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stk/Tk/generic/tkGrid.c

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/*
* tkGrid.c --
*
* Grid based geometry manager.
*
* Copyright (c) 1996-1997 by Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* SCCS: @(#) tkGrid.c 1.39 97/10/10 10:12:03
*/
#include "tkInt.h"
#ifdef SCM_CODE
# undef Tcl_Alloc
# undef Tcl_Free
# ifdef STk_CODE
# define Tcl_Alloc(n) malloc(n)
# define Tcl_Free(p) free(p)
# else
# define Tcl_Alloc(n) ckalloc(n)
# define Tcl_Free(p) ckfree(p)
# endif
#endif
/*
* Convenience Macros
*/
#ifdef MAX
# undef MAX
#endif
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#ifdef MIN
# undef MIN
#endif
#define MIN(x,y) ((x) > (y) ? (y) : (x))
#define COLUMN (1) /* working on column offsets */
#define ROW (2) /* working on row offsets */
#define CHECK_ONLY (1) /* check max slot constraint */
#define CHECK_SPACE (2) /* alloc more space, don't change max */
/*
* Pre-allocate enough row and column slots for "typical" sized tables
* this value should be chosen so by the time the extra malloc's are
* required, the layout calculations overwehlm them. [A "slot" contains
* information for either a row or column, depending upon the context.]
*/
#define TYPICAL_SIZE 25 /* (arbitrary guess) */
#define PREALLOC 10 /* extra slots to allocate */
/*
* Data structures are allocated dynamically to support arbitrary sized tables.
* However, the space is proportional to the highest numbered slot with
* some non-default property. This limit is used to head off mistakes and
* denial of service attacks by limiting the amount of storage required.
*/
#define MAX_ELEMENT 10000
/*
* Special characters to support relative layouts.
*/
#define REL_SKIP 'x' /* Skip this column. */
#define REL_HORIZ '-' /* Extend previous widget horizontally. */
#define REL_VERT '^' /* Extend widget from row above. */
/*
* Structure to hold information for grid masters. A slot is either
* a row or column.
*/
typedef struct SlotInfo {
int minSize; /* The minimum size of this slot (in pixels).
* It is set via the rowconfigure or
* columnconfigure commands. */
int weight; /* The resize weight of this slot. (0) means
* this slot doesn't resize. Extra space in
* the layout is given distributed among slots
* inproportion to their weights. */
int pad; /* Extra padding, in pixels, required for
* this slot. This amount is "added" to the
* largest slave in the slot. */
int offset; /* This is a cached value used for
* introspection. It is the pixel
* offset of the right or bottom edge
* of this slot from the beginning of the
* layout. */
int temp; /* This is a temporary value used for
* calculating adjusted weights when
* shrinking the layout below its
* nominal size. */
} SlotInfo;
/*
* Structure to hold information during layout calculations. There
* is one of these for each slot, an array for each of the rows or columns.
*/
typedef struct GridLayout {
struct Gridder *binNextPtr; /* The next slave window in this bin.
* Each bin contains a list of all
* slaves whose spans are >1 and whose
* right edges fall in this slot. */
int minSize; /* Minimum size needed for this slot,
* in pixels. This is the space required
* to hold any slaves contained entirely
* in this slot, adjusted for any slot
* constrants, such as size or padding. */
int pad; /* Padding needed for this slot */
int weight; /* Slot weight, controls resizing. */
int minOffset; /* The minimum offset, in pixels, from
* the beginning of the layout to the
* right/bottom edge of the slot calculated
* from top/left to bottom/right. */
int maxOffset; /* The maximum offset, in pixels, from
* the beginning of the layout to the
* right-or-bottom edge of the slot calculated
* from bottom-or-right to top-or-left. */
} GridLayout;
/*
* Keep one of these for each geometry master.
*/
typedef struct {
SlotInfo *columnPtr; /* Pointer to array of column constraints. */
SlotInfo *rowPtr; /* Pointer to array of row constraints. */
int columnEnd; /* The last column occupied by any slave. */
int columnMax; /* The number of columns with constraints. */
int columnSpace; /* The number of slots currently allocated for
* column constraints. */
int rowEnd; /* The last row occupied by any slave. */
int rowMax; /* The number of rows with constraints. */
int rowSpace; /* The number of slots currently allocated
* for row constraints. */
int startX; /* Pixel offset of this layout within its
* parent. */
int startY; /* Pixel offset of this layout within its
* parent. */
} GridMaster;
/*
* For each window that the grid cares about (either because
* the window is managed by the grid or because the window
* has slaves that are managed by the grid), there is a
* structure of the following type:
*/
typedef struct Gridder {
Tk_Window tkwin; /* Tk token for window. NULL means that
* the window has been deleted, but the
* gridder hasn't had a chance to clean up
* yet because the structure is still in
* use. */
struct Gridder *masterPtr; /* Master window within which this window
* is managed (NULL means this window
* isn't managed by the gridder). */
struct Gridder *nextPtr; /* Next window managed within same
* parent. List order doesn't matter. */
struct Gridder *slavePtr; /* First in list of slaves managed
* inside this window (NULL means
* no grid slaves). */
GridMaster *masterDataPtr; /* Additional data for geometry master. */
int column, row; /* Location in the grid (starting
* from zero). */
int numCols, numRows; /* Number of columns or rows this slave spans.
* Should be at least 1. */
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 sticky; /* which sides of its cavity this window
* sticks to. See below for definitions */
int doubleBw; /* Twice the window's last known border
* width. If this changes, the window
* must be re-arranged within its parent. */
int *abortPtr; /* If non-NULL, it means that there is a nested
* call to ArrangeGrid 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. */
/*
* These fields are used temporarily for layout calculations only.
*/
struct Gridder *binNextPtr; /* Link to next span>1 slave in this bin. */
int size; /* Nominal size (width or height) in pixels
* of the slave. This includes the padding. */
} Gridder;
/* Flag values for "sticky"ness The 16 combinations subsume the packer's
* notion of anchor and fill.
*
* STICK_NORTH This window sticks to the top of its cavity.
* STICK_EAST This window sticks to the right edge of its cavity.
* STICK_SOUTH This window sticks to the bottom of its cavity.
* STICK_WEST This window sticks to the left edge of its cavity.
*/
#define STICK_NORTH 1
#define STICK_EAST 2
#define STICK_SOUTH 4
#define STICK_WEST 8
/*
* Flag values for Grid structures:
*
* REQUESTED_RELAYOUT: 1 means a Tcl_DoWhenIdle request
* has already been made to re-arrange
* all the slaves of this window.
*
* 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_RELAYOUT 1
#define DONT_PROPAGATE 2
/*
* Hash table used to map from Tk_Window tokens to corresponding
* Grid structures:
*/
static Tcl_HashTable gridHashTable;
static int initialized = 0;
/*
* Prototypes for procedures used only in this file:
*/
static void AdjustForSticky _ANSI_ARGS_((Gridder *slavePtr, int *xPtr,
int *yPtr, int *widthPtr, int *heightPtr));
static int AdjustOffsets _ANSI_ARGS_((int width,
int elements, SlotInfo *slotPtr));
static void ArrangeGrid _ANSI_ARGS_((ClientData clientData));
static int CheckSlotData _ANSI_ARGS_((Gridder *masterPtr, int slot,
int slotType, int checkOnly));
static int ConfigureSlaves _ANSI_ARGS_((Tcl_Interp *interp,
Tk_Window tkwin, int argc, char *argv[]));
static void DestroyGrid _ANSI_ARGS_((char *memPtr));
static Gridder *GetGrid _ANSI_ARGS_((Tk_Window tkwin));
static void GridStructureProc _ANSI_ARGS_((
ClientData clientData, XEvent *eventPtr));
static void GridLostSlaveProc _ANSI_ARGS_((ClientData clientData,
Tk_Window tkwin));
static void GridReqProc _ANSI_ARGS_((ClientData clientData,
Tk_Window tkwin));
static void InitMasterData _ANSI_ARGS_((Gridder *masterPtr));
static int ResolveConstraints _ANSI_ARGS_((Gridder *gridPtr,
int rowOrColumn, int maxOffset));
static void SetGridSize _ANSI_ARGS_((Gridder *gridPtr));
static void StickyToString _ANSI_ARGS_((int flags, char *result));
static int StringToSticky _ANSI_ARGS_((char *string));
static void Unlink _ANSI_ARGS_((Gridder *gridPtr));
static Tk_GeomMgr gridMgrType = {
"grid", /* name */
GridReqProc, /* requestProc */
GridLostSlaveProc, /* lostSlaveProc */
};
/*
*--------------------------------------------------------------
*
* Tk_GridCmd --
*
* This procedure is invoked to process the "grid" 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_GridCmd(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;
Gridder *masterPtr; /* master grid record */
GridMaster *gridPtr; /* pointer to grid data */
size_t length; /* streing length of argument */
char c; /* 1st character of argument */
if ((argc >= 2) && ((argv[1][0] == '.') || (argv[1][0] == REL_SKIP) ||
(argv[1][0] == REL_VERT))) {
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 == 'b') && (strncmp(argv[1], "bbox", length) == 0)) {
Tk_Window master;
int row, column; /* origin for bounding box */
int row2, column2; /* end of bounding box */
int endX, endY; /* last column/row in the layout */
int x=0, y=0; /* starting pixels for this bounding box */
int width, height; /* size of the bounding box */
if (argc!=3 && argc != 5 && argc != 7) {
Tcl_AppendResult(interp, "wrong number of arguments: ",
"must be \"",argv[0],
" bbox master ?column row ?column row??\"",
(char *) NULL);
return TCL_ERROR;
}
master = Tk_NameToWindow(interp, argv[2], tkwin);
if (master == NULL) {
return TCL_ERROR;
}
masterPtr = GetGrid(master);
if (argc >= 5) {
if (Tcl_GetInt(interp, argv[3], &column) != TCL_OK) {
return TCL_ERROR;
}
if (Tcl_GetInt(interp, argv[4], &row) != TCL_OK) {
return TCL_ERROR;
}
column2 = column;
row2 = row;
}
if (argc == 7) {
if (Tcl_GetInt(interp, argv[5], &column2) != TCL_OK) {
return TCL_ERROR;
}
if (Tcl_GetInt(interp, argv[6], &row2) != TCL_OK) {
return TCL_ERROR;
}
}
gridPtr = masterPtr->masterDataPtr;
if (gridPtr == NULL) {
sprintf(interp->result, "%d %d %d %d",0,0,0,0);
return(TCL_OK);
}
SetGridSize(masterPtr);
endX = MAX(gridPtr->columnEnd, gridPtr->columnMax);
endY = MAX(gridPtr->rowEnd, gridPtr->rowMax);
if ((endX == 0) || (endY == 0)) {
sprintf(interp->result, "%d %d %d %d",0,0,0,0);
return(TCL_OK);
}
if (argc == 3) {
row = column = 0;
row2 = endY;
column2 = endX;
}
if (column > column2) {
int temp = column;
column = column2, column2 = temp;
}
if (row > row2) {
int temp = row;
row = row2, row2 = temp;
}
if (column > 0 && column < endX) {
x = gridPtr->columnPtr[column-1].offset;
} else if (column > 0) {
x = gridPtr->columnPtr[endX-1].offset;
}
if (row > 0 && row < endY) {
y = gridPtr->rowPtr[row-1].offset;
} else if (row > 0) {
y = gridPtr->rowPtr[endY-1].offset;
}
if (column2 < 0) {
width = 0;
} else if (column2 >= endX) {
width = gridPtr->columnPtr[endX-1].offset - x;
} else {
width = gridPtr->columnPtr[column2].offset - x;
}
if (row2 < 0) {
height = 0;
} else if (row2 >= endY) {
height = gridPtr->rowPtr[endY-1].offset - y;
} else {
height = gridPtr->rowPtr[row2].offset - y;
}
sprintf(interp->result, "%d %d %d %d",
x + gridPtr->startX, y + gridPtr->startY, width, height);
} 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)) ||
((c == 'r') && (strncmp(argv[1], "remove", length) == 0))) {
Tk_Window slave;
Gridder *slavePtr;
int i;
for (i = 2; i < argc; i++) {
slave = Tk_NameToWindow(interp, argv[i], tkwin);
if (slave == NULL) {
return TCL_ERROR;
}
slavePtr = GetGrid(slave);
if (slavePtr->masterPtr != NULL) {
/*
* For "forget", reset all the settings to their defaults
*/
if (c == 'f') {
slavePtr->column = slavePtr->row = -1;
slavePtr->numCols = 1;
slavePtr->numRows = 1;
slavePtr->padX = slavePtr->padY = 0;
slavePtr->iPadX = slavePtr->iPadY = 0;
slavePtr->doubleBw = 2*Tk_Changes(tkwin)->border_width;
slavePtr->flags = 0;
slavePtr->sticky = 0;
}
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 Gridder *slavePtr;
Tk_Window slave;
char buffer[70];
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 = GetGrid(slave);
if (slavePtr->masterPtr == NULL) {
interp->result[0] = '\0';
return TCL_OK;
}
#ifdef SCM_CODE
Tcl_AppendElement(interp, ":in");
#else
Tcl_AppendElement(interp, "-in");
#endif
Tcl_AppendElement(interp, Tk_PathName(slavePtr->masterPtr->tkwin));
#ifdef SCM_CODE
sprintf(buffer, " :column %d :row %d :columnspan %d :rowspan %d",
#else
sprintf(buffer, " -column %d -row %d -columnspan %d -rowspan %d",
#endif
slavePtr->column, slavePtr->row,
slavePtr->numCols, slavePtr->numRows);
Tcl_AppendResult(interp, buffer, (char *) NULL);
#ifdef SCM_CODE
sprintf(buffer, " :ipadx %d :ipady %d :padx %d :pady %d",
#else
sprintf(buffer, " -ipadx %d -ipady %d -padx %d -pady %d",
#endif
slavePtr->iPadX/2, slavePtr->iPadY/2, slavePtr->padX/2,
slavePtr->padY/2);
Tcl_AppendResult(interp, buffer, (char *) NULL);
StickyToString(slavePtr->sticky,buffer);
#ifdef SCM_CODE
Tcl_AppendResult(interp, " :sticky ", buffer, (char *) NULL);
#else
Tcl_AppendResult(interp, " -sticky ", buffer, (char *) NULL);
#endif
} else if((c == 'l') && (strncmp(argv[1], "location", length) == 0)) {
Tk_Window master;
register SlotInfo *slotPtr;
int x, y; /* Offset in pixels, from edge of parent. */
int i, j; /* Corresponding column and row indeces. */
int endX, endY; /* end of grid */
if (argc != 5) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " location master x y\"", (char *)NULL);
return TCL_ERROR;
}
master = Tk_NameToWindow(interp, argv[2], tkwin);
if (master == NULL) {
return TCL_ERROR;
}
if (Tk_GetPixels(interp, master, argv[3], &x) != TCL_OK) {
return TCL_ERROR;
}
if (Tk_GetPixels(interp, master, argv[4], &y) != TCL_OK) {
return TCL_ERROR;
}
masterPtr = GetGrid(master);
if (masterPtr->masterDataPtr == NULL) {
sprintf(interp->result, "%d %d", -1, -1);
return TCL_OK;
}
gridPtr = masterPtr->masterDataPtr;
/*
* Update any pending requests. This is not always the
* steady state value, as more configure events could be in
* the pipeline, but its as close as its easy to get.
*/
while (masterPtr->flags & REQUESTED_RELAYOUT) {
Tk_CancelIdleCall(ArrangeGrid, (ClientData) masterPtr);
ArrangeGrid ((ClientData) masterPtr);
}
SetGridSize(masterPtr);
endX = MAX(gridPtr->columnEnd, gridPtr->columnMax);
endY = MAX(gridPtr->rowEnd, gridPtr->rowMax);
slotPtr = masterPtr->masterDataPtr->columnPtr;
if (x < masterPtr->masterDataPtr->startX) {
i = -1;
} else {
x -= masterPtr->masterDataPtr->startX;
for (i=0;slotPtr[i].offset < x && i < endX; i++) {
/* null body */
}
}
slotPtr = masterPtr->masterDataPtr->rowPtr;
if (y < masterPtr->masterDataPtr->startY) {
j = -1;
} else {
y -= masterPtr->masterDataPtr->startY;
for (j=0;slotPtr[j].offset < y && j < endY; j++) {
/* null body */
}
}
sprintf(interp->result, "%d %d", i, j);
} else if ((c == 'p') && (strncmp(argv[1], "propagate", length) == 0)) {
Tk_Window master;
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 = GetGrid(master);
if (argc == 3) {
#ifdef SCM_CODE
interp->result = (masterPtr->flags & DONT_PROPAGATE) ? "#f" : "#t";
#else
interp->result = (masterPtr->flags & DONT_PROPAGATE) ? "0" : "1";
#endif
return TCL_OK;
}
if (Tcl_GetBoolean(interp, argv[3], &propagate) != TCL_OK) {
return TCL_ERROR;
}
if ((!propagate) ^ (masterPtr->flags&DONT_PROPAGATE)) {
masterPtr->flags ^= DONT_PROPAGATE;
/*
* Re-arrange 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_RELAYOUT)) {
masterPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) masterPtr);
}
}
} else if ((c == 's') && (strncmp(argv[1], "size", length) == 0)
&& (length > 1)) {
Tk_Window master;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " size window\"", (char *) NULL);
return TCL_ERROR;
}
master = Tk_NameToWindow(interp, argv[2], tkwin);
if (master == NULL) {
return TCL_ERROR;
}
masterPtr = GetGrid(master);
if (masterPtr->masterDataPtr != NULL) {
SetGridSize(masterPtr);
gridPtr = masterPtr->masterDataPtr;
sprintf(interp->result, "%d %d",
MAX(gridPtr->columnEnd, gridPtr->columnMax),
MAX(gridPtr->rowEnd, gridPtr->rowMax));
} else {
sprintf(interp->result, "%d %d",0, 0);
}
} else if ((c == 's') && (strncmp(argv[1], "slaves", length) == 0)
&& (length > 1)) {
Tk_Window master;
Gridder *slavePtr;
int i, value;
int row = -1, column = -1;
if ((argc < 3) || ((argc%2) == 0)) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " slaves window ?-option value...?\"",
(char *) NULL);
return TCL_ERROR;
}
for (i=3; i<argc; i+=2) {
length = strlen(argv[i]);
if ((*argv[i] != '-') || (length < 2)) {
Tcl_AppendResult(interp, "invalid args: should be \"",
argv[0], " slaves window ?-option value...?\"",
(char *) NULL);
return TCL_ERROR;
}
if (Tcl_GetInt(interp, argv[i+1], &value) != TCL_OK) {
return TCL_ERROR;
}
if (value < 0) {
Tcl_AppendResult(interp, argv[i],
" is an invalid value: should NOT be < 0",
(char *) NULL);
return TCL_ERROR;
}
if (strncmp(argv[i], "-column", length) == 0) {
column = value;
} else if (strncmp(argv[i], "-row", length) == 0) {
row = value;
} else {
Tcl_AppendResult(interp, argv[i],
" is an invalid option: should be \"",
#ifdef SCM_CODE
":row, :column\"",
#else
"-row, -column\"",
#endif
(char *) NULL);
return TCL_ERROR;
}
}
master = Tk_NameToWindow(interp, argv[2], tkwin);
if (master == NULL) {
return TCL_ERROR;
}
masterPtr = GetGrid(master);
#ifdef SCM_CODE
Tcl_AppendResult(interp, "(", NULL);
#endif
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
if (column>=0 && (slavePtr->column > column
|| slavePtr->column+slavePtr->numCols-1 < column)) {
continue;
}
if (row>=0 && (slavePtr->row > row ||
slavePtr->row+slavePtr->numRows-1 < row)) {
continue;
}
Tcl_AppendElement(interp, Tk_PathName(slavePtr->tkwin));
}
#ifdef SCM_CODE
Tcl_AppendResult(interp, ")", NULL);
#endif
/*
* Sample argument combinations:
* grid columnconfigure <master> <index> -option
* grid columnconfigure <master> <index> -option value -option value
* grid rowconfigure <master> <index>
* grid rowconfigure <master> <index> -option
* grid rowconfigure <master> <index> -option value -option value.
*/
} else if(((c == 'c') && (strncmp(argv[1], "columnconfigure", length) == 0)
&& (length >= 3)) ||
((c == 'r') && (strncmp(argv[1], "rowconfigure", length) == 0)
&& (length >=2))) {
Tk_Window master;
SlotInfo *slotPtr = NULL;
int slot; /* the column or row number */
size_t length; /* the # of chars in the "-option" string */
int slotType; /* COLUMN or ROW */
int size; /* the configuration value */
int checkOnly; /* check the size only */
int argcPtr; /* Number of items in index list */
char **argvPtr; /* array of indeces */
char **indexP; /* String value of current index list item. */
int ok; /* temporary TCL result code */
int i;
if (((argc%2 != 0) && (argc>6)) || (argc < 4)) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" ", argv[1], " master index ?-option value...?\"",
(char *)NULL);
return TCL_ERROR;
}
master = Tk_NameToWindow(interp, argv[2], tkwin);
if (master == NULL) {
return TCL_ERROR;
}
if (Tcl_SplitList(interp, argv[3], &argcPtr, &argvPtr) != TCL_OK) {
return TCL_ERROR;
}
checkOnly = ((argc == 4) || (argc == 5));
masterPtr = GetGrid(master);
slotType = (c == 'c') ? COLUMN : ROW;
if (checkOnly && argcPtr > 1) {
Tcl_AppendResult(interp, argv[3],
" must be a single element.", (char *) NULL);
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
}
for (indexP=argvPtr; *indexP != NULL; indexP++) {
if (Tcl_GetInt(interp, *indexP, &slot) != TCL_OK) {
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
}
ok = CheckSlotData(masterPtr, slot, slotType, checkOnly);
if ((ok!=TCL_OK) && ((argc<4) || (argc>5))) {
Tcl_AppendResult(interp, argv[0],
" ", argv[1], ": \"", *argvPtr,"\" is out of range",
(char *) NULL);
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
} else if (ok == TCL_OK) {
slotPtr = (slotType == COLUMN) ?
masterPtr->masterDataPtr->columnPtr :
masterPtr->masterDataPtr->rowPtr;
}
/*
* Return all of the options for this row or column. If the
* request is out of range, return all 0's.
*/
if (argc == 4) {
Tcl_Free((char *)argvPtr);
}
if ((argc == 4) && (ok == TCL_OK)) {
sprintf(interp->result,"-minsize %d -pad %d -weight %d",
slotPtr[slot].minSize,slotPtr[slot].pad,
slotPtr[slot].weight);
return (TCL_OK);
} else if (argc == 4) {
sprintf(interp->result,"-minsize %d -pad %d -weight %d", 0,0,0);
return (TCL_OK);
}
/*
* Loop through each option value pair, setting the values as required.
* If only one option is given, with no value, the current value is
* returned.
*/
for (i=4; i<argc; i+=2) {
length = strlen(argv[i]);
if ((*argv[i] != '-') || length < 2) {
Tcl_AppendResult(interp, "invalid arg \"",
argv[i], "\" :expecting -minsize, -pad, or -weight.",
(char *) NULL);
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
}
if (strncmp(argv[i], "-minsize", length) == 0) {
if (argc == 5) {
int value = ok == TCL_OK ? slotPtr[slot].minSize : 0;
sprintf(interp->result,"%d",value);
} else if (Tk_GetPixels(interp, master, argv[i+1], &size)
!= TCL_OK) {
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
} else {
slotPtr[slot].minSize = size;
}
}
else if (strncmp(argv[i], "-weight", length) == 0) {
int wt;
if (argc == 5) {
int value = ok == TCL_OK ? slotPtr[slot].weight : 0;
sprintf(interp->result,"%d",value);
} else if (Tcl_GetInt(interp, argv[i+1], &wt) != TCL_OK) {
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
} else if (wt < 0) {
Tcl_AppendResult(interp, "invalid arg \"", argv[i],
"\": should be non-negative", (char *) NULL);
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
} else {
slotPtr[slot].weight = wt;
}
}
else if (strncmp(argv[i], "-pad", length) == 0) {
if (argc == 5) {
int value = ok == TCL_OK ? slotPtr[slot].pad : 0;
sprintf(interp->result,"%d",value);
} else if (Tk_GetPixels(interp, master, argv[i+1], &size)
!= TCL_OK) {
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
} else if (size < 0) {
Tcl_AppendResult(interp, "invalid arg \"", argv[i],
"\": should be non-negative", (char *) NULL);
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
} else {
slotPtr[slot].pad = size;
}
} else {
Tcl_AppendResult(interp, "invalid arg \"",
argv[i], "\": expecting -minsize, -pad, or -weight.",
(char *) NULL);
Tcl_Free((char *)argvPtr);
return TCL_ERROR;
}
}
}
Tcl_Free((char *)argvPtr);
/*
* If we changed a property, re-arrange the table,
* and check for constraint shrinkage.
*/
if (argc != 5) {
if (slotType == ROW) {
int last = masterPtr->masterDataPtr->rowMax - 1;
while ((last >= 0) && (slotPtr[last].weight == 0)
&& (slotPtr[last].pad == 0)
&& (slotPtr[last].minSize == 0)) {
last--;
}
masterPtr->masterDataPtr->rowMax = last+1;
} else {
int last = masterPtr->masterDataPtr->columnMax - 1;
while ((last >= 0) && (slotPtr[last].weight == 0)
&& (slotPtr[last].pad == 0)
&& (slotPtr[last].minSize == 0)) {
last--;
}
masterPtr->masterDataPtr->columnMax = last + 1;
}
if (masterPtr->abortPtr != NULL) {
*masterPtr->abortPtr = 1;
}
if (!(masterPtr->flags & REQUESTED_RELAYOUT)) {
masterPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) masterPtr);
}
}
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be bbox, columnconfigure, configure, forget, info, ",
"location, propagate, remove, rowconfigure, size, or slaves.",
(char *) NULL);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* GridReqProc --
*
* This procedure is invoked by Tk_GeometryRequest for
* windows managed by the grid.
*
* Results:
* None.
*
* Side effects:
* Arranges for tkwin, and all its managed siblings, to
* be re-arranged at the next idle point.
*
*--------------------------------------------------------------
*/
static void
GridReqProc(clientData, tkwin)
ClientData clientData; /* Grid's information about
* window that got new preferred
* geometry. */
Tk_Window tkwin; /* Other Tk-related information
* about the window. */
{
register Gridder *gridPtr = (Gridder *) clientData;
gridPtr = gridPtr->masterPtr;
if (!(gridPtr->flags & REQUESTED_RELAYOUT)) {
gridPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) gridPtr);
}
}
/*
*--------------------------------------------------------------
*
* GridLostSlaveProc --
*
* 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 grid-related information about the slave.
*
*--------------------------------------------------------------
*/
static void
GridLostSlaveProc(clientData, tkwin)
ClientData clientData; /* Grid structure for slave window that
* was stolen away. */
Tk_Window tkwin; /* Tk's handle for the slave window. */
{
register Gridder *slavePtr = (Gridder *) clientData;
if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) {
Tk_UnmaintainGeometry(slavePtr->tkwin, slavePtr->masterPtr->tkwin);
}
Unlink(slavePtr);
Tk_UnmapWindow(slavePtr->tkwin);
}
/*
*--------------------------------------------------------------
*
* AdjustOffsets --
*
* This procedure adjusts the size of the layout to fit in the
* space provided. If it needs more space, the extra is added
* according to the weights. If it needs less, the space is removed
* according to the weights, but at no time does the size drop below
* the minsize specified for that slot.
*
* Results:
* The initial offset of the layout,
* if all the weights are zero, else 0.
*
* Side effects:
* The slot offsets are modified to shrink the layout.
*
*--------------------------------------------------------------
*/
static int
AdjustOffsets(size, slots, slotPtr)
int size; /* The total layout size (in pixels). */
int slots; /* Number of slots. */
register SlotInfo *slotPtr; /* Pointer to slot array. */
{
register int slot; /* Current slot. */
int diff; /* Extra pixels needed to add to the layout. */
int totalWeight = 0; /* Sum of the weights for all the slots. */
int weight = 0; /* Sum of the weights so far. */
int minSize = 0; /* Minimum possible layout size. */
int newDiff; /* The most pixels that can be added on
* the current pass. */
diff = size - slotPtr[slots-1].offset;
/*
* The layout is already the correct size; all done.
*/
if (diff == 0) {
return(0);
}
/*
* If all the weights are zero, center the layout in its parent if
* there is extra space, else clip on the bottom/right.
*/
for (slot=0; slot < slots; slot++) {
totalWeight += slotPtr[slot].weight;
}
if (totalWeight == 0 ) {
return(diff > 0 ? diff/2 : 0);
}
/*
* Add extra space according to the slot weights. This is done
* cumulatively to prevent round-off error accumulation.
*/
if (diff > 0) {
for (weight=slot=0; slot < slots; slot++) {
weight += slotPtr[slot].weight;
slotPtr[slot].offset += diff * weight / totalWeight;
}
return(0);
}
/*
* The layout must shrink below its requested size. Compute the
* minimum possible size by looking at the slot minSizes.
*/
for (slot=0; slot < slots; slot++) {
if (slotPtr[slot].weight > 0) {
minSize += slotPtr[slot].minSize;
} else if (slot > 0) {
minSize += slotPtr[slot].offset - slotPtr[slot-1].offset;
} else {
minSize += slotPtr[slot].offset;
}
}
/*
* If the requested size is less than the minimum required size,
* set the slot sizes to their minimum values, then clip on the
* bottom/right.
*/
if (size <= minSize) {
int offset = 0;
for (slot=0; slot < slots; slot++) {
if (slotPtr[slot].weight > 0) {
offset += slotPtr[slot].minSize;
} else if (slot > 0) {
offset += slotPtr[slot].offset - slotPtr[slot-1].offset;
} else {
offset += slotPtr[slot].offset;
}
slotPtr[slot].offset = offset;
}
return(0);
}
/*
* Remove space from slots according to their weights. The weights
* get renormalized anytime a slot shrinks to its minimum size.
*/
while (diff < 0) {
/*
* Find the total weight for the shrinkable slots.
*/
for (totalWeight=slot=0; slot < slots; slot++) {
int current = (slot == 0) ? slotPtr[slot].offset :
slotPtr[slot].offset - slotPtr[slot-1].offset;
if (current > slotPtr[slot].minSize) {
totalWeight += slotPtr[slot].weight;
slotPtr[slot].temp = slotPtr[slot].weight;
} else {
slotPtr[slot].temp = 0;
}
}
if (totalWeight == 0) {
break;
}
/*
* Find the maximum amount of space we can distribute this pass.
*/
newDiff = diff;
for (slot = 0; slot < slots; slot++) {
int current; /* current size of this slot */
int maxDiff; /* max diff that would cause
* this slot to equal its minsize */
if (slotPtr[slot].temp == 0) {
continue;
}
current = (slot == 0) ? slotPtr[slot].offset :
slotPtr[slot].offset - slotPtr[slot-1].offset;
maxDiff = totalWeight * (slotPtr[slot].minSize - current)
/ slotPtr[slot].temp;
if (maxDiff > newDiff) {
newDiff = maxDiff;
}
}
/*
* Now distribute the space.
*/
for (weight=slot=0; slot < slots; slot++) {
weight += slotPtr[slot].temp;
slotPtr[slot].offset += newDiff * weight / totalWeight;
}
diff -= newDiff;
}
return(0);
}
/*
*--------------------------------------------------------------
*
* AdjustForSticky --
*
* This procedure adjusts the size of a slave in its cavity based
* on its "sticky" flags.
*
* Results:
* The input x, y, width, and height are changed to represent the
* desired coordinates of the slave.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
static void
AdjustForSticky(slavePtr, xPtr, yPtr, widthPtr, heightPtr)
Gridder *slavePtr; /* Slave window to arrange in its cavity. */
int *xPtr; /* Pixel location of the left edge of the cavity. */
int *yPtr; /* Pixel location of the top edge of the cavity. */
int *widthPtr; /* Width of the cavity (in pixels). */
int *heightPtr; /* Height of the cavity (in pixels). */
{
int diffx=0; /* Cavity width - slave width. */
int diffy=0; /* Cavity hight - slave height. */
int sticky = slavePtr->sticky;
*xPtr += slavePtr->padX/2;
*widthPtr -= slavePtr->padX;
*yPtr += slavePtr->padY/2;
*heightPtr -= slavePtr->padY;
if (*widthPtr > (Tk_ReqWidth(slavePtr->tkwin) + slavePtr->iPadX)) {
diffx = *widthPtr - (Tk_ReqWidth(slavePtr->tkwin) + slavePtr->iPadX);
*widthPtr = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->iPadX;
}
if (*heightPtr > (Tk_ReqHeight(slavePtr->tkwin) + slavePtr->iPadY)) {
diffy = *heightPtr - (Tk_ReqHeight(slavePtr->tkwin) + slavePtr->iPadY);
*heightPtr = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->iPadY;
}
if (sticky&STICK_EAST && sticky&STICK_WEST) {
*widthPtr += diffx;
}
if (sticky&STICK_NORTH && sticky&STICK_SOUTH) {
*heightPtr += diffy;
}
if (!(sticky&STICK_WEST)) {
*xPtr += (sticky&STICK_EAST) ? diffx : diffx/2;
}
if (!(sticky&STICK_NORTH)) {
*yPtr += (sticky&STICK_SOUTH) ? diffy : diffy/2;
}
}
/*
*--------------------------------------------------------------
*
* ArrangeGrid --
*
* This procedure is invoked (using the Tcl_DoWhenIdle
* mechanism) to re-layout a set of windows managed by
* the grid. It is invoked at idle time so that a
* series of grid requests can be merged into a single
* layout operation.
*
* Results:
* None.
*
* Side effects:
* The slaves of masterPtr may get resized or moved.
*
*--------------------------------------------------------------
*/
static void
ArrangeGrid(clientData)
ClientData clientData; /* Structure describing parent whose slaves
* are to be re-layed out. */
{
register Gridder *masterPtr = (Gridder *) clientData;
register Gridder *slavePtr;
GridMaster *slotPtr = masterPtr->masterDataPtr;
int abort;
int width, height; /* requested size of layout, in pixels */
int realWidth, realHeight; /* actual size layout should take-up */
masterPtr->flags &= ~REQUESTED_RELAYOUT;
/*
* If the parent has no slaves anymore, then don't do anything
* at all: just leave the parent's size as-is. Otherwise there is
* no way to "relinquish" control over the parent so another geometry
* manager can take over.
*/
if (masterPtr->slavePtr == NULL) {
return;
}
if (masterPtr->masterDataPtr == NULL) {
return;
}
/*
* Abort any nested call to ArrangeGrid 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);
/*
* Call the constraint engine to fill in the row and column offsets.
*/
SetGridSize(masterPtr);
width = ResolveConstraints(masterPtr, COLUMN, 0);
height = ResolveConstraints(masterPtr, ROW, 0);
width += 2*Tk_InternalBorderWidth(masterPtr->tkwin);
height += 2*Tk_InternalBorderWidth(masterPtr->tkwin);
if (((width != Tk_ReqWidth(masterPtr->tkwin))
|| (height != Tk_ReqHeight(masterPtr->tkwin)))
&& !(masterPtr->flags & DONT_PROPAGATE)) {
Tk_GeometryRequest(masterPtr->tkwin, width, height);
if (width>1 && height>1) {
masterPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) masterPtr);
}
masterPtr->abortPtr = NULL;
Tcl_Release((ClientData) masterPtr);
return;
}
/*
* If the currently requested layout size doesn't match the parent's
* window size, then adjust the slot offsets according to the
* weights. If all of the weights are zero, center the layout in
* its parent. I haven't decided what to do if the parent is smaller
* than the requested size.
*/
realWidth = Tk_Width(masterPtr->tkwin) -
2*Tk_InternalBorderWidth(masterPtr->tkwin);
realHeight = Tk_Height(masterPtr->tkwin) -
2*Tk_InternalBorderWidth(masterPtr->tkwin);
slotPtr->startX = AdjustOffsets(realWidth,
MAX(slotPtr->columnEnd,slotPtr->columnMax), slotPtr->columnPtr);
slotPtr->startY = AdjustOffsets(realHeight,
MAX(slotPtr->rowEnd,slotPtr->rowMax), slotPtr->rowPtr);
slotPtr->startX += Tk_InternalBorderWidth(masterPtr->tkwin);
slotPtr->startY += Tk_InternalBorderWidth(masterPtr->tkwin);
/*
* Now adjust the actual size of the slave to its cavity by
* computing the cavity size, and adjusting the widget according
* to its stickyness.
*/
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL && !abort;
slavePtr = slavePtr->nextPtr) {
int x, y; /* top left coordinate */
int width, height; /* slot or slave size */
int col = slavePtr->column;
int row = slavePtr->row;
x = (col>0) ? slotPtr->columnPtr[col-1].offset : 0;
y = (row>0) ? slotPtr->rowPtr[row-1].offset : 0;
width = slotPtr->columnPtr[slavePtr->numCols+col-1].offset - x;
height = slotPtr->rowPtr[slavePtr->numRows+row-1].offset - y;
x += slotPtr->startX;
y += slotPtr->startY;
AdjustForSticky(slavePtr, &x, &y, &width, &height);
/*
* Now put the window in the proper spot. (This was taken directly
* from tkPack.c.) 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) {
break;
}
/*
* 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);
}
}
}
masterPtr->abortPtr = NULL;
Tcl_Release((ClientData) masterPtr);
}
/*
*--------------------------------------------------------------
*
* ResolveConstraints --
*
* Resolve all of the column and row boundaries. Most of
* the calculations are identical for rows and columns, so this procedure
* is called twice, once for rows, and again for columns.
*
* Results:
* The offset (in pixels) from the left/top edge of this layout is
* returned.
*
* Side effects:
* The slot offsets are copied into the SlotInfo structure for the
* geometry master.
*
*--------------------------------------------------------------
*/
static int
ResolveConstraints(masterPtr, slotType, maxOffset)
Gridder *masterPtr; /* The geometry master for this grid. */
int slotType; /* Either ROW or COLUMN. */
int maxOffset; /* The actual maximum size of this layout
* in pixels, or 0 (not currently used). */
{
register SlotInfo *slotPtr; /* Pointer to row/col constraints. */
register Gridder *slavePtr; /* List of slave windows in this grid. */
int constraintCount; /* Count of rows or columns that have
* constraints. */
int slotCount; /* Last occupied row or column. */
int gridCount; /* The larger of slotCount and constraintCount.
*/
GridLayout *layoutPtr; /* Temporary layout structure. */
int requiredSize; /* The natural size of the grid (pixels).
* This is the minimum size needed to
* accomodate all of the slaves at their
* requested sizes. */
int offset; /* The pixel offset of the right edge of the
* current slot from the beginning of the
* layout. */
int slot; /* The current slot. */
int start; /* The first slot of a contiguous set whose
* constraints are not yet fully resolved. */
int end; /* The Last slot of a contiguous set whose
* constraints are not yet fully resolved. */
/*
* For typical sized tables, we'll use stack space for the layout data
* to avoid the overhead of a malloc and free for every layout.
*/
GridLayout layoutData[TYPICAL_SIZE + 1];
if (slotType == COLUMN) {
constraintCount = masterPtr->masterDataPtr->columnMax;
slotCount = masterPtr->masterDataPtr->columnEnd;
slotPtr = masterPtr->masterDataPtr->columnPtr;
} else {
constraintCount = masterPtr->masterDataPtr->rowMax;
slotCount = masterPtr->masterDataPtr->rowEnd;
slotPtr = masterPtr->masterDataPtr->rowPtr;
}
/*
* Make sure there is enough memory for the layout.
*/
gridCount = MAX(constraintCount,slotCount);
if (gridCount >= TYPICAL_SIZE) {
layoutPtr = (GridLayout *) Tcl_Alloc(sizeof(GridLayout) * (1+gridCount));
} else {
layoutPtr = layoutData;
}
/*
* Allocate an extra layout slot to represent the left/top edge of
* the 0th slot to make it easier to calculate slot widths from
* offsets without special case code.
* Initialize the "dummy" slot to the left/top of the table.
* This slot avoids special casing the first slot.
*/
layoutPtr->minOffset = 0;
layoutPtr->maxOffset = 0;
layoutPtr++;
/*
* Step 1.
* Copy the slot constraints into the layout structure,
* and initialize the rest of the fields.
*/
for (slot=0; slot < constraintCount; slot++) {
layoutPtr[slot].minSize = slotPtr[slot].minSize;
layoutPtr[slot].weight = slotPtr[slot].weight;
layoutPtr[slot].pad = slotPtr[slot].pad;
layoutPtr[slot].binNextPtr = NULL;
}
for(;slot<gridCount;slot++) {
layoutPtr[slot].minSize = 0;
layoutPtr[slot].weight = 0;
layoutPtr[slot].pad = 0;
layoutPtr[slot].binNextPtr = NULL;
}
/*
* Step 2.
* Slaves with a span of 1 are used to determine the minimum size of
* each slot. Slaves whose span is two or more slots don't
* contribute to the minimum size of each slot directly, but can cause
* slots to grow if their size exceeds the the sizes of the slots they
* span.
*
* Bin all slaves whose spans are > 1 by their right edges. This
* allows the computation on minimum and maximum possible layout
* sizes at each slot boundary, without the need to re-sort the slaves.
*/
switch (slotType) {
case COLUMN:
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
int rightEdge = slavePtr->column + slavePtr->numCols - 1;
slavePtr->size = Tk_ReqWidth(slavePtr->tkwin) +
slavePtr->padX + slavePtr->iPadX + slavePtr->doubleBw;
if (slavePtr->numCols > 1) {
slavePtr->binNextPtr = layoutPtr[rightEdge].binNextPtr;
layoutPtr[rightEdge].binNextPtr = slavePtr;
} else {
int size = slavePtr->size + layoutPtr[rightEdge].pad;
if (size > layoutPtr[rightEdge].minSize) {
layoutPtr[rightEdge].minSize = size;
}
}
}
break;
case ROW:
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
int rightEdge = slavePtr->row + slavePtr->numRows - 1;
slavePtr->size = Tk_ReqHeight(slavePtr->tkwin) +
slavePtr->padY + slavePtr->iPadY + slavePtr->doubleBw;
if (slavePtr->numRows > 1) {
slavePtr->binNextPtr = layoutPtr[rightEdge].binNextPtr;
layoutPtr[rightEdge].binNextPtr = slavePtr;
} else {
int size = slavePtr->size + layoutPtr[rightEdge].pad;
if (size > layoutPtr[rightEdge].minSize) {
layoutPtr[rightEdge].minSize = size;
}
}
}
break;
}
/*
* Step 3.
* Determine the minimum slot offsets going from left to right
* that would fit all of the slaves. This determines the minimum
*/
for (offset=slot=0; slot < gridCount; slot++) {
layoutPtr[slot].minOffset = layoutPtr[slot].minSize + offset;
for (slavePtr = layoutPtr[slot].binNextPtr; slavePtr != NULL;
slavePtr = slavePtr->binNextPtr) {
int span = (slotType == COLUMN) ? slavePtr->numCols : slavePtr->numRows;
int required = slavePtr->size + layoutPtr[slot - span].minOffset;
if (required > layoutPtr[slot].minOffset) {
layoutPtr[slot].minOffset = required;
}
}
offset = layoutPtr[slot].minOffset;
}
/*
* At this point, we know the minimum required size of the entire layout.
* It might be prudent to stop here if our "master" will resize itself
* to this size.
*/
requiredSize = offset;
if (maxOffset > offset) {
offset=maxOffset;
}
/*
* Step 4.
* Determine the minimum slot offsets going from right to left,
* bounding the pixel range of each slot boundary.
* Pre-fill all of the right offsets with the actual size of the table;
* they will be reduced as required.
*/
for (slot=0; slot < gridCount; slot++) {
layoutPtr[slot].maxOffset = offset;
}
for (slot=gridCount-1; slot > 0;) {
for (slavePtr = layoutPtr[slot].binNextPtr; slavePtr != NULL;
slavePtr = slavePtr->binNextPtr) {
int span = (slotType == COLUMN) ? slavePtr->numCols : slavePtr->numRows;
int require = offset - slavePtr->size;
int startSlot = slot - span;
if (startSlot >=0 && require < layoutPtr[startSlot].maxOffset) {
layoutPtr[startSlot].maxOffset = require;
}
}
offset -= layoutPtr[slot].minSize;
slot--;
if (layoutPtr[slot].maxOffset < offset) {
offset = layoutPtr[slot].maxOffset;
} else {
layoutPtr[slot].maxOffset = offset;
}
}
/*
* Step 5.
* At this point, each slot boundary has a range of values that
* will satisfy the overall layout size.
* Make repeated passes over the layout structure looking for
* spans of slot boundaries where the minOffsets are less than
* the maxOffsets, and adjust the offsets according to the slot
* weights. At each pass, at least one slot boundary will have
* its range of possible values fixed at a single value.
*/
for (start=0; start < gridCount;) {
int totalWeight = 0; /* Sum of the weights for all of the
* slots in this span. */
int need = 0; /* The minimum space needed to layout
* this span. */
int have; /* The actual amount of space that will
* be taken up by this span. */
int weight; /* Cumulative weights of the columns in
* this span. */
int noWeights = 0; /* True if the span has no weights. */
/*
* Find a span by identifying ranges of slots whose edges are
* already constrained at fixed offsets, but whose internal
* slot boundaries have a range of possible positions.
*/
if (layoutPtr[start].minOffset == layoutPtr[start].maxOffset) {
start++;
continue;
}
for (end=start+1; end<gridCount; end++) {
if (layoutPtr[end].minOffset == layoutPtr[end].maxOffset) {
break;
}
}
/*
* We found a span. Compute the total weight, minumum space required,
* for this span, and the actual amount of space the span should
* use.
*/
for (slot=start; slot<=end; slot++) {
totalWeight += layoutPtr[slot].weight;
need += layoutPtr[slot].minSize;
}
have = layoutPtr[end].maxOffset - layoutPtr[start-1].minOffset;
/*
* If all the weights in the span are zero, then distribute the
* extra space evenly.
*/
if (totalWeight == 0) {
noWeights++;
totalWeight = end - start + 1;
}
/*
* It might not be possible to give the span all of the space
* available on this pass without violating the size constraints
* of one or more of the internal slot boundaries.
* Determine the maximum amount of space that when added to the
* entire span, would cause a slot boundary to have its possible
* range reduced to one value, and reduce the amount of extra
* space allocated on this pass accordingly.
*
* The calculation is done cumulatively to avoid accumulating
* roundoff errors.
*/
for (weight=0,slot=start; slot<end; slot++) {
int diff = layoutPtr[slot].maxOffset - layoutPtr[slot].minOffset;
weight += noWeights ? 1 : layoutPtr[slot].weight;
if ((noWeights || layoutPtr[slot].weight>0) &&
(diff*totalWeight/weight) < (have-need)) {
have = diff * totalWeight / weight + need;
}
}
/*
* Now distribute the extra space among the slots by
* adjusting the minSizes and minOffsets.
*/
for (weight=0,slot=start; slot<end; slot++) {
weight += noWeights ? 1 : layoutPtr[slot].weight;
layoutPtr[slot].minOffset +=
(int)((double) (have-need) * weight/totalWeight + 0.5);
layoutPtr[slot].minSize = layoutPtr[slot].minOffset
- layoutPtr[slot-1].minOffset;
}
layoutPtr[slot].minSize = layoutPtr[slot].minOffset
- layoutPtr[slot-1].minOffset;
/*
* Having pushed the top/left boundaries of the slots to
* take up extra space, the bottom/right space is recalculated
* to propagate the new space allocation.
*/
for (slot=end; slot > start; slot--) {
layoutPtr[slot-1].maxOffset =
layoutPtr[slot].maxOffset-layoutPtr[slot].minSize;
}
}
/*
* Step 6.
* All of the space has been apportioned; copy the
* layout information back into the master.
*/
for (slot=0; slot < gridCount; slot++) {
slotPtr[slot].offset = layoutPtr[slot].minOffset;
}
--layoutPtr;
if (layoutPtr != layoutData) {
Tcl_Free((char *)layoutPtr);
}
return requiredSize;
}
/*
*--------------------------------------------------------------
*
* GetGrid --
*
* This internal procedure is used to locate a Grid
* structure for a given window, creating one if one
* doesn't exist already.
*
* Results:
* The return value is a pointer to the Grid structure
* corresponding to tkwin.
*
* Side effects:
* A new grid structure may be created. If so, then
* a callback is set up to clean things up when the
* window is deleted.
*
*--------------------------------------------------------------
*/
static Gridder *
GetGrid(tkwin)
Tk_Window tkwin; /* Token for window for which
* grid structure is desired. */
{
register Gridder *gridPtr;
Tcl_HashEntry *hPtr;
int new;
if (!initialized) {
initialized = 1;
Tcl_InitHashTable(&gridHashTable, TCL_ONE_WORD_KEYS);
}
/*
* See if there's already grid for this window. If not,
* then create a new one.
*/
hPtr = Tcl_CreateHashEntry(&gridHashTable, (char *) tkwin, &new);
if (!new) {
return (Gridder *) Tcl_GetHashValue(hPtr);
}
gridPtr = (Gridder *) Tcl_Alloc(sizeof(Gridder));
gridPtr->tkwin = tkwin;
gridPtr->masterPtr = NULL;
gridPtr->masterDataPtr = NULL;
gridPtr->nextPtr = NULL;
gridPtr->slavePtr = NULL;
gridPtr->binNextPtr = NULL;
gridPtr->column = gridPtr->row = -1;
gridPtr->numCols = 1;
gridPtr->numRows = 1;
gridPtr->padX = gridPtr->padY = 0;
gridPtr->iPadX = gridPtr->iPadY = 0;
gridPtr->doubleBw = 2*Tk_Changes(tkwin)->border_width;
gridPtr->abortPtr = NULL;
gridPtr->flags = 0;
gridPtr->sticky = 0;
gridPtr->size = 0;
gridPtr->masterDataPtr = NULL;
Tcl_SetHashValue(hPtr, gridPtr);
Tk_CreateEventHandler(tkwin, StructureNotifyMask,
GridStructureProc, (ClientData) gridPtr);
return gridPtr;
}
/*
*--------------------------------------------------------------
*
* SetGridSize --
*
* This internal procedure sets the size of the grid occupied
* by slaves.
*
* Results:
* none
*
* Side effects:
* The width and height arguments are filled in the master data structure.
* Additional space is allocated for the constraints to accomodate
* the offsets.
*
*--------------------------------------------------------------
*/
static void
SetGridSize(masterPtr)
Gridder *masterPtr; /* The geometry master for this grid. */
{
register Gridder *slavePtr; /* Current slave window. */
int maxX = 0, maxY = 0;
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
maxX = MAX(maxX,slavePtr->numCols + slavePtr->column);
maxY = MAX(maxY,slavePtr->numRows + slavePtr->row);
}
masterPtr->masterDataPtr->columnEnd = maxX;
masterPtr->masterDataPtr->rowEnd = maxY;
CheckSlotData(masterPtr, maxX, COLUMN, CHECK_SPACE);
CheckSlotData(masterPtr, maxY, ROW, CHECK_SPACE);
}
/*
*--------------------------------------------------------------
*
* CheckSlotData --
*
* This internal procedure is used to manage the storage for
* row and column (slot) constraints.
*
* Results:
* TRUE if the index is OK, False otherwise.
*
* Side effects:
* A new master grid structure may be created. If so, then
* it is initialized. In addition, additional storage for
* a row or column constraints may be allocated, and the constraint
* maximums are adjusted.
*
*--------------------------------------------------------------
*/
static int
CheckSlotData(masterPtr, slot, slotType, checkOnly)
Gridder *masterPtr; /* the geometry master for this grid */
int slot; /* which slot to look at */
int slotType; /* ROW or COLUMN */
int checkOnly; /* don't allocate new space if true */
{
int numSlot; /* number of slots already allocated (Space) */
int end; /* last used constraint */
/*
* If slot is out of bounds, return immediately.
*/
if (slot < 0 || slot >= MAX_ELEMENT) {
return TCL_ERROR;
}
if ((checkOnly == CHECK_ONLY) && (masterPtr->masterDataPtr == NULL)) {
return TCL_ERROR;
}
/*
* If we need to allocate more space, allocate a little extra to avoid
* repeated re-alloc's for large tables. We need enough space to
* hold all of the offsets as well.
*/
InitMasterData(masterPtr);
end = (slotType == ROW) ? masterPtr->masterDataPtr->rowMax :
masterPtr->masterDataPtr->columnMax;
if (checkOnly == CHECK_ONLY) {
return (end < slot) ? TCL_ERROR : TCL_OK;
} else {
numSlot = (slotType == ROW) ? masterPtr->masterDataPtr->rowSpace
: masterPtr->masterDataPtr->columnSpace;
if (slot >= numSlot) {
int newNumSlot = slot + PREALLOC ;
size_t oldSize = numSlot * sizeof(SlotInfo) ;
size_t newSize = newNumSlot * sizeof(SlotInfo) ;
SlotInfo *new = (SlotInfo *) Tcl_Alloc(newSize);
SlotInfo *old = (slotType == ROW) ?
masterPtr->masterDataPtr->rowPtr :
masterPtr->masterDataPtr->columnPtr;
memcpy((VOID *) new, (VOID *) old, oldSize );
memset((VOID *) (new+numSlot), 0, newSize - oldSize );
Tcl_Free((char *) old);
if (slotType == ROW) {
masterPtr->masterDataPtr->rowPtr = new ;
masterPtr->masterDataPtr->rowSpace = newNumSlot ;
} else {
masterPtr->masterDataPtr->columnPtr = new;
masterPtr->masterDataPtr->columnSpace = newNumSlot ;
}
}
if (slot >= end && checkOnly != CHECK_SPACE) {
if (slotType == ROW) {
masterPtr->masterDataPtr->rowMax = slot+1;
} else {
masterPtr->masterDataPtr->columnMax = slot+1;
}
}
return TCL_OK;
}
}
/*
*--------------------------------------------------------------
*
* InitMasterData --
*
* This internal procedure is used to allocate and initialize
* the data for a geometry master, if the data
* doesn't exist already.
*
* Results:
* none
*
* Side effects:
* A new master grid structure may be created. If so, then
* it is initialized.
*
*--------------------------------------------------------------
*/
static void
InitMasterData(masterPtr)
Gridder *masterPtr;
{
size_t size;
if (masterPtr->masterDataPtr == NULL) {
GridMaster *gridPtr = masterPtr->masterDataPtr =
(GridMaster *) Tcl_Alloc(sizeof(GridMaster));
size = sizeof(SlotInfo) * TYPICAL_SIZE;
gridPtr->columnEnd = 0;
gridPtr->columnMax = 0;
gridPtr->columnPtr = (SlotInfo *) Tcl_Alloc(size);
gridPtr->columnSpace = 0;
gridPtr->columnSpace = TYPICAL_SIZE;
gridPtr->rowEnd = 0;
gridPtr->rowMax = 0;
gridPtr->rowPtr = (SlotInfo *) Tcl_Alloc(size);
gridPtr->rowSpace = 0;
gridPtr->rowSpace = TYPICAL_SIZE;
memset((VOID *) gridPtr->columnPtr, 0, size);
memset((VOID *) gridPtr->rowPtr, 0, size);
}
}
/*
*----------------------------------------------------------------------
*
* Unlink --
*
* Remove a grid from its parent's list of slaves.
*
* Results:
* None.
*
* Side effects:
* The parent will be scheduled for re-arranging, and the size of the
* grid will be adjusted accordingly
*
*----------------------------------------------------------------------
*/
static void
Unlink(slavePtr)
register Gridder *slavePtr; /* Window to unlink. */
{
register Gridder *masterPtr, *slavePtr2;
GridMaster *gridPtr; /* pointer to grid data */
masterPtr = slavePtr->masterPtr;
if (masterPtr == NULL) {
return;
}
gridPtr = masterPtr->masterDataPtr;
if (masterPtr->slavePtr == slavePtr) {
masterPtr->slavePtr = slavePtr->nextPtr;
}
else {
for (slavePtr2 = masterPtr->slavePtr; ; slavePtr2 = slavePtr2->nextPtr) {
if (slavePtr2 == NULL) {
panic("Unlink couldn't find previous window");
}
if (slavePtr2->nextPtr == slavePtr) {
slavePtr2->nextPtr = slavePtr->nextPtr;
break;
}
}
}
if (!(masterPtr->flags & REQUESTED_RELAYOUT)) {
masterPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) masterPtr);
}
if (masterPtr->abortPtr != NULL) {
*masterPtr->abortPtr = 1;
}
if ((slavePtr->numCols+slavePtr->column == gridPtr->columnMax)
|| (slavePtr->numRows+slavePtr->row == gridPtr->rowMax)) {
}
slavePtr->masterPtr = NULL;
}
/*
*----------------------------------------------------------------------
*
* DestroyGrid --
*
* This procedure is invoked by Tk_EventuallyFree or Tcl_Release
* to clean up the internal structure of a grid at a safe time
* (when no-one is using it anymore). Cleaning up the grid involves
* freeing the main structure for all windows. and the master structure
* for geometry managers.
*
* Results:
* None.
*
* Side effects:
* Everything associated with the grid is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyGrid(memPtr)
char *memPtr; /* Info about window that is now dead. */
{
register Gridder *gridPtr = (Gridder *) memPtr;
if (gridPtr->masterDataPtr != NULL) {
if (gridPtr->masterDataPtr->rowPtr != NULL) {
Tcl_Free((char *) gridPtr->masterDataPtr -> rowPtr);
}
if (gridPtr->masterDataPtr->columnPtr != NULL) {
Tcl_Free((char *) gridPtr->masterDataPtr -> columnPtr);
}
Tcl_Free((char *) gridPtr->masterDataPtr);
}
Tcl_Free((char *) gridPtr);
}
/*
*----------------------------------------------------------------------
*
* GridStructureProc --
*
* 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 grid-related
* information. If it was just resized, re-configure its slaves, if
* any.
*
*----------------------------------------------------------------------
*/
static void
GridStructureProc(clientData, eventPtr)
ClientData clientData; /* Our information about window
* referred to by eventPtr. */
XEvent *eventPtr; /* Describes what just happened. */
{
register Gridder *gridPtr = (Gridder *) clientData;
if (eventPtr->type == ConfigureNotify) {
if (!(gridPtr->flags & REQUESTED_RELAYOUT)) {
gridPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) gridPtr);
}
if (gridPtr->doubleBw != 2*Tk_Changes(gridPtr->tkwin)->border_width) {
if ((gridPtr->masterPtr != NULL) &&
!(gridPtr->masterPtr->flags & REQUESTED_RELAYOUT)) {
gridPtr->doubleBw = 2*Tk_Changes(gridPtr->tkwin)->border_width;
gridPtr->masterPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) gridPtr->masterPtr);
}
}
} else if (eventPtr->type == DestroyNotify) {
register Gridder *gridPtr2, *nextPtr;
if (gridPtr->masterPtr != NULL) {
Unlink(gridPtr);
}
for (gridPtr2 = gridPtr->slavePtr; gridPtr2 != NULL;
gridPtr2 = nextPtr) {
Tk_UnmapWindow(gridPtr2->tkwin);
gridPtr2->masterPtr = NULL;
nextPtr = gridPtr2->nextPtr;
gridPtr2->nextPtr = NULL;
}
Tcl_DeleteHashEntry(Tcl_FindHashEntry(&gridHashTable,
(char *) gridPtr->tkwin));
if (gridPtr->flags & REQUESTED_RELAYOUT) {
Tk_CancelIdleCall(ArrangeGrid, (ClientData) gridPtr);
}
gridPtr->tkwin = NULL;
Tk_EventuallyFree((ClientData) gridPtr, DestroyGrid);
} else if (eventPtr->type == MapNotify) {
if (!(gridPtr->flags & REQUESTED_RELAYOUT)) {
gridPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) gridPtr);
}
} else if (eventPtr->type == UnmapNotify) {
register Gridder *gridPtr2;
for (gridPtr2 = gridPtr->slavePtr; gridPtr2 != NULL;
gridPtr2 = gridPtr2->nextPtr) {
Tk_UnmapWindow(gridPtr2->tkwin);
}
}
}
/*
*----------------------------------------------------------------------
*
* ConfigureSlaves --
*
* This implements the guts of the "grid configure" command. Given
* a list of slaves and configuration options, it arranges for the
* grid to manage the slaves and sets the specified options.
* arguments consist of windows or window shortcuts followed by
* "-option value" pairs.
*
* Results:
* TCL_OK is returned if all went well. Otherwise, TCL_ERROR is
* returned and interp->result is set to contain an error message.
*
* Side effects:
* Slave windows get taken over by the grid.
*
*----------------------------------------------------------------------
*/
static int
ConfigureSlaves(interp, tkwin, argc, argv)
Tcl_Interp *interp; /* Interpreter for error reporting. */
Tk_Window tkwin; /* Any window in application containing
* slaves. Used to look up slave names. */
int argc; /* Number of elements in argv. */
char *argv[]; /* Argument strings: 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. */
{
Gridder *masterPtr;
Gridder *slavePtr;
Tk_Window other, slave, parent, ancestor;
int i, j, c, tmp;
size_t length;
int numWindows;
int width;
int defaultColumn = 0; /* default column number */
int defaultColumnSpan = 1; /* default number of columns */
char *lastWindow; /* use this window to base current
* Row/col on */
/*
* Count the number of windows, or window short-cuts.
*/
for(numWindows=i=0;i<argc;i++) {
char firstChar = *argv[i];
if (firstChar == '.') {
numWindows++;
continue;
}
length = strlen(argv[i]);
if (length > 1 && firstChar == '-') {
break;
}
if (length > 1) {
Tcl_AppendResult(interp, "unexpected parameter, \"",
argv[i], "\", in configure list. ",
"Should be window name or option", (char *) NULL);
return TCL_ERROR;
}
if ((firstChar == REL_HORIZ) && ((numWindows == 0) ||
(*argv[i-1] == REL_SKIP) || (*argv[i-1] == REL_VERT))) {
Tcl_AppendResult(interp,
"Must specify window before shortcut '-'.",
(char *) NULL);
return TCL_ERROR;
}
if ((firstChar == REL_VERT) || (firstChar == REL_SKIP)
|| (firstChar == REL_HORIZ)) {
continue;
}
Tcl_AppendResult(interp, "invalid window shortcut, \"",
argv[i], "\" should be '-', 'x', or '^'", (char *) NULL);
return TCL_ERROR;
}
numWindows = i;
if ((argc-numWindows)&1) {
Tcl_AppendResult(interp, "extra option or",
" option with no value", (char *) NULL);
return TCL_ERROR;
}
/*
* Iterate over all of the slave windows and short-cuts, parsing
* 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 managed we want to just change a few
* existing values without resetting everything. If there are
* multiple windows, the -in option only gets processed for the
* first window.
*/
masterPtr = NULL;
for (j = 0; j < numWindows; j++) {
char firstChar = *argv[j];
/*
* '^' and 'x' cause us to skip a column. '-' is processed
* as part of its preceeding slave.
*/
if ((firstChar == REL_VERT) || (firstChar == REL_SKIP)) {
defaultColumn++;
continue;
}
if (firstChar == REL_HORIZ) {
continue;
}
for (defaultColumnSpan=1;
j + defaultColumnSpan < numWindows &&
(*argv[j+defaultColumnSpan] == REL_HORIZ);
defaultColumnSpan++) {
/* null body */
}
slave = Tk_NameToWindow(interp, argv[j], tkwin);
if (slave == NULL) {
return TCL_ERROR;
}
if (Tk_IsTopLevel(slave)) {
Tcl_AppendResult(interp, "can't manage \"", argv[j],
"\": it's a top-level window", (char *) NULL);
return TCL_ERROR;
}
slavePtr = GetGrid(slave);
/*
* The following statement is taken from tkPack.c:
*
* "If the slave isn't currently managed, reset all of its
* configuration information to default values (there could
* be old values left from a previous packer)."
*
* I [D.S.] disagree with this statement. If a slave is disabled (using
* "forget") and then re-enabled, I submit that 90% of the time the
* programmer will want it to retain its old configuration information.
* If the programmer doesn't want this behavior, then the
* defaults can be reestablished by hand, without having to worry
* about keeping track of the old state.
*/
for (i = numWindows; i < argc; i+=2) {
length = strlen(argv[i]);
c = argv[i][1];
if (length < 2) {
Tcl_AppendResult(interp, "unknown or ambiguous option \"",
argv[i], "\": must be ",
"-column, -columnspan, -in, -ipadx, -ipady, ",
"-padx, -pady, -row, -rowspan, or -sticky",
(char *) NULL);
return TCL_ERROR;
}
if ((c == 'c') && (strncmp(argv[i], "-column", length) == 0)) {
if (Tcl_GetInt(interp, argv[i+1], &tmp) != TCL_OK || tmp<0) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad column value \"", argv[i+1],
"\": must be a non-negative integer", (char *)NULL);
return TCL_ERROR;
}
slavePtr->column = tmp;
} else if ((c == 'c')
&& (strncmp(argv[i], "-columnspan", length) == 0)) {
if (Tcl_GetInt(interp, argv[i+1], &tmp) != TCL_OK || tmp <= 0) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad columnspan value \"", argv[i+1],
"\": must be a positive integer", (char *)NULL);
return TCL_ERROR;
}
slavePtr->numCols = tmp;
} else if ((c == 'i') && (strncmp(argv[i], "-in", length) == 0)) {
other = Tk_NameToWindow(interp, argv[i+1], tkwin);
if (other == NULL) {
return TCL_ERROR;
}
if (other == slave) {
sprintf(interp->result,"Window can't be managed in itself");
return TCL_ERROR;
}
masterPtr = GetGrid(other);
InitMasterData(masterPtr);
} else if ((c == 'i')
&& (strncmp(argv[i], "-ipadx", length) == 0)) {
if ((Tk_GetPixels(interp, slave, argv[i+1], &tmp) != TCL_OK)
|| (tmp < 0)) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad ipadx value \"", argv[i+1],
"\": must be positive screen distance",
(char *) NULL);
return TCL_ERROR;
}
slavePtr->iPadX = tmp*2;
} else if ((c == 'i')
&& (strncmp(argv[i], "-ipady", length) == 0)) {
if ((Tk_GetPixels(interp, slave, argv[i+1], &tmp) != TCL_OK)
|| (tmp< 0)) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad ipady value \"", argv[i+1],
"\": must be positive screen distance",
(char *) NULL);
return TCL_ERROR;
}
slavePtr->iPadY = tmp*2;
} else if ((c == 'p')
&& (strncmp(argv[i], "-padx", length) == 0)) {
if ((Tk_GetPixels(interp, slave, argv[i+1], &tmp) != TCL_OK)
|| (tmp< 0)) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad padx value \"", argv[i+1],
"\": must be positive screen distance",
(char *) NULL);
return TCL_ERROR;
}
slavePtr->padX = tmp*2;
} else if ((c == 'p')
&& (strncmp(argv[i], "-pady", length) == 0)) {
if ((Tk_GetPixels(interp, slave, argv[i+1], &tmp) != TCL_OK)
|| (tmp< 0)) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad pady value \"", argv[i+1],
"\": must be positive screen distance",
(char *) NULL);
return TCL_ERROR;
}
slavePtr->padY = tmp*2;
} else if ((c == 'r') && (strncmp(argv[i], "-row", length) == 0)) {
if (Tcl_GetInt(interp, argv[i+1], &tmp) != TCL_OK || tmp<0) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad grid value \"", argv[i+1],
"\": must be a non-negative integer", (char *)NULL);
return TCL_ERROR;
}
slavePtr->row = tmp;
} else if ((c == 'r')
&& (strncmp(argv[i], "-rowspan", length) == 0)) {
if ((Tcl_GetInt(interp, argv[i+1], &tmp) != TCL_OK) || tmp<=0) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "bad rowspan value \"", argv[i+1],
"\": must be a positive integer", (char *)NULL);
return TCL_ERROR;
}
slavePtr->numRows = tmp;
} else if ((c == 's')
&& strncmp(argv[i], "-sticky", length) == 0) {
int sticky = StringToSticky(argv[i+1]);
if (sticky == -1) {
Tcl_AppendResult(interp, "bad stickyness value \"", argv[i+1],
"\": must be a string containing n, e, s, and/or w",
(char *)NULL);
return TCL_ERROR;
}
slavePtr->sticky = sticky;
} else {
Tcl_AppendResult(interp, "unknown or ambiguous option \"",
argv[i], "\": must be ",
"-column, -columnspan, -in, -ipadx, -ipady, ",
"-padx, -pady, -row, -rowspan, or -sticky",
(char *) NULL);
return TCL_ERROR;
}
}
/*
* Make sure we have a geometry master. We look at:
* 1) the -in flag
* 2) the geometry master of the first slave (if specified)
* 3) the parent of the first slave.
*/
if (masterPtr == NULL) {
masterPtr = slavePtr->masterPtr;
}
parent = Tk_Parent(slave);
if (masterPtr == NULL) {
masterPtr = GetGrid(parent);
InitMasterData(masterPtr);
}
if (slavePtr->masterPtr != NULL && slavePtr->masterPtr != masterPtr) {
Unlink(slavePtr);
slavePtr->masterPtr = NULL;
}
if (slavePtr->masterPtr == NULL) {
Gridder *tempPtr = masterPtr->slavePtr;
slavePtr->masterPtr = masterPtr;
masterPtr->slavePtr = slavePtr;
slavePtr->nextPtr = tempPtr;
}
/*
* 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.
*/
for (ancestor = masterPtr->tkwin; ; ancestor = Tk_Parent(ancestor)) {
if (ancestor == parent) {
break;
}
if (Tk_IsTopLevel(ancestor)) {
Tcl_AppendResult(interp, "can't put ", argv[j],
" inside ", Tk_PathName(masterPtr->tkwin),
(char *) NULL);
Unlink(slavePtr);
return TCL_ERROR;
}
}
/*
* Try to make sure our master isn't managed by us.
*/
if (masterPtr->masterPtr == slavePtr) {
Tcl_AppendResult(interp, "can't put ", argv[j],
" inside ", Tk_PathName(masterPtr->tkwin),
", would cause management loop.",
(char *) NULL);
Unlink(slavePtr);
return TCL_ERROR;
}
Tk_ManageGeometry(slave, &gridMgrType, (ClientData) slavePtr);
/*
* Assign default position information.
*/
if (slavePtr->column == -1) {
slavePtr->column = defaultColumn;
}
slavePtr->numCols += defaultColumnSpan - 1;
if (slavePtr->row == -1) {
if (masterPtr->masterDataPtr == NULL) {
slavePtr->row = 0;
} else {
slavePtr->row = masterPtr->masterDataPtr->rowEnd;
}
}
defaultColumn += slavePtr->numCols;
defaultColumnSpan = 1;
/*
* Arrange for the parent to be re-arranged at the first
* idle moment.
*/
if (masterPtr->abortPtr != NULL) {
*masterPtr->abortPtr = 1;
}
if (!(masterPtr->flags & REQUESTED_RELAYOUT)) {
masterPtr->flags |= REQUESTED_RELAYOUT;
Tcl_DoWhenIdle(ArrangeGrid, (ClientData) masterPtr);
}
}
/* Now look for all the "^"'s. */
lastWindow = NULL;
for (j = 0; j < numWindows; j++) {
struct Gridder *otherPtr;
int match; /* found a match for the ^ */
int lastRow, lastColumn; /* implied end of table */
if (*argv[j] == '.') {
lastWindow = argv[j];
}
if (*argv[j] != REL_VERT) {
continue;
}
if (masterPtr == NULL) {
Tcl_AppendResult(interp, "can't use '^', cant find master",
(char *) NULL);
return TCL_ERROR;
}
for (width=1; width+j < numWindows && *argv[j+width] == REL_VERT;
width++) {
/* Null Body */
}
/*
* Find the implied grid location of the ^
*/
if (lastWindow == NULL) {
if (masterPtr->masterDataPtr != NULL) {
SetGridSize(masterPtr);
lastRow = masterPtr->masterDataPtr->rowEnd - 1;
} else {
lastRow = 0;
}
lastColumn = 0;
} else {
other = Tk_NameToWindow(interp, lastWindow, tkwin);
otherPtr = GetGrid(other);
lastRow = otherPtr->row;
lastColumn = otherPtr->column + otherPtr->numCols;
}
for (match=0, slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
if (slavePtr->numCols == width
&& slavePtr->column == lastColumn
&& slavePtr->row + slavePtr->numRows == lastRow) {
slavePtr->numRows++;
match++;
}
lastWindow = Tk_PathName(slavePtr->tkwin);
}
if (!match) {
Tcl_AppendResult(interp, "can't find slave to extend with \"^\".",
(char *) NULL);
return TCL_ERROR;
}
j += width - 1;
}
if (masterPtr == NULL) {
Tcl_AppendResult(interp, "can't determine master window",
(char *) NULL);
return TCL_ERROR;
}
SetGridSize(masterPtr);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StickyToString
*
* Converts the internal boolean combination of "sticky" bits onto
* a TCL list element containing zero or mor of n, s, e, or w.
*
* Results:
* A string is placed into the "result" pointer.
*
* Side effects:
* none.
*
*----------------------------------------------------------------------
*/
static void
StickyToString(flags, result)
int flags; /* the sticky flags */
char *result; /* where to put the result */
{
int count = 0;
#ifdef SCM_CODE
result[count++]='"';
#endif
if (flags&STICK_NORTH) {
result[count++] = 'n';
}
if (flags&STICK_EAST) {
result[count++] = 'e';
}
if (flags&STICK_SOUTH) {
result[count++] = 's';
}
if (flags&STICK_WEST) {
result[count++] = 'w';
}
#ifdef SCM_CODE
result[count++]= '"';
result[count] = '\0';
#else
if (count) {
result[count] = '\0';
} else {
sprintf(result,"{}");
}
#endif
}
/*
*----------------------------------------------------------------------
*
* StringToSticky --
*
* Converts an ascii string representing a widgets stickyness
* into the boolean result.
*
* Results:
* The boolean combination of the "sticky" bits is retuned. If an
* error occurs, such as an invalid character, -1 is returned instead.
*
* Side effects:
* none
*
*----------------------------------------------------------------------
*/
static int
StringToSticky(string)
char *string;
{
int sticky = 0;
char c;
while ((c = *string++) != '\0') {
switch (c) {
case 'n': case 'N': sticky |= STICK_NORTH; break;
case 'e': case 'E': sticky |= STICK_EAST; break;
case 's': case 'S': sticky |= STICK_SOUTH; break;
case 'w': case 'W': sticky |= STICK_WEST; break;
case ' ': case ',': case '\t': case '\r': case '\n': break;
default: return -1;
}
}
return sticky;
}
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