/// <summary>
/// Draw the selection using the SelectionColor property over the selected cells. Draw a Border around the selection using Border and BorderMode properties.
/// </summary>
/// <param name="p_Panel"></param>
/// <param name="graphics"></param>
/// <param name="pRangeToRedraw">The range of cells that must be redrawed. Consider that can contains also not selected cells.</param>
public virtual void DrawSelectionMask(GridSubPanel p_Panel, DevAge.Drawing.GraphicsCache graphics, Range pRangeToRedraw)
{
if (IsEmpty())
{
return;
}
Region oldClip = graphics.Graphics.Clip;
SolidBrush brushFillMask = graphics.BrushsCache.GetBrush(BackColor);
try
{
graphics.Graphics.Clip = new Region(graphics.ClipRectangle);
Range rangeFocus = Range.Empty;
Rectangle rectFocus = Rectangle.Empty;
if (m_ActivePosition.IsEmpty() == false && pRangeToRedraw.Contains(m_ActivePosition))
{
rectFocus = p_Panel.RectangleGridToPanel(Grid.PositionToRectangle(m_ActivePosition));
rangeFocus = Grid.PositionToCellRange(m_ActivePosition);
}
Cells.ICellVirtual cellFocus = Grid.GetCell(m_ActivePosition);
//Draw selection mask and border
//Draw each cell separately
if ((m_MaskStyle & SelectionMaskStyle.DrawOnlyInitializedCells) == SelectionMaskStyle.DrawOnlyInitializedCells &&
(MaskStyle & SelectionMaskStyle.DrawSeletionOverCells) == SelectionMaskStyle.DrawSeletionOverCells) //Draw Over cells enabled?
{
PositionCollection selectedCells = GetCellsPositions();
for (int i = 0; i < selectedCells.Count; i++)
{
//if must be redrawed, is is not the cell with the focus and contains a cell
if (pRangeToRedraw.Contains(selectedCells[i]) && rangeFocus.Contains(selectedCells[i]) == false &&
Grid.GetCell(selectedCells[i]) != null)
{
Rectangle rect = p_Panel.RectangleGridToPanel(Grid.PositionToRectangle(selectedCells[i]));
graphics.Graphics.FillRectangle(brushFillMask, rect);
}
}
}
//draw all the selected ranges (Default) //Draw Over cells enabled?
else if ((MaskStyle & SelectionMaskStyle.DrawSeletionOverCells) == SelectionMaskStyle.DrawSeletionOverCells)
{
RangeCollection selectedRanges = GetRanges();
for (int i = 0; i < selectedRanges.Count; i++)
{
Range range = selectedRanges[i];
if (range.IntersectsWith(pRangeToRedraw))
{
Rectangle rect = p_Panel.RectangleGridToPanel(Grid.RangeToRectangle(range));
if (range.Contains(m_ActivePosition))
{
Region region = new Region(rect);
region.Exclude(rectFocus);
graphics.Graphics.FillRegion(brushFillMask, region);
}
else
{
graphics.Graphics.FillRectangle(brushFillMask, rect);
}
}
}
}
//Draw focus mask and focus border (only if there is a fucus cell and is not in editng mode)
CellContext focusCellContext = new CellContext(Grid, m_ActivePosition, cellFocus);
if (cellFocus != null && focusCellContext.IsEditing() == false &&
pRangeToRedraw.Contains(m_ActivePosition))
{
//Draw Over cells enabled?
if ((MaskStyle & SelectionMaskStyle.DrawSeletionOverCells) == SelectionMaskStyle.DrawSeletionOverCells)
{
if (m_FocusBackColor != Color.Transparent)
{
Brush focusBrush = graphics.BrushsCache.GetBrush(m_FocusBackColor);
graphics.Graphics.FillRectangle(focusBrush, rectFocus);
}
}
}
if (focusCellContext.IsEditing() == false)
{
mRangeHighlight.DrawHighlight(p_Panel, graphics, pRangeToRedraw);
}
}
finally
{
graphics.Graphics.Clip = oldClip;
}
}
