/// <summary>
/// 重绘背景
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
protected override void OnPaintBackground(I3PaintColumnHeaderEventArgs e)
{
base.OnPaintBackground(e);
if (e.Column != null && e.Column.IsSelected)
{
SolidBrush brush;
if (this.SelectedColor == Color.Empty)
{
brush = new SolidBrush(Color.Orange);
}
else
{
brush = new SolidBrush(this.SelectedColor);
}
e.Graphics.FillRectangle(brush, this.Bounds);
return;
}
if (e.Column == null)
{
I3ThemeManager.DrawColumnHeader(e.Graphics, e.HeaderRect, I3ColumnHeaderStates.Normal);
}
else
{
I3ThemeManager.DrawColumnHeader(e.Graphics, e.HeaderRect, (I3ColumnHeaderStates)e.Column.ColumnState);
}
}
/// <summary>
/// 重绘列头
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
public virtual void OnPaintColumnHeader(I3PaintColumnHeaderEventArgs e)
{
// paint the Column header's background
this.OnPaintBackground(e);
// paint the Column headers foreground
this.OnPaint(e);
}
/// <summary>
/// Raises the PaintBackground event
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
protected override void OnPaintBackground(I3PaintColumnHeaderEventArgs e)
{
base.OnPaintBackground(e);
Color start = this.StartColor;
Color end = this.EndColor;
if (e.Column != null && e.Column.IsSelected)
{
start = this.SelectedColor;
if (start == Color.Empty)
{
start = Color.Orange;
}
end = ControlPaint.Light(start);
}
if (e.Column == null || e.Column.ColumnState != I3ColumnState.Pressed)
{
using (LinearGradientBrush brush = new LinearGradientBrush(e.HeaderRect, start, end, LinearGradientMode.Vertical))
{
e.Graphics.FillRectangle(brush, e.HeaderRect);
}
using (Pen pen = new Pen(end))
{
e.Graphics.DrawLine(pen, e.HeaderRect.Left, e.HeaderRect.Top, e.HeaderRect.Right - 2, e.HeaderRect.Top);
e.Graphics.DrawLine(pen, e.HeaderRect.Left, e.HeaderRect.Top, e.HeaderRect.Left, e.HeaderRect.Bottom - 1);
}
using (Pen pen = new Pen(start))
{
e.Graphics.DrawLine(pen, e.HeaderRect.Right - 1, e.HeaderRect.Top, e.HeaderRect.Right - 1, e.HeaderRect.Bottom - 1);
e.Graphics.DrawLine(pen, e.HeaderRect.Left + 1, e.HeaderRect.Bottom - 1, e.HeaderRect.Right - 1, e.HeaderRect.Bottom - 1);
}
}
else
{
Color pressed = this.PressedColor;
if (pressed == Color.Empty)
{
pressed = ControlPaint.Light(start);
}
using (SolidBrush brush = new SolidBrush(pressed))
{
e.Graphics.FillRectangle(brush, e.HeaderRect);
}
using (Pen pen = new Pen(start))
{
e.Graphics.DrawRectangle(pen, e.HeaderRect.X, e.HeaderRect.Y, e.HeaderRect.Width - 1, e.HeaderRect.Height - 1);
}
}
}
/// <summary>
/// Raises the PaintBackground event
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
protected override void OnPaintBackground(I3PaintColumnHeaderEventArgs e)
{
base.OnPaintBackground(e);
SolidBrush brush = this.BackBrush;
if (e.Column != null && e.Column.IsSelected)
{
if (this.SelectedColor == Color.Empty)
{
brush = new SolidBrush(Color.Orange);
}
else
{
brush = new SolidBrush(this.SelectedColor);
}
}
e.Graphics.FillRectangle(brush, this.Bounds);
}
/// <summary>
/// Raises the Paint event
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
protected override void OnPaint(I3PaintColumnHeaderEventArgs e)
{
base.OnPaint(e);
if (e.Column == null)
{
return;
}
Rectangle textRect = this.ClientRectangle;
Rectangle imageRect = Rectangle.Empty;
if (e.Column.HeaderImage != null)
{
imageRect = this.CalcImageRect();
textRect.Width -= imageRect.Width;
textRect.X += imageRect.Width;
if (e.Column.HeaderImageOnRight)
{
imageRect.X = this.ClientRectangle.Right - imageRect.Width;
textRect.X = this.ClientRectangle.X;
}
this.DrawColumnHeaderImage(e.Graphics, e.Column.HeaderImage, imageRect, e.Column.Enabled);
}
Rectangle arrowRect = Rectangle.Empty;
if (e.Column.SortOrder != SortOrder.None)
{
arrowRect = this.CalcSortArrowRect();
arrowRect.X = textRect.Right - arrowRect.Width;
textRect.Width -= arrowRect.Width;
this.DrawSortArrow(e.Graphics, arrowRect, e.Column.SortOrder, e.Column.Enabled);
}
StringAlignment old = this.StringFormat.Alignment;
string drawText = e.Column.Caption;
if (e.Column.Caption.Length > 0 && textRect.Width > 0)
{
//计算绘制文本的起始点
switch (e.Column.HeaderAlignment)
{
case I3ColumnAlignment.Center:
this.StringFormat.Alignment = StringAlignment.Center;
break;
case I3ColumnAlignment.Right:
this.StringFormat.Alignment = StringAlignment.Far;
break;
default:
this.StringFormat.Alignment = StringAlignment.Near;
break;
}
//this.StringFormat.Trimming=EllipsisCharacter,指定文本超出范围时的剪切方式为以....替代
drawText = e.Column.Caption;
int columnIndex = e.Table.ColumnModel.Columns.IndexOf(e.Column);
switch (e.Table.ColumnHeaderDisplayMode)
{
case I3ColumnHeaderDisplayMode.Num:
drawText = (columnIndex + 1).ToString();
break;
case I3ColumnHeaderDisplayMode.Reference:
drawText = I3ReferenceUtil.GetColumnName(columnIndex + 1);
break;
default:
break;
}
if (e.Column.Enabled)
{
e.Graphics.DrawString(drawText, this.Font, this.ForeBrush, textRect, this.StringFormat);
}
else
{
using (SolidBrush brush = new SolidBrush(SystemPens.GrayText.Color))
{
e.Graphics.DrawString(drawText, this.Font, brush, textRect, this.StringFormat);
}
}
}
//cal needsize
CalColumnHeaderNeedWidth(e.Graphics, e.Column, drawText, this.Font, this.StringFormat, imageRect.Width + arrowRect.Width);
this.StringFormat.Alignment = old;
}
/// <summary>
/// 重绘
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
protected override void OnPaint(I3PaintColumnHeaderEventArgs e)
{
base.OnPaint(e);
if (e.Column == null)
{
return;
}
Rectangle textRect = this.ClientRectangle;
Rectangle imageRect = Rectangle.Empty;
//绘制image
if (e.Column.HeaderImage != null)
{
//计算图标显示区域
imageRect = this.CalcImageRect();
//重置文本显示区域的值
textRect.Width -= imageRect.Width;
textRect.X += imageRect.Width;
//如果图标显示在右边，重置图标显示区域、文本显示区域的值
if (e.Column.HeaderImageOnRight)
{
imageRect.X = this.ClientRectangle.Right - imageRect.Width;
textRect.X = this.ClientRectangle.X;
}
//VisualStylesEnabled=true且列头按下时，图标显示区域向下、向右各移动1像素
if (!I3ThemeManager.VisualStylesEnabled && e.Column.ColumnState == I3ColumnState.Pressed)
{
imageRect.X += 1;
imageRect.Y += 1;
}
//绘制图像
this.DrawColumnHeaderImage(e.Graphics, e.Column.HeaderImage, imageRect, e.Column.Enabled);
}
//VisualStylesEnabled=true且列头按下时，文本显示区域向下、向右各移动1像素
if (!I3ThemeManager.VisualStylesEnabled && e.Column.ColumnState == I3ColumnState.Pressed)
{
textRect.X += 1;
textRect.Y += 1;
}
//画排序标签
Rectangle arrowRect = Rectangle.Empty;
if (e.Column.SortOrder != SortOrder.None)
{
//计算排序标签显示区域
arrowRect = this.CalcSortArrowRect();
arrowRect.X = textRect.Right - arrowRect.Width;
textRect.Width -= arrowRect.Width;
//绘制排序标签
this.DrawSortArrow(e.Graphics, arrowRect, e.Column.SortOrder, e.Column.Enabled);
}
//绘制文本
StringAlignment old = this.StringFormat.Alignment;
string drawText = e.Column.Caption;
if (e.Column.Caption.Length > 0 && textRect.Width > 0)
{
//计算绘制文本的起始点
switch (e.Column.HeaderAlignment)
{
case I3ColumnAlignment.Center:
this.StringFormat.Alignment = StringAlignment.Center;
break;
case I3ColumnAlignment.Right:
this.StringFormat.Alignment = StringAlignment.Far;
break;
default:
this.StringFormat.Alignment = StringAlignment.Near;
break;
}
//this.StringFormat.Trimming=EllipsisCharacter,指定文本超出范围时的剪切方式为以....替代
int columnIndex = e.Table.ColumnModel.Columns.IndexOf(e.Column);
switch (e.Table.ColumnHeaderDisplayMode)
{
case I3ColumnHeaderDisplayMode.Num:
drawText = (columnIndex + 1).ToString();
break;
case I3ColumnHeaderDisplayMode.Reference:
drawText = I3ReferenceUtil.GetColumnName(columnIndex + 1);
break;
case I3ColumnHeaderDisplayMode.None:
drawText = "";
break;
default:
break;
}
if (e.Column.Enabled)
{
e.Graphics.DrawString(drawText, this.Font, this.ForeBrush, textRect, this.StringFormat);
}
else
{
using (SolidBrush brush = new SolidBrush(SystemPens.GrayText.Color))
{
e.Graphics.DrawString(drawText, this.Font, brush, textRect, this.StringFormat);
}
}
}
//cal needsize
CalColumnHeaderNeedWidth(e.Graphics, e.Column, drawText, this.Font, this.StringFormat, imageRect.Width + arrowRect.Width);
this.StringFormat.Alignment = old;
}
/// <summary>
/// 重绘列头
/// Raises the Paint event
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
protected virtual void OnPaint(I3PaintColumnHeaderEventArgs e)
{
}
/// <summary>
/// 重绘背景，子函数实现
/// Raises the PaintBackground event
/// </summary>
/// <param name="e">A PaintHeaderEventArgs that contains the event data</param>
protected virtual void OnPaintBackground(I3PaintColumnHeaderEventArgs e)
{
}
