Merge pull request #34 from mrdnote/master

Add option to draw the line skewed

Author: etimberg

README.md

@@ -45,6 +45,9 @@ Vertical or horizontal lines are supported.
 	// Data value to draw the line at
 	value: 25,
 
+	// Optional value at which the line draw should end
+	endValue: 26,
+
 	// Line color
 	borderColor: 'red',
 

src/line.js

@@ -32,17 +32,22 @@ module.exports = function(Chart) {
 
 		var scale = chartInstance.scales[options.scaleID];
 		var pixel = scale ? scale.getPixelForValue(options.value) : NaN;
+		var endPixel = scale && isValid(options.endValue) ? scale.getPixelForValue(options.endValue) : NaN;
+		if (isNaN(endPixel))
+		    endPixel = pixel;
 		var chartArea = chartInstance.chartArea;
 
 		if (!isNaN(pixel)) {
 			if (options.mode == horizontalKeyword) {
 				model.x1 = chartArea.left;
 				model.x2 = chartArea.right;
-				model.y1 = model.y2 = pixel;
+				model.y1 = pixel;
+				model.y2 = endPixel;
 			} else {
 				model.y1 = chartArea.top;
 				model.y2 = chartArea.bottom;
-				model.x1 = model.x2 = pixel;
+				model.x1 = pixel;
+				model.x2 = endPixel;
 			}
 		}