---
title: WWDC2003 Session 410
framework: wwdc
role: article
path: wwdc/wwdc2003-410
---

# WWDC2003 Session 410

## Transcript

Kind: captions Language: en are you doing folks thank you all for coming all you guys in the back move on up front a lot of its space back here I can't really see you people too low thank you for coming to today's session 400 410 cocoa update is like me you love Coco you're going to see a lot of really great stuff in here that's going to make you love it even more if you don't yet love cocoa you will after this session we're going to talk about some really great additions the frameworks and here to talk about them are Leos our manager of Coca frameworks good morning yes so we are going to talk about cocoa great stuff to that is to cocoa let's see as usual you might have come to this coke update talks before we're going to talk about the changes we made in the app get the application framework and foundation framework we're going to talk about new features and we're going to talk about some of the significant API changes we've made we are not going to talk about bug fixes because we don't have time to go and go into all of that stuff but we are going to cover the major stuff and we will also provide plenty of pointers to other sessions because there's a lot of information being presented to you at the stove video VDC so first the athlete update which I will do okay so if you have come to Scott Forstall in Bertram's talk you probably you heard about the Aqua changes that we made they're mostly refinements Scott showed some of them to you their changes in the look of Windows menus have used boxes etc our goal with the Aqua refinements we made is that it's all automatic adoption by your apps the metrics are compatible and the api's are compatible so hopefully no changes for your app I will just show you some of these changes they're pretty subtle for the most part on the right side you have the old aqua look the Jaguar and the new side that stuff in cancer I'm not sure if you can really see but the window titled art slightly different if you run Panther you'll probably notice them the splitter bar now has a more sort of elegant simple the slider is more elegant it's thinner a knob there the buttons actually looks somewhat better also the Tavi on the box and the bottom the right and the left you can notice that the tab you in the boxes have changed significantly and they are a much more elegant fresher look and you'll note that despite the big change their the metrics are compatible the inside should still fit your views just fine so if not you know you run into problems please report bugs on that other changes we made in aqua you might have already noticed if you're running cancer is there smooth scrolling now the parameters are still being fine-tuned but basically allowing you to not loose context as you scroll through pages faster window and sheet animations and also a distinct look for main key and inactive windows if you don't know what this means I'll just touch upon it during my demo in a few minutes safe Allen open panel have undergone a lot of changes you might have used users already and noticed it it's brand new look and feel but again compatible api's that's our goal the main goal here with the save and open channel is one not only provide more functionality to the user like list view and column view but also provide the same user centric model we are providing in finder so that's the open panel and this is the face panel running as a sheet and texted it now you'll notice that in the bottom of this screen shot there's an access review again clicks that it didn't have to change it all to use when you save panel the excess review just works the safe panel just works it just looks and feels considerably different we have added a new API to spacetown open channel which is independent of actually the changes we made actually API is an open panel as you know you could have a new folder button in the safe panel but sometimes there are cases where you want it in the open panel as well and we've allowed you to do that with this new API we've also deprecated these view tags that face panel had I mean I don't think anybody was using them anymore but if you are using them heavily depending on them you might want to let us know these were the tags that let you get to the various UI elements in the open and save panels so you could fiddle with them typically we recommend using excess reviews to customize these panels mini controls is another new feature in Panther it's not automatic if you want to use many controls you have to ask for them they are smaller than small you'll see the regular the small and the meanie all the way at the right side are your mini controls there so as we as we improve our miniaturization technology we will be able to fit 38 million controls on window like rg5 but right now we have the mini control mini controls used with the ground a 9 as their system fonts we have added a new method to enter span to allow you to dynamically get that figure as opposed to hardwiring it into your app so we have that new control and if you were to Scott Forstall the section of the state of the union you heard about that switcher thing that's that switcher thing you see and finder which just you switch between two three four in the different modes it is available in finder in Jaguar you've seen their open state on also uses it it's a subclass of control and also available to sell yesterday in one of the session summary was asking that they could not see this control and interface builder yet that's because it's not there yet there's a public API in the seat it will be there for the final one one problem we're having with this control is that we just can't come up with a name so we'd like you to help name this new class there's immense brain power in this room so please send us your name ideas to name that class at groups at absolute calm the only requirement that start with NF and you know don't put your name in it or whatever but so so this is all you know for fun just send us your things you know it's going to be we're just going to see if there are some great ideas out there we have a few ideas we're not happy super happy with most of them so we'll see and legal asked me to put this next slide up you know you send us that name that name is ours you can't claim anything etc etc and your name isn't the name of a product and you're like NS Adobe Photoshop is not a good name so okay so just send us your name to the next few days but not now listen to me now but after the session you can do it and you know we'll see what comes up and you know the you know if we use your name will give you a big thank you so we have new button Styles the disclosure triangle which is something that's been missing is now a button style on s button we also have a textured button let's see now there you go we also have the textured button style which is basically buttons that look appropriate for texture that is metal windows so it's just another style of button to get that we also added a circular slider it's a separate slider type it's the little things so you set the slider type and there's an enum for the slider type most of the rest of the slider API ends up working for instance the bottom slider in that picture I know if you can see it but has little tick marks and so on so you can you know the slider still work circle sliders just circular tool bar now has the concept of selectable to our items Scott Forstall mentioned this in this talk this is like in System Preferences where a toolbar items are not actions but they denote state just like with other two large stuff it's pretty easy to use your delegate normally declares what item should be on the toolbar it now also declares if it wants what items can be flexible with this method and returns an area of the selectable identifier and then everything else is managed by the toolbar for you if you want of course you can exclusively change the selected item with these two calls set selected item or you can ask for it with selected item identifier pretty straightforward talk about selections one problem we had with focus rings and now that is we implement focus rings more and more throughout the kit is in some cases automatic focus rings you know just this is often if you've enabled focus rings or keyboard navigation or even if not because we draw focused rings for you on text fields and table views and such sometimes the focus ring just doesn't look right an example is a screenshot I know if you can tell but this table views you know hitting the top edge of the window and the focus ring ends up just overlapping the border of the window up there and sometimes you have this case for the tables across the one side of the one edge of the window and again you don't want to focus ring drawn so in these cases you can now disable the focus ring drawing from its default setting to none and where there will be other settings we had in the future and exterior is where you actually say I wanted exterior always for some reason default just means control do the right thing with the focus ring there are cases where table we're actually decides not to use to draw the focus ring if it knows that won't look good but it can't always tell and that's why we give you this control text field sales now has api for placeholder strings what placeholder is this is this new UI paradigm thats you know appears in the last year or two where text field has a default placeholder where you can tell what you're supposed to type like last name address search you know google and i think in the safari toolbar and so on so you can now specify placeholders during you can even specify an extra Beauty string if you wish if you don't like the great version but you want some other radically different things so we specify the placeholder as soon as the user starts typing it's replaced by what they're typing jumping from text field to search field thank you search field is a new control it's a subclass of text field it's also available as a cell it's basically that the search functionality the UI for the search functionality that you see in sapphire email address book bunch of other apps and it features you know search button on the left side you know earlier I screwed up my left and right didn't I oh so feature the search button on the left side the X button on the right side and these are customizable and there's a recent list as well let's just talk about the API of it you can customize a search or cancel buttons if you want you can have some other button up here there instead of a magnifying glass or not appear at all you can customize the search menu that's the menu that appears beneath the you know when you bring down the menu just you provide a template which allows you to say where you want the recent item to go or what other items you want in there you can also customize the way regions are handled you can either have us manage the reasons for you or you can specify what the reasons are and you can even have the search field save the reasons automatically to preferences so that you know the user type stuff the recent automatically saves you'll never have to worry about it and you do that using the autosave name stuff that you might be familiar with from in a window or in its table view you just specify the autosave a mathematics the preferences for you you can also specify the maximum reasons if the default I think 10 is too big to small plug not search panel the app that is not only provider of technology it's also a client of Technology because the font panel use the search field as you can see in the bottom the fonts now has many other features it's got improved collection management if you played with it you've probably seen it better user interface overall you can now have color scores and favorites in the ability to search fonts as I mentioned and the demo I will just show the fonts now quickly and see similar of its features the Fontana now has the ability to enable/disable elements of the UI this is useful in some cases where you want the user to select a font but for instance you don't want them to specify the font size or the font space or the the weight or whatever for instance users are just specify lucilla and you just need to know Lucifer you don't need to know it's 10 point 12 point if the first responder implements this method called valid modes for font panels and returns what heals at once to other fields will be disabled by default if this method isn't implemented which is of course the default state for intended to apps in most other cases the standard mode mask is assumed from fontana to fontana jur you've seen the collections and again scott touched upon that there's API for managing the collections the collections are identified by a name and they represent a bunch of fonts we have methods for add a collection you remove a collection and also of course enumerate the collection by getting an array of collection names fairly straightforward you'll note that when you add a collection its global for the user that means the collection applies to all of the users applications appears in the pond panels for all apps there's an option to make a collection / app however in these WWE cc'd that option is not working yet in addition to being able to manage the collections you can manage the font from the collections by adding fonts to a collection removing fonts from a collection enumerate in the fonts in a collection now notice here that I'm not talking in terms of NS font which is how we usually represent fonts in Cocoa but I'm talking in terms of the font descriptor object which is another new object and that's here last descriptor is a lightweight object we lets you specify a font which isn't as much detail as you want for instance you can specify that Helvetica oblique 13 or you can just specify its Helvetica you can even specify its 13 but maybe that's not very useful it also allows you to specify colors and a bunch of other attributes and the font descriptor much lighter weight than a font so if you have a collection would say 10,000 fonts in it you know you don't have to enumerate all those enough on instances and also lets you represent fonts partially and that's why we added this class he expected so clear in future eight more in future api's so Claude fonts the next obvious topic in text and there are lots of changes in text in session for 27 friday afternoon at five it's the great time you can state an extra hour avoid traffic good anyway that session will cover these in detail now i do want to give a quick demo of text just to whet your appetite about what some of the stuff Doug Davidson will talk about in that session so demo three I think yes okay so let's see one thing I mentioned earlier was this distinction between main key and inactive Idriss land show you that first as you can see that the left window now is is active this one is active when you bring up a font panel like so it's a not modal panel it's the question is which we know doesn't act on now in this case it's obvious because this window is still active and my typing goes to that window however if you make the font window key by clicking on it or by typing a font number here for instance then you have two windows and you especially in a larger screen in a lot of you are getting 17 inches or big cinema displays you can't tell if windows are side by sides which one is active and that's the case in Jaguar here what ends up happening is the title bar has a distinct look now for users who don't understand is it probably won't get in the way but for users to understand this I think it's a nice touch which makes it possible to know that you know if these two windows when you're in this state let me do this when you're in this state you know exactly what window it will apply to so that's the distinction main key active state distinction now talk about the font panel here it is there's a search field as I mentioned we have added a menu here as you can see the UI has been refined a bit you can show preview that we had that before you can bring up a typography panel which we did not have in Jaguar this typography panel is context-sensitive it's sensitive based on the current font in Cocoa right now in the WWE CC discount wasn't hooked up but what does that she do is it lets you set up a bunch of font specific parameters and so it's for advanced typography but the note again in the double WCC it's not hooked up so it's not functional in Cocoa applications another feature you'll see here is that edit sizes is now a sheet rather than a separate model state and also we have a way to bring up the font panel directly from the content which is managed fund menu item down here the one thing I'm going to show you right now in detect one of the features we've added is the text completion stuff we've added automatic completion some of you might have already seen this in other contexts TV certainly provides this before and there were some packages out there like Mike spiritual package which provided completion what you basically get is as you're typing if you talk your default completion character which is either f5 or option escape or you can change it to be escape if you want if you hit that character it basically provides all the words that can complete it and in this case you know welcome happens to be the first word that's good so I can just continue tell attacking i'll type ww and well you know it doesn't know about wdc so in this case you just will type WABC now the good thing is once you've done that next time you try to type WWDC it will appear and because it's a secure and documents close by it goes all the way to the top so that's that's it [Applause] ok so we close this document one other feature in the text system is here's a document that looks pretty plain but but the extension will probably give you a clue as to what it is we don't have words on this machine and that is the word document if I were to say open and go to my desktop here you notice that the word document will appear here it actually does open so we've added support for Word documents but one thing to note though is that word is a very rich document format and word has a lot of features there are many features of word that we don't yet do of the box such as tables and stuff those features do not are not going to work very well so expect us to work with the more simple document types and in cases where we don't have word around I think it's pretty useful the good thing is you can also actually save as a word document so i can try to save this and when you do that in this case you'll actually tell me that the saving will be lost because i open the word document it might have lost some features the good thing is once you stay from text editor word document try to save i can it won't warn you anymore because it knows it's no longer la la fille but anyway this is a feature will be improving but you know the basics pretty solid support is there as is okay so one thing that we've added to the tech system is something we've been missing for a long time and that's a standard fine panel here does it look somewhat like to text edit one that from before text it now is about five hundred or three hundred lines a thinner it's got some nice you know basic find options and you know it's available in the text system by default when you create one an ID so it's there for you we have one problem people had with the text system was a default ruler people didn't quite understand what some of those fields were in fact they didn't understand what all of them were maybe except for maybe this one and we we clean this stuff of it so for spacing now we have this you can single or double and I mean that's nice and simple but not very powerful you can also for instance go ahead and specify other stuff like you can make the line height one and a half and you can specify paragraph spacing if you wish let's say 30 pixels and suddenly no you get those options so it's it's a lot more I think straightforward intuitive set these parameters right now another menu we've added here is the Styles menu and let me just talk about that briefly appliances let's say instead of this black here I want this to be outlined and by the way from at across nine times you can notice the outline fonts over there which we don't have in jag art as well so let's say you won't really like this outline font and you want to use it elsewhere in your document previously what you could do was you could copy the style and you could select this and you could paste the style and if you get use these command keys they're very useful for quickly propagating a style throughout your document one thing we've done now is if you really like the style you can go ahead and ask your favorites and let's say we call this WBC headlines and you specify whether you want the font and the ruler is part of the style so now I can come back here down here for instance and I can say yep I want that wdc headline slide so this is not style sheets but simple way to preserve the style to use often and again it's just stand apart the tech system okay so I think that's all for the demo right now [Applause] so there are many user features we showed some of them doc saw word document fine panels dealing with styles a better texture Euler background color which I doesn't show you but it's in there Texas doesn't support it yet text completion setting based writing direction that's all so we added support for this for by the writers and also we have character styles like outlines shadows etc not all of them are exposed to the UI we've also added many new text attributes again Doug will probably talk about these in more detail but there's you know strike through color stroke color shadow of bleakness expansion you can specify attach a cursor to a range of text you can attach a tooltip to a range of text you can specify line height as I showed you and paragraph spacing a lot more control over other new features include a new public types of their class the 80s pipe scissor which gives you a lot more power over the typesetting process in a glyph generator class and additional changes include truncated text drawing if you have code where you measure the text and then you go ahead and redraw it after cutting it clicking it whatever using a truncated text drawing will be a big performance win because we do all that measurement for you and put the ellipse is in the right place there's also improved access ability can see the improved access ability allows the assistive apps to get at the backing store of text and get watch more information about them and also a bunch of performance improvements for instance string drawing is way faster now again session for 27 friday afternoon i mentioned shadows and a shadow is now a new class it lets you specify a drop shadow it's a independent of the ctm so the light source determines where the delights of system light source determines where the shadow is so it's the value for a new text attribute if you set the shadow attribute to an instance of an asado all text will be drawn with that shadow now shadow is a generally useful class you can hit offset blur and you can use it anywhere just like NS color and responds by just saying set so you know just that's pretty straightforward and then any drawing you do in that graphics context will appear with a shadow so let's talk about views for a while now views in Jaguar one complaint that came up in various forums discussions etc this view wrecked coalescing problem where view with whenever it got multiple directionality it would call up them into a bigger erect and that would end up causing it to draw more than necessary let me give you a demo a little example here's your window let's say the user clicks that check box at the top and let's say clicking that check box causes that text field in the bottom to be updated it needs to happen in the same event cycle which they probably would although these individual views are invalid themselves the super view the common ancestor for these two views ends up getting an invalidation wreck that's this big which oh of course ends up touching redrawing almost everything in the view and in some case it's no big deal you know it's a result of an event on another cases there's a performance it and could be significant so this is the problem that we're looking to solve so in fancy reviews tracking validated areas and we restrict the clipping to the areas that need drawing only so it's erect has multiple rectangles we actually set the clip areas so any drawing you do will actually only appear in those areas by default and another important thing about this is that the draw rect method which is how a view draws itself is still the funnel point for drawing we did not want apps the change to for this feature to be effective across the system now what I mean by draw rect is the funnel is that draw rect will not get called multiple times with multiple records instead drawer X will get called once with a rectangle that's the Union just like before so that behavior hasn't change and maintains compatibility now you can go ahead and draw just that rectangle as you did before and the clipping will save you there will be some gain and performance there however if you're sophisticated you can call this method get wrecked being drawn and count and get back a list and count of wrecks you do this in your draw rect method and the result of that you can just draw those rectangles you know because those are the rectangles we actually want you to draw we've also given you a convenience method to determine whether I given direct intersects these rectangles that allows you to quickly whether you erect you have should be drawn we also given you a way to override the default clipping behavior before I said that we clip for you you know the rectangles if you want to change that for some reason you'd have been pretty sophisticated to want to do that you can override that behavior return though and do your own thing there might be reasons for this but it's fairly advanced now is here you're looking at this thinking well if I have to do this and I mean you know my view that doesn't do this is not going to take advantage of of the this whole process well it turns out that most of the time the performance hint we get from this isn't because a view internally isn't managing tricks it's because at the windows content level the multiple element the views that have updated are being call us so in fact the one view that really needs to implement this is if you like the content view of your window or maybe a box that can include multiple views so just by doing it there which we've done in the app kit we are seeing in many benefits a lot of benefits to this thing but if you have a view that's fairly sophisticated a graphic view with a lot of changing documents new animations you might want to go the next step and implement this method and make it even faster another feature we've added to view which is being was being asked a lot recently was the concept this view hiding business you can basically tell of you it's hidden so thank you and it not only hides that you but it has all its sub book views of course and it also managed a lot of stuff like correct tool to brag tracking wrecked are disabled opengl surfaces are ordered out and the responder chains are just automatically you don't want to be tabbing through and you know ending up in the weeds of course and the api is very coco ask meaning simple you say set hidden or is hidden and that's it and everything else is handled for you we do have a third method unfortunately fifty percent more complex than maybe it needs to be you can ask if you whether it's hidden or whether it's hidden because a super view of that view is hidden because clearly you know if you're super gross hidden you get hidden but some implicit hiding and you can ask whether view is in that state Oh before I move over move on I should mention some people have implemented set hidden and is hidden in their applications as a category for instance in general we should work with those categories however there are cases where we were assuming the set hidden we called was our implementation and we clean those up so we believe we've addressed the compatibility problems but if you have your own set hidden methods or is hidden methods you know just make sure things are still working right of course something that might be bad Sofia to set hidden method but do never is hidden method so we're calling you know are his hidden but you're set hidden and that might be a little desire so there is a potential compatibility issue there but we have you know just the ones we've seen now there's a lot more view discussion and graphics discussion this afternoon session for 13 in the 2d drawing techniques from view to window if you manage your with windows internals like you have your own toolbar whatever or you want a sheep to come out from a custom place you can now have a delegate method that allows the sheet to come up from anywhere you want so there it is basically specify a rectangle where should come out of and we ignore the height of the rectangle for now because sheeps are always coming down so if you just specify of small with it will genie out of there and so on you can make it come out of for instance if you have your own toolbar under that toolbar we also allow you to have a custom minimized dock icon image this API used to be there for a long time it was disabled through the compatibility but we enabled it again so if you don't like the doc you know minimum is dark icon image you can provide your own in ass windows tooltips in windows used to be disabled for all windows except the active window we enable them so that in active windows in your active app the tooltips now work they are disabled in inactive applications because we don't want tool to just jump up at you everywhere but you can enable it for an inactive you can enable for the windows an inactive app by telling those windows that they should have tool tips no matter what and here is the way to do that we it used to be you can convert frame wrecks the content threats back and forth as a factory method so you can tell for this window style what's the conversion we now let you do it as a window level and that lets you take special circumstance of the window into account like toolbars and you know when those may be other future changes but these are basically little more you know for instance specific ways to do that we've also added eight new methods that parallel similar frame methods where you can set the max size min size etc of a window based on the content size of the window not the frame size of the window so these are basically parallels the existing for anyone's they look great they're not implemented in your seat though so for now this all you get for that from windows the alert we've added a new public class if you use all our channels you know that that's one of the no signal piece of C API is we have in the kit we added this class to add some flexibility over to see ap is you can now assign T equipments to your buttons you can assign custom return values you can show a Help button you see one in the left side here and you can if you want you can provide more than three buttons and sometimes the situation calls for it the API here is fairly straightforward you in it in enough soulard and then you set parameters message text and primitive text icon whatever you want then you run it just like you're on other sheets or panels at either run model or begin sheet for modal window so that brings up a sheet on a given window so pretty straightforward the one other thing here is that if you have old fee-based you know you're making old sea bass calls and you want to just convert those from UNS alert class we've got given your convenience method that does it this chrominance method in addition to just doing that same old you know same function call in the style with a method style it also sets the return value so that they're compatible with the old return values the old return values were sort of i don't know i mean if anybody ever looked at it they're like some- 101 and they weren't you know the rightmost button and it wasn't clear what it is i don't even remember what it is now the new values are like there-there like the right mouse button right right mouse button + 1 + 2 etc but this will set up the old return values assuming you want to use it in the old old way so use this if you're transferring quotes from your sea bass one to this one of course fee based ones aren't deprecated it's just you know you might want to switch for some reason or another I mentioned the Help button to get a help button to show in your NS alert you say sets help anchor and you provide the anchor that should be open when the Help button is pressed if you want more sophisticated handling you wouldn't the delegate method alerts show health and you will be called and you can then decide to show help any way you want of course in doing that you might want to use these new health manager methods we've added before it used to be that you could have I think you could have helped anchor in your info pillows and was automatically dealt with but you don't have finer control with these new help manage your methods you can specify the help anchor you want the book you want and you can even also open at the help pages by specifying query string that you get from the user for instance using fine string in book you can specify nil there for the book it will search in all the books now one other way you might provide help is rather than using healthier if you want you might maybe have your own way of opening documents or opening a help application in that case you probably turn into in this workspace and we've added some new method sentence workspace as well one of them is the ability to add and to launch an app by bundle identifier so rather than name or path you can now launch it with bundle identifier and let launch services decide which version which app it corresponds to the we've also provided some options here these are options like in a launch and classic print launch and quit etc they're a bunch of things like that or print and quit so you specify those options you can specify an apple event if you wanted some you know Apple event level customization there and you also get back a launch identifier which can be used for various other purposes currently it's not i don't use any api to take advantage of it but in the future there might be to identify what launch event you're talking about you can also now open multiple files at once with the second method you specify an area of URLs and they're all opened and that's rather than calling it one at a time and we'll see the counterpart to that in a little bit you can also now discover an applications bundle ID so if you want to get a path to an application but not launch it necessarily use this and we also now let you see the bundle identifier launch the application it's in the dictionary you get back when you get back an app launch notification and there's that key for that we also now have sweet notifications we have will sleep in a good wake we don't have the other two these two are not implemented in the wwc feed but I mean they what is you might expect them now in the will sleep notification you can actually take your time to do some stuff if you want and the machine won't go to sleep until you're done however you can't count on that because there might be cases where the machine is going to emerge in some sleep the lid is closed or the power is going out or there's no battery in those cases you might not even get this notification or if you do it might still go to sleep halfway through this so don't count on being able to do stuff in this notification it's just a way to if you did want to do something this is the way to do it better than what you had before okay so earlier we talked about opening multiple files this is the counterpart you will get an open files call which includes all the files that were open this is very useful for except the user double clicks on you know 30.jpg documents and finder you if you want to hear that they all came as one big clump you would implement this method and get all of them before there are ways I could implement open file you get 30 open calls and you could check to see whether you're on the same event cycle to deduce that they were all or being open together if these methods are implemented they will supersede the old message which is application open file colon now note that with multiple file requests coming in at the same time the delegate has more responsibility for handling UI and error conditions for instance the you know one of the files might not open the user might cancel the opening process in between you know when a panel comes up or such to enable you to do this typically you handle this by sending an apple event we've added a method in its application that lets you I just send a reply to open or print and you specify what you want communicated it's handled for you so you don't have to do any special apple event stuff now if you do want more sophisticated behavior you can send Apple events directly using app lament manager class here the successes implied so you would typically use this if you just want to communicate canceled or failure so let's jump to menus mac OS 9 you know the those of you whose mac OS 9 you know that when you went to the control panel menu item in the apple menu you could select that menu item although the submenu would open up the control panel where you could choose what you wanted croco didn't have that ability to assign those you know a super menu to be a leaf target and now you can do that you can just set the target an action on a menu item and it will work we also added this sport for dynamic menu items based on Kia Cologne what I might mean by this is you hold down alternate or option or shift and the menu title changes and you know something different happens the way you do that is you just specify certain menu items with being alternates of the first one and if we notice that they're alternates we just collapse them into one menu item now if you run such a nib file on jaguar the individual menu items will show us distinct items which is you know reasonable behavior maybe not not exactly what you wanted but in jaguar this feature doesn't exist so it's better than nothing another thing in menus it can now atribute idols you don't have full you can't put full attribute of strings here you know like a word document but you can specify the style and I think an embedded image it's fairly limited and color and you can also have tool clips on menu items and then as many now is a delegate after so many years it's finally got a delegate this we added this for lazily populating the menu there are some menus which take time to populate and you don't want to necessarily do it at the app launch so we have this delegate method menu needs updates and you can go ahead and populate the menu when you get that that's being that will be sent to you when the menus product it would seem would be a good idea for us to talk about teachers before we implement them implement in the order of the amount of interest yes but this is very good feedback thank you so now if the building the menu might take a while because you have to go out to the network or you have to do other stuff you can choose to implement these additional delegate methods where you tell the menu how many items it will have and also fulfill a request to build one menu item and you can also stress you can also indicate what the key accounts are of menu item is so by implementing these three methods you will get a lot better performance out of lazily built menus if they are slow to build now the last one the key equivalent the reason you want to do that is when the user hits a key equivalent you know command H command C we have to go through the menus looking for them and normally with to populate your whole menu to find a South well this the third method here allows us to find out what the key equivalent is without populating the whole menu typically for a dynamically build menu like that the key accounts might be there might be none so you just return I believe you just returned no from this and and that's that's that gets you where you one okay and one other feature that I ammeter talked about in the sessions i went to is customizable command keys in system preferences you can now specify command keys for arbitrary menu items and they can be either global or they can be per app in this works in cocoa and carbon app so it's across the system so you know you can specify what menu equivalents you want for whatever and here you see for instance texted it has some housing of start speaking has been set to command option s hide others has been set the command option age so it works everywhere and so on so that's what's fairly useful NS browser one thing in this browser didn't have before was continuous horizontal scrolling it was if you remember it would just jump in discrete steps it's now implemented and on by default we now also column resizing which is what finder finder had this in jaguar column resizing by default is not on so the browser behaves like it did before because they're enough compatibility issues that we do not want to you know introducing compatibility as a result of this you can change the column resizing type to one of three values the no colonies Isaac means the columns will never resize before David resize based on the width of the browser auto column resizing is the behavior we have today and user column resizing is where the user can resize them any way they want and of course you know we provide a you know be good to provide persistence of these values so you don't have to worry about them so just by sitting an autosave name like we saw earlier you can get the column width to be saved automatically in preferences you can also if you want to do more sophisticated action as a result of column width size changes you can implement this notification and basically do whatever you want table view now has index set based selection management will talk about index set in a few minutes that Chris Parker will go into that class but sort of individually specifying of you know role IDs column ID you do not specify them in turn in bulk which is a lot more efficient and this NF index set is a new foundation class we also have api for managing sorting UI by using this other new class called sort descriptor i hope you realize this means we don't do sorting for you just the sort you I for you but basically we do show you know the appropriate we let the user click on those the column headers and you tell us which columns are shortle and how and we just manage the sorting behavior for you and by the way we also yet says they're automatically made the state persistent if you've asked your table you to be persistent the data source which is what you usually implement still does the actual sorting but we tell it what the short parameters are and I'll sign you of course which is subclass of table who has the same behavior in table we we have fine your grid drawing control you can now draw vertical or horizontal grids independently we have control over background drawing points if you want all training background colors this might have been a way to do it but turns out we added this other method that says set use of all training background colors which is the white and blue or white and gray colors you see in a lot of apps these days if you want if you want to use those colors in your own lists or tables and also add methods NS colors return an area of those colors so white light blue white light blue it can change depending on you know the release whatever you can also find out the current control tint before it wasn't easy for you to find out whether the system was set to graphite or aqua the blue you could find out what the current color was but you couldn't really tell it was graphite or our quadrant and looking at the hero of the color and as color also now allows you to set the fill and Stroke colors independently so set still set stroke so these are considered primitives just like this existing set method NS colors NS image we now support postscript in eps files you heard about that i think on monday we yeah my name's go ahead and try it and see how it works i think the first time it couldn't be a bit slow to set up the vm but after it's pretty quick and works pretty well we also support five channels CMYK a images image view now those automatic animation of images you can enable or disable this if you want as we need as you know we added animated image sport in Jaguar but now image view will also do it for you automatically you can now prove it up with this great new function called show animation effect and basically that's to get the little proof animation we have to actually animation effects and more to be added maybe in the future they both do the same thing the securing and proof but you really want proof and not a disappearing action you know you can choose proof as opposed to the other one and it's an ASA kind of action and you'll get called back if you want to when the proof is done and as cursor now sports images other than 16 by 16 for applications compiled on Panthers or linked on Panther the reason for that is we found some incompatible teaser I just enabling this some applications it turns out we're already specifying large images and so we're getting ugly cursor images so we can't enable the suturing compatibility reasons there's also sports for additional standard cursors that you know you might need in many cases pointing hand closed hand resize etc okay wait speech classes we have two classes that wrap bunch of speech api's they're quite powerful you should look at them I'm not going to talk about them here because you know the time is short and teachers are many speech recognizer speech synthesizer it lets you get that commands for various recognized each that the user might be saying another thing i'm not going to do justice here is and so i'm going to talk about it other than talk about a bit is the controller layer which is the bindings you've seen two demos of this i think you're all excited to go see the demo this afternoon it's basically a TI to eliminate the glue code it comes it's a bunch of enhancements of you know in various places we've enhanced the key valley coding if you're familiar with that we also adds a new class and its controller and subclasses currently we have three in the kids object controller array controller user defaults controller and there's a very tight integration with interface builder and i will maybe i will show that or maybe that's i don't have time and in fact that's what makes this feature possible you know you the feature here is to just raise the bar as far as you know avoiding eliminating code you have to write and the integration with interface bill there's a major part of that there are two talks for this the one disaster noon cocoa you I programming Friday morning there was a cocoa talk cocoa performance techniques we actually change that to a second controller lawyer talk and it's a continuation of you I programming talk where Mark Petrelli will go into more a he will actually cover the api's in more detail talk about key value coding controllers key value binding observing that's friday morning at 9am so it's not a performance talk at that slot it's the number in the room is same the title has changed so please make a note of it think andreas will probably pointed out that today's talk so interface builder has support for many of the teachers and api's discussed here not all but many I mean the days the interface builder team has track the changes and we work with them carefully to make sure everything gets in there there's sport for bindings their scores for a WebKit as you saw as a simple palette and also many of the things we talked about here there's also some good improved compatibility checking let me just give you a quick demo of this i'm going to try not to overlap too much too far can we switch to the demo machine okay so i'll create a new color application in its grace builder so if you look at some of the palace gear you'll notice there are some new things the the search field this is a search field you know you can actually drag it out here and if you bring up the inspector you'll notice there's even a way to specify the placeholder you know you can say Google here and there you go it says google in there let's see it's a table view one has some bunch of new stuff I'll get back to it in a second here you see the new box and then you tab you styles this is a WebKit currently there is a web view you can drag out and finally the bindings one down here with three nice colored boxes let's try got a table view here okay now like just as an example some of the features we talked about here you can specify down here use alternating row background so you can enable this you can specify vertical horizontal grid as you can see some of the features another feature that the IB team added is a way to specify the data cell for instance these are now the cells you notice there's somewhat different than their big counterparts here and the way you use this is you go here and you drop it and there you go this triangle here lets you set the properties of the that data cell object for instance I can make them mini controls or I can you know give them a bunch of tick marks and so there you go so that's basically how you can customize those cells the if you click on the table column like I click here select the table column the table column info also lets you specify sort key source selector etc so so much more sports there let's see okay so let me now try to save this document i will say save so note that's in the safe panel it says 10 2 and later format can you see this all the way in the back and you know that's the new key archiving format we added in jag är now if i try to specify preten to formats i will get this morning and it says you know tend to nib file it will require data loss it will result in a loss and i'll say showing compatibilities and this panel here actually you see if i can magnify in on this yeah there we go so this panel here tells you the critical losses basically this it won't even open in the old system verse and also the losses like well you won't get all the inning background colors or whatever so at this point you can choose to delete those incompatibilities or save this file in the in the new format okay so let's see what time is it yeah I think I uh maybe I let Chris come in so i'm gonna i'm not going to go to the rest of the demo at this point can we switch back to the slides please there's my clicker there okay the last thing on the talk about before I invite chris part or the stage well there's a demo is this NS nib class and it's a new class representing an interface builder nib file the API as we had before for nip files was all low the NIP from disk and there you go loaded from this we've gotten requests allow loading them from memory for performance reasons especially or for other reasons we might want to save nibs as flattened data somewhere so basically there's an escaped class you can omit it with the contents of a URL so we've loaded from the file system and you can instantiate it's over and over while keeping it in memory or if you want you can load it from somewhere else and instantiate it many times of course if you have a nib that occurs many times in your window you don't have to load it from the filesystem over and over again the other cool thing about in this nib is that these these can be archived and on archive for the whole in this new object can be archived and it represents that Nick Viall and its resources so it's a pretty powerful concept useful and you don't have to use this if you're just loading a nib file from your resources like you normally do but for more advanced you switch this is this is the place to look ok so that's it for the athlete update I hope I've left you enough time this was chris parker who is an engineer in the copa frameworks group in the rest of time thank you my name is chris parker i'm an engineer in the coco frameworks group and we're going to be talking about the stuff that we've added to foundation this year first up we've added some new language features there's a new exception mechanism in foundation and to java style exception mechanism that includes a finely clause so you get at catch at try and at finally it's binary compatible with the old one and automatically does a few things for you like bring variables up to volatile so when you throw the exception things actually work right it deals with return statements and it actually handles continued break and go to correctly so once upon a time you would have written something like this using the NS during macro and stuff like that and now we're actually asking you to write things like this using at try you can return the object directly to the catch it really doesn't take much you can actually have multiple catch statements here so as you get more as you get you put the more specific ones up front and then fall through to the more general exception class so there's also a synchronization mechanism now in foundation it's a new statement you can synchronize that any object individually and it'll clear any locks that you've held above the catch point if we throw an exception there so this is the synchronized object we don't have a synchronized method specifier so you can only do it on individual objects and actually for the exception stuff we don't have a throws clause that you can put on methods so you still have to manage that yourself and what but we've made some changes now two key value coding both to improve key value coding and support the new bindings API better and this is some of the older API that we've had in place has been deprecated and there's a category in the binding header that'll show you which are the coding had a rather which will tell you which message those are we've also got some new more consistently named methods and some new things you can do with it so you can actually set values for keys now using this new method and then also you can validate values for keys and if something does go wrong and validating a particular value for a key we actually give you a way to report a new nserror back and we'll get to that a few minutes and there's also some methods for dealing with getting hole arrays out for giving keys if you send it if you send a a value for key message your mutable array and for all of these methods there also keep at variance of these so if you need to go deeper into collections you can get back more information out than that there's also a new API for undefined keys and nil values this lets you be able to set things up for your own objects where you can specify values for undefined keys you can set value trying to find keys and you can also set with an ill value is going to be new categories on NS array no that's dictionary for value for key as well as on NS mutable array for doing set value and getting values for keys there are extremely detailed comments thanks to mark Pizzarelli in NS key value coding h and the companion that we'll talk about in a minute and it talks about how to modify the behavior for this if you want to change how it works or implement your own methods and that's definitely good reading for key value observing now this is part of how the bindings a PIAA mechanism works you can register objects for notifications about value changes on giving keypads for nsobject and subclasses who use at this ad observer for keepass specifying some options and you can specify your own context pointer which you'll get back later for NS arrays you should use add observer to objects and indexes specifying an index set this is much more efficient than pinging the ad observer for keep at method over and over and over again and again you specify some options about what kinds of things you want to get notifications for in the context corner what you'll get there we go is this the observer object will receive an observed value for key path of object with the change and nsdictionary representing the change and your context pointer that you pass them before so you can attach your own information to these notification observer notifications can be either automatic you can set it up we use our methods and we do it for you or you can actually drive the machinery by hand and there are more notes on that and the key value observing bh better in order to make some of this work for large potentially sparse sets we've got this new thing called an NS index set and it's a way to do really efficient fast storage of large numbers of unsigned integers and you create one of these basically by specifying either an individual index or an index in a range you can test to see whether or not indexes exist inside the set you can do all kinds of intersection work with it you can find out whether they're your intersected indexes in a range we're treating indexes you can pick out the first index and then you can iterate up through them to find out what what indexes are actually in the set and this ties in with a bunch of stuff for table view for pulling out selected items and stuff like that there's a mutable variant so that once you create this you can actually push indexes in and out of it you can add indexes or remove indexes by range or by entire index set so you can specify oh I've got this index that I want to take all the indexes and this other one out right so it's fairly powerful sort descriptors you want to be able to do this for table views you set up an array of sort descriptors and that describes a sword ordering and these can also be used for comparing objects you can specify one object and another object they'll tell you what the comparison result is based on those sort descriptors you can also create sorted arrays from NS arrays and you can pick out you can take an NS mutable array and basically hand it to sort of script would say sort yourself here we go value transformers again another part of the bindings API this actually allows you to return a new object for some kind of given value and let you shift it over into this other object type so it'll return you the same type or a different type with it with a you can do it either way you can transform a value and if it's a reversible transform you can actually set it up to hand you back the old value you create these yourselves by subclassing and then you can register that subclass by you can register it by name so you can get it back easily with class and we've actually provided a bunch of them for you for doing things like negating boolean and nil transforms or not know and being able to pick things up from archives so you know basically everybody's been asking for that category and NS user defaults to do colors you can do it with this too there we go and as there is a new public class for being able to specify errors flexibly you can attach your own information to these things so that they can bubble up through and you can actually put NS errors inside of other NS errors you create one by specifying a domain using a string and we've specified a number of different error domains in the headers for things in foundation and in the kit you specify an error code from within that domain and then your dictionary and there are accessors for all of these things as well as a localized description and you should use the localized description to be able to provide a meaningful string to your users when it comes up in the UI and that's XML parser after popular demand you can set one of these up from a URL if you need to do it from a file you can use a file URL or existing data and you assign a delegate in the delegate basically just implements only the messages that it's actually interested in you'll get things like starting document or did start element you'll get some namespace information you'll get you know you can do found comment stuff like that we've also added NS stream to foundation this is an its input stream and NS output streamer for reading and writing their toll free bridged into their CF equivalent so you can take one of these things and pass it right into the CF api's that take read streams or write streams the network stream support basically everything that the CF version does Secure Sockets proxy stuff like that you can also do file and memory streams and these are sub classical so if you need to do your own kinds of streams and pass them into the cs flavors you can subclass that its input stream it on its output stream and they'll just work ok parentis input stream sorry to cut you guys a lot for in its input stream you can set them up with data or with a file at path and you just read it for a given anticipated length you'll get back to length you actually read you can get a buffer in order one so that it basically as fast as we can hand it to you or you can test to see if their bites available on the stream and its output stream for writing stuff out you can write out to fixed length buffers you can write out to a growing memory buffer or go file at a pass same kind of thing you write a specific length you get back how much actually wrote it and you can check to see if it's available we've also set it up so you can get streams to host right so grab a pair of network stream so you can read and write to these things if you don't want one that you pass them in by reference if you don't want one pass nil you'll have to schedule these things in order to get event if you don't want to pull the stream constantly for event you can schedule it to get events off of off of these things and right in the run loop and once you've done that you assign a delegate your delegate will get one of these stream handle event messages but will say hey this stream just had this thing happened to it you've got open whether or not it's got bites available or you can write to it whether an error occurred that kind of thing extreme and oh there are properties to for setting things like whether or not you got stuff back out or you know out of a memory stream or if you want to set up your socks proxies what level of security you want basically all that good stuff in that line there have been a number of enhancements nsurl as well the class itself as well as a number of new classes this is a short list you should probably look into foundation headers for this stuff there will be another session about this later on probably today and tomorrow there's one tomorrow and it's URL request to represent what you want to get off the wire the response for what you actually got back there's stuff to specify caching policies for downloading URLs or once you've got it on disk connections and downloads for getting things either right into data or write down the disk and then also nsurl protocol so you can define your own if you want to support new URL types there is a modest technology demo on all of your hard drives here's a screenshot okay these are the scene AP is that the Safari guys use to get all of their work done off the network so as they improve it and they get faster you guys improve and you get faster so there is another session about this much later in the day so to wrap up Jason guys going to come up and sprint up and so we're going to have a key way shortly if you guys want to queue up behind the microphones that'll be great in the meantime let me do a quick load map for y'all go to all of our cocoa sessions lots of really great stuff the UI programming section 412 later today right here late 30 you'll get a lot of really great information on using the new bindings that we've introduced later on in the week Friday morning session for 19 at nine o'clock will go really in-depth so you'll see all the api's if you're interested in 2d drawing techniques or you want to see some really great tips and tips and tricks for things that we've done in a chat or iTunes and so on you should really go to that take a great look at how we've used the api's and how you can use the API lots of code will be in there the text session is the last session on friday five o'clock the really hardcore coco folks will be there so i know you'll all be there and you missed the first session some of you probably did item four hundred but if you look you'll be getting the DVD so you can watch it again and of course the feedback form very important we need to hear from you guys to that note if you want to send feedback start with John de Lancie he's the manager of software evangelism he's the one who takes the stuff you guys asked for and makes them do it if you have API feedback specific things you want to see this in the api's send it to coco dash feedback at group that apple com and if you have technical questions on how to use the API send it to my team develop a technical support and we'll help you out and as Ali noted we need a name for that switcher thing if you have ideas its name that class at group apple com we've got some great documentation improving all the time the API stuff will be documented in Panther we won't put documenting documentation forthcoming on there will be okay you