adding faceted browsing methods

js/Faceted.js

@@ -0,0 +1,146 @@
+var SelectedItems = new Hash();
+var selected_tracks_shown = false;
+
+function start_faceted_browsing (currentSelection) {
+    SelectedItems = new Hash();
+    if(currentSelection) {
+        currentSelection = String(currentSelection).split(",");
+        for( var i = 0; i < currentSelection.length; i++) {
+            SelectedItems.set(currentSelection[i],1);
+        }
+        var selected = SelectedItems.keys();
+        }
+    else {
+        var selected = [];
+    }
+    if (selected.size() > 0) {
+        if(selected_tracks_shown) {
+            selected_tracks_text_shown(selected);
+        } else {
+            selected_tracks_text_hidden(selected);
+        }
+    } else {
+        selected_tracks_text_none();
+    }
+    var divs = $$('.submission');
+    divs.each (function (d) {
+        var id = d.getAttribute('ex:itemid');
+        if (SelectedItems.get(id)) {
+            d.addClassName('selected');
+            d.select('input')[0].checked=1;
+        } else {
+            d.removeClassName('selected');
+            d.select('input')[0].checked=0;
+        }
+    });
+}
+
+function selected_tracks_text_none (){
+    $('selection_count').innerHTML='no tracks selected';
+}
+function selected_tracks_text_hidden (selected){
+    //$('selection_count').innerHTML   = selected.size()+' tracks selected';
+    $('selection_count').innerHTML  = ' <a href="javascript:clear_all()">clear selected tracks</a>';
+    //$('selection_count').innerHTML  += ' [<a href="javascript:show_track_names()">show selected track names</a>]';
+}
+function selected_tracks_text_shown (selected) {
+    //$('selection_count').innerHTML   = selected.size()+' tracks selected';
+    $('selection_count').innerHTML  = ' <a href="javascript:clear_all()">clear selected tracks</a>';
+    //$('selection_count').innerHTML  += ' [<a href="javascript:hide_track_names()">hide selected track names</a>]';
+    //$('selection_count').innerHTML  += '<br/> Selected tracks: '+ selected.join(", ");
+}
+
+function hide_track_names() {
+    var selected = SelectedItems.keys();
+    if (selected.size() > 0) {
+        selected_tracks_text_hidden(selected);
+    } else {
+        selected_tracks_text_none();
+    }
+    selected_tracks_shown = false;
+}
+
+function show_track_names() {
+    var selected = SelectedItems.keys();
+    if (selected.size() > 0) {
+        selected_tracks_text_shown(selected);
+    } else {
+        selected_tracks_text_none();
+    }
+    selected_tracks_shown = true;
+}
+
+function clear_all () {
+    SelectedItems = new Hash();
+    var divs = $$('.submission');
+    divs.each (function (d) {
+        var id = d.getAttribute('ex:itemid');
+        if (SelectedItems.get(id)) {
+            d.addClassName('selected');
+            d.select('input')[0].checked=1;
+        } else {
+            d.removeClassName('selected');
+            d.select('input')[0].checked=0;
+        }
+    });
+    $('selection_count').innerHTML = 'no tracks selected';
+    parent.b.removeAllTracks();
+}
+
+function load_tracks () {
+    var selected = SelectedItems.keys();
+    parent.b.removeAllTracks();
+    parent.b.showTracks(selected.join(","));
+
+    /*if (selected.size() > 0) {
+        b.hideAllTrackList();
+        for(var i = 0; i < selected.size(); i++) {
+            b.showTrackListNode(selected[i]);
+        }
+    } else {
+      b.showAllTrackList();
+    }*/
+}
+
+function hilight_items (d) {
+    var divs = $$('.submission');
+    if(d) {
+    var id = d.getAttribute('ex:itemid');
+        if (SelectedItems.get(id)) {
+            d.addClassName('selected');
+            d.select('input')[0].checked=1;
+        } else {
+            d.removeClassName('selected');
+            d.select('input')[0].checked=0;
+        }
+    }
+}
+
+function toggle_track (container) {
+    var id = container.getAttribute('ex:itemid');
+
+    turn_on = !container.hasClassName('selected');
+
+    if (turn_on) {
+        container.addClassName('selected');
+        SelectedItems.set(id,1);
+        container.select('input')[0].checked=1;
+        parent.b.showTracks(id);
+    } else {
+        container.removeClassName('selected');
+        container.select('input')[0].checked=0;
+        SelectedItems.unset(id);
+        parent.dijit.getEnclosingWidget(parent.dojo.byId("label_"+id).firstChild).onClick();
+    }
+    var selected = SelectedItems.keys();
+    if (selected.size() > 0) {
+        if(selected_tracks_shown) {
+            selected_tracks_text_shown(selected);
+        } else {
+            selected_tracks_text_hidden(selected);
+        }
+    } else {
+        selected_tracks_text_none();
+    }
+}
+