BlurryView/BlurryViewAppDelegate.m
/* |
File: BlurryViewAppDelegate.m |
Abstract: The app delegate object to NSApplication. |
Version: 1.1 |
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*/ |
#import "BlurryViewAppDelegate.h" |
@implementation BlurryViewAppDelegate |
- (IBAction)btnMakeViewBlurryClick:(id)sender { |
// Incorrectly set the frame |
NSRect frame = [_imageView frame]; |
frame.origin.x = floor(frame.origin.x) + 0.5; // Non pixel aligned |
frame.origin.y = floor(frame.origin.y) + 0.5; // Non pixel aligned |
[_imageView setFrame:frame]; |
} |
- (IBAction)btnFixViewClick:(id)sender { |
// Take the existing frame, which has errors in it (not pixel aligned), and align it |
NSRect frame = [_imageView frame]; |
// Convert to device space -- this is required for proper HiDPI support |
frame = [[_imageView superview] convertRectToBase:frame]; |
// At this point we can trunc/round/ceil |
frame.origin.x = floor(frame.origin.x); |
frame.origin.y = floor(frame.origin.y); |
// Convert back to the view's coordinate system |
frame = [_imageView.superview convertRectFromBase:frame]; |
[_imageView setFrame:frame]; |
// An alternative is to do this: |
/* |
NSRect frame = [_imageView frame]; |
frame = [[_imageView superview] centerScanRect:frame]; |
[_imageView setFrame:frame]; |
*/ |
// However, the choices for rounding may not meet your specific needs. |
// In this demo, it will cause the view to move 1 pixel to the top right each time. |
} |
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender |
{ |
return YES; |
} |
@end |
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