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trackster: fix bug with fetching same data many times by putting deferred in data cache immediately, still problematic because many deferred callbacks are queued up and the tile is drawn multiple times, debug statement demonstrates this, needs more refactoring to get it right

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This commit is contained in:
James Taylor
2011-04-02 23:12:02 -04:00
parent 474ee073bb
commit f9db75311d
1 changed files with 7 additions and 4 deletions
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static/scripts/trackster.js
+7 -4
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@@ -314,10 +314,11 @@ extend(DataManager.prototype, Cache.prototype, {
}
*/
//
// Load data from server.
//
return this.load_data(chrom, low, high, mode, resolution, extra_params);
// Load data from server. The deferred is immediately saved until the
// data is ready, it then replaces itself with the actual data
entry = this.load_data(chrom, low, high, mode, resolution, extra_params);
this.set_data( low, high, mode, entry );
return entry
},
set_data: function(low, high, mode, result) {
//console.log("set_data", low, high, mode, result);
@@ -1717,6 +1718,8 @@ extend(TiledTrack.prototype, Track.prototype, {
var track = this;
// Put a 50ms delay on drawing so that if the user scrolls fast, we don't load extra data
var draw_and_show_tile = function(id, result, resolution, tile_index, parent_element, w_scale, seq_data) {
// DEBUG: this is still called too many times when moving slowly,
// console.log( "draw_and_show_tile", resolution, tile_index, w_scale );
returned_tile = track.draw_tile(result, resolution, tile_index, parent_element, w_scale, seq_data)
// Wrap element in div for background