private void UpdateRowCaches(int rowIndex, ref DataGridViewRow dataGridViewRow, bool adding)
{
if (((this.rowCountsVisible != -1) || (this.rowCountsVisibleFrozen != -1)) || (((this.rowCountsVisibleSelected != -1) || (this.rowsHeightVisible != -1)) || (this.rowsHeightVisibleFrozen != -1)))
{
DataGridViewElementStates rowState = this.GetRowState(rowIndex);
if ((rowState & DataGridViewElementStates.Visible) != DataGridViewElementStates.None)
{
int num = adding ? 1 : -1;
int num2 = 0;
if ((this.rowsHeightVisible != -1) || ((this.rowsHeightVisibleFrozen != -1) && ((rowState & (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen)) == (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen))))
{
num2 = adding ? dataGridViewRow.GetHeight(rowIndex) : -dataGridViewRow.GetHeight(rowIndex);
dataGridViewRow = this.SharedRow(rowIndex);
}
if (this.rowCountsVisible != -1)
{
this.rowCountsVisible += num;
}
if (this.rowsHeightVisible != -1)
{
this.rowsHeightVisible += num2;
}
if ((rowState & (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen)) == (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen))
{
if (this.rowCountsVisibleFrozen != -1)
{
this.rowCountsVisibleFrozen += num;
}
if (this.rowsHeightVisibleFrozen != -1)
{
this.rowsHeightVisibleFrozen += num2;
}
}
if (((rowState & (DataGridViewElementStates.Visible | DataGridViewElementStates.Selected)) == (DataGridViewElementStates.Visible | DataGridViewElementStates.Selected)) && (this.rowCountsVisibleSelected != -1))
{
this.rowCountsVisibleSelected += num;
}
}
}
}
private void UpdateRowCaches(int rowIndex, ref DataGridViewRow dataGridViewRow, bool adding)
{
if (this.rowCountsVisible != -1 || this.rowCountsVisibleFrozen != -1 || this.rowCountsVisibleSelected != -1 ||
this.rowsHeightVisible != -1 || this.rowsHeightVisibleFrozen != -1)
{
DataGridViewElementStates rowStates = GetRowState(rowIndex);
if ((rowStates & DataGridViewElementStates.Visible) != 0)
{
int rowCountIncrement = adding ? 1 : -1;
int rowHeightIncrement = 0;
if (this.rowsHeightVisible != -1 ||
(this.rowsHeightVisibleFrozen != -1 &&
((rowStates & (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen)) == (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen))))
{
// dataGridViewRow may become unshared in GetHeight call
rowHeightIncrement = adding ? dataGridViewRow.GetHeight(rowIndex) : -dataGridViewRow.GetHeight(rowIndex);
dataGridViewRow = SharedRow(rowIndex);
}
if (this.rowCountsVisible != -1)
{
this.rowCountsVisible += rowCountIncrement;
}
if (this.rowsHeightVisible != -1)
{
Debug.Assert(rowHeightIncrement != 0);
this.rowsHeightVisible += rowHeightIncrement;
}
if ((rowStates & (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen)) == (DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen))
{
if (this.rowCountsVisibleFrozen != -1)
{
this.rowCountsVisibleFrozen += rowCountIncrement;
}
if (this.rowsHeightVisibleFrozen != -1)
{
Debug.Assert(rowHeightIncrement != 0);
this.rowsHeightVisibleFrozen += rowHeightIncrement;
}
}
if ((rowStates & (DataGridViewElementStates.Visible | DataGridViewElementStates.Selected)) == (DataGridViewElementStates.Visible | DataGridViewElementStates.Selected))
{
if (this.rowCountsVisibleSelected != -1)
{
this.rowCountsVisibleSelected += rowCountIncrement;
}
}
}
}
#if DEBUG
this.cachedRowCountsAccessAllowed = true;
this.cachedRowHeightsAccessAllowed = true;
#endif
}
private void OnCollectionChanged_PreNotification(CollectionChangeAction cca, int rowIndex, int rowCount, ref DataGridViewRow dataGridViewRow, bool changeIsInsertion)
{
int height;
bool useRowShortcut = false;
bool computeVisibleRows = false;
switch (cca)
{
case CollectionChangeAction.Add:
height = 0;
this.UpdateRowCaches(rowIndex, ref dataGridViewRow, true);
if ((this.GetRowState(rowIndex) & DataGridViewElementStates.Visible) != DataGridViewElementStates.None)
{
int firstDisplayedRowIndex = this.DataGridView.FirstDisplayedRowIndex;
if (firstDisplayedRowIndex != -1)
{
height = this.SharedRow(firstDisplayedRowIndex).GetHeight(firstDisplayedRowIndex);
}
break;
}
useRowShortcut = true;
computeVisibleRows = changeIsInsertion;
break;
case CollectionChangeAction.Remove:
{
DataGridViewElementStates rowState = this.GetRowState(rowIndex);
bool flag3 = (rowState & DataGridViewElementStates.Visible) != DataGridViewElementStates.None;
bool flag4 = (rowState & DataGridViewElementStates.Frozen) != DataGridViewElementStates.None;
this.rowStates.RemoveAt(rowIndex);
this.SharedList.RemoveAt(rowIndex);
this.DataGridView.OnRemovedRow_PreNotification(rowIndex);
if (!flag3)
{
useRowShortcut = true;
}
else if (!flag4)
{
if ((this.DataGridView.FirstDisplayedScrollingRowIndex != -1) && (rowIndex > this.DataGridView.FirstDisplayedScrollingRowIndex))
{
int num4 = 0;
int num5 = this.DataGridView.FirstDisplayedRowIndex;
if (num5 != -1)
{
num4 = this.SharedRow(num5).GetHeight(num5);
}
useRowShortcut = this.GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, (this.DataGridView.LayoutInfo.Data.Height + this.DataGridView.VerticalScrollingOffset) + SystemInformation.HorizontalScrollBarHeight) && (num4 <= this.DataGridView.LayoutInfo.Data.Height);
}
}
else
{
useRowShortcut = (this.DataGridView.FirstDisplayedScrollingRowIndex == -1) && this.GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, this.DataGridView.LayoutInfo.Data.Height + SystemInformation.HorizontalScrollBarHeight);
}
goto Label_02DF;
}
case CollectionChangeAction.Refresh:
this.InvalidateCachedRowCounts();
this.InvalidateCachedRowsHeights();
goto Label_02DF;
default:
goto Label_02DF;
}
if (changeIsInsertion)
{
this.DataGridView.OnInsertedRow_PreNotification(rowIndex, 1);
if (!useRowShortcut)
{
if ((this.GetRowState(rowIndex) & DataGridViewElementStates.Frozen) != DataGridViewElementStates.None)
{
useRowShortcut = (this.DataGridView.FirstDisplayedScrollingRowIndex == -1) && this.GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, this.DataGridView.LayoutInfo.Data.Height);
}
else if ((this.DataGridView.FirstDisplayedScrollingRowIndex != -1) && (rowIndex > this.DataGridView.FirstDisplayedScrollingRowIndex))
{
useRowShortcut = this.GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, this.DataGridView.LayoutInfo.Data.Height + this.DataGridView.VerticalScrollingOffset) && (height <= this.DataGridView.LayoutInfo.Data.Height);
}
}
}
else
{
this.DataGridView.OnAddedRow_PreNotification(rowIndex);
if (!useRowShortcut)
{
int num3 = (this.GetRowsHeight(DataGridViewElementStates.Visible) - this.DataGridView.VerticalScrollingOffset) - dataGridViewRow.GetHeight(rowIndex);
dataGridViewRow = this.SharedRow(rowIndex);
useRowShortcut = (this.DataGridView.LayoutInfo.Data.Height < num3) && (height <= this.DataGridView.LayoutInfo.Data.Height);
}
}
Label_02DF:
this.DataGridView.ResetUIState(useRowShortcut, computeVisibleRows);
}
private void OnCollectionChanged_PreNotification(CollectionChangeAction cca,
int rowIndex,
int rowCount,
ref DataGridViewRow dataGridViewRow,
bool changeIsInsertion)
{
Debug.Assert(this.DataGridView != null);
bool useRowShortcut = false;
bool computeVisibleRows = false;
switch (cca)
{
case CollectionChangeAction.Add:
{
int firstDisplayedRowHeight = 0;
UpdateRowCaches(rowIndex, ref dataGridViewRow, true);
if ((GetRowState(rowIndex) & DataGridViewElementStates.Visible) == 0)
{
// Adding an invisible row - no need for repaint
useRowShortcut = true;
computeVisibleRows = changeIsInsertion;
}
else
{
int firstDisplayedRowIndex = this.DataGridView.FirstDisplayedRowIndex;
if (firstDisplayedRowIndex != -1)
{
firstDisplayedRowHeight = SharedRow(firstDisplayedRowIndex).GetHeight(firstDisplayedRowIndex);
}
}
if (changeIsInsertion)
{
this.DataGridView.OnInsertedRow_PreNotification(rowIndex, 1);
if (!useRowShortcut)
{
if ((GetRowState(rowIndex) & DataGridViewElementStates.Frozen) != 0)
{
// Inserted row is frozen
useRowShortcut = this.DataGridView.FirstDisplayedScrollingRowIndex == -1 &&
GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, this.DataGridView.LayoutInfo.Data.Height);
}
else if (this.DataGridView.FirstDisplayedScrollingRowIndex != -1 &&
rowIndex > this.DataGridView.FirstDisplayedScrollingRowIndex)
{
useRowShortcut = GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, this.DataGridView.LayoutInfo.Data.Height + this.DataGridView.VerticalScrollingOffset) &&
firstDisplayedRowHeight <= this.DataGridView.LayoutInfo.Data.Height;
}
}
}
else
{
this.DataGridView.OnAddedRow_PreNotification(rowIndex);
if (!useRowShortcut)
{
int displayedRowsHeightBeforeAddition = GetRowsHeight(DataGridViewElementStates.Visible) - this.DataGridView.VerticalScrollingOffset - dataGridViewRow.GetHeight(rowIndex);
dataGridViewRow = SharedRow(rowIndex);
useRowShortcut = this.DataGridView.LayoutInfo.Data.Height < displayedRowsHeightBeforeAddition &&
firstDisplayedRowHeight <= this.DataGridView.LayoutInfo.Data.Height;
}
}
break;
}
case CollectionChangeAction.Remove:
{
Debug.Assert(rowCount == 1);
DataGridViewElementStates rowStates = GetRowState(rowIndex);
bool deletedRowVisible = (rowStates & DataGridViewElementStates.Visible) != 0;
bool deletedRowFrozen = (rowStates & DataGridViewElementStates.Frozen) != 0;
// Can't do this earlier since it would break UpdateRowCaches
this.rowStates.RemoveAt(rowIndex);
this.SharedList.RemoveAt(rowIndex);
#if DEBUG
this.DataGridView.dataStoreAccessAllowed = false;
#endif
this.DataGridView.OnRemovedRow_PreNotification(rowIndex);
if (deletedRowVisible)
{
if (deletedRowFrozen)
{
// Delete row is frozen
useRowShortcut = this.DataGridView.FirstDisplayedScrollingRowIndex == -1 &&
GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, this.DataGridView.LayoutInfo.Data.Height + SystemInformation.HorizontalScrollBarHeight);
}
else if (this.DataGridView.FirstDisplayedScrollingRowIndex != -1 &&
rowIndex > this.DataGridView.FirstDisplayedScrollingRowIndex)
{
int firstDisplayedRowHeight = 0;
int firstDisplayedRowIndex = this.DataGridView.FirstDisplayedRowIndex;
if (firstDisplayedRowIndex != -1)
{
firstDisplayedRowHeight = SharedRow(firstDisplayedRowIndex).GetHeight(firstDisplayedRowIndex);
}
useRowShortcut = GetRowsHeightExceedLimit(DataGridViewElementStates.Visible, 0, rowIndex, this.DataGridView.LayoutInfo.Data.Height + this.DataGridView.VerticalScrollingOffset + SystemInformation.HorizontalScrollBarHeight) &&
firstDisplayedRowHeight <= this.DataGridView.LayoutInfo.Data.Height;
}
}
else
{
// Deleting an invisible row - no need for repaint
useRowShortcut = true;
}
break;
}
case CollectionChangeAction.Refresh:
{
InvalidateCachedRowCounts();
InvalidateCachedRowsHeights();
break;
}
default:
{
Debug.Fail("Unexpected cca value in DataGridViewRowCollecttion.OnCollectionChanged");
break;
}
}
this.DataGridView.ResetUIState(useRowShortcut, computeVisibleRows);
}
