C# GridVirtual类代码示例

		protected virtual void grid_MouseDown(GridVirtual sender, System.Windows.Forms.MouseEventArgs e)
		{
			//verifico che l'eventuale edit sia terminato altrimenti esco
			if (sender.Selection.ActivePosition.IsEmpty() == false)
			{
				CellContext focusCell = new CellContext(sender, sender.Selection.ActivePosition);
				if (focusCell.Cell != null && focusCell.IsEditing())
				{
					if (focusCell.EndEdit(false) == false)
						return;
				}
			}

			//scateno eventi di MouseDown
			Position position = sender.PositionAtPoint( new Point(e.X, e.Y) );
			if (position.IsEmpty() == false)
			{
				Cells.ICellVirtual cellMouseDown = sender.GetCell(position);
				if (cellMouseDown != null)
				{
					sender.ChangeMouseDownCell(position, position);

					//Cell.OnMouseDown
					CellContext cellContext = new CellContext(sender, position, cellMouseDown);
					sender.Controller.OnMouseDown(cellContext, e);
				}
			}
			else
				sender.ChangeMouseDownCell(Position.Empty, Position.Empty);
		}

		protected virtual void grid_MouseDown(GridVirtual sender, MouseEventArgs e)
		{
#warning da fare
            //if (sender.Selection.BorderRange.IsEmpty() == false)
            //{
            //    Position mousePos = sender.PositionAtPoint(new System.Drawing.Point(e.X, e.Y));

            //    if (mousePos.IsEmpty() == false)
            //    {
            //        float distance;
            //        DevAge.Drawing.RectanglePartType partType = sender.Selection.Border.GetPointPartType(sender.Selection.GetDrawingRectangle(), 
            //            new System.Drawing.Point( e.X, e.Y) , out distance);
            //        if ( partType == DevAge.Drawing.RectanglePartType.BottomBorder || 
            //            partType == DevAge.Drawing.RectanglePartType.TopBorder || 
            //            partType == DevAge.Drawing.RectanglePartType.RightBorder || 
            //            partType == DevAge.Drawing.RectanglePartType.LeftBorder)
            //        {
            //            RangeData data = new RangeData();
            //            data.LoadData(sender, sender.Selection.BorderRange, mousePos, mCutMode);
            //            if (mCutMode == CutMode.None)
            //                sender.DoDragDrop(data, DragDropEffects.Copy);
            //            else
            //                sender.DoDragDrop(data, DragDropEffects.Move);
            //        }
            //    }
            //}
		}

		protected override void OnDetach(GridVirtual grid)
		{
			grid.DragEnter -= new GridDragEventHandler(grid_DragEnter);
			grid.DragLeave -= new GridEventHandler(grid_DragLeave);
			grid.DragDrop -= new GridDragEventHandler(grid_DragDrop);
            grid.DragOver -= new GridDragEventHandler(grid_DragOver);
        }

        public override void BindToGrid(GridVirtual p_grid)
        {
            base.BindToGrid(p_grid);

            mDecorator = new Decorators.DecoratorSelection(this);
            Grid.Decorators.Add(mDecorator);
        }

        public virtual void Export(GridVirtual grid, System.Drawing.Graphics graphics, 
                                Range rangeToExport, System.Drawing.Point destinationLocation)
        {
            if (rangeToExport.IsEmpty())
                return;

            System.Drawing.Point cellPoint = destinationLocation;

            System.Drawing.Point deltaPoint = destinationLocation;

            using (DevAge.Drawing.GraphicsCache graphicsCache = new DevAge.Drawing.GraphicsCache(graphics))
            {
                for (int r = rangeToExport.Start.Row; r <= rangeToExport.End.Row; r++)
                {
                    int rowHeight = grid.Rows.GetHeight(r);

                    for (int c = rangeToExport.Start.Column; c <= rangeToExport.End.Column; c++)
                    {
                        Rectangle cellRectangle;
                        Position pos = new Position(r, c);

                        Size cellSize = new Size(grid.Columns.GetWidth(c), rowHeight);

                        Range range = grid.PositionToCellRange(pos);

                        //support for RowSpan or ColSpan
                        //Note: for now I draw only the merged cell at the first position
                        // (this can cause a problem if you export partial range that contains a partial merged cells)
                        if ( range.ColumnsCount > 1 || range.RowsCount > 1)
                        {
                            //Is the first position
                            if (range.Start == pos)
                            {
                                Size rangeSize = grid.RangeToSize(range);

                                cellRectangle = new Rectangle(cellPoint,
                                                              rangeSize);
                            }
                            else
                                cellRectangle = Rectangle.Empty;
                        }
                        else
                        {
                            cellRectangle = new Rectangle(cellPoint, cellSize);
                        }

                        if (cellRectangle.IsEmpty == false)
                        {
                            Cells.ICellVirtual cell = grid.GetCell(pos);
                            CellContext context = new CellContext(grid, pos, cell);
                            ExportCell(context, graphicsCache, cellRectangle);
                        }

                        cellPoint = new Point(cellPoint.X + cellSize.Width, cellPoint.Y);
                    }

                    cellPoint = new Point(destinationLocation.X, cellPoint.Y + rowHeight);
                }
            }
        }

        public virtual System.Drawing.Bitmap Export(GridVirtual grid, Range rangeToExport)
        {
            System.Drawing.Bitmap bitmap = null;

            try
            {
                System.Drawing.Size size = grid.RangeToSize(rangeToExport);

                bitmap = new System.Drawing.Bitmap(size.Width, size.Height);

                using (System.Drawing.Graphics graphic = System.Drawing.Graphics.FromImage(bitmap))
                {
                    Export(grid, graphic, rangeToExport, new System.Drawing.Point(0, 0));
                }
            }
            catch (Exception)
            {
                if (bitmap != null)
                {
                    bitmap.Dispose();
                    bitmap = null;
                }

                throw;
            }

            return bitmap;
        }

		protected override void OnDetach(GridVirtual grid)
		{
			grid.MouseDown -= new GridMouseEventHandler(grid_MouseDown);
			grid.MouseUp -= new GridMouseEventHandler(grid_MouseUp);
			grid.MouseMove -= new GridMouseEventHandler(grid_MouseMove);
			grid.MouseLeave -= new GridEventHandler(grid_MouseLeave);
		}

		protected override void OnDetach(GridVirtual grid)
		{
			grid.MouseMove -= new GridMouseEventHandler(grid_MouseMove);
			grid.MouseLeave -= new GridEventHandler(grid_MouseLeave);
			grid.MouseDown -= new GridMouseEventHandler(grid_MouseDown);
            grid.GiveFeedback -= new GridGiveFeedbackEventHandler(grid_GiveFeedback);
        }

		/// <summary>
		/// Add the Control to the specified grid. Consider that a Control can only be a child of one Container.
		/// </summary>
		private void AttachControl(GridVirtual grid)
		{
			mGrid = grid;
			mLinkedControl = new LinkedControlValue(Control, Position.Empty);
			Control.Hide();
			grid.LinkedControls.Add(mLinkedControl);
			Control.Validated += new EventHandler(InnerControl_Validated);
			Control.KeyPress += new KeyPressEventHandler(InnerControl_KeyPress);
		}

		public GridPrintDocument(GridVirtual grid)
		{
			m_Grid = grid;
			// Default to empty background
			m_CellPrintView.BackColor = Color.Empty;
			m_HeaderCellPrintView.BackColor = Color.Empty;

			m_PageHeaderFont = new Font(grid.Font, FontStyle.Regular);
			m_PageTitleFont = new Font(grid.Font, FontStyle.Bold);
			m_PageFooterFont = new Font(grid.Font, FontStyle.Regular);
		}

		protected virtual void grid_MouseUp(GridVirtual sender, System.Windows.Forms.MouseEventArgs e)
		{
			if (sender.MouseDownPosition.IsEmpty() == false)
			{
				Cells.ICellVirtual l_MouseDownCell = sender.GetCell(sender.MouseDownPosition);
				if (l_MouseDownCell!=null)
					sender.Controller.OnMouseUp(new CellContext(sender, sender.MouseDownPosition, l_MouseDownCell), e );

				sender.ChangeMouseDownCell(Position.Empty, sender.PositionAtPoint(new Point(e.X, e.Y)));
			}
		}

		private void grid_KeyDown(GridVirtual sender, KeyEventArgs e)
		{
			if (e.Handled)
				return;

			if (sender.Selection.IsEmpty())
				return;

			if (e.KeyCode == Keys.Delete)
			{
				sender.ClearValues(sender.Selection.GetSelectionRegion());
				e.Handled = true;
			}
		}

		protected virtual void grid_MouseDown(GridVirtual sender, System.Windows.Forms.MouseEventArgs e)
		{
			//Check if the cell is valid
			if (sender.Selection.ActivePosition.IsEmpty() == false)
			{
				//If the cell is still active exit
				if (sender.MouseDownPosition == sender.Selection.ActivePosition)
					return;

				//If the cell is still in editing then exit and stop the multi selection
				CellContext focusCell = new CellContext(sender, sender.Selection.ActivePosition);
				if (focusCell.Cell != null && focusCell.IsEditing())
					return;
			}

#warning Da fare
            ////Select the cell
            //if (sender.MouseDownPosition.IsEmpty() == false)
            //{
            //    Cells.ICellVirtual cellMouseDown = sender.GetCell(sender.MouseDownPosition);
            //    if (cellMouseDown != null)
            //    {
            //        //Only select the cell if click inside or ourside the selection area (if click inside the border is not considered)
            //        float distance;
            //        DevAge.Drawing.RectanglePartType partType = sender.Selection.Border.GetPointPartType(sender.Selection.GetDrawingRectangle(), 
            //            new System.Drawing.Point( e.X, e.Y) , out distance);
            //        if (partType == DevAge.Drawing.RectanglePartType.ContentArea || 
            //            partType == DevAge.Drawing.RectanglePartType.None)
            //        {
            //            bool l_bShiftPress = ((Control.ModifierKeys & Keys.Shift) == Keys.Shift &&
            //                (sender.SpecialKeys & GridSpecialKeys.Shift) == GridSpecialKeys.Shift);
				
            //            if (l_bShiftPress == false || 
            //                sender.Selection.EnableMultiSelection == false || 
            //                sender.Selection.ActivePosition.IsEmpty() )
            //            {
            //                //Standard focus on the cell on MouseDown
            //                if (sender.Selection.Contains(sender.MouseDownPosition) == false || e.Button == MouseButtons.Left) //solo se non è stata ancora selezionata
            //                    sender.Selection.Focus(sender.MouseDownPosition);
            //            }
            //            else //handle shift key
            //            {
            //                sender.Selection.Clear();
            //                Range rangeToSelect = new Range(sender.Selection.ActivePosition, sender.MouseDownPosition);
            //                sender.Selection.Add(rangeToSelect);
            //            }
            //        }
            //    }
            //}
		}

		private void grid_KeyDown(GridVirtual sender, KeyEventArgs e)
		{
			if (e.Handled)
				return;

#warning da fare

            //Range rng = sender.Selection.BorderRange;
            //if (rng.IsEmpty())
            //    return;

            ////Paste
            //if (e.Control && e.KeyCode == Keys.V && PasteEnabled)
            //{
            //    RangeData rngData = RangeData.ClipboardGetData();
			
            //    if (rngData != null)
            //    {
            //        Range destinationRange = rngData.FindDestinationRange(sender, rng.Start);
            //        if (ExpandSelection == false)
            //            destinationRange = destinationRange.Intersect(rng);

            //        rngData.WriteData(sender, destinationRange);
            //        e.Handled = true;
            //        sender.Selection.Clear();
            //        sender.Selection.Add(destinationRange);
            //    }
            //}
            ////Copy
            //else if (e.Control && e.KeyCode == Keys.C && CopyEnabled)
            //{
            //    RangeData data = new RangeData();
            //    data.LoadData(sender, rng, rng.Start, CutMode.None);
            //    RangeData.ClipboardSetData(data);

            //    e.Handled = true;
            //}
            ////Cut
            //else if (e.Control && e.KeyCode == Keys.X && CutEnabled)
            //{
            //    RangeData data = new RangeData();
            //    data.LoadData(sender, rng, rng.Start, CutMode.CutImmediately);
            //    RangeData.ClipboardSetData(data);
				
            //    e.Handled = true;
            //}
		}

		protected virtual void grid_MouseMove(GridVirtual sender, MouseEventArgs e)
		{
#warning da fare
            //if (sender.Selection.BorderRange.IsEmpty() == false)
            //{
            //    float distance;
            //    DevAge.Drawing.RectanglePartType partType = sender.Selection.Border.GetPointPartType(sender.Selection.GetDrawingRectangle(), 
            //                                                                new System.Drawing.Point( e.X, e.Y) , out distance);
            //    if ( partType == DevAge.Drawing.RectanglePartType.BottomBorder || 
            //        partType == DevAge.Drawing.RectanglePartType.TopBorder || 
            //        partType == DevAge.Drawing.RectanglePartType.RightBorder || 
            //        partType == DevAge.Drawing.RectanglePartType.LeftBorder)
            //        mDragCursor.ApplyCursor(sender);
            //    else
            //        mDragCursor.ResetCursor();
            //}
		}