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- // HCSStarRatingView.m
- //
- // Copyright (c) 2015 Hugo Sousa
- //
- // Permission is hereby granted, free of charge, to any person obtaining a copy
- // of this software and associated documentation files (the "Software"), to deal
- // in the Software without restriction, including without limitation the rights
- // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the Software is
- // furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be included in
- // all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- // THE SOFTWARE.
- #import "HCSStarRatingView.h"
- @implementation HCSStarRatingView {
- NSUInteger _minimumValue;
- NSUInteger _maximumValue;
- CGFloat _value;
- NSUInteger _previousValue;
- }
- @dynamic minimumValue;
- @dynamic maximumValue;
- @dynamic value;
- #pragma mark - Initialization
- - (instancetype)initWithFrame:(CGRect)frame {
- self = [super initWithFrame:frame];
- if (self) {
- [self _customInit];
- }
- return self;
- }
- - (id)initWithCoder:(NSCoder *)aDecoder {
- self = [super initWithCoder:aDecoder];
- if (self) {
- [self _customInit];
- }
- return self;
- }
- - (void)_customInit {
- self.backgroundColor = [UIColor clearColor];
- self.exclusiveTouch = YES;
- _minimumValue = 1;
- _maximumValue = 5;
- _value = 0;
- _spacing = 5.f;
- }
- #pragma mark - Properties
- - (NSUInteger)minimumValue {
- return MAX(_minimumValue, 0);
- }
- - (void)setMinimumValue:(NSUInteger)minimumValue {
- if (_minimumValue != minimumValue) {
- _minimumValue = minimumValue;
- [self setNeedsDisplay];
- }
- }
- - (NSUInteger)maximumValue {
- return MAX(_minimumValue, _maximumValue);
- }
- - (void)setMaximumValue:(NSUInteger)maximumValue {
- if (_maximumValue != maximumValue) {
- _maximumValue = maximumValue;
- [self setNeedsDisplay];
- [self invalidateIntrinsicContentSize];
- }
- }
- - (CGFloat)value {
- return MIN(MAX(_value, _minimumValue), _maximumValue);
- }
- - (void)setValue:(CGFloat)value {
- if (_value != value) {
- _value = value;
- [self sendActionsForControlEvents:UIControlEventValueChanged];
- [self setNeedsDisplay];
- }
- }
- - (void)setSpacing:(CGFloat)spacing {
- _spacing = MAX(spacing, 0);
- [self setNeedsDisplay];
- }
- - (void)setAllowsHalfStars:(BOOL)allowsHalfStars {
- if (_allowsHalfStars != allowsHalfStars) {
- _allowsHalfStars = allowsHalfStars;
- [self setNeedsDisplay];
- }
- }
- #pragma mark - Drawing
- - (void)_drawStarWithFrame:(CGRect)frame tintColor:(UIColor*)tintColor highlighted:(BOOL)highlighted {
- UIBezierPath* starShapePath = UIBezierPath.bezierPath;
- [starShapePath moveToPoint: CGPointMake(CGRectGetMinX(frame) + 0.62723 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.37309 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.50000 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.02500 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.37292 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.37309 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.02500 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.39112 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.30504 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.62908 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.20642 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.97500 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.50000 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.78265 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.79358 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.97500 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.69501 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.62908 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.97500 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.39112 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.62723 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.37309 * CGRectGetHeight(frame))];
- [starShapePath closePath];
- starShapePath.miterLimit = 4;
-
- if (highlighted) {
- [tintColor setFill];
- [starShapePath fill];
- }
-
- [tintColor setStroke];
- starShapePath.lineWidth = 1;
- [starShapePath stroke];
- }
- - (void)_drawHalfStarWithFrame:(CGRect)frame tintcolor:(UIColor *)tintColor highlighted:(BOOL)highlighted {
- UIBezierPath* starShapePath = UIBezierPath.bezierPath;
- [starShapePath moveToPoint: CGPointMake(CGRectGetMinX(frame) + 0.50000 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.02500 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.37292 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.37309 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.02500 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.39112 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.30504 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.62908 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.20642 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.97500 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.50000 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.78265 * CGRectGetHeight(frame))];
- [starShapePath addLineToPoint: CGPointMake(CGRectGetMinX(frame) + 0.50000 * CGRectGetWidth(frame), CGRectGetMinY(frame) + 0.02500 * CGRectGetHeight(frame))];
- [starShapePath closePath];
- starShapePath.miterLimit = 4;
-
- if (highlighted) {
- [tintColor setFill];
- [starShapePath fill];
- }
-
- [tintColor setStroke];
- starShapePath.lineWidth = 1;
- [starShapePath stroke];
- }
- - (void)drawRect:(CGRect)rect {
- CGContextRef context = UIGraphicsGetCurrentContext();
- CGContextSetFillColorWithColor(context, self.backgroundColor.CGColor);
- CGContextFillRect(context, rect);
-
- CGFloat availableWidth = rect.size.width - (_spacing * (_maximumValue + 1));
- CGFloat cellWidth = (availableWidth / _maximumValue);
- CGFloat starSide = (cellWidth <= rect.size.height) ? cellWidth : rect.size.height;
- for (int idx = 0; idx < _maximumValue; idx++) {
- CGPoint center = CGPointMake(cellWidth*idx + cellWidth/2 + _spacing*(idx+1), rect.size.height/2);
- CGRect frame = CGRectMake(center.x - starSide/2, center.y - starSide/2, starSide, starSide);
- BOOL highlighted = (idx+1 <= ceilf(_value));
- BOOL halfStar = highlighted ? (idx+1 > _value) : NO;
- if (halfStar && _allowsHalfStars) {
- [self _drawStarWithFrame:frame tintColor:self.tintColor highlighted:NO];
- [self _drawHalfStarWithFrame:frame tintcolor:self.tintColor highlighted:highlighted];
- } else {
- [self _drawStarWithFrame:frame tintColor:self.tintColor highlighted:highlighted];
- }
- }
- }
- - (void)setNeedsLayout {
- [super setNeedsLayout];
- [self setNeedsDisplay];
- }
- #pragma mark - Touches
- - (BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
- [super beginTrackingWithTouch:touch withEvent:event];
- if (![self isFirstResponder]) {
- [self becomeFirstResponder];
- }
- _previousValue = _value;
- [self _handleTouch:touch];
- return YES;
- }
- - (BOOL)continueTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
- [super continueTrackingWithTouch:touch withEvent:event];
- [self _handleTouch:touch];
- return YES;
- }
- - (void)endTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
- [super endTrackingWithTouch:touch withEvent:event];
- if ([self isFirstResponder]) {
- [self resignFirstResponder];
- }
- [self _handleTouch:touch];
- if (_value != _previousValue) {
- [self sendActionsForControlEvents:UIControlEventValueChanged];
- }
- }
- - (void)cancelTrackingWithEvent:(UIEvent *)event {
- [super cancelTrackingWithEvent:event];
- if ([self isFirstResponder]) {
- [self resignFirstResponder];
- }
- }
- - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
- return !self.isUserInteractionEnabled;
- }
- - (void)_handleTouch:(UITouch *)touch {
- CGFloat cellWidth = self.bounds.size.width / _maximumValue;
- CGPoint location = [touch locationInView:self];
- CGFloat value = location.x / cellWidth;
- if (_allowsHalfStars && value+.5f < ceilf(value)) {
- _value = floor(value)+.5f;
- } else {
- _value = ceilf(value);
- }
- [self setNeedsDisplay];
- }
- #pragma mark - First responder
- - (BOOL)canBecomeFirstResponder {
- return YES;
- }
- #pragma mark - Intrinsic Content Size
- - (CGSize)intrinsicContentSize {
- CGFloat height = 44.f;
- return CGSizeMake(_maximumValue * height + (_maximumValue+1) * _spacing, height);
- }
- @end
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