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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
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<title>GrabBag - /CatSearchThread.c</title>
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
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<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Carbon/index.html">Carbon</a> > <a href="../../samplecode/Carbon/idxHumanInterfaceToolbox-date.html">Human Interface Toolbox</a> > <A HREF="javascript:location.replace('index.html');">GrabBag</A> >
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td><h1><div id="pagehead">GrabBag</div></h1></td>
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<h2>/CatSearchThread.c</h2>
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<p><strong>View Source Code:</strong>
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<option value="listing1.html">/CatSearchThread.c</option>
<option value="listing2.html">/DataBrowserTab.c</option>
<option value="listing3.html">/FileAccess.c</option>
<option value="listing4.html">/Main.c</option>
<option value="listing5.html">/Main.h</option>
<option value="listing6.html">/OverlayCursor.c</option>
<option value="listing7.html">/Resources/English.lproj/GrabBag Help/index.html</option></select>
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<p><strong><a href="GrabBag.zip">Download Sample</a></strong> (“GrabBag.zip”, 252.5K)<BR>
<strong><a href="GrabBag.dmg">Download Sample</a></strong> (“GrabBag.dmg”, 324.1K)</p>
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<!--googleon: index -->
<pre class="sourcecodebox">/* File: CatSearchThread.c Contains: Contains routines responsible for searching for files via PBCatalogSearchAsync() within a cooperative thread as well as opening and maintaining a simple search window. We call the Async version of PBCatalogSearch for better responsiveness. 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 © 2001 Apple Computer, Inc., All Rights Reserved*/#ifdef __APPLE_CC__#include <Carbon/Carbon.h>#else#include <Carbon.h>#endif#include <string.h>#include "Main.h"extern GlobalsStruct g;// State information passed into each threadstruct ThreadWindowInfoStruct{ OSType windowidentifier; FSCatalogBulkParam searchPB; EventLoopTimerRef threadIdleTimerRef; Boolean threadDone; CFStringRef nameToMatch; UInt32 numMatches; Boolean threadDoneProcessing; WindowRef window;};typedef struct ThreadWindowInfoStruct ThreadWindowInfoStruct;pascal void CatalogSearchCompletionRoutine( ParmBlkPtr paramBlock );static pascal OSStatus MyThreadWindowEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData );static pascal void IdleTask( EventLoopTimerRef inTimer, void *inUserData );// This cooperative thread loops searches the volume which the application resides on and finds all files whose name contains// the string specified within the search tab pane.pascal void ProgressThread( void *refCon ){ #define kMaximumObjects 20 // PBCatSearch returns when it finds 10 matches FSSpec spec; FSRef rootFSRef; FSIterator iterator; FSCatalogInfo searchInfo1; FSCatalogInfo searchInfo2; FSCatalogInfo catalogInfos[kMaximumObjects]; FSRef refs[kMaximumObjects]; FSSpec specs[kMaximumObjects]; HFSUniStr255 names[kMaximumObjects]; FSSearchParams searchCriteria; ControlRef control; ProcessSerialNumber psn; ProcessInfoRec processInfo; char buffer[256]; Str255 s; SInt32 displayedNumberOfMatches = 0; OSErr err = noErr; ControlID controlID = { 'Extn', 1 }; // Static text control of what we are searching for ThreadWindowInfoStruct *windowInfo = (ThreadWindowInfoStruct*) NewPtrClear( sizeof(ThreadWindowInfoStruct) ); static const EventTypeSpec windowEvents[] = { { kEventClassCommand, kEventCommandProcess }, { kEventClassWindow, kEventWindowClose } }; windowInfo->windowidentifier = kThreadWindowType; windowInfo->nameToMatch = refCon; // Pascal string to match against windowInfo->numMatches = 0; windowInfo->threadDoneProcessing = false; windowInfo->threadDone = false; err = CreateWindowFromNib( g.mainNibRef, CFSTR("ProgressThreadWindow"), &(windowInfo->window) ); if ( err != noErr ) goto Bail; SetWRefCon( windowInfo->window, (long) windowInfo ); GetControlByID( windowInfo->window, &controlID, &control ); err = SetControlData( control, 0, kControlStaticTextCFStringTag, sizeof(CFStringRef), &(windowInfo->nameToMatch) ); if ( err != noErr ) { CFStringGetPascalString( windowInfo->nameToMatch, (StringPtr)buffer, 256, CFStringGetSystemEncoding() ); err = SetControlData( control, 0, kControlStaticTextTextTag, buffer[0], buffer+1 ); } // Get information about the location of this application, so we can pass the vRefNum into PBCatSearch() processInfo.processAppSpec = &spec; processInfo.processName = nil; processInfo.processInfoLength = sizeof( ProcessInfoRec ); (void) GetCurrentProcess( &psn ); (void) GetProcessInformation( &psn, &processInfo ); /* * Get FSRef of container to search. The container must be the root directory of a volume * unless the volume supports subtree iterators. You can check the bSupportsSubtreeIterators * vMAttrib bit returned by PBHGetVolParms to see if a volume supports subtree iterators * (most volumes don't support subtree iterators). */ err = FSGetVolumeInfo( spec.vRefNum, 0, NULL, kFSVolInfoNone, NULL, NULL, &rootFSRef ); if ( err != noErr ) goto Bail; /* * Open an iterator for that container. This must use the iterator flag kFSIterateSubtree * because CatalogSearch only knows how to search a subtree. */ err = FSOpenIterator( &rootFSRef, kFSIterateSubtree, &iterator ); if ( err != noErr ) goto Bail; memset( &(windowInfo->searchPB), 0, sizeof(windowInfo->searchPB) ); // Initialize the param block CFStringGetCString( windowInfo->nameToMatch, buffer, 256, kCFStringEncodingUnicode ); // Get the unicode string /* * Initialize the searchCriteria, the searchInfo1 and the searchInfo2 records. * These tell FSCatalogSearch what to find. */ searchCriteria.searchTime = 0; /* timeout as used by a Time Manager task, or 0 for no timeout */ searchCriteria.searchBits = fsSBPartialName + fsSBFlAttrib; /* fields to look at in searchInfo1 and searchInfo2 structs */ searchCriteria.searchName = (UniChar*) buffer; searchCriteria.searchNameLength = CFStringGetLength(windowInfo->nameToMatch); searchCriteria.searchInfo1 = &searchInfo1; /* the catalog info to match */ searchCriteria.searchInfo2 = &searchInfo2; /* the catalog info mask */ /* only match files (not directories) */ searchInfo1.nodeFlags = 0; /* kFSNodeIsDirectoryBit set to 0 for files */ searchInfo2.nodeFlags = kFSNodeIsDirectoryMask; /* check only this nodeFlag bit */ /* search for this fileType */// ((FileInfo *)&searchInfo1.finderInfo)->fileType = 'CWWP'; /* AppleWorks WP files */// ((FileInfo *)&searchInfo2.finderInfo)->fileType = (OSType)0xffffffff; /* search for this fileCreator */// ((FileInfo *)&searchInfo1.finderInfo)->fileCreator = 'BOBO'; /* AppleWorks */// ((FileInfo *)&searchInfo2.finderInfo)->fileCreator = (OSType)0xffffffff; /* find only visible files */ ((FileInfo *)&searchInfo1.finderInfo)->finderFlags = 0; ((FileInfo *)&searchInfo2.finderInfo)->finderFlags = kIsInvisible; /* zero all other FileInfo fields */ ((FileInfo *)&searchInfo1.finderInfo)->location.v = 0; ((FileInfo *)&searchInfo1.finderInfo)->location.h = 0; ((FileInfo *)&searchInfo1.finderInfo)->reservedField = 0; ((FileInfo *)&searchInfo2.finderInfo)->location.v = 0; ((FileInfo *)&searchInfo2.finderInfo)->location.h = 0; ((FileInfo *)&searchInfo2.finderInfo)->reservedField = 0; windowInfo->searchPB.ioCompletion = NewIOCompletionUPP( CatalogSearchCompletionRoutine ); windowInfo->searchPB.iterator = iterator; windowInfo->searchPB.searchParams = &searchCriteria; windowInfo->searchPB.maximumItems = kMaximumObjects; windowInfo->searchPB.whichInfo = kFSCatInfoContentMod; windowInfo->searchPB.catalogInfo = catalogInfos; windowInfo->searchPB.refs = refs; windowInfo->searchPB.specs = specs; windowInfo->searchPB.names = names; // Install the Carbon Event handler for our simple search window err = InstallWindowEventHandler( windowInfo->window, NewEventHandlerUPP( MyThreadWindowEventHandlerProc ), GetEventTypeCount(windowEvents), windowEvents, windowInfo->window, NULL ); if ( err != noErr ) SysBeep(0); // Event Loop Timer to idle controls 5 times a second. (void) InstallEventLoopTimer( GetCurrentEventLoop(), 0, kEventDurationSecond / 5, NewEventLoopTimerUPP( IdleTask ), windowInfo->window, &(windowInfo->threadIdleTimerRef) ); ShowWindow( windowInfo->window ); do { YieldToAnyThread(); // Yield to other threads if ( windowInfo->threadDoneProcessing == false ) { if ( windowInfo->searchPB.ioResult <= 0 ) { // If catalog has changed since the last search, continue anyways until eof. // PBCatSearch() return 0 matches when it determines what the catalog has changed. We must call it again. PBCatalogSearchAsync( &(windowInfo->searchPB) ); if ( windowInfo->numMatches != displayedNumberOfMatches ) { NumToString( windowInfo->numMatches, s ); controlID.signature = 'Mach'; // Number of matches static text control controlID.id = 0; GetControlByID( windowInfo->window, &controlID, &control ); SetControlData( control, 0, kControlStaticTextTextTag, s[0], s+1 ); // Number of matches Draw1Control( control ); displayedNumberOfMatches = windowInfo->numMatches; } } } else if ( windowInfo->threadIdleTimerRef != NULL ) // Display final results { RemoveEventLoopTimer( windowInfo->threadIdleTimerRef ); windowInfo->threadIdleTimerRef = NULL; controlID.id = 1; GetControlByID( windowInfo->window, &controlID, &control ); (void) SetControlVisibility( control, true, true ); // Show the "Done" message Draw1Control( control ); controlID.id = 2; GetControlByID( windowInfo->window, &controlID, &control ); (void) SetControlVisibility( control, false, true ); // Hide the spinning arrows Draw1Control( control ); } } while( windowInfo->threadDone == false ); // Loop until the window is closed DisposeIOCompletionUPP( windowInfo->searchPB.ioCompletion );Bail: CFRelease( windowInfo->nameToMatch ); DisposePtr( (Ptr) windowInfo ); g.numberOfRunningThreads--; // We're done, decrement the total number of threads }pascal void CatalogSearchCompletionRoutine( ParmBlkPtr paramBlock ){ ThreadWindowInfoStruct *windowInfo = (ThreadWindowInfoStruct*) ( ((Ptr)paramBlock) - offsetof(ThreadWindowInfoStruct, searchPB) ); if ( windowInfo->searchPB.actualItems > 0 ) // If we found some matches windowInfo->numMatches += windowInfo->searchPB.actualItems; if ( windowInfo->searchPB.ioResult == errFSNoMoreItems ) // No more matches to be found { windowInfo->threadDoneProcessing = true; }}// Carbon Event Handler for our simple thread windowstatic pascal OSStatus MyThreadWindowEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData ){ HICommand command; EventRef event; WindowRef window = (WindowRef) inUserData; UInt32 eventClass = GetEventClass( inEvent ); UInt32 eventKind = GetEventKind( inEvent ); ThreadWindowInfoStruct *windowInfo = (ThreadWindowInfoStruct*) GetWRefCon( window ); switch ( eventClass ) { case kEventClassCommand: if ( eventKind == kEventCommandProcess ) { GetEventParameter( inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(HICommand), NULL, &command ); if ( command.commandID == kHICommandClose ) // <command>-W sends this command { // We turn around and send it as a kEventWindowClose (void) CreateEvent( NULL, kEventClassWindow, kEventWindowClose, GetCurrentEventTime(), kEventAttributeUserEvent, &event ); (void) SetEventParameter( event, kEventParamDirectObject, typeWindowRef, sizeof(window), &window ); (void) SendEventToWindow( event, GetUserFocusWindow() ); } } break; case kEventClassWindow: if ( eventKind == kEventWindowClose ) { windowInfo->threadDone = true; } break; } return( eventNotHandledErr );}static pascal void IdleTask( EventLoopTimerRef inTimer, void *inUserData ){ WindowRef window = inUserData; if ( window != NULL ) IdleControls( window );}</pre>
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<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/GrabBag/listing1.html%3Fid%3DDTS10000574-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
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