home *** CD-ROM | disk | FTP | other *** search
- /*
- * tkFrame.c --
- *
- * This module implements "frame" widgets for the Tk
- * toolkit. Frames are windows with a background color
- * and possibly a 3-D effect, but no other attributes.
- *
- * Copyright 1990 Regents of the University of California.
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkFrame.c,v 1.27 92/08/21 16:17:24 ouster Exp $ SPRITE (Berkeley)";
- #endif
-
- #include "default.h"
- #include "tkConfig.h"
- #include "tk.h"
-
- /*
- * A data structure of the following type is kept for each
- * frame that currently exists for this process:
- */
-
- typedef struct {
- Tk_Window tkwin; /* Window that embodies the frame. NULL
- * means that the window has been destroyed
- * but the data structures haven't yet been
- * cleaned up.*/
- Tcl_Interp *interp; /* Interpreter associated with
- * widget. Used to delete widget
- * command. */
- Tk_Uid screenName; /* If this window isn't a toplevel window
- * then this is NULL; otherwise it gives
- * the name of the screen on which window
- * is displayed. */
- Tk_3DBorder border; /* Structure used to draw 3-D border and
- * background. */
- int borderWidth; /* Width of 3-D border (if any). */
- int relief; /* 3-d effect: TK_RELIEF_RAISED etc. */
- int width; /* Width to request for window. <= 0 means
- * don't request any size. */
- int height; /* Height to request for window. <= 0 means
- * don't request any size. */
- char *geometry; /* Geometry that user requested. NULL
- * means use width and height instead.
- * Malloc'ed. */
- Cursor cursor; /* Current cursor for window, or None. */
- int flags; /* Various flags; see below for
- * definitions. */
- } Frame;
-
- /*
- * Flag bits for frames:
- *
- * REDRAW_PENDING: Non-zero means a DoWhenIdle handler
- * has already been queued to redraw
- * this window.
- * CLEAR_NEEDED; Need to clear the window when redrawing.
- */
-
- #define REDRAW_PENDING 1
- #define CLEAR_NEEDED 2
-
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_FRAME_BG_COLOR, Tk_Offset(Frame, border), TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_FRAME_BG_MONO, Tk_Offset(Frame, border), TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
- DEF_FRAME_BORDER_WIDTH, Tk_Offset(Frame, borderWidth), 0},
- {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
- DEF_FRAME_CURSOR, Tk_Offset(Frame, cursor), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-geometry", "geometry", "Geometry",
- DEF_FRAME_GEOMETRY, Tk_Offset(Frame, geometry), TK_CONFIG_NULL_OK},
- {TK_CONFIG_PIXELS, "-height", "height", "Height",
- DEF_FRAME_HEIGHT, Tk_Offset(Frame, height), 0},
- {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
- DEF_FRAME_RELIEF, Tk_Offset(Frame, relief), 0},
- {TK_CONFIG_PIXELS, "-width", "width", "Width",
- DEF_FRAME_WIDTH, Tk_Offset(Frame, width), 0},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
-
- /*
- * Forward declarations for procedures defined later in this file:
- */
-
- static int ConfigureFrame _ANSI_ARGS_((Tcl_Interp *interp,
- Frame *framePtr, int argc, char **argv, int flags));
- static void DestroyFrame _ANSI_ARGS_((ClientData clientData));
- static void DisplayFrame _ANSI_ARGS_((ClientData clientData));
- static void FrameEventProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static int FrameWidgetCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char **argv));
- static void MapFrame _ANSI_ARGS_((ClientData clientData));
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_FrameCmd --
- *
- * This procedure is invoked to process the "frame" and
- * "toplevel" Tcl commands. See the user documentation for
- * details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_FrameCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Main window associated with
- * interpreter. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- Tk_Window tkwin = (Tk_Window) clientData;
- Tk_Window new;
- register Frame *framePtr;
- Tk_Uid screenUid;
- char *className, *screen;
- int src, dst;
-
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " pathName ?options?\"", (char *) NULL);
- return TCL_ERROR;
- }
-
- /*
- * The code below is a special hack that extracts a few key
- * options from the argument list now, rather than letting
- * ConfigureFrame do it. This is necessary because we have
- * to know the window's screen (if it's top-level) and its
- * class before creating the window.
- */
-
- screen = NULL;
- className = (argv[0][0] == 't') ? "Toplevel" : "Frame";
- for (src = 2, dst = 2; src < argc; src += 2) {
- char c;
-
- c = argv[src][1];
- if ((c == 'c')
- && (strncmp(argv[src], "-class", strlen(argv[src])) == 0)) {
- className = argv[src+1];
- } else if ((argv[0][0] == 't') && (c == 's')
- && (strncmp(argv[src], "-screen", strlen(argv[src])) == 0)) {
- screen = argv[src+1];
- } else {
- argv[dst] = argv[src];
- argv[dst+1] = argv[src+1];
- dst += 2;
- }
- }
- argc -= src-dst;
-
- /*
- * Provide a default screen for top-level windows (same as screen
- * of parent window).
- */
-
- if ((argv[0][0] == 't') && (screen == NULL)) {
- screen = "";
- }
- if (screen != NULL) {
- screenUid = Tk_GetUid(screen);
- } else {
- screenUid = NULL;
- }
-
- /*
- * Create the window.
- */
-
- new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], screenUid);
- if (new == NULL) {
- return TCL_ERROR;
- }
-
- Tk_SetClass(new, className);
- framePtr = (Frame *) ckalloc(sizeof(Frame));
- framePtr->tkwin = new;
- framePtr->interp = interp;
- framePtr->screenName = screenUid;
- framePtr->border = NULL;
- framePtr->geometry = NULL;
- framePtr->cursor = None;
- framePtr->flags = 0;
- Tk_CreateEventHandler(framePtr->tkwin, ExposureMask|StructureNotifyMask,
- FrameEventProc, (ClientData) framePtr);
- Tcl_CreateCommand(interp, Tk_PathName(framePtr->tkwin),
- FrameWidgetCmd, (ClientData) framePtr, (void (*)()) NULL);
-
- if (ConfigureFrame(interp, framePtr, argc-2, argv+2, 0) != TCL_OK) {
- Tk_DestroyWindow(framePtr->tkwin);
- return TCL_ERROR;
- }
- if (screenUid != NULL) {
- Tk_DoWhenIdle(MapFrame, (ClientData) framePtr);
- }
- interp->result = Tk_PathName(framePtr->tkwin);
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * FrameWidgetCmd --
- *
- * This procedure is invoked to process the Tcl command
- * that corresponds to a frame widget. See the user
- * documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
-
- static int
- FrameWidgetCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Information about frame widget. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- register Frame *framePtr = (Frame *) clientData;
- int result = TCL_OK;
- int length;
- char c;
-
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " option ?arg arg ...?\"", (char *) NULL);
- return TCL_ERROR;
- }
- Tk_Preserve((ClientData) framePtr);
- c = argv[1][0];
- length = strlen(argv[1]);
- if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)) {
- if (argc == 2) {
- result = Tk_ConfigureInfo(interp, framePtr->tkwin, configSpecs,
- (char *) framePtr, (char *) NULL, 0);
- } else if (argc == 3) {
- result = Tk_ConfigureInfo(interp, framePtr->tkwin, configSpecs,
- (char *) framePtr, argv[2], 0);
- } else {
- result = ConfigureFrame(interp, framePtr, argc-2, argv+2,
- TK_CONFIG_ARGV_ONLY);
- }
- } else {
- Tcl_AppendResult(interp, "bad option \"", argv[1],
- "\": must be configure", (char *) NULL);
- result = TCL_ERROR;
- }
- Tk_Release((ClientData) framePtr);
- return result;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DestroyFrame --
- *
- * This procedure is invoked by Tk_EventuallyFree or Tk_Release
- * to clean up the internal structure of a frame at a safe time
- * (when no-one is using it anymore).
- *
- * Results:
- * None.
- *
- * Side effects:
- * Everything associated with the frame is freed up.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DestroyFrame(clientData)
- ClientData clientData; /* Info about frame widget. */
- {
- register Frame *framePtr = (Frame *) clientData;
-
- if (framePtr->border != NULL) {
- Tk_Free3DBorder(framePtr->border);
- }
- if (framePtr->geometry != NULL) {
- ckfree(framePtr->geometry);
- }
- if (framePtr->cursor != None) {
- Tk_FreeCursor(framePtr->cursor);
- }
- ckfree((char *) framePtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ConfigureFrame --
- *
- * This procedure is called to process an argv/argc list, plus
- * the Tk option database, in order to configure (or
- * reconfigure) a frame widget.
- *
- * Results:
- * The return value is a standard Tcl result. If TCL_ERROR is
- * returned, then interp->result contains an error message.
- *
- * Side effects:
- * Configuration information, such as text string, colors, font,
- * etc. get set for framePtr; old resources get freed, if there
- * were any.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- ConfigureFrame(interp, framePtr, argc, argv, flags)
- Tcl_Interp *interp; /* Used for error reporting. */
- register Frame *framePtr; /* Information about widget; may or may
- * not already have values for some fields. */
- int argc; /* Number of valid entries in argv. */
- char **argv; /* Arguments. */
- int flags; /* Flags to pass to Tk_ConfigureWidget. */
- {
- if (Tk_ConfigureWidget(interp, framePtr->tkwin, configSpecs,
- argc, argv, (char *) framePtr, flags) != TCL_OK) {
- return TCL_ERROR;
- }
-
- Tk_SetBackgroundFromBorder(framePtr->tkwin, framePtr->border);
- Tk_SetInternalBorder(framePtr->tkwin, framePtr->borderWidth);
- if (framePtr->geometry != NULL) {
- int height, width;
-
- if (sscanf(framePtr->geometry, "%dx%d", &width, &height) != 2) {
- Tcl_AppendResult(interp, "bad geometry \"", framePtr->geometry,
- "\": expected widthxheight", (char *) NULL);
- return TCL_ERROR;
- }
- Tk_GeometryRequest(framePtr->tkwin, width, height);
- } else if ((framePtr->width > 0) && (framePtr->height > 0)) {
- Tk_GeometryRequest(framePtr->tkwin, framePtr->width,
- framePtr->height);
- }
-
- if (Tk_IsMapped(framePtr->tkwin)
- && !(framePtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayFrame, (ClientData) framePtr);
- framePtr->flags |= REDRAW_PENDING|CLEAR_NEEDED;
- }
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DisplayFrame --
- *
- * This procedure is invoked to display a frame widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Commands are output to X to display the frame in its
- * current mode.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DisplayFrame(clientData)
- ClientData clientData; /* Information about widget. */
- {
- register Frame *framePtr = (Frame *) clientData;
- register Tk_Window tkwin = framePtr->tkwin;
-
- framePtr->flags &= ~REDRAW_PENDING;
- if ((framePtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
- return;
- }
-
- if (framePtr->flags & CLEAR_NEEDED) {
- XClearWindow(Tk_Display(tkwin), Tk_WindowId(tkwin));
- framePtr->flags &= ~CLEAR_NEEDED;
- }
- if ((framePtr->border != NULL)
- && (framePtr->relief != TK_RELIEF_FLAT)) {
- Tk_Draw3DRectangle(Tk_Display(tkwin), Tk_WindowId(tkwin),
- framePtr->border, 0, 0, Tk_Width(tkwin), Tk_Height(tkwin),
- framePtr->borderWidth, framePtr->relief);
- }
- }
-
- /*
- *--------------------------------------------------------------
- *
- * FrameEventProc --
- *
- * This procedure is invoked by the Tk dispatcher on
- * structure changes to a frame. For frames with 3D
- * borders, this procedure is also invoked for exposures.
- *
- * Results:
- * None.
- *
- * Side effects:
- * When the window gets deleted, internal structures get
- * cleaned up. When it gets exposed, it is redisplayed.
- *
- *--------------------------------------------------------------
- */
-
- static void
- FrameEventProc(clientData, eventPtr)
- ClientData clientData; /* Information about window. */
- register XEvent *eventPtr; /* Information about event. */
- {
- register Frame *framePtr = (Frame *) clientData;
-
- if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
- if ((framePtr->relief != TK_RELIEF_FLAT) && (framePtr->tkwin != NULL)
- && !(framePtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayFrame, (ClientData) framePtr);
- framePtr->flags |= REDRAW_PENDING;
- }
- } else if (eventPtr->type == DestroyNotify) {
- Tcl_DeleteCommand(framePtr->interp, Tk_PathName(framePtr->tkwin));
- framePtr->tkwin = NULL;
- if (framePtr->flags & REDRAW_PENDING) {
- Tk_CancelIdleCall(DisplayFrame, (ClientData) framePtr);
- }
- Tk_CancelIdleCall(MapFrame, (ClientData) framePtr);
- Tk_EventuallyFree((ClientData) framePtr, DestroyFrame);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * MapFrame --
- *
- * This procedure is invoked as a when-idle handler to map a
- * newly-created top-level frame.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The frame given by the clientData argument is mapped.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- MapFrame(clientData)
- ClientData clientData; /* Pointer to frame structure. */
- {
- Frame *framePtr = (Frame *) clientData;
-
- /*
- * Wait for all other background events to be processed before
- * mapping window. This ensures that the window's correct geometry
- * will have been determined before it is first mapped, so that the
- * window manager doesn't get a false idea of its desired geometry.
- */
-
- do {
- if (Tk_DoOneEvent(TK_IDLE_EVENTS) == 0) {
- break;
- }
-
- /*
- * After each event, make sure that the window still exists,
- * and quit if the window has been destroyed.
- */
-
- if (framePtr->tkwin == NULL) {
- return;
- }
- } while (1);
- Tk_MapWindow(framePtr->tkwin);
- }
-