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- /*
- * tkUtil.c --
- *
- * This file contains miscellaneous utility procedures that
- * are used by the rest of Tk, such as a procedure for drawing
- * a focus highlight.
- *
- * Copyright (c) 1994 The Regents of the University of California.
- * Copyright (c) 1994-1995 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
- static char sccsid[] = "@(#) tkUtil.c 1.6 95/02/20 11:44:58";
- #include "tk.h"
- #include "tkPort.h"
-
- /*
- *----------------------------------------------------------------------
- *
- * Tk_DrawFocusHighlight --
- *
- * This procedure draws a rectangular ring around the outside of
- * a widget to indicate that it has received the input focus.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A rectangle "width" pixels wide is drawn in "drawable",
- * corresponding to the outer area of "tkwin".
- *
- *----------------------------------------------------------------------
- */
-
- void
- Tk_DrawFocusHighlight(tkwin, gc, width, drawable)
- Tk_Window tkwin; /* Window whose focus highlight ring is
- * to be drawn. */
- GC gc; /* Graphics context to use for drawing
- * the highlight ring. */
- int width; /* Width of the highlight ring, in pixels. */
- Drawable drawable; /* Where to draw the ring (typically a
- * pixmap for double buffering). */
- {
- XRectangle rects[4];
-
- rects[0].x = 0;
- rects[0].y = 0;
- rects[0].width = Tk_Width(tkwin);
- rects[0].height = width;
- rects[1].x = 0;
- rects[1].y = Tk_Height(tkwin) - width;
- rects[1].width = Tk_Width(tkwin);
- rects[1].height = width;
- rects[2].x = 0;
- rects[2].y = width;
- rects[2].width = width;
- rects[2].height = Tk_Height(tkwin) - 2*width;
- rects[3].x = Tk_Width(tkwin) - width;
- rects[3].y = width;
- rects[3].width = width;
- rects[3].height = rects[2].height;
- XFillRectangles(Tk_Display(tkwin), drawable, gc, rects, 4);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tk_GetScrollInfo --
- *
- * This procedure is invoked to parse "xview" and "yview"
- * scrolling commands for widgets using the new scrolling
- * command syntax ("moveto" or "scroll" options).
- *
- * Results:
- * The return value is either TK_SCROLL_MOVETO, TK_SCROLL_PAGES,
- * TK_SCROLL_UNITS, or TK_SCROLL_ERROR. This indicates whether
- * the command was successfully parsed and what form the command
- * took. If TK_SCROLL_MOVETO, *dblPtr is filled in with the
- * desired position; if TK_SCROLL_PAGES or TK_SCROLL_UNITS,
- * *intPtr is filled in with the number of lines to move (may be
- * negative); if TK_SCROLL_ERROR, interp->result contains an
- * error message.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- int
- Tk_GetScrollInfo(interp, argc, argv, dblPtr, intPtr)
- Tcl_Interp *interp; /* Used for error reporting. */
- int argc; /* # arguments for command. */
- char **argv; /* Arguments for command. */
- double *dblPtr; /* Filled in with argument "moveto"
- * option, if any. */
- int *intPtr; /* Filled in with number of pages
- * or lines to scroll, if any. */
- {
- int c;
- size_t length;
-
- length = strlen(argv[2]);
- c = argv[2][0];
- if ((c == 'm') && (strncmp(argv[2], "moveto", length) == 0)) {
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " ", argv[1], " moveto fraction\"",
- (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- if (Tcl_GetDouble(interp, argv[3], dblPtr) != TCL_OK) {
- return TK_SCROLL_ERROR;
- }
- return TK_SCROLL_MOVETO;
- } else if ((c == 's')
- && (strncmp(argv[2], "scroll", length) == 0)) {
- if (argc != 5) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " ", argv[1], " scroll number units|pages\"",
- (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- if (Tcl_GetInt(interp, argv[3], intPtr) != TCL_OK) {
- return TK_SCROLL_ERROR;
- }
- length = strlen(argv[4]);
- c = argv[4][0];
- if ((c == 'p') && (strncmp(argv[4], "pages", length) == 0)) {
- return TK_SCROLL_PAGES;
- } else if ((c == 'u')
- && (strncmp(argv[4], "units", length) == 0)) {
- return TK_SCROLL_UNITS;
- } else {
- Tcl_AppendResult(interp, "bad argument \"", argv[4],
- "\": must be units or pages", (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- }
- Tcl_AppendResult(interp, "unknown option \"", argv[2],
- "\": must be moveto or scroll", (char *) NULL);
- return TK_SCROLL_ERROR;
- }
-