69 lines
2.0 KiB
Objective-C
69 lines
2.0 KiB
Objective-C
#import "TrackingSlider.h"
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#import "TrackingCell.h"
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@implementation TrackingSlider
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static NSString *TrackingSliderValueObservationContext = @"TrackingSliderValueObservationContext";
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- (id)initWithFrame:(NSRect)frameRect {
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self = [super initWithFrame:frameRect];
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if(self) {
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bindingInfo = [[NSMutableDictionary alloc] init];
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}
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return self;
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}
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- (id)initWithCoder:(NSCoder *)decoder {
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self = [super initWithCoder:decoder];
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if(self) {
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bindingInfo = [[NSMutableDictionary alloc] init];
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}
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return self;
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}
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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
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if([TrackingSliderValueObservationContext isEqual:(__bridge id)(context)]) {
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if(![self isTracking]) {
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id value = [change objectForKey:NSKeyValueChangeNewKey];
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[self setDoubleValue:[value doubleValue]];
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}
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} else {
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[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
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}
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}
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- (void)bind:(NSString *)binding toObject:(id)observableController withKeyPath:(NSString *)keyPath options:(NSDictionary *)options {
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if([binding isEqualToString:@"value"]) {
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[observableController addObserver:self forKeyPath:keyPath options:(NSKeyValueObservingOptionNew)context:(__bridge void *_Nullable)(TrackingSliderValueObservationContext)];
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NSDictionary *bindingsData = @{NSObservedObjectKey: observableController,
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NSObservedKeyPathKey: [keyPath copy],
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NSOptionsKey: options ? [options copy] : @{}};
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[bindingInfo setObject:bindingsData forKey:binding];
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} else {
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[super bind:binding toObject:observableController withKeyPath:keyPath options:options];
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}
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}
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- (void)unbind:(NSString *)binding {
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if([binding isEqualToString:@"value"]) {
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NSDictionary *info = [bindingInfo objectForKey:binding];
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NSString *keyPath = [info objectForKey:NSObservedKeyPathKey];
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id observedObject = [info objectForKey:NSObservedObjectKey];
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[observedObject removeObserver:self forKeyPath:keyPath];
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} else {
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[super unbind:binding];
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}
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}
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- (BOOL)isTracking {
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return [[self cell] isTracking];
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}
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@end
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