SXSlider.h

gistfile1.txt

#import <Foundation/Foundation.h>
#import "Sparrow.h"

#define SX_SLIDER_EVENT_UPDATED @"sliderUpdated"

@interface SXSlider : SPSprite {
	float value;
	float min;
	float max;
	float percentage;
	
	SPDisplayObject *handle;
	SPDisplayObject *track;
}

@property (nonatomic, readonly) float value;
@property (nonatomic, assign) float min;
@property (nonatomic, assign) float max;
@property (nonatomic, assign) float percentage;
@property (nonatomic, retain) SPDisplayObject *handle;
@property (nonatomic, retain) SPDisplayObject *track;

- (void)update;
- (id)initWithHandlePath:(NSString*)handlePath andTrackPath:(NSString*)trackPath;
+ (SXSlider*)sliderWithHandlePath:(NSString*)handlePath andTrackPath:(NSString*)trackPath;

@end

SXSlider.m

#import "SXSlider.h"

@implementation SXSlider
@synthesize handle;
@synthesize track;
@synthesize value;
@synthesize min;
@synthesize max;
@synthesize percentage;

- (id)init{
	self = [super init];
	min = 0;
	max = 1;
	percentage = 1;
	self.handle = [SPQuad quadWithWidth:10 height:10 color:0xc0c0c0];
	self.track = [SPQuad quadWithWidth:100 height:10 color:0x3d3d3d];
	return self;
}

- (id)initWithHandlePath:(NSString*)handlePath andTrackPath:(NSString*)trackPath{
	self = [super init];
	min = 0;
	max = 1;
	percentage = 1;
	self.handle = [SPImage imageWithContentsOfFile:handlePath];
	self.track = [SPImage imageWithContentsOfFile:trackPath];
	return self;
}

+ (SXSlider*)sliderWithHandlePath:(NSString*)handlePath andTrackPath:(NSString*)trackPath{
	return [[[SXSlider alloc] initWithHandlePath:handlePath andTrackPath:trackPath] autorelease];
}

- (void)setHandle:(SPDisplayObject *)val{
	if(handle){
		if([self containsChild:handle]){
			[self removeChild:handle];
			[handle removeEventListener:@selector(touched:) atObject:self forType:SP_EVENT_TYPE_TOUCH];
		}
		[handle release];
		handle = nil;
	}
	if(val != nil){
		handle = [val retain];
		[self addChild:handle];
		[handle addEventListener:@selector(touched:) atObject:self forType:SP_EVENT_TYPE_TOUCH];
	}
	[self update];
}

- (void)setTrack:(SPDisplayObject *)val{
	if(track){
		if([self containsChild:track]){
			[self removeChild:track];
		}
		[track release];
		track = nil;
	}
	if(val != nil){
		track = [val retain];
		[self addChild:track atIndex:0];
	}
	[self update];
}

- (float)value{
	return (percentage*(max-min)) + min;
}

- (void)touched:(SPTouchEvent*)event{
	SPTouch *touchMoved = [[event touchesWithTarget:self andPhase:SPTouchPhaseMoved] anyObject];
    if(touchMoved){
        SPPoint *touchPosition = [touchMoved locationInSpace:self];
		if(touchPosition.x < 0) touchPosition.x = 0;
		if(touchPosition.x > (track.width - handle.width)) touchPosition.x = (track.width - handle.width);
		handle.x = touchPosition.x;
		percentage =  handle.x/(track.width - handle.width);
		[self dispatchEvent:[SPEvent eventWithType:SX_SLIDER_EVENT_UPDATED]];
    }
}

- (void)setPercentage:(float)val{
	percentage = val;
	[self update];
}

- (void)update{
	if(self.track != nil && self.handle != nil){
		handle.x = percentage * (track.width - handle.width);
	}
}

- (void)dealloc{
	self.handle = nil;
	self.track = nil;
	[super dealloc];
}

@end