readme and comment

Delegate call to ignore touches on selected lines

Classes/JBLineChartView.h

@@ -150,6 +150,16 @@ typedef NS_ENUM(NSInteger, JBLineChartViewLineStyle){
  */
 - (void)didDeselectLineInLineChartView:(JBLineChartView *)lineChartView;
 
+/**
+ *  Returns whether or not a line at a particular index responds to selection events. 
+ *
+ *  Default: YES
+ *
+ *  @param lineChartView    A line chart object informing the delegate about the new selection.
+ *  @param lineIndex        An index number identifying the closest line in the chart to the current touch
+ */
+- (BOOL)lineChartView:(JBLineChartView *)lineChartView shouldIgnoreSelectionAtIndex:(NSUInteger)lineIndex;
+
 /**
  *  Returns the color of particular line at lineIndex within the chart.
  *

Classes/JBLineChartView.m

@@ -952,6 +952,15 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
     for (NSUInteger lineIndex=0; lineIndex<numberOfLines; lineIndex++)
     {
         NSAssert([self.dataSource respondsToSelector:@selector(lineChartView:numberOfVerticalValuesAtLineIndex:)], @"JBLineChartView // dataSource must implement - (NSUInteger)lineChartView:(JBLineChartView *)lineChartView numberOfVerticalValuesAtLineIndex:(NSUInteger)lineIndex");
+        
+        if ([self.delegate respondsToSelector:@selector(lineChartView:shouldIgnoreSelectionAtIndex:)])
+        {
+            if([self.delegate lineChartView:self shouldIgnoreSelectionAtIndex:lineIndex])
+            {
+                continue;
+            }
+        }
+        
         if ([self.dataSource lineChartView:self numberOfVerticalValuesAtLineIndex:lineIndex] > rightHorizontalIndex)
         {
             NSArray *lineData = [self.chartData objectAtIndex:lineIndex];

README.md

@@ -279,7 +279,7 @@ As well, by default, each line will have squared off end caps and connection poi
 
 	- (BOOL)lineChartView:(JBLineChartView *)lineChartView smoothLineAtLineIndex:(NSUInteger)lineIndex;
 		
-Lastly, a line chart's selection events are delegated back via:
+Furthermore, a line chart's selection events are delegated back via:
 
 	- (void)lineChartView:(JBLineChartView *)lineChartView didSelectLineAtIndex:(NSUInteger)lineIndex horizontalIndex:(NSUInteger)horizontalIndex touchPoint:(CGPoint)touchPoint
 	{
@@ -291,6 +291,13 @@ Lastly, a line chart's selection events are delegated back via:
 		// Update view
 	}
 	
+Lastly, if you don't want a line to be selectable:
+
+	- (BOOL)lineChartView:(JBLineChartView *)lineChartView shouldIgnoreSelectionAtIndex:(NSUInteger)lineIndex
+	{
+		return NO; // Check line index
+	}
+	
 The <b>touchPoint</b> is especially important as it allows you to add custom elements to your chart during  selection events. Refer to the demo project (<b>JBLineChartViewController</b>) to see how a tooltip can be used to display additional information during selection events.
 
 ## Minimum & Maximum Values