Don't clear overlay on mouseup if not zooming.

[dygraphs.git] / dashed-canvas.js

diff --git a/dashed-canvas.js b/dashed-canvas.js
index af2470e..d8ebac0 100644 (file)
--- a/dashed-canvas.js
+++ b/dashed-canvas.js
@@ -161,3 +161,13 @@ CanvasRenderingContext2D.prototype.installPattern = function(pattern) {
     segments = [];
   };
 };
+
+/**
+ * Removes the previously-installed pattern.
+ * You must call installPattern() before calling this. You can install at most
+ * one pattern at a time--there is no pattern stack.
+ */
+CanvasRenderingContext2D.prototype.uninstallPattern = function() {
+  // This will be replaced by a non-error version when a pattern is installed.
+  throw "Must install a line pattern before uninstalling it.";
+}