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Make sure that we only save the tree reference if we have actually rendered it.

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This commit is contained in:
Joseph Schorr 2014-05-01 16:11:50 -04:00
parent c2ed1a9e52
commit 8da4104e7b
2 changed files with 30 additions and 22 deletions
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7
static/js/graphing.js
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@ -196,6 +196,11 @@ ImageHistoryTree.prototype.draw = function(container) {
var rootSvg = d3.select("#" + container).append("svg:svg")
.attr("class", "image-tree");
if (!rootSvg) {
this.container_ = null;
return;
}
var vis = rootSvg.append("svg:g");
if (!vis) {
this.container_ = null;
@ -266,6 +271,8 @@ ImageHistoryTree.prototype.draw = function(container) {
this.setTag_(this.currentTag_);
this.setupOverscroll_();
return this;
};