個人認為 winform 的 combobox 不是那么的好用，所以自己擴展了一下。
重新定義 Items 屬性，并且支持樹結構。
為每項加入了 CheckBox 狀態。
豐富的列表項類 ListItem。
效果如圖：
代碼清單：
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing.Design;
using System.Drawing.Drawing2D;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.Design;
namespace FaibClass.Windows.Forms
{
[Designer(typeof(ControlDesigner))]
public class ComboBox : System.Windows.Forms.ComboBox
{
// Fields
private bool blnIsChange = false;
private int m_ImageIndex = -1;
private ImageList m_ImageList;
private ListItemCollection m_items;
private object objSource;
private Color m_ItemHoverBackColor;
private Color m_ItemHoverGradientBackColor = Color.Empty;
private Color m_ItemHoverColor;
private int m_Indent = 16;
private bool m_CheckBoxes = false;
private bool isUpdate = false;
private ComboBoxWindow wnd = null;
internal static int nextId = 0;
Methods#region Methods
public ComboBox()
{
m_ItemHoverBackColor = SystemColors.Highlight;
m_ItemHoverColor = SystemColors.HighlightText;
base.Sorted = false;
}
/**//// <summary>
/// 綁定數據。
/// </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;
}
}
}
}
//鎖定更新
public new void BeginUpdate()
{
base.BeginUpdate();
isUpdate = true;
}
//解除更新
public new void EndUpdate()
{
InsertItem(m_items);
base.EndUpdate();
isUpdate = false;
}
//繪制項
protected override void OnDrawItem(DrawItemEventArgs e)
{
if(e.Index == -1)return;
Rectangle trect = new Rectangle(0, 0, 0, 0), crect = new Rectangle(0, 0, 0, 0);
ListItem item = getItem(e.Index);
if(item == null)return;
bool isEdit = (e.State & DrawItemState.ComboBoxEdit) == DrawItemState.ComboBoxEdit;
if(m_CheckBoxes) //復選框的區域
{
crect = new Rectangle(m_Indent * item.level, e.Bounds.Top + ((e.Bounds.Height - 16) / 2), 16, 16);
if(isEdit)
crect.Offset(2, 0);
}
else
{
crect.X = m_Indent * item.level + 2;
}
//if(isEdit)
DrawBackground(e, e.Bounds, item);
//else
// DrawBackground(e, new Rectangle(crect.Left - 1, e.Bounds.Top, e.Bounds.Width - crect.Left + 1, e.Bounds.Height), item);
Rectangle irect = new Rectangle(crect.Right, 0, 0, 0);
if(ImageList != null && item.ImageIndex != -1)//畫圖象
{
Image sIcon = ImageList.Images[item.ImageIndex];
irect = new Rectangle(crect.Right, e.Bounds.Top + ((e.Bounds.Height - sIcon.Height) / 2), sIcon.Width, sIcon.Height);
//圖象太大
if(irect.Height > e.Bounds.Height)
{
irect = new Rectangle(crect.Right, e.Bounds.Top, e.Bounds.Height, e.Bounds.Height);
}
e.Graphics.DrawImage(sIcon, irect);
}
trect = new Rectangle(irect.Right, e.Bounds.Top, e.Bounds.Width - irect.Width, e.Bounds.Height);
if(m_CheckBoxes) //畫復選框
{
if(item.checkboxLeft == -1)
item.checkboxLeft= crect.Left;
ControlPaint.DrawCheckBox(e.Graphics, crect , item.Checked ? ButtonState.Checked | ButtonState.Flat : ButtonState.Flat);
}
DrawString(e, item, trect); //輸出文本
e.Graphics.Dispose();
}
//重設項大小
protected override void OnMeasureItem(MeasureItemEventArgs e)
{
base.OnMeasureItem(e);
if (this.ImageList != null)
{
e.ItemHeight = this.ImageList.ImageSize.Height;
}
}
protected override void WndProc(ref Message m)
{
if(m.Msg == 0x134)//WM_CTLCOLORLISTBOX
{
if(m_CheckBoxes && wnd == null)
{
wnd = new ComboBoxWindow(base.Items, Handle); //鉤子
wnd.AssignHandle(m.LParam);
}
}
else if(wnd != null && m.Msg == 0x2)//WM_DESTROY
{
wnd.ReleaseHandle();
}
else if(m.Msg == 0x400 + 0x105) //自定消息 設置checked
{
int index = m.WParam.ToInt32();
ListItem item = FindRealListItem(getItem(index));
if(item != null)
{
item.Checked = !item.Checked;
}
}
base.WndProc (ref m);
}
//畫背景
private void DrawBackground(DrawItemEventArgs e, Rectangle rect, ListItem item)
{
if((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
if(m_ItemHoverGradientBackColor != Color.Empty)
{
//漸變
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);
}
}
//畫文本
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();
}
//插入整個根集合
private void InsertItem(ListItemCollection items)
{
foreach(ListItem item in items)
{
ListItem lit = item.CloneData();
lit.Items = null;
lit.level = item.level;
if(item.Parent.GetType() == typeof(ListItem))
{
ListItem parent = (ListItem)item.Parent;
lit.Parent = parent;
}
base.Items.Add(lit);
InsertItem(item.Items);
}
}
//插入新項
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 ((ComboBox)item.Parent).Items)
{
GetItemLocation(lt1.Items, lit, ref count);
}
base.Items.Insert(index + count, lit);
}
return base.Items.Count - 1;
}
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 bool CheckIsInItems(int id)
{
foreach(object o in base.Items)
{
if(((ListItem)o).id == id)
{
return true;
}
}
return false;
}
internal void RemoveItem(ListItem item)
{
if(isUpdate)return;
int index = FindItem(item.id);
if(index != -1)
base.Items.RemoveAt(index);
}
internal void ClearItem()
{
base.Items.Clear();
}
private int FindItem(int id)
{
if(this.DesignMode)return -1;
for(int i = 0; i < base.Items.Count; i++)
{
if(getItem(i).id == id)
return i;
}
return -1;
}
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);
}
}
private void FindCheckedItem(ListItemCollection items, ref CheckedListItemCollection checkeditems)
{
foreach(object lt in items)
{
ListItem lt1 = (ListItem)lt;
if(lt1.Checked)checkeditems.Add(lt1);
FindCheckedItem(lt1.Items, ref checkeditems);
}
}
private ListItem FindRealListItem(ListItem item)
{
if(item.Parent == null) //為根節點
{
foreach(ListItem lt in this.m_items)
{
if(lt.id == item.id)
return lt;
}
return null;
}
else
{
ListItem temp = item;
while(true) // 找到根級
{
if(temp.Parent == null)break;
if(temp.Parent.GetType() == typeof(ComboBox))break;
temp = (temp.Parent as ListItem);
}
ListItem find = null;
//找子項里
FindItem(item.id, temp, ref find);
return find;
}
}
internal void setText(int id, string text)
{
int index = FindItem(id);
if(index != -1)
{
getItem(index).Text = text;
}
}
internal void setImageIndex(int id, int imageIndex)
{
int index = FindItem(id);
if(index != -1)
getItem(index).ImageIndex = imageIndex;
}
internal void setForeColor(int id, Color foreColor)
{
int index = FindItem(id);
if(index != -1)
getItem(index).ForeColor = foreColor;
}
internal void setBackColor(int id, Color backColor)
{
int index = FindItem(id);
if(index != -1)
getItem(index).BackColor = backColor;
}
internal void setFont(int id, Font font)
{
int index = FindItem(id);
if(index != -1)
getItem(index).Font = font;
}
internal void setChecked(int id, bool check)
{
int index = FindItem(id);
if(index != -1)
getItem(index).Checked = check;
}
internal void setItem(int id, ListItem item)
{
int index = FindItem(id);
if(index != -1)
base.Items[index] = item.CloneData();
}
private ListItem getItem(int index)
{
if(index < 0 || index > base.Items.Count - 1)
throw new ArgumentNullException("索引值超出集合的范圍");
return (ListItem)base.Items[index];
}
#endregion
Properties#region Properties
[Category("Data"), Description("用于綁定的數據源。")]
public new object DataSource
{
get
{
return this.objSource;
}
set
{
this.objSource = value;
base.DataSource = null;
}
}
[Category("Appearance"),
Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design", typeof(UITypeEditor)),
TypeConverter(typeof(ImageIndexConverter)),
DefaultValue(-1)]
public int ImageIndex
{
get
{
return this.m_ImageIndex;
}
set
{
this.m_ImageIndex = value;
}
}
[Description("組合框中的項的圖象所使用的ImageList控件。"),
Browsable(true),
DefaultValue((string)null)]
public ImageList ImageList
{
get
{
return this.m_ImageList;
}
set
{
this.m_ImageList = value;
}
}
[Category("Behavior"),
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
Editor(typeof(CollectionEditor), typeof(UITypeEditor)),
MergableProperty(false),
Description("組合框中的項。"),
DefaultValue((string)null),
Localizable(true)]
public new ListItemCollection Items
{
get
{
if(m_items == null)
m_items = new ListItemCollection(this, this);
return this.m_items;
}
}
[Browsable(false)]
public new ListItem SelectedItem
{
get
{
if (this.SelectedIndex == -1)
{
return null;
}
return FindRealListItem(getItem(this.SelectedIndex));
}
}
[Browsable(false)]
public new string SelectedText
{
get
{
if (this.SelectedIndex == -1)
{
return null;
}
return SelectedItem.Text;
}
set
{
if ((this.SelectedIndex != -1) && !this.blnIsChange)
{
SelectedItem.Text = value;
}
}
}
[Browsable(false)]
public new object SelectedValue
{
get
{
if (this.SelectedIndex == -1)
{
return null;
}
return SelectedItem.Value;
}
set
{
if (this.SelectedIndex != -1)
{
SelectedItem.Value = value;
}
}
}
[Browsable(false)]
public CheckedListItemCollection CheckedItems
{
get{
CheckedListItemCollection checkitems = new CheckedListItemCollection();
if(m_CheckBoxes)
FindCheckedItem(this.m_items, ref checkitems);
return checkitems;
}
}
[Category("Appearance"),
Description("獲取或設置鼠標移上列表項時的前景景顏色。")]
public Color ItemHoverColor
{
get{return m_ItemHoverColor;}
set{m_ItemHoverColor = value;}
}
[Category("Appearance"),
Description("獲取或設置鼠標移上列表項時的背景顏色。")]
public Color ItemHoverBackColor
{
get{return m_ItemHoverBackColor;}
set{m_ItemHoverBackColor = value;}
}
[Category("Appearance"),
DefaultValue((string)null),
Description("獲取或設置鼠標移上列表項時的背景顏色。")]
public Color ItemHoverGradientBackColor
{
get{return m_ItemHoverGradientBackColor;}
set{m_ItemHoverGradientBackColor = value;}
}
[DefaultValue(16),
Description("子節點的縮進寬度。")]
public int Indent
{
get{return m_Indent;}
set{m_Indent = value;}
}
[DefaultValue(false),
Description("是否顯示復選框。")]
public bool CheckBoxes
{
get{return m_CheckBoxes;}
set{m_CheckBoxes = value;}
}
#endregion
ListItemCollection#region ListItemCollection
public class ListItemCollection : IList, ICollection, IEnumerable
{
private ComboBox owner;
private object parent;
private ArrayList items;
private bool inserted = true;
internal byte level = 0;
// Methods
internal ListItemCollection(ComboBox comboBox, object parent)
{
items = new ArrayList();
this.owner = comboBox;
this.parent = parent;
}
public ListItemCollection()
{
items = new ArrayList();
}
internal ListItemCollection(bool inserted)
{
items = new ArrayList();
this.inserted = inserted;
}
public ListItem this[int index]
{
get{
if(index < 0 || index > items.Count - 1)
throw new ArgumentNullException("索引值超出集合的范圍");
return items[index] as ListItem;
}
set
{
if(index < 0 || index > items.Count - 1)
throw new ArgumentNullException("索引值超出集合的范圍");
ListItem item = (ListItem)items[index];
value.id = item.id;
value.level = item.level;
items[index] = value;
if(owner != null)owner.setItem(value.id, value);
}
}
public int Count
{
get{return items.Count;}
}
public int Add(string Text)
{
return Insert(-1, new ListItem(Text));
}
public int Add(string Text, object Value)
{
return Insert(-1, new ListItem(Text, Value));
}
public int Add(string Text, int ImageIndex)
{
return Insert(-1, new ListItem(Text, ImageIndex));
}
public int Add(string Text, object Value, int ImageIndex)
{
return Insert(-1, new ListItem(Text, Value, ImageIndex));
}
public int Add(ListItem item)
{
return Insert(-1, item);
}
public void AddRange(ListItem[] items)
{
for(IEnumerator e = items.GetEnumerator(); e.MoveNext();)
Insert(-1, (ListItem)e.Current);
}
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; //為添加
}
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 = ComboBox.nextId ++;
if(owner != null)
{
ret = item.Index = owner.InsertItem(index, item, m);
AddItem(item, item.Items);
}
}
return ret;
}
internal void Host(ComboBox comboBox, object parent)
{
this.owner = comboBox;
this.parent = parent;
}
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++;
}
}
public void Remove(ListItem item)
{
if(owner != null)owner.RemoveItem(item);
items.Remove(item);
}
public void RemoveAt(int index)
{
if(owner != null)owner.RemoveItem(this[index]);
items.RemoveAt(index);
}
public int IndexOf(ListItem item)
{
return items.IndexOf(item);
}
public bool Contains(ListItem item)
{
return items.Contains(item);
}
public void Clear()
{
items.Clear();
owner.ClearItem();
}
public IEnumerator GetEnumerator()
{
return items.GetEnumerator();
}
ICollection Members#region ICollection Members
void ICollection.CopyTo(Array array, int index)
{
for (IEnumerator e = this.GetEnumerator(); e.MoveNext();)
array.SetValue(e.Current, index++);
}
bool ICollection.IsSynchronized
{
get { return false; }
}
object ICollection.SyncRoot
{
get { return this; }
}
#endregion
IList Members#region IList Members
object IList.this[int index]
{
get { return this[index]; }
set { this[index] = (ListItem)value; }
}
bool IList.Contains(object item)
{
return Contains((ListItem)item);
}
int IList.Add(object item)
{
return Add((ListItem)item);
}
bool IList.IsFixedSize
{
get {return false;}
}
int IList.IndexOf(object item)
{
return IndexOf((ListItem)item);
}
void IList.Insert(int index, object item)
{
Insert(index, (ListItem)item);
}
void IList.Remove(object item)
{
Remove((ListItem)item);
}
void IList.RemoveAt(int index)
{
RemoveAt(index);
}
void IList.Clear()
{
Clear();
}
bool IList.IsReadOnly
{
get{return false;}
}
#endregion
}
#endregion
CheckedListItemCollection#region CheckedListItemCollection
public class CheckedListItemCollection : CollectionBase
{
public void Add(ListItem item)
{
List.Add(item);
}
public void Remove(ListItem item)
{
List.Remove(item);
}
public ListItem this[int index]
{
get{
if(index < 0 || index > List.Count - 1)
throw new ArgumentNullException("索引值超出集合的范圍");
return List[index] as ListItem;
}
}
}
#endregion
ComboBoxWindow#region ComboBoxWindow
internal class ComboBoxWindow : NativeWindow
{
private System.Windows.Forms.ComboBox.ObjectCollection items;
private IntPtr handle = IntPtr.Zero;
internal ComboBoxWindow(System.Windows.Forms.ComboBox.ObjectCollection items, IntPtr handle)
{
this.items = items;
this.handle = handle;
}
protected override void WndProc(ref Message m)
{
if(m.Msg == 0x201)//WM_LBUTTONDOWN
{
Win32.RECT rect = new Win32.RECT();
Win32.GetClientRect(m.HWnd, ref rect);
Win32.POINTAPI pt = new Win32.POINTAPI();
pt.x = Win32.LOWORD(m.LParam.ToInt32());
pt.y = Win32.HIWORD(m.LParam.ToInt32());
//如果在區域內
if(new Rectangle(rect.Left, rect.Top,rect.Left + rect.Right, rect.Top + rect.Bottom).Contains(new Point(pt.x, pt.y)))
{
int nItemHeight = Win32.SendMessage(m.HWnd, 0x1A1, 0, 0);//LB_GETITEMHEIGHT
//獲得頂部項的索引
int nTopIndex = Win32.SendMessage(m.HWnd, 0x18E, 0, 0); //LB_GETTOPINDEX
int nIndex = nTopIndex + pt.y / nItemHeight;
if (items.Count == 0)
{
base.WndProc (ref m);
return;
}
//判斷是否在復選框處
if(pt.x > ((ListItem)items[nIndex]).checkboxLeft && pt.x < ((ListItem)items[nIndex]).checkboxLeft + 16)
{
Win32.RECT re = new Win32.RECT();
//取位置
Win32.SendMessage(m.HWnd, 0x198, nIndex, ref re); //LB_GETITEMRECT
//重畫
Win32.InvalidateRect(m.HWnd, re, 0);
//發送自定消息勾選復選框
Win32.SendMessage(handle, 0x400 + 0x105, nIndex, 0);
return;
}
}
}
base.WndProc (ref m);
}
}
#endregion
}
}
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Drawing;
namespace FaibClass.Windows.Forms
{
[Serializable,
DesignTimeVisible(false),
DefaultProperty("Text"),
TypeConverter(typeof(ListItemConverter))]
public class ListItem : Component
{
// Fields
private int m_ImageIndex = -1;
private int m_Index;
private object m_Tag;
private string m_Text = string.Empty;
private object m_Value;
private bool m_Checked = false;
private Font m_Font;
private ComboBox comboBox;
private ComboBox.ListItemCollection m_items = new ComboBox.ListItemCollection();
private Color m_ForeColor, m_BackColor;
private object parent;
internal int id = -1;
internal int checkboxLeft = -1;
internal byte level = 0;
// Methods
public ListItem()
{
this.m_ImageIndex = -1;
}
public ListItem(string Text) : this (Text, Text, -1)
{
}
public ListItem(string Text, int ImageIndex) : this (Text, Text, ImageIndex)
{
}
public ListItem(string Text, object Value) : this (Text, Value, -1)
{
}
public ListItem(string Text, object Value, int ImageIndex)
{
this.m_Text = Text;
this.m_Value = Value;
this.m_ImageIndex = ImageIndex;
}
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;
}
public override string ToString()
{
return this.Text;
}
internal void Host(ComboBox comboBox)
{
this.comboBox = comboBox;
m_items.Host(comboBox, this);
m_items.level = (byte)(level + 1);
}
Properties#region Properties
[Category("Appearance"),
Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design", typeof(UITypeEditor)),
TypeConverter(typeof(ImageIndexConverter)),
DefaultValue(-1)]
public int ImageIndex
{
get
{
return this.m_ImageIndex;
}
set
{
this.m_ImageIndex = value;
if(comboBox != null && id != -1)
comboBox.setImageIndex(id, value);
}
}
[Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public int Index
{
get
{
return this.m_Index;
}
set
{
this.m_Index = value;
}
}
[Browsable(true),
TypeConverter(typeof(StringConverter)),
DefaultValue((string)null),
Description("獲取或設置包含數據的對象以與該項關聯。")]
public object Tag
{
get
{
return this.m_Tag;
}
set
{
this.m_Tag = value;
}
}
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible),
Localizable(true),
Description("獲取或設置該項顯示的文本。")]
public string Text
{
get
{
return this.m_Text;
}
set
{
this.m_Text = value;
if(comboBox != null && id != -1)
comboBox.setText(id, value);
}
}
[Description("獲取或設置該項顯示的值。"),
TypeConverter(typeof(StringConverter)),
DefaultValue((string)null),
Browsable(true)]
public object Value
{
get
{
return this.m_Value;
}
set
{
this.m_Value = value;
}
}
[Browsable(false)]
public ImageList ImageList
{
get
{
if(this.comboBox != null)
{
return this.comboBox.ImageList;
}
return null;
}
}
[Category("Appearance")]
public Font Font
{
get{
if(m_Font == null)
{
if(comboBox != null)
{
return comboBox.Font;
}
return Control.DefaultFont;
}
return m_Font;
}
set{m_Font = value;}
}
[Category("Appearance")]
public Color ForeColor
{
get
{
if(m_ForeColor == Color.Empty)
{
if(comboBox != null)
{
return comboBox.ForeColor;
}
return Control.DefaultForeColor;
}
return m_ForeColor;
}
set{
m_ForeColor = value;
if(comboBox != null && id != -1)
comboBox.setForeColor(id, value);
}
}
[Category("Appearance")]
public Color BackColor
{
get
{
if(m_BackColor == Color.Empty)
{
if(comboBox != null)
{
return comboBox.BackColor;
}
return Control.DefaultBackColor;
}
return m_BackColor;
}
set{
m_BackColor = value;
if(comboBox != null && id != -1)
comboBox.setBackColor(id, value);
}
}
[Category("Behavior"),
DefaultValue(false)]
public bool Checked
{
get{return m_Checked;}
set{
m_Checked = value;
if(comboBox != null && id != -1)
comboBox.setChecked(id, value);
}
}
[Category("Behavior"),
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
Editor(typeof(CollectionEditor), typeof(UITypeEditor)),
MergableProperty(false),
Description("組合框中的項。"),
DefaultValue((string)null),
Browsable(false),
Localizable(true)]
public ComboBox.ListItemCollection Items
{
get
{
return this.m_items;
}
set
{
m_items = value;
}
}
internal object Parent
{
get{return parent;}
set{parent = value;}
}
#endregion
}
}
using System;
using System.Drawing.Design;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;
namespace FaibClass.Windows.Forms
{
internal sealed class ListItemConverter: ExpandableObjectConverter
{
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
if(destinationType == typeof(System.ComponentModel.Design.Serialization .InstanceDescriptor))
return true;
else
return base.CanConvertTo (context, destinationType);
}
public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
{
if(destinationType == typeof(System.ComponentModel.Design.Serialization.InstanceDescriptor))
{
Type valueType = value.GetType();
ConstructorInfo ci = valueType.GetConstructor(System.Type.EmptyTypes);
ListItem item = (ListItem)value;
return new InstanceDescriptor(ci,null,false);
}
else
return base.ConvertTo (context, culture, value, destinationType);
}
}
}
using System;
using System.Runtime.InteropServices;
namespace FaibClass.Windows.Forms
{
internal class Win32
{
[DllImport("user32", EntryPoint="GetClientRect")]
public static extern int GetClientRect (
IntPtr hwnd,
ref RECT lpRect
);
[DllImport("user32", EntryPoint="GetWindowRect")]
public static extern int GetWindowRect (
IntPtr hwnd,
ref RECT lpRect
);
[DllImport("user32", EntryPoint="PtInRect")]
public static extern int PtInRect (
ref RECT lpRect,
ref POINTAPI pt
);
[DllImport("user32", EntryPoint="SendMessage")]
public static extern int SendMessage (
IntPtr hwnd,
int wMsg,
int wParam,
int lParam
);
[DllImport("user32", EntryPoint="SendMessage")]
public static extern int SendMessage (
IntPtr hwnd,
int wMsg,
int wParam,
ref RECT rect
);
[DllImport("user32", EntryPoint="InvalidateRect")]
public static extern int InvalidateRect (
IntPtr hwnd,
RECT lpRect,
int bErase
);
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}
[StructLayout(LayoutKind.Sequential)]
public struct POINTAPI
{
public int x;
public int y;
}
public static int HIWORD(int lparam)
{
return ((lparam >> 16) & 0xffff);
}
public static int LOWORD(int lparam)
{
return (lparam & 0xffff);
}
public static int MakeLParam(int LoWord, int HiWord)
{
return (HiWord << 16) | (LoWord & 0xffff);
}
}
}
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