public void AddRange(ListItem[] items)
{
for (IEnumerator e = items.GetEnumerator(); e.MoveNext(); )
Insert(-1, (ListItem)e.Current);
}
public bool Contains(ListItem item)
{
return items.Contains(item);
}
public void Remove(ListItem item)
{
List.Remove(item);
}
public int Add(ListItem item)
{
return Insert(-1, item);
}
/**/
/// <summary>
/// 绑定数据。
/// </summary>
public void DataBind()
{
if ((this.DataSource != null) && (base.DisplayMember != null))
{
switch (this.DataSource.GetType().Name)
{
case "DataTable":
{
DataTable dtblTmp = (DataTable)this.DataSource;
foreach (DataRow drowTmp in dtblTmp.Rows)
{
string strText = drowTmp[base.DisplayMember].ToString();
string strValue = (base.ValueMember == null) ? null : drowTmp[base.ValueMember].ToString();
ListItem item = new ListItem(strText, strValue, this.ImageIndex);
this.m_items.Add(item);
}
break;
}
}
}
}
public void Add(ListItem item)
{
List.Add(item);
}
private void FindItem(int id, ListItem item, ref ListItem find)
{
foreach (object lt in item.Items)
{
ListItem lt1 = (ListItem)lt;
if (lt1.id == id)
{
find = lt1;
break;
}
FindItem(id, lt1, ref find);
}
}
public void Remove(ListItem item)
{
if (owner != null) owner.RemoveItem(item);
items.Remove(item);
}
//画背景
private void DrawBackground(DrawItemEventArgs e, Rectangle rect, ListItem item)
{
if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
if (m_ItemHoverGradientBackColor != Color.Empty)
{
//渐变
Rectangle r = new Rectangle(rect.Left, rect.Top, rect.Width, rect.Height / 2);
e.Graphics.FillRectangle(new LinearGradientBrush(r, m_ItemHoverBackColor, m_ItemHoverGradientBackColor, 90f), r);
r = new Rectangle(rect.Left, rect.Top + rect.Height / 2, rect.Width, rect.Height / 2);
if (r.Height % 2 == 0) { r.Y -= 2; r.Height += 2; }
e.Graphics.FillRectangle(new LinearGradientBrush(r, m_ItemHoverBackColor, m_ItemHoverGradientBackColor, 270f), r);
ControlPaint.DrawBorder(e.Graphics, rect, m_ItemHoverGradientBackColor, ButtonBorderStyle.Solid);
}
else
e.Graphics.FillRectangle(new SolidBrush(m_ItemHoverBackColor), rect);
}
else
{
e.Graphics.FillRectangle(new SolidBrush(item.BackColor), rect);
}
}
//画文本
private void DrawString(DrawItemEventArgs e, ListItem item, Rectangle rect)
{
StringFormat sf = new StringFormat();
sf.LineAlignment = StringAlignment.Center;
rect.Offset(0, 1);
SolidBrush sb = null;
if (!item.ForeColor.Equals(SystemColors.WindowText) || m_ItemHoverGradientBackColor != Color.Empty)
{
sb = new SolidBrush(item.ForeColor);
}
else if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
sb = new SolidBrush(m_ItemHoverColor);
}
else
{
sb = new SolidBrush(SystemColors.WindowText);
}
e.Graphics.DrawString(item.Text, item.Font, sb, rect, sf);
sb.Dispose();
}
internal void SetItem(int id, ListItem item)
{
int index = FindItem(id);
if (index != -1)
base.Items[index] = item.CloneData();
}
internal void RemoveItem(ListItem item)
{
if (isUpdate) return;
int index = FindItem(item.id);
if (index != -1)
base.Items.RemoveAt(index);
}
//插入新项
internal int InsertItem(int index, ListItem item, int method)
{
if (isUpdate) return 0;
ListItem lit = item.CloneData();
lit.Items = null;
lit.level = item.level;
int count = 0;
if (item.Parent.GetType() == typeof(ListItem))
{
ListItem parent = (ListItem)item.Parent;
foreach (ListItem lt1 in parent.Items)
{
GetItemLocation(lt1.Items, lit, ref count);
}
lit.Parent = parent;
int i = 0;
for (; i < base.Items.Count; i++)
{
if (GetItem(i).id == parent.id)
{
break;
}
}
base.Items.Insert(i + 1 + index + count, lit);
}
else
{
foreach (ListItem lt1 in ((EnforceLawComboBox)item.Parent).Items)
{
GetItemLocation(lt1.Items, lit, ref count);
}
base.Items.Insert(index + count, lit);
}
return base.Items.Count - 1;
}
public int IndexOf(ListItem item)
{
return items.IndexOf(item);
}
private ListItem FindRealListItem(ListItem item)
{
if (item.Parent == null) //为根节点
{
foreach (ListItem lt in this.m_items)
{
if (lt.id == item.id)
return lt;
}
return null;
}
else
{
ListItem temp = item;
while (true) // 找到根级
{
if (temp.Parent == null) break;
if (temp.Parent.GetType() == typeof(EnforceLawComboBox)) break;
temp = (temp.Parent as ListItem);
}
ListItem find = null;
//找子项里
FindItem(item.id, temp, ref find);
return find;
}
}
public int Insert(int index, ListItem item)
{
int ret = 0;
if (inserted)
item.level = level;
int m = 1;
if (index == -1)
{
index = this.Count;
m = 0; //为添加
}
item.Host(owner);
item.Parent = parent;
item.Text = (item.Text.Length == 0) ? item.GetType().Name : item.Text;
items.Insert(index, item);
if (inserted)
{
item.id = EnforceLawComboBox.nextId++;
if (owner != null)
{
ret = item.Index = owner.InsertItem(index, item, m);
AddItem(item, item.Items);
}
}
return ret;
}
private void GetItemLocation(ListItemCollection items, ListItem owner, ref int count)
{
foreach (ListItem lt in items)
{
if (owner.id != lt.id && CheckIsInItems(lt.id))
{
count++;
GetItemLocation(lt.Items, owner, ref count);
}
}
}
private void AddItem(ListItem parent, ListItemCollection items)
{
int i = 0;
foreach (ListItem item in items)
{
item.Host(owner);
item.Parent = parent;
item.level = items.level;
item.Index = owner.InsertItem(i, item, 0);
i++;
}
}
internal ListItem CloneData()
{
ListItem lt = new ListItem();
lt.Text = this.Text;
lt.ImageIndex = this.ImageIndex;
lt.Font = this.Font;
lt.ForeColor = this.ForeColor;
lt.BackColor = this.BackColor;
lt.Checked = this.Checked;
lt.id = id;
return lt;
}
