Merge pull request #250 from pkclsoft/master

Enhancements to Bar and Line Charts

@@ -26,6 +26,9 @@
 @property (nonatomic) CAShapeLayer *gradeLayer;
 @property (nonatomic) CATextLayer* textLayer;
 
+/** Text color for all bars in the chart. */
+@property (nonatomic) UIColor * labelTextColor;
+
 @property (nonatomic, assign) BOOL isNegative;          //!< 是否是负数
 @property (nonatomic, assign) BOOL isShowNumber;        //!< 是否显示numbers
 @end

@@ -181,7 +181,7 @@
         _textLayer = [[CATextLayer alloc]init];
         [_textLayer setString:@"0"];
         [_textLayer setAlignmentMode:kCAAlignmentCenter];
-        [_textLayer setForegroundColor:[[UIColor colorWithRed:178/255.0 green:178/255. blue:178/255.0 alpha:1.0] CGColor]];
+        [_textLayer setForegroundColor:[_labelTextColor CGColor]];
        _textLayer.hidden = YES;
 
     }
@@ -189,6 +189,11 @@
     return _textLayer;
 }
 
+- (void) setLabelTextColor:(UIColor *)labelTextColor {
+    _labelTextColor = labelTextColor;
+    [_textLayer setForegroundColor:[_labelTextColor CGColor]];
+}
+
 -(void)setGradeFrame:(CGFloat)grade startPosY:(CGFloat)startPosY
 {
     CGFloat textheigt = self.bounds.size.height*self.grade;

@@ -63,6 +63,8 @@ typedef NSString *(^PNYLabelFormatter)(CGFloat yLabelValue);
 /** Controls whether the chart border line should be displayed. */
 @property (nonatomic) BOOL showChartBorder;
 
+@property (nonatomic) UIColor *chartBorderColor;
+
 /** Controls whether the chart Horizontal separator should be displayed. */
 @property (nonatomic, assign) BOOL showLevelLine;
 

@@ -62,6 +62,7 @@
     _chartMarginBottom   = 25.0;
     _barRadius           = 2.0;
     _showChartBorder     = NO;
+    _chartBorderColor    = PNLightGrey;
     _showLevelLine       = NO;
     _yChartLabelWidth    = 18;
     _rotateForXAxisText  = false;
@@ -234,7 +235,7 @@
             }
 
             bar = [[PNBar alloc] initWithFrame:CGRectMake(barXPosition, //Bar X position
-                                                          self.frame.size.height - chartCavanHeight - kXLabelHeight - _chartMarginTop , //Bar Y position
+                                                          self.frame.size.height - chartCavanHeight - kXLabelHeight - _chartMarginBottom + _chartMarginTop , //Bar Y position
                                                           barWidth, // Bar witdh
                                                           self.showLevelLine ? chartCavanHeight/2.0:chartCavanHeight)]; //Bar height
 
@@ -250,6 +251,10 @@
                 bar.barColor = [self barColorAtIndex:index];
             }
             
+            if (self.labelTextColor) {
+                bar.labelTextColor = self.labelTextColor;
+            }
+
             // Add gradient
             if (self.isGradientShow) {
              bar.barColorGradientStart = bar.barColor;
@@ -309,13 +314,13 @@
 
         UIBezierPath *progressline = [UIBezierPath bezierPath];
 
-        [progressline moveToPoint:CGPointMake(_chartMarginLeft, self.frame.size.height - kXLabelHeight - _chartMarginTop)];
-        [progressline addLineToPoint:CGPointMake(self.frame.size.width - _chartMarginRight,  self.frame.size.height - kXLabelHeight - _chartMarginTop)];
+        [progressline moveToPoint:CGPointMake(_chartMarginLeft, self.frame.size.height - kXLabelHeight - _chartMarginBottom + _chartMarginTop)];
+        [progressline addLineToPoint:CGPointMake(self.frame.size.width - _chartMarginRight,  self.frame.size.height - kXLabelHeight - _chartMarginBottom + _chartMarginTop)];
 
         [progressline setLineWidth:1.0];
         [progressline setLineCapStyle:kCGLineCapSquare];
         _chartBottomLine.path = progressline.CGPath;
-        _chartBottomLine.strokeColor = PNLightGrey.CGColor;
+        _chartBottomLine.strokeColor = [_chartBorderColor CGColor];;
 
         CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
         pathAnimation.duration = 0.5;
@@ -344,7 +349,7 @@
         [progressLeftline setLineWidth:1.0];
         [progressLeftline setLineCapStyle:kCGLineCapSquare];
         _chartLeftLine.path = progressLeftline.CGPath;
-        _chartLeftLine.strokeColor = PNLightGrey.CGColor;
+        _chartLeftLine.strokeColor = [_chartBorderColor CGColor];
 
         CABasicAnimation *pathLeftAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
         pathLeftAnimation.duration = 0.5;

@@ -45,11 +45,14 @@
 @property (nonatomic) UIColor *yLabelColor;
 @property (nonatomic) CGFloat chartCavanHeight;
 @property (nonatomic) CGFloat chartCavanWidth;
-@property (nonatomic) CGFloat chartMargin;
 @property (nonatomic) BOOL showLabel;
 @property (nonatomic) BOOL showGenYLabels;
 @property (nonatomic) BOOL thousandsSeparator;
 
+@property (nonatomic) CGFloat chartMarginLeft;
+@property (nonatomic) CGFloat chartMarginRight;
+@property (nonatomic) CGFloat chartMarginTop;
+@property (nonatomic) CGFloat chartMarginBottom;
 
 /**
  * Controls whether to show the coordinate axis. Default is NO.

@@ -25,6 +25,11 @@ typedef PNLineChartDataItem *(^LCLineChartDataGetter)(NSUInteger item);
 @property (copy) LCLineChartDataGetter getData;
 @property (strong, nonatomic) NSString *dataTitle;
 
+@property (nonatomic) BOOL showPointLabel;
+@property (nonatomic) UIColor *pointLabelColor;
+@property (nonatomic) UIFont *pointLabelFont;
+@property (nonatomic) NSString *pointLabelFormat;
+
 @property (nonatomic, assign) PNLineChartPointStyle inflexionPointStyle;
 
 /**

@@ -23,6 +23,9 @@
     _inflexionPointWidth = 6.f;
     _lineWidth = 2.f;
     _alpha = 1.f;
+    _showPointLabel = NO;
+    _pointLabelColor = [UIColor blackColor];
+    _pointLabelFormat = @"%1.f";
 }
 
 @end

@@ -9,7 +9,9 @@
 @interface PNLineChartDataItem : NSObject
 
 + (PNLineChartDataItem *)dataItemWithY:(CGFloat)y;
++ (PNLineChartDataItem *)dataItemWithY:(CGFloat)y andRawY:(CGFloat)rawY;
 
 @property (readonly) CGFloat y; // should be within the y range
+@property (readonly) CGFloat rawY; // this is the raw value, used for point label.
 
 @end

@@ -7,9 +7,10 @@
 
 @interface PNLineChartDataItem ()
 
-- (id)initWithY:(CGFloat)y;
+- (id)initWithY:(CGFloat)y andRawY:(CGFloat)rawY;
 
 @property (readwrite) CGFloat y;    // should be within the y range
+@property (readwrite) CGFloat rawY; // this is the raw value, used for point label.
 
 @end
 
@@ -17,13 +18,18 @@
 
 + (PNLineChartDataItem *)dataItemWithY:(CGFloat)y
 {
-    return [[PNLineChartDataItem alloc] initWithY:y];
+    return [[PNLineChartDataItem alloc] initWithY:y andRawY:y];
 }
 
-- (id)initWithY:(CGFloat)y
++ (PNLineChartDataItem *)dataItemWithY:(CGFloat)y andRawY:(CGFloat)rawY {
+    return [[PNLineChartDataItem alloc] initWithY:y andRawY:rawY];
+}
+
+- (id)initWithY:(CGFloat)y andRawY:(CGFloat)rawY
 {
     if ((self = [super init])) {
         self.y = y;
+        self.rawY = rawY;
     }
 
     return self;