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-
-/* $Id: tixGrData.h,v 1.1.1.1 2000/05/17 11:08:42 idiscovery Exp $ */
-
-/*
- * tixGData.h --
- *
- * Defines portable data structure for tixGrid.
- *
- * Copyright (c) 1996, Expert Interface Technologies
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- */
-
-#ifndef _TIX_GRID_DATA_H_
-#define _TIX_GRID_DATA_H_
-
-/*
- * Data structure that stored the cells in a Grid widget. It is optimized
- * for column/row insertion and deletion.
- *
- * - A grid is divideded into a set of rows and columns. Each row and column
- * is divided into a set of cells.
- *
- * - The following discusses the structure of a row. The structure of a
- * column is the reverse of a row.
- *
- * Row y is stored in the hash table TixGridDataSet.index[1] with
- * the index y. Hence, to search for row y, we use the FindHashEntry
- * operation:
- *
- * row_y = TixGridDataSet.index[1].FindHashEntry(y);
- *
- * To locate a cell (x,y), we can first find the row y, and then
- * locate the cell at column x of this row. Note that the cell is
- * *not* indexed by its column position (y), but rather by the hash
- * table of the column y. The following example illustrates how cell
- * (x,y) can be searched:
- *
- * row_y = TixGridDataSet.index[1].FindHashEntry(y);
- * col_x = TixGridDataSet.index[0].FindHashEntry(x);
- *
- * cell_xy = row_x.list.FindHashEntry(&col_x);
- *
- * The advantage of this arrangement is it is very efficient to
- * insert a row into into the grid -- we just have to fix the
- * indices of the rows table. For example, if, after the insertion,
- * row_y is now moved to the row y1, we change its index from y to
- * y1. In general, an insertion operation takes log(n) time in a
- * grid that contains n items.
- *
- */
-typedef struct TixGridDataSet {
- Tcl_HashTable index[2]; /* the row and column indices */
- /* index[0] holds the columns
- * (horizontal index)
- */
- int maxIdx[2]; /* the max row/col, or {-1,-1}
- * if there are no rows/col
- */
-} TixGridDataSet;
-
-#define TIX_GR_AUTO 0
-#define TIX_GR_DEFAULT 1
-#define TIX_GR_DEFINED_PIXEL 2
-#define TIX_GR_DEFINED_CHAR 3
-
-typedef struct TixGridSize {
- int sizeType;
- int sizeValue; /* width or height */
- int pixels;
- int pad0, pad1;
- double charValue;
-} TixGridSize;
-
-typedef struct TixGridRowCol {
- /* private: */
- Tcl_HashTable table;
-
- /* public: */
- int dispIndex; /* the row or column in which
- * this TixGridRowCol is displayed */
- TixGridSize size;
-} TixGridRowCol;
-
-
-#endif