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author | William Joye <wjoye@cfa.harvard.edu> | 2016-10-18 17:31:55 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2016-10-18 17:31:55 (GMT) |
commit | 39e34335fb6eb6eaf2b7ee51ccf172006dd46fbb (patch) | |
tree | 8e5374666c7f0b3017176ec9d6e6b6eae0dcabac /tk8.6/generic/tkPack.c | |
parent | 066971b1e6e77991d9161bb0216a63ba94ea04f9 (diff) | |
parent | 6b095f3c8521ca7215e6ff5dcbada52b197ef7d0 (diff) | |
download | blt-39e34335fb6eb6eaf2b7ee51ccf172006dd46fbb.zip blt-39e34335fb6eb6eaf2b7ee51ccf172006dd46fbb.tar.gz blt-39e34335fb6eb6eaf2b7ee51ccf172006dd46fbb.tar.bz2 |
Merge commit '6b095f3c8521ca7215e6ff5dcbada52b197ef7d0' as 'tk8.6'
Diffstat (limited to 'tk8.6/generic/tkPack.c')
-rw-r--r-- | tk8.6/generic/tkPack.c | 1859 |
1 files changed, 1859 insertions, 0 deletions
diff --git a/tk8.6/generic/tkPack.c b/tk8.6/generic/tkPack.c new file mode 100644 index 0000000..88a4b2d --- /dev/null +++ b/tk8.6/generic/tkPack.c @@ -0,0 +1,1859 @@ +/* + * tkPack.c -- + * + * This file contains code to implement the "packer" geometry manager for + * Tk. + * + * Copyright (c) 1990-1994 The Regents of the University of California. + * Copyright (c) 1994-1997 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. + */ + +#include "tkInt.h" + +typedef enum {TOP, BOTTOM, LEFT, RIGHT} Side; +static const char *const sideNames[] = { + "top", "bottom", "left", "right", NULL +}; + +/* + * For each window that the packer cares about (either because the window is + * managed by the packer or because the window has slaves that are managed by + * the packer), there is a structure of the following type: + */ + +typedef struct Packer { + Tk_Window tkwin; /* Tk token for window. NULL means that the + * window has been deleted, but the packet + * hasn't had a chance to clean up yet because + * the structure is still in use. */ + struct Packer *masterPtr; /* Master window within which this window is + * packed (NULL means this window isn't + * managed by the packer). */ + struct Packer *nextPtr; /* Next window packed within same master. List + * is priority-ordered: first on list gets + * packed first. */ + struct Packer *slavePtr; /* First in list of slaves packed inside this + * window (NULL means no packed slaves). */ + Side side; /* Side of master against which this window is + * packed. */ + Tk_Anchor anchor; /* If frame allocated for window is larger + * than window needs, this indicates how where + * to position window in frame. */ + int padX, padY; /* Total additional pixels to leave around the + * window. Some is of this space is on each + * side. This is space *outside* the window: + * we'll allocate extra space in frame but + * won't enlarge window). */ + int padLeft, padTop; /* The part of padX or padY to use on the left + * or top of the widget, respectively. By + * default, this is half of padX or padY. */ + int iPadX, iPadY; /* Total extra pixels to allocate inside the + * window (half of this amount will appear on + * each side). */ + int doubleBw; /* Twice the window's last known border width. + * If this changes, the window must be + * repacked within its master. */ + int *abortPtr; /* If non-NULL, it means that there is a + * nested call to ArrangePacking already + * working on this window. *abortPtr may be + * set to 1 to abort that nested call. This + * happens, for example, if tkwin or any of + * its slaves is deleted. */ + int flags; /* Miscellaneous flags; see below for + * definitions. */ +} Packer; + +/* + * Flag values for Packer structures: + * + * REQUESTED_REPACK: 1 means a Tcl_DoWhenIdle request has already + * been made to repack all the slaves of this + * window. + * FILLX: 1 means if frame allocated for window is wider + * than window needs, expand window to fill + * frame. 0 means don't make window any larger + * than needed. + * FILLY: Same as FILLX, except for height. + * EXPAND: 1 means this window's frame will absorb any + * extra space in the master window. + * OLD_STYLE: 1 means this window is being managed with the + * old-style packer algorithms (before Tk version + * 3.3). The main difference is that padding and + * filling are done differently. + * DONT_PROPAGATE: 1 means don't set this window's requested + * size. 0 means if this window is a master then + * Tk will set its requested size to fit the + * needs of its slaves. + * ALLOCED_MASTER 1 means that Pack has allocated itself as + * geometry master for this window. + */ + +#define REQUESTED_REPACK 1 +#define FILLX 2 +#define FILLY 4 +#define EXPAND 8 +#define OLD_STYLE 16 +#define DONT_PROPAGATE 32 +#define ALLOCED_MASTER 64 + +/* + * The following structure is the official type record for the packer: + */ + +static void PackReqProc(ClientData clientData, Tk_Window tkwin); +static void PackLostSlaveProc(ClientData clientData, + Tk_Window tkwin); + +static const Tk_GeomMgr packerType = { + "pack", /* name */ + PackReqProc, /* requestProc */ + PackLostSlaveProc, /* lostSlaveProc */ +}; + +/* + * Forward declarations for functions defined later in this file: + */ + +static void ArrangePacking(ClientData clientData); +static int ConfigureSlaves(Tcl_Interp *interp, Tk_Window tkwin, + int objc, Tcl_Obj *const objv[]); +static void DestroyPacker(void *memPtr); +static Packer * GetPacker(Tk_Window tkwin); +static int PackAfter(Tcl_Interp *interp, Packer *prevPtr, + Packer *masterPtr, int objc,Tcl_Obj *const objv[]); +static void PackStructureProc(ClientData clientData, + XEvent *eventPtr); +static void Unlink(Packer *packPtr); +static int XExpansion(Packer *slavePtr, int cavityWidth); +static int YExpansion(Packer *slavePtr, int cavityHeight); + +/* + *------------------------------------------------------------------------ + * + * TkAppendPadAmount -- + * + * This function generates a text value that describes one of the -padx, + * -pady, -ipadx, or -ipady configuration options. The text value + * generated is appended to the given Tcl_Obj. + * + * Results: + * None. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------ + */ + +void +TkAppendPadAmount( + Tcl_Obj *bufferObj, /* The interpreter into which the result is + * written. */ + const char *switchName, /* One of "padx", "pady", "ipadx" or + * "ipady" */ + int halfSpace, /* The left or top padding amount */ + int allSpace) /* The total amount of padding */ +{ + Tcl_Obj *padding[2]; + + if (halfSpace*2 == allSpace) { + Tcl_DictObjPut(NULL, bufferObj, Tcl_NewStringObj(switchName, -1), + Tcl_NewIntObj(halfSpace)); + } else { + padding[0] = Tcl_NewIntObj(halfSpace); + padding[1] = Tcl_NewIntObj(allSpace - halfSpace); + Tcl_DictObjPut(NULL, bufferObj, Tcl_NewStringObj(switchName, -1), + Tcl_NewListObj(2, padding)); + } +} + +/* + *------------------------------------------------------------------------ + * + * Tk_PackCmd -- + * + * This function is invoked to process the "pack" Tcl command. See the + * user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *------------------------------------------------------------------------ + */ + +int +Tk_PackObjCmd( + ClientData clientData, /* Main window associated with interpreter. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + Tk_Window tkwin = clientData; + const char *argv2; + static const char *const optionStrings[] = { + /* after, append, before and unpack are deprecated */ + "after", "append", "before", "unpack", + "configure", "forget", "info", "propagate", "slaves", NULL }; + enum options { + PACK_AFTER, PACK_APPEND, PACK_BEFORE, PACK_UNPACK, + PACK_CONFIGURE, PACK_FORGET, PACK_INFO, PACK_PROPAGATE, PACK_SLAVES }; + int index; + + if (objc >= 2) { + const char *string = Tcl_GetString(objv[1]); + + if (string[0] == '.') { + return ConfigureSlaves(interp, tkwin, objc-1, objv+1); + } + } + if (objc < 3) { + Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg ...?"); + return TCL_ERROR; + } + + if (Tcl_GetIndexFromObjStruct(interp, objv[1], optionStrings, + sizeof(char *), "option", 0, &index) != TCL_OK) { + /* + * Call it again without the deprecated ones to get a proper error + * message. This works well since there can't be any ambiguity between + * deprecated and new options. + */ + + Tcl_ResetResult(interp); + Tcl_GetIndexFromObjStruct(interp, objv[1], &optionStrings[4], + sizeof(char *), "option", 0, &index); + return TCL_ERROR; + } + + argv2 = Tcl_GetString(objv[2]); + switch ((enum options) index) { + case PACK_AFTER: { + Packer *prevPtr; + Tk_Window tkwin2; + + if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) { + return TCL_ERROR; + } + prevPtr = GetPacker(tkwin2); + if (prevPtr->masterPtr == NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "window \"%s\" isn't packed", argv2)); + Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED", NULL); + return TCL_ERROR; + } + return PackAfter(interp, prevPtr, prevPtr->masterPtr, objc-3, objv+3); + } + case PACK_APPEND: { + Packer *masterPtr; + register Packer *prevPtr; + Tk_Window tkwin2; + + if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) { + return TCL_ERROR; + } + masterPtr = GetPacker(tkwin2); + prevPtr = masterPtr->slavePtr; + if (prevPtr != NULL) { + while (prevPtr->nextPtr != NULL) { + prevPtr = prevPtr->nextPtr; + } + } + return PackAfter(interp, prevPtr, masterPtr, objc-3, objv+3); + } + case PACK_BEFORE: { + Packer *packPtr, *masterPtr; + register Packer *prevPtr; + Tk_Window tkwin2; + + if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) { + return TCL_ERROR; + } + packPtr = GetPacker(tkwin2); + if (packPtr->masterPtr == NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "window \"%s\" isn't packed", argv2)); + Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED", NULL); + return TCL_ERROR; + } + masterPtr = packPtr->masterPtr; + prevPtr = masterPtr->slavePtr; + if (prevPtr == packPtr) { + prevPtr = NULL; + } else { + for ( ; ; prevPtr = prevPtr->nextPtr) { + if (prevPtr == NULL) { + Tcl_Panic("\"pack before\" couldn't find predecessor"); + } + if (prevPtr->nextPtr == packPtr) { + break; + } + } + } + return PackAfter(interp, prevPtr, masterPtr, objc-3, objv+3); + } + case PACK_CONFIGURE: + if (argv2[0] != '.') { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "bad argument \"%s\": must be name of window", argv2)); + Tcl_SetErrorCode(interp, "TK", "VALUE", "WINDOW_PATH", NULL); + return TCL_ERROR; + } + return ConfigureSlaves(interp, tkwin, objc-2, objv+2); + case PACK_FORGET: { + Tk_Window slave; + Packer *slavePtr; + int i; + + for (i = 2; i < objc; i++) { + if (TkGetWindowFromObj(interp, tkwin, objv[i], &slave) != TCL_OK) { + continue; + } + slavePtr = GetPacker(slave); + if ((slavePtr != NULL) && (slavePtr->masterPtr != NULL)) { + Tk_ManageGeometry(slave, NULL, NULL); + if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) { + Tk_UnmaintainGeometry(slavePtr->tkwin, + slavePtr->masterPtr->tkwin); + } + Unlink(slavePtr); + Tk_UnmapWindow(slavePtr->tkwin); + } + } + break; + } + case PACK_INFO: { + register Packer *slavePtr; + Tk_Window slave; + Tcl_Obj *infoObj; + + if (objc != 3) { + Tcl_WrongNumArgs(interp, 2, objv, "window"); + return TCL_ERROR; + } + if (TkGetWindowFromObj(interp, tkwin, objv[2], &slave) != TCL_OK) { + return TCL_ERROR; + } + slavePtr = GetPacker(slave); + if (slavePtr->masterPtr == NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "window \"%s\" isn't packed", argv2)); + Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED", NULL); + return TCL_ERROR; + } + + infoObj = Tcl_NewObj(); + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-in", -1), + TkNewWindowObj(slavePtr->masterPtr->tkwin)); + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-anchor", -1), + Tcl_NewStringObj(Tk_NameOfAnchor(slavePtr->anchor), -1)); + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-expand", -1), + Tcl_NewBooleanObj(slavePtr->flags & EXPAND)); + switch (slavePtr->flags & (FILLX|FILLY)) { + case 0: + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1), + Tcl_NewStringObj("none", -1)); + break; + case FILLX: + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1), + Tcl_NewStringObj("x", -1)); + break; + case FILLY: + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1), + Tcl_NewStringObj("y", -1)); + break; + case FILLX|FILLY: + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-fill", -1), + Tcl_NewStringObj("both", -1)); + break; + } + TkAppendPadAmount(infoObj, "-ipadx", slavePtr->iPadX/2, slavePtr->iPadX); + TkAppendPadAmount(infoObj, "-ipady", slavePtr->iPadY/2, slavePtr->iPadY); + TkAppendPadAmount(infoObj, "-padx", slavePtr->padLeft,slavePtr->padX); + TkAppendPadAmount(infoObj, "-pady", slavePtr->padTop, slavePtr->padY); + Tcl_DictObjPut(NULL, infoObj, Tcl_NewStringObj("-side", -1), + Tcl_NewStringObj(sideNames[slavePtr->side], -1)); + Tcl_SetObjResult(interp, infoObj); + break; + } + case PACK_PROPAGATE: { + Tk_Window master; + Packer *masterPtr; + int propagate; + + if (objc > 4) { + Tcl_WrongNumArgs(interp, 2, objv, "window ?boolean?"); + return TCL_ERROR; + } + if (TkGetWindowFromObj(interp, tkwin, objv[2], &master) != TCL_OK) { + return TCL_ERROR; + } + masterPtr = GetPacker(master); + if (objc == 3) { + Tcl_SetObjResult(interp, + Tcl_NewBooleanObj(!(masterPtr->flags & DONT_PROPAGATE))); + return TCL_OK; + } + if (Tcl_GetBooleanFromObj(interp, objv[3], &propagate) != TCL_OK) { + return TCL_ERROR; + } + if (propagate) { + /* + * If we have slaves, we need to register as geometry master. + */ + + if (masterPtr->slavePtr != NULL) { + if (TkSetGeometryMaster(interp, master, "pack") != TCL_OK) { + return TCL_ERROR; + } + masterPtr->flags |= ALLOCED_MASTER; + } + masterPtr->flags &= ~DONT_PROPAGATE; + + /* + * Repack the master to allow new geometry information to + * propagate upwards to the master's master. + */ + + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } + if (!(masterPtr->flags & REQUESTED_REPACK)) { + masterPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, masterPtr); + } + } else { + if (masterPtr->flags & ALLOCED_MASTER) { + TkFreeGeometryMaster(master, "pack"); + masterPtr->flags &= ~ALLOCED_MASTER; + } + masterPtr->flags |= DONT_PROPAGATE; + } + break; + } + case PACK_SLAVES: { + Tk_Window master; + Packer *masterPtr, *slavePtr; + Tcl_Obj *resultObj; + + if (objc != 3) { + Tcl_WrongNumArgs(interp, 2, objv, "window"); + return TCL_ERROR; + } + if (TkGetWindowFromObj(interp, tkwin, objv[2], &master) != TCL_OK) { + return TCL_ERROR; + } + resultObj = Tcl_NewObj(); + masterPtr = GetPacker(master); + for (slavePtr = masterPtr->slavePtr; slavePtr != NULL; + slavePtr = slavePtr->nextPtr) { + Tcl_ListObjAppendElement(NULL, resultObj, + TkNewWindowObj(slavePtr->tkwin)); + } + Tcl_SetObjResult(interp, resultObj); + break; + } + case PACK_UNPACK: { + Tk_Window tkwin2; + Packer *packPtr; + + if (objc != 3) { + Tcl_WrongNumArgs(interp, 2, objv, "window"); + return TCL_ERROR; + } + if (TkGetWindowFromObj(interp, tkwin, objv[2], &tkwin2) != TCL_OK) { + return TCL_ERROR; + } + packPtr = GetPacker(tkwin2); + if ((packPtr != NULL) && (packPtr->masterPtr != NULL)) { + Tk_ManageGeometry(tkwin2, NULL, NULL); + if (packPtr->masterPtr->tkwin != Tk_Parent(packPtr->tkwin)) { + Tk_UnmaintainGeometry(packPtr->tkwin, + packPtr->masterPtr->tkwin); + } + Unlink(packPtr); + Tk_UnmapWindow(packPtr->tkwin); + } + break; + } + } + + return TCL_OK; +} + +/* + *------------------------------------------------------------------------ + * + * PackReqProc -- + * + * This function is invoked by Tk_GeometryRequest for windows managed by + * the packer. + * + * Results: + * None. + * + * Side effects: + * Arranges for tkwin, and all its managed siblings, to be re-packed at + * the next idle point. + * + *------------------------------------------------------------------------ + */ + + /* ARGSUSED */ +static void +PackReqProc( + ClientData clientData, /* Packer's information about window that got + * new preferred geometry. */ + Tk_Window tkwin) /* Other Tk-related information about the + * window. */ +{ + register Packer *packPtr = clientData; + + packPtr = packPtr->masterPtr; + if (!(packPtr->flags & REQUESTED_REPACK)) { + packPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, packPtr); + } +} + +/* + *------------------------------------------------------------------------ + * + * PackLostSlaveProc -- + * + * This function is invoked by Tk whenever some other geometry claims + * control over a slave that used to be managed by us. + * + * Results: + * None. + * + * Side effects: + * Forgets all packer-related information about the slave. + * + *------------------------------------------------------------------------ + */ + + /* ARGSUSED */ +static void +PackLostSlaveProc( + ClientData clientData, /* Packer structure for slave window that was + * stolen away. */ + Tk_Window tkwin) /* Tk's handle for the slave window. */ +{ + register Packer *slavePtr = clientData; + + if (slavePtr->masterPtr->tkwin != Tk_Parent(slavePtr->tkwin)) { + Tk_UnmaintainGeometry(slavePtr->tkwin, slavePtr->masterPtr->tkwin); + } + Unlink(slavePtr); + Tk_UnmapWindow(slavePtr->tkwin); +} + +/* + *------------------------------------------------------------------------ + * + * ArrangePacking -- + * + * This function is invoked (using the Tcl_DoWhenIdle mechanism) to + * re-layout a set of windows managed by the packer. It is invoked at + * idle time so that a series of packer requests can be merged into a + * single layout operation. + * + * Results: + * None. + * + * Side effects: + * The packed slaves of masterPtr may get resized or moved. + * + *------------------------------------------------------------------------ + */ + +static void +ArrangePacking( + ClientData clientData) /* Structure describing master whose slaves + * are to be re-layed out. */ +{ + register Packer *masterPtr = clientData; + register Packer *slavePtr; + int cavityX, cavityY, cavityWidth, cavityHeight; + /* These variables keep track of the + * as-yet-unallocated space remaining in the + * middle of the master window. */ + int frameX, frameY, frameWidth, frameHeight; + /* These variables keep track of the frame + * allocated to the current window. */ + int x, y, width, height; /* These variables are used to hold the actual + * geometry of the current window. */ + int abort; /* May get set to non-zero to abort this + * repacking operation. */ + int borderX, borderY; + int borderTop, borderBtm; + int borderLeft, borderRight; + int maxWidth, maxHeight, tmp; + + masterPtr->flags &= ~REQUESTED_REPACK; + + /* + * If the master has no slaves anymore, then don't do anything at all: + * just leave the master's size as-is. + */ + + if (masterPtr->slavePtr == NULL) { + return; + } + + /* + * Abort any nested call to ArrangePacking for this window, since we'll do + * everything necessary here, and set up so this call can be aborted if + * necessary. + */ + + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } + masterPtr->abortPtr = &abort; + abort = 0; + Tcl_Preserve(masterPtr); + + /* + * Pass #1: scan all the slaves to figure out the total amount of space + * needed. Two separate width and height values are computed: + * + * width - Holds the sum of the widths (plus padding) of all the + * slaves seen so far that were packed LEFT or RIGHT. + * height - Holds the sum of the heights (plus padding) of all the + * slaves seen so far that were packed TOP or BOTTOM. + * + * maxWidth - Gradually builds up the width needed by the master to + * just barely satisfy all the slave's needs. For each + * slave, the code computes the width needed for all the + * slaves so far and updates maxWidth if the new value is + * greater. + * maxHeight - Same as maxWidth, except keeps height info. + */ + + width = maxWidth = Tk_InternalBorderLeft(masterPtr->tkwin) + + Tk_InternalBorderRight(masterPtr->tkwin); + height = maxHeight = Tk_InternalBorderTop(masterPtr->tkwin) + + Tk_InternalBorderBottom(masterPtr->tkwin); + for (slavePtr = masterPtr->slavePtr; slavePtr != NULL; + slavePtr = slavePtr->nextPtr) { + if ((slavePtr->side == TOP) || (slavePtr->side == BOTTOM)) { + tmp = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padX + slavePtr->iPadX + width; + if (tmp > maxWidth) { + maxWidth = tmp; + } + height += Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padY + slavePtr->iPadY; + } else { + tmp = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padY + slavePtr->iPadY + height; + if (tmp > maxHeight) { + maxHeight = tmp; + } + width += Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padX + slavePtr->iPadX; + } + } + if (width > maxWidth) { + maxWidth = width; + } + if (height > maxHeight) { + maxHeight = height; + } + + if (maxWidth < Tk_MinReqWidth(masterPtr->tkwin)) { + maxWidth = Tk_MinReqWidth(masterPtr->tkwin); + } + if (maxHeight < Tk_MinReqHeight(masterPtr->tkwin)) { + maxHeight = Tk_MinReqHeight(masterPtr->tkwin); + } + + /* + * If the total amount of space needed in the master window has changed, + * and if we're propagating geometry information, then notify the next + * geometry manager up and requeue ourselves to start again after the + * master has had a chance to resize us. + */ + + if (((maxWidth != Tk_ReqWidth(masterPtr->tkwin)) + || (maxHeight != Tk_ReqHeight(masterPtr->tkwin))) + && !(masterPtr->flags & DONT_PROPAGATE)) { + Tk_GeometryRequest(masterPtr->tkwin, maxWidth, maxHeight); + masterPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, masterPtr); + goto done; + } + + /* + * Pass #2: scan the slaves a second time assigning new sizes. The + * "cavity" variables keep track of the unclaimed space in the cavity of + * the window; this shrinks inward as we allocate windows around the + * edges. The "frame" variables keep track of the space allocated to the + * current window and its frame. The current window is then placed + * somewhere inside the frame, depending on anchor. + */ + + cavityX = x = Tk_InternalBorderLeft(masterPtr->tkwin); + cavityY = y = Tk_InternalBorderTop(masterPtr->tkwin); + cavityWidth = Tk_Width(masterPtr->tkwin) - + Tk_InternalBorderLeft(masterPtr->tkwin) - + Tk_InternalBorderRight(masterPtr->tkwin); + cavityHeight = Tk_Height(masterPtr->tkwin) - + Tk_InternalBorderTop(masterPtr->tkwin) - + Tk_InternalBorderBottom(masterPtr->tkwin); + for (slavePtr = masterPtr->slavePtr; slavePtr != NULL; + slavePtr = slavePtr->nextPtr) { + if ((slavePtr->side == TOP) || (slavePtr->side == BOTTOM)) { + frameWidth = cavityWidth; + frameHeight = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padY + slavePtr->iPadY; + if (slavePtr->flags & EXPAND) { + frameHeight += YExpansion(slavePtr, cavityHeight); + } + cavityHeight -= frameHeight; + if (cavityHeight < 0) { + frameHeight += cavityHeight; + cavityHeight = 0; + } + frameX = cavityX; + if (slavePtr->side == TOP) { + frameY = cavityY; + cavityY += frameHeight; + } else { + frameY = cavityY + cavityHeight; + } + } else { + frameHeight = cavityHeight; + frameWidth = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padX + slavePtr->iPadX; + if (slavePtr->flags & EXPAND) { + frameWidth += XExpansion(slavePtr, cavityWidth); + } + cavityWidth -= frameWidth; + if (cavityWidth < 0) { + frameWidth += cavityWidth; + cavityWidth = 0; + } + frameY = cavityY; + if (slavePtr->side == LEFT) { + frameX = cavityX; + cavityX += frameWidth; + } else { + frameX = cavityX + cavityWidth; + } + } + + /* + * Now that we've got the size of the frame for the window, compute + * the window's actual size and location using the fill, padding, and + * frame factors. The variables "borderX" and "borderY" are used to + * handle the differences between old-style packing and the new style + * (in old-style, iPadX and iPadY are always zero and padding is + * completely ignored except when computing frame size). + */ + + if (slavePtr->flags & OLD_STYLE) { + borderX = borderY = 0; + borderTop = borderBtm = 0; + borderLeft = borderRight = 0; + } else { + borderX = slavePtr->padX; + borderY = slavePtr->padY; + borderLeft = slavePtr->padLeft; + borderRight = borderX - borderLeft; + borderTop = slavePtr->padTop; + borderBtm = borderY - borderTop; + } + width = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->iPadX; + if ((slavePtr->flags & FILLX) + || (width > (frameWidth - borderX))) { + width = frameWidth - borderX; + } + height = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->iPadY; + if ((slavePtr->flags & FILLY) + || (height > (frameHeight - borderY))) { + height = frameHeight - borderY; + } + switch (slavePtr->anchor) { + case TK_ANCHOR_N: + x = frameX + (borderLeft + frameWidth - width - borderRight)/2; + y = frameY + borderTop; + break; + case TK_ANCHOR_NE: + x = frameX + frameWidth - width - borderRight; + y = frameY + borderTop; + break; + case TK_ANCHOR_E: + x = frameX + frameWidth - width - borderRight; + y = frameY + (borderTop + frameHeight - height - borderBtm)/2; + break; + case TK_ANCHOR_SE: + x = frameX + frameWidth - width - borderRight; + y = frameY + frameHeight - height - borderBtm; + break; + case TK_ANCHOR_S: + x = frameX + (borderLeft + frameWidth - width - borderRight)/2; + y = frameY + frameHeight - height - borderBtm; + break; + case TK_ANCHOR_SW: + x = frameX + borderLeft; + y = frameY + frameHeight - height - borderBtm; + break; + case TK_ANCHOR_W: + x = frameX + borderLeft; + y = frameY + (borderTop + frameHeight - height - borderBtm)/2; + break; + case TK_ANCHOR_NW: + x = frameX + borderLeft; + y = frameY + borderTop; + break; + case TK_ANCHOR_CENTER: + x = frameX + (borderLeft + frameWidth - width - borderRight)/2; + y = frameY + (borderTop + frameHeight - height - borderBtm)/2; + break; + default: + Tcl_Panic("bad frame factor in ArrangePacking"); + } + width -= slavePtr->doubleBw; + height -= slavePtr->doubleBw; + + /* + * The final step is to set the position, size, and mapped/unmapped + * state of the slave. If the slave is a child of the master, then do + * this here. Otherwise let Tk_MaintainGeometry do the work. + */ + + if (masterPtr->tkwin == Tk_Parent(slavePtr->tkwin)) { + if ((width <= 0) || (height <= 0)) { + Tk_UnmapWindow(slavePtr->tkwin); + } else { + if ((x != Tk_X(slavePtr->tkwin)) + || (y != Tk_Y(slavePtr->tkwin)) + || (width != Tk_Width(slavePtr->tkwin)) + || (height != Tk_Height(slavePtr->tkwin))) { + Tk_MoveResizeWindow(slavePtr->tkwin, x, y, width, height); + } + if (abort) { + goto done; + } + + /* + * Don't map the slave if the master isn't mapped: wait until + * the master gets mapped later. + */ + + if (Tk_IsMapped(masterPtr->tkwin)) { + Tk_MapWindow(slavePtr->tkwin); + } + } + } else { + if ((width <= 0) || (height <= 0)) { + Tk_UnmaintainGeometry(slavePtr->tkwin, masterPtr->tkwin); + Tk_UnmapWindow(slavePtr->tkwin); + } else { + Tk_MaintainGeometry(slavePtr->tkwin, masterPtr->tkwin, + x, y, width, height); + } + } + + /* + * Changes to the window's structure could cause almost anything to + * happen, including deleting the parent or child. If this happens, + * we'll be told to abort. + */ + + if (abort) { + goto done; + } + } + + done: + masterPtr->abortPtr = NULL; + Tcl_Release(masterPtr); +} + +/* + *---------------------------------------------------------------------- + * + * XExpansion -- + * + * Given a list of packed slaves, the first of which is packed on the + * left or right and is expandable, compute how much to expand the child. + * + * Results: + * The return value is the number of additional pixels to give to the + * child. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +static int +XExpansion( + register Packer *slavePtr, /* First in list of remaining slaves. */ + int cavityWidth) /* Horizontal space left for all remaining + * slaves. */ +{ + int numExpand, minExpand, curExpand; + int childWidth; + + /* + * This function is tricky because windows packed top or bottom can be + * interspersed among expandable windows packed left or right. Scan + * through the list, keeping a running sum of the widths of all left and + * right windows (actually, count the cavity space not allocated) and a + * running count of all expandable left and right windows. At each top or + * bottom window, and at the end of the list, compute the expansion factor + * that seems reasonable at that point. Return the smallest factor seen at + * any of these points. + */ + + minExpand = cavityWidth; + numExpand = 0; + for ( ; slavePtr != NULL; slavePtr = slavePtr->nextPtr) { + childWidth = Tk_ReqWidth(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padX + slavePtr->iPadX; + if ((slavePtr->side == TOP) || (slavePtr->side == BOTTOM)) { + if (numExpand) { + curExpand = (cavityWidth - childWidth)/numExpand; + if (curExpand < minExpand) { + minExpand = curExpand; + } + } + } else { + cavityWidth -= childWidth; + if (slavePtr->flags & EXPAND) { + numExpand++; + } + } + } + if (numExpand) { + curExpand = cavityWidth/numExpand; + if (curExpand < minExpand) { + minExpand = curExpand; + } + } + return (minExpand < 0) ? 0 : minExpand; +} + +/* + *---------------------------------------------------------------------- + * + * YExpansion -- + * + * Given a list of packed slaves, the first of which is packed on the top + * or bottom and is expandable, compute how much to expand the child. + * + * Results: + * The return value is the number of additional pixels to give to the + * child. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +static int +YExpansion( + register Packer *slavePtr, /* First in list of remaining slaves. */ + int cavityHeight) /* Vertical space left for all remaining + * slaves. */ +{ + int numExpand, minExpand, curExpand; + int childHeight; + + /* + * See comments for XExpansion. + */ + + minExpand = cavityHeight; + numExpand = 0; + for ( ; slavePtr != NULL; slavePtr = slavePtr->nextPtr) { + childHeight = Tk_ReqHeight(slavePtr->tkwin) + slavePtr->doubleBw + + slavePtr->padY + slavePtr->iPadY; + if ((slavePtr->side == LEFT) || (slavePtr->side == RIGHT)) { + if (numExpand) { + curExpand = (cavityHeight - childHeight)/numExpand; + if (curExpand < minExpand) { + minExpand = curExpand; + } + } + } else { + cavityHeight -= childHeight; + if (slavePtr->flags & EXPAND) { + numExpand++; + } + } + } + if (numExpand) { + curExpand = cavityHeight/numExpand; + if (curExpand < minExpand) { + minExpand = curExpand; + } + } + return (minExpand < 0) ? 0 : minExpand; +} + +/* + *------------------------------------------------------------------------ + * + * GetPacker -- + * + * This internal function is used to locate a Packer structure for a + * given window, creating one if one doesn't exist already. + * + * Results: + * The return value is a pointer to the Packer structure corresponding to + * tkwin. + * + * Side effects: + * A new packer structure may be created. If so, then a callback is set + * up to clean things up when the window is deleted. + * + *------------------------------------------------------------------------ + */ + +static Packer * +GetPacker( + Tk_Window tkwin) /* Token for window for which packer structure + * is desired. */ +{ + register Packer *packPtr; + Tcl_HashEntry *hPtr; + int isNew; + TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; + + if (!dispPtr->packInit) { + dispPtr->packInit = 1; + Tcl_InitHashTable(&dispPtr->packerHashTable, TCL_ONE_WORD_KEYS); + } + + /* + * See if there's already packer for this window. If not, then create a + * new one. + */ + + hPtr = Tcl_CreateHashEntry(&dispPtr->packerHashTable, (char *) tkwin, + &isNew); + if (!isNew) { + return Tcl_GetHashValue(hPtr); + } + packPtr = ckalloc(sizeof(Packer)); + packPtr->tkwin = tkwin; + packPtr->masterPtr = NULL; + packPtr->nextPtr = NULL; + packPtr->slavePtr = NULL; + packPtr->side = TOP; + packPtr->anchor = TK_ANCHOR_CENTER; + packPtr->padX = packPtr->padY = 0; + packPtr->padLeft = packPtr->padTop = 0; + packPtr->iPadX = packPtr->iPadY = 0; + packPtr->doubleBw = 2*Tk_Changes(tkwin)->border_width; + packPtr->abortPtr = NULL; + packPtr->flags = 0; + Tcl_SetHashValue(hPtr, packPtr); + Tk_CreateEventHandler(tkwin, StructureNotifyMask, + PackStructureProc, packPtr); + return packPtr; +} + +/* + *------------------------------------------------------------------------ + * + * PackAfter -- + * + * This function does most of the real work of adding one or more windows + * into the packing order for its master. + * + * Results: + * A standard Tcl return value. + * + * Side effects: + * The geometry of the specified windows may change, both now and again + * in the future. + * + *------------------------------------------------------------------------ + */ + +static int +PackAfter( + Tcl_Interp *interp, /* Interpreter for error reporting. */ + Packer *prevPtr, /* Pack windows in argv just after this + * window; NULL means pack as first child of + * masterPtr. */ + Packer *masterPtr, /* Master in which to pack windows. */ + int objc, /* Number of elements in objv. */ + Tcl_Obj *const objv[]) /* Array of lists, each containing 2 elements: + * window name and side against which to + * pack. */ +{ + register Packer *packPtr; + Tk_Window tkwin, ancestor, parent; + Tcl_Obj **options; + int index, optionCount, c; + + /* + * Iterate over all of the window specifiers, each consisting of two + * arguments. The first argument contains the window name and the + * additional arguments contain options such as "top" or "padx 20". + */ + + for ( ; objc > 0; objc -= 2, objv += 2, prevPtr = packPtr) { + if (objc < 2) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "wrong # args: window \"%s\" should be followed by options", + Tcl_GetString(objv[0]))); + Tcl_SetErrorCode(interp, "TCL", "WRONGARGS", NULL); + return TCL_ERROR; + } + + /* + * Find the packer for the window to be packed, and make sure that the + * window in which it will be packed is either its or a descendant of + * its parent. + */ + + if (TkGetWindowFromObj(interp, masterPtr->tkwin, objv[0], &tkwin) + != TCL_OK) { + return TCL_ERROR; + } + + parent = Tk_Parent(tkwin); + for (ancestor = masterPtr->tkwin; ; ancestor = Tk_Parent(ancestor)) { + if (ancestor == parent) { + break; + } + if (((Tk_FakeWin *) (ancestor))->flags & TK_TOP_HIERARCHY) { + badWindow: + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't pack %s inside %s", Tcl_GetString(objv[0]), + Tk_PathName(masterPtr->tkwin))); + Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "HIERARCHY", NULL); + return TCL_ERROR; + } + } + if (((Tk_FakeWin *) (tkwin))->flags & TK_TOP_HIERARCHY) { + goto badWindow; + } + if (tkwin == masterPtr->tkwin) { + goto badWindow; + } + packPtr = GetPacker(tkwin); + + /* + * Process options for this window. + */ + + if (Tcl_ListObjGetElements(interp, objv[1], &optionCount, &options) + != TCL_OK) { + return TCL_ERROR; + } + packPtr->side = TOP; + packPtr->anchor = TK_ANCHOR_CENTER; + packPtr->padX = packPtr->padY = 0; + packPtr->padLeft = packPtr->padTop = 0; + packPtr->iPadX = packPtr->iPadY = 0; + packPtr->flags &= ~(FILLX|FILLY|EXPAND); + packPtr->flags |= OLD_STYLE; + for (index = 0 ; index < optionCount; index++) { + Tcl_Obj *curOptPtr = options[index]; + const char *curOpt = Tcl_GetString(curOptPtr); + size_t length = curOptPtr->length; + + c = curOpt[0]; + + if ((c == 't') + && (strncmp(curOpt, "top", length)) == 0) { + packPtr->side = TOP; + } else if ((c == 'b') + && (strncmp(curOpt, "bottom", length)) == 0) { + packPtr->side = BOTTOM; + } else if ((c == 'l') + && (strncmp(curOpt, "left", length)) == 0) { + packPtr->side = LEFT; + } else if ((c == 'r') + && (strncmp(curOpt, "right", length)) == 0) { + packPtr->side = RIGHT; + } else if ((c == 'e') + && (strncmp(curOpt, "expand", length)) == 0) { + packPtr->flags |= EXPAND; + } else if ((c == 'f') + && (strcmp(curOpt, "fill")) == 0) { + packPtr->flags |= FILLX|FILLY; + } else if ((length == 5) && (strcmp(curOpt, "fillx")) == 0) { + packPtr->flags |= FILLX; + } else if ((length == 5) && (strcmp(curOpt, "filly")) == 0) { + packPtr->flags |= FILLY; + } else if ((c == 'p') && (strcmp(curOpt, "padx")) == 0) { + if (optionCount < (index+2)) { + missingPad: + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "wrong # args: \"%s\" option must be" + " followed by screen distance", curOpt)); + Tcl_SetErrorCode(interp, "TK", "OLDPACK", "BAD_PARAMETER", + NULL); + return TCL_ERROR; + } + if (TkParsePadAmount(interp, tkwin, options[index+1], + &packPtr->padLeft, &packPtr->padX) != TCL_OK) { + return TCL_ERROR; + } + packPtr->padX /= 2; + packPtr->padLeft /= 2; + packPtr->iPadX = 0; + index++; + } else if ((c == 'p') && (strcmp(curOpt, "pady")) == 0) { + if (optionCount < (index+2)) { + goto missingPad; + } + if (TkParsePadAmount(interp, tkwin, options[index+1], + &packPtr->padTop, &packPtr->padY) != TCL_OK) { + return TCL_ERROR; + } + packPtr->padY /= 2; + packPtr->padTop /= 2; + packPtr->iPadY = 0; + index++; + } else if ((c == 'f') && (length > 1) + && (strncmp(curOpt, "frame", (size_t) length) == 0)) { + if (optionCount < (index+2)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "wrong # args: \"frame\"" + " option must be followed by anchor point", -1)); + Tcl_SetErrorCode(interp, "TK", "OLDPACK", "BAD_PARAMETER", + NULL); + return TCL_ERROR; + } + if (Tk_GetAnchorFromObj(interp, options[index+1], + &packPtr->anchor) != TCL_OK) { + return TCL_ERROR; + } + index++; + } else { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "bad option \"%s\": should be top, bottom, left," + " right, expand, fill, fillx, filly, padx, pady, or" + " frame", curOpt)); + Tcl_SetErrorCode(interp, "TK", "OLDPACK", "BAD_PARAMETER", + NULL); + return TCL_ERROR; + } + } + + if (packPtr != prevPtr) { + /* + * Unpack this window if it's currently packed. + */ + + if (packPtr->masterPtr != NULL) { + if ((packPtr->masterPtr != masterPtr) && + (packPtr->masterPtr->tkwin + != Tk_Parent(packPtr->tkwin))) { + Tk_UnmaintainGeometry(packPtr->tkwin, + packPtr->masterPtr->tkwin); + } + Unlink(packPtr); + } + + /* + * Add the window in the correct place in its master's packing + * order, then make sure that the window is managed by us. + */ + + packPtr->masterPtr = masterPtr; + if (prevPtr == NULL) { + packPtr->nextPtr = masterPtr->slavePtr; + masterPtr->slavePtr = packPtr; + } else { + packPtr->nextPtr = prevPtr->nextPtr; + prevPtr->nextPtr = packPtr; + } + Tk_ManageGeometry(tkwin, &packerType, packPtr); + + if (!(masterPtr->flags & DONT_PROPAGATE)) { + if (TkSetGeometryMaster(interp, masterPtr->tkwin, "pack") + != TCL_OK) { + Tk_ManageGeometry(tkwin, NULL, NULL); + Unlink(packPtr); + return TCL_ERROR; + } + masterPtr->flags |= ALLOCED_MASTER; + } + } + } + + /* + * Arrange for the master to be re-packed at the first idle moment. + */ + + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } + if (!(masterPtr->flags & REQUESTED_REPACK)) { + masterPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, masterPtr); + } + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * Unlink -- + * + * Remove a packer from its master's list of slaves. + * + * Results: + * None. + * + * Side effects: + * The master will be scheduled for repacking. + * + *---------------------------------------------------------------------- + */ + +static void +Unlink( + register Packer *packPtr) /* Window to unlink. */ +{ + register Packer *masterPtr, *packPtr2; + + masterPtr = packPtr->masterPtr; + if (masterPtr == NULL) { + return; + } + if (masterPtr->slavePtr == packPtr) { + masterPtr->slavePtr = packPtr->nextPtr; + } else { + for (packPtr2 = masterPtr->slavePtr; ; packPtr2 = packPtr2->nextPtr) { + if (packPtr2 == NULL) { + Tcl_Panic("Unlink couldn't find previous window"); + } + if (packPtr2->nextPtr == packPtr) { + packPtr2->nextPtr = packPtr->nextPtr; + break; + } + } + } + if (!(masterPtr->flags & REQUESTED_REPACK)) { + masterPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, masterPtr); + } + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } + + packPtr->masterPtr = NULL; + + /* + * If we have emptied this master from slaves it means we are no longer + * handling it and should mark it as free. + */ + + if (masterPtr->slavePtr == NULL && masterPtr->flags & ALLOCED_MASTER) { + TkFreeGeometryMaster(masterPtr->tkwin, "pack"); + masterPtr->flags &= ~ALLOCED_MASTER; + } + +} + +/* + *---------------------------------------------------------------------- + * + * DestroyPacker -- + * + * This function is invoked by Tcl_EventuallyFree or Tcl_Release to clean + * up the internal structure of a packer at a safe time (when no-one is + * using it anymore). + * + * Results: + * None. + * + * Side effects: + * Everything associated with the packer is freed up. + * + *---------------------------------------------------------------------- + */ + +static void +DestroyPacker( + void *memPtr) /* Info about packed window that is now + * dead. */ +{ + register Packer *packPtr = memPtr; + + ckfree(packPtr); +} + +/* + *---------------------------------------------------------------------- + * + * PackStructureProc -- + * + * This function is invoked by the Tk event dispatcher in response to + * StructureNotify events. + * + * Results: + * None. + * + * Side effects: + * If a window was just deleted, clean up all its packer-related + * information. If it was just resized, repack its slaves, if any. + * + *---------------------------------------------------------------------- + */ + +static void +PackStructureProc( + ClientData clientData, /* Our information about window referred to by + * eventPtr. */ + XEvent *eventPtr) /* Describes what just happened. */ +{ + register Packer *packPtr = clientData; + + if (eventPtr->type == ConfigureNotify) { + if ((packPtr->slavePtr != NULL) + && !(packPtr->flags & REQUESTED_REPACK)) { + packPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, packPtr); + } + if ((packPtr->masterPtr != NULL) + && (packPtr->doubleBw != 2*Tk_Changes(packPtr->tkwin)->border_width)) { + if (!(packPtr->masterPtr->flags & REQUESTED_REPACK)) { + packPtr->doubleBw = 2*Tk_Changes(packPtr->tkwin)->border_width; + packPtr->masterPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, packPtr->masterPtr); + } + } + } else if (eventPtr->type == DestroyNotify) { + register Packer *slavePtr, *nextPtr; + + if (packPtr->masterPtr != NULL) { + Unlink(packPtr); + } + + for (slavePtr = packPtr->slavePtr; slavePtr != NULL; + slavePtr = nextPtr) { + Tk_ManageGeometry(slavePtr->tkwin, NULL, NULL); + Tk_UnmapWindow(slavePtr->tkwin); + slavePtr->masterPtr = NULL; + nextPtr = slavePtr->nextPtr; + slavePtr->nextPtr = NULL; + } + + if (packPtr->tkwin != NULL) { + TkDisplay *dispPtr = ((TkWindow *) packPtr->tkwin)->dispPtr; + Tcl_DeleteHashEntry(Tcl_FindHashEntry(&dispPtr->packerHashTable, + (char *) packPtr->tkwin)); + } + + if (packPtr->flags & REQUESTED_REPACK) { + Tcl_CancelIdleCall(ArrangePacking, packPtr); + } + packPtr->tkwin = NULL; + Tcl_EventuallyFree(packPtr, (Tcl_FreeProc *) DestroyPacker); + } else if (eventPtr->type == MapNotify) { + /* + * When a master gets mapped, must redo the geometry computation so + * that all of its slaves get remapped. + */ + + if ((packPtr->slavePtr != NULL) + && !(packPtr->flags & REQUESTED_REPACK)) { + packPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, packPtr); + } + } else if (eventPtr->type == UnmapNotify) { + register Packer *packPtr2; + + /* + * Unmap all of the slaves when the master gets unmapped, so that they + * don't bother to keep redisplaying themselves. + */ + + for (packPtr2 = packPtr->slavePtr; packPtr2 != NULL; + packPtr2 = packPtr2->nextPtr) { + Tk_UnmapWindow(packPtr2->tkwin); + } + } +} + +/* + *---------------------------------------------------------------------- + * + * ConfigureSlaves -- + * + * This implements the guts of the "pack configure" command. Given a list + * of slaves and configuration options, it arranges for the packer to + * manage the slaves and sets the specified options. + * + * Results: + * TCL_OK is returned if all went well. Otherwise, TCL_ERROR is returned + * and the interp's result is set to contain an error message. + * + * Side effects: + * Slave windows get taken over by the packer. + * + *---------------------------------------------------------------------- + */ + +static int +ConfigureSlaves( + Tcl_Interp *interp, /* Interpreter for error reporting. */ + Tk_Window tkwin, /* Any window in application containing + * slaves. Used to look up slave names. */ + int objc, /* Number of elements in argv. */ + Tcl_Obj *const objv[]) /* Argument objects: contains one or more + * window names followed by any number of + * "option value" pairs. Caller must make sure + * that there is at least one window name. */ +{ + Packer *masterPtr, *slavePtr, *prevPtr, *otherPtr; + Tk_Window other, slave, parent, ancestor; + int i, j, numWindows, tmp, positionGiven; + const char *string; + static const char *const optionStrings[] = { + "-after", "-anchor", "-before", "-expand", "-fill", + "-in", "-ipadx", "-ipady", "-padx", "-pady", "-side", NULL }; + enum options { + CONF_AFTER, CONF_ANCHOR, CONF_BEFORE, CONF_EXPAND, CONF_FILL, + CONF_IN, CONF_IPADX, CONF_IPADY, CONF_PADX, CONF_PADY, CONF_SIDE }; + int index, side; + + /* + * Find out how many windows are specified. + */ + + for (numWindows = 0; numWindows < objc; numWindows++) { + string = Tcl_GetString(objv[numWindows]); + if (string[0] != '.') { + break; + } + } + + /* + * Iterate over all of the slave windows, parsing the configuration + * options for each slave. It's a bit wasteful to re-parse the options for + * each slave, but things get too messy if we try to parse the arguments + * just once at the beginning. For example, if a slave already is packed + * we want to just change a few existing values without resetting + * everything. If there are multiple windows, the -after, -before, and -in + * options only get processed for the first window. + */ + + masterPtr = NULL; + prevPtr = NULL; + positionGiven = 0; + for (j = 0; j < numWindows; j++) { + if (TkGetWindowFromObj(interp, tkwin, objv[j], &slave) != TCL_OK) { + return TCL_ERROR; + } + if (Tk_TopWinHierarchy(slave)) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't pack \"%s\": it's a top-level window", + Tcl_GetString(objv[j]))); + Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "TOPLEVEL", NULL); + return TCL_ERROR; + } + slavePtr = GetPacker(slave); + slavePtr->flags &= ~OLD_STYLE; + + /* + * If the slave isn't currently packed, reset all of its configuration + * information to default values (there could be old values left from + * a previous packing). + */ + + if (slavePtr->masterPtr == NULL) { + slavePtr->side = TOP; + slavePtr->anchor = TK_ANCHOR_CENTER; + slavePtr->padX = slavePtr->padY = 0; + slavePtr->padLeft = slavePtr->padTop = 0; + slavePtr->iPadX = slavePtr->iPadY = 0; + slavePtr->flags &= ~(FILLX|FILLY|EXPAND); + } + + for (i = numWindows; i < objc; i+=2) { + if ((i+2) > objc) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "extra option \"%s\" (option with no value?)", + Tcl_GetString(objv[i]))); + Tcl_SetErrorCode(interp, "TK", "PACK", "BAD_PARAMETER", NULL); + return TCL_ERROR; + } + if (Tcl_GetIndexFromObjStruct(interp, objv[i], optionStrings, + sizeof(char *), "option", 0, &index) != TCL_OK) { + return TCL_ERROR; + } + + switch ((enum options) index) { + case CONF_AFTER: + if (j == 0) { + if (TkGetWindowFromObj(interp, tkwin, objv[i+1], &other) + != TCL_OK) { + return TCL_ERROR; + } + prevPtr = GetPacker(other); + if (prevPtr->masterPtr == NULL) { + notPacked: + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "window \"%s\" isn't packed", + Tcl_GetString(objv[i+1]))); + Tcl_SetErrorCode(interp, "TK", "PACK", "NOT_PACKED", + NULL); + return TCL_ERROR; + } + masterPtr = prevPtr->masterPtr; + positionGiven = 1; + } + break; + case CONF_ANCHOR: + if (Tk_GetAnchorFromObj(interp, objv[i+1], &slavePtr->anchor) + != TCL_OK) { + return TCL_ERROR; + } + break; + case CONF_BEFORE: + if (j == 0) { + if (TkGetWindowFromObj(interp, tkwin, objv[i+1], &other) + != TCL_OK) { + return TCL_ERROR; + } + otherPtr = GetPacker(other); + if (otherPtr->masterPtr == NULL) { + goto notPacked; + } + masterPtr = otherPtr->masterPtr; + prevPtr = masterPtr->slavePtr; + if (prevPtr == otherPtr) { + prevPtr = NULL; + } else { + while (prevPtr->nextPtr != otherPtr) { + prevPtr = prevPtr->nextPtr; + } + } + positionGiven = 1; + } + break; + case CONF_EXPAND: + if (Tcl_GetBooleanFromObj(interp, objv[i+1], &tmp) != TCL_OK) { + return TCL_ERROR; + } + slavePtr->flags &= ~EXPAND; + if (tmp) { + slavePtr->flags |= EXPAND; + } + break; + case CONF_FILL: + string = Tcl_GetString(objv[i+1]); + if (strcmp(string, "none") == 0) { + slavePtr->flags &= ~(FILLX|FILLY); + } else if (strcmp(string, "x") == 0) { + slavePtr->flags = (slavePtr->flags & ~FILLY) | FILLX; + } else if (strcmp(string, "y") == 0) { + slavePtr->flags = (slavePtr->flags & ~FILLX) | FILLY; + } else if (strcmp(string, "both") == 0) { + slavePtr->flags |= FILLX|FILLY; + } else { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "bad fill style \"%s\": must be " + "none, x, y, or both", string)); + Tcl_SetErrorCode(interp, "TK", "VALUE", "FILL", NULL); + return TCL_ERROR; + } + break; + case CONF_IN: + if (j == 0) { + if (TkGetWindowFromObj(interp, tkwin, objv[i+1], &other) + != TCL_OK) { + return TCL_ERROR; + } + masterPtr = GetPacker(other); + prevPtr = masterPtr->slavePtr; + if (prevPtr != NULL) { + while (prevPtr->nextPtr != NULL) { + prevPtr = prevPtr->nextPtr; + } + } + positionGiven = 1; + } + break; + case CONF_IPADX: + if ((Tk_GetPixelsFromObj(interp, slave, objv[i+1], &tmp) + != TCL_OK) || (tmp < 0)) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "bad ipadx value \"%s\": must be positive screen" + " distance", Tcl_GetString(objv[i+1]))); + Tcl_SetErrorCode(interp, "TK", "VALUE", "INT_PAD", NULL); + return TCL_ERROR; + } + slavePtr->iPadX = tmp * 2; + break; + case CONF_IPADY: + if ((Tk_GetPixelsFromObj(interp, slave, objv[i+1], &tmp) + != TCL_OK) || (tmp < 0)) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "bad ipady value \"%s\": must be positive screen" + " distance", Tcl_GetString(objv[i+1]))); + Tcl_SetErrorCode(interp, "TK", "VALUE", "INT_PAD", NULL); + return TCL_ERROR; + } + slavePtr->iPadY = tmp * 2; + break; + case CONF_PADX: + if (TkParsePadAmount(interp, slave, objv[i+1], + &slavePtr->padLeft, &slavePtr->padX) != TCL_OK) { + return TCL_ERROR; + } + break; + case CONF_PADY: + if (TkParsePadAmount(interp, slave, objv[i+1], + &slavePtr->padTop, &slavePtr->padY) != TCL_OK) { + return TCL_ERROR; + } + break; + case CONF_SIDE: + if (Tcl_GetIndexFromObjStruct(interp, objv[i+1], sideNames, + sizeof(char *), "side", TCL_EXACT, &side) != TCL_OK) { + return TCL_ERROR; + } + slavePtr->side = (Side) side; + break; + } + } + + /* + * If no position in a packing list was specified and the slave is + * already packed, then leave it in its current location in its + * current packing list. + */ + + if (!positionGiven && (slavePtr->masterPtr != NULL)) { + masterPtr = slavePtr->masterPtr; + goto scheduleLayout; + } + + /* + * If the slave is going to be put back after itself or the same -in + * window is passed in again, then just skip the whole operation, + * since it won't work anyway. + */ + + if (prevPtr == slavePtr) { + masterPtr = slavePtr->masterPtr; + goto scheduleLayout; + } + + /* + * If none of the "-in", "-before", or "-after" options has been + * specified, arrange for the slave to go at the end of the order for + * its parent. + */ + + if (!positionGiven) { + masterPtr = GetPacker(Tk_Parent(slave)); + prevPtr = masterPtr->slavePtr; + if (prevPtr != NULL) { + while (prevPtr->nextPtr != NULL) { + prevPtr = prevPtr->nextPtr; + } + } + } + + /* + * Make sure that the slave's parent is either the master or an + * ancestor of the master, and that the master and slave aren't the + * same. + */ + + parent = Tk_Parent(slave); + for (ancestor = masterPtr->tkwin; ; ancestor = Tk_Parent(ancestor)) { + if (ancestor == parent) { + break; + } + if (Tk_TopWinHierarchy(ancestor)) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't pack %s inside %s", Tcl_GetString(objv[j]), + Tk_PathName(masterPtr->tkwin))); + Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "HIERARCHY", NULL); + return TCL_ERROR; + } + } + if (slave == masterPtr->tkwin) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't pack %s inside itself", Tcl_GetString(objv[j]))); + Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "SELF", NULL); + return TCL_ERROR; + } + + /* + * Unpack the slave if it's currently packed, then position it after + * prevPtr. + */ + + if (slavePtr->masterPtr != NULL) { + if ((slavePtr->masterPtr != masterPtr) && + (slavePtr->masterPtr->tkwin + != Tk_Parent(slavePtr->tkwin))) { + Tk_UnmaintainGeometry(slavePtr->tkwin, + slavePtr->masterPtr->tkwin); + } + Unlink(slavePtr); + } + + slavePtr->masterPtr = masterPtr; + if (prevPtr == NULL) { + slavePtr->nextPtr = masterPtr->slavePtr; + masterPtr->slavePtr = slavePtr; + } else { + slavePtr->nextPtr = prevPtr->nextPtr; + prevPtr->nextPtr = slavePtr; + } + Tk_ManageGeometry(slave, &packerType, slavePtr); + prevPtr = slavePtr; + + if (!(masterPtr->flags & DONT_PROPAGATE)) { + if (TkSetGeometryMaster(interp, masterPtr->tkwin, "pack") + != TCL_OK) { + Tk_ManageGeometry(slave, NULL, NULL); + Unlink(slavePtr); + return TCL_ERROR; + } + masterPtr->flags |= ALLOCED_MASTER; + } + + /* + * Arrange for the master to be re-packed at the first idle moment. + */ + + scheduleLayout: + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } + if (!(masterPtr->flags & REQUESTED_REPACK)) { + masterPtr->flags |= REQUESTED_REPACK; + Tcl_DoWhenIdle(ArrangePacking, masterPtr); + } + } + return TCL_OK; +} + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |