tkWinCursor.c
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- /*
- * tkWinCursor.c --
- *
- * This file contains Win32 specific cursor related routines.
- *
- * Copyright (c) 1995 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkWinCursor.c,v 1.10.2.2 2004/01/28 23:37:28 patthoyts Exp $
- */
- #include "tkWinInt.h"
- /*
- * The following data structure contains the system specific data
- * necessary to control Windows cursors.
- */
- typedef struct {
- TkCursor info; /* Generic cursor info used by tkCursor.c */
- HCURSOR winCursor; /* Win32 cursor handle. */
- int system; /* 1 if cursor is a system cursor, else 0. */
- } TkWinCursor;
- /*
- * The HAND cursor is only present when WINVER >= 0x0500. If this is
- * not available at runtime, it will default to the unix-style cursor.
- */
- #ifndef IDC_HAND
- #define IDC_HAND MAKEINTRESOURCE(32649)
- #endif
- /*
- * The table below is used to map from the name of a predefined cursor
- * to its resource identifier.
- */
- static struct CursorName {
- char *name;
- LPCTSTR id;
- } cursorNames[] = {
- {"starting", IDC_APPSTARTING},
- {"arrow", IDC_ARROW},
- {"ibeam", IDC_IBEAM},
- {"icon", IDC_ICON},
- {"no", IDC_NO},
- {"size", IDC_SIZEALL},
- {"size_ne_sw", IDC_SIZENESW},
- {"size_ns", IDC_SIZENS},
- {"size_nw_se", IDC_SIZENWSE},
- {"size_we", IDC_SIZEWE},
- {"uparrow", IDC_UPARROW},
- {"wait", IDC_WAIT},
- {"crosshair", IDC_CROSS},
- {"fleur", IDC_SIZEALL},
- {"sb_v_double_arrow", IDC_SIZENS},
- {"sb_h_double_arrow", IDC_SIZEWE},
- {"center_ptr", IDC_UPARROW},
- {"watch", IDC_WAIT},
- {"xterm", IDC_IBEAM},
- {"hand2", IDC_HAND},
- {NULL, 0}
- };
- /*
- * The default cursor is used whenever no other cursor has been specified.
- */
- #define TK_DEFAULT_CURSOR IDC_ARROW
- /*
- *----------------------------------------------------------------------
- *
- * TkGetCursorByName --
- *
- * Retrieve a system cursor by name.
- *
- * Results:
- * Returns a new cursor, or NULL on errors.
- *
- * Side effects:
- * Allocates a new cursor.
- *
- *----------------------------------------------------------------------
- */
- TkCursor *
- TkGetCursorByName(interp, tkwin, string)
- Tcl_Interp *interp; /* Interpreter to use for error reporting. */
- Tk_Window tkwin; /* Window in which cursor will be used. */
- Tk_Uid string; /* Description of cursor. See manual entry
- * for details on legal syntax. */
- {
- struct CursorName *namePtr;
- TkWinCursor *cursorPtr;
- int argc;
- CONST char **argv = NULL;
- /*
- * All cursor names are valid lists of one element (for
- * Unix-compatability), even unadorned system cursor names.
- */
- if (Tcl_SplitList(interp, string, &argc, &argv) != TCL_OK) {
- return NULL;
- }
- if (argc == 0) {
- goto badCursorSpec;
- }
- cursorPtr = (TkWinCursor *) ckalloc(sizeof(TkWinCursor));
- cursorPtr->info.cursor = (Tk_Cursor) cursorPtr;
- cursorPtr->winCursor = NULL;
- cursorPtr->system = 0;
- if (argv[0][0] == '@') {
- /*
- * Check for system cursor of type @<filename>, where only
- * the name is allowed. This accepts any of:
- * -cursor @/winnt/cursors/globe.ani
- * -cursor @C:/Winnt/cursors/E_arrow.cur
- * -cursor {@C:/Program Files/Cursors/bart.ani}
- * -cursor {{@C:/Program Files/Cursors/bart.ani}}
- * -cursor [list @[file join "C:/Program Files" Cursors bart.ani]]
- */
- if (Tcl_IsSafe(interp)) {
- Tcl_AppendResult(interp, "can't get cursor from a file in",
- " a safe interpreter", (char *) NULL);
- ckfree((char *) argv);
- ckfree((char *) cursorPtr);
- return NULL;
- }
- cursorPtr->winCursor = LoadCursorFromFile(&(argv[0][1]));
- } else {
- /*
- * Check for the cursor in the system cursor set.
- */
- for (namePtr = cursorNames; namePtr->name != NULL; namePtr++) {
- if (strcmp(namePtr->name, argv[0]) == 0) {
- cursorPtr->winCursor = LoadCursor(NULL, namePtr->id);
- break;
- }
- }
- if (cursorPtr->winCursor == NULL) {
- /*
- * Hmm, it is not in the system cursor set. Check to see
- * if it is one of our application resources.
- */
- cursorPtr->winCursor = LoadCursor(Tk_GetHINSTANCE(), argv[0]);
- } else {
- cursorPtr->system = 1;
- }
- }
- if (cursorPtr->winCursor == NULL) {
- ckfree((char *) cursorPtr);
- badCursorSpec:
- ckfree((char *) argv);
- Tcl_AppendResult(interp, "bad cursor spec "", string, """,
- (char *) NULL);
- return NULL;
- } else {
- ckfree((char *) argv);
- return (TkCursor *) cursorPtr;
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkCreateCursorFromData --
- *
- * Creates a cursor from the source and mask bits.
- *
- * Results:
- * Returns a new cursor, or NULL on errors.
- *
- * Side effects:
- * Allocates a new cursor.
- *
- *----------------------------------------------------------------------
- */
- TkCursor *
- TkCreateCursorFromData(tkwin, source, mask, width, height, xHot, yHot,
- fgColor, bgColor)
- Tk_Window tkwin; /* Window in which cursor will be used. */
- CONST char *source; /* Bitmap data for cursor shape. */
- CONST char *mask; /* Bitmap data for cursor mask. */
- int width, height; /* Dimensions of cursor. */
- int xHot, yHot; /* Location of hot-spot in cursor. */
- XColor fgColor; /* Foreground color for cursor. */
- XColor bgColor; /* Background color for cursor. */
- {
- return NULL;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkpFreeCursor --
- *
- * This procedure is called to release a cursor allocated by
- * TkGetCursorByName.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The cursor data structure is deallocated.
- *
- *----------------------------------------------------------------------
- */
- void
- TkpFreeCursor(cursorPtr)
- TkCursor *cursorPtr;
- {
- TkWinCursor *winCursorPtr = (TkWinCursor *) cursorPtr;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkpSetCursor --
- *
- * Set the global cursor. If the cursor is None, then use the
- * default Tk cursor.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Changes the mouse cursor.
- *
- *----------------------------------------------------------------------
- */
- void
- TkpSetCursor(cursor)
- TkpCursor cursor;
- {
- HCURSOR hcursor;
- TkWinCursor *winCursor = (TkWinCursor *) cursor;
- if (winCursor == NULL || winCursor->winCursor == NULL) {
- hcursor = LoadCursor(NULL, TK_DEFAULT_CURSOR);
- } else {
- hcursor = winCursor->winCursor;
- }
- if (hcursor != NULL) {
- SetCursor(hcursor);
- }
- }