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framework for smarter inval of hint rect during drag

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This commit is contained in:
ehouse 2004-06-25 06:56:58 +00:00
parent b637c2c6e6
commit 6a05866e80
1 changed files with 33 additions and 5 deletions
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38
common/board.c
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@ -1865,9 +1865,11 @@ figureHintAtts( BoardCtxt* board, XP_U16 col, XP_U16 row )
if ( row == limits.bottom ) {
result |= isFlipped? HINT_BORDER_RIGHT:HINT_BORDER_BOTTOM;
}
#ifndef XWFEATURE_SEARCHLIMIT_DOCENTERS
if ( result == HINT_BORDER_NONE ) {
result = HINT_BORDER_CENTER;
}
#endif
break;
}
}
@ -1966,6 +1968,30 @@ setHintRect( BoardCtxt* board )
board->hasHintRect[board->selPlayer] = XP_TRUE;
} /* setHintRect */
static void
invalHintRectDiffs( BoardCtxt* board, HintLimits* newLim,
HintLimits* oldLim )
{
/* These two regions will generally have close to 50% of their borders in
common. Try not to inval what needn't be inval'd. But at the moment
performance seems good enough without adding the complexity and new
bugs... */
invalCellRegion( board, newLim->left, newLim->top,
newLim->right, newLim->bottom, XP_FALSE );
invalCellRegion( board, oldLim->left, oldLim->top,
oldLim->right, oldLim->bottom, XP_FALSE );
/* The challenge in doing a smarter diff is that some squares need to be
invalidated even if they're part of the borders of both limits rects,
in particular if one is a corner of one and just a side of another.
One simple but expensive way of accounting for this would be to call
figureHintAtts() on each square in the borders of both rects and
invalidate when the hintAttributes aren't the same for both. That
misses an opportunity to avoid doing any calculations on those border
squares that clearly haven't changed at all.
*/
} /* invalHintRectDiffs */
static XP_Bool
continueHintRegionDrag( BoardCtxt* board, XP_U16 x, XP_U16 y )
{
@ -1973,17 +1999,17 @@ continueHintRegionDrag( BoardCtxt* board, XP_U16 x, XP_U16 y )
XP_U16 col, row;
if ( coordToCell( board, x, y, &col, &row ) ) {
XP_U16 selPlayer = board->selPlayer;
checkScrollCell( board, board->selPlayer, col, row );
checkScrollCell( board, selPlayer, col, row );
if ( col != board->hintDragCurCol || row != board->hintDragCurRow ) {
HintLimits oldHL;
needsRedraw = XP_TRUE;
board->hintDragInProgress = XP_TRUE;
if ( board->hasHintRect[board->selPlayer] ) {
clearCurHintRect( board );
}
/* Now that we've moved, this isn't a timer thing. Clean up any
artifacts. */
board->penTimerFired = XP_FALSE;
@ -1993,8 +2019,10 @@ continueHintRegionDrag( BoardCtxt* board, XP_U16 x, XP_U16 y )
board->hintDragCurCol = col;
board->hintDragCurRow = row;
oldHL = board->limits[selPlayer];
setHintRect( board );
invalCurHintRect( board, board->selPlayer, XP_FALSE );
invalHintRectDiffs( board, &board->limits[selPlayer], &oldHL );
XP_LOGF( "now includes with %d,%d", col, row );
}
}