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 "queue-generic.h"
  37 #include <gdk/gdkkeysyms.h>
  38
  39 /** @brief Drag types */
  40 const GtkTargetEntry choose_targets[] = {
  41   {
  42     PLAYABLE_TRACKS,                             /* drag type */
  43     GTK_TARGET_SAME_APP|GTK_TARGET_OTHER_WIDGET, /* copying between widgets */
  44     PLAYABLE_TRACKS_ID                           /* ID value */
  45   },
  46   {
  47     .target = NULL
  48   }
  49 };
  50
  51 /** @brief The current selection tree */
  52 GtkTreeStore *choose_store;
  53
  54 /** @brief The view onto the selection tree */
  55 GtkWidget *choose_view;
  56
  57 /** @brief The selection tree's selection */
  58 GtkTreeSelection *choose_selection;
  59
  60 /** @brief Count of file listing operations in flight */
  61 static int choose_list_in_flight;
  62
  63 /** @brief If nonzero autocollapse column won't be set */
  64 static int choose_suppress_set_autocollapse;
  65
  66 static char *choose_get_string(GtkTreeIter *iter, int column) {
  67   gchar *gs;
  68   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  69                      column, &gs,
  70                      -1);
  71   char *s = xstrdup(gs);
  72   g_free(gs);
  73   return s;
  74 }
  75
  76 char *choose_get_track(GtkTreeIter *iter) {
  77   char *s = choose_get_string(iter, TRACK_COLUMN);
  78   return *s ? s : 0;                    /* Placeholder -> NULL */
  79 }
  80
  81 char *choose_get_sort(GtkTreeIter *iter) {
  82   return choose_get_string(iter, SORT_COLUMN);
  83 }
  84
  85 char *choose_get_display(GtkTreeIter *iter) {
  86   return choose_get_string(iter, NAME_COLUMN);
  87 }
  88
  89 int choose_is_file(GtkTreeIter *iter) {
  90   gboolean isfile;
  91   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
  92                      ISFILE_COLUMN, &isfile,
  93                      -1);
  94   return isfile;
  95 }
  96
  97 int choose_is_dir(GtkTreeIter *iter) {
  98   gboolean isfile;
  99   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
 100                      ISFILE_COLUMN, &isfile,
 101                      -1);
 102   if(isfile)
 103     return FALSE;
 104   return !choose_is_placeholder(iter);
 105 }
 106
 107 int choose_is_placeholder(GtkTreeIter *iter) {
 108   return choose_get_string(iter, TRACK_COLUMN)[0] == 0;
 109 }
 110
 111 int choose_can_autocollapse(GtkTreeIter *iter) {
 112   gboolean autocollapse;
 113   gtk_tree_model_get(GTK_TREE_MODEL(choose_store), iter,
 114                      AUTOCOLLAPSE_COLUMN, &autocollapse,
 115                      -1);
 116   return autocollapse;
 117 }
 118
 119 /** @brief Remove node @p it and all its children
 120  * @param it Iterator, updated to point to next
 121  * @return True if iterator remains valid
 122  *
 123  * TODO is this necessary?  gtk_tree_store_remove() does not document what
 124  * happens to children.
 125  */
 126 static gboolean choose_remove_node(GtkTreeIter *it) {
 127   GtkTreeIter child[1];
 128   gboolean childv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
 129                                                  child,
 130                                                  it);
 131   while(childv)
 132     childv = choose_remove_node(child);
 133   return gtk_tree_store_remove(choose_store, it);
 134 }
 135
 136 /** @brief Update length and state fields */
 137 static gboolean choose_set_state_callback(GtkTreeModel attribute((unused)) *model,
 138                                           GtkTreePath attribute((unused)) *path,
 139                                           GtkTreeIter *it,
 140                                           gpointer attribute((unused)) data) {
 141   if(choose_is_file(it)) {
 142     const char *track = choose_get_track(it);
 143     const long l = namepart_length(track);
 144     char length[64];
 145     if(l > 0)
 146       byte_snprintf(length, sizeof length, "%ld:%02ld", l / 60, l % 60);
 147     else
 148       length[0] = 0;
 149     gtk_tree_store_set(choose_store, it,
 150                        LENGTH_COLUMN, length,
 151                        STATE_COLUMN, queued(track),
 152                        -1);
 153     if(choose_is_search_result(track))
 154       gtk_tree_store_set(choose_store, it,
 155                          BG_COLUMN, SEARCH_RESULT_BG,
 156                          FG_COLUMN, SEARCH_RESULT_FG,
 157                          -1);
 158     else
 159       gtk_tree_store_set(choose_store, it,
 160                          BG_COLUMN, (char *)0,
 161                          FG_COLUMN, (char *)0,
 162                          -1);
 163   }
 164   return FALSE;                         /* continue walking */
 165 }
 166
 167 /** @brief Called when the queue or playing track change */
 168 static void choose_set_state(const char attribute((unused)) *event,
 169                              void attribute((unused)) *eventdata,
 170                              void attribute((unused)) *callbackdata) {
 171   gtk_tree_model_foreach(GTK_TREE_MODEL(choose_store),
 172                          choose_set_state_callback,
 173                          NULL);
 174 }
 175
 176 /** @brief (Re-)populate a node
 177  * @param parent_ref Node to populate or NULL to fill root
 178  * @param nvec Number of children to add
 179  * @param vec Children
 180  * @param isfile 1 if children are files, 0 if directories
 181  *
 182  * Adjusts the set of files (or directories) below @p parent_ref to match those
 183  * listed in @p nvec and @p vec.
 184  *
 185  * @p parent_ref will be destroyed.
 186  */
 187 static void choose_populate(GtkTreeRowReference *parent_ref,
 188                             int nvec, char **vec,
 189                             int isfile) {
 190   const char *type = isfile ? "track" : "dir";
 191   //fprintf(stderr, "%d new children of type %s\n", nvec, type);
 192   if(!nvec)
 193     goto skip;
 194   /* Compute parent_* */
 195   GtkTreeIter pit[1], *parent_it;
 196   GtkTreePath *parent_path;
 197   if(parent_ref) {
 198     parent_path = gtk_tree_row_reference_get_path(parent_ref);
 199     parent_it = pit;
 200     gboolean pitv = gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store),
 201                                             pit, parent_path);
 202     assert(pitv);
 203     /*fprintf(stderr, "choose_populate %s: parent path is [%s]\n",
 204             type,
 205             gtk_tree_path_to_string(parent_path));*/
 206   } else {
 207     parent_path = 0;
 208     parent_it = 0;
 209     /*fprintf(stderr, "choose_populate %s: populating the root\n",
 210             type);*/
 211   }
 212   /* Both td[] and the current node set are sorted so we can do a single linear
 213    * pass to insert new nodes and remove unwanted ones.  The total performance
 214    * may be worse than linear depending on the performance of GTK+'s insert and
 215    * delete operations. */
 216   //fprintf(stderr, "sorting tracks\n");
 217   struct tracksort_data *td = tracksort_init(nvec, vec, type);
 218   GtkTreeIter it[1];
 219   gboolean itv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
 220                                               it,
 221                                               parent_it);
 222   int inserted = 0, deleted_placeholder = 0;
 223   //fprintf(stderr, "inserting tracks type=%s\n", type);
 224   while(nvec > 0 || itv) {
 225     /*fprintf(stderr, "td[] = %s, it=%s [%s]\n",
 226             nvec > 0 ? td->track : "(none)",
 227             itv ? choose_get_track(it) : "(!itv)",
 228             itv ? (choose_is_file(it) ? "file" : "dir") : "");*/
 229     enum { INSERT, DELETE, SKIP_TREE, SKIP_BOTH } action;
 230     const char *track = itv ? choose_get_track(it) : 0;
 231     if(itv && !track) {
 232       //fprintf(stderr, " placeholder\n");
 233       action = DELETE;
 234       ++deleted_placeholder;
 235     } else if(nvec > 0 && itv) {
 236       /* There's both a tree row and a td[] entry */
 237       const int cmp = compare_tracks(td->sort, choose_get_sort(it),
 238                                      td->display, choose_get_display(it),
 239                                      td->track, track);
 240       //fprintf(stderr, " cmp=%d\n", cmp);
 241       if(cmp < 0)
 242         /* td < it, so we insert td before it */
 243         action = INSERT;
 244       else if(cmp > 0) {
 245         /* td > it, so we must either delete it (if the same type) or skip it */
 246         if(choose_is_file(it) == isfile)
 247           action = DELETE;
 248         else
 249           action = SKIP_TREE;
 250       } else
 251         /* td = it, so we step past both */
 252         action = SKIP_BOTH;
 253     } else if(nvec > 0) {
 254       /* We've reached the end of the tree rows, but new have tracks left in
 255        * td[] */
 256       //fprintf(stderr, " inserting\n");
 257       action = INSERT;
 258     } else {
 259       /* We've reached the end of the new tracks from td[], but there are
 260        * further tracks in the tree */
 261       //fprintf(stderr, " deleting\n");
 262       if(choose_is_file(it) == isfile)
 263         action = DELETE;
 264       else
 265         action = SKIP_TREE;
 266     }
 267
 268     switch(action) {
 269     case INSERT: {
 270       //fprintf(stderr, " INSERT %s\n", td->track);
 271       /* Insert a new row from td[] before it, or at the end if it is no longer
 272        * valid */
 273       GtkTreeIter child[1];
 274       gtk_tree_store_insert_before(choose_store,
 275                                    child, /* new row */
 276                                    parent_it, /* parent */
 277                                    itv ? it : NULL); /* successor */
 278       gtk_tree_store_set(choose_store, child,
 279                          NAME_COLUMN, td->display,
 280                          ISFILE_COLUMN, isfile,
 281                          TRACK_COLUMN, td->track,
 282                          SORT_COLUMN, td->sort,
 283                          AUTOCOLLAPSE_COLUMN, FALSE,
 284                          -1);
 285       /* Update length and state; we expect this to kick off length lookups
 286        * rather than necessarily get the right value the first time round. */
 287       choose_set_state_callback(0, 0, child, 0);
 288       /* If we inserted a directory, insert a placeholder too, so it appears to
 289        * have children; it will be deleted when we expand the directory. */
 290       if(!isfile) {
 291         //fprintf(stderr, "  inserting a placeholder\n");
 292         GtkTreeIter placeholder[1];
 293
 294         gtk_tree_store_append(choose_store, placeholder, child);
 295         gtk_tree_store_set(choose_store, placeholder,
 296                            NAME_COLUMN, "Waddling...",
 297                            TRACK_COLUMN, "",
 298                            ISFILE_COLUMN, FALSE,
 299                            -1);
 300       }
 301       ++inserted;
 302       ++td;
 303       --nvec;
 304       break;
 305     }
 306     case SKIP_BOTH:
 307       //fprintf(stderr, " SKIP_BOTH\n");
 308       ++td;
 309       --nvec;
 310       /* fall thru */
 311     case SKIP_TREE:
 312       //fprintf(stderr, " SKIP_TREE\n");
 313       itv = gtk_tree_model_iter_next(GTK_TREE_MODEL(choose_store), it);
 314       break;
 315     case DELETE:
 316       //fprintf(stderr, " DELETE\n");
 317       itv = choose_remove_node(it);
 318       break;
 319     }
 320   }
 321   /*fprintf(stderr, "inserted=%d deleted_placeholder=%d\n\n",
 322           inserted, deleted_placeholder);*/
 323   if(parent_ref) {
 324     /* If we deleted a placeholder then we must re-expand the row */
 325     if(deleted_placeholder) {
 326       ++choose_suppress_set_autocollapse;
 327       gtk_tree_view_expand_row(GTK_TREE_VIEW(choose_view), parent_path, FALSE);
 328       --choose_suppress_set_autocollapse;
 329     }
 330     gtk_tree_row_reference_free(parent_ref);
 331     gtk_tree_path_free(parent_path);
 332   }
 333 skip:
 334   /* We only notify others that we've inserted tracks when there are no more
 335    * insertions pending, so that they don't have to keep track of how many
 336    * requests they've made.  */
 337   if(--choose_list_in_flight == 0) {
 338     /* Notify interested parties that we inserted some tracks, AFTER making
 339      * sure that the row is properly expanded */
 340     //fprintf(stderr, "raising choose-more-tracks\n");
 341     event_raise("choose-more-tracks", 0);
 342   }
 343   //fprintf(stderr, "choose_list_in_flight -> %d-\n", choose_list_in_flight);
 344 }
 345
 346 static void choose_dirs_completed(void *v,
 347                                   const char *err,
 348                                   int nvec, char **vec) {
 349   if(err) {
 350     popup_protocol_error(0, err);
 351     return;
 352   }
 353   choose_populate(v, nvec, vec, 0/*!isfile*/);
 354 }
 355
 356 static void choose_files_completed(void *v,
 357                                    const char *err,
 358                                    int nvec, char **vec) {
 359   if(err) {
 360     popup_protocol_error(0, err);
 361     return;
 362   }
 363   choose_populate(v, nvec, vec, 1/*isfile*/);
 364 }
 365
 366 void choose_play_completed(void attribute((unused)) *v,
 367                            const char *err) {
 368   if(err)
 369     popup_protocol_error(0, err);
 370 }
 371
 372 static void choose_state_toggled
 373     (GtkCellRendererToggle attribute((unused)) *cell_renderer,
 374      gchar *path_str,
 375      gpointer attribute((unused)) user_data) {
 376   GtkTreeIter it[1];
 377   /* Identify the track */
 378   gboolean itv =
 379     gtk_tree_model_get_iter_from_string(GTK_TREE_MODEL(choose_store),
 380                                         it,
 381                                         path_str);
 382   if(!itv)
 383     return;
 384   if(!choose_is_file(it))
 385     return;
 386   const char *track = choose_get_track(it);
 387   if(queued(track))
 388     return;
 389   disorder_eclient_play(client, track, choose_play_completed, 0);
 390
 391 }
 392
 393 /** @brief (Re-)get the children of @p path
 394  * @param path Path to target row
 395  * @param iter Iterator pointing at target row
 396  *
 397  * Called from choose_row_expanded() to make sure that the contents are present
 398  * and from choose_refill_callback() to (re-)synchronize.
 399  */
 400 static void choose_refill_row(GtkTreePath *path,
 401                               GtkTreeIter *iter) {
 402   const char *track = choose_get_track(iter);
 403   disorder_eclient_files(client, choose_files_completed,
 404                          track,
 405                          NULL,
 406                          gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
 407                                                     path));
 408   disorder_eclient_dirs(client, choose_dirs_completed,
 409                         track,
 410                         NULL,
 411                         gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
 412                                                    path));
 413   /* The row references are destroyed in the _completed handlers. */
 414   choose_list_in_flight += 2;
 415 }
 416
 417 static void choose_row_expanded(GtkTreeView attribute((unused)) *treeview,
 418                                 GtkTreeIter *iter,
 419                                 GtkTreePath *path,
 420                                 gpointer attribute((unused)) user_data) {
 421   /*fprintf(stderr, "row-expanded path=[%s]\n\n",
 422           gtk_tree_path_to_string(path));*/
 423   /* We update a node's contents whenever it is expanded, even if it was
 424    * already populated; the effect is that contracting and expanding a node
 425    * suffices to update it to the latest state on the server. */
 426   choose_refill_row(path, iter);
 427   if(!choose_suppress_set_autocollapse) {
 428     if(choose_auto_expanding) {
 429       /* This was an automatic expansion; mark it the row for auto-collapse. */
 430       gtk_tree_store_set(choose_store, iter,
 431                          AUTOCOLLAPSE_COLUMN, TRUE,
 432                          -1);
 433       /*fprintf(stderr, "enable auto-collapse for %s\n",
 434               gtk_tree_path_to_string(path));*/
 435     } else {
 436       /* This was a manual expansion.  Inhibit automatic collapse on this row
 437        * and all its ancestors.  */
 438       gboolean itv;
 439       do {
 440         gtk_tree_store_set(choose_store, iter,
 441                            AUTOCOLLAPSE_COLUMN, FALSE,
 442                            -1);
 443         /*fprintf(stderr, "suppress auto-collapse for %s\n",
 444                 gtk_tree_model_get_string_from_iter(GTK_TREE_MODEL(choose_store),
 445                                                     iter));*/
 446         GtkTreeIter child = *iter;
 447         itv = gtk_tree_model_iter_parent(GTK_TREE_MODEL(choose_store),
 448                                          iter,
 449                                          &child);
 450       } while(itv);
 451       /* The effect of this is that if you expand a row that's actually a
 452        * sibling of the real target of the auto-expansion, it stays expanded
 453        * when you clear a search.  That's find and good, but it _still_ stays
 454        * expanded if you expand it and then collapse it.
 455        *
 456        * An alternative policy would be to only auto-collapse rows that don't
 457        * have any expanded children (apart from ones also subject to
 458        * auto-collapse).  I'm not sure what the most usable policy is.
 459        */
 460     }
 461   }
 462 }
 463
 464 static void choose_auto_collapse_callback(GtkTreeView *tree_view,
 465                                           GtkTreePath *path,
 466                                           gpointer attribute((unused)) user_data) {
 467   GtkTreeIter it[1];
 468
 469   gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), it, path);
 470   if(choose_can_autocollapse(it)) {
 471     /*fprintf(stderr, "collapse %s\n",
 472             gtk_tree_path_to_string(path));*/
 473     gtk_tree_store_set(choose_store, it,
 474                        AUTOCOLLAPSE_COLUMN, FALSE,
 475                        -1);
 476     gtk_tree_view_collapse_row(tree_view, path);
 477   }
 478 }
 479
 480 /** @brief Perform automatic collapse after a search is cleared */
 481 void choose_auto_collapse(void) {
 482   gtk_tree_view_map_expanded_rows(GTK_TREE_VIEW(choose_view),
 483                                   choose_auto_collapse_callback,
 484                                   0);
 485 }
 486
 487 /** @brief Called from choose_refill() with each expanded row */
 488 static void choose_refill_callback(GtkTreeView attribute((unused)) *tree_view,
 489                                    GtkTreePath *path,
 490                                    gpointer attribute((unused)) user_data) {
 491   GtkTreeIter it[1];
 492
 493   gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), it, path);
 494   choose_refill_row(path, it);
 495 }
 496
 497 /** @brief Synchronize all visible data with the server
 498  *
 499  * Called at startup, when a rescan completes, and via periodic_slow().
 500  */
 501 static void choose_refill(const char attribute((unused)) *event,
 502                           void attribute((unused)) *eventdata,
 503                           void attribute((unused)) *callbackdata) {
 504   //fprintf(stderr, "choose_refill\n");
 505   /* Update the root */
 506   disorder_eclient_files(client, choose_files_completed, "", NULL, NULL);
 507   disorder_eclient_dirs(client, choose_dirs_completed, "", NULL, NULL);
 508   choose_list_in_flight += 2;
 509   /* Update all expanded rows */
 510   gtk_tree_view_map_expanded_rows(GTK_TREE_VIEW(choose_view),
 511                                   choose_refill_callback,
 512                                   0);
 513   //fprintf(stderr, "choose_list_in_flight -> %d+\n", choose_list_in_flight);
 514 }
 515
 516 /** @brief Called for key-*-event on the main view
 517  */
 518 static gboolean choose_key_event(GtkWidget attribute((unused)) *widget,
 519                                  GdkEventKey *event,
 520                                  gpointer user_data) {
 521   /*fprintf(stderr, "choose_key_event type=%d state=%#x keyval=%#x\n",
 522           event->type, event->state, event->keyval);*/
 523   switch(event->keyval) {
 524   case GDK_Page_Up:
 525   case GDK_Page_Down:
 526   case GDK_Up:
 527   case GDK_Down:
 528   case GDK_Home:
 529   case GDK_End:
 530     return FALSE;                       /* We'll take these */
 531   case 'f': case 'F':
 532     /* ^F is expected to start a search.  We implement this by focusing the
 533      * search entry box. */
 534     if((event->state & ~(GDK_LOCK_MASK|GDK_SHIFT_MASK)) == GDK_CONTROL_MASK
 535        && event->type == GDK_KEY_PRESS) {
 536       choose_search_new();
 537       return TRUE;                      /* Handled it */
 538     }
 539     break;
 540   case 'g': case 'G':
 541     /* ^G is expected to go the next match.  We simulate a click on the 'next'
 542      * button. */
 543     if((event->state & ~(GDK_LOCK_MASK|GDK_SHIFT_MASK)) == GDK_CONTROL_MASK
 544        && event->type == GDK_KEY_PRESS) {
 545       choose_next_clicked(0, 0);
 546       return TRUE;                      /* Handled it */
 547     }
 548     break;
 549   }
 550   /* Anything not handled we redirected to the search entry field */
 551   gtk_widget_event(user_data, (GdkEvent *)event);
 552   return TRUE;                          /* Handled it */
 553 }
 554
 555 static gboolean choose_multidrag_predicate(GtkTreePath attribute((unused)) *path,
 556                                            GtkTreeIter *iter) {
 557   return choose_is_file(iter);
 558 }
 559
 560
 561 /** @brief Callback to add selected tracks to the selection data
 562  *
 563  * Called from choose_drag_data_get().
 564  */
 565 static void choose_drag_data_get_collect(GtkTreeModel attribute((unused)) *model,
 566                                          GtkTreePath attribute((unused)) *path,
 567                                          GtkTreeIter *iter,
 568                                          gpointer data) {
 569   struct dynstr *const result = data;
 570
 571   if(choose_is_file(iter)) {            /* no diretories */
 572     dynstr_append_string(result, "");   /* no ID */
 573     dynstr_append(result, '\n');
 574     dynstr_append_string(result, choose_get_track(iter));
 575     dynstr_append(result, '\n');
 576   }
 577 }
 578
 579 /** @brief Called to extract the dragged data from the choose view
 580  * @param w Source widget (the tree view)
 581  * @param dc Drag context
 582  * @param data Where to put the answer
 583  * @param info_ Target @c info parameter
 584  * @param time_ Time data requested (for some reason not a @c time_t)
 585  * @param user_data The queuelike
 586  *
 587  * Closely analogous to ql_drag_data_get(), and uses the same data format.
 588  * IDs are sent as empty strings.
 589  */
 590 static void choose_drag_data_get(GtkWidget *w,
 591                                  GdkDragContext attribute((unused)) *dc,
 592                                  GtkSelectionData *data,
 593                                  guint attribute((unused)) info_,
 594                                  guint attribute((unused)) time_,
 595                                  gpointer attribute((unused)) user_data) {
 596   struct dynstr result[1];
 597   GtkTreeSelection *sel;
 598
 599   sel = gtk_tree_view_get_selection(GTK_TREE_VIEW(w));
 600   dynstr_init(result);
 601   gtk_tree_selection_selected_foreach(sel,
 602                                       choose_drag_data_get_collect,
 603                                       result);
 604   gtk_selection_data_set(data,
 605                          GDK_TARGET_STRING,
 606                          8, (guchar *)result->vec, result->nvec);
 607 }
 608
 609 /** @brief Create the choose tab */
 610 GtkWidget *choose_widget(void) {
 611   /* Create the tree store. */
 612   choose_store = gtk_tree_store_new(CHOOSE_COLUMNS,
 613                                     G_TYPE_BOOLEAN,
 614                                     G_TYPE_STRING,
 615                                     G_TYPE_STRING,
 616                                     G_TYPE_BOOLEAN,
 617                                     G_TYPE_STRING,
 618                                     G_TYPE_STRING,
 619                                     G_TYPE_STRING,
 620                                     G_TYPE_STRING,
 621                                     G_TYPE_BOOLEAN);
 622
 623   /* Create the view */
 624   choose_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(choose_store));
 625   gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(choose_view), TRUE);
 626   /* Suppress built-in typeahead find, we do our own search support. */
 627   gtk_tree_view_set_enable_search(GTK_TREE_VIEW(choose_view), FALSE);
 628
 629   /* Create cell renderers and columns */
 630   /* TODO use a table */
 631   {
 632     GtkCellRenderer *r = gtk_cell_renderer_toggle_new();
 633     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 634       ("Queued",
 635        r,
 636        "active", STATE_COLUMN,
 637        "visible", ISFILE_COLUMN,
 638        (char *)0);
 639     gtk_tree_view_column_set_resizable(c, TRUE);
 640     gtk_tree_view_column_set_reorderable(c, TRUE);
 641     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 642     g_signal_connect(r, "toggled",
 643                      G_CALLBACK(choose_state_toggled), 0);
 644   }
 645   {
 646     GtkCellRenderer *r = gtk_cell_renderer_text_new();
 647     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 648       ("Length",
 649        r,
 650        "text", LENGTH_COLUMN,
 651        (char *)0);
 652     gtk_tree_view_column_set_resizable(c, TRUE);
 653     gtk_tree_view_column_set_reorderable(c, TRUE);
 654     g_object_set(r, "xalign", (gfloat)1.0, (char *)0);
 655     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 656   }
 657   {
 658     GtkCellRenderer *r = gtk_cell_renderer_text_new();
 659     GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
 660       ("Track",
 661        r,
 662        "text", NAME_COLUMN,
 663        "background", BG_COLUMN,
 664        "foreground", FG_COLUMN,
 665        (char *)0);
 666     gtk_tree_view_column_set_resizable(c, TRUE);
 667     gtk_tree_view_column_set_reorderable(c, TRUE);
 668     g_object_set(c, "expand", TRUE, (char *)0);
 669     gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
 670     gtk_tree_view_set_expander_column(GTK_TREE_VIEW(choose_view), c);
 671   }
 672
 673   /* The selection should support multiple things being selected */
 674   choose_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(choose_view));
 675   gtk_tree_selection_set_mode(choose_selection, GTK_SELECTION_MULTIPLE);
 676
 677   /* Catch button presses */
 678   g_signal_connect(choose_view, "button-press-event",
 679                    G_CALLBACK(choose_button_event), 0);
 680   g_signal_connect(choose_view, "button-release-event",
 681                    G_CALLBACK(choose_button_event), 0);
 682   /* Catch row expansions so we can fill in placeholders */
 683   g_signal_connect(choose_view, "row-expanded",
 684                    G_CALLBACK(choose_row_expanded), 0);
 685
 686   event_register("queue-list-changed", choose_set_state, 0);
 687   event_register("playing-track-changed", choose_set_state, 0);
 688   event_register("search-results-changed", choose_set_state, 0);
 689   event_register("lookups-completed", choose_set_state, 0);
 690   event_register("choose-more-tracks", choose_menu_moretracks, 0);
 691
 692   /* After a rescan we update the choose tree.  We get a rescan-complete
 693    * automatically at startup and upon connection too. */
 694   event_register("rescan-complete", choose_refill, 0);
 695
 696   /* Make the widget scrollable */
 697   GtkWidget *scrolled = scroll_widget(choose_view);
 698
 699   /* Pack vertically with the search widget */
 700   GtkWidget *vbox = gtk_vbox_new(FALSE/*homogenous*/, 1/*spacing*/);
 701   gtk_box_pack_start(GTK_BOX(vbox), scrolled,
 702                      TRUE/*expand*/, TRUE/*fill*/, 0/*padding*/);
 703   gtk_box_pack_end(GTK_BOX(vbox), choose_search_widget(),
 704                    FALSE/*expand*/, FALSE/*fill*/, 0/*padding*/);
 705
 706   g_object_set_data(G_OBJECT(vbox), "type", (void *)&choose_tabtype);
 707
 708   /* Redirect keyboard activity to the search widget */
 709   g_signal_connect(choose_view, "key-press-event",
 710                    G_CALLBACK(choose_key_event), choose_search_entry);
 711   g_signal_connect(choose_view, "key-release-event",
 712                    G_CALLBACK(choose_key_event), choose_search_entry);
 713
 714   /* Enable dragging of tracks out */
 715   gtk_drag_source_set(choose_view,
 716                       GDK_BUTTON1_MASK,
 717                       choose_targets,
 718                       1,
 719                       GDK_ACTION_COPY);
 720   g_signal_connect(choose_view, "drag-data-get",
 721                    G_CALLBACK(choose_drag_data_get), NULL);
 722   make_treeview_multidrag(choose_view,
 723                           choose_multidrag_predicate);
 724
 725   return vbox;
 726 }
 727
 728 /*
 729 Local Variables:
 730 c-basic-offset:2
 731 comment-column:40
 732 fill-column:79
 733 indent-tabs-mode:nil
 734 End:
 735 */