/*

 File: ICAHandler.m

 Abstract: ICAHandler

 Version: 1.0

 Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple

 Computer, Inc. ("Apple") in consideration of your agreement to the

 following terms, and your use, installation, modification or

 redistribution of this Apple software constitutes acceptance of these

 terms.  If you do not agree with these terms, please do not use,

 install, modify or redistribute this Apple software.

 In consideration of your agreement to abide by the following terms, and

 subject to these terms, Apple grants you a personal, non-exclusive

 license, under Apple's copyrights in this original Apple software (the

                                                                    "Apple Software"), to use, reproduce, modify and redistribute the Apple

 Software, with or without modifications, in source and/or binary forms;

 provided that if you redistribute the Apple Software in its entirety and

 without modifications, you must retain this notice and the following

 text and disclaimers in all such redistributions of the Apple Software. 

 Neither the name, trademarks, service marks or logos of Apple Computer,

 Inc. may be used to endorse or promote products derived from the Apple

 Software without specific prior written permission from Apple.  Except

 as expressly stated in this notice, no other rights or licenses, express

 or implied, are granted by Apple herein, including but not limited to

 any patent rights that may be infringed by your derivative works or by

 other works in which the Apple Software may be incorporated.

 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

 THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

 FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

                           SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

                           INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,

 MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED

 AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),

 STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE

 POSSIBILITY OF SUCH DAMAGE.

 Copyright © 2005 Apple Computer, Inc., All Rights Reserved

 */ 

#import "ICAHandler.h"

@implementation ICAHandler

// ---------------------------------------------------------------------------------------------------------------------

- (BOOL)applicationShouldTerminateAfterLastWindowClosed: (NSApplication *)sender

{

    // return YES to allow the application to terminate when the user closes the last window the application has open

    return YES;

}

// ---------------------------------------------------------------------------------------------------------------------

- (void)awakeFromNib

{

    // mDeviceNames - set it to NULL - it be set to the 'devices' array (device list property dictionary)

    mDeviceListArray = NULL;

    // time to register for Image Capture notifications

    [self registerForDeviceNotification];

    // find out what devices are connected

    [self getDevices];

}

// ---------------------------------------------------------------------------------------------------------------------

- (void)dealloc

{

    [mDeviceDictionary release];

    [mDeviceListArray release];

    [super dealloc];

}

// NSTableDataSource

// ---------------------------------------------------------------------------------------------------------------------

- (int)numberOfRowsInTableView:(NSTableView *)tableView

{

    // return device count - if there's no device return 0 (to display 'No camera connected')

    return MAX(1, [mDeviceListArray count]);

}

// ---------------------------------------------------------------------------------------------------------------------

- (id)tableView: (NSTableView *)tableView

 objectValueForTableColumn: (NSTableColumn *)tableColumn

            row: (int)row

{

    NSString * identifier = [tableColumn identifier];

    // if we have at least one device connected...

    if ([mDeviceListArray count])

    {

        if ([identifier isEqualToString: @"name"])          // name

            return [[mDeviceListArray objectAtIndex: row] objectForKey: @"ifil"];

        else if ([identifier isEqualToString: @"icon"])     // icon

            return NULL;

    } else 

    {

        // ... else: for the name return 'No camera connected'

        if ([identifier isEqualToString: @"name"])

            return @"No camera connected";

    }

    return NULL;

}

@end

#pragma mark -

@implementation ICAHandler(Step1)

// Image Capture ...

// ---------------------------------------------------------------------------------------------------------------------

- (void)getDevices

{

    OSErr               err;

    ICAGetDeviceListPB  pb = {};

    // call ICAGetDeviceList (synchronous: callback proc is NULL)

    err = ICAGetDeviceList(&pb, NULL);

    if (noErr == err)

    {

        // save the device list object for later use

        mDeviceList = pb.object;

        // get more information about the device list

        [self getDeviceListPropertyDictionary];

    }

}

// ---------------------------------------------------------------------------------------------------------------------

- (void)getDeviceListPropertyDictionary

{

    OSErr                             err;

    ICACopyObjectPropertyDictionaryPB pb = {};

    NSDictionary*                     devDict;

    // get the property dictionary for the mDeviceList ICAObject

    pb.object  = mDeviceList;

    pb.theDict = (CFDictionaryRef*)&devDict;

    // call ICACopyObjectPropertyDictionary (synchronous: callback proc is NULL)

    err = ICACopyObjectPropertyDictionary(&pb, NULL);

    if (noErr == err)

    {

        NSLog(@"%@", devDict);

        // note: this dictionary contains an array "devices"

        //       the "devices" array contains a dictionary for each connected device

        mDeviceListArray = [[devDict objectForKey: @"devices"] retain];

        // update the table view

        [mTableView reloadData];

        [devDict release];

    }

}

@end

#pragma mark -

@implementation ICAHandler(Step2)

// ---------------------------------------------------------------------------------------------------------------------

static void DeviceNotificationCallback(ICAHeader* pbPtr)

{

    // DeviceNotificationCallback gets called when there's an Image Capture event notification

    // we use the refcon to get back to the ICAHandler

    ICAHandler * handler = (ICAHandler*)pbPtr->refcon;

    if (handler)

        [handler deviceNotification: (ICAExtendedRegisterEventNotificationPB*)pbPtr];

}

// ---------------------------------------------------------------------------------------------------------------------

- (void)registerForDeviceNotification

{

    OSErr err;

    ICARegisterEventNotificationPB pb = {};

    pb.header.refcon = (UInt32)self;                // set the refcon so we can dispatch back to 'self'

    pb.notifyProc    = DeviceNotificationCallback;  // global callback proc

    pb.object        = 0;                           // 0 = all objects

    pb.notifyType    = 0;                           // 0 = all types

    err = ICARegisterEventNotification(&pb, NULL);

    // ... error handling ...

}

// ---------------------------------------------------------------------------------------------------------------------

- (void)deviceNotification: (ICAExtendedRegisterEventNotificationPB*)pbPtr

{

    if (kExtendedNotificationPB == pbPtr->extd)

    {

        switch (pbPtr->eventType)

        {

            case kICAEventDeviceRemoved:                    // device removed : update device

                [self getDeviceListPropertyDictionary];

                break;

            case kICAEventDeviceAdded:                      // device added : update device

                [self getDeviceListPropertyDictionary];

                break;

            default:

                break;

        }

    }

}

@end

#pragma mark -

@implementation ICAHandler(Step3)

// ---------------------------------------------------------------------------------------------------------------------

- (void)tableViewSelectionDidChange: (NSNotification *)notification

{

    // if selection in mTableView did changed

    if (mTableView == [notification object])

    {

        int selectedRow = [mTableView selectedRow];

        if (-1 != selectedRow)

        {

            // conneceted device selected...

            [self deviceSelected: [mDeviceListArray objectAtIndex: selectedRow]];

        } else

        {

            // nothing selected ... 

            [mImportButton setHidden: YES];

            [mImportText setHidden: YES];

            [mCameraImage setHidden: YES];

        }

    }

}

// ---------------------------------------------------------------------------------------------------------------------

static void GotDeviceDictionary(ICAHeader* pbPtr)

{

    // we use the refcon to get back to the ICAHandler

    ICAHandler * handler = (ICAHandler*)pbPtr->refcon;

    if (handler)

        [handler gotDeviceDictionary: (ICACopyObjectPropertyDictionaryPB*)pbPtr];

}

// ---------------------------------------------------------------------------------------------------------------------

- (void)gotDeviceDictionary: (ICACopyObjectPropertyDictionaryPB*)pbPtr

{

    if (noErr == pbPtr->header.err)

    {

        NSArray * imageArray = [mDeviceDictionary objectForKey: @"data"];

        // note: the 'data' array contains the flattened-out array of all images/movies/music files

        if ([imageArray count])

        {

            // we have at least one file on the device

            [mImportText setStringValue: [NSString stringWithFormat: @"Ready to import %d images.", [imageArray count]]];

            [mImportText setHidden: NO];

            [mImportButton setHidden: NO];

            // get the camera thumbnail

            [self getCameraThumbnail];

        } else

        {

            // devices contains no files...

            [mImportText setStringValue: @"No images."];

            [mImportText setHidden: NO];

            [mImportButton setHidden: YES];

            [mCameraImage setHidden: YES];

        }

    }

}

// ---------------------------------------------------------------------------------------------------------------------

- (void)deviceSelected: (NSDictionary*)dictionary

{

    OSErr                             err;

    ICACopyObjectPropertyDictionaryPB pb = {};

    // release the device dictionary

    [mDeviceDictionary release];

    // ... and ask for the new one

    pb.header.refcon = (UInt32)self;

    pb.object        = (ICAObject)[[dictionary objectForKey: @"icao"] unsignedLongValue];

    pb.theDict       = (CFDictionaryRef*)&mDeviceDictionary;

    // asynchronous call - callback proc will get called when call completes

    err = ICACopyObjectPropertyDictionary(&pb, GotDeviceDictionary);

    // ... error handling ...

}

// ---------------------------------------------------------------------------------------------------------------------

static void GotCameraThumbnailCallback (ICAHeader* pbHeader)

{

    // we use the refcon to get back to the ICAHandler

    ICAHandler * handler = (ICAHandler*)pbHeader->refcon;

    if (handler)

        [handler gotCameraThumbnailCallback: (ICACopyObjectThumbnailPB*) pbHeader];

}

// ---------------------------------------------------------------------------------------------------------------------

- (void) gotCameraThumbnailCallback: (ICACopyObjectThumbnailPB*)pbPtr

{

    if (noErr == pbPtr->header.err)

    {

        // got the thumbnail data, now create an image...

        NSData * data  = (NSData*)*(pbPtr->thumbnailData);

        NSImage* image = [[NSImage alloc] initWithData: data];

        // show NSImageView and set image

        [mCameraImage setHidden: NO];

        [mCameraImage setImage: image];

        [image release];

        [data release];

    }

}

// ---------------------------------------------------------------------------------------------------------------------

- (void) getCameraThumbnail

{

    OSErr                       err;

    ICACopyObjectThumbnailPB    pb = {};

    pb.header.refcon   = (UInt32)self;

    // for Image Capture devices: best to use 'TIFF' - (will have alpha channel / mask)

    pb.thumbnailFormat = kICAThumbnailFormatTIFF;

    // use the ICAObject out of the mDeviceDictionary

    pb.object          = (ICAObject)[[mDeviceDictionary objectForKey: @"icao"] unsignedLongValue];

    // asynchronous call - callback proc will get called when call completes

    err = ICACopyObjectThumbnail(&pb, GotCameraThumbnailCallback);

    // ... error handling ...

}

@end