private bool RemoveRangeRecursive(GridRange rangeToRemove)
{
rangeToRemove = NormalizeRange(rangeToRemove);
for (int i = 0; i < m_ranges.Count; i++)
{
GridRange range = m_ranges[i];
if (range.IntersectsWith(rangeToRemove) == false)
{
continue;
}
GridRange intersection = range.Intersect(rangeToRemove);
m_ranges.Remove(range);
RangeRegion excludedRanges = range.Exclude(intersection);
InternalAdd(excludedRanges);
return(true);
}
return(false);
}
public override void Draw(RangePaintEventArgs e)
{
RangeRegion region = mSelection.GetSelectionRegion();
if (region.IsEmpty())
{
return;
}
// get visible range for scrollable area
GridRange visibleScrollabeRange = mSelection.Grid.RangeAtAreaExpanded(CellPositionType.Scrollable);
System.Drawing.Brush brush = e.GraphicsCache.BrushsCache.GetBrush(mSelection.BackColor);
CellContext focusContext = new CellContext(e.Grid, mSelection.ActivePosition);
// get focus rectangle
// clipped to visible range
GridRange focusClippedRange = visibleScrollabeRange.Intersect(new GridRange(mSelection.ActivePosition, mSelection.ActivePosition));
System.Drawing.Rectangle focusRect = e.Grid.PositionToRectangle(focusClippedRange.Start);
//Draw each selection range
foreach (GridRange rangeToLoop in region)
{
// intersect given range with visible range
// this way we ensure we don't loop through thousands
// of rows to calculate rectToDraw
GridRange rng = visibleScrollabeRange.Intersect(rangeToLoop);
System.Drawing.Rectangle rectToDraw = e.Grid.RangeToRectangle(rng);
if (rectToDraw == System.Drawing.Rectangle.Empty)
{
continue;
}
System.Drawing.Region regionToDraw = new System.Drawing.Region(rectToDraw);
if (rectToDraw.IntersectsWith(focusRect))
{
regionToDraw.Exclude(focusRect);
}
e.GraphicsCache.Graphics.FillRegion(brush, regionToDraw);
//Draw the border only if there isn't a editing cell
// and is the range that contains the focus or there is a single range
if (rng.Contains(mSelection.ActivePosition) || region.Count == 1)
{
if (focusContext.IsEditing() == false)
{
mSelection.Border.Draw(e.GraphicsCache, rectToDraw);
}
}
}
//Draw Focus
System.Drawing.Brush brushFocus = e.GraphicsCache.BrushsCache.GetBrush(mSelection.FocusBackColor);
e.GraphicsCache.Graphics.FillRectangle(brushFocus, focusRect);
}