readme updates

fixed typo, renamed mininum -> minimum

CHANGELOG.md

@@ -1,5 +1,25 @@
 # Changelog
 
+## <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>.
+
 ## <a href="https://github.com/Jawbone/JBChartView/tree/v2.3.0">2.3.0</a> 
 #### 04/17/14
 - Fixes issue <a href="https://github.com/Jawbone/JBChartView/pull/34">#34</a>.

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;
 
@@ -252,8 +257,8 @@ 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 +269,6 @@ 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 +367,7 @@ 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 +377,28 @@ 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 = 0
+ *  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 +52,12 @@ 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;
 
+- (void)resetMinimumValue; // resets to default (0)
+- (void)resetMaximumValue; // reset to default (chart's data source max value)
+
 /**
  *  Charts can either be expanded or contracted. 
  *  By default, a chart should be expanded on initialization.

Classes/JBChartView.m

@@ -8,15 +8,18 @@
 
 #import "JBChartView.h"
 
+// Numerics
 CGFloat const kJBChartViewDefaultAnimationDuration = 0.25f;
-CGFloat const kJBChartViewUndefinedMinimumValue = -1.0f;
-CGFloat const kJBChartViewUndefinedMaximumValue = -1.0f;
+CGFloat const kJBChartViewDefaulMinimumValue = 0.0f;
 
 // Color (JBChartSelectionView)
 static UIColor *kJBChartVerticalSelectionViewDefaultBgColor = nil;
 
 @interface JBChartView ()
 
+@property (nonatomic, assign) BOOL hasMaximumValue;
+@property (nonatomic, assign) BOOL hasMinimumValue;
+
 // Construction
 - (void)constructChartView;
 
@@ -59,8 +62,7 @@ static UIColor *kJBChartVerticalSelectionViewDefaultBgColor = nil;
 - (void)constructChartView
 {
     self.clipsToBounds = YES;
-    _mininumValue = kJBChartViewUndefinedMinimumValue;
-    _maximumValue = kJBChartViewUndefinedMaximumValue;
+    self.minimumValue = kJBChartViewDefaulMinimumValue;
 }
 
 #pragma mark - Public
@@ -138,16 +140,28 @@ 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
+{
+    self.minimumValue = kJBChartViewDefaulMinimumValue; // resets to default
+}
+
+- (void)resetMaximumValue
+{
+    _hasMaximumValue = NO; // clears max
 }
 
 @end

Classes/JBLineChartView.h

@@ -249,14 +249,14 @@ typedef NS_ENUM(NSInteger, JBLineChartViewLineStyle){
 - (BOOL)lineChartView:(JBLineChartView *)lineChartView showsDotsForLineAtLineIndex:(NSUInteger)lineIndex;
 
 /**
- *  Returns whether or not a line should be smoothed (rounded end caps and connections).
+ *  Returns whether or not a line should be rendered with curved connections and rounded end caps.
  *
  *  Default: NO
  *
  *  @param lineChartView    The line chart object requesting this information.
  *  @param lineIndex        An index number identifying a line in the chart.
  *
- *  @return Whether or not a line should smooth it's ends and connections. 
+ *  @return Whether or not a line should smooth it's connections and end caps.
  */
 - (BOOL)lineChartView:(JBLineChartView *)lineChartView smoothLineAtLineIndex:(NSUInteger)lineIndex;
 

Classes/JBLineChartView.m

@@ -24,6 +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 kJBLineChartLinesViewSmoothThresholdSlope = 0.01f;
+NSInteger static const kJBLineChartLinesViewSmoothThresholdVertical = 1;
 
 // Numerics (JBLineChartDotsView)
 NSInteger static const kJBLineChartDotsViewDefaultRadiusFactor = 3; // 3x size of line width
@@ -48,6 +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;
@@ -147,8 +156,6 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
 // View quick accessors
 - (CGFloat)normalizedHeightForRawHeight:(CGFloat)rawHeight;
 - (CGFloat)availableHeight;
-- (CGFloat)minHeight;
-- (CGFloat)maxHeight;
 - (CGFloat)padding;
 - (NSUInteger)dataCount;
 
@@ -244,7 +251,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
         CGFloat pointSpace = (self.bounds.size.width - (chartPadding * 2)) / ([self dataCount] - 1); // Space in between points
         CGFloat xOffset = chartPadding;
         CGFloat yOffset = 0;
-       
+
         NSMutableArray *mutableChartData = [NSMutableArray array];
         NSAssert([self.dataSource respondsToSelector:@selector(numberOfLinesInLineChartView:)], @"JBLineChartView // dataSource must implement - (NSUInteger)numberOfLinesInLineChartView:(JBLineChartView *)lineChartView");
         for (NSUInteger lineIndex=0; lineIndex<[self.dataSource numberOfLinesInLineChartView:self]; lineIndex++)
@@ -253,7 +260,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
             NSUInteger dataCount = [self.dataSource lineChartView:self numberOfVerticalValuesAtLineIndex:lineIndex];
             NSMutableArray *chartPointData = [NSMutableArray array];
             for (NSUInteger horizontalIndex=0; horizontalIndex<dataCount; horizontalIndex++)
-            {                
+            {               
                 NSAssert([self.delegate respondsToSelector:@selector(lineChartView:verticalValueForHorizontalIndex:atLineIndex:)], @"JBLineChartView // delegate must implement - (CGFloat)lineChartView:(JBLineChartView *)lineChartView verticalValueForHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex");
                 CGFloat rawHeight =  [self.delegate lineChartView:self verticalValueForHorizontalIndex:horizontalIndex atLineIndex:lineIndex];
                 NSAssert(rawHeight >= 0, @"JBLineChartView // delegate function - (CGFloat)lineChartView:(JBLineChartView *)lineChartView verticalValueForHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex must return a CGFloat >= 0");
@@ -288,7 +295,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
         // Create new line and overlay subviews
         self.linesView = [[JBLineChartLinesView alloc] initWithFrame:CGRectOffset(mainViewRect, 0, self.headerView.frame.size.height + self.headerPadding)];
         self.linesView.delegate = self;
-        
+
         // Add new lines view
         if (self.footerView)
         {
@@ -382,8 +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)
     {
@@ -398,24 +405,6 @@ 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;
@@ -508,15 +497,6 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
     return [self padding];
 }
 
-- (BOOL)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView smoothLineAtLineIndex:(NSUInteger)lineIndex
-{
-    if ([self.dataSource respondsToSelector:@selector(lineChartView:smoothLineAtLineIndex:)])
-    {
-        return [self.dataSource lineChartView:self smoothLineAtLineIndex:lineIndex];
-    }
-    return NO;
-}
-
 - (JBLineChartViewLineStyle)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView lineStyleForLineAtLineIndex:(NSUInteger)lineIndex
 {
     if ([self.dataSource respondsToSelector:@selector(lineChartView:lineStyleForLineAtLineIndex:)])
@@ -526,6 +506,15 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
     return JBLineChartViewLineStyleSolid;
 }
 
+- (BOOL)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView smoothLineAtLineIndex:(NSUInteger)lineIndex
+{
+    if ([self.dataSource respondsToSelector:@selector(lineChartView:smoothLineAtLineIndex:)])
+    {
+        return [self.dataSource lineChartView:self smoothLineAtLineIndex:lineIndex];
+    }
+    return NO;
+}
+
 #pragma mark - JBLineChartDotsViewDelegate
 
 - (NSArray *)chartDataForLineChartDotsView:(JBLineChartDotsView*)lineChartDotsView
@@ -722,22 +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
@@ -1051,8 +1040,15 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
         UIBezierPath *path = [UIBezierPath bezierPath];
         path.miterLimit = kJBLineChartLinesViewMiterLimit;
         
+        JBLineChartPoint *previousLineChartPoint = nil;
+        CGFloat previousSlope;
+        
+        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];
+        
         NSUInteger index = 0;
-        for (JBLineChartPoint *lineChartPoint in [lineData sortedArrayUsingSelector:@selector(compare:)])
+        NSArray *sortedLineData = [lineData sortedArrayUsingSelector:@selector(compare:)];
+        for (JBLineChartPoint *lineChartPoint in sortedLineData)
         {
             if (index == 0)
             {
@@ -1060,9 +1056,37 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
             }
             else
             {
-                [path addLineToPoint:CGPointMake(lineChartPoint.position.x, fmin(self.bounds.size.height - padding, fmax(padding, lineChartPoint.position.y)))];
+                JBLineChartPoint *nextLineChartPoint = nil;
+                if (index != ([lineData count] - 1))
+                {
+                    nextLineChartPoint = [sortedLineData objectAtIndex:(index + 1)];
+                }
+                
+                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);
+                    
+                    CGPoint controlPoint1 = CGPointMake(controlPointX, previousLineChartPoint.position.y);
+                    CGPoint controlPoint2 = CGPointMake(controlPointX, lineChartPoint.position.y);
+                    
+                    [path addCurveToPoint:CGPointMake(lineChartPoint.position.x, fmin(self.bounds.size.height - padding, fmax(padding, lineChartPoint.position.y))) controlPoint1:controlPoint1 controlPoint2:controlPoint2];
+                }
+                else
+                {
+                    [path addLineToPoint:CGPointMake(lineChartPoint.position.x, fmin(self.bounds.size.height - padding, fmax(padding, lineChartPoint.position.y)))];
+                }
+                
+                previousSlope = currentSlope;
             }
-            
+            previousLineChartPoint = lineChartPoint;
             index++;
         }
         
@@ -1079,9 +1103,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
         NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:colorForLineAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (UIColor *)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView colorForLineAtLineIndex:(NSUInteger)lineIndex");
         shapeLayer.strokeColor = [self.delegate lineChartLinesView:self colorForLineAtLineIndex:lineIndex].CGColor;
         
-        NSAssert([self.delegate respondsToSelector:@selector(lineChartLinesView:smoothLineAtLineIndex:)], @"JBLineChartLinesView // delegate must implement - (UIColor *)lineChartLinesView:(JBLineChartLinesView *)lineChartLinesView colorForLineAtLineIndex:(NSUInteger)lineIndex");
-        BOOL smoothLine = [self.delegate lineChartLinesView:self smoothLineAtLineIndex:lineIndex];
-        if (smoothLine)
+        if (smoothLine == YES)
         {
             shapeLayer.lineCap = kCALineCapRound;
             shapeLayer.lineJoin = kCALineJoinRound;
@@ -1228,7 +1250,7 @@ static UIColor *kJBLineChartViewDefaultDotSelectionColor = nil;
             NSMutableArray *mutableDotViews = [NSMutableArray array];
             NSUInteger horizontalIndex = 0;
             for (JBLineChartPoint *lineChartPoint in [lineData sortedArrayUsingSelector:@selector(compare:)])
-            {                
+            {                               
                 NSAssert([self.delegate respondsToSelector:@selector(lineChartDotsView:dotRadiusForLineAtLineIndex:)], @"JBLineChartDotsView // delegate must implement - (CGFloat)lineChartDotsView:(JBLineChartDotsView *)lineChartDotsView dotRadiusForLineAtLineIndex:(NSUInteger)lineIndex");
                 CGFloat dotRadius = [self.delegate lineChartDotsView:self dotRadiusForLineAtLineIndex:lineIndex];
                 

JBChartView.podspec

@@ -1,17 +1,19 @@
 Pod::Spec.new do |s|
   s.name         = "JBChartView"
-  s.version      = "2.3.0"
+  s.version      = "2.5.0"
   s.summary      = "Jawbone's iOS-based charting library for both line and bar graphs."
   s.homepage     = "https://github.com/Jawbone/JBChartView"
 
+  s.screenshot   = "https://raw.github.com/Jawbone/JBChartView/master/Screenshots/main.png"
+
   s.license      = { :type => 'Apache', :file => 'LICENSE' }
   s.author       = { "Terry Worona" => "tworona@jawbone.com" }
   s.source       = { 
 	:git => "https://github.com/Jawbone/JBChartView.git",
-	:tag => "v2.3.0"
+	:tag => "v2.5.0"
   }
 
   s.platform     = :ios, '7.0'
-  s.source_files  = 'Classes', 'Classes/**/*.{h,m}'
+  s.source_files = 'Classes/**/*.{h,m}'
   s.requires_arc = true
 end

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', '~> 2.3.0'
+	pod 'JBChartView', '~> 2.5.0'
 	
 ### The Old School Way
 
@@ -212,7 +212,7 @@ To customize the color of each dot during selection and non-selection events (de
 
 	- (UIColor *)lineChartView:(JBLineChartView *)lineChartView selectionColorForDotAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
 	
-As well, by default, each line will have squared off end caps and connection points. To enable line smoothing:
+As well, by default, each line will have squared off end caps and connection points. To enable rounded connections and end caps:
 
 	- (BOOL)lineChartView:(JBLineChartView *)lineChartView smoothLineAtLineIndex:(NSUInteger)lineIndex;
 		
@@ -229,6 +229,21 @@ 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 value (y-axis) is equal to 0. The maximum is equal to the max value 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