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Support for track background images on lower and upper sides. #78

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Support for track background images on lower and upper sides. #78

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6 changes: 6 additions & 0 deletions NMRangeSlider/NMRangeSlider.h
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,9 @@
@property (assign, nonatomic) BOOL lowerHandleHidden;
@property (assign, nonatomic) BOOL upperHandleHidden;

@property (assign, nonatomic) BOOL roundedLowerTrackBackground;
@property (assign, nonatomic) BOOL roundedUpperTrackBackground;

@property (assign, nonatomic) float lowerHandleHiddenWidth;
@property (assign, nonatomic) float upperHandleHiddenWidth;

Expand All @@ -73,6 +76,9 @@

@property(retain, nonatomic) UIImage* trackImage;

@property(retain, nonatomic) UIImage* lowerTrackBackgroundImage;
@property(retain, nonatomic) UIImage* upperTrackBackgroundImage;

// track image when lower value is higher than the upper value (eg. when minimum range is negative
@property(retain, nonatomic) UIImage* trackCrossedOverImage;

Expand Down
129 changes: 109 additions & 20 deletions NMRangeSlider/NMRangeSlider.m
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,8 @@ @interface NMRangeSlider ()

@property (retain, nonatomic) UIImageView* track;
@property (retain, nonatomic) UIImageView* trackBackground;
@property (retain, nonatomic) UIImageView* lowerTrackBackground;
@property (retain, nonatomic) UIImageView* upperTrackBackground;
@property (assign, nonatomic) CGPoint lowerCenter;
@property (assign, nonatomic) CGPoint upperCenter;

Expand Down Expand Up @@ -70,7 +72,7 @@ - (id) initWithCoder:(NSCoder *)aDecoder

- (void) configureView
{

//Setup the default values
_minimumValue = 0.0;
_maximumValue = 1.0;
Expand All @@ -93,9 +95,9 @@ - (void) configureView

_lowerTouchEdgeInsets = UIEdgeInsetsMake(-5, -5, -5, -5);
_upperTouchEdgeInsets = UIEdgeInsetsMake(-5, -5, -5, -5);

[self addSubviews];

[self.lowerHandle addObserver:self forKeyPath:@"frame" options:NSKeyValueObservingOptionNew context:nil];
[self.upperHandle addObserver:self forKeyPath:@"frame" options:NSKeyValueObservingOptionNew context:nil];
}
Expand Down Expand Up @@ -151,7 +153,7 @@ - (void) setUpperValue:(float)upperValue
{
value = roundf(value / _stepValueInternal) * _stepValueInternal;
}

value = MAX(value, _minimumValue);
value = MIN(value, _maximumValue);

Expand All @@ -162,10 +164,19 @@ - (void) setUpperValue:(float)upperValue
value = MAX(value, _lowerValue+_minimumRange);

_upperValue = value;

[self setNeedsLayout];
}

- (void)setRoundedLowerTrackBackground:(BOOL)roundedLowerTrackBackground
{
_roundedLowerTrackBackground = roundedLowerTrackBackground;
}

- (void)setRoundedUpperTrackBackground:(BOOL)roundedUpperTrackBackground
{
_roundedUpperTrackBackground = roundedUpperTrackBackground;
}

- (void) setLowerValue:(float) lowerValue upperValue:(float) upperValue animated:(BOOL)animated
{
Expand Down Expand Up @@ -205,7 +216,7 @@ __block void (^setValuesBlock)(void) = ^ {
{
setValuesBlock();
}

}

- (void)setLowerValue:(float)lowerValue animated:(BOOL) animated
Expand Down Expand Up @@ -319,7 +330,7 @@ - (UIImage *)lowerHandleImageNormal
UIImage *image = [self imageFromBundle:@"slider-default7-handle"];
_lowerHandleImageNormal = [image imageWithAlignmentRectInsets:UIEdgeInsetsMake(-1, 8, 1, 8)];
}

}

return _lowerHandleImageNormal;
Expand Down Expand Up @@ -425,9 +436,9 @@ - (UIEdgeInsets) trackAlignmentInsets
CGFloat lowerOffset = MAX(lowerAlignmentInsets.right, upperAlignmentInsets.left);
CGFloat upperOffset = MAX(upperAlignmentInsets.right, lowerAlignmentInsets.left);

CGFloat leftOffset = MAX(lowerOffset, upperOffset);
CGFloat rightOffset = leftOffset;
CGFloat topOffset = lowerAlignmentInsets.top;
CGFloat leftOffset = MAX(lowerOffset, upperOffset);
CGFloat rightOffset = leftOffset;
CGFloat topOffset = lowerAlignmentInsets.top;
CGFloat bottomOffset = lowerAlignmentInsets.bottom;

return UIEdgeInsetsMake(topOffset, leftOffset, bottomOffset, rightOffset);
Expand Down Expand Up @@ -456,7 +467,7 @@ - (CGRect)trackRect

retValue.origin = CGPointMake(xLowerValue, (self.bounds.size.height/2.0f) - (retValue.size.height/2.0f));
retValue.size.width = xUpperValue-xLowerValue;

UIEdgeInsets alignmentInsets = [self trackAlignmentInsets];
retValue = UIEdgeInsetsInsetRect(retValue,alignmentInsets);

Expand All @@ -476,7 +487,7 @@ - (UIImage*) trackImageForCurrentValues
}

//returns the rect for the background image
-(CGRect) trackBackgroundRect
-(CGRect) trackBackgroundRect
{
CGRect trackBackgroundRect;

Expand All @@ -502,12 +513,70 @@ -(CGRect) trackBackgroundRect
return trackBackgroundRect;
}

//returns the rect for the lower track background image
-(CGRect) lowerTrackBackgroundRect
{
CGRect lowerTrackBackgroundRect;

lowerTrackBackgroundRect.size = CGSizeMake(_lowerTrackBackgroundImage.size.width, _lowerTrackBackgroundImage.size.height);

if(_lowerTrackBackgroundImage.capInsets.top || _lowerTrackBackgroundImage.capInsets.bottom)
{
lowerTrackBackgroundRect.size.height = self.bounds.size.height;
}

float lowerHandleWidth = _lowerHandleHidden ? _lowerHandleHiddenWidth : _lowerHandle.frame.size.width;
float xLowerValue = ((self.bounds.size.width - lowerHandleWidth) * (_lowerValue - _minimumValue) / (_maximumValue - _minimumValue))+(lowerHandleWidth/2.0f);

lowerTrackBackgroundRect.origin = CGPointMake(0.f, (self.bounds.size.height/2.0f) - (lowerTrackBackgroundRect.size.height/2.0f));
lowerTrackBackgroundRect.size.width = xLowerValue;

_lowerTrackBackground.layer.cornerRadius = (self.roundedLowerTrackBackground) ? _lowerTrackBackground.bounds.size.height / 2 : 0;
_lowerTrackBackground.layer.masksToBounds = (self.roundedUpperTrackBackground) ? YES : NO;

// Adjust the track rect based on the image alignment rects

UIEdgeInsets alignmentInsets = [self trackAlignmentInsets];
lowerTrackBackgroundRect = UIEdgeInsetsInsetRect(lowerTrackBackgroundRect, alignmentInsets);

return lowerTrackBackgroundRect;
}

//returns the rect for the upper track background image
-(CGRect) upperTrackBackgroundRect
{
CGRect upperTrackBackgroundRect;

upperTrackBackgroundRect.size = CGSizeMake(_upperTrackBackgroundImage.size.width, _upperTrackBackgroundImage.size.height);

if(_upperTrackBackgroundImage.capInsets.top || _upperTrackBackgroundImage.capInsets.bottom)
{
upperTrackBackgroundRect.size.height=self.bounds.size.height;
}

float upperHandleWidth = _upperHandleHidden ? _upperHandleHiddenWidth : _upperHandle.frame.size.width;
float xUpperValue = ((self.bounds.size.width - upperHandleWidth) * (_upperValue - _minimumValue) / (_maximumValue - _minimumValue))+(upperHandleWidth/2.0f);

upperTrackBackgroundRect.origin = CGPointMake(xUpperValue, (self.bounds.size.height/2.0f) - (upperTrackBackgroundRect.size.height/2.0f));
upperTrackBackgroundRect.size.width = self.bounds.size.width - xUpperValue;

_upperTrackBackground.layer.cornerRadius = (self.roundedUpperTrackBackground) ? _upperTrackBackground.bounds.size.height / 2 : 0;
_upperTrackBackground.layer.masksToBounds = (self.roundedUpperTrackBackground) ? YES : NO;

// Adjust the track rect based on the image alignment rects

UIEdgeInsets alignmentInsets = [self trackAlignmentInsets];
upperTrackBackgroundRect = UIEdgeInsetsInsetRect(upperTrackBackgroundRect,alignmentInsets);

return upperTrackBackgroundRect;
}

//returms the rect of the tumb image for a given track rect and value
- (CGRect)thumbRectForValue:(float)value image:(UIImage*) thumbImage
{
CGRect thumbRect;
UIEdgeInsets insets = thumbImage.capInsets;

thumbRect.size = CGSizeMake(thumbImage.size.width, thumbImage.size.height);

if(insets.top || insets.bottom)
Expand All @@ -519,7 +588,7 @@ - (CGRect)thumbRectForValue:(float)value image:(UIImage*) thumbImage
thumbRect.origin = CGPointMake(xValue, (self.bounds.size.height/2.0f) - (thumbRect.size.height/2.0f));

return CGRectIntegral(thumbRect);

}

// ------------------------------------------------------------------------------------------------------
Expand Down Expand Up @@ -551,8 +620,21 @@ - (void) addSubviews
self.trackBackground = [[UIImageView alloc] initWithImage:self.trackBackgroundImage];
self.trackBackground.frame = [self trackBackgroundRect];

//------------------------------
// Lower Track Brackground
self.lowerTrackBackground = [[UIImageView alloc] initWithImage:self.lowerTrackBackgroundImage];
self.lowerTrackBackground.frame = [self lowerTrackBackgroundRect];
self.lowerTrackBackground.backgroundColor = [UIColor redColor];

//------------------------------
// Upper Track Brackground
self.upperTrackBackground = [[UIImageView alloc] initWithImage:self.upperTrackBackgroundImage];
self.upperTrackBackground.frame = [self upperTrackBackgroundRect];
self.upperTrackBackground.backgroundColor = [UIColor greenColor];

[self addSubview:self.trackBackground];
[self addSubview:self.lowerTrackBackground];
[self addSubview:self.upperTrackBackground];
[self addSubview:self.track];
[self addSubview:self.lowerHandle];
[self addSubview:self.upperHandle];
Expand All @@ -571,11 +653,18 @@ -(void)layoutSubviews
{
_upperValue = _maximumValue;
}

self.trackBackground.frame = [self trackBackgroundRect];

self.lowerTrackBackground.frame = [self lowerTrackBackgroundRect];
self.upperTrackBackground.frame = [self upperTrackBackgroundRect];

self.lowerTrackBackground.image = self.lowerTrackBackgroundImage;
self.upperTrackBackground.image = self.upperTrackBackgroundImage;

self.track.frame = [self trackRect];
self.track.image = [self trackImageForCurrentValues];

// Layout the lower handle
self.lowerHandle.frame = [self thumbRectForValue:_lowerValue image:self.lowerHandleImageNormal];
self.lowerHandle.image = self.lowerHandleImageNormal;
Expand All @@ -592,7 +681,7 @@ -(void)layoutSubviews

- (CGSize)intrinsicContentSize
{
return CGSizeMake(UIViewNoIntrinsicMetric, MAX(self.lowerHandleImageNormal.size.height, self.upperHandleImageNormal.size.height));
return CGSizeMake(UIViewNoIntrinsicMetric, MAX(self.lowerHandleImageNormal.size.height, self.upperHandleImageNormal.size.height));
}

// ------------------------------------------------------------------------------------------------------
Expand Down Expand Up @@ -658,7 +747,7 @@ -(BOOL)continueTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event
if(_upperHandle.highlighted )
{
float newValue = [self upperValueForCenterX:(touchPoint.x - _upperTouchOffset)];

//if both upper and lower is selected, then the new value must be HIGHER
//otherwise the touch event is ignored.
if(!_lowerHandle.highlighted || newValue>_upperValue)
Expand All @@ -672,7 +761,7 @@ -(BOOL)continueTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event
_upperHandle.highlighted=NO;
}
}


//send the control event
if(_continuous)
Expand All @@ -682,7 +771,7 @@ -(BOOL)continueTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event

//redraw
[self setNeedsLayout];

return YES;
}

Expand Down