105 lines
3.0 KiB
Mathematica
105 lines
3.0 KiB
Mathematica
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#import "GBOSDView.h"
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@implementation GBOSDView
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{
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bool _usesSGBScale;
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NSString *_text;
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double _animation;
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NSTimer *_timer;
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}
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- (void)setUsesSGBScale:(bool)usesSGBScale
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{
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_usesSGBScale = usesSGBScale;
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[self setNeedsDisplay:true];
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}
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- (bool)usesSGBScale
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{
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return _usesSGBScale;
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}
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- (void)displayText:(NSString *)text
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{
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if (![[NSUserDefaults standardUserDefaults] boolForKey:@"GBOSDEnabled"]) return;
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dispatch_async(dispatch_get_main_queue(), ^{
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if (![_text isEqualToString:text]) {
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[self setNeedsDisplay:true];
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}
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_text = text;
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self.alphaValue = 1.0;
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_animation = 2.5;
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// Longer strings should appear longer
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if ([_text rangeOfString:@"\n"].location != NSNotFound) {
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_animation += 4;
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}
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[_timer invalidate];
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self.hidden = false;
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_timer = [NSTimer scheduledTimerWithTimeInterval:0.025 target:self selector:@selector(animate) userInfo:nil repeats:true];
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});
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}
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- (void)animate
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{
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_animation -= 0.1;
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if (_animation < 1.0) {
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self.alphaValue = _animation;
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};
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if (_animation == 0) {
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self.hidden = true;
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[_timer invalidate];
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_text = nil;
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}
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}
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- (void)drawRect:(NSRect)dirtyRect
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{
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[super drawRect:dirtyRect];
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if (!_text.length) return;
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double fontSize = 8;
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NSSize size = self.frame.size;
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if (_usesSGBScale) {
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fontSize *= MIN(size.width / 256, size.height / 224);
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}
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else {
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fontSize *= MIN(size.width / 160, size.height / 144);
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}
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NSFont *font = [NSFont boldSystemFontOfSize:fontSize];
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/* The built in stroke attribute uses an inside stroke, which is typographically terrible.
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We'll use a naïve manual stroke instead which looks better. */
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NSDictionary *attributes = @{
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NSFontAttributeName: font,
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NSForegroundColorAttributeName: [NSColor blackColor],
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};
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NSAttributedString *text = [[NSAttributedString alloc] initWithString:_text attributes:attributes];
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[text drawAtPoint:NSMakePoint(fontSize + 1, fontSize + 0)];
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[text drawAtPoint:NSMakePoint(fontSize - 1, fontSize + 0)];
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[text drawAtPoint:NSMakePoint(fontSize + 0, fontSize + 1)];
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[text drawAtPoint:NSMakePoint(fontSize + 0, fontSize - 1)];
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// The uses of sqrt(2)/2, which is more correct, results in severe ugly-looking rounding errors
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if (self.window.screen.backingScaleFactor > 1) {
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[text drawAtPoint:NSMakePoint(fontSize + 0.5, fontSize + 0.5)];
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[text drawAtPoint:NSMakePoint(fontSize - 0.5, fontSize + 0.5)];
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[text drawAtPoint:NSMakePoint(fontSize - 0.5, fontSize - 0.5)];
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[text drawAtPoint:NSMakePoint(fontSize + 0.5, fontSize - 0.5)];
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}
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attributes = @{
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NSFontAttributeName: font,
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NSForegroundColorAttributeName: [NSColor whiteColor],
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};
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text = [[NSAttributedString alloc] initWithString:_text attributes:attributes];
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[text drawAtPoint:NSMakePoint(fontSize, fontSize)];
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}
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@end
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