Yes, a better web search term (NSColorWell "first responder") and I see others have struggled with NSColorWell
and this same problem for a long time. Many old mailing list threads have covered this and saw 3 solutions:
http://www.cocoabuilder.com/archive/cocoa/82832-nscolorwell-changecolor-and-first-responder.html Douglas Davidson suggests subclassing the potential first responder(s) so they ignore
changeColor:
(probably what I'll do)http://www.cocoabuilder.com/archive/cocoa/3263-your-nscolorwell-got-in-my-nstext.html Guy English suggests making the color well the first responder temporarily (what I tried but had problems due to color well being in a panel which I don't want becoming key)
http://www.cocoabuilder.com/archive/cocoa/180323-detecting-currently-active-nscolorwell.html Martin suggests cutting preventing the
changeColor:
call in the first place by posing asNSColorPanel
and overriding a private method (closest to what I wanted, but more risk of app store rejection than I'm comfortable with)
UPDATE: I tried #1 but it turns out I can't override the first responder (WebView
/ WebHTMLView
grrr). Going with #3, I put the following in a NSColorPanel
category, made my color button set panel.avoidsChangingFirstResponder=YES
, and it seems to work:
static char changeColorPatchAssociatedObjectKey; // address of this is used as a unique runtime value
- (BOOL)avoidsChangingFirstResponder
{
NSNumber *changeColorPatchFlag = (NSNumber *)objc_getAssociatedObject(self, &changeColorPatchAssociatedObjectKey);
return changeColorPatchFlag && changeColorPatchFlag.boolValue;
}
- (void)setAvoidsChangingFirstResponder:(BOOL)enablePatch
{
NSNumber *changeColorPatchFlag = (NSNumber *)objc_getAssociatedObject(self, &changeColorPatchAssociatedObjectKey);
if ((!changeColorPatchFlag && enablePatch) || (changeColorPatchFlag && changeColorPatchFlag.boolValue != enablePatch))
objc_setAssociatedObject(self, &changeColorPatchAssociatedObjectKey, @( enablePatch ), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
+ (void)load
{
if (self == [NSColorPanel class])
{
// patch implementation of _forceSendAction:notification:firstResponder: (use swizzle technique from MAKVONotificationCenter.m)
// for one that calls original but with the last BOOL parameter conditionally changed to NO
SEL methodSel = NSSelectorFromString(@"_forceSendAction:notification:firstResponder:");
Method method = class_getInstanceMethod(self, methodSel);
IMP origImpl = method_getImplementation(method);
IMP newImpl = imp_implementationWithBlock(^(void *obj, SEL s, BOOL isAct, BOOL isNotif, BOOL isFirstResp) {
NSNumber *changeColorPatchFlag = (NSNumber *)objc_getAssociatedObject((__bridge id)(obj), &changeColorPatchAssociatedObjectKey);
if (changeColorPatchFlag && changeColorPatchFlag.boolValue)
isFirstResp = NO;
((void (*)(void *, SEL, BOOL, BOOL, BOOL))origImpl)(obj, s, isAct, isNotif, isFirstResp);
});
class_replaceMethod(self, methodSel, newImpl, method_getTypeEncoding(method));
}
}
I hope someone else finds this useful.