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check keydown event characters length before returning the pressed character code

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This commit is contained in:
Sergey Petrenko
2023-03-22 10:24:22 +03:00
parent a924bbfc30
commit 6ffe686ba8
1 changed files with 1 additions and 1 deletions
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modules/highgui/src/window_cocoa.mm
+1 -1
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@@ -618,7 +618,7 @@ CV_IMPL int cvWaitKey (int maxWait)
inMode:NSDefaultRunLoopMode
dequeue:YES];
if([event type] == NSKeyDown) {
if([event type] == NSKeyDown && [[event characters] length]) {
returnCode = [[event characters] characterAtIndex:0];
break;
}