Hi,
This is my first time using any Apple specific APIs and i'm
somewhat new to C too so if any of my questions seem kinda stupid
keep that in mind :)
I am trying to add an Carbon interface to a small existing program
and I'm having trouble getting the browse for file thing to work. I
have done some searching and found that NavCreateGetFileDialog() or
NavCreateChooseFileDialog() should be used, and i have gotten it to
the point that i can open the application with the main window,
click browser, open the browse dialog
That's usually called an open file dialog on the Mac.
, and then thats where i have a problem, my application needs ASCII
input files (they just consist of spaces, tabs and numbers) and the
files have no extension, i would preferably like to be able to show
only ASCII text files,
I'm not aware of any way to do that short of opening them and reading
them. What is the source of these files? Why don't they have extensions?
but i would settle for anything that lets me select a file at this
point as right now every file type i put in seem to have no affect
at all. Every file shows up all grayed out and i cannot select any
file.
Also can anyone point me something that talk about the basics for
coding on a Mac/Carbon, i spent far too much time trying to figure
out what a NavListTypeHandle was, same goes with learning about
CFSTR() and OSType, is there any documentation that gives an
overview of these core functions and types that everything needs
for even the simple tasks?
I'm not aware of one.
Thanks in advanced
here is my relevant code:
....a few static variables
//our open file dialogs
static NavDialogRef OpenFileRef;
//hold the file types that may be opened and related info
static NavTypeListHandle hTypeList;
static NavReplyRecord replyNav;
int main(blah){
...some code to initialize some thing...
//for the file open dialog, we need these
fileOpenStatus = NavGetDefaultDialogCreationOptions
(&fileOpenOptions);
fileOpenOptions.clientName = CFSTR("Supply & Demand");
//we can pick any file type
hTypeList = (NavTypeListHandle)NewHandleClear(sizeof
(NavTypeList) + sizeof(OSType));
HLock ((Handle) hTypeList);
Handles don't move in Mac OS X, so there's no need to look them. Even
when they did move the operations you're about to do wouldn't cause
one to move, so locking was never needed for this.
That said, the problem is that filtering by file type is not very
reliable now that so many applications don't assign file types to
files. If you're going to use types for this, I'd use 'TEXT' and 0
(no file type assigned). The modern way is to use UTIs. Look for
NavDialogSetFilterTypeIdentifiers() in Navigation.h. But it's only
available in 10.4 and later and UTIs are based on extensions and file
types. If you need to support 10.3 you'll need to use a filter
function and filter files manually. All that said, if the files don't
have a type or an extension, how do you propose to identify them?
Larry
(**hTypeList).componentSignature = kNavGenericSignature;
(**hTypeList).osTypeCount = 2;
(**hTypeList).osType[0] = 'TEXT';
//UTGetOSTypeFromString(CFSTR("TEXT"));
(**hTypeList).osType[1] = '????';
HUnlock((Handle) hTypeList);//let it more a bit
....code to start/run the interface...
}
static OSStatus AppEventHandler(blah){
..inside switch() for the "Browse" button
NavCreateGetFileDialog(&fileOpenOptions, hTypeList, NULL, NULL,
NULL, NULL, &OpenFileRef);
NavDialogRun (OpenFileRef);
..cleanup code is not in yet, i'll add it when i can select
files
}
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