archie/tk4.2/win/tkWinCursor.c
2024-05-27 16:40:40 +02:00

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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.
*
* SCCS: @(#) tkWinCursor.c 1.6 96/02/15 18:56:06
*/
#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 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_SIZE},
{"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_SIZE},
{"sb_v_double_arrow", IDC_SIZENS},
{"sb_h_double_arrow", IDC_SIZEWE},
{"center_ptr", IDC_UPARROW},
{"watch", IDC_WAIT},
{"xterm", IDC_IBEAM},
{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;
/*
* Check for the cursor in the system cursor set.
*/
for (namePtr = cursorNames; namePtr->name != NULL; namePtr++) {
if (strcmp(namePtr->name, string) == 0) {
break;
}
}
cursorPtr = (TkWinCursor *) ckalloc(sizeof(TkWinCursor));
cursorPtr->info.cursor = (Tk_Cursor) cursorPtr;
if (namePtr->name != NULL) {
cursorPtr->winCursor = LoadCursor(NULL, namePtr->id);
cursorPtr->system = 1;
} else {
cursorPtr->winCursor = LoadCursor(TkWinGetTkModule(), string);
cursorPtr->system = 0;
}
if (cursorPtr->winCursor == NULL) {
ckfree((char *)cursorPtr);
Tcl_AppendResult(interp, "bad cursor spec \"", string, "\"",
(char *) NULL);
return NULL;
} else {
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. */
char *source; /* Bitmap data for cursor shape. */
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;
}
/*
*----------------------------------------------------------------------
*
* TkFreeCursor --
*
* This procedure is called to release a cursor allocated by
* TkGetCursorByName.
*
* Results:
* None.
*
* Side effects:
* The cursor data structure is deallocated.
*
*----------------------------------------------------------------------
*/
void
TkFreeCursor(cursorPtr)
TkCursor *cursorPtr;
{
TkWinCursor *winCursorPtr = (TkWinCursor *) cursorPtr;
ckfree((char *) winCursorPtr);
}
/*
*----------------------------------------------------------------------
*
* TkWinUpdateCursor --
*
* Set the windows global cursor to the cursor associated with
* the given Tk window.
*
* Results:
* None.
*
* Side effects:
* Changes the mouse cursor.
*
*----------------------------------------------------------------------
*/
void
TkWinUpdateCursor(winPtr)
TkWindow *winPtr;
{
HCURSOR cursor = NULL;
/*
* A window inherits its cursor from its parent if it doesn't
* have one of its own. Top level windows inherit the default
* cursor.
*/
while (winPtr != NULL) {
if (winPtr->atts.cursor != None) {
cursor = ((TkWinCursor *) winPtr->atts.cursor)->winCursor;
break;
} else if (winPtr->flags & TK_TOP_LEVEL) {
cursor = LoadCursor(NULL, TK_DEFAULT_CURSOR);
break;
}
winPtr = winPtr->parentPtr;
}
if (cursor != NULL) {
SetCursor(cursor);
}
}