Updated comment, read me, pod spec, etc

Add delegate method barChartView:colorForBarViewAtIndex: to JBBarChartViewDataSource

CHANGELOG.md

@@ -1,5 +1,37 @@
 # Changelog
 
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.5.4">2.5.4</a>
+#### 05/07/14
+- Additional fixes to issue <a href="https://github.com/Jawbone/JBChartView/pull/53">#53</a>.
+
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.5.3">2.5.3</a>
+#### 05/06/14
+- More compiler warning fixes.
+
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.5.2">2.5.2</a> 
+#### 05/06/14
+- Fixed compiler warnings. 
+
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.5.1">2.5.1</a> 
+#### 05/05/14
+- Additional fixes to issue <a href="https://github.com/Jawbone/JBChartView/pull/48">#48</a>.
+
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.5.0">2.5.0</a> 
+#### 05/04/14
+- Fixes issue <a href="https://github.com/Jawbone/JBChartView/pull/48">#48</a>.
+
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.4.3">2.4.3</a> 
+#### 05/04/14
+- Fixes issue <a href="https://github.com/Jawbone/JBChartView/pull/49">#49</a>.
+
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.4.2">2.4.2</a> 
+#### 04/30/14
+- Fixes issue <a href="https://github.com/Jawbone/JBChartView/pull/46">#46</a>.
+
+## <a href="https://github.com/Jawbone/JBChartView/tree/v2.4.1">2.4.1</a> 
+#### 04/30/14
+- Fixes issue <a href="https://github.com/Jawbone/JBChartView/pull/45">#45</a>.
+
 ## <a href="https://github.com/Jawbone/JBChartView/tree/v2.4.0">2.4.0</a> 
 #### 04/28/14
 - Fixes issue <a href="https://github.com/Jawbone/JBChartView/pull/23">#23</a>.

Classes/JBBarChartView.h

@@ -102,9 +102,22 @@
  */
 - (UIView *)barChartView:(JBBarChartView *)barChartView barViewAtIndex:(NSUInteger)index;
 
+/**
+ *  If you already implement barChartView:barViewAtIndex: delegate - this method has no effect.
+ *  If a custom UIView isn't supplied, a flat bar will be made automatically (default color black).
+ *
+ *  Default: if none specified - calls barChartView:barViewAtIndex:.
+ *
+ *  @param barChartView     The bar chart object requesting this information.
+ *  @param index            The 0-based index of a given bar (left to right, x-axis).
+ *
+ *  @return The color to be used to color a bar in the chart.
+ */
+- (UIColor *)barChartView:(JBBarChartView *)barChartView colorForBarViewAtIndex:(NSUInteger)index;
+
 /**
  *  The selection color to be overlayed on a bar during touch events. 
- *  The color is automically faded to transparent (vertically). The property showsVerticalSelection
+ *  The color is automatically faded to transparent (vertically). The property showsVerticalSelection
  *  must be YES for the color to apply.
  *
  *  Default: white color (faded to transparent).

Classes/JBBarChartView.m

@@ -18,6 +18,13 @@ NSInteger static const kJBBarChartViewUndefinedBarIndex = -1;
 // Colors (JBChartView)
 static UIColor *kJBBarChartViewDefaultBarColor = nil;
 
+@interface JBChartView (Private)
+
+- (BOOL)hasMaximumValue;
+- (BOOL)hasMinimumValue;
+
+@end
+
 @interface JBBarChartView ()
 
 @property (nonatomic, strong) NSDictionary *chartDataDictionary; // key = column, value = height
@@ -34,8 +41,6 @@ static UIColor *kJBBarChartViewDefaultBarColor = nil;
 // View quick accessors
 - (CGFloat)availableHeight;
 - (CGFloat)normalizedHeightForRawHeight:(NSNumber*)rawHeight;
-- (CGFloat)minHeight;
-- (CGFloat)maxHeight;
 - (CGFloat)barWidth;
 - (CGFloat)popOffset;
 
@@ -176,8 +181,21 @@ static UIColor *kJBBarChartViewDefaultBarColor = nil;
             else
             {
                 barView = [[UIView alloc] init];
-                barView.backgroundColor = kJBBarChartViewDefaultBarColor;
+                UIColor *backgroundColor = nil;
+
+                if ([self.dataSource respondsToSelector:@selector(barChartView:colorForBarViewAtIndex:)])
+                {
+                    backgroundColor = [self.dataSource barChartView:self colorForBarViewAtIndex:index];
+                    NSAssert(backgroundColor != nil, @"JBBarChartView // datasource function - (UIColor *)barChartView:(JBBarChartView *)barChartView colorForBarViewAtIndex:(NSUInteger)index must return a non-nil UIColor");
+                }
+                else
+                {
+                    backgroundColor = kJBBarChartViewDefaultBarColor;
+                }
+
+                barView.backgroundColor = backgroundColor;
             }
+
             CGFloat height = [self normalizedHeightForRawHeight:[self.chartDataDictionary objectForKey:key]];
             CGFloat extensionHeight = height > 0.0 ? kJBBarChartViewPopOffset : 0.0;
             barView.frame = CGRectMake(xOffset, self.bounds.size.height - height - self.footerView.frame.size.height + self.headerPadding, [self barWidth], height + extensionHeight - self.headerPadding);
@@ -252,8 +270,8 @@ static UIColor *kJBBarChartViewDefaultBarColor = nil;
 
 - (CGFloat)normalizedHeightForRawHeight:(NSNumber*)rawHeight
 {
-    CGFloat minHeight = [self minHeight];
-    CGFloat maxHeight = [self maxHeight];
+    CGFloat minHeight = [self minimumValue];
+    CGFloat maxHeight = [self maximumValue];
     CGFloat value = [rawHeight floatValue];
     
     if ((maxHeight - minHeight) <= 0)
@@ -264,24 +282,6 @@ static UIColor *kJBBarChartViewDefaultBarColor = nil;
     return ((value - minHeight) / (maxHeight - minHeight)) * [self availableHeight];
 }
 
-- (CGFloat)minHeight
-{
-    if (self.mininumValue != kJBChartViewUndefinedMinimumValue)
-    {
-        return MIN(self.mininumValue, self.cachedMinHeight);
-    }
-    return self.cachedMinHeight;
-}
-
-- (CGFloat)maxHeight
-{
-    if (self.maximumValue != kJBChartViewUndefinedMaximumValue)
-    {
-        return MAX(self.maximumValue, self.cachedMaxHeight);
-    }
-    return self.cachedMaxHeight;
-}
-
 - (CGFloat)barWidth
 {
     NSUInteger barCount = [[self.chartDataDictionary allKeys] count];
@@ -380,8 +380,7 @@ static UIColor *kJBBarChartViewDefaultBarColor = nil;
 {
     if(_cachedMinHeight == kJBBarChartViewUndefinedCachedHeight)
     {
-        // min height is min value across all goals and values
-        NSArray *chartValues = [[[self.chartDataDictionary allValues] arrayByAddingObjectsFromArray:[self.chartDataDictionary allValues]] sortedArrayUsingSelector:@selector(compare:)];
+        NSArray *chartValues = [[NSMutableArray arrayWithArray:[self.chartDataDictionary allValues]] sortedArrayUsingSelector:@selector(compare:)];
         _cachedMinHeight =  [[chartValues firstObject] floatValue];
     }
     return _cachedMinHeight;
@@ -391,29 +390,28 @@ static UIColor *kJBBarChartViewDefaultBarColor = nil;
 {
     if (_cachedMaxHeight == kJBBarChartViewUndefinedCachedHeight)
     {
-        // max height is max value across all goals and values
-        NSArray *chartValues = [[[self.chartDataDictionary allValues] arrayByAddingObjectsFromArray:[self.chartDataDictionary allValues]] sortedArrayUsingSelector:@selector(compare:)];
+        NSArray *chartValues = [[NSMutableArray arrayWithArray:[self.chartDataDictionary allValues]] sortedArrayUsingSelector:@selector(compare:)];
         _cachedMaxHeight =  [[chartValues lastObject] floatValue];
     }
     return _cachedMaxHeight;
 }
 
-- (CGFloat)mininumValue
+- (CGFloat)minimumValue
 {
-    if ([super mininumValue] == kJBChartViewUndefinedMinimumValue)
+    if ([self hasMinimumValue])
     {
-        return self.cachedMinHeight;
+        return fminf(self.cachedMinHeight, [super minimumValue]);
     }
-    return [super mininumValue];
+    return self.cachedMinHeight;
 }
 
 - (CGFloat)maximumValue
 {
-    if ([super maximumValue] == kJBChartViewUndefinedMaximumValue)
+    if ([self hasMaximumValue])
     {
-        return self.cachedMaxHeight;
+        return fmaxf(self.cachedMaxHeight, [super maximumValue]);
     }
-    return [super maximumValue];
+    return self.cachedMaxHeight;    
 }
 
 #pragma mark - Touch Helpers

Classes/JBChartView.h

@@ -9,8 +9,6 @@
 #import <Foundation/Foundation.h>
 
 extern CGFloat const kJBChartViewDefaultAnimationDuration;
-extern CGFloat const kJBChartViewUndefinedMinimumValue; // helper for undefined min/max values
-extern CGFloat const kJBChartViewUndefinedMaximumValue;
 
 /**
  * At a minimum, a chart can support two states, along with animations to-and-from.
@@ -43,7 +41,10 @@ typedef NS_ENUM(NSInteger, JBChartViewState){
 
 /**
  *  The minimum and maxmimum values of the chart. 
- *  If no value(s) are supplied, the min and max values of the chart's data source are used.
+ *  If no value(s) are supplied:
+ *  
+ *  minimumValue = chart's data source min value. 
+ *  maxmimumValue = chart's data source max value.
  *
  *  If value(s) are supplied, they must be >= 0, otherwise an assertion will be thrown. 
  *  The min/max values are clamped to the ceiling and floor of the actual min/max values of the chart's data source;
@@ -51,9 +52,13 @@ typedef NS_ENUM(NSInteger, JBChartViewState){
  *
  *  For min/max modifications to take effect, reloadData must be called.
  */
-@property (nonatomic, assign) CGFloat mininumValue;
+@property (nonatomic, assign) CGFloat minimumValue;
 @property (nonatomic, assign) CGFloat maximumValue;
 
+// reset to default (chart's data source min & max value)
+- (void)resetMinimumValue;
+- (void)resetMaximumValue;
+
 /**
  *  Charts can either be expanded or contracted. 
  *  By default, a chart should be expanded on initialization.

Classes/JBChartView.m

@@ -8,15 +8,17 @@
 
 #import "JBChartView.h"
 
+// Numerics
 CGFloat const kJBChartViewDefaultAnimationDuration = 0.25f;
-CGFloat const kJBChartViewUndefinedMinimumValue = -1.0f;
-CGFloat const kJBChartViewUndefinedMaximumValue = -1.0f;
 
 // Color (JBChartSelectionView)
 static UIColor *kJBChartVerticalSelectionViewDefaultBgColor = nil;
 
 @interface JBChartView ()
 
+@property (nonatomic, assign) BOOL hasMaximumValue;
+@property (nonatomic, assign) BOOL hasMinimumValue;
+
 // Construction
 - (void)constructChartView;
 
@@ -59,8 +61,6 @@ static UIColor *kJBChartVerticalSelectionViewDefaultBgColor = nil;
 - (void)constructChartView
 {
     self.clipsToBounds = YES;
-    _mininumValue = kJBChartViewUndefinedMinimumValue;
-    _maximumValue = kJBChartViewUndefinedMaximumValue;
 }
 
 #pragma mark - Public
@@ -138,16 +138,28 @@ static UIColor *kJBChartVerticalSelectionViewDefaultBgColor = nil;
     [self setState:state animated:NO];
 }
 
-- (void)setMininumValue:(CGFloat)mininumValue
+- (void)setMinimumValue:(CGFloat)minimumValue
 {
-    NSAssert(mininumValue >= 0, @"JBChartView // the minimumValue must be >= 0.");
-    _mininumValue = mininumValue;
+    NSAssert(minimumValue >= 0, @"JBChartView // the minimumValue must be >= 0.");
+    _minimumValue = minimumValue;
+    _hasMinimumValue = YES;
 }
 
 - (void)setMaximumValue:(CGFloat)maximumValue
 {
     NSAssert(maximumValue >= 0, @"JBChartView // the maximumValue must be >= 0.");
     _maximumValue = maximumValue;
+    _hasMaximumValue = YES;
+}
+
+- (void)resetMinimumValue
+{
+    _hasMinimumValue = NO; // clears min
+}
+
+- (void)resetMaximumValue
+{
+    _hasMaximumValue = NO; // clears max
 }
 
 @end

Classes/JBLineChartView.m

@@ -24,7 +24,8 @@ CGFloat static const kJBLineChartLinesViewMiterLimit = -5.0;
 CGFloat static const kJBLineChartLinesViewDefaultLinePhase = 1.0f;
 CGFloat static const kJBLineChartLinesViewDefaultDimmedOpacity = 0.20f;
 NSInteger static const kJBLineChartLinesViewUnselectedLineIndex = -1;
-CGFloat static const kJBLineChartLinesViewSlopeThreshold = 0.01f;
+CGFloat static const kJBLineChartLinesViewSmoothThresholdSlope = 0.01f;
+NSInteger static const kJBLineChartLinesViewSmoothThresholdVertical = 1;
 
 // Numerics (JBLineChartDotsView)
 NSInteger static const kJBLineChartDotsViewDefaultRadiusFactor = 3; // 3x size of line width
@@ -49,6 +50,13 @@ static UIColor *kJBLineChartViewDefaultDotColor = nil;
 static UIColor *kJBLineChartViewDefaultLineSelectionColor = nil;
 static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 
+@interface JBChartView (Private)
+
+- (BOOL)hasMaximumValue;
+- (BOOL)hasMinimumValue;
+
+@end
+
 @interface JBLineLayer : CAShapeLayer
 
 @property (nonatomic, assign) NSUInteger tag;
@@ -148,8 +156,6 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 // View quick accessors
 - (CGFloat)normalizedHeightForRawHeight:(CGFloat)rawHeight;
 - (CGFloat)availableHeight;
-- (CGFloat)minHeight;
-- (CGFloat)maxHeight;
 - (CGFloat)padding;
 - (NSUInteger)dataCount;
 
@@ -383,8 +389,8 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 
 - (CGFloat)normalizedHeightForRawHeight:(CGFloat)rawHeight
 {
-    CGFloat minHeight = [self minHeight];
-    CGFloat maxHeight = [self maxHeight];
+    CGFloat minHeight = [self minimumValue];
+    CGFloat maxHeight = [self maximumValue];
 
     if ((maxHeight - minHeight) <= 0)
     {
@@ -399,30 +405,12 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
     return self.bounds.size.height - self.headerView.frame.size.height - self.footerView.frame.size.height - self.headerPadding;
 }
 
-- (CGFloat)minHeight
-{
-    if (self.mininumValue != kJBChartViewUndefinedMinimumValue)
-    {
-        return MIN(self.mininumValue, self.cachedMinHeight);
-    }
-    return self.cachedMinHeight;
-}
-
-- (CGFloat)maxHeight
-{
-    if (self.maximumValue != kJBChartViewUndefinedMaximumValue)
-    {
-        return MAX(self.maximumValue, self.cachedMaxHeight);
-    }
-    return self.cachedMaxHeight;
-}
-
 - (CGFloat)padding
 {
     CGFloat maxLineWidth = 0.0f;
     NSAssert([self.dataSource respondsToSelector:@selector(numberOfLinesInLineChartView:)], @"JBLineChartView // dataSource must implement - (NSUInteger)numberOfLinesInLineChartView:(JBLineChartView *)lineChartView");
 
-    for (int lineIndex=0; lineIndex<[self.dataSource numberOfLinesInLineChartView:self]; lineIndex++)
+    for (NSUInteger lineIndex=0; lineIndex<[self.dataSource numberOfLinesInLineChartView:self]; lineIndex++)
     {
         BOOL showsDots = NO;
         if ([self.dataSource respondsToSelector:@selector(lineChartView:showsDotsForLineAtLineIndex:)])
@@ -634,7 +622,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
             } completion:^(BOOL finished) {
                 [UIView animateWithDuration:kJBLineChartViewStateAnimationDuration delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
                     adjustViewFrames();
-                } completion:^(BOOL finished) {
+                } completion:^(BOOL adjustFinished) {
                     if (callback)
                     {
                         callback();
@@ -723,22 +711,22 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
     return _cachedMaxHeight;
 }
 
-- (CGFloat)mininumValue
+- (CGFloat)minimumValue
 {
-    if ([super mininumValue] == kJBChartViewUndefinedMinimumValue)
+    if ([self hasMinimumValue])
     {
-        return self.cachedMinHeight;
+        return fminf(self.cachedMinHeight, [super minimumValue]);
     }
-    return [super mininumValue];
+    return self.cachedMinHeight;
 }
 
 - (CGFloat)maximumValue
 {
-    if ([super maximumValue] == kJBChartViewUndefinedMaximumValue)
+    if ([self hasMaximumValue])
     {
-        return self.cachedMaxHeight;
+        return fmaxf(self.cachedMaxHeight, [super maximumValue]);
     }
-    return [super maximumValue];
+    return self.cachedMaxHeight;
 }
 
 #pragma mark - Touch Helpers
@@ -790,8 +778,8 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 - (NSInteger)lineIndexForPoint:(CGPoint)point
 {
     // Find the horizontal indexes
-    NSInteger leftHorizontalIndex = [self horizontalIndexForPoint:point indexClamp:JBLineChartHorizontalIndexClampLeft];
-    NSInteger rightHorizontalIndex = [self horizontalIndexForPoint:point indexClamp:JBLineChartHorizontalIndexClampRight];
+    NSUInteger leftHorizontalIndex = [self horizontalIndexForPoint:point indexClamp:JBLineChartHorizontalIndexClampLeft];
+    NSUInteger rightHorizontalIndex = [self horizontalIndexForPoint:point indexClamp:JBLineChartHorizontalIndexClampRight];
     
     // Padding
     CGFloat chartPadding = [self padding];
@@ -1053,13 +1041,11 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
         path.miterLimit = kJBLineChartLinesViewMiterLimit;
         
         JBLineChartPoint *previousLineChartPoint = nil;
-        CGFloat previousSlope;
+        CGFloat previousSlope = 0.0f;
         
         NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:smoothLineAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (BOOL)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView smoothLineAtLineIndex:(NSUInteger)lineIndex");
         BOOL smoothLine = [self.delegate lineChartLinesView:self smoothLineAtLineIndex:lineIndex];
-
-        CGFloat nextSlope = 0;
-        CGFloat currentSlope = 0;
+        
         NSUInteger index = 0;
         NSArray *sortedLineData = [lineData sortedArrayUsingSelector:@selector(compare:)];
         for (JBLineChartPoint *lineChartPoint in sortedLineData)
@@ -1070,19 +1056,20 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
             }
             else
             {
-                if (smoothLine == YES)
+                JBLineChartPoint *nextLineChartPoint = nil;
+                if (index != ([lineData count] - 1))
                 {
-                    JBLineChartPoint *nextLineChartPoint = nil;
-                    if (index != ([lineData count] - 1))
-                    {
-                        nextLineChartPoint = [sortedLineData objectAtIndex:(index + 1)];
-                    }
-                    
-                    nextSlope = (nextLineChartPoint != nil) ? ((nextLineChartPoint.position.y - lineChartPoint.position.y)) / ((nextLineChartPoint.position.x - lineChartPoint.position.x)) : previousSlope;
-                    currentSlope = ((lineChartPoint.position.y - previousLineChartPoint.position.y)) / (lineChartPoint.position.x-previousLineChartPoint.position.x);
+                    nextLineChartPoint = [sortedLineData objectAtIndex:(index + 1)];
                 }
-
-                if (smoothLine && ((currentSlope >= (nextSlope + kJBLineChartLinesViewSlopeThreshold)) || (currentSlope <= (nextSlope - kJBLineChartLinesViewSlopeThreshold))))
+                
+                CGFloat nextSlope = (nextLineChartPoint != nil) ? ((nextLineChartPoint.position.y - lineChartPoint.position.y)) / ((nextLineChartPoint.position.x - lineChartPoint.position.x)) : previousSlope;
+                CGFloat currentSlope = ((lineChartPoint.position.y - previousLineChartPoint.position.y)) / (lineChartPoint.position.x-previousLineChartPoint.position.x);
+                
+                BOOL deltaFromNextSlope = ((currentSlope >= (nextSlope + kJBLineChartLinesViewSmoothThresholdSlope)) || (currentSlope <= (nextSlope - kJBLineChartLinesViewSmoothThresholdSlope)));
+                BOOL deltaFromPreviousSlope = ((currentSlope >= (previousSlope + kJBLineChartLinesViewSmoothThresholdSlope)) || (currentSlope <= (previousSlope - kJBLineChartLinesViewSmoothThresholdSlope)));
+                BOOL deltaFromPreviousY = (lineChartPoint.position.y >= previousLineChartPoint.position.y + kJBLineChartLinesViewSmoothThresholdVertical) || (lineChartPoint.position.y <= previousLineChartPoint.position.y - kJBLineChartLinesViewSmoothThresholdVertical);
+                
+                if (smoothLine && deltaFromNextSlope && deltaFromPreviousSlope && deltaFromPreviousY)
                 {
                     CGFloat deltaX = lineChartPoint.position.x - previousLineChartPoint.position.x;
                     CGFloat controlPointX = previousLineChartPoint.position.x + (deltaX / 2);
@@ -1153,12 +1140,14 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 {
     _selectedLineIndex = selectedLineIndex;
     
+    __weak JBLineChartLinesView* weakSelf = self;
+    
     dispatch_block_t adjustLines = ^{
-        for (CALayer *layer in [self.layer sublayers])
+        for (CALayer *layer in [weakSelf.layer sublayers])
         {
             if ([layer isKindOfClass:[JBLineLayer class]])
             {
-                if (((JBLineLayer *)layer).tag == _selectedLineIndex)
+                if (((NSInteger)((JBLineLayer *)layer).tag) == weakSelf.selectedLineIndex)
                 {
                     NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:selectedColorForLineAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (UIColor *)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView selectedColorForLineAtLineIndex:(NSUInteger)lineIndex");
                     ((JBLineLayer *)layer).strokeColor = [self.delegate lineChartLinesView:self selectedColorForLineAtLineIndex:((JBLineLayer *)layer).tag].CGColor;
@@ -1168,7 +1157,7 @@ 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 = (_selectedLineIndex == kJBLineChartLinesViewUnselectedLineIndex) ? 1.0f : kJBLineChartLinesViewDefaultDimmedOpacity;
+                    ((JBLineLayer *)layer).opacity = (weakSelf.selectedLineIndex == kJBLineChartLinesViewUnselectedLineIndex) ? 1.0f : kJBLineChartLinesViewDefaultDimmedOpacity;
                 }
             }
         }
@@ -1291,16 +1280,18 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 {
     _selectedLineIndex = selectedLineIndex;
     
+    __weak JBLineChartDotsView* weakSelf = self;
+    
     dispatch_block_t adjustDots = ^{
-        [self.dotViewsDict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
+        [weakSelf.dotViewsDict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
             NSUInteger horizontalIndex = 0;
             for (JBLineChartDotView *dotView in (NSArray *)obj)
             {
                 if ([key isKindOfClass:[NSNumber class]])
                 {
-                    NSUInteger lineIndex = [((NSNumber *)key) intValue];
+                    NSInteger lineIndex = [((NSNumber *)key) intValue];
 
-                    if (_selectedLineIndex == lineIndex)
+                    if (weakSelf.selectedLineIndex == lineIndex)
                     {
                         NSAssert([self.delegate respondsToSelector:@selector(lineChartDotsView:selectedColorForDotAtHorizontalIndex:atLineIndex:)], @"JBLineChartDotsView // delegate must implement - (UIColor *)lineChartDotsView:(JBLineChartDotsView *)lineChartDotsView selectedColorForDotAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex");
                         dotView.backgroundColor = [self.delegate lineChartDotsView:self selectedColorForDotAtHorizontalIndex:horizontalIndex atLineIndex:lineIndex];
@@ -1309,7 +1300,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
                     {
                         NSAssert([self.delegate respondsToSelector:@selector(lineChartDotsView:colorForDotAtHorizontalIndex:atLineIndex:)], @"JBLineChartDotsView // delegate must implement - (UIColor *)lineChartDotsView:(JBLineChartDotsView *)lineChartDotsView colorForDotAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex");
                         dotView.backgroundColor = [self.delegate lineChartDotsView:self colorForDotAtHorizontalIndex:horizontalIndex atLineIndex:lineIndex];
-                        dotView.alpha = (_selectedLineIndex == kJBLineChartDotsViewUnselectedLineIndex) ? 1.0f : 0.0f; // hide dots on off-selection
+                        dotView.alpha = (weakSelf.selectedLineIndex == kJBLineChartDotsViewUnselectedLineIndex) ? 1.0f : 0.0f; // hide dots on off-selection
                     }
                 }
                 horizontalIndex++;

JBChartView.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "JBChartView"
-  s.version      = "2.4.0"
+  s.version      = "2.5.4"
   s.summary      = "Jawbone's iOS-based charting library for both line and bar graphs."
   s.homepage     = "https://github.com/Jawbone/JBChartView"
 
@@ -10,10 +10,10 @@ Pod::Spec.new do |s|
   s.author       = { "Terry Worona" => "tworona@jawbone.com" }
   s.source       = { 
 	:git => "https://github.com/Jawbone/JBChartView.git",
-	:tag => "v2.4.0"
+	:tag => "v2.5.4"
   }
 
   s.platform     = :ios, '7.0'
-  s.source_files  = 'Classes', 'Classes/**/*.{h,m}'
+  s.source_files = 'Classes/**/*.{h,m}'
   s.requires_arc = true
 end

JBChartViewDemo/JBChartViewDemo/Controllers/JBBarChartViewController.m

@@ -21,7 +21,7 @@ CGFloat const kJBBarChartViewControllerChartHeaderHeight = 80.0f;
 CGFloat const kJBBarChartViewControllerChartHeaderPadding = 10.0f;
 CGFloat const kJBBarChartViewControllerChartFooterHeight = 25.0f;
 CGFloat const kJBBarChartViewControllerChartFooterPadding = 5.0f;
-CGFloat const kJBBarChartViewControllerBarPadding = 1;
+NSUInteger kJBBarChartViewControllerBarPadding = 1;
 NSInteger const kJBBarChartViewControllerNumBars = 12;
 NSInteger const kJBBarChartViewControllerMaxBarHeight = 10;
 NSInteger const kJBBarChartViewControllerMinBarHeight = 5;
@@ -155,11 +155,9 @@ NSString * const kJBBarChartViewControllerNavButtonViewKey = @"view";
     return kJBBarChartViewControllerBarPadding;
 }
 
-- (UIView *)barChartView:(JBBarChartView *)barChartView barViewAtIndex:(NSUInteger)index
+- (UIColor *)barChartView:(JBBarChartView *)barChartView colorForBarViewAtIndex:(NSUInteger)index
 {
-    UIView *barView = [[UIView alloc] init];
-    barView.backgroundColor = (index % 2 == 0) ? kJBColorBarChartBarBlue : kJBColorBarChartBarGreen;
-    return barView;
+    return (index % 2 == 0) ? kJBColorBarChartBarBlue : kJBColorBarChartBarGreen;
 }
 
 - (UIColor *)barSelectionColorForBarChartView:(JBBarChartView *)barChartView

README.md

@@ -38,7 +38,7 @@ Simply add the following line to your <code>Podfile</code>:
 Your Podfile should look something like:
 
 	platform :ios, '7.0'
-	pod 'JBChartView', '~> 2.4.0'
+	pod 'JBChartView', '~> 2.5.4'
 	
 ### The Old School Way
 
@@ -140,6 +140,10 @@ By default, a chart's bars will be black and flat. They can be customized by sup
 	{
 		return ...; // color of line in chart
 	}
+	
+If you don't require a custom UIView, simply supply a color for the bar instead:
+
+	- (UIColor *)barChartView:(JBBarChartView *)barChartView colorForBarViewAtIndex:(NSUInteger)index;
 
 Furthermore, the color of the selection bar (on touch events) can be customized via the <i>optional</i> protocol:
 
@@ -229,6 +233,21 @@ Lastly, a line chart's selection events are delegated back via:
 	}
 	
 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
+
+By default, a chart's minimum and maximum values are equal to the min and max supplied by the dataSource. You can override either value via:
+
+	- (void)setMinimumValue:(CGFloat)minimumValue;
+	- (void)setMaximumValue:(CGFloat)maximumValue;
+
+If value(s) are supplied, they must be >= 0, otherwise an assertion will be thrown. To reset the values back to their original defaults:
+
+	- (void)resetMinimumValue;
+	- (void)resetMaximumValue;
+	
+The min/max values are clamped to the ceiling and floor of the actual min/max values of the chart's data source; for example, if a maximumValue of 20 is supplied & the chart's actual max is 100, then 100 will be used. For min/max modifications to take effect, reloadData must be called.
+
 	
 ## License