Loupe has gray corners in macOS 10.15 Catalina

[DavidPhillipOster]

To fix this, (1 of 3) in TSSTInfoWindow.h , change:

@interface TSSTInfoWindow : NSPanel {}

to

@interface TSSTOuterInfoView : NSView {
  float lastDiameter;
}
- (void)resizeToDiameter:(float)diameter;
@end

@interface TSSTInfoWindow : NSPanel {
  IBOutlet TSSTOuterInfoView *outerView;
}

and (2 of 3) in TSSTInfoWindow.m with the other imports, add:

#import <QuartzCore/CAShapeLayer.h>

in - (void)centerAtPoint:(NSPoint)center add:

 [outerView resizeToDiameter:frame.size.width];

in - (void)resizeToDiameter:(float)diameter
add:

  [outerView resizeToDiameter:diameter];

and above @implementation TSSTInfoView

add

@implementation TSSTOuterInfoView

- (void)awakeFromNib {
  [super awakeFromNib];

  CALayer *baseLayer = [[CALayer alloc] init];
  baseLayer.backgroundColor = NSColor.clearColor.CGColor;
  self.superview.layer = baseLayer;
}

- (void)resizeToDiameter:(float)diameter {
  if (lastDiameter != diameter) {
    CAShapeLayer *shapeLayer = [[CAShapeLayer alloc] init];
    CGPathRef path = CGPathCreateWithEllipseInRect(NSMakeRect(0, 0, diameter, diameter), nil);
    shapeLayer.path = path;
    CGPathRelease(path);
    self.superview.layer.mask = shapeLayer;
    lastDiameter = diameter;
  }
}
@end

(3 of 3): in TSSTSessionWindow.xib, in the Loupe Panel hierarchy, click on the middle View (between the Loupe Panel and the Zoom View, and use the Identity Inspector to change the class from NSView to TSSTOuterInfoView . Control-drag from the Loupe Panel to the Outer View to connect the outerView IBOutlet

This fix uses CoreGraphics Layer Masking to mask the Loupe to just its circular region.

[MaddTheSane]

It usually helps if you create a pull request.