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