Fixed #185

Classes/JBLineChartView.h

@@ -75,6 +75,19 @@ typedef NS_ENUM(NSInteger, JBLineChartViewLineStyle){
  */
 - (BOOL)lineChartView:(JBLineChartView *)lineChartView smoothLineAtLineIndex:(NSUInteger)lineIndex;
 
+/**
+ *  Returns the opacity value to be used for dimming the line & fill during selection events.
+ *  This value is applied to the line or fill's opacity anytime it's not selected (but another line is).
+ *
+ *  Default: 0.2.
+ *
+ *  @param lineChartView    The line chart object requesting this information.
+ *  @param lineIndex        An index number identifying a line in the chart.
+ *
+ *  @return A value between 0.0 and 1.0 (will be clamped accordingly).
+ */
+- (CGFloat)lineChartView:(JBLineChartView *)lineChartView dimmedSelectionOpacityAtLineIndex:(NSUInteger)lineIndex;
+
 /**
  *  Returns a (custom) UIView instance representing a dot (x,y point) within the chart.
  *  For this value to apply, showsDotsForLineAtLineIndex: must return YES for the line at lineIndex.
@@ -132,8 +145,8 @@ typedef NS_ENUM(NSInteger, JBLineChartViewLineStyle){
  *  Occurs whenever there is a touch gesture on the chart (chart must be expanded).
  *  The horizontal index is the closest index to the touch point & is clamped to it's max/min value if it moves outside of the view's bounds.
  *  The lineIndex remains constant until the line is deselected and will be highlighted using the (optional) selectionColorForLineAtLineIndex: protocol.
- *  Futhermore, all other lines that aren't selected will be dimmed to 20%% opacity throughout the duration of the touch/move. Any dotted line that isn't the
- *  primary selection will have it's dots dimmed to hidden (to avoid transparency issues).
+ *  Futhermore, all other lines that aren't selected will be dimmed to 20% opacity (default) throughout the duration of the touch/move. 
+ *  Any dotted line that isn't the primary selection will have it's dots dimmed to hidden (to avoid transparency issues).
  *
  *  @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

Classes/JBLineChartView.m

@@ -113,6 +113,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 - (CGFloat)paddingForLineChartLinesView:(JBLineChartLinesView *)lineChartLinesView;
 - (JBLineChartViewLineStyle)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView lineStyleForLineAtLineIndex:(NSUInteger)lineIndex;
 - (BOOL)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView smoothLineAtLineIndex:(NSUInteger)lineIndex;
+- (CGFloat)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView dimmedSelectionOpacityAtLineIndex:(NSUInteger)lineIndex;
 
 @end
 
@@ -638,6 +639,15 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
     return NO;
 }
 
+- (CGFloat)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView dimmedSelectionOpacityAtLineIndex:(NSUInteger)lineIndex
+{
+	if ([self.dataSource respondsToSelector:@selector(lineChartView:dimmedSelectionOpacityAtLineIndex:)])
+	{
+		return [self.dataSource lineChartView:self dimmedSelectionOpacityAtLineIndex:lineIndex];
+	}
+	return kJBLineChartLinesViewDefaultDimmedOpacity;
+}
+
 #pragma mark - JBLineChartDotsViewDelegate
 
 - (NSArray *)chartDataForLineChartDotsView:(JBLineChartDotsView*)lineChartDotsView
@@ -1387,7 +1397,9 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
                 {
                     NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:colorForLineAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (UIColor *)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView colorForLineAtLineIndex:(NSUInteger)lineIndex");
                     ((JBLineLayer *)layer).strokeColor = [self.delegate lineChartLinesView:self colorForLineAtLineIndex:((JBLineLayer *)layer).tag].CGColor;
-                    ((JBLineLayer *)layer).opacity = (weakSelf.selectedLineIndex == kJBLineChartLinesViewUnselectedLineIndex) ? 1.0f : kJBLineChartLinesViewDefaultDimmedOpacity;
+
+					NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:dimmedSelectionOpacityAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (CGFloat)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView dimmedSelectionOpacityAtLineIndex:(NSUInteger)lineIndex");
+					((JBLineLayer *)layer).opacity = (weakSelf.selectedLineIndex == kJBLineChartLinesViewUnselectedLineIndex) ? 1.0f : [self.delegate lineChartLinesView:self dimmedSelectionOpacityAtLineIndex:((JBLineLayer *)layer).tag];
                 }
             }
             else if ([layer isKindOfClass:[JBFillLayer class]])
@@ -1402,7 +1414,9 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
                 {
                     NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:fillColorForLineAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (UIColor *)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView fillColorForLineAtLineIndex:(NSUInteger)lineIndex");
                     ((JBFillLayer *)layer).fillColor = [self.delegate lineChartLinesView:self fillColorForLineAtLineIndex:((JBLineLayer *)layer).tag].CGColor;
-                    ((JBFillLayer *)layer).opacity = (weakSelf.selectedLineIndex == kJBLineChartLinesViewUnselectedLineIndex) ? 1.0f : kJBLineChartLinesViewDefaultDimmedOpacity;
+					
+					NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:dimmedSelectionOpacityAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (CGFloat)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView dimmedSelectionOpacityAtLineIndex:(NSUInteger)lineIndex");
+					((JBFillLayer *)layer).opacity = (weakSelf.selectedLineIndex == kJBLineChartLinesViewUnselectedLineIndex) ? 1.0f : [self.delegate lineChartLinesView:self dimmedSelectionOpacityAtLineIndex:((JBLineLayer *)layer).tag];
                 }
             }
         }

JBChartViewDemo/JBChartViewDemo/Controllers/JBAreaChartViewController.m

@@ -29,6 +29,8 @@ CGFloat const kJBAreaChartViewControllerChartHeaderHeight = 75.0f;
 CGFloat const kJBAreaChartViewControllerChartHeaderPadding = 20.0f;
 CGFloat const kJBAreaChartViewControllerChartFooterHeight = 20.0f;
 CGFloat const kJBAreaChartViewControllerChartLineWidth = 2.0f;
+CGFloat const kJBAreaChartViewControllerChartSunLineDimmedOpacity = 1.0f;
+CGFloat const kJBAreaChartViewControllerChartMoonLineDimmedOpacity = 0.0f;
 NSInteger const kJBAreaChartViewControllerMaxNumChartPoints = 12;
 
 // Strings
@@ -198,6 +200,18 @@ NSString * const kJBAreaChartViewControllerNavButtonViewKey = @"view";
     return YES;
 }
 
+- (CGFloat)lineChartView:(JBLineChartView *)lineChartView dimmedSelectionOpacityAtLineIndex:(NSUInteger)lineIndex
+{
+	if (lineIndex == JBLineChartLineMoon)
+	{
+		return kJBAreaChartViewControllerChartMoonLineDimmedOpacity;
+	}
+	else
+	{
+		return kJBAreaChartViewControllerChartSunLineDimmedOpacity;
+	}
+}
+
 #pragma mark - JBLineChartViewDelegate
 
 - (CGFloat)lineChartView:(JBLineChartView *)lineChartView verticalValueForHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex