Add ability to resize the star image on iOS

EDStarRating.podspec

@@ -3,7 +3,7 @@ Pod::Spec.new do |s|
   s.version      = "1.1"
   s.summary      = "A configurable star rating control for OSX and iOS, similar to those found in iTunes and the App Store."
   s.ios.frameworks  = 'CoreGraphics'
-  s.ios.deployment_target = '4.3'
+  s.ios.deployment_target = '8.0'
   s.osx.deployment_target = '10.6'
   s.description  = <<-DESC
                 A configurable star rating control for OSX and iOS, similar to those found in iTunes and the App Store.

EDStarRating/EDStarRating.h

@@ -54,12 +54,16 @@ typedef UIImage     EDImage;
 @property (nonatomic,strong) EDImage *backgroundImage;
 @property (nonatomic,strong) EDImage *starHighlightedImage;
 @property (nonatomic,strong) EDImage *starImage;
+@property (nonatomic) NSInteger minRating;
 @property (nonatomic) NSInteger maxRating;
 @property (nonatomic) float rating;
 @property (nonatomic) CGFloat horizontalMargin;
 @property (nonatomic) BOOL editable;
 @property (nonatomic) EDStarRatingDisplayMode displayMode;
 @property (nonatomic) float halfStarThreshold;
+#if EDSTAR_IOS
+@property (nonatomic) NSInteger starSize;
+#endif
 
 @property (nonatomic,weak) id<EDStarRatingProtocol> delegate;
 @property (nonatomic,copy) EDStarRatingReturnBlock returnBlock;

EDStarRating/EDStarRating.m

@@ -6,7 +6,9 @@
 //  Distributed under MIT license
 
 #import "EDStarRating.h"
-
+#if EDSTAR_IOS
+#import <QuartzCore/QuartzCore.h>
+#endif
 #define ED_DEFAULT_HALFSTAR_THRESHOLD   0.6
 
 
@@ -18,16 +20,20 @@ @interface EDStarRating()
 
 
 @implementation EDStarRating
-@synthesize starImage;
-@synthesize starHighlightedImage;
+@synthesize starImage = _starImage;
+@synthesize starHighlightedImage = _starHighlightedImage;
 @synthesize rating=_rating;
+@synthesize minRating;
 @synthesize maxRating;
 @synthesize backgroundImage;
 @synthesize editable;
 @synthesize delegate=_delegate;
 @synthesize horizontalMargin;
 @synthesize halfStarThreshold;
 @synthesize displayMode;
+#if EDSTAR_IOS
+@synthesize starSize=_starSize;
+#endif
 #if EDSTAR_MACOSX
 @synthesize backgroundColor=_backgroundColor;
 #endif
@@ -39,9 +45,10 @@ @implementation EDStarRating
 
 -(void)setDefaultProperties
 {
-    maxRating=5.0;
-    _rating=0.0;
-    horizontalMargin=10.0;
+    minRating = 1.0;
+    maxRating = 5.0;
+    _rating = 0.0;
+    horizontalMargin = 10.0;
     displayMode = EDStarRatingDisplayFull;
     halfStarThreshold=ED_DEFAULT_HALFSTAR_THRESHOLD;
     [self setBackgroundColor:[EDColor clearColor]];
@@ -110,11 +117,23 @@ -(void)setDisplayMode:(EDStarRatingDisplayMode)dispMode
     [self setNeedsDisplay];
 }
 
+#if EDSTAR_IOS
+-(void)setStarSize:(NSInteger)starSize
+{
+    _starSize = starSize;
+    if(_starSize != 0 && self.starImage != nil && self.starHighlightedImage != nil){
+        self.starImage = [self resizeImageToSize:CGSizeMake(_starSize, _starSize) withImage:self.starImage];
+        self.starHighlightedImage = [self resizeImageToSize:CGSizeMake(_starSize, _starSize) withImage:self.starHighlightedImage];
+    }
+    [self setNeedsDisplay];
+}
+#endif
+
 #pragma mark -
 #pragma mark Drawing
 -(CGPoint)pointOfStarAtPosition:(NSInteger)position highlighted:(BOOL)hightlighted
 {
-    CGSize size = hightlighted?starHighlightedImage.size:starImage.size;
+    CGSize size = hightlighted?_starHighlightedImage.size:_starImage.size;
 
     NSInteger starsSpace = self.bounds.size.width - 2*horizontalMargin;
 
@@ -220,7 +239,7 @@ -(void)drawRect:(CGRect)rect
     }
 
     // Draw rating Images
-    CGSize starSize = starHighlightedImage.size;
+    CGSize starSize = _starHighlightedImage.size;
     for( NSInteger i=0 ; i<maxRating; i++ )
     {
         [self drawImage:self.tintedStarImage atPosition:i];
@@ -284,6 +303,11 @@ -(float) starsForPoint:(CGPoint)point
             stars+=increment;
         }
     }
+
+    if(stars < minRating){
+        stars = minRating;
+    }
+
     return stars;
 }
 
@@ -296,7 +320,6 @@ -(void)mouseDown:(NSEvent *)theEvent
     if ([theEvent type] == NSLeftMouseDown) {
 
         NSPoint pointInView   = [self convertPoint:[theEvent locationInWindow] fromView:nil];
-
         self.rating = [self starsForPoint:pointInView];
         [self setNeedsDisplay];
     }
@@ -310,7 +333,7 @@ -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
 
     UITouch *touch = [touches anyObject];
     CGPoint touchLocation = [touch locationInView:self];
-    self.rating =[self starsForPoint:touchLocation];
+    self.rating = [self starsForPoint:touchLocation];
     [self setNeedsDisplay];
 }
 #endif
@@ -360,22 +383,29 @@ - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
 #pragma mark - Tint color Support
 -(void)setStarImage:(EDImage *)image
 {
-    if( starImage == image)
+    if( _starImage == image)
         return;
 
-    starImage = image;
+    _starImage = image;
+    if(_starSize != 0){
+        _starImage = [self resizeImageToSize:CGSizeMake(_starSize, _starSize) withImage:_starImage];
+    }
     self.tintedStarImage = [self tintedImage:image];
 }
 
 -(void)setStarHighlightedImage:(EDImage *)image
 {
-    if( starHighlightedImage == image )
+    if( _starHighlightedImage == image )
         return;
 
-    starHighlightedImage = image;
+    _starHighlightedImage = image;
+    if(_starSize != 0){
+        _starHighlightedImage = [self resizeImageToSize:CGSizeMake(_starSize, _starSize) withImage:_starHighlightedImage];
+    }
     self.tintedStarHighlightedImage = [self tintedImage:image];
 
 }
+
 -(EDImage*)tintedImage:(EDImage*)img
 {
     EDImage *tintedImage = img;
@@ -412,4 +442,67 @@ -(void)tintColorDidChange
 }
 #endif
 
+#pragma mark -
+#pragma mark Helper methods
+
+#if EDSTAR_IOS
+- (UIImage *)resizeImageToSize:(CGSize)targetSize withImage:(UIImage*)image
+{
+    UIImage *sourceImage = image;
+    UIImage *newImage = nil;
+
+    CGSize imageSize = sourceImage.size;
+    CGFloat width = imageSize.width;
+    CGFloat height = imageSize.height;
+
+    CGFloat targetWidth = targetSize.width;
+    CGFloat targetHeight = targetSize.height;
+
+    CGFloat scaleFactor = 0.0;
+    CGFloat scaledWidth = targetWidth;
+    CGFloat scaledHeight = targetHeight;
+
+    CGPoint thumbnailPoint = CGPointMake(0.0,0.0);
+
+    if (CGSizeEqualToSize(imageSize, targetSize) == NO) {
+
+        CGFloat widthFactor = targetWidth / width;
+        CGFloat heightFactor = targetHeight / height;
+
+        if (widthFactor < heightFactor)
+            scaleFactor = widthFactor;
+        else
+            scaleFactor = heightFactor;
+
+        scaledWidth  = width * scaleFactor;
+        scaledHeight = height * scaleFactor;
+
+        // make image center aligned
+        if (widthFactor < heightFactor)
+        {
+            thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
+        }
+        else if (widthFactor > heightFactor)
+        {
+            thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
+        }
+    }
+
+    UIGraphicsBeginImageContext(targetSize);
+    CGRect thumbnailRect = CGRectZero;
+    thumbnailRect.origin = thumbnailPoint;
+    thumbnailRect.size.width  = scaledWidth;
+    thumbnailRect.size.height = scaledHeight;
+
+    [sourceImage drawInRect:thumbnailRect];
+    newImage = UIGraphicsGetImageFromCurrentImageContext();
+    UIGraphicsEndImageContext();
+
+    if(newImage == nil)
+        NSLog(@"Could not scale image");
+
+    return newImage ;
+}
+#endif
+
 @end

README.md

@@ -1,20 +1,20 @@
 EDStarRating  ![Version Badge](https://go-shields.herokuapp.com/license-BSD-blue.png)
 ===============
 
-A configurable star rating control for OSX and iOS, similar to those found in iTunes and the App Store.
+A configurable star rating control for OSX and iOS, similar to those found in iTunes and the App Store. Fork of https://github.com/erndev/EDStarRating including support for resizing large star images on iOS. Additionally I have rewritten the iOS sample project with the additional presentation of the resizing code.
 
 [![Badge w/ Version](https://cocoapod-badges.herokuapp.com/v/EDStarRating/badge.png)](https://cocoadocs.org/docsets/EDStarRating)
 [![Badge w/ Platform](https://cocoapod-badges.herokuapp.com/p/EDStarRating/badge.svg)](https://cocoadocs.org/docsets/EDStarRating)
 
 ###Installation
 
-The easiest way to install EDStarRating is via [CocoaPods](http://cocoapods.org). Add this line to your Podfile:
+The easiest way to install this fork of EDStarRating is via [CocoaPods](http://cocoapods.org). Add this line to your Podfile:
 
 ```ruby
-pod 'EDStarRating'
+pod 'EDStarRating', :git => 'https://github.com/martinpfannemueller/EDStarRating.git'
 ```
 
-and run `pod install`. 
+and run `pod install`.
 
 You can also install it manually by copying these two files to your project: EDStarRating.h and EDStarRating.m
 
@@ -24,10 +24,11 @@ You can also install it manually by copying these two files to your project: EDS
 
 Example:
 
-```
+```objective-c
 
   starRating.starImage = [NSImage imageNamed:@"star.png"];
   starRating.starHighlightedImage = [NSImage imageNamed:@"starhighlighted.png"];
+  starRating.minRating = 1.0; // Prevents ratings below a minimum
   starRating.maxRating = 5.0;
   starRating.delegate = self;
   starRating.horizontalMargin = 12;
@@ -37,6 +38,9 @@ Example:
 
   starRating.rating= 2.5;
 
+  // Resizing of large star image by setting starSize property
+  starRating.starSize = 20;
+
 ```
 ### tintColor support in iOS 7
 If you pass to the control a template UIImage (created using rendering mode (UIImageRenderingModeAlwaysTemplate), EDStarRating will tint that image using the control's tintColor property.
@@ -45,12 +49,12 @@ If you pass to the control a template UIImage (created using rendering mode (UII
 ### Compatiblity
 This control should work in ARC and not ARC projects. On OS X 10.6+ and iOS 4.x+.
 But it's only tested it with ARC enabled in 10.8+ and iOS 6.0+. Let me now if it works fine for you in other environments.
-  
+
 
 ### Screenshots
 
 ![EDStarRating](https://github.com/erndev/EDStarRating/raw/master/edstarrating.png)
-![EDStarRating](https://github.com/erndev/EDStarRating/raw/master/edstarrating-ios.png)
+![EDStarRating](https://raw.githubusercontent.com/martinpfannemueller/EDStarRating/master/edstarrating-ios.png)
 
 ### License
 BSD License.
@@ -80,5 +84,5 @@ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ### Star icons
-The star icons and backgrounds used in the sample have been created by [Dan Deming-Henes
+The star icons and backgrounds taken from the original project used in the sample have been created by [Dan Deming-Henes
 ](http://strandeddesign.com).