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 "multidrag.h"
  36 #include <gdk/gdkkeysyms.h>
  37
  38 /** @brief Drag types */
  39 static const GtkTargetEntry choose_targets[] = {
  40   {
  41     (char *)"text/x-disorder-playable-tracks", /* drag type */
  42     GTK_TARGET_SAME_APP|GTK_TARGET_OTHER_WIDGET, /* copying between widgets */
  43     1                                     /* ID value */
  44   },
  45 };
  46
  47 /** @brief The current selection tree */
  48 GtkTreeStore *choose_store;
  49
  50 /** @brief The view onto the selection tree */
  51 GtkWidget *choose_view;
  52
  53 /** @brief The selection tree's selection */
  54 GtkTreeSelection *choose_selection;
  55
  56 /** @brief Count of file listing operations in flight */
  57 static int choose_list_in_flight;
  58
  59 /** @brief If nonzero autocollapse column won't be set */
  60 static int choose_suppress_set_autocollapse;
  61
  62 static char *choose_get_string(GtkTreeIter *iter, int column) {
  63   gchar *gs;
  64   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  65                      column, &gs,
  66                      -1);
  67   char *s = xstrdup(gs);
  68   g_free(gs);
  69   return s;
  70 }
  71
  72 char *choose_get_track(GtkTreeIter *iter) {
  73   char *s = choose_get_string(iter, TRACK_COLUMN);
  74   return *s ? s : 0;                    /* Placeholder -> NULL */
  75 }
  76
  77 char *choose_get_sort(GtkTreeIter *iter) {
  78   return choose_get_string(iter, SORT_COLUMN);
  79 }
  80
  81 char *choose_get_display(GtkTreeIter *iter) {
  82   return choose_get_string(iter, NAME_COLUMN);
  83 }
  84
  85 int choose_is_file(GtkTreeIter *iter) {
  86   gboolean isfile;
  87   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  88                      ISFILE_COLUMN, &isfile,
  89                      -1);
  90   return isfile;
  91 }
  92
  93 int choose_is_dir(GtkTreeIter *iter) {
  94   gboolean isfile;
  95   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  96                      ISFILE_COLUMN, &isfile,
  97                      -1);
  98   if(isfile)
  99     return FALSE;
 100   return !choose_is_placeholder(iter);
 101 }
 102
 103 int choose_is_placeholder(GtkTreeIter *iter) {
 104   return choose_get_string(iter, TRACK_COLUMN)[0] == 0;
 105 }
 106
 107 int choose_can_autocollapse(GtkTreeIter *iter) {
 108   gboolean autocollapse;
 109   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
 110                      AUTOCOLLAPSE_COLUMN, &autocollapse,
 111                      -1);
 112   return autocollapse;
 113 }
 114
 115 /** @brief Remove node @p it and all its children
 116  * @param it Iterator, updated to point to next
 117  * @return True if iterator remains valid
 118  *
 119  * TODO is this necessary?  gtk_tree_store_remove() does not document what
 120  * happens to children.
 121  */
 122 static gboolean choose_remove_node(GtkTreeIter *it) {
 123   GtkTreeIter child[1];
 124   gboolean childv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
 125                                                  child,
 126                                                  it);
 127   while(childv)
 128     childv = choose_remove_node(child);
 129   return gtk_tree_store_remove(choose_store, it);
 130 }
 131
 132 /** @brief Update length and state fields */
 133 static gboolean choose_set_state_callback(GtkTreeModel attribute((unused)) *model,
 134                                           GtkTreePath attribute((unused)) *path,
 135                                           GtkTreeIter *it,
 136                                           gpointer attribute((unused)) data) {
 137   if(choose_is_file(it)) {
 138     const char *track = choose_get_track(it);
 139     const long l = namepart_length(track);
 140     char length[64];
 141     if(l > 0)
 142       byte_snprintf(length, sizeof length, "%ld:%02ld", l / 60, l % 60);
 143     else
 144       length[0] = 0;
 145     gtk_tree_store_set(choose_store, it,
 146                        LENGTH_COLUMN, length,
 147                        STATE_COLUMN, queued(track),
 148                        -1);
 149     if(choose_is_search_result(track))
 150       gtk_tree_store_set(choose_store, it,
 151                          BG_COLUMN, SEARCH_RESULT_BG,
 152                          FG_COLUMN, SEARCH_RESULT_FG,
 153                          -1);
 154     else
 155       gtk_tree_store_set(choose_store, it,
 156                          BG_COLUMN, (char *)0,
 157                          FG_COLUMN, (char *)0,
 158                          -1);
 159   }
 160   return FALSE;                         /* continue walking */
 161 }
 162
 163 /** @brief Called when the queue or playing track change */
 164 static void choose_set_state(const char attribute((unused)) *event,
 165                              void attribute((unused)) *eventdata,
 166                              void attribute((unused)) *callbackdata) {
 167   gtk_tree_model_foreach(GTK_TREE_MODEL(choose_store),
 168                          choose_set_state_callback,
 169                          NULL);
 170 }
 171
 172 /** @brief (Re-)populate a node
 173  * @param parent_ref Node to populate or NULL to fill root
 174  * @param nvec Number of children to add
 175  * @param vec Children
 176  * @param isfile 1 if children are files, 0 if directories
 177  *
 178  * Adjusts the set of files (or directories) below @p parent_ref to match those
 179  * listed in @p nvec and @p vec.
 180  *
 181  * @p parent_ref will be destroyed.
 182  */
 183 static void choose_populate(GtkTreeRowReference *parent_ref,
 184                             int nvec, char **vec,
 185                             int isfile) {
 186   const char *type = isfile ? "track" : "dir";
 187   //fprintf(stderr, "%d new children of type %s\n", nvec, type);
 188   if(!nvec)
 189     goto skip;
 190   /* Compute parent_* */
 191   GtkTreeIter pit[1], *parent_it;
 192   GtkTreePath *parent_path;
 193   if(parent_ref) {
 194     parent_path = gtk_tree_row_reference_get_path(parent_ref);
 195     parent_it = pit;
 196     gboolean pitv = gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store),
 197                                             pit, parent_path);
 198     assert(pitv);
 199     /*fprintf(stderr, "choose_populate %s: parent path is [%s]\n",
 200             type,
 201             gtk_tree_path_to_string(parent_path));*/
 202   } else {
 203     parent_path = 0;
 204     parent_it = 0;
 205     /*fprintf(stderr, "choose_populate %s: populating the root\n",
 206             type);*/
 207   }
 208   /* Both td[] and the current node set are sorted so we can do a single linear
 209    * pass to insert new nodes and remove unwanted ones.  The total performance
 210    * may be worse than linear depending on the performance of GTK+'s insert and
 211    * delete operations. */
 212   //fprintf(stderr, "sorting tracks\n");
 213   struct tracksort_data *td = tracksort_init(nvec, vec, type);
 214   GtkTreeIter it[1];
 215   gboolean itv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
 216                                               it,
 217                                               parent_it);
 218   int inserted = 0, deleted_placeholder = 0;
 219   //fprintf(stderr, "inserting tracks type=%s\n", type);
 220   while(nvec > 0 || itv) {
 221     /*fprintf(stderr, "td[] = %s, it=%s [%s]\n",
 222             nvec > 0 ? td->track : "(none)",
 223             itv ? choose_get_track(it) : "(!itv)",
 224             itv ? (choose_is_file(it) ? "file" : "dir") : "");*/
 225     enum { INSERT, DELETE, SKIP_TREE, SKIP_BOTH } action;
 226     const char *track = itv ? choose_get_track(it) : 0;
 227     if(itv && !track) {
 228       //fprintf(stderr, " placeholder\n");
 229       action = DELETE;
 230       ++deleted_placeholder;
 231     } else if(nvec > 0 && itv) {
 232       /* There's both a tree row and a td[] entry */
 233       const int cmp = compare_tracks(td->sort, choose_get_sort(it),
 234                                      td->display, choose_get_display(it),
 235                                      td->track, track);
 236       //fprintf(stderr, " cmp=%d\n", cmp);
 237       if(cmp < 0)
 238         /* td < it, so we insert td before it */
 239         action = INSERT;
 240       else if(cmp > 0) {
 241         /* td > it, so we must either delete it (if the same type) or skip it */
 242         if(choose_is_file(it) == isfile)
 243           action = DELETE;
 244         else
 245           action = SKIP_TREE;
 246       } else
 247         /* td = it, so we step past both */
 248         action = SKIP_BOTH;
 249     } else if(nvec > 0) {
 250       /* We've reached the end of the tree rows, but new have tracks left in
 251        * td[] */
 252       //fprintf(stderr, " inserting\n");
 253       action = INSERT;
 254     } else {
 255       /* We've reached the end of the new tracks from td[], but there are
 256        * further tracks in the tree */
 257       //fprintf(stderr, " deleting\n");
 258       if(choose_is_file(it) == isfile)
 259         action = DELETE;
 260       else
 261         action = SKIP_TREE;
 262     }
 263
 264     switch(action) {
 265     case INSERT: {
 266       //fprintf(stderr, " INSERT %s\n", td->track);
 267       /* Insert a new row from td[] before it, or at the end if it is no longer
 268        * valid */
 269       GtkTreeIter child[1];
 270       gtk_tree_store_insert_before(choose_store,
 271                                    child, /* new row */
 272                                    parent_it, /* parent */
 273                                    itv ? it : NULL); /* successor */
 274       gtk_tree_store_set(choose_store, child,
 275                          NAME_COLUMN, td->display,
 276                          ISFILE_COLUMN, isfile,
 277                          TRACK_COLUMN, td->track,
 278                          SORT_COLUMN, td->sort,
 279                          AUTOCOLLAPSE_COLUMN, FALSE,
 280                          -1);
 281       /* Update length and state; we expect this to kick off length lookups
 282        * rather than necessarily get the right value the first time round. */
 283       choose_set_state_callback(0, 0, child, 0);
 284       /* If we inserted a directory, insert a placeholder too, so it appears to
 285        * have children; it will be deleted when we expand the directory. */
 286       if(!isfile) {
 287         //fprintf(stderr, "  inserting a placeholder\n");
 288         GtkTreeIter placeholder[1];
 289
 290         gtk_tree_store_append(choose_store, placeholder, child);
 291         gtk_tree_store_set(choose_store, placeholder,
 292                            NAME_COLUMN, "Waddling...",
 293                            TRACK_COLUMN, "",
 294                            ISFILE_COLUMN, FALSE,
 295                            -1);
 296       }
 297       ++inserted;
 298       ++td;
 299       --nvec;
 300       break;
 301     }
 302     case SKIP_BOTH:
 303       //fprintf(stderr, " SKIP_BOTH\n");
 304       ++td;
 305       --nvec;
 306       /* fall thru */
 307     case SKIP_TREE:
 308       //fprintf(stderr, " SKIP_TREE\n");
 309       itv = gtk_tree_model_iter_next(GTK_TREE_MODEL(choose_store), it);
 310       break;
 311     case DELETE:
 312       //fprintf(stderr, " DELETE\n");
 313       itv = choose_remove_node(it);
 314       break;
 315     }
 316   }
 317   /*fprintf(stderr, "inserted=%d deleted_placeholder=%d\n\n",
 318           inserted, deleted_placeholder);*/
 319   if(parent_ref) {
 320     /* If we deleted a placeholder then we must re-expand the row */
 321     if(deleted_placeholder) {
 322       ++choose_suppress_set_autocollapse;
 323       gtk_tree_view_expand_row(GTK_TREE_VIEW(choose_view), parent_path, FALSE);
 324       --choose_suppress_set_autocollapse;
 325     }
 326     gtk_tree_row_reference_free(parent_ref);
 327     gtk_tree_path_free(parent_path);
 328   }
 329 skip:
 330   /* We only notify others that we've inserted tracks when there are no more
 331    * insertions pending, so that they don't have to keep track of how many
 332    * requests they've made.  */
 333   if(--choose_list_in_flight == 0) {
 334     /* Notify interested parties that we inserted some tracks, AFTER making
 335      * sure that the row is properly expanded */
 336     //fprintf(stderr, "raising choose-more-tracks\n");
 337     event_raise("choose-more-tracks", 0);
 338   }
 339   //fprintf(stderr, "choose_list_in_flight -> %d-\n", choose_list_in_flight);
 340 }
 341
 342 static void choose_dirs_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, 0/*!isfile*/);
 350 }
 351
 352 static void choose_files_completed(void *v,
 353                                    const char *err,
 354                                    int nvec, char **vec) {
 355   if(err) {
 356     popup_protocol_error(0, err);
 357     return;
 358   }
 359   choose_populate(v, nvec, vec, 1/*isfile*/);
 360 }
 361
 362 void choose_play_completed(void attribute((unused)) *v,
 363                            const char *err) {
 364   if(err)
 365     popup_protocol_error(0, err);
 366 }
 367
 368 static void choose_state_toggled
 369     (GtkCellRendererToggle attribute((unused)) *cell_renderer,
 370      gchar *path_str,
 371      gpointer attribute((unused)) user_data) {
 372   GtkTreeIter it[1];
 373   /* Identify the track */
 374   gboolean itv =
 375     gtk_tree_model_get_iter_from_string(GTK_TREE_MODEL(choose_store),
 376                                         it,
 377                                         path_str);
 378   if(!itv)
 379     return;
 380   if(!choose_is_file(it))
 381     return;
 382   const char *track = choose_get_track(it);
 383   if(queued(track))
 384     return;
 385   disorder_eclient_play(client, track, choose_play_completed, 0);
 386
 387 }
 388
 389 /** @brief (Re-)get the children of @p path
 390  * @param path Path to target row
 391  * @param iter Iterator pointing at target row
 392  *
 393  * Called from choose_row_expanded() to make sure that the contents are present
 394  * and from choose_refill_callback() to (re-)synchronize.
 395  */
 396 static void choose_refill_row(GtkTreePath *path,
 397                               GtkTreeIter *iter) {
 398   const char *track = choose_get_track(iter);
 399   disorder_eclient_files(client, choose_files_completed,
 400                          track,
 401                          NULL,
 402                          gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
 403                                                     path));
 404   disorder_eclient_dirs(client, choose_dirs_completed,
 405                         track,
 406                         NULL,
 407                         gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
 408                                                    path));
 409   /* The row references are destroyed in the _completed handlers. */
 410   choose_list_in_flight += 2;
 411 }
 412
 413 static void choose_row_expanded(GtkTreeView attribute((unused)) *treeview,
 414                                 GtkTreeIter *iter,
 415                                 GtkTreePath *path,
 416                                 gpointer attribute((unused)) user_data) {
 417   /*fprintf(stderr, "row-expanded path=[%s]\n\n",
 418           gtk_tree_path_to_string(path));*/
 419   /* We update a node's contents whenever it is expanded, even if it was
 420    * already populated; the effect is that contracting and expanding a node
 421    * suffices to update it to the latest state on the server. */
 422   choose_refill_row(path, iter);
 423   if(!choose_suppress_set_autocollapse) {
 424     if(choose_auto_expanding) {
 425       /* This was an automatic expansion; mark it the row for auto-collapse. */
 426       gtk_tree_store_set(choose_store, iter,
 427                          AUTOCOLLAPSE_COLUMN, TRUE,
 428                          -1);
 429       /*fprintf(stderr, "enable auto-collapse for %s\n",
 430               gtk_tree_path_to_string(path));*/
 431     } else {
 432       /* This was a manual expansion.  Inhibit automatic collapse on this row
 433        * and all its ancestors.  */
 434       gboolean itv;
 435       do {
 436         gtk_tree_store_set(choose_store, iter,
 437                            AUTOCOLLAPSE_COLUMN, FALSE,
 438                            -1);
 439         /*fprintf(stderr, "suppress auto-collapse for %s\n",
 440                 gtk_tree_model_get_string_from_iter(GTK_TREE_MODEL(choose_store),
 441                                                     iter));*/
 442         GtkTreeIter child = *iter;
 443         itv = gtk_tree_model_iter_parent(GTK_TREE_MODEL(choose_store),
 444                                          iter,
 445                                          &child);
 446       } while(itv);
 447       /* The effect of this is that if you expand a row that's actually a
 448        * sibling of the real target of the auto-expansion, it stays expanded
 449        * when you clear a search.  That's find and good, but it _still_ stays
 450        * expanded if you expand it and then collapse it.
 451        *
 452        * An alternative policy would be to only auto-collapse rows that don't
 453        * have any expanded children (apart from ones also subject to
 454        * auto-collapse).  I'm not sure what the most usable policy is.
 455        */
 456     }
 457   }
 458 }
 459
 460 static void choose_auto_collapse_callback(GtkTreeView *tree_view,
 461                                           GtkTreePath *path,
 462                                           gpointer attribute((unused)) user_data) {
 463   GtkTreeIter it[1];
 464
 465   gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), it, path);
 466   if(choose_can_autocollapse(it)) {
 467     /*fprintf(stderr, "collapse %s\n",
 468             gtk_tree_path_to_string(path));*/
 469     gtk_tree_store_set(choose_store, it,
 470                        AUTOCOLLAPSE_COLUMN, FALSE,
 471                        -1);
 472     gtk_tree_view_collapse_row(tree_view, path);
 473   }
 474 }
 475
 476 /** @brief Perform automatic collapse after a search is cleared */
 477 void choose_auto_collapse(void) {
 478   gtk_tree_view_map_expanded_rows(GTK_TREE_VIEW(choose_view),
 479                                   choose_auto_collapse_callback,
 480                                   0);
 481 }
 482
 483 /** @brief Called from choose_refill() with each expanded row */
 484 static void choose_refill_callback(GtkTreeView attribute((unused)) *tree_view,
 485                                    GtkTreePath *path,
 486                                    gpointer attribute((unused)) user_data) {
 487   GtkTreeIter it[1];
 488
 489   gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), it, path);
 490   choose_refill_row(path, it);
 491 }
 492
 493 /** @brief Synchronize all visible data with the server
 494  *
 495  * Called at startup, when a rescan completes, and via periodic_slow().
 496  */
 497 static void choose_refill(const char attribute((unused)) *event,
 498                           void attribute((unused)) *eventdata,
 499                           void attribute((unused)) *callbackdata) {
 500   //fprintf(stderr, "choose_refill\n");
 501   /* Update the root */
 502   disorder_eclient_files(client, choose_files_completed, "", NULL, NULL);
 503   disorder_eclient_dirs(client, choose_dirs_completed, "", NULL, NULL);
 504   choose_list_in_flight += 2;
 505   /* Update all expanded rows */
 506   gtk_tree_view_map_expanded_rows(GTK_TREE_VIEW(choose_view),
 507                                   choose_refill_callback,
 508                                   0);
 509   //fprintf(stderr, "choose_list_in_flight -> %d+\n", choose_list_in_flight);
 510 }
 511
 512 /** @brief Called for key-*-event on the main view
 513  */
 514 static gboolean choose_key_event(GtkWidget attribute((unused)) *widget,
 515                                  GdkEventKey *event,
 516                                  gpointer user_data) {
 517   /*fprintf(stderr, "choose_key_event type=%d state=%#x keyval=%#x\n",
 518           event->type, event->state, event->keyval);*/
 519   switch(event->keyval) {
 520   case GDK_Page_Up:
 521   case GDK_Page_Down:
 522   case GDK_Up:
 523   case GDK_Down:
 524   case GDK_Home:
 525   case GDK_End:
 526     return FALSE;                       /* We'll take these */
 527   case 'f': case 'F':
 528     /* ^F is expected to start a search.  We implement this by focusing the
 529      * search entry box. */
 530     if((event->state & ~(GDK_LOCK_MASK|GDK_SHIFT_MASK)) == GDK_CONTROL_MASK
 531        && event->type == GDK_KEY_PRESS) {
 532       choose_search_new();
 533       return TRUE;                      /* Handled it */
 534     }
 535     break;
 536   case 'g': case 'G':
 537     /* ^G is expected to go the next match.  We simulate a click on the 'next'
 538      * button. */
 539     if((event->state & ~(GDK_LOCK_MASK|GDK_SHIFT_MASK)) == GDK_CONTROL_MASK
 540        && event->type == GDK_KEY_PRESS) {
 541       choose_next_clicked(0, 0);
 542       return TRUE;                      /* Handled it */
 543     }
 544     break;
 545   }
 546   /* Anything not handled we redirected to the search entry field */
 547   gtk_widget_event(user_data, (GdkEvent *)event);
 548   return TRUE;                          /* Handled it */
 549 }
 550
 551 static gboolean choose_multidrag_predicate(GtkTreePath attribute((unused)) *path,
 552                                            GtkTreeIter *iter) {
 553   return choose_is_file(iter);
 554 }
 555
 556
 557 /** @brief Callback to add selected tracks to the selection data
 558  *
 559  * Called from choose_drag_data_get().
 560  */
 561 static void choose_drag_data_get_collect(GtkTreeModel attribute((unused)) *model,
 562                                          GtkTreePath attribute((unused)) *path,
 563                                          GtkTreeIter *iter,
 564                                          gpointer data) {
 565   struct dynstr *const result = data;
 566
 567   if(choose_is_file(iter)) {            /* no diretories */
 568     dynstr_append_string(result, "");   /* no ID */
 569     dynstr_append(result, '\n');
 570     dynstr_append_string(result, choose_get_track(iter));
 571     dynstr_append(result, '\n');
 572   }
 573 }
 574
 575 /** @brief Called to extract the dragged data from the choose view
 576  * @param w Source widget (the tree view)
 577  * @param dc Drag context
 578  * @param data Where to put the answer
 579  * @param info_ Target @c info parameter
 580  * @param time_ Time data requested (for some reason not a @c time_t)
 581  * @param user_data The queuelike
 582  *
 583  * Closely analogous to ql_drag_data_get(), and uses the same data format.
 584  * IDs are sent as empty strings.
 585  */
 586 static void choose_drag_data_get(GtkWidget *w,
 587                                  GdkDragContext attribute((unused)) *dc,
 588                                  GtkSelectionData *data,
 589                                  guint attribute((unused)) info_,
 590                                  guint attribute((unused)) time_,
 591                                  gpointer attribute((unused)) user_data) {
 592   struct dynstr result[1];
 593   GtkTreeSelection *sel;
 594
 595   sel = gtk_tree_view_get_selection(GTK_TREE_VIEW(w));
 596   dynstr_init(result);
 597   gtk_tree_selection_selected_foreach(sel,
 598                                       choose_drag_data_get_collect,
 599                                       result);
 600   gtk_selection_data_set(data,
 601                          GDK_TARGET_STRING,
 602                          8, (guchar *)result->vec, result->nvec);
 603 }
 604
 605 /** @brief Create the choose tab */
 606 GtkWidget *choose_widget(void) {
 607   /* Create the tree store. */
 608   choose_store = gtk_tree_store_new(CHOOSE_COLUMNS,
 609                                     G_TYPE_BOOLEAN,
 610                                     G_TYPE_STRING,
 611                                     G_TYPE_STRING,
 612                                     G_TYPE_BOOLEAN,
 613                                     G_TYPE_STRING,
 614                                     G_TYPE_STRING,
 615                                     G_TYPE_STRING,
 616                                     G_TYPE_STRING,
 617                                     G_TYPE_BOOLEAN);
 618
 619   /* Create the view */
 620   choose_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(choose_store));
 621   gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(choose_view), TRUE);
 622   /* Suppress built-in typeahead find, we do our own search support. */
 623   gtk_tree_view_set_enable_search(GTK_TREE_VIEW(choose_view), FALSE);
 624
 625   /* Create cell renderers and columns */
 626   /* TODO use a table */
 627   {
 628     GtkCellRenderer *r = gtk_cell_renderer_toggle_new();
 629     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 630       ("Queued",
 631        r,
 632        "active", STATE_COLUMN,
 633        "visible", ISFILE_COLUMN,
 634        (char *)0);
 635     gtk_tree_view_column_set_resizable(c, TRUE);
 636     gtk_tree_view_column_set_reorderable(c, TRUE);
 637     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 638     g_signal_connect(r, "toggled",
 639                      G_CALLBACK(choose_state_toggled), 0);
 640   }
 641   {
 642     GtkCellRenderer *r = gtk_cell_renderer_text_new();
 643     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 644       ("Length",
 645        r,
 646        "text", LENGTH_COLUMN,
 647        (char *)0);
 648     gtk_tree_view_column_set_resizable(c, TRUE);
 649     gtk_tree_view_column_set_reorderable(c, TRUE);
 650     g_object_set(r, "xalign", (gfloat)1.0, (char *)0);
 651     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 652   }
 653   {
 654     GtkCellRenderer *r = gtk_cell_renderer_text_new();
 655     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 656       ("Track",
 657        r,
 658        "text", NAME_COLUMN,
 659        "background", BG_COLUMN,
 660        "foreground", FG_COLUMN,
 661        (char *)0);
 662     gtk_tree_view_column_set_resizable(c, TRUE);
 663     gtk_tree_view_column_set_reorderable(c, TRUE);
 664     g_object_set(c, "expand", TRUE, (char *)0);
 665     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 666     gtk_tree_view_set_expander_column(GTK_TREE_VIEW(choose_view), c);
 667   }
 668
 669   /* The selection should support multiple things being selected */
 670   choose_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(choose_view));
 671   gtk_tree_selection_set_mode(choose_selection, GTK_SELECTION_MULTIPLE);
 672
 673   /* Catch button presses */
 674   g_signal_connect(choose_view, "button-press-event",
 675                    G_CALLBACK(choose_button_event), 0);
 676   g_signal_connect(choose_view, "button-release-event",
 677                    G_CALLBACK(choose_button_event), 0);
 678   /* Catch row expansions so we can fill in placeholders */
 679   g_signal_connect(choose_view, "row-expanded",
 680                    G_CALLBACK(choose_row_expanded), 0);
 681
 682   event_register("queue-list-changed", choose_set_state, 0);
 683   event_register("playing-track-changed", choose_set_state, 0);
 684   event_register("search-results-changed", choose_set_state, 0);
 685   event_register("lookups-completed", choose_set_state, 0);
 686   event_register("choose-more-tracks", choose_menu_moretracks, 0);
 687
 688   /* After a rescan we update the choose tree.  We get a rescan-complete
 689    * automatically at startup and upon connection too. */
 690   event_register("rescan-complete", choose_refill, 0);
 691
 692   /* Make the widget scrollable */
 693   GtkWidget *scrolled = scroll_widget(choose_view);
 694
 695   /* Pack vertically with the search widget */
 696   GtkWidget *vbox = gtk_vbox_new(FALSE/*homogenous*/, 1/*spacing*/);
 697   gtk_box_pack_start(GTK_BOX(vbox), scrolled,
 698                      TRUE/*expand*/, TRUE/*fill*/, 0/*padding*/);
 699   gtk_box_pack_end(GTK_BOX(vbox), choose_search_widget(),
 700                    FALSE/*expand*/, FALSE/*fill*/, 0/*padding*/);
 701
 702   g_object_set_data(G_OBJECT(vbox), "type", (void *)&choose_tabtype);
 703
 704   /* Redirect keyboard activity to the search widget */
 705   g_signal_connect(choose_view, "key-press-event",
 706                    G_CALLBACK(choose_key_event), choose_search_entry);
 707   g_signal_connect(choose_view, "key-release-event",
 708                    G_CALLBACK(choose_key_event), choose_search_entry);
 709
 710   /* Enable dragging of tracks out */
 711   gtk_drag_source_set(choose_view,
 712                       GDK_BUTTON1_MASK,
 713                       choose_targets,
 714                       sizeof choose_targets / sizeof *choose_targets,
 715                       GDK_ACTION_COPY);
 716   g_signal_connect(choose_view, "drag-data-get",
 717                    G_CALLBACK(choose_drag_data_get), NULL);
 718   make_treeview_multidrag(choose_view,
 719                           choose_multidrag_predicate);
 720
 721   return vbox;
 722 }
 723
 724 /*
 725 Local Variables:
 726 c-basic-offset:2
 727 comment-column:40
 728 fill-column:79
 729 indent-tabs-mode:nil
 730 End:
 731 */