tkPack.c
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上传日期:2015-12-11
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- /*
- * tkPack.c --
- *
- * This file contains code to implement the "packer"
- * geometry manager for Tk.
- *
- * Copyright (c) 1990-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 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: tkPack.c,v 1.16.2.3 2005/08/11 12:17:09 dkf Exp $
- */
- #include "tkPort.h"
- #include "tkInt.h"
- typedef enum {TOP, BOTTOM, LEFT, RIGHT} Side;
- static CONST char *sideNames[] = {
- "top", "bottom", "left", "right", (char *) NULL
- };
- /* For each window that the packer cares about (either because
- * the window is managed by the packer or because the window
- * has slaves that are managed by the packer), there is a
- * structure of the following type:
- */
- typedef struct Packer {
- Tk_Window tkwin; /* Tk token for window. NULL means that
- * the window has been deleted, but the
- * packet hasn't had a chance to clean up
- * yet because the structure is still in
- * use. */
- struct Packer *masterPtr; /* Master window within which this window
- * is packed (NULL means this window
- * isn't managed by the packer). */
- struct Packer *nextPtr; /* Next window packed within same
- * parent. List is priority-ordered:
- * first on list gets packed first. */
- struct Packer *slavePtr; /* First in list of slaves packed
- * inside this window (NULL means
- * no packed slaves). */
- Side side; /* Side of parent against which
- * this window is packed. */
- Tk_Anchor anchor; /* If frame allocated for window is larger
- * than window needs, this indicates how
- * where to position window in frame. */
- int padX, padY; /* Total additional pixels to leave around the
- * window. Some is of this space is on each
- * side. This is space *outside* the window:
- * we'll allocate extra space in frame but
- * won't enlarge window). */
- int padLeft, padTop; /* The part of padX or padY to use on the
- * left or top of the widget, respectively.
- * By default, this is half of padX or padY. */
- int iPadX, iPadY; /* Total extra pixels to allocate inside the
- * window (half of this amount will appear on
- * each side). */
- int doubleBw; /* Twice the window's last known border
- * width. If this changes, the window
- * must be repacked within its parent. */
- int *abortPtr; /* If non-NULL, it means that there is a nested
- * call to ArrangePacking already working on
- * this window. *abortPtr may be set to 1 to
- * abort that nested call. This happens, for
- * example, if tkwin or any of its slaves
- * is deleted. */
- int flags; /* Miscellaneous flags; see below
- * for definitions. */
- } Packer;
- /*
- * Flag values for Packer structures:
- *
- * REQUESTED_REPACK: 1 means a Tcl_DoWhenIdle request
- * has already been made to repack
- * all the slaves of this window.
- * FILLX: 1 means if frame allocated for window
- * is wider than window needs, expand window
- * to fill frame. 0 means don't make window
- * any larger than needed.
- * FILLY: Same as FILLX, except for height.
- * EXPAND: 1 means this window's frame will absorb any
- * extra space in the parent window.
- * OLD_STYLE: 1 means this window is being managed with
- * the old-style packer algorithms (before
- * Tk version 3.3). The main difference is
- * that padding and filling are done differently.
- * DONT_PROPAGATE: 1 means don't set this window's requested
- * size. 0 means if this window is a master
- * then Tk will set its requested size to fit
- * the needs of its slaves.
- */
- #define REQUESTED_REPACK 1
- #define FILLX 2
- #define FILLY 4
- #define EXPAND 8
- #define OLD_STYLE 16
- #define DONT_PROPAGATE 32
- /*
- * The following structure is the official type record for the
- * packer:
- */
- static void PackReqProc _ANSI_ARGS_((ClientData clientData,
- Tk_Window tkwin));
- static void PackLostSlaveProc _ANSI_ARGS_((ClientData clientData,
- Tk_Window tkwin));
- static Tk_GeomMgr packerType = {
- "pack", /* name */
- PackReqProc, /* requestProc */
- PackLostSlaveProc, /* lostSlaveProc */
- };
- /*
- * Forward declarations for procedures defined later in this file:
- */
- static void ArrangePacking _ANSI_ARGS_((ClientData clientData));
- static int ConfigureSlaves _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Window tkwin, int objc, Tcl_Obj *CONST objv[]));
- static void DestroyPacker _ANSI_ARGS_((char *memPtr));
- static Packer * GetPacker _ANSI_ARGS_((Tk_Window tkwin));
- static int PackAfter _ANSI_ARGS_((Tcl_Interp *interp,
- Packer *prevPtr, Packer *masterPtr, int objc,
- Tcl_Obj *CONST objv[]));
- static void PackReqProc _ANSI_ARGS_((ClientData clientData,
- Tk_Window tkwin));
- static void PackStructureProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static void Unlink _ANSI_ARGS_((Packer *packPtr));
- static int XExpansion _ANSI_ARGS_((Packer *slavePtr,
- int cavityWidth));
- static int YExpansion _ANSI_ARGS_((Packer *slavePtr,
- int cavityHeight));
- /*
- *--------------------------------------------------------------
- *
- * TkPrintPadAmount --
- *
- * This procedure generates a text value that describes one
- * of the -padx, -pady, -ipadx, or -ipady configuration options.
- * The text value generated is appended to the interpreter
- * result.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- void
- TkPrintPadAmount(interp, switchName, halfSpace, allSpace)
- Tcl_Interp *interp; /* The interpreter into which the result
- * is written. */
- char *switchName; /* One of "padx", "pady", "ipadx" or "ipady" */
- int halfSpace; /* The left or top padding amount */
- int allSpace; /* The total amount of padding */
- {
- char buffer[60 + 2*TCL_INTEGER_SPACE];
- if (halfSpace*2 == allSpace) {
- sprintf(buffer, " -%.10s %d", switchName, halfSpace);
- } else {
- sprintf(buffer, " -%.10s {%d %d}", switchName, halfSpace,
- allSpace - halfSpace);
- }
- Tcl_AppendResult(interp, buffer, (char *)NULL);
- }
- /*
- *--------------------------------------------------------------
- *
- * Tk_PackCmd --
- *
- * This procedure is invoked to process the "pack" Tcl command.
- * See the user documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
- int
- Tk_PackObjCmd(clientData, interp, objc, objv)
- ClientData clientData; /* Main window associated with
- * interpreter. */
- Tcl_Interp *interp; /* Current interpreter. */
- int objc; /* Number of arguments. */
- Tcl_Obj *CONST objv[]; /* Argument objects. */
- {
- Tk_Window tkwin = (Tk_Window) clientData;
- char *argv2;
- static CONST char *optionStrings[] = {
- /* after, append, before and unpack are deprecated */
- "after", "append", "before", "unpack",
- "configure", "forget", "info", "propagate", "slaves", (char *) NULL };
- enum options {
- PACK_AFTER, PACK_APPEND, PACK_BEFORE, PACK_UNPACK,
- PACK_CONFIGURE, PACK_FORGET, PACK_INFO, PACK_PROPAGATE, PACK_SLAVES };
- int index;
- if (objc >= 2) {
- char *string = Tcl_GetString(objv[1]);
- if (string[0] == '.') {
- return ConfigureSlaves(interp, tkwin, objc-1, objv+1);
- }
- }
- if (objc < 3) {
- Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg ...?");
- return TCL_ERROR;
- }
- if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0,
- &index) != TCL_OK) {
- /*
- * Call it again without the deprecated ones to get a proper
- * error message.
- * This works well since there can't be any ambiguity between
- * deprecated and new options.
- */
- Tcl_ResetResult(interp);
- Tcl_GetIndexFromObj(interp, objv[1], &optionStrings[4], "option", 0,
- &index);
- return TCL_ERROR;
- }
- argv2 = Tcl_GetString(objv[2]);
- if (index == PACK_AFTER) {
- Packer *prevPtr;
- Tk_Window tkwin2;
- if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) {
- return TCL_ERROR;
- }
- prevPtr = GetPacker(tkwin2);
- if (prevPtr->masterPtr == NULL) {
- Tcl_AppendResult(interp, "window "", argv2,
- "" isn't packed", (char *) NULL);
- return TCL_ERROR;
- }
- return PackAfter(interp, prevPtr, prevPtr->masterPtr, objc-3, objv+3);
- } else if (index == PACK_APPEND) {
- Packer *masterPtr;
- register Packer *prevPtr;
- Tk_Window tkwin2;
- if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) {
- return TCL_ERROR;
- }
- masterPtr = GetPacker(tkwin2);
- prevPtr = masterPtr->slavePtr;
- if (prevPtr != NULL) {
- while (prevPtr->nextPtr != NULL) {
- prevPtr = prevPtr->nextPtr;
- }
- }
- return PackAfter(interp, prevPtr, masterPtr, objc-3, objv+3);
- } else if (index == PACK_BEFORE) {
- Packer *packPtr, *masterPtr;
- register Packer *prevPtr;
- Tk_Window tkwin2;
- if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) {
- return TCL_ERROR;
- }
- packPtr = GetPacker(tkwin2);
- if (packPtr->masterPtr == NULL) {
- Tcl_AppendResult(interp, "window "", argv2,
- "" isn't packed", (char *) NULL);
- return TCL_ERROR;
- }
- masterPtr = packPtr->masterPtr;
- prevPtr = masterPtr->slavePtr;
- if (prevPtr == packPtr) {
- prevPtr = NULL;
- } else {
- for ( ; ; prevPtr = prevPtr->nextPtr) {
- if (prevPtr == NULL) {
- panic(""pack before" couldn't find predecessor");
- }
- if (prevPtr->nextPtr == packPtr) {
- break;
- }
- }
- }
- return PackAfter(interp, prevPtr, masterPtr, objc-3, objv+3);
- } else if (index == PACK_CONFIGURE) {
- if (argv2[0] != '.') {
- Tcl_AppendResult(interp, "bad argument "", argv2,
- "": must be name of window", (char *) NULL);
- return TCL_ERROR;
- }
- return ConfigureSlaves(interp, tkwin, objc-2, objv+2);
- } else if (index == PACK_FORGET) {
- Tk_Window slave;
- Packer *slavePtr;
- int i;
- for (i = 2; i < objc; i++) {
- if (TkGetWindowFromObj(interp, tkwin, objv[i], &slave) != TCL_OK) {
- continue;
- }
- slavePtr = GetPacker(slave);
- if ((slavePtr != NULL) && (slavePtr->masterPtr != NULL)) {
- Tk_ManageGeometry(slave, (Tk_GeomMgr *) NULL,
- (ClientData) NULL);
- if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) {
- Tk_UnmaintainGeometry(slavePtr->tkwin,
- slavePtr->masterPtr->tkwin);
- }
- Unlink(slavePtr);
- Tk_UnmapWindow(slavePtr->tkwin);
- }
- }
- } else if (index == PACK_INFO) {
- register Packer *slavePtr;
- Tk_Window slave;
- if (objc != 3) {
- Tcl_WrongNumArgs(interp, 2, objv, "window");
- return TCL_ERROR;
- }
- if (TkGetWindowFromObj(interp, tkwin, objv[2], &slave) != TCL_OK) {
- return TCL_ERROR;
- }
- slavePtr = GetPacker(slave);
- if (slavePtr->masterPtr == NULL) {
- Tcl_AppendResult(interp, "window "", argv2,
- "" isn't packed", (char *) NULL);
- return TCL_ERROR;
- }
- Tcl_AppendElement(interp, "-in");
- Tcl_AppendElement(interp, Tk_PathName(slavePtr->masterPtr->tkwin));
- Tcl_AppendElement(interp, "-anchor");
- Tcl_AppendElement(interp, Tk_NameOfAnchor(slavePtr->anchor));
- Tcl_AppendResult(interp, " -expand ",
- (slavePtr->flags & EXPAND) ? "1" : "0", " -fill ",
- (char *) NULL);
- switch (slavePtr->flags & (FILLX|FILLY)) {
- case 0:
- Tcl_AppendResult(interp, "none", (char *) NULL);
- break;
- case FILLX:
- Tcl_AppendResult(interp, "x", (char *) NULL);
- break;
- case FILLY:
- Tcl_AppendResult(interp, "y", (char *) NULL);
- break;
- case FILLX|FILLY:
- Tcl_AppendResult(interp, "both", (char *) NULL);
- break;
- }
- TkPrintPadAmount(interp, "ipadx", slavePtr->iPadX/2, slavePtr->iPadX);
- TkPrintPadAmount(interp, "ipady", slavePtr->iPadY/2, slavePtr->iPadY);
- TkPrintPadAmount(interp, "padx", slavePtr->padLeft, slavePtr->padX);
- TkPrintPadAmount(interp, "pady", slavePtr->padTop, slavePtr->padY);
- Tcl_AppendResult(interp, " -side ", sideNames[slavePtr->side],
- (char *) NULL);
- } else if (index == PACK_PROPAGATE) {
- Tk_Window master;
- Packer *masterPtr;
- int propagate;
- if (objc > 4) {
- Tcl_WrongNumArgs(interp, 2, objv, "window ?boolean?");
- return TCL_ERROR;
- }
- if (TkGetWindowFromObj(interp, tkwin, objv[2], &master) != TCL_OK) {
- return TCL_ERROR;
- }
- masterPtr = GetPacker(master);
- if (objc == 3) {
- Tcl_SetObjResult(interp,
- Tcl_NewBooleanObj(!(masterPtr->flags & DONT_PROPAGATE)));
- return TCL_OK;
- }
- if (Tcl_GetBooleanFromObj(interp, objv[3], &propagate) != TCL_OK) {
- return TCL_ERROR;
- }
- if (propagate) {
- masterPtr->flags &= ~DONT_PROPAGATE;
- /*
- * Repack the master to allow new geometry information to
- * propagate upwards to the master's master.
- */
- if (masterPtr->abortPtr != NULL) {
- *masterPtr->abortPtr = 1;
- }
- if (!(masterPtr->flags & REQUESTED_REPACK)) {
- masterPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) masterPtr);
- }
- } else {
- masterPtr->flags |= DONT_PROPAGATE;
- }
- } else if (index == PACK_SLAVES) {
- Tk_Window master;
- Packer *masterPtr, *slavePtr;
- if (objc != 3) {
- Tcl_WrongNumArgs(interp, 2, objv, "window");
- return TCL_ERROR;
- }
- if (TkGetWindowFromObj(interp, tkwin, objv[2], &master) != TCL_OK) {
- return TCL_ERROR;
- }
- masterPtr = GetPacker(master);
- for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
- slavePtr = slavePtr->nextPtr) {
- Tcl_AppendElement(interp, Tk_PathName(slavePtr->tkwin));
- }
- } else if (index == PACK_UNPACK) {
- Tk_Window tkwin2;
- Packer *packPtr;
- if (objc != 3) {
- Tcl_WrongNumArgs(interp, 2, objv, "window");
- return TCL_ERROR;
- }
- if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) {
- return TCL_ERROR;
- }
- packPtr = GetPacker(tkwin2);
- if ((packPtr != NULL) && (packPtr->masterPtr != NULL)) {
- Tk_ManageGeometry(tkwin2, (Tk_GeomMgr *) NULL,
- (ClientData) NULL);
- if (packPtr->masterPtr->tkwin != Tk_Parent(packPtr->tkwin)) {
- Tk_UnmaintainGeometry(packPtr->tkwin,
- packPtr->masterPtr->tkwin);
- }
- Unlink(packPtr);
- Tk_UnmapWindow(packPtr->tkwin);
- }
- }
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * PackReqProc --
- *
- * This procedure is invoked by Tk_GeometryRequest for
- * windows managed by the packer.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Arranges for tkwin, and all its managed siblings, to
- * be re-packed at the next idle point.
- *
- *--------------------------------------------------------------
- */
- /* ARGSUSED */
- static void
- PackReqProc(clientData, tkwin)
- ClientData clientData; /* Packer's information about
- * window that got new preferred
- * geometry. */
- Tk_Window tkwin; /* Other Tk-related information
- * about the window. */
- {
- register Packer *packPtr = (Packer *) clientData;
- packPtr = packPtr->masterPtr;
- if (!(packPtr->flags & REQUESTED_REPACK)) {
- packPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) packPtr);
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * PackLostSlaveProc --
- *
- * This procedure is invoked by Tk whenever some other geometry
- * claims control over a slave that used to be managed by us.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Forgets all packer-related information about the slave.
- *
- *--------------------------------------------------------------
- */
- /* ARGSUSED */
- static void
- PackLostSlaveProc(clientData, tkwin)
- ClientData clientData; /* Packer structure for slave window that
- * was stolen away. */
- Tk_Window tkwin; /* Tk's handle for the slave window. */
- {
- register Packer *slavePtr = (Packer *) clientData;
- if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) {
- Tk_UnmaintainGeometry(slavePtr->tkwin, slavePtr->masterPtr->tkwin);
- }
- Unlink(slavePtr);
- Tk_UnmapWindow(slavePtr->tkwin);
- }
- /*
- *--------------------------------------------------------------
- *
- * ArrangePacking --
- *
- * This procedure is invoked (using the Tcl_DoWhenIdle
- * mechanism) to re-layout a set of windows managed by
- * the packer. It is invoked at idle time so that a
- * series of packer requests can be merged into a single
- * layout operation.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The packed slaves of masterPtr may get resized or
- * moved.
- *
- *--------------------------------------------------------------
- */
- static void
- ArrangePacking(clientData)
- ClientData clientData; /* Structure describing parent whose slaves
- * are to be re-layed out. */
- {
- register Packer *masterPtr = (Packer *) clientData;
- register Packer *slavePtr;
- int cavityX, cavityY, cavityWidth, cavityHeight;
- /* These variables keep track of the
- * as-yet-unallocated space remaining in
- * the middle of the parent window. */
- int frameX, frameY, frameWidth, frameHeight;
- /* These variables keep track of the frame
- * allocated to the current window. */
- int x, y, width, height; /* These variables are used to hold the
- * actual geometry of the current window. */
- int abort; /* May get set to non-zero to abort this
- * repacking operation. */
- int borderX, borderY;
- int borderTop, borderBtm;
- int borderLeft, borderRight;
- int maxWidth, maxHeight, tmp;
- masterPtr->flags &= ~REQUESTED_REPACK;
- /*
- * If the parent has no slaves anymore, then don't do anything
- * at all: just leave the parent's size as-is.
- */
- if (masterPtr->slavePtr == NULL) {
- return;
- }
- /*
- * Abort any nested call to ArrangePacking for this window, since
- * we'll do everything necessary here, and set up so this call
- * can be aborted if necessary.
- */
- if (masterPtr->abortPtr != NULL) {
- *masterPtr->abortPtr = 1;
- }
- masterPtr->abortPtr = &abort;
- abort = 0;
- Tcl_Preserve((ClientData) masterPtr);
- /*
- * Pass #1: scan all the slaves to figure out the total amount
- * of space needed. Two separate width and height values are
- * computed:
- *
- * width - Holds the sum of the widths (plus padding) of
- * all the slaves seen so far that were packed LEFT
- * or RIGHT.
- * height - Holds the sum of the heights (plus padding) of
- * all the slaves seen so far that were packed TOP
- * or BOTTOM.
- *
- * maxWidth - Gradually builds up the width needed by the master
- * to just barely satisfy all the slave's needs. For
- * each slave, the code computes the width needed for
- * all the slaves so far and updates maxWidth if the
- * new value is greater.
- * maxHeight - Same as maxWidth, except keeps height info.
- */
- width = maxWidth = Tk_InternalBorderLeft(masterPtr->tkwin) +
- Tk_InternalBorderRight(masterPtr->tkwin);
- height = maxHeight = Tk_InternalBorderTop(masterPtr->tkwin) +
- Tk_InternalBorderBottom(masterPtr->tkwin);
- for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
- slavePtr = slavePtr->nextPtr) {
- if ((slavePtr->side == TOP) || (slavePtr->side == BOTTOM)) {
- tmp = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padX + slavePtr->iPadX + width;
- if (tmp > maxWidth) {
- maxWidth = tmp;
- }
- height += Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padY + slavePtr->iPadY;
- } else {
- tmp = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padY + slavePtr->iPadY + height;
- if (tmp > maxHeight) {
- maxHeight = tmp;
- }
- width += Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padX + slavePtr->iPadX;
- }
- }
- if (width > maxWidth) {
- maxWidth = width;
- }
- if (height > maxHeight) {
- maxHeight = height;
- }
- if (maxWidth < Tk_MinReqWidth(masterPtr->tkwin)) {
- maxWidth = Tk_MinReqWidth(masterPtr->tkwin);
- }
- if (maxHeight < Tk_MinReqHeight(masterPtr->tkwin)) {
- maxHeight = Tk_MinReqHeight(masterPtr->tkwin);
- }
- /*
- * If the total amount of space needed in the parent window has
- * changed, and if we're propagating geometry information, then
- * notify the next geometry manager up and requeue ourselves to
- * start again after the parent has had a chance to
- * resize us.
- */
- if (((maxWidth != Tk_ReqWidth(masterPtr->tkwin))
- || (maxHeight != Tk_ReqHeight(masterPtr->tkwin)))
- && !(masterPtr->flags & DONT_PROPAGATE)) {
- Tk_GeometryRequest(masterPtr->tkwin, maxWidth, maxHeight);
- masterPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) masterPtr);
- goto done;
- }
- /*
- * Pass #2: scan the slaves a second time assigning
- * new sizes. The "cavity" variables keep track of the
- * unclaimed space in the cavity of the window; this
- * shrinks inward as we allocate windows around the
- * edges. The "frame" variables keep track of the space
- * allocated to the current window and its frame. The
- * current window is then placed somewhere inside the
- * frame, depending on anchor.
- */
- cavityX = x = Tk_InternalBorderLeft(masterPtr->tkwin);
- cavityY = y = Tk_InternalBorderTop(masterPtr->tkwin);
- cavityWidth = Tk_Width(masterPtr->tkwin) -
- Tk_InternalBorderLeft(masterPtr->tkwin) -
- Tk_InternalBorderRight(masterPtr->tkwin);
- cavityHeight = Tk_Height(masterPtr->tkwin) -
- Tk_InternalBorderTop(masterPtr->tkwin) -
- Tk_InternalBorderBottom(masterPtr->tkwin);
- for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
- slavePtr = slavePtr->nextPtr) {
- if ((slavePtr->side == TOP) || (slavePtr->side == BOTTOM)) {
- frameWidth = cavityWidth;
- frameHeight = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padY + slavePtr->iPadY;
- if (slavePtr->flags & EXPAND) {
- frameHeight += YExpansion(slavePtr, cavityHeight);
- }
- cavityHeight -= frameHeight;
- if (cavityHeight < 0) {
- frameHeight += cavityHeight;
- cavityHeight = 0;
- }
- frameX = cavityX;
- if (slavePtr->side == TOP) {
- frameY = cavityY;
- cavityY += frameHeight;
- } else {
- frameY = cavityY + cavityHeight;
- }
- } else {
- frameHeight = cavityHeight;
- frameWidth = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padX + slavePtr->iPadX;
- if (slavePtr->flags & EXPAND) {
- frameWidth += XExpansion(slavePtr, cavityWidth);
- }
- cavityWidth -= frameWidth;
- if (cavityWidth < 0) {
- frameWidth += cavityWidth;
- cavityWidth = 0;
- }
- frameY = cavityY;
- if (slavePtr->side == LEFT) {
- frameX = cavityX;
- cavityX += frameWidth;
- } else {
- frameX = cavityX + cavityWidth;
- }
- }
- /*
- * Now that we've got the size of the frame for the window,
- * compute the window's actual size and location using the
- * fill, padding, and frame factors. The variables "borderX"
- * and "borderY" are used to handle the differences between
- * old-style packing and the new style (in old-style, iPadX
- * and iPadY are always zero and padding is completely ignored
- * except when computing frame size).
- */
- if (slavePtr->flags & OLD_STYLE) {
- borderX = borderY = 0;
- borderTop = borderBtm = 0;
- borderLeft = borderRight = 0;
- } else {
- borderX = slavePtr->padX;
- borderY = slavePtr->padY;
- borderLeft = slavePtr->padLeft;
- borderRight = borderX - borderLeft;
- borderTop = slavePtr->padTop;
- borderBtm = borderY - borderTop;
- }
- width = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->iPadX;
- if ((slavePtr->flags & FILLX)
- || (width > (frameWidth - borderX))) {
- width = frameWidth - borderX;
- }
- height = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->iPadY;
- if ((slavePtr->flags & FILLY)
- || (height > (frameHeight - borderY))) {
- height = frameHeight - borderY;
- }
- switch (slavePtr->anchor) {
- case TK_ANCHOR_N:
- x = frameX + (borderLeft + frameWidth - width - borderRight)/2;
- y = frameY + borderTop;
- break;
- case TK_ANCHOR_NE:
- x = frameX + frameWidth - width - borderRight;
- y = frameY + borderTop;
- break;
- case TK_ANCHOR_E:
- x = frameX + frameWidth - width - borderRight;
- y = frameY + (borderTop + frameHeight - height - borderBtm)/2;
- break;
- case TK_ANCHOR_SE:
- x = frameX + frameWidth - width - borderRight;
- y = frameY + frameHeight - height - borderBtm;
- break;
- case TK_ANCHOR_S:
- x = frameX + (borderLeft + frameWidth - width - borderRight)/2;
- y = frameY + frameHeight - height - borderBtm;
- break;
- case TK_ANCHOR_SW:
- x = frameX + borderLeft;
- y = frameY + frameHeight - height - borderBtm;
- break;
- case TK_ANCHOR_W:
- x = frameX + borderLeft;
- y = frameY + (borderTop + frameHeight - height - borderBtm)/2;
- break;
- case TK_ANCHOR_NW:
- x = frameX + borderLeft;
- y = frameY + borderTop;
- break;
- case TK_ANCHOR_CENTER:
- x = frameX + (borderLeft + frameWidth - width - borderRight)/2;
- y = frameY + (borderTop + frameHeight - height - borderBtm)/2;
- break;
- default:
- panic("bad frame factor in ArrangePacking");
- }
- width -= slavePtr->doubleBw;
- height -= slavePtr->doubleBw;
- /*
- * The final step is to set the position, size, and mapped/unmapped
- * state of the slave. If the slave is a child of the master, then
- * do this here. Otherwise let Tk_MaintainGeometry do the work.
- */
- if (masterPtr->tkwin == Tk_Parent(slavePtr->tkwin)) {
- if ((width <= 0) || (height <= 0)) {
- Tk_UnmapWindow(slavePtr->tkwin);
- } else {
- if ((x != Tk_X(slavePtr->tkwin))
- || (y != Tk_Y(slavePtr->tkwin))
- || (width != Tk_Width(slavePtr->tkwin))
- || (height != Tk_Height(slavePtr->tkwin))) {
- Tk_MoveResizeWindow(slavePtr->tkwin, x, y, width, height);
- }
- if (abort) {
- goto done;
- }
- /*
- * Don't map the slave if the master isn't mapped: wait
- * until the master gets mapped later.
- */
- if (Tk_IsMapped(masterPtr->tkwin)) {
- Tk_MapWindow(slavePtr->tkwin);
- }
- }
- } else {
- if ((width <= 0) || (height <= 0)) {
- Tk_UnmaintainGeometry(slavePtr->tkwin, masterPtr->tkwin);
- Tk_UnmapWindow(slavePtr->tkwin);
- } else {
- Tk_MaintainGeometry(slavePtr->tkwin, masterPtr->tkwin,
- x, y, width, height);
- }
- }
- /*
- * Changes to the window's structure could cause almost anything
- * to happen, including deleting the parent or child. If this
- * happens, we'll be told to abort.
- */
- if (abort) {
- goto done;
- }
- }
- done:
- masterPtr->abortPtr = NULL;
- Tcl_Release((ClientData) masterPtr);
- }
- /*
- *----------------------------------------------------------------------
- *
- * XExpansion --
- *
- * Given a list of packed slaves, the first of which is packed
- * on the left or right and is expandable, compute how much to
- * expand the child.
- *
- * Results:
- * The return value is the number of additional pixels to give to
- * the child.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static int
- XExpansion(slavePtr, cavityWidth)
- register Packer *slavePtr; /* First in list of remaining
- * slaves. */
- int cavityWidth; /* Horizontal space left for all
- * remaining slaves. */
- {
- int numExpand, minExpand, curExpand;
- int childWidth;
- /*
- * This procedure is tricky because windows packed top or bottom can
- * be interspersed among expandable windows packed left or right.
- * Scan through the list, keeping a running sum of the widths of
- * all left and right windows (actually, count the cavity space not
- * allocated) and a running count of all expandable left and right
- * windows. At each top or bottom window, and at the end of the
- * list, compute the expansion factor that seems reasonable at that
- * point. Return the smallest factor seen at any of these points.
- */
- minExpand = cavityWidth;
- numExpand = 0;
- for ( ; slavePtr != NULL; slavePtr = slavePtr->nextPtr) {
- childWidth = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padX + slavePtr->iPadX;
- if ((slavePtr->side == TOP) || (slavePtr->side == BOTTOM)) {
- curExpand = (cavityWidth - childWidth)/numExpand;
- if (curExpand < minExpand) {
- minExpand = curExpand;
- }
- } else {
- cavityWidth -= childWidth;
- if (slavePtr->flags & EXPAND) {
- numExpand++;
- }
- }
- }
- curExpand = cavityWidth/numExpand;
- if (curExpand < minExpand) {
- minExpand = curExpand;
- }
- return (minExpand < 0) ? 0 : minExpand;
- }
- /*
- *----------------------------------------------------------------------
- *
- * YExpansion --
- *
- * Given a list of packed slaves, the first of which is packed
- * on the top or bottom and is expandable, compute how much to
- * expand the child.
- *
- * Results:
- * The return value is the number of additional pixels to give to
- * the child.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static int
- YExpansion(slavePtr, cavityHeight)
- register Packer *slavePtr; /* First in list of remaining
- * slaves. */
- int cavityHeight; /* Vertical space left for all
- * remaining slaves. */
- {
- int numExpand, minExpand, curExpand;
- int childHeight;
- /*
- * See comments for XExpansion.
- */
- minExpand = cavityHeight;
- numExpand = 0;
- for ( ; slavePtr != NULL; slavePtr = slavePtr->nextPtr) {
- childHeight = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw
- + slavePtr->padY + slavePtr->iPadY;
- if ((slavePtr->side == LEFT) || (slavePtr->side == RIGHT)) {
- curExpand = (cavityHeight - childHeight)/numExpand;
- if (curExpand < minExpand) {
- minExpand = curExpand;
- }
- } else {
- cavityHeight -= childHeight;
- if (slavePtr->flags & EXPAND) {
- numExpand++;
- }
- }
- }
- curExpand = cavityHeight/numExpand;
- if (curExpand < minExpand) {
- minExpand = curExpand;
- }
- return (minExpand < 0) ? 0 : minExpand;
- }
- /*
- *--------------------------------------------------------------
- *
- * GetPacker --
- *
- * This internal procedure is used to locate a Packer
- * structure for a given window, creating one if one
- * doesn't exist already.
- *
- * Results:
- * The return value is a pointer to the Packer structure
- * corresponding to tkwin.
- *
- * Side effects:
- * A new packer structure may be created. If so, then
- * a callback is set up to clean things up when the
- * window is deleted.
- *
- *--------------------------------------------------------------
- */
- static Packer *
- GetPacker(tkwin)
- Tk_Window tkwin; /* Token for window for which
- * packer structure is desired. */
- {
- register Packer *packPtr;
- Tcl_HashEntry *hPtr;
- int new;
- TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
- if (!dispPtr->packInit) {
- dispPtr->packInit = 1;
- Tcl_InitHashTable(&dispPtr->packerHashTable, TCL_ONE_WORD_KEYS);
- }
- /*
- * See if there's already packer for this window. If not,
- * then create a new one.
- */
- hPtr = Tcl_CreateHashEntry(&dispPtr->packerHashTable, (char *) tkwin,
- &new);
- if (!new) {
- return (Packer *) Tcl_GetHashValue(hPtr);
- }
- packPtr = (Packer *) ckalloc(sizeof(Packer));
- packPtr->tkwin = tkwin;
- packPtr->masterPtr = NULL;
- packPtr->nextPtr = NULL;
- packPtr->slavePtr = NULL;
- packPtr->side = TOP;
- packPtr->anchor = TK_ANCHOR_CENTER;
- packPtr->padX = packPtr->padY = 0;
- packPtr->padLeft = packPtr->padTop = 0;
- packPtr->iPadX = packPtr->iPadY = 0;
- packPtr->doubleBw = 2*Tk_Changes(tkwin)->border_width;
- packPtr->abortPtr = NULL;
- packPtr->flags = 0;
- Tcl_SetHashValue(hPtr, packPtr);
- Tk_CreateEventHandler(tkwin, StructureNotifyMask,
- PackStructureProc, (ClientData) packPtr);
- return packPtr;
- }
- /*
- *--------------------------------------------------------------
- *
- * PackAfter --
- *
- * This procedure does most of the real work of adding
- * one or more windows into the packing order for its parent.
- *
- * Results:
- * A standard Tcl return value.
- *
- * Side effects:
- * The geometry of the specified windows may change, both now and
- * again in the future.
- *
- *--------------------------------------------------------------
- */
- static int
- PackAfter(interp, prevPtr, masterPtr, objc, objv)
- Tcl_Interp *interp; /* Interpreter for error reporting. */
- Packer *prevPtr; /* Pack windows in argv just after this
- * window; NULL means pack as first
- * child of masterPtr. */
- Packer *masterPtr; /* Master in which to pack windows. */
- int objc; /* Number of elements in objv. */
- Tcl_Obj *CONST objv[]; /* Array of lists, each containing 2
- * elements: window name and side
- * against which to pack. */
- {
- register Packer *packPtr;
- Tk_Window tkwin, ancestor, parent;
- int length;
- Tcl_Obj **options;
- int index, optionCount, c;
- /*
- * Iterate over all of the window specifiers, each consisting of
- * two arguments. The first argument contains the window name and
- * the additional arguments contain options such as "top" or
- * "padx 20".
- */
- for ( ; objc > 0; objc -= 2, objv += 2, prevPtr = packPtr) {
- if (objc < 2) {
- Tcl_AppendResult(interp, "wrong # args: window "",
- Tcl_GetString(objv[0]), "" should be followed by options",
- (char *) NULL);
- return TCL_ERROR;
- }
- /*
- * Find the packer for the window to be packed, and make sure
- * that the window in which it will be packed is either its
- * or a descendant of its parent.
- */
- if (TkGetWindowFromObj(interp, masterPtr->tkwin, objv[0], &tkwin)
- != TCL_OK) {
- return TCL_ERROR;
- }
- parent = Tk_Parent(tkwin);
- for (ancestor = masterPtr->tkwin; ; ancestor = Tk_Parent(ancestor)) {
- if (ancestor == parent) {
- break;
- }
- if (((Tk_FakeWin *) (ancestor))->flags & TK_TOP_HIERARCHY) {
- badWindow:
- Tcl_AppendResult(interp, "can't pack ", Tcl_GetString(objv[0]),
- " inside ", Tk_PathName(masterPtr->tkwin),
- (char *) NULL);
- return TCL_ERROR;
- }
- }
- if (((Tk_FakeWin *) (tkwin))->flags & TK_TOP_HIERARCHY) {
- goto badWindow;
- }
- if (tkwin == masterPtr->tkwin) {
- goto badWindow;
- }
- packPtr = GetPacker(tkwin);
- /*
- * Process options for this window.
- */
- if (Tcl_ListObjGetElements(interp, objv[1], &optionCount, &options)
- != TCL_OK) {
- return TCL_ERROR;
- }
- packPtr->side = TOP;
- packPtr->anchor = TK_ANCHOR_CENTER;
- packPtr->padX = packPtr->padY = 0;
- packPtr->padLeft = packPtr->padTop = 0;
- packPtr->iPadX = packPtr->iPadY = 0;
- packPtr->flags &= ~(FILLX|FILLY|EXPAND);
- packPtr->flags |= OLD_STYLE;
- for (index = 0 ; index < optionCount; index++) {
- Tcl_Obj *curOptPtr = options[index];
- char *curOpt = Tcl_GetStringFromObj(curOptPtr, &length);
- c = curOpt[0];
- if ((c == 't')
- && (strncmp(curOpt, "top", (unsigned) length)) == 0) {
- packPtr->side = TOP;
- } else if ((c == 'b')
- && (strncmp(curOpt, "bottom", (unsigned) length)) == 0) {
- packPtr->side = BOTTOM;
- } else if ((c == 'l')
- && (strncmp(curOpt, "left", (unsigned) length)) == 0) {
- packPtr->side = LEFT;
- } else if ((c == 'r')
- && (strncmp(curOpt, "right", (unsigned) length)) == 0) {
- packPtr->side = RIGHT;
- } else if ((c == 'e')
- && (strncmp(curOpt, "expand", (unsigned) length)) == 0) {
- packPtr->flags |= EXPAND;
- } else if ((c == 'f')
- && (strcmp(curOpt, "fill")) == 0) {
- packPtr->flags |= FILLX|FILLY;
- } else if ((length == 5) && (strcmp(curOpt, "fillx")) == 0) {
- packPtr->flags |= FILLX;
- } else if ((length == 5) && (strcmp(curOpt, "filly")) == 0) {
- packPtr->flags |= FILLY;
- } else if ((c == 'p') && (strcmp(curOpt, "padx")) == 0) {
- if (optionCount < (index+2)) {
- missingPad:
- Tcl_AppendResult(interp, "wrong # args: "", curOpt,
- "" option must be followed by screen distance",
- (char *) NULL);
- return TCL_ERROR;
- }
- if (TkParsePadAmount(interp, tkwin, options[index+1],
- &packPtr->padLeft, &packPtr->padX) != TCL_OK) {
- return TCL_ERROR;
- }
- packPtr->padX /= 2;
- packPtr->padLeft /= 2;
- packPtr->iPadX = 0;
- index++;
- } else if ((c == 'p') && (strcmp(curOpt, "pady")) == 0) {
- if (optionCount < (index+2)) {
- goto missingPad;
- }
- if (TkParsePadAmount(interp, tkwin, options[index+1],
- &packPtr->padTop, &packPtr->padY) != TCL_OK) {
- return TCL_ERROR;
- }
- packPtr->padY /= 2;
- packPtr->padTop /= 2;
- packPtr->iPadY = 0;
- index++;
- } else if ((c == 'f') && (length > 1)
- && (strncmp(curOpt, "frame", (unsigned) length) == 0)) {
- if (optionCount < (index+2)) {
- Tcl_AppendResult(interp, "wrong # args: "frame" ",
- "option must be followed by anchor point",
- (char *) NULL);
- return TCL_ERROR;
- }
- if (Tk_GetAnchorFromObj(interp, options[index+1],
- &packPtr->anchor) != TCL_OK) {
- return TCL_ERROR;
- }
- index++;
- } else {
- Tcl_AppendResult(interp, "bad option "", curOpt,
- "": should be top, bottom, left, right, ",
- "expand, fill, fillx, filly, padx, pady, or frame",
- (char *) NULL);
- return TCL_ERROR;
- }
- }
- if (packPtr != prevPtr) {
- /*
- * Unpack this window if it's currently packed.
- */
- if (packPtr->masterPtr != NULL) {
- if ((packPtr->masterPtr != masterPtr) &&
- (packPtr->masterPtr->tkwin
- != Tk_Parent(packPtr->tkwin))) {
- Tk_UnmaintainGeometry(packPtr->tkwin,
- packPtr->masterPtr->tkwin);
- }
- Unlink(packPtr);
- }
-
- /*
- * Add the window in the correct place in its parent's
- * packing order, then make sure that the window is
- * managed by us.
- */
- packPtr->masterPtr = masterPtr;
- if (prevPtr == NULL) {
- packPtr->nextPtr = masterPtr->slavePtr;
- masterPtr->slavePtr = packPtr;
- } else {
- packPtr->nextPtr = prevPtr->nextPtr;
- prevPtr->nextPtr = packPtr;
- }
- Tk_ManageGeometry(tkwin, &packerType, (ClientData) packPtr);
- }
- }
- /*
- * Arrange for the parent to be re-packed at the first
- * idle moment.
- */
- if (masterPtr->abortPtr != NULL) {
- *masterPtr->abortPtr = 1;
- }
- if (!(masterPtr->flags & REQUESTED_REPACK)) {
- masterPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) masterPtr);
- }
- return TCL_OK;
- }
- /*
- *----------------------------------------------------------------------
- *
- * Unlink --
- *
- * Remove a packer from its parent's list of slaves.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The parent will be scheduled for repacking.
- *
- *----------------------------------------------------------------------
- */
- static void
- Unlink(packPtr)
- register Packer *packPtr; /* Window to unlink. */
- {
- register Packer *masterPtr, *packPtr2;
- masterPtr = packPtr->masterPtr;
- if (masterPtr == NULL) {
- return;
- }
- if (masterPtr->slavePtr == packPtr) {
- masterPtr->slavePtr = packPtr->nextPtr;
- } else {
- for (packPtr2 = masterPtr->slavePtr; ; packPtr2 = packPtr2->nextPtr) {
- if (packPtr2 == NULL) {
- panic("Unlink couldn't find previous window");
- }
- if (packPtr2->nextPtr == packPtr) {
- packPtr2->nextPtr = packPtr->nextPtr;
- break;
- }
- }
- }
- if (!(masterPtr->flags & REQUESTED_REPACK)) {
- masterPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) masterPtr);
- }
- if (masterPtr->abortPtr != NULL) {
- *masterPtr->abortPtr = 1;
- }
- packPtr->masterPtr = NULL;
- }
- /*
- *----------------------------------------------------------------------
- *
- * DestroyPacker --
- *
- * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
- * to clean up the internal structure of a packer at a safe time
- * (when no-one is using it anymore).
- *
- * Results:
- * None.
- *
- * Side effects:
- * Everything associated with the packer is freed up.
- *
- *----------------------------------------------------------------------
- */
- static void
- DestroyPacker(memPtr)
- char *memPtr; /* Info about packed window that
- * is now dead. */
- {
- register Packer *packPtr = (Packer *) memPtr;
- ckfree((char *) packPtr);
- }
- /*
- *----------------------------------------------------------------------
- *
- * PackStructureProc --
- *
- * This procedure is invoked by the Tk event dispatcher in response
- * to StructureNotify events.
- *
- * Results:
- * None.
- *
- * Side effects:
- * If a window was just deleted, clean up all its packer-related
- * information. If it was just resized, repack its slaves, if
- * any.
- *
- *----------------------------------------------------------------------
- */
- static void
- PackStructureProc(clientData, eventPtr)
- ClientData clientData; /* Our information about window
- * referred to by eventPtr. */
- XEvent *eventPtr; /* Describes what just happened. */
- {
- register Packer *packPtr = (Packer *) clientData;
- if (eventPtr->type == ConfigureNotify) {
- if ((packPtr->slavePtr != NULL)
- && !(packPtr->flags & REQUESTED_REPACK)) {
- packPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) packPtr);
- }
- if (packPtr->doubleBw != 2*Tk_Changes(packPtr->tkwin)->border_width) {
- if ((packPtr->masterPtr != NULL)
- && !(packPtr->masterPtr->flags & REQUESTED_REPACK)) {
- packPtr->doubleBw = 2*Tk_Changes(packPtr->tkwin)->border_width;
- packPtr->masterPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) packPtr->masterPtr);
- }
- }
- } else if (eventPtr->type == DestroyNotify) {
- register Packer *slavePtr, *nextPtr;
- if (packPtr->masterPtr != NULL) {
- Unlink(packPtr);
- }
- for (slavePtr = packPtr->slavePtr; slavePtr != NULL;
- slavePtr = nextPtr) {
- Tk_ManageGeometry(slavePtr->tkwin, (Tk_GeomMgr *) NULL,
- (ClientData) NULL);
- Tk_UnmapWindow(slavePtr->tkwin);
- slavePtr->masterPtr = NULL;
- nextPtr = slavePtr->nextPtr;
- slavePtr->nextPtr = NULL;
- }
- if (packPtr->tkwin != NULL) {
- TkDisplay *dispPtr = ((TkWindow *) packPtr->tkwin)->dispPtr;
- Tcl_DeleteHashEntry(Tcl_FindHashEntry(&dispPtr->packerHashTable,
- (char *) packPtr->tkwin));
- }
- if (packPtr->flags & REQUESTED_REPACK) {
- Tcl_CancelIdleCall(ArrangePacking, (ClientData) packPtr);
- }
- packPtr->tkwin = NULL;
- Tcl_EventuallyFree((ClientData) packPtr, DestroyPacker);
- } else if (eventPtr->type == MapNotify) {
- /*
- * When a master gets mapped, must redo the geometry computation
- * so that all of its slaves get remapped.
- */
- if ((packPtr->slavePtr != NULL)
- && !(packPtr->flags & REQUESTED_REPACK)) {
- packPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) packPtr);
- }
- } else if (eventPtr->type == UnmapNotify) {
- register Packer *packPtr2;
- /*
- * Unmap all of the slaves when the master gets unmapped,
- * so that they don't bother to keep redisplaying
- * themselves.
- */
- for (packPtr2 = packPtr->slavePtr; packPtr2 != NULL;
- packPtr2 = packPtr2->nextPtr) {
- Tk_UnmapWindow(packPtr2->tkwin);
- }
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConfigureSlaves --
- *
- * This implements the guts of the "pack configure" command. Given
- * a list of slaves and configuration options, it arranges for the
- * packer to manage the slaves and sets the specified options.
- *
- * Results:
- * TCL_OK is returned if all went well. Otherwise, TCL_ERROR is
- * returned and the interp's result is set to contain an error message.
- *
- * Side effects:
- * Slave windows get taken over by the packer.
- *
- *----------------------------------------------------------------------
- */
- static int
- ConfigureSlaves(interp, tkwin, objc, objv)
- Tcl_Interp *interp; /* Interpreter for error reporting. */
- Tk_Window tkwin; /* Any window in application containing
- * slaves. Used to look up slave names. */
- int objc; /* Number of elements in argv. */
- Tcl_Obj *CONST objv[]; /* Argument objects: contains one or more
- * window names followed by any number
- * of "option value" pairs. Caller must
- * make sure that there is at least one
- * window name. */
- {
- Packer *masterPtr, *slavePtr, *prevPtr, *otherPtr;
- Tk_Window other, slave, parent, ancestor;
- int i, j, numWindows, tmp, positionGiven;
- char *string;
- static CONST char *optionStrings[] = {
- "-after", "-anchor", "-before", "-expand", "-fill",
- "-in", "-ipadx", "-ipady", "-padx", "-pady", "-side", (char *) NULL };
- enum options {
- CONF_AFTER, CONF_ANCHOR, CONF_BEFORE, CONF_EXPAND, CONF_FILL,
- CONF_IN, CONF_IPADX, CONF_IPADY, CONF_PADX, CONF_PADY, CONF_SIDE };
- int index, side;
- /*
- * Find out how many windows are specified.
- */
- for (numWindows = 0; numWindows < objc; numWindows++) {
- string = Tcl_GetString(objv[numWindows]);
- if (string[0] != '.') {
- break;
- }
- }
- /*
- * Iterate over all of the slave windows, parsing the configuration
- * options for each slave. It's a bit wasteful to re-parse the
- * options for each slave, but things get too messy if we try to
- * parse the arguments just once at the beginning. For example,
- * if a slave already is packed we want to just change a few
- * existing values without resetting everything. If there are
- * multiple windows, the -after, -before, and -in options only
- * get processed for the first window.
- */
- masterPtr = NULL;
- prevPtr = NULL;
- positionGiven = 0;
- for (j = 0; j < numWindows; j++) {
- if (TkGetWindowFromObj(interp, tkwin, objv[j], &slave) != TCL_OK) {
- return TCL_ERROR;
- }
- if (Tk_TopWinHierarchy(slave)) {
- Tcl_AppendResult(interp, "can't pack "", Tcl_GetString(objv[j]),
- "": it's a top-level window", (char *) NULL);
- return TCL_ERROR;
- }
- slavePtr = GetPacker(slave);
- slavePtr->flags &= ~OLD_STYLE;
- /*
- * If the slave isn't currently packed, reset all of its
- * configuration information to default values (there could
- * be old values left from a previous packing).
- */
- if (slavePtr->masterPtr == NULL) {
- slavePtr->side = TOP;
- slavePtr->anchor = TK_ANCHOR_CENTER;
- slavePtr->padX = slavePtr->padY = 0;
- slavePtr->padLeft = slavePtr->padTop = 0;
- slavePtr->iPadX = slavePtr->iPadY = 0;
- slavePtr->flags &= ~(FILLX|FILLY|EXPAND);
- }
- for (i = numWindows; i < objc; i+=2) {
- if ((i+2) > objc) {
- Tcl_AppendResult(interp, "extra option "",
- Tcl_GetString(objv[i]),
- "" (option with no value?)", (char *) NULL);
- return TCL_ERROR;
- }
- if (Tcl_GetIndexFromObj(interp, objv[i], optionStrings, "option",
- 0, &index) != TCL_OK) {
- return TCL_ERROR;
- }
- if (index == CONF_AFTER) {
- if (j == 0) {
- if (TkGetWindowFromObj(interp, tkwin, objv[i+1], &other)
- != TCL_OK) {
- return TCL_ERROR;
- }
- prevPtr = GetPacker(other);
- if (prevPtr->masterPtr == NULL) {
- notPacked:
- Tcl_AppendResult(interp, "window "",
- Tcl_GetString(objv[i+1]),
- "" isn't packed", (char *) NULL);
- return TCL_ERROR;
- }
- masterPtr = prevPtr->masterPtr;
- positionGiven = 1;
- }
- } else if (index == CONF_ANCHOR) {
- if (Tk_GetAnchorFromObj(interp, objv[i+1], &slavePtr->anchor)
- != TCL_OK) {
- return TCL_ERROR;
- }
- } else if (index == CONF_BEFORE) {
- if (j == 0) {
- if (TkGetWindowFromObj(interp, tkwin, objv[i+1], &other)
- != TCL_OK) {
- return TCL_ERROR;
- }
- otherPtr = GetPacker(other);
- if (otherPtr->masterPtr == NULL) {
- goto notPacked;
- }
- masterPtr = otherPtr->masterPtr;
- prevPtr = masterPtr->slavePtr;
- if (prevPtr == otherPtr) {
- prevPtr = NULL;
- } else {
- while (prevPtr->nextPtr != otherPtr) {
- prevPtr = prevPtr->nextPtr;
- }
- }
- positionGiven = 1;
- }
- } else if (index == CONF_EXPAND) {
- if (Tcl_GetBooleanFromObj(interp, objv[i+1], &tmp) != TCL_OK) {
- return TCL_ERROR;
- }
- slavePtr->flags &= ~EXPAND;
- if (tmp) {
- slavePtr->flags |= EXPAND;
- }
- } else if (index == CONF_FILL) {
- string = Tcl_GetString(objv[i+1]);
- if (strcmp(string, "none") == 0) {
- slavePtr->flags &= ~(FILLX|FILLY);
- } else if (strcmp(string, "x") == 0) {
- slavePtr->flags = (slavePtr->flags & ~FILLY) | FILLX;
- } else if (strcmp(string, "y") == 0) {
- slavePtr->flags = (slavePtr->flags & ~FILLX) | FILLY;
- } else if (strcmp(string, "both") == 0) {
- slavePtr->flags |= FILLX|FILLY;
- } else {
- Tcl_AppendResult(interp, "bad fill style "", string,
- "": must be none, x, y, or both", (char *) NULL);
- return TCL_ERROR;
- }
- } else if (index == CONF_IN) {
- if (j == 0) {
- if (TkGetWindowFromObj(interp, tkwin, objv[i+1], &other)
- != TCL_OK) {
- return TCL_ERROR;
- }
- masterPtr = GetPacker(other);
- prevPtr = masterPtr->slavePtr;
- if (prevPtr != NULL) {
- while (prevPtr->nextPtr != NULL) {
- prevPtr = prevPtr->nextPtr;
- }
- }
- positionGiven = 1;
- }
- } else if (index == CONF_IPADX) {
- if ((Tk_GetPixelsFromObj(interp, slave, objv[i+1], &tmp)
- != TCL_OK)
- || (tmp < 0)) {
- Tcl_ResetResult(interp);
- Tcl_AppendResult(interp, "bad ipadx value "",
- Tcl_GetString(objv[i+1]),
- "": must be positive screen distance",
- (char *) NULL);
- return TCL_ERROR;
- }
- slavePtr->iPadX = tmp * 2;
- } else if (index == CONF_IPADY) {
- if ((Tk_GetPixelsFromObj(interp, slave, objv[i+1], &tmp)
- != TCL_OK)
- || (tmp < 0)) {
- Tcl_ResetResult(interp);
- Tcl_AppendResult(interp, "bad ipady value "",
- Tcl_GetString(objv[i+1]),
- "": must be positive screen distance",
- (char *) NULL);
- return TCL_ERROR;
- }
- slavePtr->iPadY = tmp * 2;
- } else if (index == CONF_PADX) {
- if (TkParsePadAmount(interp, slave, objv[i+1],
- &slavePtr->padLeft, &slavePtr->padX) != TCL_OK) {
- return TCL_ERROR;
- }
- } else if (index == CONF_PADY) {
- if (TkParsePadAmount(interp, slave, objv[i+1],
- &slavePtr->padTop, &slavePtr->padY) != TCL_OK) {
- return TCL_ERROR;
- }
- } else if (index == CONF_SIDE) {
- if (Tcl_GetIndexFromObj(interp, objv[i+1], sideNames, "side",
- TCL_EXACT, &side) != TCL_OK) {
- return TCL_ERROR;
- }
- slavePtr->side = (Side) side;
- }
- }
- /*
- * If no position in a packing list was specified and the slave
- * is already packed, then leave it in its current location in
- * its current packing list.
- */
- if (!positionGiven && (slavePtr->masterPtr != NULL)) {
- masterPtr = slavePtr->masterPtr;
- goto scheduleLayout;
- }
- /*
- * If the slave is going to be put back after itself then
- * skip the whole operation, since it won't work anyway.
- */
- if (prevPtr == slavePtr) {
- masterPtr = slavePtr->masterPtr;
- goto scheduleLayout;
- }
-
- /*
- * If none of the "-in", "-before", or "-after" options has
- * been specified, arrange for the slave to go at the end of
- * the order for its parent.
- */
-
- if (!positionGiven) {
- masterPtr = GetPacker(Tk_Parent(slave));
- prevPtr = masterPtr->slavePtr;
- if (prevPtr != NULL) {
- while (prevPtr->nextPtr != NULL) {
- prevPtr = prevPtr->nextPtr;
- }
- }
- }
- /*
- * Make sure that the slave's parent is either the master or
- * an ancestor of the master, and that the master and slave
- * aren't the same.
- */
-
- parent = Tk_Parent(slave);
- for (ancestor = masterPtr->tkwin; ; ancestor = Tk_Parent(ancestor)) {
- if (ancestor == parent) {
- break;
- }
- if (Tk_TopWinHierarchy(ancestor)) {
- Tcl_AppendResult(interp, "can't pack ", Tcl_GetString(objv[j]),
- " inside ", Tk_PathName(masterPtr->tkwin),
- (char *) NULL);
- return TCL_ERROR;
- }
- }
- if (slave == masterPtr->tkwin) {
- Tcl_AppendResult(interp, "can't pack ", Tcl_GetString(objv[j]),
- " inside itself", (char *) NULL);
- return TCL_ERROR;
- }
- /*
- * Unpack the slave if it's currently packed, then position it
- * after prevPtr.
- */
- if (slavePtr->masterPtr != NULL) {
- if ((slavePtr->masterPtr != masterPtr) &&
- (slavePtr->masterPtr->tkwin
- != Tk_Parent(slavePtr->tkwin))) {
- Tk_UnmaintainGeometry(slavePtr->tkwin,
- slavePtr->masterPtr->tkwin);
- }
- Unlink(slavePtr);
- }
- slavePtr->masterPtr = masterPtr;
- if (prevPtr == NULL) {
- slavePtr->nextPtr = masterPtr->slavePtr;
- masterPtr->slavePtr = slavePtr;
- } else {
- slavePtr->nextPtr = prevPtr->nextPtr;
- prevPtr->nextPtr = slavePtr;
- }
- Tk_ManageGeometry(slave, &packerType, (ClientData) slavePtr);
- prevPtr = slavePtr;
- /*
- * Arrange for the parent to be re-packed at the first
- * idle moment.
- */
- scheduleLayout:
- if (masterPtr->abortPtr != NULL) {
- *masterPtr->abortPtr = 1;
- }
- if (!(masterPtr->flags & REQUESTED_REPACK)) {
- masterPtr->flags |= REQUESTED_REPACK;
- Tcl_DoWhenIdle(ArrangePacking, (ClientData) masterPtr);
- }
- }
- return TCL_OK;
- }