Using the Windows NT Wait Cursor With OPENSTEP

The following sample code demonstrates how to call the Windows NT wait cursor on OPENSTEP 4.2 Enterprise.

#ifdef WIN32

#import <Windows.h>
// Apple OpenStep Enterprise NSCursor private initializer method
@interface NSCursor (Secret)
- (id) initWithCursorHandle: (HCURSOR) handle;
@end

#endif


@implementation NSCursor (waitCursor)

+ (NSCursor *) waitCursor

{
static NSCursor *waitCursor = nil;

#ifdef WIN32
if (!waitCursor) {
HCURSOR cursor = LoadCursor(NULL, IDC_WAIT);

if (cursor && [NSCursor instancesRespondToSelector: @selector(initWithCursorHandle:)])
waitCursor = [[NSCursor alloc] initWithCursorHandle: cursor];
}
#endif
return waitCursor;
}

@end

// some class implementation wanting to use a wait cursor

- (void) deactivateWaitCursor

{
#ifdef WIN32
NSCursor * const waitCursor = [NSCursor waitCursor];
NSArray * const windows = [NSApp windows];
const int count = [windows count];
int i;

[waitCursor setOnMouseEntered: NO];
for (i = 0; i < count; i++)
[[windows objectAtIndex: i] resetCursorRects];
#endif
return;
}

- (void) activateWaitCursor

{
#ifdef WIN32
NSCursor * const waitCursor = [NSCursor waitCursor];
NSArray * const windows = [NSApp windows];
const int count = [windows count];
int i;

[waitCursor setOnMouseEntered: YES];
for (i = 0; i < count; i++) {
NSWindow * const window = [windows objectAtIndex: i];
NSView * const contentView = [window contentView];

[window enableCursorRects];
[contentView addCursorRect: [contentView frame] cursor: waitCursor];
}
#endif
return;
}