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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>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>SampleDS - /TWAIN Helper Glue/TWAcquire.c</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<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/AppleApplications/index.html">Apple Applications</a> > <a href="../../samplecode/AppleApplications/idxImageCapture-date.html">Image Capture</a> > <A HREF="javascript:location.replace('index.html');">SampleDS</A> >
</td>
</tr>
<tr>
<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
</tr>
</table>
</div>
<!-- END BREADCRUMB -->
<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">SampleDS</div></h1></td>
</tr>
</table>
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<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td id="scdetails">
<h2>/TWAIN Helper Glue/TWAcquire.c</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/Resources/carb.r</option>
<option value="listing2.html">/Resources/vers.r</option>
<option value="listing3.html">/Source/SampleDS.c</option>
<option value="listing4.html">/Source/SampleDS.h</option>
<option value="listing5.html">/TWAIN Helper Glue/TWAcquire.c</option>
<option value="listing6.html">/TWAIN Helper Glue/TWAcquire.h</option>
<option value="listing7.html">/TWAIN Helper Glue/TWDefs.h</option>
<option value="listing8.html">/TWAIN Helper Glue/TWGlue.c</option>
<option value="listing9.html">/TWAIN Helper Glue/TWGlue.h</option>
<option value="listing10.html">/TWAIN Helper Glue/TWSystem.c</option>
<option value="listing11.html">/TWAIN Helper Glue/TWSystem.h</option>
<option value="listing12.html">/TWAIN Helper Glue/TWUtilities.c</option>
<option value="listing13.html">/TWAIN Helper Glue/TWUtilities.h</option></select>
</p>
</form>
<p><strong><a href="SampleDS.zip">Download Sample</a></strong> (“SampleDS.zip”, 156.1K)<BR>
<strong><a href="SampleDS.dmg">Download Sample</a></strong> (“SampleDS.dmg”, 226.4K)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
-->
</td>
</tr>
<tr>
<td scope="row"><img width="680" height="10" src="images/1dot.gif" alt=""><br>
<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
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<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">// ===========================================================================// TWAcquire.c TWAIN 1.9 ©1991-2001 TWAIN Working Group// ===========================================================================// Sample code for responding to the Acquire... menu item.//#include "TWAcquire.h"#include "TWGlue.h"// ---------------------------------------------------------------------------// * TWAcquire // ---------------------------------------------------------------------------// TW_UINT16 TWAcquire ( PicHandle *pPictHandle ){ TW_UINT16 ReturnCode=TWRC_SUCCESS; TW_EVENT Event; TW_USERINTERFACE UserInterface; ReturnCode=TWOpenDS(); UserInterface.hParent = NULL; UserInterface.ShowUI=TRUE; ReturnCode=TWEnableDS(&UserInterface); if (UserInterface.ModalUI && ( TWRC_SUCCESS == ReturnCode ) ) { Event.pEvent=NULL; ReturnCode=TWMessageDS(DG_CONTROL,DAT_EVENT,MSG_PROCESSEVENT,(TW_MEMREF)&Event); if (Event.TWMessage == MSG_XFERREADY) { TWTransferImage(pPictHandle); Event.pEvent=NULL; ReturnCode=TWMessageDS(DG_CONTROL,DAT_EVENT,MSG_PROCESSEVENT,(TW_MEMREF)&Event); } ReturnCode=ProcessTWMessage(Event.TWMessage); } return(ReturnCode);}// ---------------------------------------------------------------------------// * TWTransferImage // ---------------------------------------------------------------------------// TW_UINT16 TWTransferImage ( PicHandle *pPictHandle ){ TW_IMAGEINFO ImageInfo; TW_UINT16 PendingXfers; TW_INT16 result = TWRC_SUCCESS; result = TWMessageDS(DG_IMAGE,DAT_IMAGEINFO,MSG_GET,(TW_MEMREF)&ImageInfo); result = TWMessageDS(DG_CONTROL,DAT_PENDINGXFERS,MSG_GET,(TW_MEMREF)&PendingXfers); result = TWMessageDS(DG_IMAGE,DAT_IMAGENATIVEXFER,MSG_GET,(TW_MEMREF)pPictHandle); result = TWMessageDS(DG_CONTROL,DAT_PENDINGXFERS,MSG_ENDXFER,(TW_MEMREF)&PendingXfers); return result;}// ---------------------------------------------------------------------------// * TWAcquireFile // ---------------------------------------------------------------------------// TW_UINT16 TWAcquireFile ( FSSpecPtr specPtr, TW_UINT16 fileFormat ){ TW_UINT16 result = TWRC_SUCCESS; TW_EVENT event; TW_USERINTERFACE userInterface; result = TWOpenDS(); userInterface.hParent = NULL; userInterface.ShowUI = TRUE; result = TWEnableDS ( &userInterface ); if ( userInterface.ModalUI && result == TWRC_SUCCESS ) { event.pEvent = NULL; result = TWMessageDS ( DG_CONTROL, DAT_EVENT, MSG_PROCESSEVENT, (TW_MEMREF)&event ); if ( event.TWMessage == MSG_XFERREADY ) { result = TWTransferFile ( specPtr, fileFormat ); event.pEvent = NULL; result = TWMessageDS ( DG_CONTROL, DAT_EVENT, MSG_PROCESSEVENT, (TW_MEMREF)&event); } result = ProcessTWMessage ( event.TWMessage ); } return result;}// ---------------------------------------------------------------------------// * TWTransferFile // ---------------------------------------------------------------------------// TW_UINT16 TWTransferFile ( FSSpecPtr specPtr, TW_UINT16 fileFormat ){ // According to page 83 of the TWAIN 1.9 Specification, // "Macintosh developers must use TWSX_FILE2, instead of TWSX_FILE, in order // to correctly address image and audio files in the newer versions of the // operating system." TW_INT16 isTWSX_FILE2Capable = FALSE; TW_INT16 result = TWRC_SUCCESS; // verify that the Data Source supports the disk file transfer mechanism result = TWGetDSCapability ( ICAP_XFERMECH, TWSX_FILE2, &isTWSX_FILE2Capable ); if ( result == TWRC_SUCCESS ) { if ( isTWSX_FILE2Capable == TRUE ) { TW_INT16 supportsFileFormat = FALSE; result = TWGetDSCapability ( ICAP_IMAGEFILEFORMAT, fileFormat, &supportsFileFormat ); if ( result == TWRC_SUCCESS ) { if ( supportsFileFormat == TRUE ) { // set the DS transfer mode to TWSX_FILE2 result = TWSetDSCapability ( ICAP_XFERMECH, TWSX_FILE2 ); // setup the file transfer TW_SETUPFILEXFER2 fileTransferInfo; fileTransferInfo.FileName = (TW_MEMREF)specPtr->name; fileTransferInfo.FileNameType = TWTY_STR64; fileTransferInfo.Format = fileFormat; fileTransferInfo.VRefNum = specPtr->vRefNum; fileTransferInfo.ParID = specPtr->parID; result = TWMessageDS ( DG_CONTROL, DAT_SETUPFILEXFER2, MSG_SET, (TW_MEMREF)&fileTransferInfo ); // transfer the image into the file result = TWMessageDS ( DG_IMAGE, DAT_IMAGEFILEXFER, MSG_GET, NULL ); // wrap up TW_UINT16 pendingXfers; result = TWMessageDS ( DG_CONTROL, DAT_PENDINGXFERS, MSG_ENDXFER, (TW_MEMREF)&pendingXfers); } else result = TWRC_FAILURE; } } else result = TWRC_FAILURE; } return result;}// ---------------------------------------------------------------------------// * ProcessTWMessage // ---------------------------------------------------------------------------// TW_UINT16 ProcessTWMessage ( TW_UINT16 TWMessage ){ TW_UINT16 ReturnCode=TWRC_SUCCESS; TW_USERINTERFACE UserInterface; switch(TWMessage) { case MSG_CLOSEDSREQ: ReturnCode=TWDisableDS(&UserInterface); ReturnCode=TWCloseDS(); break; case MSG_XFERREADY: /* XferReadys are handled higher up */ break; } return(ReturnCode);}</pre>
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<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/SampleDS/listing5.html%3Fid%3DDTS10000657-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=2&url=/samplecode/SampleDS/listing5.html%3Fid%3DDTS10000657-1.0&media=dvd" target=_new>It’s good, but:</a> Report typos, inaccuracies, and so forth.</div>
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