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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.
*/
#include "tkInt.h"
typedef enum {TOP, BOTTOM, LEFT, RIGHT} Side;
static const char *const sideNames[] = {
"top", "bottom", "left", "right", 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 master. 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 master 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 master. */
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 master 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.
* ALLOCED_MASTER 1 means that Pack has allocated itself as
* geometry master for this window.
*/
#define REQUESTED_REPACK 1
#define FILLX 2
#define FILLY 4
#define EXPAND 8
#define OLD_STYLE 16
#define DONT_PROPAGATE 32
#define ALLOCED_MASTER 64
/*
* The following structure is the official type record for the packer:
*/
static void PackReqProc(ClientData clientData, Tk_Window tkwin);
static void PackLostSlaveProc(ClientData clientData,
Tk_Window tkwin);
static const Tk_GeomMgr packerType = {
"pack", /* name */
PackReqProc, /* requestProc */
PackLostSlaveProc, /* lostSlaveProc */
};
/*
* Forward declarations for functions defined later in this file:
*/
static void ArrangePacking(ClientData clientData);
static int ConfigureSlaves(Tcl_Interp *interp, Tk_Window tkwin,
int objc, Tcl_Obj *const objv[]);
static void DestroyPacker(char *memPtr);
static Packer * GetPacker(Tk_Window tkwin);
static int PackAfter(Tcl_Interp *interp, Packer *prevPtr,
Packer *masterPtr, int objc,Tcl_Obj *const objv[]);
static void PackStructureProc(ClientData clientData,
XEvent *eventPtr);
static void Unlink(Packer *packPtr);
static int XExpansion(Packer *slavePtr, int cavityWidth);
static int YExpansion(Packer *slavePtr, int cavityHeight);
/*
*------------------------------------------------------------------------
*
* TkAppendPadAmount --
*
* This function generates a text value that describes one of the -padx,
* -pady, -ipadx, or -ipady configuration options. The text value
* generated is appended to the given Tcl_Obj.
*
* Results:
* None.
*
* Side effects:
* None.
*
*------------------------------------------------------------------------
*/
void
TkAppendPadAmount(
Tcl_Obj *bufferObj, /* The interpreter into which the result is
* written. */
const char *switchName, /* One of "padx", "pady", "ipadx" or
* "ipady" */
int halfSpace, /* The left or top padding amount */
int allSpace) /* The total amount of padding */
{
Tcl_Obj *padding[2];
if (halfSpace*2 == allSpace) {
Tcl_DictObjPut(NULL, bufferObj, Tcl_NewStringObj(switchName, -1),
Tcl_NewIntObj(halfSpace));
} else {
padding[0] = Tcl_NewIntObj(halfSpace);
padding[1] = Tcl_NewIntObj(allSpace - halfSpace);
Tcl_DictObjPut(NULL, bufferObj, Tcl_NewStringObj(switchName, -1),
Tcl_NewListObj(2, padding));
}
}
/*
*------------------------------------------------------------------------
*
* Tk_PackCmd --
*
* This function 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 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 = clientData;
const char *argv2;
static const char *const optionStrings[] = {
/* after, append, before and unpack are deprecated */
"after", "append", "before", "unpack",
"configure", "forget", "info", "propagate", "slaves", 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) {
const 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]);
switch ((enum options) index) {
case 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_SetObjResult(interp, Tcl_ObjPrintf(
"window \"%s\" isn't packed", argv2));
Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED", NULL);
return TCL_ERROR;
}
return PackAfter(interp, prevPtr, prevPtr->masterPtr, objc-3, objv+3);
}
case 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);
}
case 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_SetObjResult(interp, Tcl_ObjPrintf(
"window \"%s\" isn't packed", argv2));
Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED", NULL);
return TCL_ERROR;
}
masterPtr = packPtr->masterPtr;
prevPtr = masterPtr->slavePtr;
if (prevPtr == packPtr) {
prevPtr = NULL;
} else {
for ( ; ; prevPtr = prevPtr->nextPtr) {
if (prevPtr == NULL) {
Tcl_Panic("\"pack before\" couldn't find predecessor");
}
if (prevPtr->nextPtr == packPtr) {
break;
}
}
}
return PackAfter(interp, prevPtr, masterPtr, objc-3, objv+3);
}
case PACK_CONFIGURE:
if (argv2[0] != '.') {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad argument \"%s\": must be name of window", argv2));
Tcl_SetErrorCode(interp, "TK", "VALUE", "WINDOW_PATH", NULL);
return TCL_ERROR;
}
return ConfigureSlaves(interp, tkwin, objc-2, objv+2);
case 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, NULL, NULL);
if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) {
Tk_UnmaintainGeometry(slavePtr->tkwin,
slavePtr->masterPtr->tkwin);
}
Unlink(slavePtr);
Tk_UnmapWindow(slavePtr->tkwin);
}
}
break;
}
case PACK_INFO: {
register Packer *slavePtr;
Tk_Window slave;
Tcl_Obj *infoObj;
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_SetObjResult(interp, Tcl_ObjPrintf(
"window \"%s\" isn't packed", argv2));
Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED", NULL);
return TCL_ERROR;
}
infoObj = Tcl_NewObj();
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-in", -1),
TkNewWindowObj(slavePtr->masterPtr->tkwin));
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-anchor", -1),
Tcl_NewStringObj(Tk_NameOfAnchor(slavePtr->anchor), -1));
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-expand", -1),
Tcl_NewBooleanObj(slavePtr->flags & EXPAND));
switch (slavePtr->flags & (FILLX|FILLY)) {
case 0:
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1),
Tcl_NewStringObj("none", -1));
break;
case FILLX:
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1),
Tcl_NewStringObj("x", -1));
break;
case FILLY:
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1),
Tcl_NewStringObj("y", -1));
break;
case FILLX|FILLY:
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1),
Tcl_NewStringObj("both", -1));
break;
}
TkAppendPadAmount(infoObj, "-ipadx", slavePtr->iPadX/2, slavePtr->iPadX);
TkAppendPadAmount(infoObj, "-ipady", slavePtr->iPadY/2, slavePtr->iPadY);
TkAppendPadAmount(infoObj, "-padx", slavePtr->padLeft,slavePtr->padX);
TkAppendPadAmount(infoObj, "-pady", slavePtr->padTop, slavePtr->padY);
Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-side", -1),
Tcl_NewStringObj(sideNames[slavePtr->side], -1));
Tcl_SetObjResult(interp, infoObj);
break;
}
case 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) {
/*
* If we have slaves, we need to register as geometry master.
*/
if (masterPtr->slavePtr != NULL) {
if (TkSetGeometryMaster(interp, master, "pack") != TCL_OK) {
return TCL_ERROR;
}
masterPtr->flags |= ALLOCED_MASTER;
}
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, masterPtr);
}
} else {
if (masterPtr->flags & ALLOCED_MASTER) {
TkFreeGeometryMaster(master, "pack");
masterPtr->flags &= ~ALLOCED_MASTER;
}
masterPtr->flags |= DONT_PROPAGATE;
}
break;
}
case PACK_SLAVES: {
Tk_Window master;
Packer *masterPtr, *slavePtr;
Tcl_Obj *resultObj;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "window");
return TCL_ERROR;
}
if (TkGetWindowFromObj(interp, tkwin, objv[2], &master) != TCL_OK) {
return TCL_ERROR;
}
resultObj = Tcl_NewObj();
masterPtr = GetPacker(master);
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
Tcl_ListObjAppendElement(NULL, resultObj,
TkNewWindowObj(slavePtr->tkwin));
}
Tcl_SetObjResult(interp, resultObj);
break;
}
case 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, NULL, NULL);
if (packPtr->masterPtr->tkwin != Tk_Parent(packPtr->tkwin)) {
Tk_UnmaintainGeometry(packPtr->tkwin,
packPtr->masterPtr->tkwin);
}
Unlink(packPtr);
Tk_UnmapWindow(packPtr->tkwin);
}
break;
}
}
return TCL_OK;
}
/*
*------------------------------------------------------------------------
*
* PackReqProc --
*
* This function 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 clientData, /* Packer's information about window that got
* new preferred geometry. */
Tk_Window tkwin) /* Other Tk-related information about the
* window. */
{
register Packer *packPtr = clientData;
packPtr = packPtr->masterPtr;
if (!(packPtr->flags & REQUESTED_REPACK)) {
packPtr->flags |= REQUESTED_REPACK;
Tcl_DoWhenIdle(ArrangePacking, packPtr);
}
}
/*
*------------------------------------------------------------------------
*
* PackLostSlaveProc --
*
* This function 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 clientData, /* Packer structure for slave window that was
* stolen away. */
Tk_Window tkwin) /* Tk's handle for the slave window. */
{
register Packer *slavePtr = clientData;
if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) {
Tk_UnmaintainGeometry(slavePtr->tkwin, slavePtr->masterPtr->tkwin);
}
Unlink(slavePtr);
Tk_UnmapWindow(slavePtr->tkwin);
}
/*
*------------------------------------------------------------------------
*
* ArrangePacking --
*
* This function 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) /* Structure describing master whose slaves
* are to be re-layed out. */
{
register Packer *masterPtr = 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 master 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 master has no slaves anymore, then don't do anything at all:
* just leave the master'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(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 master 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
* master 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, 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:
Tcl_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(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(
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 function 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)) {
if (numExpand) {
curExpand = (cavityWidth - childWidth)/numExpand;
if (curExpand < minExpand) {
minExpand = curExpand;
}
}
} else {
cavityWidth -= childWidth;
if (slavePtr->flags & EXPAND) {
numExpand++;
}
}
}
if (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(
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)) {
if (numExpand) {
curExpand = (cavityHeight - childHeight)/numExpand;
if (curExpand < minExpand) {
minExpand = curExpand;
}
}
} else {
cavityHeight -= childHeight;
if (slavePtr->flags & EXPAND) {
numExpand++;
}
}
}
if (numExpand) {
curExpand = cavityHeight/numExpand;
if (curExpand < minExpand) {
minExpand = curExpand;
}
}
return (minExpand < 0) ? 0 : minExpand;
}
/*
*------------------------------------------------------------------------
*
* GetPacker --
*
* This internal function 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(
Tk_Window tkwin) /* Token for window for which packer structure
* is desired. */
{
register Packer *packPtr;
Tcl_HashEntry *hPtr;
int isNew;
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,
&isNew);
if (!isNew) {
return Tcl_GetHashValue(hPtr);
}
packPtr = 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, packPtr);
return packPtr;
}
/*
*------------------------------------------------------------------------
*
* PackAfter --
*
* This function does most of the real work of adding one or more windows
* into the packing order for its master.
*
* 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(
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_SetObjResult(interp, Tcl_ObjPrintf(
"wrong # args: window \"%s\" should be followed by options",
Tcl_GetString(objv[0])));
Tcl_SetErrorCode(interp, "TCL", "WRONGARGS", 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_SetObjResult(interp, Tcl_ObjPrintf(
"can't pack %s inside %s", Tcl_GetString(objv[0]),
Tk_PathName(masterPtr->tkwin)));
Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "HIERARCHY", 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];
const char *curOpt = Tcl_GetStringFromObj(curOptPtr, &length);
c = curOpt[0];
if ((c == 't')
&& (strncmp(curOpt, "top", (size_t) length)) == 0) {
packPtr->side = TOP;
} else if ((c == 'b')
&& (strncmp(curOpt, "bottom", (size_t) length)) == 0) {
packPtr->side = BOTTOM;
} else if ((c == 'l')
&& (strncmp(curOpt, "left", (size_t) length)) == 0) {
packPtr->side = LEFT;
} else if ((c == 'r')
&& (strncmp(curOpt, "right", (size_t) length)) == 0) {
packPtr->side = RIGHT;
} else if ((c == 'e')
&& (strncmp(curOpt, "expand", (size_t) 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_SetObjResult(interp, Tcl_ObjPrintf(
"wrong # args: \"%s\" option must be"
" followed by screen distance", curOpt));
Tcl_SetErrorCode(interp, "TK", "OLDPACK", "BAD_PARAMETER",
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", (size_t) length) == 0)) {
if (optionCount < (index+2)) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"wrong # args: \"frame\""
" option must be followed by anchor point", -1));
Tcl_SetErrorCode(interp, "TK", "OLDPACK", "BAD_PARAMETER",
NULL);
return TCL_ERROR;
}
if (Tk_GetAnchorFromObj(interp, options[index+1],
&packPtr->anchor) != TCL_OK) {
return TCL_ERROR;
}
index++;
} else {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad option \"%s\": should be top, bottom, left,"
" right, expand, fill, fillx, filly, padx, pady, or"
" frame", curOpt));
Tcl_SetErrorCode(interp, "TK", "OLDPACK", "BAD_PARAMETER",
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 master'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, packPtr);
if (!(masterPtr->flags & DONT_PROPAGATE)) {
if (TkSetGeometryMaster(interp, masterPtr->tkwin, "pack")
!= TCL_OK) {
Tk_ManageGeometry(tkwin, NULL, NULL);
Unlink(packPtr);
return TCL_ERROR;
}
masterPtr->flags |= ALLOCED_MASTER;
}
}
}
/*
* Arrange for the master 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, masterPtr);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Unlink --
*
* Remove a packer from its master's list of slaves.
*
* Results:
* None.
*
* Side effects:
* The master will be scheduled for repacking.
*
*----------------------------------------------------------------------
*/
static void
Unlink(
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) {
Tcl_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, masterPtr);
}
if (masterPtr->abortPtr != NULL) {
*masterPtr->abortPtr = 1;
}
packPtr->masterPtr = NULL;
/*
* If we have emptied this master from slaves it means we are no longer
* handling it and should mark it as free.
*/
if (masterPtr->slavePtr == NULL && masterPtr->flags & ALLOCED_MASTER) {
TkFreeGeometryMaster(masterPtr->tkwin, "pack");
masterPtr->flags &= ~ALLOCED_MASTER;
}
}
/*
*----------------------------------------------------------------------
*
* DestroyPacker --
*
* This function 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(
char *memPtr) /* Info about packed window that is now
* dead. */
{
register Packer *packPtr = (Packer *) memPtr;
ckfree(packPtr);
}
/*
*----------------------------------------------------------------------
*
* PackStructureProc --
*
* This function 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 clientData, /* Our information about window referred to by
* eventPtr. */
XEvent *eventPtr) /* Describes what just happened. */
{
register Packer *packPtr = clientData;
if (eventPtr->type == ConfigureNotify) {
if ((packPtr->slavePtr != NULL)
&& !(packPtr->flags & REQUESTED_REPACK)) {
packPtr->flags |= REQUESTED_REPACK;
Tcl_DoWhenIdle(ArrangePacking, packPtr);
}
if ((packPtr->masterPtr != NULL)
&& (packPtr->doubleBw != 2*Tk_Changes(packPtr->tkwin)->border_width)) {
if (!(packPtr->masterPtr->flags & REQUESTED_REPACK)) {
packPtr->doubleBw = 2*Tk_Changes(packPtr->tkwin)->border_width;
packPtr->masterPtr->flags |= REQUESTED_REPACK;
Tcl_DoWhenIdle(ArrangePacking, 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, NULL, 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, packPtr);
}
packPtr->tkwin = NULL;
Tcl_EventuallyFree(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, 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(
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;
const char *string;
static const char *const optionStrings[] = {
"-after", "-anchor", "-before", "-expand", "-fill",
"-in", "-ipadx", "-ipady", "-padx", "-pady", "-side", 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_SetObjResult(interp, Tcl_ObjPrintf(
"can't pack \"%s\": it's a top-level window",
Tcl_GetString(objv[j])));
Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "TOPLEVEL", 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_SetObjResult(interp, Tcl_ObjPrintf(
"extra option \"%s\" (option with no value?)",
Tcl_GetString(objv[i])));
Tcl_SetErrorCode(interp, "TK", "PACK", "BAD_PARAMETER", NULL);
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[i], optionStrings, "option",
0, &index) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum options) index) {
case 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_SetObjResult(interp, Tcl_ObjPrintf(
"window \"%s\" isn't packed",
Tcl_GetString(objv[i+1])));
Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED",
NULL);
return TCL_ERROR;
}
masterPtr = prevPtr->masterPtr;
positionGiven = 1;
}
break;
case CONF_ANCHOR:
if (Tk_GetAnchorFromObj(interp, objv[i+1], &slavePtr->anchor)
!= TCL_OK) {
return TCL_ERROR;
}
break;
case 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;
}
break;
case CONF_EXPAND:
if (Tcl_GetBooleanFromObj(interp, objv[i+1], &tmp) != TCL_OK) {
return TCL_ERROR;
}
slavePtr->flags &= ~EXPAND;
if (tmp) {
slavePtr->flags |= EXPAND;
}
break;
case 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_SetObjResult(interp, Tcl_ObjPrintf(
"bad fill style \"%s\": must be "
"none, x, y, or both", string));
Tcl_SetErrorCode(interp, "TK", "VALUE", "FILL", NULL);
return TCL_ERROR;
}
break;
case 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;
}
break;
case CONF_IPADX:
if ((Tk_GetPixelsFromObj(interp, slave, objv[i+1], &tmp)
!= TCL_OK) || (tmp < 0)) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad ipadx value \"%s\": must be positive screen"
" distance", Tcl_GetString(objv[i+1])));
Tcl_SetErrorCode(interp, "TK", "VALUE", "INT_PAD", NULL);
return TCL_ERROR;
}
slavePtr->iPadX = tmp * 2;
break;
case CONF_IPADY:
if ((Tk_GetPixelsFromObj(interp, slave, objv[i+1], &tmp)
!= TCL_OK) || (tmp < 0)) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad ipady value \"%s\": must be positive screen"
" distance", Tcl_GetString(objv[i+1])));
Tcl_SetErrorCode(interp, "TK", "VALUE", "INT_PAD", NULL);
return TCL_ERROR;
}
slavePtr->iPadY = tmp * 2;
break;
case CONF_PADX:
if (TkParsePadAmount(interp, slave, objv[i+1],
&slavePtr->padLeft, &slavePtr->padX) != TCL_OK) {
return TCL_ERROR;
}
break;
case CONF_PADY:
if (TkParsePadAmount(interp, slave, objv[i+1],
&slavePtr->padTop, &slavePtr->padY) != TCL_OK) {
return TCL_ERROR;
}
break;
case CONF_SIDE:
if (Tcl_GetIndexFromObj(interp, objv[i+1], sideNames, "side",
TCL_EXACT, &side) != TCL_OK) {
return TCL_ERROR;
}
slavePtr->side = (Side) side;
break;
}
}
/*
* 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 or the same -in
* window is passed in again, then just 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_SetObjResult(interp, Tcl_ObjPrintf(
"can't pack %s inside %s", Tcl_GetString(objv[j]),
Tk_PathName(masterPtr->tkwin)));
Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "HIERARCHY", NULL);
return TCL_ERROR;
}
}
if (slave == masterPtr->tkwin) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"can't pack %s inside itself", Tcl_GetString(objv[j])));
Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "SELF", 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, slavePtr);
prevPtr = slavePtr;
if (!(masterPtr->flags & DONT_PROPAGATE)) {
if (TkSetGeometryMaster(interp, masterPtr->tkwin, "pack")
!= TCL_OK) {
Tk_ManageGeometry(slave, NULL, NULL);
Unlink(slavePtr);
return TCL_ERROR;
}
masterPtr->flags |= ALLOCED_MASTER;
}
/*
* Arrange for the master 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, masterPtr);
}
}
return TCL_OK;
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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