protected override void DrawNodeImageCore(CustomDrawNodeImagesEventArgs e, Rectangle bounds, Point location, object imageList, int imageIndex)
{
e.Appearance.FillRectangle(e.Cache, bounds);
MyTreeListNode node = e.Node as MyTreeListNode;
if (node == null)
{
return;
}
Image img = node.AvatarImage;
if (img != null)
{
e.Cache.DrawImage(img, node.AvatarImageBounds);
}
else
{
e.Cache.DrawRectangle(Pens.Gray, node.AvatarImageBounds);
}
string caption = node.AvatarCaption;
if (caption != string.Empty)
{
e.Appearance.TextOptions.VAlignment = DevExpress.Utils.VertAlignment.Top;
e.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center;
e.Appearance.TextOptions.WordWrap = DevExpress.Utils.WordWrap.Wrap;
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.FormatFlags = StringFormatFlags.NoWrap;
e.Cache.DrawString(caption, e.Appearance.GetFont(), e.Appearance.GetForeBrush(e.Cache), node.AvatarCaptionBounds, sf);
}
}
/// <summary>
/// 设置图片节点的背景色
/// 说明：在CustomDrawNodeImages事件中使用
/// </summary>
/// <param name="tree">TreeList</param>
/// <param name="e">CustomDrawNodeImagesEventArgs</param>
/// <param name="builderBackColorHandler">委托</param>
public static void CustomImageNodeBackColor(this TreeList tree, CustomDrawNodeImagesEventArgs e, Func <TreeListNode, Color> builderBackColorHandler)
{
TreeListNode _node = e.Node;
Color _backColor = builderBackColorHandler(_node);
e.Graphics.FillRectangle(new SolidBrush(_backColor), e.Bounds);
}
void OnTreeListCustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e)
{
TreeList tree = (TreeList)sender;
IFileImage _item = (IFileImage)tree.GetRow(e.Node.Id);
if (_item.Image == null)
{
return;
}
e.Cache.DrawImage(_item.Image, e.SelectImageLocation);
e.Handled = true;
}
private void treeList1_CustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e)
{
string name = e.Node[0].ToString();
if (name == "Suyama, Michael")
{
e.SelectImageIndex = 0; // e.SelectImageIndex为图片在ImageList中的index
}
else
{
e.SelectImageIndex = 1;
}
int level = e.Node.Level;
if (level == 0)
{
e.SelectImageIndex = 0;
}
else if (level == 1)
{
e.SelectImageIndex = 1;
}
else if (level == 2)
{
e.SelectImageIndex = 2;
}
else if (level == 3)
{
e.SelectImageIndex = 3;
}
else if (level == 4)
{
e.SelectImageIndex = 4;
}
else if (level == 5)
{
e.SelectImageIndex = 5;
}
else if (level == 6)
{
e.SelectImageIndex = 6;
}
else if (level == 7)
{
e.SelectImageIndex = 7;
}
}
/// <summary>
/// 树形控件添加图标
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void treeList_Station_CustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e)
{
//0 叶子 1 打开文件夹 2 文件夹
if (e.Node.Nodes.Count > 0)
{
if (e.Node.Expanded)
{
e.SelectImageIndex = 1;
return;
}
e.SelectImageIndex = 2;
}
else
{
e.SelectImageIndex = 0;
}
}
private void treeListEmp_CustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e)
{
//if (e.Node.HasChildren)
// if (e.Node.Expanded)
// e.SelectImageIndex = 0;
// else
// e.SelectImageIndex = 1;
if (e.Node.HasChildren)
{
e.Node.SelectImageIndex = 0;
e.Node.ImageIndex = 0;
}
else
{
e.Node.SelectImageIndex = 1;
e.Node.ImageIndex = 1;
}
}
private void treeListTask_CustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e)
{
foreach (TreeListNode treeListNode in e.Node.Nodes)
{
// ImageIndex用来指定树节点在正常状态下显示的图标，
// SelectImageIndex用来指定树节点在选中状态下显示的图标
if (Convert.ToInt32(treeListNode["Status"].ToString()) == 0)
{
treeListNode.ImageIndex = 0;
treeListNode.SelectImageIndex = 0;
}
else
{
treeListNode.ImageIndex = 1;
treeListNode.SelectImageIndex = 2;
}
}
}
private void treeList1_CustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e)
{
//DrawBackGround(e.Node, e);
}