/
tkPack.c
1721 lines (1603 loc) · 49.5 KB
/
tkPack.c
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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 1.1.4.3 1998/12/13 08:16:10 lfb Exp $
*/
#include "tkPort.h"
#include "tkInt.h"
typedef enum {TOP, BOTTOM, LEFT, RIGHT} Side;
/* 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 (half of this space is left on each
* side). This is space *outside* the window:
* we'll allocate extra space in frame but
* won't enlarge window). */
int iPadX, iPadY; /* Total extra pixels to allocate inside the
* window (half 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 argc, char *argv[]));
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 argc,
char **argv));
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));
/*
*--------------------------------------------------------------
*
* 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_PackCmd(clientData, interp, argc, argv)
ClientData clientData; /* Main window associated with
* interpreter. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
Tk_Window tkwin = (Tk_Window) clientData;
size_t length;
int c;
if ((argc >= 2) && (argv[1][0] == '.')) {
return ConfigureSlaves(interp, tkwin, argc-1, argv+1);
}
if (argc < 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " option arg ?arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'a') && (length >= 2)
&& (strncmp(argv[1], "after", length) == 0)) {
Packer *prevPtr;
Tk_Window tkwin2;
tkwin2 = Tk_NameToWindow(interp, argv[2], tkwin);
if (tkwin2 == NULL) {
return TCL_ERROR;
}
prevPtr = GetPacker(tkwin2);
if (prevPtr->masterPtr == NULL) {
Tcl_AppendResult(interp, "window \"", argv[2],
"\" isn't packed", (char *) NULL);
return TCL_ERROR;
}
return PackAfter(interp, prevPtr, prevPtr->masterPtr, argc-3, argv+3);
} else if ((c == 'a') && (length >= 2)
&& (strncmp(argv[1], "append", length) == 0)) {
Packer *masterPtr;
register Packer *prevPtr;
Tk_Window tkwin2;
tkwin2 = Tk_NameToWindow(interp, argv[2], tkwin);
if (tkwin2 == NULL) {
return TCL_ERROR;
}
masterPtr = GetPacker(tkwin2);
prevPtr = masterPtr->slavePtr;
if (prevPtr != NULL) {
while (prevPtr->nextPtr != NULL) {
prevPtr = prevPtr->nextPtr;
}
}
return PackAfter(interp, prevPtr, masterPtr, argc-3, argv+3);
} else if ((c == 'b') && (strncmp(argv[1], "before", length) == 0)) {
Packer *packPtr, *masterPtr;
register Packer *prevPtr;
Tk_Window tkwin2;
tkwin2 = Tk_NameToWindow(interp, argv[2], tkwin);
if (tkwin2 == NULL) {
return TCL_ERROR;
}
packPtr = GetPacker(tkwin2);
if (packPtr->masterPtr == NULL) {
Tcl_AppendResult(interp, "window \"", argv[2],
"\" 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, argc-3, argv+3);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)) {
if (argv[2][0] != '.') {
Tcl_AppendResult(interp, "bad argument \"", argv[2],
"\": must be name of window", (char *) NULL);
return TCL_ERROR;
}
return ConfigureSlaves(interp, tkwin, argc-2, argv+2);
} else if ((c == 'f') && (strncmp(argv[1], "forget", length) == 0)) {
Tk_Window slave;
Packer *slavePtr;
int i;
for (i = 2; i < argc; i++) {
slave = Tk_NameToWindow(interp, argv[i], tkwin);
if (slave == NULL) {
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 ((c == 'i') && (strncmp(argv[1], "info", length) == 0)) {
register Packer *slavePtr;
Tk_Window slave;
char buffer[64 + TCL_INTEGER_SPACE * 4];
static char *sideNames[] = {"top", "bottom", "left", "right"};
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " info window\"", (char *) NULL);
return TCL_ERROR;
}
slave = Tk_NameToWindow(interp, argv[2], tkwin);
if (slave == NULL) {
return TCL_ERROR;
}
slavePtr = GetPacker(slave);
if (slavePtr->masterPtr == NULL) {
Tcl_AppendResult(interp, "window \"", argv[2],
"\" 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;
}
sprintf(buffer, " -ipadx %d -ipady %d -padx %d -pady %d",
slavePtr->iPadX/2, slavePtr->iPadY/2, slavePtr->padX/2,
slavePtr->padY/2);
Tcl_AppendResult(interp, buffer, " -side ", sideNames[slavePtr->side],
(char *) NULL);
} else if ((c == 'p') && (strncmp(argv[1], "propagate", length) == 0)) {
Tk_Window master;
Packer *masterPtr;
int propagate;
if (argc > 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " propagate window ?boolean?\"", (char *) NULL);
return TCL_ERROR;
}
master = Tk_NameToWindow(interp, argv[2], tkwin);
if (master == NULL) {
return TCL_ERROR;
}
masterPtr = GetPacker(master);
if (argc == 3) {
if (masterPtr->flags & DONT_PROPAGATE) {
Tcl_SetResult(interp, "0", TCL_STATIC);
} else {
Tcl_SetResult(interp, "1", TCL_STATIC);
}
return TCL_OK;
}
if (Tcl_GetBoolean(interp, argv[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 ((c == 's') && (strncmp(argv[1], "slaves", length) == 0)) {
Tk_Window master;
Packer *masterPtr, *slavePtr;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " slaves window\"", (char *) NULL);
return TCL_ERROR;
}
master = Tk_NameToWindow(interp, argv[2], tkwin);
if (master == NULL) {
return TCL_ERROR;
}
masterPtr = GetPacker(master);
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
Tcl_AppendElement(interp, Tk_PathName(slavePtr->tkwin));
}
} else if ((c == 'u') && (strncmp(argv[1], "unpack", length) == 0)) {
Tk_Window tkwin2;
Packer *packPtr;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " unpack window\"", (char *) NULL);
return TCL_ERROR;
}
tkwin2 = Tk_NameToWindow(interp, argv[2], tkwin);
if (tkwin2 == NULL) {
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);
}
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be configure, forget, info, ",
"propagate, or slaves", (char *) NULL);
return TCL_ERROR;
}
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 intBWidth; /* Width of internal border in parent window,
* if any. */
int abort; /* May get set to non-zero to abort this
* repacking operation. */
int borderX, borderY;
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.
*/
intBWidth = Tk_InternalBorderWidth(masterPtr->tkwin);
width = height = maxWidth = maxHeight = 2*intBWidth;
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 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 = cavityY = x = y = intBWidth;
cavityWidth = Tk_Width(masterPtr->tkwin) - 2*intBWidth;
cavityHeight = Tk_Height(masterPtr->tkwin) - 2*intBWidth;
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;
} else {
borderX = slavePtr->padX;
borderY = slavePtr->padY;
}
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;
}
borderX /= 2;
borderY /= 2;
switch (slavePtr->anchor) {
case TK_ANCHOR_N:
x = frameX + (frameWidth - width)/2;
y = frameY + borderY;
break;
case TK_ANCHOR_NE:
x = frameX + frameWidth - width - borderX;
y = frameY + borderY;
break;
case TK_ANCHOR_E:
x = frameX + frameWidth - width - borderX;
y = frameY + (frameHeight - height)/2;
break;
case TK_ANCHOR_SE:
x = frameX + frameWidth - width - borderX;
y = frameY + frameHeight - height - borderY;
break;
case TK_ANCHOR_S:
x = frameX + (frameWidth - width)/2;
y = frameY + frameHeight - height - borderY;
break;
case TK_ANCHOR_SW:
x = frameX + borderX;
y = frameY + frameHeight - height - borderY;
break;
case TK_ANCHOR_W:
x = frameX + borderX;
y = frameY + (frameHeight - height)/2;
break;
case TK_ANCHOR_NW:
x = frameX + borderX;
y = frameY + borderY;
break;
case TK_ANCHOR_CENTER:
x = frameX + (frameWidth - width)/2;
y = frameY + (frameHeight - height)/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->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