/* $Header$ */ /* * 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. * * RCS: @(#) $Id: tkgrid.c,v 1.1.1.1 2001/06/13 05:02:05 dtashley Exp $ */ #include "tkInt.h" /* * 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 /* * 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 */ char buf[TCL_INTEGER_SPACE * 4]; 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) { Tcl_SetResult(interp, "0 0 0 0", TCL_STATIC); return(TCL_OK); } SetGridSize(masterPtr); endX = MAX(gridPtr->columnEnd, gridPtr->columnMax); endY = MAX(gridPtr->rowEnd, gridPtr->rowMax); if ((endX == 0) || (endY == 0)) { Tcl_SetResult(interp, "0 0 0 0", TCL_STATIC); 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(buf, "%d %d %d %d", x + gridPtr->startX, y + gridPtr->startY, width, height); Tcl_SetResult(interp, buf, TCL_VOLATILE); } 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; if (slavePtr->flags & REQUESTED_RELAYOUT) { Tcl_CancelIdleCall(ArrangeGrid, (ClientData) slavePtr); } 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[64 + TCL_INTEGER_SPACE * 4]; 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) { Tcl_ResetResult(interp); return TCL_OK; } Tcl_AppendElement(interp, "-in"); Tcl_AppendElement(interp, Tk_PathName(slavePtr->masterPtr->tkwin)); sprintf(buffer, " -column %d -row %d -columnspan %d -rowspan %d", slavePtr->column, slavePtr->row, slavePtr->numCols, slavePtr->numRows); Tcl_AppendResult(interp, buffer, (char *) NULL); sprintf(buffer, " -ipadx %d -ipady %d -padx %d -pady %d", slavePtr->iPadX/2, slavePtr->iPadY/2, slavePtr->padX/2, slavePtr->padY/2); Tcl_AppendResult(interp, buffer, (char *) NULL); StickyToString(slavePtr->sticky,buffer); Tcl_AppendResult(interp, " -sticky ", buffer, (char *) NULL); } 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 */ char buf[TCL_INTEGER_SPACE * 2]; 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) { Tcl_SetResult(interp, "-1 -1", TCL_STATIC); 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) { Tcl_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(buf, "%d %d", i, j); Tcl_SetResult(interp, buf, TCL_VOLATILE); } 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) { Tcl_SetResult(interp, ((masterPtr->flags & DONT_PROPAGATE) ? "0" : "1"), TCL_STATIC); return TCL_OK; } if (Tcl_GetBoolean(interp, argv[3], &propagate) != TCL_OK) { return TCL_ERROR; } /* Only request a relayout if the propagation bit changes */ if ((!propagate) ^ (masterPtr->flags&DONT_PROPAGATE)) { if (propagate) { masterPtr->flags &= ~DONT_PROPAGATE; } else { 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) { char buf[TCL_INTEGER_SPACE * 2]; SetGridSize(masterPtr); gridPtr = masterPtr->masterDataPtr; sprintf(buf, "%d %d", MAX(gridPtr->columnEnd, gridPtr->columnMax), MAX(gridPtr->rowEnd, gridPtr->rowMax)); Tcl_SetResult(interp, buf, TCL_VOLATILE); } else { Tcl_SetResult(interp, "0 0", TCL_STATIC); } } 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; islavePtr; 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)); } /* * Sample argument combinations: * grid columnconfigure -option * grid columnconfigure -option value -option value * grid rowconfigure * grid rowconfigure -option * grid rowconfigure -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)) { char buf[64 + TCL_INTEGER_SPACE * 3]; sprintf(buf, "-minsize %d -pad %d -weight %d", slotPtr[slot].minSize,slotPtr[slot].pad, slotPtr[slot].weight); Tcl_SetResult(interp, buf, TCL_VOLATILE); return (TCL_OK); } else if (argc == 4) { Tcl_SetResult(interp, "-minsize 0 -pad 0 -weight 0", TCL_STATIC); 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; imasterDataPtr->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 *) ckalloc(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 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; end0) && (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 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; TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; if (!dispPtr->gridInit) { Tcl_InitHashTable(&dispPtr->gridHashTable, TCL_ONE_WORD_KEYS); dispPtr->gridInit = 1; } /* * See if there's already grid for this window. If not, * then create a new one. */ hPtr = Tcl_CreateHashEntry(&dispPtr->gridHashTable, (char *) tkwin, &new); if (!new) { return (Gridder *) Tcl_GetHashValue(hPtr); } gridPtr = (Gridder *) ckalloc(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 *) ckalloc(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 *) ckalloc(sizeof(GridMaster)); size = sizeof(SlotInfo) * TYPICAL_SIZE; gridPtr->columnEnd = 0; gridPtr->columnMax = 0; gridPtr->columnPtr = (SlotInfo *) ckalloc(size); gridPtr->columnSpace = TYPICAL_SIZE; gridPtr->rowEnd = 0; gridPtr->rowMax = 0; gridPtr->rowPtr = (SlotInfo *) ckalloc(size); gridPtr->rowSpace = TYPICAL_SIZE; gridPtr->startX = 0; gridPtr->startY = 0; 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 Tcl_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; TkDisplay *dispPtr = ((TkWindow *) gridPtr->tkwin)->dispPtr; 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(&dispPtr->gridHashTable, (char *) gridPtr->tkwin)); if (gridPtr->flags & REQUESTED_RELAYOUT) { Tcl_CancelIdleCall(ArrangeGrid, (ClientData) gridPtr); } gridPtr->tkwin = NULL; Tcl_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 the interp's 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 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) { Tcl_SetResult(interp, "Window can't be managed in itself", TCL_STATIC); 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; } /* Count the number of consecutive ^'s starting from this position */ 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 - 2; } else { lastRow = 0; } lastColumn = 0; } else { other = Tk_NameToWindow(interp, lastWindow, tkwin); otherPtr = GetGrid(other); lastRow = otherPtr->row + otherPtr->numRows - 2; lastColumn = otherPtr->column + otherPtr->numCols; } for (match=0, slavePtr = masterPtr->slavePtr; slavePtr != NULL; slavePtr = slavePtr->nextPtr) { if (slavePtr->column == lastColumn && slavePtr->row + slavePtr->numRows - 1 == lastRow) { if (slavePtr->numCols <= width) { slavePtr->numRows++; match++; j += slavePtr->numCols - 1; lastWindow = Tk_PathName(slavePtr->tkwin); break; } } } 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; 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'; } if (count) { result[count] = '\0'; } else { sprintf(result,"{}"); } } /* *---------------------------------------------------------------------- * * 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; } /* End of tkgrid.c */