/*
* tkPlace.c --
*
* This file contains code to implement a simple geometry manager
* for Tk based on absolute placement or "rubber-sheet" placement.
*
* Copyright (c) 1992-1994 The Regents of the University of California.
* Copyright (c) 1994-1995 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
static char sccsid[] = "%Z% %M% %I% %E% %U%";
#include "tkPort.h"
#include "tkInt.h"
/*
* Border modes for relative placement:
*
* BM_INSIDE: relative distances computed using area inside
* all borders of master window.
* BM_OUTSIDE: relative distances computed using outside area
* that includes all borders of master.
* BM_IGNORE: border issues are ignored: place relative to
* master's actual window size.
*/
typedef enum {BM_INSIDE, BM_OUTSIDE, BM_IGNORE} BorderMode;
/*
* For each window whose geometry is managed by the placer there is
* a structure of the following type:
*/
typedef struct Slave {
Tk_Window tkwin; /* Tk's token for window. */
struct Master *masterPtr; /* Pointer to information for window
* relative to which tkwin is placed.
* This isn't necessarily the logical
* parent of tkwin. NULL means the
* master was deleted or never assigned. */
struct Slave *nextPtr; /* Next in list of windows placed relative
* to same master (NULL for end of list). */
/*
* Geometry information for window; where there are both relative
* and absolute values for the same attribute (e.g. x and relX) only
* one of them is actually used, depending on flags.
*/
int x, y; /* X and Y pixel coordinates for tkwin. */
float relX, relY; /* X and Y coordinates relative to size of
* master. */
int width, height; /* Absolute dimensions for tkwin. */
float relWidth, relHeight; /* Dimensions for tkwin relative to size of
* master. */
Tk_Anchor anchor; /* Which point on tkwin is placed at the
* given position. */
BorderMode borderMode; /* How to treat borders of master window. */
int flags; /* Various flags; see below for bit
* definitions. */
} Slave;
/*
* Flag definitions for Slave structures:
*
* CHILD_WIDTH - 1 means -width was specified;
* CHILD_REL_WIDTH - 1 means -relwidth was specified.
* CHILD_HEIGHT - 1 means -height was specified;
* CHILD_REL_HEIGHT - 1 means -relheight was specified.
*/
#define CHILD_WIDTH 1
#define CHILD_REL_WIDTH 2
#define CHILD_HEIGHT 4
#define CHILD_REL_HEIGHT 8
/*
* For each master window that has a slave managed by the placer there
* is a structure of the following form:
*/
typedef struct Master {
Tk_Window tkwin; /* Tk's token for master window. */
struct Slave *slavePtr; /* First in linked list of slaves
* placed relative to this master. */
int flags; /* See below for bit definitions. */
} Master;
/*
* Flag definitions for masters:
*
* PARENT_RECONFIG_PENDING - 1 means that a call to RecomputePlacement
* is already pending via a Do_When_Idle handler.
*/
#define PARENT_RECONFIG_PENDING 1
/*
* The hash tables below both use Tk_Window tokens as keys. They map
* from Tk_Windows to Slave and Master structures for windows, if they
* exist.
*/
static int initialized = 0;
static Tcl_HashTable masterTable;
static Tcl_HashTable slaveTable;
/*
* The following structure is the official type record for the
* placer:
*/
static void PlaceRequestProc _ANSI_ARGS_((ClientData clientData,
Tk_Window tkwin));
static void PlaceLostSlaveProc _ANSI_ARGS_((ClientData clientData,
Tk_Window tkwin));
static Tk_GeomMgr placerType = {
"place", /* name */
PlaceRequestProc, /* requestProc */
PlaceLostSlaveProc, /* lostSlaveProc */
};
/*
* Forward declarations for procedures defined later in this file:
*/
static void SlaveStructureProc _ANSI_ARGS_((ClientData clientData,
XEvent *eventPtr));
static int ConfigureSlave _ANSI_ARGS_((Tcl_Interp *interp,
Slave *slavePtr, int argc, char **argv));
static Slave * FindSlave _ANSI_ARGS_((Tk_Window tkwin));
static Master * FindMaster _ANSI_ARGS_((Tk_Window tkwin));
static void MasterStructureProc _ANSI_ARGS_((ClientData clientData,
XEvent *eventPtr));
static void RecomputePlacement _ANSI_ARGS_((ClientData clientData));
static void UnlinkSlave _ANSI_ARGS_((Slave *slavePtr));
/*
*--------------------------------------------------------------
*
* Tk_PlaceCmd --
*
* This procedure is invoked to process the "place" Tcl
* commands. See the user documentation for details on
* what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
int
Tk_PlaceCmd(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;
Slave *slavePtr;
Tcl_HashEntry *hPtr;
size_t length;
int c;
/*
* Initialize, if that hasn't been done yet.
*/
if (!initialized) {
Tcl_InitHashTable(&masterTable, TCL_ONE_WORD_KEYS);
Tcl_InitHashTable(&slaveTable, TCL_ONE_WORD_KEYS);
initialized = 1;
}
if (argc < 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " option|pathName args", (char *) NULL);
return TCL_ERROR;
}
c = argv[1][0];
length = strlen(argv[1]);
/*
* Handle special shortcut where window name is first argument.
*/
if (c == '.') {
tkwin = Tk_NameToWindow(interp, argv[1], (Tk_Window) clientData);
if (tkwin == NULL) {
return TCL_ERROR;
}
slavePtr = FindSlave(tkwin);
return ConfigureSlave(interp, slavePtr, argc-2, argv+2);
}
/*
* Handle more general case of option followed by window name followed
* by possible additional arguments.
*/
tkwin = Tk_NameToWindow(interp, argv[2], (Tk_Window) clientData);
if (tkwin == NULL) {
return TCL_ERROR;
}
if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)) {
if (argc < 5) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0],
" configure pathName option value ?option value ...?\"",
(char *) NULL);
return TCL_ERROR;
}
slavePtr = FindSlave(tkwin);
return ConfigureSlave(interp, slavePtr, argc-3, argv+3);
} else if ((c == 'f') && (strncmp(argv[1], "forget", length) == 0)) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " forget pathName\"", (char *) NULL);
return TCL_ERROR;
}
hPtr = Tcl_FindHashEntry(&slaveTable, (char *) tkwin);
if (hPtr == NULL) {
return TCL_OK;
}
slavePtr = (Slave *) Tcl_GetHashValue(hPtr);
if ((slavePtr->masterPtr != NULL) &&
(slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin))) {
Tk_UnmaintainGeometry(slavePtr->tkwin,
slavePtr->masterPtr->tkwin);
}
UnlinkSlave(slavePtr);
Tcl_DeleteHashEntry(hPtr);
Tk_DeleteEventHandler(tkwin, StructureNotifyMask, SlaveStructureProc,
(ClientData) slavePtr);
Tk_ManageGeometry(tkwin, (Tk_GeomMgr *) NULL, (ClientData) NULL);
Tk_UnmapWindow(tkwin);
ckfree((char *) slavePtr);
} else if ((c == 'i') && (strncmp(argv[1], "info", length) == 0)) {
char buffer[50];
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " info pathName\"", (char *) NULL);
return TCL_ERROR;
}
hPtr = Tcl_FindHashEntry(&slaveTable, (char *) tkwin);
if (hPtr == NULL) {
return TCL_OK;
}
slavePtr = (Slave *) Tcl_GetHashValue(hPtr);
sprintf(buffer, "-x %d", slavePtr->x);
Tcl_AppendResult(interp, buffer, (char *) NULL);
sprintf(buffer, " -relx %.4g", slavePtr->relX);
Tcl_AppendResult(interp, buffer, (char *) NULL);
sprintf(buffer, " -y %d", slavePtr->y);
Tcl_AppendResult(interp, buffer, (char *) NULL);
sprintf(buffer, " -rely %.4g", slavePtr->relY);
Tcl_AppendResult(interp, buffer, (char *) NULL);
if (slavePtr->flags & CHILD_WIDTH) {
sprintf(buffer, " -width %d", slavePtr->width);
Tcl_AppendResult(interp, buffer, (char *) NULL);
} else {
Tcl_AppendResult(interp, " -width {}", (char *) NULL);
}
if (slavePtr->flags & CHILD_REL_WIDTH) {
sprintf(buffer, " -relwidth %.4g", slavePtr->relWidth);
Tcl_AppendResult(interp, buffer, (char *) NULL);
} else {
Tcl_AppendResult(interp, " -relwidth {}", (char *) NULL);
}
if (slavePtr->flags & CHILD_HEIGHT) {
sprintf(buffer, " -height %d", slavePtr->height);
Tcl_AppendResult(interp, buffer, (char *) NULL);
} else {
Tcl_AppendResult(interp, " -height {}", (char *) NULL);
}
if (slavePtr->flags & CHILD_REL_HEIGHT) {
sprintf(buffer, " -relheight %.4g", slavePtr->relHeight);
Tcl_AppendResult(interp, buffer, (char *) NULL);
} else {
Tcl_AppendResult(interp, " -relheight {}", (char *) NULL);
}
Tcl_AppendResult(interp, " -anchor ", Tk_NameOfAnchor(slavePtr->anchor),
(char *) NULL);
if (slavePtr->borderMode == BM_OUTSIDE) {
Tcl_AppendResult(interp, " -bordermode outside", (char *) NULL);
} else if (slavePtr->borderMode == BM_IGNORE) {
Tcl_AppendResult(interp, " -bordermode ignore", (char *) NULL);
}
if ((slavePtr->masterPtr != NULL)
&& (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin))) {
Tcl_AppendResult(interp, " -in ",
Tk_PathName(slavePtr->masterPtr->tkwin), (char *) NULL);
}
} else if ((c == 's') && (strncmp(argv[1], "slaves", length) == 0)) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " slaves pathName\"", (char *) NULL);
return TCL_ERROR;
}
hPtr = Tcl_FindHashEntry(&masterTable, (char *) tkwin);
if (hPtr != NULL) {
Master *masterPtr;
masterPtr = (Master *) Tcl_GetHashValue(hPtr);
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
Tcl_AppendElement(interp, Tk_PathName(slavePtr->tkwin));
}
}
} else {
Tcl_AppendResult(interp, "unknown or ambiguous option \"", argv[1],
"\": must be configure, forget, info, or slaves",
(char *) NULL);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* FindSlave --
*
* Given a Tk_Window token, find the Slave structure corresponding
* to that token (making a new one if necessary).
*
* Results:
* None.
*
* Side effects:
* A new Slave structure may be created.
*
*----------------------------------------------------------------------
*/
static Slave *
FindSlave(tkwin)
Tk_Window tkwin; /* Token for desired slave. */
{
Tcl_HashEntry *hPtr;
register Slave *slavePtr;
int new;
hPtr = Tcl_CreateHashEntry(&slaveTable, (char *) tkwin, &new);
if (new) {
slavePtr = (Slave *) ckalloc(sizeof(Slave));
slavePtr->tkwin = tkwin;
slavePtr->masterPtr = NULL;
slavePtr->nextPtr = NULL;
slavePtr->x = slavePtr->y = 0;
slavePtr->relX = slavePtr->relY = 0.0;
slavePtr->width = slavePtr->height = 0;
slavePtr->relWidth = slavePtr->relHeight = 0.0;
slavePtr->anchor = TK_ANCHOR_NW;
slavePtr->borderMode = BM_INSIDE;
slavePtr->flags = 0;
Tcl_SetHashValue(hPtr, slavePtr);
Tk_CreateEventHandler(tkwin, StructureNotifyMask, SlaveStructureProc,
(ClientData) slavePtr);
Tk_ManageGeometry(tkwin, &placerType, (ClientData) slavePtr);
} else {
slavePtr = (Slave *) Tcl_GetHashValue(hPtr);
}
return slavePtr;
}
/*
*----------------------------------------------------------------------
*
* UnlinkSlave --
*
* This procedure removes a slave window from the chain of slaves
* in its master.
*
* Results:
* None.
*
* Side effects:
* The slave list of slavePtr's master changes.
*
*----------------------------------------------------------------------
*/
static void
UnlinkSlave(slavePtr)
Slave *slavePtr; /* Slave structure to be unlinked. */
{
register Master *masterPtr;
register Slave *prevPtr;
masterPtr = slavePtr->masterPtr;
if (masterPtr == NULL) {
return;
}
if (masterPtr->slavePtr == slavePtr) {
masterPtr->slavePtr = slavePtr->nextPtr;
} else {
for (prevPtr = masterPtr->slavePtr; ;
prevPtr = prevPtr->nextPtr) {
if (prevPtr == NULL) {
panic("UnlinkSlave couldn't find slave to unlink");
}
if (prevPtr->nextPtr == slavePtr) {
prevPtr->nextPtr = slavePtr->nextPtr;
break;
}
}
}
slavePtr->masterPtr = NULL;
}
/*
*----------------------------------------------------------------------
*
* FindMaster --
*
* Given a Tk_Window token, find the Master structure corresponding
* to that token (making a new one if necessary).
*
* Results:
* None.
*
* Side effects:
* A new Master structure may be created.
*
*----------------------------------------------------------------------
*/
static Master *
FindMaster(tkwin)
Tk_Window tkwin; /* Token for desired master. */
{
Tcl_HashEntry *hPtr;
register Master *masterPtr;
int new;
hPtr = Tcl_CreateHashEntry(&masterTable, (char *) tkwin, &new);
if (new) {
masterPtr = (Master *) ckalloc(sizeof(Master));
masterPtr->tkwin = tkwin;
masterPtr->slavePtr = NULL;
masterPtr->flags = 0;
Tcl_SetHashValue(hPtr, masterPtr);
Tk_CreateEventHandler(masterPtr->tkwin, StructureNotifyMask,
MasterStructureProc, (ClientData) masterPtr);
} else {
masterPtr = (Master *) Tcl_GetHashValue(hPtr);
}
return masterPtr;
}
/*
*----------------------------------------------------------------------
*
* ConfigureSlave --
*
* This procedure is called to process an argv/argc list to
* reconfigure the placement of a window.
*
* Results:
* A standard Tcl result. If an error occurs then a message is
* left in interp->result.
*
* Side effects:
* Information in slavePtr may change, and slavePtr's master is
* scheduled for reconfiguration.
*
*----------------------------------------------------------------------
*/
static int
ConfigureSlave(interp, slavePtr, argc, argv)
Tcl_Interp *interp; /* Used for error reporting. */
Slave *slavePtr; /* Pointer to current information
* about slave. */
int argc; /* Number of config arguments. */
char **argv; /* String values for arguments. */
{
register Master *masterPtr;
int c, result;
size_t length;
double d;
result = TCL_OK;
for ( ; argc > 0; argc -= 2, argv += 2) {
if (argc < 2) {
Tcl_AppendResult(interp, "extra option \"", argv[0],
"\" (option with no value?)", (char *) NULL);
result = TCL_ERROR;
goto done;
}
length = strlen(argv[0]);
c = argv[0][1];
if ((c == 'a') && (strncmp(argv[0], "-anchor", length) == 0)) {
if (Tk_GetAnchor(interp, argv[1], &slavePtr->anchor) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
} else if ((c == 'b')
&& (strncmp(argv[0], "-bordermode", length) == 0)) {
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'i') && (strncmp(argv[1], "ignore", length) == 0)
&& (length >= 2)) {
slavePtr->borderMode = BM_IGNORE;
} else if ((c == 'i') && (strncmp(argv[1], "inside", length) == 0)
&& (length >= 2)) {
slavePtr->borderMode = BM_INSIDE;
} else if ((c == 'o')
&& (strncmp(argv[1], "outside", length) == 0)) {
slavePtr->borderMode = BM_OUTSIDE;
} else {
Tcl_AppendResult(interp, "bad border mode \"", argv[1],
"\": must be ignore, inside, or outside",
(char *) NULL);
result = TCL_ERROR;
goto done;
}
} else if ((c == 'h') && (strncmp(argv[0], "-height", length) == 0)) {
if (argv[1][0] == 0) {
slavePtr->flags &= ~CHILD_HEIGHT;
} else {
if (Tk_GetPixels(interp, slavePtr->tkwin, argv[1],
&slavePtr->height) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
slavePtr->flags |= CHILD_HEIGHT;
}
} else if ((c == 'i') && (strncmp(argv[0], "-in", length) == 0)) {
Tk_Window tkwin;
Tk_Window ancestor;
tkwin = Tk_NameToWindow(interp, argv[1], slavePtr->tkwin);
if (tkwin == NULL) {
result = TCL_ERROR;
goto done;
}
/*
* Make sure that the new master is either the logical parent
* of the slave or a descendant of that window, and that the
* master and slave aren't the same.
*/
for (ancestor = tkwin; ; ancestor = Tk_Parent(ancestor)) {
if (ancestor == Tk_Parent(slavePtr->tkwin)) {
break;
}
if (Tk_IsTopLevel(ancestor)) {
Tcl_AppendResult(interp, "can't place ",
Tk_PathName(slavePtr->tkwin), " relative to ",
Tk_PathName(tkwin), (char *) NULL);
result = TCL_ERROR;
goto done;
}
}
if (slavePtr->tkwin == tkwin) {
Tcl_AppendResult(interp, "can't place ",
Tk_PathName(slavePtr->tkwin), " relative to itself",
(char *) NULL);
result = TCL_ERROR;
goto done;
}
if ((slavePtr->masterPtr != NULL)
&& (slavePtr->masterPtr->tkwin == tkwin)) {
/*
* Re-using same old master. Nothing to do.
*/
} else {
if ((slavePtr->masterPtr != NULL)
&& (slavePtr->masterPtr->tkwin
!= Tk_Parent(slavePtr->tkwin))) {
Tk_UnmaintainGeometry(slavePtr->tkwin,
slavePtr->masterPtr->tkwin);
}
UnlinkSlave(slavePtr);
slavePtr->masterPtr = FindMaster(tkwin);
slavePtr->nextPtr = slavePtr->masterPtr->slavePtr;
slavePtr->masterPtr->slavePtr = slavePtr;
}
} else if ((c == 'r') && (strncmp(argv[0], "-relheight", length) == 0)
&& (length >= 5)) {
if (argv[1][0] == 0) {
slavePtr->flags &= ~CHILD_REL_HEIGHT;
} else {
if (Tcl_GetDouble(interp, argv[1], &d) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
slavePtr->relHeight = d;
slavePtr->flags |= CHILD_REL_HEIGHT;
}
} else if ((c == 'r') && (strncmp(argv[0], "-relwidth", length) == 0)
&& (length >= 5)) {
if (argv[1][0] == 0) {
slavePtr->flags &= ~CHILD_REL_WIDTH;
} else {
if (Tcl_GetDouble(interp, argv[1], &d) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
slavePtr->relWidth = d;
slavePtr->flags |= CHILD_REL_WIDTH;
}
} else if ((c == 'r') && (strncmp(argv[0], "-relx", length) == 0)
&& (length >= 5)) {
if (Tcl_GetDouble(interp, argv[1], &d) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
slavePtr->relX = d;
} else if ((c == 'r') && (strncmp(argv[0], "-rely", length) == 0)
&& (length >= 5)) {
if (Tcl_GetDouble(interp, argv[1], &d) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
slavePtr->relY = d;
} else if ((c == 'w') && (strncmp(argv[0], "-width", length) == 0)) {
if (argv[1][0] == 0) {
slavePtr->flags &= ~CHILD_WIDTH;
} else {
if (Tk_GetPixels(interp, slavePtr->tkwin, argv[1],
&slavePtr->width) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
slavePtr->flags |= CHILD_WIDTH;
}
} else if ((c == 'x') && (strncmp(argv[0], "-x", length) == 0)) {
if (Tk_GetPixels(interp, slavePtr->tkwin, argv[1],
&slavePtr->x) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
} else if ((c == 'y') && (strncmp(argv[0], "-y", length) == 0)) {
if (Tk_GetPixels(interp, slavePtr->tkwin, argv[1],
&slavePtr->y) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
} else {
Tcl_AppendResult(interp, "unknown or ambiguous option \"",
argv[0], "\": must be -anchor, -bordermode, -height, ",
"-in, -relheight, -relwidth, -relx, -rely, -width, ",
"-x, or -y", (char *) NULL);
result = TCL_ERROR;
goto done;
}
}
/*
* If there's no master specified for this slave, use its Tk_Parent.
* Then arrange for a placement recalculation in the master.
*/
done:
masterPtr = slavePtr->masterPtr;
if (masterPtr == NULL) {
masterPtr = FindMaster(Tk_Parent(slavePtr->tkwin));
slavePtr->masterPtr = masterPtr;
slavePtr->nextPtr = masterPtr->slavePtr;
masterPtr->slavePtr = slavePtr;
}
if (!(masterPtr->flags & PARENT_RECONFIG_PENDING)) {
masterPtr->flags |= PARENT_RECONFIG_PENDING;
Tcl_DoWhenIdle(RecomputePlacement, (ClientData) masterPtr);
}
return result;
}
/*
*----------------------------------------------------------------------
*
* RecomputePlacement --
*
* This procedure is called as a when-idle handler. It recomputes
* the geometries of all the slaves of a given master.
*
* Results:
* None.
*
* Side effects:
* Windows may change size or shape.
*
*----------------------------------------------------------------------
*/
static void
RecomputePlacement(clientData)
ClientData clientData; /* Pointer to Master record. */
{
register Master *masterPtr = (Master *) clientData;
register Slave *slavePtr;
int x, y, width, height, tmp;
int masterWidth, masterHeight, masterBW;
double x1, y1, x2, y2;
masterPtr->flags &= ~PARENT_RECONFIG_PENDING;
/*
* Iterate over all the slaves for the master. Each slave's
* geometry can be computed independently of the other slaves.
*/
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
/*
* Step 1: compute size and borderwidth of master, taking into
* account desired border mode.
*/
masterBW = 0;
masterWidth = Tk_Width(masterPtr->tkwin);
masterHeight = Tk_Height(masterPtr->tkwin);
if (slavePtr->borderMode == BM_INSIDE) {
masterBW = Tk_InternalBorderWidth(masterPtr->tkwin);
} else if (slavePtr->borderMode == BM_OUTSIDE) {
masterBW = -Tk_BorderWidth(masterPtr->tkwin);
}
masterWidth -= 2*masterBW;
masterHeight -= 2*masterBW;
/*
* Step 2: compute size of slave (outside dimensions including
* border) and location of anchor point within master.
*/
x1 = slavePtr->x + masterBW + (slavePtr->relX*masterWidth);
x = x1 + ((x1 > 0) ? 0.5 : -0.5);
y1 = slavePtr->y + masterBW + (slavePtr->relY*masterHeight);
y = y1 + ((y1 > 0) ? 0.5 : -0.5);
if (slavePtr->flags & (CHILD_WIDTH|CHILD_REL_WIDTH)) {
width = 0;
if (slavePtr->flags & CHILD_WIDTH) {
width += slavePtr->width;
}
if (slavePtr->flags & CHILD_REL_WIDTH) {
/*
* The code below is a bit tricky. In order to round
* correctly when both relX and relWidth are specified,
* compute the location of the right edge and round that,
* then compute width. If we compute the width and round
* it, rounding errors in relX and relWidth accumulate.
*/
x2 = x1 + (slavePtr->relWidth*masterWidth);
tmp = x2 + ((x2 > 0) ? 0.5 : -0.5);
width += tmp - x;
}
} else {
width = Tk_ReqWidth(slavePtr->tkwin)
+ 2*Tk_BorderWidth(slavePtr->tkwin);
}
if (slavePtr->flags & (CHILD_HEIGHT|CHILD_REL_HEIGHT)) {
height = 0;
if (slavePtr->flags & CHILD_HEIGHT) {
height += slavePtr->height;
}
if (slavePtr->flags & CHILD_REL_HEIGHT) {
/*
* See note above for rounding errors in width computation.
*/
y2 = y1 + (slavePtr->relHeight*masterHeight);
tmp = y2 + ((y2 > 0) ? 0.5 : -0.5);
height += tmp - y;
}
} else {
height = Tk_ReqHeight(slavePtr->tkwin)
+ 2*Tk_BorderWidth(slavePtr->tkwin);
}
/*
* Step 3: adjust the x and y positions so that the desired
* anchor point on the slave appears at that position. Also
* adjust for the border mode and master's border.
*/
switch (slavePtr->anchor) {
case TK_ANCHOR_N:
x -= width/2;
break;
case TK_ANCHOR_NE:
x -= width;
break;
case TK_ANCHOR_E:
x -= width;
y -= height/2;
break;
case TK_ANCHOR_SE:
x -= width;
y -= height;
break;
case TK_ANCHOR_S:
x -= width/2;
y -= height;
break;
case TK_ANCHOR_SW:
y -= height;
break;
case TK_ANCHOR_W:
y -= height/2;
break;
case TK_ANCHOR_NW:
break;
case TK_ANCHOR_CENTER:
x -= width/2;
y -= height/2;
break;
}
/*
* Step 4: adjust width and height again to reflect inside dimensions
* of window rather than outside. Also make sure that the width and
* height aren't zero.
*/
width -= 2*Tk_BorderWidth(slavePtr->tkwin);
height -= 2*Tk_BorderWidth(slavePtr->tkwin);
if (width <= 0) {
width = 1;
}
if (height <= 0) {
height = 1;
}
/*
* Step 5: reconfigure the window and map it if needed. If the
* slave is a child of the master, we do this ourselves. If the
* slave isn't a child of the master, let Tk_MaintainWindow do
* the work (it will re-adjust things as relevant windows map,
* unmap, and move).
*/
if (masterPtr->tkwin == Tk_Parent(slavePtr->tkwin)) {
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);
}
/*
* Don't map the slave unless the master is mapped: the slave
* will get mapped later, when the master is mapped.
*/
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);
}
}
}
}
/*
*----------------------------------------------------------------------
*
* MasterStructureProc --
*
* This procedure is invoked by the Tk event handler when
* StructureNotify events occur for a master window.
*
* Results:
* None.
*
* Side effects:
* Structures get cleaned up if the window was deleted. If the
* window was resized then slave geometries get recomputed.
*
*----------------------------------------------------------------------
*/
static void
MasterStructureProc(clientData, eventPtr)
ClientData clientData; /* Pointer to Master structure for window
* referred to by eventPtr. */
XEvent *eventPtr; /* Describes what just happened. */
{
register Master *masterPtr = (Master *) clientData;
register Slave *slavePtr, *nextPtr;
if (eventPtr->type == ConfigureNotify) {
if ((masterPtr->slavePtr != NULL)
&& !(masterPtr->flags & PARENT_RECONFIG_PENDING)) {
masterPtr->flags |= PARENT_RECONFIG_PENDING;
Tcl_DoWhenIdle(RecomputePlacement, (ClientData) masterPtr);
}
} else if (eventPtr->type == DestroyNotify) {
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = nextPtr) {
slavePtr->masterPtr = NULL;
nextPtr = slavePtr->nextPtr;
slavePtr->nextPtr = NULL;
}
Tcl_DeleteHashEntry(Tcl_FindHashEntry(&masterTable,
(char *) masterPtr->tkwin));
if (masterPtr->flags & PARENT_RECONFIG_PENDING) {
Tcl_CancelIdleCall(RecomputePlacement, (ClientData) masterPtr);
}
masterPtr->tkwin = NULL;
ckfree((char *) masterPtr);
} else if (eventPtr->type == MapNotify) {
/*
* When a master gets mapped, must redo the geometry computation
* so that all of its slaves get remapped.
*/
if ((masterPtr->slavePtr != NULL)
&& !(masterPtr->flags & PARENT_RECONFIG_PENDING)) {
masterPtr->flags |= PARENT_RECONFIG_PENDING;
Tcl_DoWhenIdle(RecomputePlacement, (ClientData) masterPtr);
}
} else if (eventPtr->type == UnmapNotify) {
/*
* Unmap all of the slaves when the master gets unmapped,
* so that they don't keep redisplaying themselves.
*/
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
slavePtr = slavePtr->nextPtr) {
Tk_UnmapWindow(slavePtr->tkwin);
}
}
}
/*
*----------------------------------------------------------------------
*
* SlaveStructureProc --
*
* This procedure is invoked by the Tk event handler when
* StructureNotify events occur for a slave window.
*
* Results:
* None.
*
* Side effects:
* Structures get cleaned up if the window was deleted.
*
*----------------------------------------------------------------------
*/
static void
SlaveStructureProc(clientData, eventPtr)
ClientData clientData; /* Pointer to Slave structure for window
* referred to by eventPtr. */
XEvent *eventPtr; /* Describes what just happened. */
{
register Slave *slavePtr = (Slave *) clientData;
if (eventPtr->type == DestroyNotify) {
UnlinkSlave(slavePtr);
Tcl_DeleteHashEntry(Tcl_FindHashEntry(&slaveTable,
(char *) slavePtr->tkwin));
ckfree((char *) slavePtr);
}
}
/*
*----------------------------------------------------------------------
*
* PlaceRequestProc --
*
* This procedure is invoked by Tk whenever a slave managed by us
* changes its requested geometry.
*
* Results:
* None.
*
* Side effects:
* The window will get relayed out, if its requested size has
* anything to do with its actual size.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
static void
PlaceRequestProc(clientData, tkwin)
ClientData clientData; /* Pointer to our record for slave. */
Tk_Window tkwin; /* Window that changed its desired
* size. */
{
Slave *slavePtr = (Slave *) clientData;
Master *masterPtr;
if (((slavePtr->flags & (CHILD_WIDTH|CHILD_REL_WIDTH)) != 0)
&& ((slavePtr->flags & (CHILD_HEIGHT|CHILD_REL_HEIGHT)) != 0)) {
return;
}
masterPtr = slavePtr->masterPtr;
if (masterPtr == NULL) {
return;
}
if (!(masterPtr->flags & PARENT_RECONFIG_PENDING)) {
masterPtr->flags |= PARENT_RECONFIG_PENDING;
Tcl_DoWhenIdle(RecomputePlacement, (ClientData) masterPtr);
}
}
/*
*--------------------------------------------------------------
*
* PlaceLostSlaveProc --
*
* 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 placer-related information about the slave.
*
*--------------------------------------------------------------
*/
/* ARGSUSED */
static void
PlaceLostSlaveProc(clientData, tkwin)
ClientData clientData; /* Slave structure for slave window that
* was stolen away. */
Tk_Window tkwin; /* Tk's handle for the slave window. */
{
register Slave *slavePtr = (Slave *) clientData;
if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) {
Tk_UnmaintainGeometry(slavePtr->tkwin, slavePtr->masterPtr->tkwin);
}
Tk_UnmapWindow(tkwin);
UnlinkSlave(slavePtr);
Tcl_DeleteHashEntry(Tcl_FindHashEntry(&slaveTable, (char *) tkwin));
Tk_DeleteEventHandler(tkwin, StructureNotifyMask, SlaveStructureProc,
(ClientData) slavePtr);
ckfree((char *) slavePtr);
}