protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
VirtualHeight = 0;
VirtualWidth = 0;
Graphics g = e.Graphics;
//绘制边框
if (borderStyle == BorderStyle.FixedSingle)
{
Pen pen = new Pen(Color.FromArgb(100, 100, 100));
Point[] point = new Point[4];
point[0] = new Point(0, 0);
point[1] = new Point(Width - 1, 0);
point[2] = new Point(Width - 1, Height - 1);
point[3] = new Point(0, Height - 1);
g.DrawPolygon(pen, point);//
}
g.TranslateTransform(-listHScroll.Value, 0); //根据滚动条的值设置坐标偏移
g.TranslateTransform(0, -chatVScroll.Value); //根据滚动条的值设置坐标偏移
DrawColumn(g);
g.ResetTransform(); //重置坐标系
chatVScroll.VirtualHeight = VirtualHeight; //绘制完成计算虚拟高度决定是否绘制滚动条
if (chatVScroll.Visible) //是否绘制滚动条
{
chatVScroll.ReDrawScroll(g);
}
listHScroll.VirtualWidth = VirtualWidth;
if (listHScroll.Visible)
{
listHScroll.ReDrawScroll(g);
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
VirtualHeight = 0;
_rows.Clear();
e.Graphics.TranslateTransform(-_hScroll.Value, 0); //根据滚动条的值设置坐标偏移
DrawColumn(e.Graphics);
e.Graphics.TranslateTransform(0, -_vScroll.Value); //根据滚动条的值设置坐标偏移
if (DataSource != null)
{
e.Graphics.TranslateClip(0, ColumnHeight);//平移 绕过 标题
using (SolidBrush solidBrush = new SolidBrush(this.ForeColor))
{
Pen pen = new Pen(BorderColor);
string value = string.Empty;
float y = ColumnHeight;
VirtualHeight = ColumnHeight;
int i = 0;
foreach (var item in DataSource)
{
DrawRow(e.Graphics, solidBrush, pen, y, item);
RectangleF rectangle = new RectangleF(0, y, (this.Width > VirtualWidth) ? VirtualWidth : this.VirtualWidth, RowHeight);
_rows.Add(rectangle);
y += RowHeight;
e.Graphics.DrawLine(pen, 0, y, (this.Width > VirtualWidth) ? VirtualWidth : this.VirtualWidth, y);
VirtualHeight += RowHeight;
if (SelectionIndex == i)
{
solidBrush.Color = SelectionColor;
e.Graphics.FillRectangle(solidBrush, rectangle);
}
else if (m_MouseMoveIndex == i)
{
solidBrush.Color = MouseMoveColor;
e.Graphics.FillRectangle(solidBrush, rectangle);
}
i++;
}
}
e.Graphics.TranslateClip(0, -ColumnHeight);
}
if (m_DragRowOrColumn == 0)
{
if (m_MousePreview != null)
{
e.Graphics.DrawImage(m_MousePreview, m_MouseMovePos.X - m_MouseDownOffset.X, m_MouseMovePos.Y - m_MouseDownOffset.Y);
}
//绘制预插入的位置
if (!m_Prepare.IsEmpty)
{
e.Graphics.DrawRectangle(Pens.Black, m_Prepare.X - 0.5f, m_Prepare.Y, m_Prepare.Width + 0.5f, m_Prepare.Height);
e.Graphics.FillRectangle(Brushes.White, m_Prepare);
}
}
e.Graphics.ResetTransform(); //重置坐标系
_vScroll.VirtualHeight = VirtualHeight; //绘制完成计算虚拟高度决定是否绘制滚动条
if (_MouseVisible && _vScroll.Visible) //是否绘制滚动条
{
_vScroll.ReDrawScroll(e.Graphics);
}
_hScroll.VirtualWidth = VirtualWidth;
if (_MouseVisible && _hScroll.Visible)
{
_hScroll.ReDrawScroll(e.Graphics);
}
if (m_DragRowOrColumn == 1)
{
if (m_MousePreview != null)
{
e.Graphics.DrawImage(m_MousePreview, m_MouseMovePos.X - m_MouseDownOffset.X, m_MouseMovePos.Y - m_MouseDownOffset.Y);
}
//绘制预插入的位置
if (!m_Prepare.IsEmpty)
{
e.Graphics.DrawRectangle(Pens.Black, m_Prepare.X - 0.5f, m_Prepare.Y, m_Prepare.Width + 0.5f, m_Prepare.Height);
e.Graphics.FillRectangle(Brushes.White, m_Prepare);
}
}
}
