[MacRuby-devel] printing

[John Shea]

That was it - the assign statement. Thanks very much!

I just assumed I was getting the object and not a copy ..

(and sorry I should have checked the samples first)

Cheers and thanks,
J


On Dec 3, 2008, at 23:00 , Laurent Sansonetti wrote:

> Hi John,
>
> On Dec 3, 2008, at 8:45 AM, John Shea wrote:
>
>> Hello all,
>>
>> has anyone done any printing in MacRuby?
>
> Some examples that ship with MacRuby (such as PathDemo or  
> PagePacker) implement a printing facility. I don't really remember  
> how it's implemented but maybe this can help you.
>
>> I can get it to print ok - if I select the page range, otherwise  
>> the print routine wants to print thousands (or more - i got scared  
>> and stopped it) pages.
>>
>> The rectForPage and the drawRect get called those thousands of  
>> times - even though the range should be 1 page.
>>
>> I suspect that the issue is in the knowsRangePage - it is passed a  
>> pointer.
>>
>> I de reference the pointer with range = range_pointer[0]  (which  
>> does give me a range) and then set values with range.location =  
>> etc, etc
>> (rather than range_pointer->location  =  1 , in Objective C)
>
> range_pointer[0] will return you a completely new NSRange object. If  
> you alter the object it's not going to alter the range_pointer object.
>
> Do you re-assign the object back to the pointer?
>
> r = range_pointer[0]
> r.location += 1
> range_pointer.assign(r)
>
>> My suspicion is that although i set the range length and location  
>> that in fact it is not changing the original pointer appropriately,  
>> but perhaps inappropriately ;-) with a very large number (a memory  
>> address perhaps?).
>>
>> Anyone else had this issue?
>
> Otherwise, could you share with us a sample project that reproduces  
> the problem? Maybe it's a bug in MacRuby.
>
> Laurent
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