_expanded), 0);
 618
 619   event_register("queue-list-changed", choose_set_state, 0);
 620   event_register("playing-track-changed", choose_set_state, 0);
 621   event_register("search-results-changed", choose_set_state, 0);
 622   event_register("lookups-completed", choose_set_state, 0);
 623
 624   /* After a rescan we update the choose tree.  We get a rescan-complete
 625    * automatically at startup and upon connection too. */
 626   event_register("rescan-complete", choose_refill, 0);
 627
 628   /* Make the widget scrollable */
 629   GtkWidget *scrolled = scroll_widget(choose_view);
 630
 631   /* Pack vertically with the search widget */
 632   GtkWidget *vbox = gtk_vbox_new(FALSE/*homogenous*/, 1/*spacing*/);
 633   gtk_box_pack_start(GTK_BOX(vbox), scrolled,
 634                      TRUE/*expand*/, TRUE/*fill*/, 0/*padding*/);
 635   gtk_box_pack_end(GTK_BOX(vbox), choose_search_widget(),
 636                    FALSE/*expand*/, FALSE/*fill*/, 0/*padding*/);
 637
 638   g_object_set_data(G_OBJECT(vbox), "type", (void *)&choose_tabtype);
 639
 640   /* Redirect keyboard activity to the search widget */
 641   g_signal_connect(choose_view, "key-press-event",
 642                    G_CALLBACK(choose_key_event), choose_search_entry);
 643   g_signal_connect(choose_view, "key-release-event",
 644                    G_CALLBACK(choose_key_event), choose_search_entry);
 645
 646   return vbox;
 647 }
 648
 649 /*
 650 Local Variables:
 651 c-basic-offset:2
 652 comment-column:40
 653 fill-column:79
 654 indent-tabs-mode:nil
 655 End:
 656 */