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Fix assert with setting current cell in wxGrid::Redimension()

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Avoid calling wxGrid::SetCurrentCell(0, 0) when the grid has no columns
or rows, as it doesn't have any cells then and doing this logically
fails the precondition assert in GetColPos().

Also refactor all 6 different snippets calling SetCurrentCell() in
Redimension() into a single function to simplify the code and make it
more maintainable.

Add a unit test verifying that this works as intended.

Closes https://github.com/wxWidgets/wxWidgets/pull/1546
This commit is contained in:
Ilya Sinitsyn
2019-09-13 00:06:37 +07:00
committed by Vadim Zeitlin
parent 41b444e011
commit dda6aa6bdc
3 changed files with 78 additions and 46 deletions
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88
src/generic/grid.cpp
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@@ -2915,13 +2915,7 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
}
}
if ( m_currentCellCoords == wxGridNoCellCoords )
{
// if we have just inserted cols into an empty grid the current
// cell will be undefined...
//
SetCurrentCell( 0, 0 );
}
UpdateCurrentCellOnRedim();
if ( m_selection )
m_selection->UpdateRows( pos, numRows );
@@ -2960,13 +2954,7 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
}
}
if ( m_currentCellCoords == wxGridNoCellCoords )
{
// if we have just inserted cols into an empty grid the current
// cell will be undefined...
//
SetCurrentCell( 0, 0 );
}
UpdateCurrentCellOnRedim();
if ( !GetBatchCount() )
{
@@ -2996,15 +2984,7 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
}
}
if ( !m_numRows )
{
m_currentCellCoords = wxGridNoCellCoords;
}
else
{
if ( m_currentCellCoords.GetRow() >= m_numRows )
m_currentCellCoords.Set( 0, 0 );
}
UpdateCurrentCellOnRedim();
if ( m_selection )
m_selection->UpdateRows( pos, -((int)numRows) );
@@ -3080,13 +3060,7 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
}
}
if ( m_currentCellCoords == wxGridNoCellCoords )
{
// if we have just inserted cols into an empty grid the current
// cell will be undefined...
//
SetCurrentCell( 0, 0 );
}
UpdateCurrentCellOnRedim();
if ( m_selection )
m_selection->UpdateCols( pos, numCols );
@@ -3144,13 +3118,8 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
if ( m_useNativeHeader )
GetGridColHeader()->SetColumnCount(m_numCols);
if ( m_currentCellCoords == wxGridNoCellCoords )
{
// if we have just inserted cols into an empty grid the current
// cell will be undefined...
//
SetCurrentCell( 0, 0 );
}
UpdateCurrentCellOnRedim();
if ( !GetBatchCount() )
{
CalcDimensions();
@@ -3199,15 +3168,7 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
}
}
if ( !m_numCols )
{
m_currentCellCoords = wxGridNoCellCoords;
}
else
{
if ( m_currentCellCoords.GetCol() >= m_numCols )
m_currentCellCoords.Set( 0, 0 );
}
UpdateCurrentCellOnRedim();
if ( m_selection )
m_selection->UpdateCols( pos, -((int)numCols) );
@@ -3622,6 +3583,41 @@ void wxGrid::ProcessRowLabelMouseEvent( wxMouseEvent& event, wxGridRowLabelWindo
}
}
void wxGrid::UpdateCurrentCellOnRedim()
{
if (m_currentCellCoords == wxGridNoCellCoords)
{
// We didn't have any valid selection before, which can only happen
// if the grid was empty.
// Check if this is still the case and ensure we do have valid
// selection if the grid is not empty any more.
if (m_numCols > 0 && m_numRows > 0)
{
SetCurrentCell(0, 0);
}
}
else
{
if (m_numCols == 0 || m_numRows == 0)
{
// We have to reset the selection, as it must either use validate
// coordinates otherwise, but there are no valid coordinates for
// the grid cells any more now that it is empty.
m_currentCellCoords = wxGridNoCellCoords;
}
else
{
int col = m_currentCellCoords.GetCol();
int row = m_currentCellCoords.GetRow();
if (col >= m_numCols)
col = m_numCols - 1;
if (row >= m_numRows)
row = m_numRows - 1;
SetCurrentCell(col, row);
}
}
}
void wxGrid::UpdateColumnSortingIndicator(int col)
{
wxCHECK_RET( col != wxNOT_FOUND, "invalid column index" );