/*
 * Copyright(c) 1992 Bell Communications Research, Inc. (Bellcore)
 * Copyright(c) 1995-99 Andrew Lister
 *                        All rights reserved
 * Permission to use, copy, modify and distribute this material for
 * any purpose and without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all
 * copies, and that the name of Bellcore not be used in advertising
 * or publicity pertaining to this material without the specific,
 * prior written permission of an authorized representative of
 * Bellcore.
 *
 * BELLCORE MAKES NO REPRESENTATIONS AND EXTENDS NO WARRANTIES, EX-
 * PRESS OR IMPLIED, WITH RESPECT TO THE SOFTWARE, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR ANY PARTICULAR PURPOSE, AND THE WARRANTY AGAINST IN-
 * FRINGEMENT OF PATENTS OR OTHER INTELLECTUAL PROPERTY RIGHTS.  THE
 * SOFTWARE IS PROVIDED "AS IS", AND IN NO EVENT SHALL BELLCORE OR
 * ANY OF ITS AFFILIATES BE LIABLE FOR ANY DAMAGES, INCLUDING ANY
 * LOST PROFITS OR OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES RELAT-
 * ING TO THE SOFTWARE.
 *
 * $Id: Shadow.c,v 1.1 1999/08/04 19:47:01 danny Exp $
 */


/*
 * Shadow.c created by Andrew Lister (30 October, 1995)
 */


#ifdef HAVE_CONFIG_H
#include <XbaeConfig.h>
#endif

#include <Xm/Xm.h>
#include <Xm/XmP.h>
#if XmVersion > 1001
#include <Xm/DrawP.h>
#endif
#include <Xbae/MatrixP.h>
#include <Xbae/Shadow.h>
#include <Xbae/Draw.h>
#include <Xbae/Utils.h>

static void DrawRowShadow P((XbaeMatrixWidget, Window, int, int, int,
			     int, int, int, GC, GC));

static void DrawColumnShadow P((XbaeMatrixWidget, Window, int, int, int,
				int, int, int, GC, GC));

static void DrawRowHighlight P((XbaeMatrixWidget, Window, GC, int, int,
				 int, int, int, int, int));
static void DrawColumnHighlight P((XbaeMatrixWidget, Window, GC, int,
				    int, int, int, int, int, int));

void
#if NeedFunctionPrototypes
xbaeDrawCellShadow(XbaeMatrixWidget mw, Window win, int row, int column, int x,
		   int y, int width, int height, Boolean label,
		   Boolean clipped, Boolean pressed)
#else
xbaeDrawCellShadow(mw, win, row, column, x, y, width, height, label, clipped,
		   pressed)
XbaeMatrixWidget mw;
Window win;
int row;
int column;
int x;
int y;
int width;
int height;
Boolean label;
Boolean clipped;
Boolean pressed;
#endif
{
    unsigned char grid_type;
    unsigned char shadow;
    
    if ((mw->matrix.cell_shadow_thickness == 0) &&
	(!IN_GRID_ROW_MODE(mw)) && (!IN_GRID_COLUMN_MODE(mw)))
	return;

    /*
     * Surround the cell with a shadow.
     */
    if(label)
    {
	shadow = pressed ? XmSHADOW_IN : XmSHADOW_OUT;
	grid_type = XmGRID_CELL_SHADOW;
    }
    else
    {
	shadow = mw->matrix.cell_shadow_types ?
	    mw->matrix.cell_shadow_types[row][column] :
	    mw->matrix.cell_shadow_type;
	grid_type = mw->matrix.grid_type;
    }
	
    if (clipped)
    {
	switch (grid_type)
	{
	    case XmGRID_CELL_SHADOW:
		DRAW_SHADOW(XtDisplay(mw), win,
			    mw->matrix.cell_top_shadow_clip_gc,
			    mw->matrix.cell_bottom_shadow_clip_gc,
			    mw->matrix.cell_shadow_thickness,
			    x, y, width, height, shadow);
		break;

	    /* Deprecated types. To be removed in next version. */
	    case XmGRID_SHADOW_OUT:
		DRAW_SHADOW(XtDisplay(mw), win,
			    mw->matrix.cell_bottom_shadow_clip_gc,
			    mw->matrix.cell_top_shadow_clip_gc,
			    mw->matrix.cell_shadow_thickness,
			    x, y, width, height, shadow);
		break;
	    case XmGRID_SHADOW_IN:
		DRAW_SHADOW(XtDisplay(mw), win,
			    mw->matrix.cell_top_shadow_clip_gc,
			    mw->matrix.cell_bottom_shadow_clip_gc,
			    mw->matrix.cell_shadow_thickness,
			    x, y, width, height, shadow);
		break;
	}
    }
    else
    {
	switch (grid_type)
	{
	case XmGRID_NONE:
	    break;
	case XmGRID_ROW_SHADOW:
	    DrawRowShadow(mw, win, row, column, x, y, width, height,
			  mw->manager.top_shadow_GC,
			  mw->manager.bottom_shadow_GC);
	    break;
	case XmGRID_ROW_LINE:
	    DrawRowShadow(mw, win, row, column, x, y, width, height,
			  mw->matrix.grid_line_gc, mw->matrix.grid_line_gc);
	    break;
	case XmGRID_COLUMN_SHADOW:
	    DrawColumnShadow(mw, win, row, column, x, y, width, height,
			     mw->manager.top_shadow_GC,
			     mw->manager.bottom_shadow_GC);
	    break;
	case XmGRID_COLUMN_LINE:
	    DrawColumnShadow(mw, win, row, column, x, y, width, height,
			     mw->matrix.grid_line_gc, mw->matrix.grid_line_gc);
	    break;
	case XmGRID_CELL_LINE:
	    DRAW_SHADOW(XtDisplay(mw), win,
			mw->matrix.grid_line_gc,
			mw->matrix.grid_line_gc,
			mw->matrix.cell_shadow_thickness,
			x, y, width, height, shadow);
	    break;
	case XmGRID_CELL_SHADOW:
	    DRAW_SHADOW(XtDisplay(mw), win,
			mw->manager.top_shadow_GC,
			mw->manager.bottom_shadow_GC,
			mw->matrix.cell_shadow_thickness,
			x, y, width, height, shadow);
	    break;

	/* Deprecated types. To be removed in next version. */
	case XmGRID_LINE:
	    DRAW_SHADOW(XtDisplay(mw), win,
			mw->matrix.grid_line_gc,
			mw->matrix.grid_line_gc,
			mw->matrix.cell_shadow_thickness,
			x, y, width, height, shadow);
	    break;
	case XmGRID_SHADOW_OUT:
	    DRAW_SHADOW(XtDisplay(mw), win,
			mw->manager.bottom_shadow_GC,
			mw->manager.top_shadow_GC,
			mw->matrix.cell_shadow_thickness,
			x, y, width, height, shadow);
	    break;
	case XmGRID_SHADOW_IN:
	    DRAW_SHADOW(XtDisplay(mw), win,
			mw->manager.top_shadow_GC,
			mw->manager.bottom_shadow_GC,
			mw->matrix.cell_shadow_thickness,
			x, y, width, height, shadow);
	    break;
	}
    }    
}

#if XmVersion >= 1002
void
xbaeDrawCellHighlight(mw, win, gc, row, column, x, y, width, height, reason)
XbaeMatrixWidget mw;
Window win;
GC gc;
int row;
int column;
int x;
int y;
int width;
int height;
int reason;
{    
    int thick;

    if (!mw->matrix.highlighted_cells) /* Just a precaution */
	return;

    if (!mw->matrix.highlighted_cells[row][column])
	return;			/* Nothing to do! */

    if (reason & HIGHLIGHTING_SOMETHING)
	gc = mw->manager.highlight_GC;

    if (IN_GRID_ROW_MODE(mw) &&
	(reason & HighlightRow || reason & UnhighlightRow) &&
	mw->matrix.highlighted_cells[row][column] == HighlightRow)
	DrawRowHighlight(mw, win, gc, row, column, x, y, width, height,
			 reason);
    else if (IN_GRID_COLUMN_MODE(mw) &&
	     (reason & HighlightColumn || reason & UnhighlightColumn) &&
	mw->matrix.highlighted_cells[row][column] == HighlightColumn)
	DrawColumnHighlight(mw, win, gc, row, column, x, y, width, height,
			    reason);
    else
    {
	thick = (2 * mw->matrix.cell_shadow_thickness);

	DRAW_HIGHLIGHT(XtDisplay(mw), win, gc,
			x + mw->matrix.cell_shadow_thickness,
			y + mw->matrix.cell_shadow_thickness,
			width - thick, height - thick,
			mw->matrix.cell_highlight_thickness,
			LineSolid);
    }
}

static void
DrawRowHighlight(mw, win, gc, row, column, x, y, width, height, reason)
XbaeMatrixWidget mw;
Window win;
GC gc;
int row;
int column;
int x;
int y;
int width;
int height;
int reason;
{    
    XRectangle rect[1];
    
    rect[0].x = 0;
    rect[0].y = 0;
    rect[0].width = width;
    rect[0].height = height;

    XSetClipRectangles(XtDisplay(mw), gc, x, y, rect, 1, Unsorted);

    y += mw->matrix.cell_shadow_thickness;
    height -= 2 * mw->matrix.cell_shadow_thickness;

    if (column != mw->matrix.columns - 1)
    {
	if (column != 0)
	    x -= (mw->matrix.cell_shadow_thickness +
		mw->matrix.cell_highlight_thickness);
	else
	    x += mw->matrix.cell_shadow_thickness;
	DRAW_HIGHLIGHT(XtDisplay(mw), win, gc, x, y, mw->core.width, height,
			mw->matrix.cell_highlight_thickness,
			LineSolid);
    }
    else
    {
	if (NEED_HORIZ_FILL(mw))
	    width = mw->core.width;
	
	x -= (mw->matrix.cell_shadow_thickness +
	      mw->matrix.cell_highlight_thickness);
	width += mw->matrix.cell_highlight_thickness;

	DRAW_HIGHLIGHT(XtDisplay(mw), win, gc, x, y, width,
			height, mw->matrix.cell_highlight_thickness,
			LineSolid);

	if (NEED_HORIZ_FILL(mw))
	{
	    int ax, ay;

	    xbaeCalcHorizFill(mw, win, x, y, row, column, &ax, &ay,
			      &width, &height);
	    rect[0].width = width;
	    rect[0].height = height;
	    XSetClipRectangles(XtDisplay(mw), gc, ax, ay, rect, 1,
			       Unsorted);
	    height -= mw->matrix.cell_shadow_thickness * 2;
	    ax -= mw->matrix.cell_highlight_thickness;
	    width += (mw->matrix.cell_highlight_thickness -
		      mw->matrix.cell_shadow_thickness);
		
	    DRAW_HIGHLIGHT(XtDisplay(mw), XtWindow(mw), gc, ax, ay,
			    width, height,
			    mw->matrix.cell_highlight_thickness,
			    LineSolid);
	}
    }
    XSetClipMask(XtDisplay(mw), gc, None);
}

static void
DrawColumnHighlight(mw, win, gc, row, column, x, y, width, height, reason)
XbaeMatrixWidget mw;
Window win;
GC gc;
int row;
int column;
int x;
int y;
int width;
int height;
int reason;
{    
    XRectangle rect[1];
    int vert_dead_space_height = VERT_DEAD_SPACE_HEIGHT(mw);
    int clip_vert_visible_space = CLIP_VERT_VISIBLE_SPACE(mw);
    int vert_sb_height = VERT_SB_HEIGHT(mw);
    Boolean need_vert_dead_space_fill = NEED_VERT_DEAD_SPACE_FILL(mw);

    /* This adjustment takes care of that little open area
     * between the last nonfixed row and the first trailing
     * fixed row when the matrix is smaller than its max height */
    if ((vert_dead_space_height == 0) &&
	((TRAILING_VERT_ORIGIN(mw) - 1) == row) &&
	(vert_sb_height < clip_vert_visible_space))
	height += (mw->matrix.cell_shadow_thickness +
		    clip_vert_visible_space - vert_sb_height);

    rect[0].x = 0;
    rect[0].y = 0;
    rect[0].width = width;
    rect[0].height = height;

    XSetClipRectangles(XtDisplay(mw), gc, x, y, rect, 1, Unsorted);

    x += mw->matrix.cell_shadow_thickness;
    width -= 2 * mw->matrix.cell_shadow_thickness;

    if (row != mw->matrix.rows - 1)
    {
	if (row != 0)
	    y -= (mw->matrix.cell_shadow_thickness +
		  mw->matrix.cell_highlight_thickness);
	else
	    y += mw->matrix.cell_shadow_thickness;
	DRAW_HIGHLIGHT(XtDisplay(mw), win, gc, x, y, width, mw->core.height,
			mw->matrix.cell_highlight_thickness,
			LineSolid);
    }
    else
    {
	if (NEED_VERT_FILL(mw) && (! HAS_ATTACHED_TRAILING_ROWS(mw)))
	    height = mw->core.height;
	else
	    height += mw->matrix.cell_highlight_thickness;
	
	y -= (mw->matrix.cell_shadow_thickness +
	      mw->matrix.cell_highlight_thickness);
	
	DRAW_HIGHLIGHT(XtDisplay(mw), win, gc, x, y, width,
			height, mw->matrix.cell_highlight_thickness,
			LineSolid);

	if (NEED_VERT_FILL(mw) || need_vert_dead_space_fill)
	{
	    int ax, ay;

	    xbaeCalcVertFill(mw, win, x, y, row, column, &ax, &ay,
			     &width, &height);
	    
	    /* If we're filling the dead space, then we only use
	     * the width and ax from above call. */
	    if (need_vert_dead_space_fill)
	    {
		ay = UNATTACHED_TRAILING_ROWS_OFFSET(mw);
		height = mw->matrix.cell_shadow_thickness +
		    mw->matrix.cell_highlight_thickness +
		    vert_dead_space_height;
	    }

	    rect[0].width = width;
	    rect[0].height = height;
	    XSetClipRectangles(XtDisplay(mw), gc, ax, ay, rect, 1,
			       Unsorted);
	    width -= mw->matrix.cell_shadow_thickness * 2;
	    ay -= mw->matrix.cell_highlight_thickness;
	    height += (mw->matrix.cell_highlight_thickness -
		       mw->matrix.cell_shadow_thickness);
		
	    /* Make sure height extends past bottom clip */
	    if (need_vert_dead_space_fill && IS_FIXED_COLUMN(mw, column))
		height += (mw->matrix.cell_shadow_thickness +
			   mw->matrix.cell_highlight_thickness);

	    DRAW_HIGHLIGHT(XtDisplay(mw), XtWindow(mw), gc, ax, ay,
			    width, height,
			    mw->matrix.cell_highlight_thickness,
			    LineSolid);
	}
    }
    XSetClipMask(XtDisplay(mw), gc, None);
}

#endif

static void
DrawRowShadow(mw, win, row, column, x, y, width, height, topGC, bottomGC)
XbaeMatrixWidget mw;
Window win;
int row;
int column;
int x;
int y;
int width;
int height;
GC  topGC;
GC  bottomGC;
{
    XRectangle rect[1];
    unsigned char shadow = mw->matrix.row_shadow_types ?
	mw->matrix.row_shadow_types[row] : mw->matrix.cell_shadow_type;

    rect[0].x = 0;
    rect[0].y = 0;
    rect[0].width = width;
    rect[0].height = height;

    /*
     * Set up the clipping rectangle to be only over the current cell
     */
    XSetClipRectangles(XtDisplay(mw),
		       topGC,
		       x, y, rect, 1, Unsorted);
    if (topGC != bottomGC)
	XSetClipRectangles(XtDisplay(mw),
			   bottomGC,
			   x, y, rect, 1, Unsorted);
    /*
     * Now, convert our coordinates to what we need to draw
     */
    if (column != mw->matrix.columns - 1)
    {
	/*
	 * If column is 0, then we need to show the left hand side of the
	 * box, otherwise just draw the edges outside the clipping rectangle
	 */
	width = mw->core.width;
	if (column != 0)
	    x -= mw->matrix.cell_shadow_thickness;

	DRAW_SHADOW(XtDisplay(mw), win,
		    topGC, bottomGC,
		    mw->matrix.cell_shadow_thickness,
		    x, y, width, height, shadow);
    }
    else
    {
	if (NEED_HORIZ_FILL(mw))
	    /*
	     * If we are going to fill, the right hand side of the shadow
	     * shouldn't be drawn - we'll do it later!
	     */
	    width = mw->core.width;
	else
	    width += mw->matrix.cell_shadow_thickness;

	DRAW_SHADOW(XtDisplay(mw), win,
		    topGC, bottomGC,
		    mw->matrix.cell_shadow_thickness,
		    x - mw->matrix.cell_shadow_thickness, y, width,
		    height, shadow);

	if (NEED_HORIZ_FILL(mw))
	{
	    /*
	     * The filled part is drawn on the matrix's window so we need to
	     * do a bit of extra work.
	     */
	    int ax, ay;

	    xbaeCalcHorizFill(mw, win, x, y, row, column, &ax, &ay,
			      &width, &height);
	    
	    rect[0].width = width;
	    rect[0].height = height;

	    XSetClipRectangles(XtDisplay(mw),
			       topGC,
			       ax, ay, rect, 1, Unsorted);
	    if (topGC != bottomGC)
		XSetClipRectangles(XtDisplay(mw),
				   bottomGC,
				   ax, ay, rect, 1, Unsorted);
 	    
	    /*
	     * Final tweaks. Note that these _cannot_ be part of the calc
	     * horiz fill logic, since that is used to set the clipping
	     * rectangle
	     */

	    if ((win == XtWindow(ClipChild(mw))) &&
		(height != ROW_HEIGHT(mw)))
	    {
		if (height == (ClipChild(mw)->core.height +
			       ClipChild(mw)->core.y - ay))
		    height += mw->matrix.cell_shadow_thickness;

		if (ay == ClipChild(mw)->core.y)
		{
		    height += mw->matrix.cell_shadow_thickness;
		    ay -= mw->matrix.cell_shadow_thickness;
		}
	    }

	    /* Do same check for RightClip. Now, why this is even
	     * necessary when we're drawing on the Matrix's window,
	     * I dunno. This one is only necessary when
	     * we've got trailing fixed columns. */
	    if (mw->matrix.trailing_fixed_columns &&
		(win == XtWindow(RightClip(mw))) &&
		(height != ROW_HEIGHT(mw)))
	    {
		if (height == (RightClip(mw)->core.height +
			       RightClip(mw)->core.y - ay))
		    height += mw->matrix.cell_shadow_thickness;

		if (ay == RightClip(mw)->core.y)
		{
		    height += mw->matrix.cell_shadow_thickness;
		    ay -= mw->matrix.cell_shadow_thickness;
		}
	    }
	    
	    /*
	     * Draw the remaining shadow directly onto the matrix window
	     */
	    DRAW_SHADOW(XtDisplay(mw), XtWindow(mw),
			topGC, bottomGC,
			mw->matrix.cell_shadow_thickness,
			ax - mw->matrix.cell_shadow_thickness,
			ay, width + mw->matrix.cell_shadow_thickness,
			height, shadow);
	}
    }
    /*
     * Reset our GC's clip mask
     */
    XSetClipMask(XtDisplay(mw), topGC,
		 None);
    if (topGC != bottomGC)
	XSetClipMask(XtDisplay(mw), bottomGC,
		     None);
}

static void
DrawColumnShadow(mw, win, row, column, x, y, width, height, topGC, bottomGC)
XbaeMatrixWidget mw;
Window win;
int row;
int column;
int x;
int y;
int width;
int height;
GC  topGC;
GC  bottomGC;
{
    XRectangle rect[1];
    unsigned char shadow = mw->matrix.column_shadow_types ?
	mw->matrix.column_shadow_types[column] : mw->matrix.cell_shadow_type;
    int vert_dead_space_height = VERT_DEAD_SPACE_HEIGHT(mw);
    int clip_vert_visible_space = CLIP_VERT_VISIBLE_SPACE(mw);
    int vert_sb_height = VERT_SB_HEIGHT(mw);
    Boolean need_vert_dead_space_fill = NEED_VERT_DEAD_SPACE_FILL(mw);

    /* This adjustment takes care of that little open area
     * between the last nonfixed row and the first trailing
     * fixed row when the matrix is smaller than its max height */
    if ((vert_dead_space_height == 0) &&
	((TRAILING_VERT_ORIGIN(mw) - 1) == row) &&
	(vert_sb_height < clip_vert_visible_space))
	height += (mw->matrix.cell_shadow_thickness +
		    clip_vert_visible_space - vert_sb_height);

    rect[0].x = 0;
    rect[0].y = 0;
    rect[0].width = width;
    rect[0].height = height;

    /*
     * Set up the clipping rectangle to be only over the current cell
     */
    XSetClipRectangles(XtDisplay(mw),
		       topGC,
		       x, y, rect, 1, Unsorted);
    if (topGC != bottomGC)
	XSetClipRectangles(XtDisplay(mw),
			   bottomGC,
			   x, y, rect, 1, Unsorted);
    /*
     * Now, convert our coordinates to what we need to draw
     */
    if (row != mw->matrix.rows - 1)
    {
	/*
	 * If column is 0, then we need to show the left hand side of the
	 * box, otherwise just draw the edges outside the clipping rectangle
	 */
	height = mw->core.height;
	if (row != 0)
	    y -= mw->matrix.cell_shadow_thickness;

	DRAW_SHADOW(XtDisplay(mw), win,
		    topGC, bottomGC,
		    mw->matrix.cell_shadow_thickness,
		    x, y, width, height, shadow);
    }
    else
    {
	if (NEED_VERT_FILL(mw) && (! HAS_ATTACHED_TRAILING_ROWS(mw)))
	    /*
	     * If we are going to fill, the bottom of the shadow
	     * shouldn't be drawn
	     */
	    height = mw->core.height;
	else
	    height += mw->matrix.cell_shadow_thickness;

	DRAW_SHADOW(XtDisplay(mw), win,
		    topGC, bottomGC,
		    mw->matrix.cell_shadow_thickness,
		    x, y - mw->matrix.cell_shadow_thickness,
		    width, height, shadow);

	/*
	 * The filled part is drawn on the matrix's window so we need to
	 * do a bit of extra work. We may need to fill either the entire
	 * bottom portion of the matrix, or the dead space, that is, the
	 * space between the last nonfixed row and the first trailing
	 * fixed row. We only need to do the latter case when we've got
	 * bottom attached trailing fixed rows with vertical dead space
	 * (vertical dead space only occurs when the matrix is bigger
	 * than its maximum height, i.e., we're filling).
	 */
	if (NEED_VERT_FILL(mw) || need_vert_dead_space_fill)
	{
	    int ax, ay;
	    
	    xbaeCalcVertFill(mw, win, x, y, row, column, &ax, &ay,
			     &width, &height);

	    /* If we're filling the dead space, then we only use
	     * the width and ax from above call. */
	    if (need_vert_dead_space_fill)
	    {
		ay = UNATTACHED_TRAILING_ROWS_OFFSET(mw);
		height = mw->matrix.cell_shadow_thickness +
		    vert_dead_space_height;
	    }

	    rect[0].width = width;
	    rect[0].height = height;

	    XSetClipRectangles(XtDisplay(mw),
			       topGC,
			       ax, ay, rect, 1, Unsorted);
	    if (topGC != bottomGC)
		XSetClipRectangles(XtDisplay(mw),
				   bottomGC,
				   ax, ay, rect, 1, Unsorted);
 
 	    /*
	     * Final tweaks. Note that these _cannot_ be part of the
	     * calc vert fill logic, since that is used to set the
	     * clipping rectangle
	     */
 	    
 	    if ((win == XtWindow(ClipChild(mw))) &&
		(width != COLUMN_WIDTH(mw, column)))
 	    {
 		/* Make sure we don't draw a shadow along the matrix's
		 * shadow by extending our width past the edge of the
		 * clipping rectangle
		 */
 		if (width == (ClipChild(mw)->core.width +
			      ClipChild(mw)->core.x - ax))
 		    width += mw->matrix.cell_shadow_thickness;
 
 		/*
		 * Make sure the shadow doesn't get drawn along the left
		 * side by moving the x pos outside the clipping
		 * rectangle.
		 */
 		if (ax == ClipChild(mw)->core.x)
 		{
 		    width += mw->matrix.cell_shadow_thickness;
 		    ax -= mw->matrix.cell_shadow_thickness;
 		}
 	    }
 
 	    /*
	     * Do same check for BottomClip. Now, why this is even
	     * necessary when we're drawing on the Matrix's window,
	     * I dunno. This one is only necessary when we've got
	     * trailing fixed rows.
	     */
 	    if (mw->matrix.trailing_fixed_rows &&
 		(win == XtWindow(BottomClip(mw))) &&
		(width != COLUMN_WIDTH(mw, column)))
 	    {
 		if (width == (BottomClip(mw)->core.width +
			      BottomClip(mw)->core.x - ax))
 		    width += mw->matrix.cell_shadow_thickness;
 
 		if (ax == BottomClip(mw)->core.x)
 		{
 		    width += mw->matrix.cell_shadow_thickness;
 		    ax -= mw->matrix.cell_shadow_thickness;
 		}
	    }

	    /* Make sure height extends past bottom clip */
	    if (need_vert_dead_space_fill && IS_FIXED_COLUMN(mw, column))
		height += mw->matrix.cell_shadow_thickness;
 
	    /*
	     * Draw the remaining shadow directly onto the matrix window
	     */
	    DRAW_SHADOW(XtDisplay(mw), XtWindow(mw),
			topGC, bottomGC,
			mw->matrix.cell_shadow_thickness,
			ax, ay - mw->matrix.cell_shadow_thickness,
			width, height + mw->matrix.cell_shadow_thickness,
			shadow);
	}
    }

    /*
     * Reset our GC's clip mask
     */
    XSetClipMask(XtDisplay(mw), topGC,
		 None);
    if (topGC != bottomGC)
	XSetClipMask(XtDisplay(mw), bottomGC,
		     None);
}
