Subject: Re: Getting character info out of EventRef - msg#00223

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Re: Getting character info out of EventRef

Ken, On May 25, 2009, at 11:33 PM, Ken Tozier wrote: I need to write a category that does basically the same thing as the Leopard-only NSEvent eventWithEventRef: and in looking over the Carbon documentation, it seems really awkward to get info from an EventRef. The fields I need to get to create an NSEvent are: [NSEvent keyEventWithType: NSKeyDown location:(NSPoint)location modifierFlags: modifierKeys timestamp:(NSTimeInterval) GetEventTime(inEventRef) windowNumber:(NSInteger)windowNum context:(NSGraphicsContext *)context characters: charString charactersIgnoringModifiers:(NSString *)unmodCharacters isARepeat:(BOOL)repeatKey keyCode:(unsigned short)code]; I see that there a few dedicated functions for some fields like GetEventKind GetEventTime And I can get the modifier flags and character using GetEventParameter(inEventRef, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(modifierKeys), NULL, &modifierKeys); GetEventParameter(inEventRef, kEventParamKeyMacCharCodes, typeChar, NULL, sizeof(keyChar), NULL, &keyChar); but that leaves the following fields with no obvious way to assemble the information location windowNumber context charactersIgnoringModifiers keyCode Really, the only field in that group that I'm interested in is "charactersIgnoringModifiers" but I don't know if the other fields are absolute requirements. If they are, Is there any wat to get that info? I don't know what requirements there are for creating an NSEvent. Yes, there is a way to get the info, but exactly how depends on what kind of event you got. What is the target of your event? I don't deal with Carbon very much, but this seems like an awful lot of code to do something so simple. Even OS 7.x EventRecord struct put EventRefs to shame in the ease of use department. 1 API is too much code? Good luck getting any of this info out of an EventRecord. sheesh. If you really want to try then use ConvertEventRefToEventRecord(). Is there some chapter I'm missing that makes it all easy? There is the Carbon Event Manager Documentation: <http://developer.apple.com/documentation/Carbon/Conceptual/Carbon_Event_Manager/Intro/CarbonEventsIntro.html > And there is the Carbon Event API Reference: <http://developer.apple.com/documentation/Carbon/Reference/Carbon_Event_Manager_Ref/Reference/reference.html > And you should also read Carbon.framework/Frameworks/ HIToolbox.framework/Headers/CarbonEvents.h & CarbonEventCore.h from top to bottom. More later, Jack _______________________________________________ Do not post admin requests to the list. They will be ignored. Carbon-dev mailing list (Carbon-dev@xxxxxxxxxxxxxxx) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/carbon-dev/maillists%40codeha.us This email sent to maillists@xxxxxxxxx

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Re: Getting character info out of EventRef

On May 26, 2009, at 3:46 AM, Jack Small wrote: I don't know what requirements there are for creating an NSEvent. Yes, there is a way to get the info, but exactly how depends on what kind of event you got. What is the target of your event? 1 API is too much code? Good luck getting any of this info out of an EventRecord. sheesh. If you really want to try then use ConvertEventRefToEventRecord(). An NSObject subclass that handles special command keys inside another application. As to the one API ... not trying to dis Carbon, Iit's very useful for those ares that haven't been implemented in Cocoa yet, but in the specific case of event refs, accessing the bread and butter event fields really isn't very elegant. Compare Cocoa modifiers = [event modifiers]; OS 7 eventRecord->modifiers; To Carbon: GetEventParameter(inEventRef, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(modifierKeys), NULL, &modifierKeys); Thanks for the heads up on the ConvertEventRefToEventRecord function though. That looks like a nice way to reduce 5 individual 7 argument function calls to one. -Ken _______________________________________________ Do not post admin requests to the list. They will be ignored. Carbon-dev mailing list (Carbon-dev@xxxxxxxxxxxxxxx) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/carbon-dev/maillists%40codeha.us This email sent to maillists@xxxxxxxxx

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Re: Getting character info out of EventRef

On 2009-05-26, at 01:28:25, Ken Tozier wrote: [â] As to the one API ... not trying to dis Carbon, Iit's very useful for those ares that haven't been implemented in Cocoa yet, but in the specific case of event refs, accessing the bread and butter event fields really isn't very elegant. Compare Cocoa modifiers = [event modifiers]; OS 7 eventRecord->modifiers; To Carbon: GetEventParameter(inEventRef, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(modifierKeys), NULL, &modifierKeys); To CarbonEventsCore: UInt32 GetCurrentEventKeyModifiers(void); //(Read the discussion in the header). Â I disagree with your remark about elegance. You're speaking from the perspective of someone just dropping in -- not someone who intends to work in the medium. A major point about Carbon is consistency on a large scale and specifically with events, naming conventions that are arguably the best on the planet. The implementation is such that developers have flexibility to structure things according to the considerations they have at hand. Most folks using Carbon as their major expression would have Get/Set wrappers for their top 100 needs because obviously, if you're not doing a query for type or size, you can wrap the function so that the size and type are auto-calculated. / Developer/Examples/Carbon/HIFramework/TEventHandler.h is a starter example for wrapping the EventRef APIs in C++. Philip Aker echo astwta@xxxxxxxxx@nl | tr a-z@. p-za-o.@ Democracy: Two wolves and a sheep voting on lunch. _______________________________________________ Do not post admin requests to the list. They will be ignored. Carbon-dev mailing list (Carbon-dev@xxxxxxxxxxxxxxx) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/carbon-dev/maillists%40codeha.us This email sent to maillists@xxxxxxxxx

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Re: Getting character info out of EventRef

I sent this reply to Ken but neglected to send it to the list.On May 26, 2009, at 2:33 AM, Ken Tozier wrote:I need to write a category that does basically the same thing as the Leopard-only NSEvent eventWithEventRef: and in looking over the Carbon documentation, it seems really awkward to get info from an EventRef.I believe everything you're looking for is in the Quartz Event Taps API. Read about it in Apple's "Quartz Event Services Reference" document. You can learn more by downloading my free Event Taps Testbench application at prefabsoftware.com/eventtapstestbench.Look particularly at CGEventGetIntegerValueField and related functions, and the long list of constants in CGEventField.This is a C API, but it's not that hard to use if you have some familiarity with Core Foundation conventions.--Bill Cheesemanbill@xxxxxxxxxxxxxx _______________________________________________ Do not post admin requests to the list. They will be ignored. Carbon-dev mailing list (Carbon-dev@xxxxxxxxxxxxxxx) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/carbon-dev/maillists%40codeha.us This email sent to maillists@xxxxxxxxx