> A little caveat: on that note of maximum fraction digits stuff, I guess one
> should figure out whatever it is that QC supports and set it to that. Haven't
> done that yet... doubt it supports up to 20 places, doesn't sound right. I
> doubt anything horrible would happen b/c of setting it too high, probably
> just a rounding.
QC uses doubles (64 bit floats - 53 bits of fraction, 10 bits of exponent, and
1 sign bit). However, floats don't really map to a "maximum fraction digits"
sort of model; doubles, for example, support roughly 15-17 decimal digits of
precision about a ~3-digit exponent (-4.9 x 10^-324 is the smallest iirc - so
approximately 324+15 = 339 "fraction digits"). You're correct in that it'd
just round (QC probably wouldn't round - the slider or number formatter would,
or the screen would, since there aren't enough pixels to let you pick all the
in-between values).
> -gt
>
>
> On Apr 14, 2012, at 12:11 AM, Achim Breidenbach wrote:
>
>> Hello George,
>>
>> maybe you can debug and check with -(NSUInteger)maximumFractionDigits what
>> the current value of your "formatter" is, and set it with
>> -(void)setMaximumFractionDigits:(NSUInteger)number to a certain number?
>>
>> Just a guess, I am no expert in UI programming.
>>
>> best,
>>
>> Achim Breidenbach
>> Boinx Software
>>
>> On 13.04.2012, at 23:19, George Toledo wrote:
>>
>>> The Apple QCTV example has some code like this in Composition Parameters
>>> View.m
>>>
>>> else if([type isEqualToString:QCPortTypeNumber]) {
>>> minNumber = [inputAttributes
>>> objectForKey:QCPortAttributeMinimumValueKey];
>>> maxNumber = [inputAttributes
>>> objectForKey:QCPortAttributeMaximumValueKey];
>>> if(minNumber && maxNumber) {
>>> control = [[NSSlider alloc]
>>> initWithFrame:NSMakeRect(0, kVOffset + totalHeight, kDefaultWidth, 15)];
>>> [[control cell]
>>> setControlSize:NSSmallControlSize];
>>> [(NSSlider*)control setMinValue:[minNumber
>>> doubleValue]];
>>> [(NSSlider*)control setMaxValue:[maxNumber
>>> doubleValue]];
>>> }
>>> else {
>>> control = [[NSTextField alloc]
>>> initWithFrame:NSMakeRect(0, kVOffset + totalHeight - 3, kDefaultWidth, 19)];
>>> [[control cell] setWraps:NO];
>>> [[control cell] setScrollable:YES];
>>> [[control cell] setFont:[NSFont
>>> systemFontOfSize:[NSFont smallSystemFontSize]]];
>>> formatter = [NSNumberFormatter new];
>>> [formatter setMinimum:minNumber];
>>> [formatter setMaximum:maxNumber];
>>> [[control cell] setFormatter:formatter];
>>> [formatter release];
>>> [[control cell] setSendsActionOnEndEditing:YES];
>>> }
>>> [control setAutoresizingMask:NSViewWidthSizable];
>>> totalHeight += 25;
>>> }
>>>
>>>
>>> My "problem" is, that the created "Inspector" turns floating point values
>>> that are entered in, into Integer. I've tried fiddling with a few things
>>> with no success, I think just because I've gotten some syntax wrong
>>> somewhere.
>>>
>>> Does anyone know how to fix it so that I can get floating point values
>>> working?
>>>
>>> Thanks,
>>> gt
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>>
>
>
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--
Christopher Wright
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