* win/tkWinWm.c (ReadIconFromFile): when using SHGetFileInfo to

	retrieve icon, get regular icon as well for correct Alt-Tab icon.

1 files changed, 45 insertions, 22 deletions

diff --git a/win/tkWinWm.c b/win/tkWinWm.c
index 4fff379..5e5e39a 100644
--- a/win/tkWinWm.c
+++ b/win/tkWinWm.c
@@ -12,7 +12,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkWinWm.c,v 1.64 2004/08/20 00:58:52 hobbs Exp $
+ * RCS: @(#) $Id: tkWinWm.c,v 1.65 2004/09/10 04:50:44 hobbs Exp $
  */
 
 #include "tkWinInt.h"
@@ -1182,44 +1182,67 @@ ReadIconFromFile(interp, fileName)
 	/* First check if it is a .ico file */
 	BlockOfIconImagesPtr lpIR;
 	lpIR = ReadIconOrCursorFromFile(interp, fileName, TRUE);
-	
-	/* Then see if we can ask the shell for the icon for this file */
+
+	/*
+	 * Then see if we can ask the shell for the icon for this file.
+	 * We want both the regular and small icons so that the Alt-Tab
+	 * (task-switching) display uses the right icon.
+	 */
 	if (lpIR == NULL && shgetfileinfoProc != NULL) {
+	    SHFILEINFO sfiSM;
 	    SHFILEINFO sfi;
 	    Tcl_DString ds, ds2;
 	    DWORD *res;
 	    CONST char *file;
-	    
+
 	    file = Tcl_TranslateFileName(interp, Tcl_GetString(fileName), &ds);
 	    if (file == NULL) { return NULL; }
 	    Tcl_UtfToExternalDString(NULL, file, -1, &ds2);
 	    Tcl_DStringFree(&ds);
-	    
-	    res = (*shgetfileinfoProc)(Tcl_DStringValue(&ds2), 0, &sfi, 
-			  sizeof(SHFILEINFO), SHGFI_SMALLICON|SHGFI_ICON);
-	   
-	    Tcl_DStringFree(&ds2);
-	    
+	    res = (*shgetfileinfoProc)(Tcl_DStringValue(&ds2), 0, &sfiSM,
+		    sizeof(SHFILEINFO), SHGFI_SMALLICON|SHGFI_ICON);
+
 	    if (res != 0) {
 		Tcl_ResetResult(interp);
-			      
-		lpIR = (BlockOfIconImagesPtr) ckalloc(sizeof(BlockOfIconImages));
+		res = (*shgetfileinfoProc)(Tcl_DStringValue(&ds2), 0, &sfi,
+			sizeof(SHFILEINFO), SHGFI_ICON);
+
+		/* Account for extra icon, if necessary */
+		lpIR = (BlockOfIconImagesPtr) ckalloc(sizeof(BlockOfIconImages)
+			+ (res != 0) ? sizeof(ICONIMAGE) : 0);
 		if (lpIR == NULL) {
-		    DestroyIcon(sfi.hIcon);
+		    if (res != 0) {
+			DestroyIcon(sfi.hIcon);
+		    }
+		    DestroyIcon(sfiSM.hIcon);
+		    Tcl_DStringFree(&ds2);
 		    return NULL;
 		}
-	    
-		lpIR->nNumImages = 1;
-		lpIR->IconImages[0].Width = 16;
-		lpIR->IconImages[0].Height = 16;
-		lpIR->IconImages[0].Colors = 4;
-		lpIR->IconImages[0].hIcon = sfi.hIcon;
+
+		lpIR->nNumImages               = (res != 0) ? 2 : 1;
+		lpIR->IconImages[0].Width      = 16;
+		lpIR->IconImages[0].Height     = 16;
+		lpIR->IconImages[0].Colors     = 4;
+		lpIR->IconImages[0].hIcon      = sfiSM.hIcon;
 		/* These fields are ignored */
-		lpIR->IconImages[0].lpBits = 0;
+		lpIR->IconImages[0].lpBits     = 0;
 		lpIR->IconImages[0].dwNumBytes = 0;
-		lpIR->IconImages[0].lpXOR = 0;
-		lpIR->IconImages[0].lpAND = 0;
+		lpIR->IconImages[0].lpXOR      = 0;
+		lpIR->IconImages[0].lpAND      = 0;
+
+		if (res != 0) {
+		    lpIR->IconImages[1].Width  = 32;
+		    lpIR->IconImages[1].Height = 32;
+		    lpIR->IconImages[1].Colors = 4;
+		    lpIR->IconImages[1].hIcon  = sfi.hIcon;
+		    /* These fields are ignored */
+		    lpIR->IconImages[1].lpBits = 0;
+		    lpIR->IconImages[1].dwNumBytes = 0;
+		    lpIR->IconImages[1].lpXOR  = 0;
+		    lpIR->IconImages[1].lpAND  = 0;
+		}
 	    }
+	    Tcl_DStringFree(&ds2);
 	}
 	if (lpIR != NULL) {
 	    titlebaricon = (WinIconPtr) ckalloc(sizeof(WinIconInstance));