public override void OnDraw(Graphics g)
{
bool bInDesign = false;
if (this.Page != null)
{
bInDesign = this.Page.InDesignMode;
}
if (bInDesign)
{
base.OnDraw(g);
int nRows = this.Rows;
int nCol = this.Columns;
int nWidth = this.Width;
int nHeight = this.Height;
if (nRows <= 0)
{
nRows = 1;
}
if (nCol <= 0)
{
nCol = 1;
}
if (nRows == 1 && nCol == 1)
{
return;
}
int nGapX = this.GapX;
int nGapY = this.GapY;
if (nGapX < 0)
{
nGapX = 0;
}
if (nGapY < 0)
{
nGapY = 0;
}
bool bGetBmp = (_bmp == null);
if (!bGetBmp)
{
if (this.Page != null && !this.Page.ShowingTextInput)
{
if (this.Page.Left >= 0 && this.Page.Top >= 0)
{
if (this.Page.AutoScrollPosition.X == 0 && this.Page.AutoScrollPosition.Y == 0)
{
bGetBmp = true;
}
}
}
}
if (bGetBmp)
{
_bmp = WinUtil.CaptureScreenImage(Page.Handle, this.Left, this.Top, this.Width, this.Height, Page.FormBorderStyle != FormBorderStyle.None);
}
ImageAttributes ia = null;
if (_linePen == null)
{
_linePen = new Pen(new SolidBrush(Color.LightGray));
}
ColorMatrix cm = new ColorMatrix();
ia = new ImageAttributes();
cm.Matrix33 = 0.5f;
ia.SetColorMatrix(cm);
int w = this.Width * nCol;
int h = this.Height * nRows;
for (int r = 0, dh = this.Top; r <= nRows; r++, dh += this.Height)
{
g.DrawLine(_linePen, this.Left, dh, this.Left + w, dh);
}
for (int c = 0, dw = this.Left; c <= nCol; c++, dw += this.Width)
{
g.DrawLine(_linePen, dw, this.Top, dw, this.Top + h);
}
if (_bmp != null)
{
int incH = this.Height + nGapY;
int incW = this.Width + nGapX;
for (int r = 0, dh = this.Top; r < nRows; r++, dh += incH)
{
for (int c = 0, dw = this.Left; c < nCol; c++, dw += incW)
{
if (r != 0 || c != 0)
{
Rectangle rc = new Rectangle(dw, dh, _bmp.Width, _bmp.Height);
if (bInDesign)
{
g.DrawImage(_bmp, rc, 0, 0, _bmp.Width, _bmp.Height, GraphicsUnit.Pixel, ia);
}
else
{
g.DrawImage(_bmp, rc, 0, 0, _bmp.Width, _bmp.Height, GraphicsUnit.Pixel);
}
}
}
}
}
}
else
{
if (_drawItems != null)
{
for (int r = 0; r < _drawItems.Length; r++)
{
for (int c = 0; c < _drawItems[r].Length; c++)
{
_drawItems[r][c].OnDraw(g);
}
}
}
}
}
