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Fix wxGrid::PosToLinePos() in presence of hidden rows or columns.

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The optimization of the binary search inside this function failed if any
rows/columns were hidden and so were of zero size.

See #14133.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72490 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2012-09-15 23:17:57 +00:00
parent bc7d2e9dd4
commit 5bce3d5701
1 changed files with 7 additions and 22 deletions
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29
src/generic/grid.cpp
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@ -6502,8 +6502,8 @@ wxGridCellCoords wxGrid::XYToCell(int x, int y) const
// compute row or column from some (unscrolled) coordinate value, using either // compute row or column from some (unscrolled) coordinate value, using either
// m_defaultRowHeight/m_defaultColWidth or binary search on array of // m_defaultRowHeight/m_defaultColWidth or binary search on array of
// m_rowBottoms/m_colRights to do it quickly (linear search shouldn't be used // m_rowBottoms/m_colRights to do it quickly in O(log n) time.
// for large grids) // NOTE: This may not work correctly for reordered columns.
int wxGrid::PosToLinePos(int coord, int wxGrid::PosToLinePos(int coord,
bool clipToMinMax, bool clipToMinMax,
const wxGridOperations& oper) const const wxGridOperations& oper) const
@ -6531,26 +6531,11 @@ int wxGrid::PosToLinePos(int coord,
} }
// adjust maxPos before starting the binary search // binary search is quite efficient and we can't really make any assumptions
if ( maxPos >= numLines ) // on where to start here since row and columns could be of size 0 if they are
{ // hidden. While this could be made more efficient, some profiling will be
maxPos = numLines - 1; // necessary to determine if it really is a performance bottleneck
} maxPos = numLines - 1;
else
{
if ( coord >= lineEnds[oper.GetLineAt(this, maxPos)])
{
minPos = maxPos;
const int minDist = oper.GetMinimalAcceptableLineSize(this);
if ( minDist )
maxPos = coord / minDist;
else
maxPos = numLines - 1;
}
if ( maxPos >= numLines )
maxPos = numLines - 1;
}
// check if the position is beyond the last column // check if the position is beyond the last column
const int lineAtMaxPos = oper.GetLineAt(this, maxPos); const int lineAtMaxPos = oper.GetLineAt(this, maxPos);