128 lines
4.3 KiB
Objective-C
128 lines
4.3 KiB
Objective-C
#import "GBImageView.h"
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@implementation GBImageViewGridConfiguration
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- (instancetype)initWithColor:(NSColor *)color size:(NSUInteger)size
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{
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self = [super init];
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self.color = color;
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self.size = size;
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return self;
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}
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@end
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@implementation GBImageView
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{
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NSTrackingArea *trackingArea;
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}
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- (void)drawRect:(NSRect)dirtyRect
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{
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CGContextRef context = [[NSGraphicsContext currentContext] graphicsPort];
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CGContextSetInterpolationQuality(context, kCGInterpolationNone);
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[super drawRect:dirtyRect];
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CGFloat y_ratio = self.frame.size.height / self.image.size.height;
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CGFloat x_ratio = self.frame.size.width / self.image.size.width;
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for (GBImageViewGridConfiguration *conf in self.verticalGrids) {
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[conf.color set];
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for (CGFloat y = conf.size * y_ratio; y < self.frame.size.height; y += conf.size * y_ratio) {
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NSBezierPath *line = [NSBezierPath bezierPath];
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[line moveToPoint:NSMakePoint(0, y - 0.5)];
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[line lineToPoint:NSMakePoint(self.frame.size.width, y - 0.5)];
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[line setLineWidth:1.0];
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[line stroke];
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}
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}
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for (GBImageViewGridConfiguration *conf in self.horizontalGrids) {
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[conf.color set];
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for (CGFloat x = conf.size * x_ratio; x < self.frame.size.width; x += conf.size * x_ratio) {
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NSBezierPath *line = [NSBezierPath bezierPath];
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[line moveToPoint:NSMakePoint(x + 0.5, 0)];
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[line lineToPoint:NSMakePoint(x + 0.5, self.frame.size.height)];
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[line setLineWidth:1.0];
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[line stroke];
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}
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}
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if (self.displayScrollRect) {
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NSBezierPath *path = [NSBezierPath bezierPathWithRect:CGRectInfinite];
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for (unsigned x = 0; x < 2; x++) {
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for (unsigned y = 0; y < 2; y++) {
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NSRect rect = self.scrollRect;
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rect.origin.x *= x_ratio;
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rect.origin.y *= y_ratio;
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rect.size.width *= x_ratio;
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rect.size.height *= y_ratio;
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rect.origin.y = self.frame.size.height - rect.origin.y - rect.size.height;
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rect.origin.x -= self.frame.size.width * x;
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rect.origin.y += self.frame.size.height * y;
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NSBezierPath *subpath = [NSBezierPath bezierPathWithRect:rect];
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[path appendBezierPath:subpath];
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}
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}
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[path setWindingRule:NSEvenOddWindingRule];
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[path setLineWidth:4.0];
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[path setLineJoinStyle:NSRoundLineJoinStyle];
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[[NSColor colorWithWhite:0.2 alpha:0.5] set];
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[path fill];
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[path addClip];
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[[NSColor colorWithWhite:0.0 alpha:0.6] set];
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[path stroke];
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}
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}
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- (void)setHorizontalGrids:(NSArray *)horizontalGrids
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{
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self->_horizontalGrids = horizontalGrids;
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[self setNeedsDisplay];
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}
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- (void)setVerticalGrids:(NSArray *)verticalGrids
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{
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self->_verticalGrids = verticalGrids;
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[self setNeedsDisplay];
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}
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- (void)setDisplayScrollRect:(bool)displayScrollRect
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{
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self->_displayScrollRect = displayScrollRect;
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[self setNeedsDisplay];
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}
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- (void)updateTrackingAreas
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{
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if(trackingArea != nil) {
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[self removeTrackingArea:trackingArea];
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}
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trackingArea = [ [NSTrackingArea alloc] initWithRect:[self bounds]
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options:NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways | NSTrackingMouseMoved
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owner:self
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userInfo:nil];
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[self addTrackingArea:trackingArea];
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}
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- (void)mouseExited:(NSEvent *)theEvent
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{
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if ([self.delegate respondsToSelector:@selector(mouseDidLeaveImageView:)]) {
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[self.delegate mouseDidLeaveImageView:self];
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}
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}
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- (void)mouseMoved:(NSEvent *)theEvent
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{
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if ([self.delegate respondsToSelector:@selector(imageView:mouseMovedToX:Y:)]) {
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NSPoint location = [self convertPoint:theEvent.locationInWindow fromView:nil];
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location.x /= self.bounds.size.width;
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location.y /= self.bounds.size.height;
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location.y = 1 - location.y;
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location.x *= self.image.size.width;
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location.y *= self.image.size.height;
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[self.delegate imageView:self mouseMovedToX:(NSUInteger)location.x Y:(NSUInteger)location.y];
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}
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}
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@end
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