/// <summary>
/// 绘制列头的文本。
/// </summary>
/// <param name="graphics"></param>
/// <param name="column"></param>
/// <param name="rect"></param>
protected virtual void DrawColumnHeaderText(Graphics graphics, TreeListColumn column, Rectangle rect)
{
var foreColor = column.ForeColor.IsEmpty ? column.TreeList.ForeColor : column.ForeColor;
var font = column.Font ?? column.TreeList.Font;
var flags = TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter;
if (column.TreeList.ColumnHorizontalCenter || column.TextAlign == HorizontalAlignment.Center)
{
flags |= TextFormatFlags.HorizontalCenter;
}
else if (column.TextAlign == HorizontalAlignment.Right)
{
flags |= TextFormatFlags.Right;
}
TextRenderer.DrawText(graphics, column.Text, font, rect, foreColor, flags);
}
private void ProcessSpringColumnWidth()
{
var width = 0;
TreeListColumn springColumn = null;
var assert = new AssertFlag();
foreach (var column in Columns)
{
if (!column.Spring || !assert.AssertTrue())
{
width += column.Width;
}
else
{
springColumn = column;
}
}
if (springColumn != null)
{
springColumn.Width = Math.Max(0, Width - width - _bound.WorkBound.X * 2 - (ShowVerScrollBar ? _vbar.Width : 0));
}
}
/// <summary>
/// 对集合进行排序。
/// </summary>
/// <param name="sortVersion"></param>
/// <param name="column"></param>
/// <param name="order"></param>
internal void Sort(int sortVersion, TreeListColumn column, SortOrder order)
{
if (_sortVersion == sortVersion)
{
return;
}
_sortVersion = sortVersion;
((List <TreeListItem>)Items).Sort(new TreeListItemComparer(column, order));
//子节点排序，重新编排索引值
var index = 0;
foreach (var item in Items)
{
if (item.Expended)
{
item.Items.Sort(sortVersion, column, order);
}
item.Index = index++;
}
}
/// <summary>
/// 对集合进行排序。
/// </summary>
/// <param name="column"></param>
/// <param name="order"></param>
public void Sort(TreeListColumn column, SortOrder order)
{
Sort(_sortVersion, column, order);
}
internal TreeListColumnRenderEventArgs(TreeListColumn column, Graphics graphics, Rectangle rect)
: base(graphics, rect)
{
Column = column;
}
/// <summary>
/// 初始化 <see cref="TreeListItemComparer"/> 类的新实例。
/// </summary>
/// <param name="column">当前排序的列。</param>
/// <param name="order">排序方式。</param>
public TreeListItemComparer(TreeListColumn column, SortOrder order)
{
_column = column;
_order = order;
}
/// <summary>
/// 初始化 <see cref="TreeListItemComparer"/> 类的新实例。
/// </summary>
/// <param name="column">当前排序的列。</param>
/// <param name="order">排序方式。</param>
public TreeListItemComparer(TreeListColumn column, SortOrder order)
{
this.column = column;
this.order = order;
}