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var SongTable = Backbone.View.extend({
initialize: function() {
var that = this;
_(this).bindAll("remove", "render", "renderMore", "appendSong", "showHideLoadall");
this.$songlistContainer = this.$el.find("#songlist-container");
this.$tbody = this.$songlistContainer.find("tbody");
this.$songlistContainer.scroll(function() {
if (that.collection.hasMore() && this.scrollHeight - (this.scrollTop + this.clientHeight) < 2000)
that.collection.more();
});
this.$searchProgress = this.$el.find("#search-progress");
this.collection.on("request", function() {
that.$searchProgress.removeClass().addClass("icon-spinner").addClass("icon-spin");
}).on("sync", function() {
that.$searchProgress.removeClass().addClass("icon-search");
});
this.$query = this.$el.find("#query");
var doSearch = function() {
var val = that.$query.val();
if (val != that.collection.options.query)
that.collection.search({ query: val });
};
var latestSearchTimer = null;
this.$query.change(doSearch).keyup(function() {
if (latestSearchTimer != null)
clearTimeout(latestSearchTimer);
latestSearchTimer = setTimeout(doSearch, 350);
});
this.$loadall = this.$el.find("#loadall").click(function() {
that.$loadall.fadeOut();
that.collection.more({ limit: 0 });
});
this.listenTo(this.collection, "remove", this.remove);
this.listenTo(this.collection, "reset", this.render);
this.listenTo(this.collection, "more", this.renderMore);
this.render();
},
remove: function(song) {
if (song.id in this.songRows)
delete this.songRows[song.id];
},
appendSong: function(song) {
var that = this;
var ref = this.viewRef;
_.defer(function() {
var row;
if (ref !== that.viewRef)
return;
if (!(song.id in that.songRows))
row = that.songRows[song.id] = new SongRow({ model: song });
that.$tbody.append(row.render().el);
});
},
render: function() {
this.$tbody.empty().scrollTop(0);
this.songRows = {};
this.viewRef = new Object();
this.collection.each(this.appendSong);
this.showHideLoadall();
return this;
},
renderMore: function(more) {
more.each(this.appendSong);
this.showHideLoadall();
},
showHideLoadall: function() {
if (this.collection.hasMore() && !this.$loadall.is(":visible"))
this.$loadall.fadeIn();
else if (!this.collection.hasMore() && this.$loadall.is(":visible"))
this.$loadall.fadeOut();
},
scrollTo: function(song) {
var that = this;
_.defer(function() {
if (!(song.id in that.songRows))
return;
var offset = that.songRows[song.id].$el.offset().top;
if (that.$songlistContainer.scrollTop() + that.$songlistContainer.height() >= offset)
return;
that.$songlistContainer.scrollTop(offset - that.$songlistContainer.height() / 2);
});
}
});
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