Thanks for the info! I never realized that this is possible with object controllers.
But wait a minute: While playing around with this mechanism, it turns out that you have a number formatter installed on the text field for this to work. I realized this when my app crashed after I had removed the number formatter with the max value binding still in place! Removing the number formatter made the min and max bindings as well as the discard?-dialogs disappear obviously. Just tested this with the example project I referred to in my posting "Re: responding to NSStepper clicks" of tonight: Implementing the validateXXX method for your property XXX does not help at all. Sorry for pointing into the wrong direction. I had hoped you might need to overwrite something in your object controller subclass but there seems to be nothing. Here is a very old thread initiated by Matt Neuburg on cocoabuilder on the issue: http://www.cocoabuilder.com/archive/cocoa/73532-who-is-putting-up-this-dialog.html And another posting on the issue: http://www.cocoabuilder.com/archive/cocoa/101845-using-validatevalue-forkey-error-to-limit-slider-range-with-cocoa-bindings.html I couldn't make any of these work though. And that's about all I could find - no answers really. Am 17.12.2011 um 20:17 schrieb Robert Monaghan: > The binding is straight forward.. > > You create an NSObjectController, and set the "Mode" to "Class" and the Class > Name to your object with a bunch of NSNumbers. (prepared with > @property/@synthesize, naturally) > > In my NSTextField, I bind my "value", "Min Value" and "Max Value" to the > NSObjectController, specifying which NSNumbers are to be used for each. > So I have have inside my object a set of NSNumbers called "maxVal" "minVal" > and "currentVal", my NSTextField would reflect those values. > > If minVal is 10, maxValue is 20, and currentValue is 15. Everything is great. > Now type in 500 in the NSTextField, and out pops a sheet! > > I am going to see about validation. Perhaps that is how this is happening. > > bob.. > > > > On Dec 17, 2011, at 11:10 AM, Peter wrote: > >> >> Am 17.12.2011 um 19:59 schrieb Robert Monaghan: >> >>> Hi Everyone, >>> >>> Perhaps someone can help point me in the right direction on this: >>> >>> I have an NSObjectController that maintains a UI for me. >>> I have an NSTextField which contains numerical value. You could type in a >>> number, which populates an NSNumber object deep inside my code.. >>> Magically, my NSObjectController does its thing and maintains the UI. Very >>> cool stuff! >>> >>> I just recently updated my bindings for this NSTextField, so that a a Min >>> and Max Value is respected. >> >> Interesting! How did you do that via bindings? >> >>> As a test, I typed a value which is outside the Min/Max value, to see what >>> I need to implement. To my surprise, a sheet is created saying "The Value >>> 500 is too large." It prompts the user to Discard or Keep Change. >>> Where did this come from? And how do I override this? >> >> Implement a KVC validation method for your property. I guess. >> See >> file:///Library/Developer/Shared/Documentation/DocSets/com.apple.ADC_Reference_Library.CoreReference.docset/Contents/Resources/Documents/documentation/Cocoa/Conceptual/KeyValueCoding/Concepts/Validation.html#//apple_ref/doc/uid/20002173 >> >>> I can't find info in the docs. I do see a vague reference to a "sheet" in >>> the NSObjectController Docs, with add/remove selectors, etc. But nothing >>> concrete. >>> Ideas? >>> >>> Thanks! >>> >>> bob. >>> >>> >>> _______________________________________________ >>> >>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >>> >>> Please do not post admin requests or moderator comments to the list. >>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >>> >>> Help/Unsubscribe/Update your Subscription: >>> http://lists.apple.com/mailman/options/cocoa-dev/magnard%40web.de >>> >>> This email sent to magn...@web.de >>> >> > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/magnard%40web.de > > This email sent to magn...@web.de > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
