chiark - git - mdw - disorder/blob - disobedience/choose-menu.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-menu.c
  19  * @brief Popup menu for choose screen
  20  */
  21 #include "disobedience.h"
  22 #include "popup.h"
  23 #include "choose.h"
  24
  25 /** @brief Popup menu */
  26 static GtkWidget *choose_menu;
  27
  28 /** @brief Path to directory pending a "select children" operation */
  29 static GtkTreePath *choose_eventually_select_children;
  30
  31 /** @brief Recursion step for choose_get_visible()
  32  * @param parent A visible node, or NULL for the root
  33  * @param callback Called for each visible node
  34  * @param userdata Passed to @p callback
  35  *
  36  * If @p callback returns nonzero, the walk stops immediately.
  37  */
  38 static int choose_visible_recurse(GtkTreeIter *parent,
  39                                   int (*callback)(GtkTreeIter *it,
  40                                                   int isfile,
  41                                                   void *userdata),
  42                                   void *userdata) {
  43   int expanded;
  44   if(parent) {
  45     /* Skip placeholders */
  46     if(choose_is_placeholder(parent))
  47       return 0;
  48     const int isfile = choose_is_file(parent);
  49     if(callback(parent, isfile, userdata))
  50       return 1;
  51     if(isfile)
  52       return 0;                 /* Files never have children */
  53     GtkTreePath *parent_path
  54       = gtk_tree_model_get_path(GTK_TREE_MODEL(choose_store),
  55                                 parent);
  56     expanded = gtk_tree_view_row_expanded(GTK_TREE_VIEW(choose_view),
  57                                           parent_path);
  58     gtk_tree_path_free(parent_path);
  59   } else
  60     expanded = 1;
  61   /* See if parent is expanded */
  62   if(expanded) {
  63     /* Parent is expanded, visit all its children */
  64     GtkTreeIter it[1];
  65     gboolean itv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
  66                                                 it,
  67                                                 parent);
  68     while(itv) {
  69       if(choose_visible_recurse(it, callback, userdata))
  70         return TRUE;
  71       itv = gtk_tree_model_iter_next(GTK_TREE_MODEL(choose_store), it);
  72     }
  73   }
  74   return 0;
  75 }
  76
  77 /** @brief Should edit->select all be sensitive?  No, for the choose tab. */
  78 static int choose_selectall_sensitive(void attribute((unused)) *extra) {
  79   return FALSE;
  80 }
  81
  82 /** @brief Activate edit->select all (which should do nothing) */
  83 static void choose_selectall_activate(GtkMenuItem attribute((unused)) *item,
  84                                       gpointer attribute((unused)) userdata) {
  85 }
  86
  87 /** @brief Should 'select none' be sensitive
  88  *
  89  * Yes if anything is selected.
  90  */
  91 static int choose_selectnone_sensitive(void attribute((unused)) *extra) {
  92   return gtk_tree_selection_count_selected_rows(choose_selection) > 0;
  93 }
  94
  95 /** @brief Activate select none */
  96 static void choose_selectnone_activate(GtkMenuItem attribute((unused)) *item,
  97                                        gpointer attribute((unused)) userdata) {
  98   gtk_tree_selection_unselect_all(choose_selection);
  99 }
 100
 101 static void choose_play_sensitive_callback(GtkTreeModel attribute((unused)) *model,
 102                                            GtkTreePath attribute((unused)) *path,
 103                                            GtkTreeIter *iter,
 104                                            gpointer data) {
 105   int *filesp = data;
 106
 107   if(*filesp == -1)
 108     return;
 109   if(choose_is_dir(iter))
 110     *filesp = -1;
 111   else if(choose_is_file(iter))
 112     ++*filesp;
 113 }
 114
 115 /** @brief Should 'play' be sensitive?
 116  *
 117  * Yes if tracks are selected and no directories are */
 118 static int choose_play_sensitive(void attribute((unused)) *extra) {
 119   int files = 0;
 120
 121   gtk_tree_selection_selected_foreach(choose_selection,
 122                                       choose_play_sensitive_callback,
 123                                       &files);
 124   return files > 0;
 125 }
 126
 127 static void choose_gather_selected_files_callback(GtkTreeModel attribute((unused)) *model,
 128                                                   GtkTreePath attribute((unused)) *path,
 129                                                   GtkTreeIter *iter,
 130                                                   gpointer data) {
 131   struct vector *v = data;
 132
 133   if(choose_is_file(iter))
 134     vector_append(v, choose_get_track(iter));
 135 }
 136
 137 static void choose_gather_selected_dirs_callback(GtkTreeModel attribute((unused)) *model,
 138                                                  GtkTreePath attribute((unused)) *path,
 139                                                  GtkTreeIter *iter,
 140                                                  gpointer data) {
 141   struct vector *v = data;
 142
 143   if(choose_is_dir(iter))
 144     vector_append(v, choose_get_track(iter));
 145 }
 146
 147
 148 static void choose_play_activate(GtkMenuItem attribute((unused)) *item,
 149                                  gpointer attribute((unused)) userdata) {
 150   struct vector v[1];
 151   vector_init(v);
 152   gtk_tree_selection_selected_foreach(choose_selection,
 153                                       choose_gather_selected_files_callback,
 154                                       v);
 155   for(int n = 0; n < v->nvec; ++n)
 156     disorder_eclient_play(client, v->vec[n], choose_play_completed, 0);
 157 }
 158
 159 static int choose_properties_sensitive(void *extra) {
 160   return choose_play_sensitive(extra);
 161 }
 162
 163 static void choose_properties_activate(GtkMenuItem attribute((unused)) *item,
 164                                        gpointer attribute((unused)) userdata) {
 165   struct vector v[1];
 166   vector_init(v);
 167   gtk_tree_selection_selected_foreach(choose_selection,
 168                                       choose_gather_selected_files_callback,
 169                                       v);
 170   properties(v->nvec, (const char **)v->vec);
 171 }
 172
 173 /** @brief Set sensitivity for select children
 174  *
 175  * Sensitive if we've selected exactly one directory.
 176  */
 177 static int choose_selectchildren_sensitive(void attribute((unused)) *extra) {
 178   struct vector v[1];
 179   /* Only one thing should be selected */
 180   if(gtk_tree_selection_count_selected_rows(choose_selection) != 1)
 181     return FALSE;
 182   /* The selected thing should be a directory */
 183   vector_init(v);
 184   gtk_tree_selection_selected_foreach(choose_selection,
 185                                       choose_gather_selected_dirs_callback,
 186                                       v);
 187   return v->nvec == 1;
 188 }
 189
 190 /** @brief Actually select the children of path
 191  *
 192  * We deselect everything else, too.
 193  */
 194 static void choose_select_children(GtkTreePath *path) {
 195   GtkTreeIter iter[1], child[1];
 196
 197   if(gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), iter, path)) {
 198     gtk_tree_selection_unselect_all(choose_selection);
 199     for(int n = 0;
 200         gtk_tree_model_iter_nth_child(GTK_TREE_MODEL(choose_store), child,
 201                                       iter, n);
 202         ++n) {
 203       if(choose_is_file(child))
 204         gtk_tree_selection_select_iter(choose_selection, child);
 205     }
 206   }
 207 }
 208
 209 /** @brief Called to expand the children of path/iter */
 210 static void choose_selectchildren_callback(GtkTreeModel attribute((unused)) *model,
 211                                            GtkTreePath *path,
 212                                            GtkTreeIter attribute((unused)) *iter,
 213                                            gpointer attribute((unused)) data) {
 214   if(gtk_tree_view_row_expanded(GTK_TREE_VIEW(choose_view), path)) {
 215     /* Directory is already expanded */
 216     choose_select_children(path);
 217   } else {
 218     /* Directory is not expanded, so expand it */
 219     gtk_tree_view_expand_row(GTK_TREE_VIEW(choose_view), path, FALSE/*!expand_all*/);
 220     /* Select its children when it's done */
 221     if(choose_eventually_select_children)
 222       gtk_tree_path_free(choose_eventually_select_children);
 223     choose_eventually_select_children = gtk_tree_path_copy(path);
 224   }
 225 }
 226
 227 /** @brief Called when all pending track fetches are finished
 228  *
 229  * If there's a pending select-children operation, it can now be actioned
 230  * (or might have gone stale).
 231  */
 232 void choose_menu_moretracks(const char attribute((unused)) *event,
 233                             void attribute((unused)) *eventdata,
 234                             void attribute((unused)) *callbackdata) {
 235   if(choose_eventually_select_children) {
 236     choose_select_children(choose_eventually_select_children);
 237     gtk_tree_path_free(choose_eventually_select_children);
 238     choose_eventually_select_children = 0;
 239   }
 240 }
 241
 242 /** @brief Select all children
 243  *
 244  * Easy enough if the directory is already expanded, we can just select its
 245  * children.  However if it is not then we must expand it and _when this has
 246  * completed_ select its children.
 247  *
 248  * The way this is implented could cope with multiple directories but
 249  * choose_selectchildren_sensitive() should stop this.
 250  */
 251 static void choose_selectchildren_activate
 252     (GtkMenuItem attribute((unused)) *item,
 253      gpointer attribute((unused)) userdata) {
 254   gtk_tree_selection_selected_foreach(choose_selection,
 255                                       choose_selectchildren_callback,
 256                                       0);
 257 }
 258
 259 /** @brief Pop-up menu for choose */
 260 static struct menuitem choose_menuitems[] = {
 261   {
 262     "Play track",
 263     choose_play_activate,
 264     choose_play_sensitive,
 265     0,
 266     0
 267   },
 268   {
 269     "Track properties",
 270     choose_properties_activate,
 271     choose_properties_sensitive,
 272     0,
 273     0
 274   },
 275   {
 276     "Select children",
 277     choose_selectchildren_activate,
 278     choose_selectchildren_sensitive,
 279     0,
 280     0
 281   },
 282   {
 283     "Deselect all tracks",
 284     choose_selectnone_activate,
 285     choose_selectnone_sensitive,
 286     0,
 287     0
 288   },
 289 };
 290
 291 const struct tabtype choose_tabtype = {
 292   choose_properties_sensitive,
 293   choose_selectall_sensitive,
 294   choose_selectnone_sensitive,
 295   choose_properties_activate,
 296   choose_selectall_activate,
 297   choose_selectnone_activate,
 298   0,
 299   0
 300 };
 301
 302 /** @brief Called when a mouse button is pressed or released */
 303 gboolean choose_button_event(GtkWidget attribute((unused)) *widget,
 304                              GdkEventButton *event,
 305                              gpointer attribute((unused)) user_data) {
 306   if(event->type == GDK_BUTTON_RELEASE && event->button == 2) {
 307     /* Middle click release - play track */
 308     ensure_selected(GTK_TREE_VIEW(choose_view), event);
 309     choose_play_activate(NULL, NULL);
 310   } else if(event->type == GDK_BUTTON_PRESS && event->button == 3) {
 311     /* Right click press - pop up the menu */
 312     ensure_selected(GTK_TREE_VIEW(choose_view), event);
 313     popup(&choose_menu, event,
 314           choose_menuitems, sizeof choose_menuitems / sizeof *choose_menuitems,
 315           0);
 316     return TRUE;
 317   }
 318   return FALSE;
 319 }
 320
 321 /*
 322 Local Variables:
 323 c-basic-offset:2
 324 comment-column:40
 325 fill-column:79
 326 indent-tabs-mode:nil
 327 End:
 328 */