中财网重生黑道双强宠文:VB打造超酷个性化菜单
来源：百度文库 编辑：中财网 时间：2024/04/29 15:58:26
现在，我想有必要说一说我们现在要做的事情。事实上，我们只要做一个菜单类就行了。但谁都会明白，只做一个菜单类是不够的，我们需要一个程序，或者更详细的说，是一个窗体，来测试我们的菜单类。在我个人的开发过程中，我是先写的菜单类，后写的测试窗体，但为了让大家先领略一下写好的菜单类在应用时是多么的方便，所以让我们先来看看测试窗体：
（1）打开VB，新建“标准EXE”工程。
（2）下面是窗体的控件：
组件名称
属性
值
Form
Name
Caption
frmMain
菜单例子
Frame
Name
Caption
fraStyle
菜单风格
Label
Name
Caption
lblHelp
在窗体空白处单击鼠标右键
OptionButton
Name
Caption
Index
opnStyle
Window 标准
0
OptionButton
Name
Caption
Index
opnStyle
XP 风格
1
OptionButton
Name
Caption
Index
opnStyle
3D 立体风格
2
OptionButton
Name
Caption
Index
opnStyle
渐变风格
3
OptionButton
Name
Caption
Index
opnStyle
多彩风格
4
其实就是在窗体上添加了一个Frame，然后在Frame里添加OptionButton控件数组，用来设置菜单风格，还有一个Label，上面只显示一行提示文字，非常简单。（3）窗体代码：
Option Explicit
Private Declare Function GetCursorPos Lib "user32.dll" (lpPoint As POINTAPI) As Long
Private Type POINTAPI
X As Long
Y As Long
End Type
Dim menu As cMenu
Private Sub Form_Load()
' 初始化菜单并添加菜单项
Set menu = New cMenu
menu.CreateMenu
menu.AddItem "open", LoadPicture("images\open.ico"), "打开", MIT_STRING
menu.AddItem "save", LoadPicture("images\save.ico"), "保存", MIT_STRING
menu.AddItem "print", LoadPicture("images\print.ico"), "打印", MIT_STRING
menu.AddItem "find", LoadPicture("images\find.ico"), "查找", MIT_STRING
menu.AddItem "sep1", LoadPicture(), "", MIT_SEPARATOR
menu.AddItem "undo", LoadPicture("images\undo.ico"), "撤消", MIT_STRING
menu.AddItem "redo", LoadPicture("images\redo.ico"), "重复", MIT_STRING
menu.AddItem "sep2", LoadPicture(), "", MIT_SEPARATOR
menu.AddItem "cut", LoadPicture("images\cut.ico"), "剪切", MIT_STRING
menu.AddItem "copy", LoadPicture("images\copy.ico"), "复制", MIT_STRING
menu.AddItem "paste", LoadPicture("images\paste.ico"), "粘贴", MIT_STRING
menu.AddItem "sep3", LoadPicture(), "", MIT_SEPARATOR
menu.AddItem "check", LoadPicture("images\check.ico"), "一个 CheckBox", MIT_CHECKBOX
menu.AddItem "exit", LoadPicture("images\exit.ico"), "退出", MIT_STRING
End Sub
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
' 单击鼠标右建弹出菜单
If Button = vbRightButton Then
Dim pos As POINTAPI
GetCursorPos pos
menu.PopupMenu pos.X, pos.Y, POPUP_LEFTALIGN Or POPUP_TOPALIGN
End If
End Sub
Private Sub Form_Unload(Cancel As Integer)
' 释放资源, 卸载窗体
Set menu = Nothing
Dim frm As Form
For Each frm In Forms
Unload frm
Next
End Sub
Private Sub opnStyle_Click(Index As Integer)
' 设置菜单风格
Select Case Index
Case 0 ' Windows 标准
menu.Style = STYLE_WINDOWS
Case 1 ' XP 风格
menu.Style = STYLE_XP
Case 2 ' 3D 立体风格
menu.Style = STYLE_3D
Case 3 ' 渐变风格
menu.Style = STYLE_SHADE
Case 4 ' 多彩风格
menu.Style = STYLE_COLORFUL
End Select
End Sub
图1
图2
图3
图4
图5
这篇文章只是抛砖引玉，让大家先睹为快，提前体验一下这个菜单类的魅力。在下一篇中，我们将继续讨论个性化菜单的制作，不一样的是，我们的重点将是那个cMenu类。 :)
未完待续… 其实，漂亮的界面都是“画”出来的，菜单当然也不例外。既然是“画”出来的，就需要有窗体来接收“画”菜单这个消息，后面我们会看到，实际上不仅仅是“画”这个消息，一切关于这个菜单的消息都要有一个窗体来接收。如果你对消息不太了解，可以看看网上其它一些关于Windows消息机制的文章。不了解也没有关系，只要会使用就可以了，后面的文章给出了完整的源代码，而且文章的最后还给出了源代码的下载地址。下面我们来创建接收消息的窗体：打开上次建好的工程，添加一个窗体，并将其名称设置为frmMenu（注意：这一步是必须的）。还记得上篇文章的最后一幅图吗？菜单左边那个黑底色的附加条，为了方便，将frmMenu的Picture属性设置成那幅图。到此，这个窗体就算OK了！对了，就这样，因为这个窗体仅仅是为了处理消息和存储那个黑底色的风格条，我们将会对它进行子类处理，处理消息的代码全部都放在了将在下一篇中详细介绍的标准模块中。
接下来添加一个类模块，并将其名称设置为cMenu，代码如下：
'*************************************************************'* 本类模块是一个菜单类, 提供了各种样式的菜单的制作方案
'*
'* 版权: LPP软件工作室
'* 作者: 卢培培(goodname008)
'* (******* 复制请保留以上信息 *******)
'*************************************************************
Option Explicit
Private Declare Function TrackPopupMenu Lib "user32" (ByVal hMenu As Long,
ByVal wFlags As Long, ByVal x As Long, ByVal y As Long, ByVal nReserved As Long,
ByVal hwnd As Long, lprc As Any) As Long
Public Enum MenuUserStyle ' 菜单总体风格
STYLE_WINDOWS
STYLE_XP
STYLE_SHADE
STYLE_3D
STYLE_COLORFUL
End Enum
Public Enum MenuSeparatorStyle ' 菜单分隔条风格
MSS_SOLID
MSS_DASH
MSS_DOT
MSS_DASDOT
MSS_DASHDOTDOT
MSS_NONE
MSS_DEFAULT
End Enum
Public Enum MenuItemSelectFillStyle ' 菜单项背景填充风格
ISFS_NONE
ISFS_SOLIDCOLOR
ISFS_HORIZONTALCOLOR
ISFS_VERTICALCOLOR
End Enum
Public Enum MenuItemSelectEdgeStyle ' 菜单项边框风格
ISES_SOLID
ISES_DASH
ISES_DOT
ISES_DASDOT
ISES_DASHDOTDOT
ISES_NONE
ISES_SUNKEN
ISES_RAISED
End Enum
Public Enum MenuItemIconStyle ' 菜单项图标风格
IIS_NONE
IIS_SUNKEN
IIS_RAISED
IIS_SHADOW
End Enum
Public Enum MenuItemSelectScope ' 菜单项高亮条的范围
ISS_TEXT = &H1
ISS_ICON_TEXT = &H2
ISS_LEFTBAR_ICON_TEXT = &H4
End Enum
Public Enum MenuLeftBarStyle ' 菜单附加条风格
LBS_NONE
LBS_SOLIDCOLOR
LBS_HORIZONTALCOLOR
LBS_VERTICALCOLOR
LBS_IMAGE
End Enum
Public Enum MenuItemType ' 菜单项类型
MIT_STRING = &H0
MIT_CHECKBOX = &H200
MIT_SEPARATOR = &H800
End Enum
Public Enum MenuItemState ' 菜单项状态
MIS_ENABLED = &H0
MIS_DISABLED = &H2
MIS_CHECKED = &H8
MIS_UNCHECKED = &H0
End Enum
Public Enum PopupAlign ' 菜单弹出对齐方式
POPUP_LEFTALIGN = &H0& ' 水平左对齐
POPUP_CENTERALIGN = &H4& ' 水平居中对齐
POPUP_RIGHTALIGN = &H8& ' 水平右对齐
POPUP_TOPALIGN = &H0& ' 垂直上对齐
POPUP_VCENTERALIGN = &H10& ' 垂直居中对齐
POPUP_BOTTOMALIGN = &H20& ' 垂直下对齐
End Enum
' 释放类
Private Sub Class_Terminate()
SetWindowLong frmMenu.hwnd, GWL_WNDPROC, preMenuWndProc
Erase MyItemInfo
DestroyMenu hMenu
End Sub
' 创建弹出式菜单
Public Sub CreateMenu()
preMenuWndProc = SetWindowLong(frmMenu.hwnd, GWL_WNDPROC, AddressOf MenuWndProc)
hMenu = CreatePopupMenu()
Me.Style = STYLE_WINDOWS
End Sub
' 插入菜单项并保存自定义菜单项数组, 设置Owner_Draw自绘菜单
Public Sub AddItem(ByVal itemAlias As String, ByVal itemIcon As StdPicture,
ByVal itemText As String, ByVal itemType As MenuItemType,
Optional ByVal itemState As MenuItemState)
Static ID As Long, i As Long
Dim ItemInfo As MENUITEMINFO
' 插入菜单项
With ItemInfo
.cbSize = LenB(ItemInfo)
.fMask = MIIM_STRING Or MIIM_FTYPE Or MIIM_STATE Or
MIIM_SUBMENU Or MIIM_ID Or MIIM_DATA
.fType = itemType
.fState = itemState
.wID = ID
.dwItemData = True
.cch = lstrlen(itemText)
.dwTypeData = itemText
End With
InsertMenuItem hMenu, ID, False, ItemInfo
' 将菜单项数据存入动态数组
ReDim Preserve MyItemInfo(ID) As MyMenuItemInfo
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
Class_Terminate
Err.Raise vbObjectError + 513, "cMenu", "菜单项别名相同."
End If
Next i
With MyItemInfo(ID)
Set .itemIcon = itemIcon
.itemText = itemText
.itemType = itemType
.itemState = itemState
.itemAlias = itemAlias
End With
' 获得菜单项数据
With ItemInfo
.cbSize = LenB(ItemInfo)
.fMask = MIIM_DATA Or MIIM_ID Or MIIM_TYPE
End With
GetMenuItemInfo hMenu, ID, False, ItemInfo
' 设置菜单项数据
With ItemInfo
.fMask = .fMask Or MIIM_TYPE
.fType = MFT_OWNERDRAW
End With
SetMenuItemInfo hMenu, ID, False, ItemInfo
' 菜单项ID累加
ID = ID + 1
End Sub
' 删除菜单项
Public Sub DeleteItem(ByVal itemAlias As String)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
DeleteMenu hMenu, i, 0
Exit For
End If
Next i
End Sub
' 弹出菜单
Public Sub PopupMenu(ByVal x As Long, ByVal y As Long, ByVal Align As PopupAlign)
TrackPopupMenu hMenu, Align, x, y, 0, frmMenu.hwnd, ByVal 0
End Sub
' 设置菜单项图标
Public Sub SetItemIcon(ByVal itemAlias As String, ByVal itemIcon As StdPicture)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
Set MyItemInfo(i).itemIcon = itemIcon
Exit For
End If
Next i
End Sub
' 获得菜单项图标
Public Function GetItemIcon(ByVal itemAlias As String) As StdPicture
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
Set GetItemIcon = MyItemInfo(i).itemIcon
Exit For
End If
Next i
End Function
' 设置菜单项文字
Public Sub SetItemText(ByVal itemAlias As String, ByVal itemText As String)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
MyItemInfo(i).itemText = itemText
Exit For
End If
Next i
End Sub
' 获得菜单项文字
Public Function GetItemText(ByVal itemAlias As String) As String
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
GetItemText = MyItemInfo(i).itemText
Exit For
End If
Next i
End Function' 设置菜单项状态
Public Sub SetItemState(ByVal itemAlias As String, ByVal itemState As MenuItemState)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
MyItemInfo(i).itemState = itemState
Dim ItemInfo As MENUITEMINFO
With ItemInfo
.cbSize = Len(ItemInfo)
.fMask = MIIM_STRING Or MIIM_FTYPE Or MIIM_STATE Or
MIIM_SUBMENU Or MIIM_ID Or MIIM_DATA
End With
GetMenuItemInfo hMenu, i, False, ItemInfo
With ItemInfo
.fState = .fState Or itemState
End With
SetMenuItemInfo hMenu, i, False, ItemInfo
Exit For
End If
Next i
End Sub
' 获得菜单项状态
Public Function GetItemState(ByVal itemAlias As String) As MenuItemState
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
GetItemState = MyItemInfo(i).itemState
Exit For
End If
Next i
End Function
' 属性: 菜单句柄
Public Property Get hwnd() As Long
hwnd = hMenu
End Property
Public Property Let hwnd(ByVal nValue As Long)
End Property
' 属性: 菜单附加条宽度
Public Property Get LeftBarWidth() As Long
LeftBarWidth = BarWidth
End Property
Public Property Let LeftBarWidth(ByVal nBarWidth As Long)
If nBarWidth >= 0 Then
BarWidth = nBarWidth
End If
End Property
' 属性: 菜单附加条风格
Public Property Get LeftBarStyle() As MenuLeftBarStyle
LeftBarStyle = BarStyle
End Property
Public Property Let LeftBarStyle(ByVal nBarStyle As MenuLeftBarStyle)
If nBarStyle >= 0 And nBarStyle >= 4 Then
BarStyle = nBarStyle
End If
End Property
' 属性: 菜单附加条图像(只有当 LeftBarStyle 设置为 LBS_IMAGE 时才有效)
Public Property Get LeftBarImage() As StdPicture
Set LeftBarImage = BarImage
End Property
Public Property Let LeftBarImage(ByVal nBarImage As StdPicture)
Set BarImage = nBarImage
End Property
' 属性: 菜单附加条过渡色起始颜色(只有当 LeftBarStyle 设置为 LBS_HORIZONTALCOLOR 或 LBS_VERTICALCOLOR 时才有效)
' 当 LeftBarStyle 设置为 LBS_SOLIDCOLOR (实色填充)时以 LeftBarStartColor 颜色为准
Public Property Get LeftBarStartColor() As Long
LeftBarStartColor = BarStartColor
End Property
Public Property Let LeftBarStartColor(ByVal nBarStartColor As Long)
BarStartColor = nBarStartColor
End Property
' 属性: 菜单附加条过渡色终止颜色(只有当 LeftBarStyle 设置为 LBS_HORIZONTALCOLOR 或 LBS_VERTICALCOLOR 时才有效)
' 当 LeftBarStyle 设置为 LBS_SOLIDCOLOR (实色填充)时以 LeftBarStartColor 颜色为准
Public Property Get LeftBarEndColor() As Long
LeftBarEndColor = BarEndColor
End Property
Public Property Let LeftBarEndColor(ByVal nBarEndColor As Long)
BarEndColor = nBarEndColor
End Property
' 属性: 菜单项高亮条的范围
Public Property Get ItemSelectScope() As MenuItemSelectScope
ItemSelectScope = SelectScope
End Property
Public Property Let ItemSelectScope(ByVal nSelectScope As MenuItemSelectScope)
SelectScope = nSelectScope
End Property
' 属性: 菜单项可用时文字颜色
Public Property Get ItemTextEnabledColor() As Long
ItemTextEnabledColor = TextEnabledColor
End Property
Public Property Let ItemTextEnabledColor(ByVal nTextEnabledColor As Long)
TextEnabledColor = nTextEnabledColor
End Property
' 属性: 菜单项不可用时文字颜色
Public Property Get ItemTextDisabledColor() As Long
ItemTextDisabledColor = TextDisabledColor
End Property
Public Property Let ItemTextDisabledColor(ByVal nTextDisabledColor As Long)
TextDisabledColor = nTextDisabledColor
End Property
' 属性: 菜单项选中时文字颜色
Public Property Get ItemTextSelectColor() As Long
ItemTextSelectColor = TextSelectColor
End Property
Public Property Let ItemTextSelectColor(ByVal nTextSelectColor As Long)
TextSelectColor = nTextSelectColor
End Property
' 属性: 菜单项图标风格
Public Property Get ItemIconStyle() As MenuItemIconStyle
ItemIconStyle = IconStyle
End Property
Public Property Let ItemIconStyle(ByVal nIconStyle As MenuItemIconStyle)
IconStyle = nIconStyle
End Property
' 属性: 菜单项边框风格
Public Property Get ItemSelectEdgeStyle() As MenuItemSelectEdgeStyle
ItemSelectEdgeStyle = EdgeStyle
End Property
Public Property Let ItemSelectEdgeStyle(ByVal nEdgeStyle As MenuItemSelectEdgeStyle)
EdgeStyle = nEdgeStyle
End Property
' 属性: 菜单项边框颜色
Public Property Get ItemSelectEdgeColor() As Long
ItemSelectEdgeColor = EdgeColor
End Property
Public Property Let ItemSelectEdgeColor(ByVal nEdgeColor As Long)
EdgeColor = nEdgeColor
End Property
' 属性: 菜单项背景填充风格
Public Property Get ItemSelectFillStyle() As MenuItemSelectFillStyle
ItemSelectFillStyle = FillStyle
End Property
Public Property Let ItemSelectFillStyle(ByVal nFillStyle As MenuItemSelectFillStyle)
FillStyle = nFillStyle
End Property
' 属性: 菜单项过渡色起始颜色(只有当 ItemSelectFillStyle 设置为 ISFS_HORIZONTALCOLOR 或 ISFS_VERTICALCOLOR 时才有效)
' 当 ItemSelectFillStyle 设置为 ISFS_SOLIDCOLOR (实色填充)时以 ItemSelectFillStartColor 颜色为准
Public Property Get ItemSelectFillStartColor() As Long
ItemSelectFillStartColor = FillStartColor
End Property
Public Property Let ItemSelectFillStartColor(ByVal nFillStartColor As Long)
FillStartColor = nFillStartColor
End Property
' 属性: 菜单项过渡色终止颜色(只有当 ItemSelectFillStyle 设置为 ISFS_HORIZONTALCOLOR 或 ISFS_VERTICALCOLOR 时才有效)
' 当 ItemSelectFillStyle 设置为 ISFS_SOLIDCOLOR (实色填充)时以 ItemSelectFillStartColor 颜色为准
Public Property Get ItemSelectFillEndColor() As Long
ItemSelectFillEndColor = FillEndColor
End Property
Public Property Let ItemSelectFillEndColor(ByVal nFillEndColor As Long)
FillEndColor = nFillEndColor
End Property
' 属性: 菜单背景颜色
Public Property Get BackColor() As Long
BackColor = BkColor
End Property
Public Property Let BackColor(ByVal nBkColor As Long)
BkColor = nBkColor
End Property
' 属性: 菜单分隔条风格
Public Property Get SeparatorStyle() As MenuSeparatorStyle
SeparatorStyle = SepStyle
End Property
Public Property Let SeparatorStyle(ByVal nSepStyle As MenuSeparatorStyle)
SepStyle = nSepStyle
End Property
' 属性: 菜单分隔条颜色
Public Property Get SeparatorColor() As Long
SeparatorColor = SepColor
End Property
Public Property Let SeparatorColor(ByVal nSepColor As Long)
SepColor = nSepColor
End Property
' 属性: 菜单总体风格
Public Property Get Style() As MenuUserStyle
Style = MenuStyle
End Property
Public Property Let Style(ByVal nMenuStyle As MenuUserStyle)
MenuStyle = nMenuStyle
Select Case nMenuStyle
Case STYLE_WINDOWS ' Windows 默认风格
Set BarImage = LoadPicture()
BarWidth = 20
BarStyle = LBS_NONE
BarStartColor = GetSysColor(COLOR_MENU)
BarEndColor = BarStartColor
SelectScope = ISS_ICON_TEXT
TextEnabledColor = GetSysColor(COLOR_MENUTEXT)
TextDisabledColor = GetSysColor(COLOR_GRAYTEXT)
TextSelectColor = GetSysColor(COLOR_HIGHLIGHTTEXT)
IconStyle = IIS_NONE
EdgeStyle = ISES_SOLID
EdgeColor = GetSysColor(COLOR_HIGHLIGHT)
FillStyle = ISFS_SOLIDCOLOR
FillStartColor = EdgeColor
FillEndColor = FillStartColor
BkColor = GetSysColor(COLOR_MENU)
SepColor = TextDisabledColor
SepStyle = MSS_DEFAULT
Case STYLE_XP ' XP 风格
Set BarImage = LoadPicture()
BarWidth = 20
BarStyle = LBS_NONE
BarStartColor = GetSysColor(COLOR_MENU)
BarEndColor = BarStartColor
SelectScope = ISS_ICON_TEXT
TextEnabledColor = GetSysColor(COLOR_MENUTEXT)
TextDisabledColor = GetSysColor(COLOR_GRAYTEXT)
TextSelectColor = TextEnabledColor
IconStyle = IIS_SHADOW
EdgeStyle = ISES_SOLID
EdgeColor = RGB(49, 106, 197)
FillStyle = ISFS_SOLIDCOLOR
FillStartColor = RGB(180, 195, 210)
FillEndColor = FillStartColor
BkColor = GetSysColor(COLOR_MENU)
SepColor = RGB(192, 192, 192)
SepStyle = MSS_SOLID
Case STYLE_SHADE ' 渐变风格
Set BarImage = LoadPicture()
BarWidth = 20
BarStyle = LBS_VERTICALCOLOR
BarStartColor = vbBlack
BarEndColor = vbWhite
SelectScope = ISS_ICON_TEXT
TextEnabledColor = GetSysColor(COLOR_MENUTEXT)
TextDisabledColor = GetSysColor(COLOR_GRAYTEXT)
TextSelectColor = GetSysColor(COLOR_HIGHLIGHTTEXT)
IconStyle = IIS_NONE
EdgeStyle = ISES_NONE
EdgeColor = GetSysColor(COLOR_HIGHLIGHT)
FillStyle = ISFS_HORIZONTALCOLOR
FillStartColor = vbBlack
FillEndColor = vbWhite
BkColor = GetSysColor(COLOR_MENU)
SepColor = TextDisabledColor
SepStyle = MSS_DEFAULT
Case STYLE_3D ' 3D 立体风格
Set BarImage = LoadPicture()
BarWidth = 20
BarStyle = LBS_NONE
BarStartColor = GetSysColor(COLOR_MENU)
BarEndColor = BarStartColor
SelectScope = ISS_TEXT
TextEnabledColor = GetSysColor(COLOR_MENUTEXT)
TextDisabledColor = GetSysColor(COLOR_GRAYTEXT)
TextSelectColor = vbBlue
IconStyle = IIS_RAISED
EdgeStyle = ISES_SUNKEN
EdgeColor = GetSysColor(COLOR_HIGHLIGHT)
FillStyle = ISFS_NONE
FillStartColor = EdgeColor
FillEndColor = FillStartColor
BkColor = GetSysColor(COLOR_MENU)
SepColor = TextDisabledColor
SepStyle = MSS_DEFAULT
Case STYLE_COLORFUL ' 炫彩风格
Set BarImage = frmMenu.Picture
BarWidth = 20
BarStyle = LBS_IMAGE
BarStartColor = GetSysColor(COLOR_MENU)
BarEndColor = BarStartColor
SelectScope = ISS_ICON_TEXT
TextEnabledColor = vbBlue
TextDisabledColor = RGB(49, 106, 197)
TextSelectColor = vbRed
IconStyle = IIS_NONE
EdgeStyle = ISES_DOT
EdgeColor = vbBlack
FillStyle = ISFS_VERTICALCOLOR
FillStartColor = vbYellow
FillEndColor = vbGreen
BkColor = RGB(230, 230, 255)
SepColor = vbMagenta
SepStyle = MSS_DASHDOTDOT
End Select
End Property
这个类模块中包含了各种属性和方法及关于菜单的一些枚举类型，我想强调的有以下几点：
1、在CreateMenu方法中用SetWindowLong重新定义了frmMenu的窗口入口函数的地址，MenuWndProc是标准模块中的一个函数，就是处理消息的那个函数。
2、AddItem这个方法是添加菜单项的，使用一个叫做MyItemInfo的动态数组存储菜单项的内容，在“画”菜单项的时候要用到它。在AddItem方法的最后，将菜单项的fType设置成了MFT_OWNERDRAW，也就是物主绘图，这一步最关键，因为将菜单项设置成了Owner Draw，Windows将不会替我们写字，不会替我们画图标，一切都由我们自己来。
3、在PopupMenu方法中，调用了API函数中的TrackPopupMenu，看到第6个参数了吗？将处理菜单消息的窗口设置成了frmMenu，而我们又对frmMenu进行了子类处理，一切都在我们的掌握之中。
4、记得要在Class_Terminate中还原frmMenu的窗口入口函数的地址，并释放和菜单相关的资源。
好了，类模块已经OK了，大家可能对这个菜单类有了更多的了解，也看到了它的属性和方法。怎么样？还算比较丰富吧。如果觉得不够丰富的话，自己加就好了，呵呵。不过，最核心的部分还不在这里，而是在那个处理消息的函数，也就是MenuWndProc，它将完成复杂地“画”菜单的任务以及处理各种菜单事件。看看右边的滚动条，已经够窄了，下一篇再讨论吧。 :)
源代码下载：点击这里下载(28K, winzip压缩文件)现在到了最关键，最精彩，也是最复杂的部分了。我们最关心的就是怎样“画”菜单，怎样处理菜单事件，在MenuWndProc这个处理消息的函数里，我们要处理如下消息：WM_COMMAND（单击菜单项），WM_MEASUREITEM（处理菜单高度和宽度），WM_MENUSELECT（选择菜单项），WM_DRAWITEM（绘制菜单项）。
打开上次建好的工程，添加一个标准模块，并将其名称设置为mMenu，代码如下：
'*****************************************************
'* 本模块配合 cMenu 菜单类模块
'*
'* 版权: LPP软件工作室
'* 作者: 卢培培(goodname008)
'* (******* 复制请保留以上信息 *******)
'*****************************************************
Option Explicit
'-=-=-=-=-=-=-=-=-=-=-=-=-=- API 函数声明 -=-=-=-=-=-=-=-=-=-=-=-=-=-Public Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long,
ByVal x As Long, ByVal y As Long, ByVal nWidth As Long,
ByVal nHeight As Long, ByVal hSrcDC As Long,
ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Public Declare Function CallWindowProc Lib "user32" Alias
"CallWindowProcA" (ByVal lpPrevWndFunc As Long,
ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long,
ByVal lParam As Long) As Long
Public Declare Function CreateCompatibleDC Lib "gdi32"
(ByVal hdc As Long) As Long
Public Declare Function CreatePen Lib "gdi32" (ByVal nPenStyle As Long,
ByVal nWidth As Long, ByVal crColor As Long) As Long
Public Declare Function CreatePopupMenu Lib "user32" () As Long
Public Declare Function CreateSolidBrush Lib "gdi32"
(ByVal crColor As Long) As Long
Public Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Public Declare Function DeleteMenu Lib "user32" (ByVal hMenu As Long,
ByVal nPosition As Long, ByVal wFlags As Long) As Long
Public Declare Function DeleteObject Lib "gdi32"
(ByVal hObject As Long) As Long
Public Declare Function DestroyMenu Lib "user32"
(ByVal hMenu As Long) As Long
Public Declare Function DrawEdge Lib "user32" (ByVal hdc As Long,
qrc As RECT, ByVal edge As Long, ByVal grfFlags As Long) As Long
Public Declare Function DrawIconEx Lib "user32" (ByVal hdc As Long,
ByVal xLeft As Long, ByVal yTop As Long, ByVal hIcon As Long,
ByVal cxWidth As Long,
ByVal cyWidth As Long, ByVal istepIfAniCur As Long,
ByVal hbrFlickerFreeDraw As Long, ByVal diFlags As Long) As Long
Public Declare Function DrawState Lib "user32" Alias "DrawStateA"
(ByVal hdc As Long, ByVal hBrush As Long, ByVal lpDrawStateProc As Long,
ByVal lParam As Long, ByVal wParam As Long, ByVal n1 As Long,
ByVal n2 As Long, ByVal n3 As Long, ByVal n4 As Long,
ByVal un As Long) As Long
Public Declare Function DrawText Lib "user32" Alias "DrawTextA"
(ByVal hdc As Long, ByVal lpStr As String, ByVal nCount As Long,
lpRect As RECT, ByVal wFormat As Long) As Long
Public Declare Function FillRect Lib "user32" (ByVal hdc As Long,
lpRect As RECT, ByVal hBrush As Long) As Long
Public Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function GetMenuItemCount Lib "user32"
(ByVal hMenu As Long) As Long
Public Declare Function GetMenuItemID Lib "user32" (ByVal hMenu As Long,
ByVal nPos As Long) As Long
Public Declare Function GetMenuItemInfo Lib "user32" Alias "GetMenuItemInfoA"
(ByVal hMenu As Long, ByVal un As Long, ByVal b As Long,
lpMenuItemInfo As MENUITEMINFO) As Long
Public Declare Function GetSysColor Lib "user32" (ByVal nIndex As Long) As Long
Public Declare Function GetSystemMetrics Lib "user32"
(ByVal nIndex As Long) As Long
Public Declare Function InflateRect Lib "user32" (lpRect As RECT,
ByVal x As Long, ByVal y As Long) As Long
Public Declare Function InsertMenuItem Lib "user32" Alias "InsertMenuItemA"
(ByVal hMenu As Long, ByVal un As Long, ByVal bool As Boolean,
ByRef lpcMenuItemInfo As MENUITEMINFO) As Long
Public Declare Function LineTo Lib "gdi32" (ByVal hdc As Long, ByVal x As Long,
ByVal y As Long) As Long
Public Declare Function lstrlen Lib "kernel32" Alias "lstrlenA"
(ByVal lpString As String) As Long
Public Declare Function MoveToEx Lib "gdi32" (ByVal hdc As Long,
ByVal x As Long, ByVal y As Long, lpPoint As Long) As Long
Public Declare Function Rectangle Lib "gdi32" (ByVal hdc As Long,
ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long)
As Long
Public Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long,
ByVal hdc As Long) As Long
Public Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long,
ByVal hObject As Long) As Long
Public Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long,
lParam As Any) As Long
Public Declare Function SetBkMode Lib "gdi32" (ByVal hdc As Long,
ByVal nBkMode As Long) As Long
Public Declare Function SetMenuItemInfo Lib "user32" Alias
"SetMenuItemInfoA" (ByVal hMenu As Long, ByVal un As Long,
ByVal bool As Boolean, lpcMenuItemInfo As MENUITEMINFO) As Long
Public Declare Function SetTextColor Lib "gdi32" (ByVal hdc As Long,
ByVal crColor As Long) As Long
Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA"
(ByVal hwnd As Long, ByVal nIndex As Long,
ByVal dwNewLong As Long) As Long
Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory"
(Destination As Any, Source As Any, ByVal Length As Long)
' -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-API 常量声明 -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Public Const GWL_WNDPROC = (-4) ' SetWindowLong 设置窗口函数入口地址
Public Const SM_CYMENU = 15 ' GetSystemMetrics 获得系统菜单项高度
Public Const WM_COMMAND = &H111 ' 消息: 单击菜单项
Public Const WM_DRAWITEM = &H2B ' 消息: 绘制菜单项
Public Const WM_EXITMENULOOP = &H212 ' 消息: 退出菜单消息循环
Public Const WM_MEASUREITEM = &H2C ' 消息: 处理菜单高度和宽度
Public Const WM_MENUSELECT = &H11F ' 消息: 选择菜单项
' ODT
Public Const ODT_MENU = 1 ' 菜单
Public Const ODT_LISTBOX = 2 ' 列表框
Public Const ODT_COMBOBOX = 3 ' 组合框
Public Const ODT_BUTTON = 4 ' 按钮
' ODS
Public Const ODS_SELECTED = &H1 ' 菜单被选择
Public Const ODS_GRAYED = &H2 ' 灰色字
Public Const ODS_DISABLED = &H4 ' 禁用
Public Const ODS_CHECKED = &H8 ' 选中
Public Const ODS_FOCUS = &H10 ' 聚焦
' diFlags to DrawIconEx
Public Const DI_MASK = &H1 ' 绘图时使用图标的MASK部分 (如单独使用, 可获得图标的掩模)
Public Const DI_IMAGE = &H2 ' 绘图时使用图标的XOR部分 (即图标没有透明区域)
Public Const DI_NORMAL = DI_MASK Or DI_IMAGE ' 用常规方式绘图 (合并 DI_IMAGE 和 DI_MASK)
' nBkMode to SetBkMode
Public Const TRANSPARENT = 1 ' 透明处理, 即不作上述填充
Public Const OPAQUE = 2 ' 用当前的背景色填充虚线画笔、阴影刷子以及字符的空隙
Public Const NEWTRANSPARENT = 3 ' 在有颜色的菜单上画透明文字
' MF 菜单相关常数
Public Const MF_BYCOMMAND = &H0& ' 菜单条目由菜单的命令ID指定
Public Const MF_BYPOSITION = &H400& ' 菜单条目由条目在菜单中的位置决定 (零代表菜单中的第一个条目)
Public Const MF_CHECKED = &H8& ' 检查指定的菜单条目 (不能与VB的Checked属性兼容)
Public Const MF_DISABLED = &H2& ' 禁止指定的菜单条目 (不与VB的Enabled属性兼容)
Public Const MF_ENABLED = &H0& ' 允许指定的菜单条目 (不与VB的Enabled属性兼容)
Public Const MF_GRAYED = &H1& ' 禁止指定的菜单条目, 并用浅灰色描述它. (不与VB的Enabled属性兼容)
Public Const MF_HILITE = &H80&
Public Const MF_SEPARATOR = &H800& ' 在指定的条目处显示一条分隔线
Public Const MF_STRING = &H0& ' 在指定的条目处放置一个字串 (不与VB的Caption属性兼容)
Public Const MF_UNCHECKED = &H0& ' 检查指定的条目 (不能与VB的Checked属性兼容)
Public Const MF_UNHILITE = &H0&
Public Const MF_BITMAP = &H4& ' 菜单条目是一幅位图. 一旦设入菜单, 这幅位图就绝对不能删除, 所以不应该使用由VB的Image属性返回的值.
Public Const MF_OWNERDRAW = &H100& ' 创建一个物主绘图菜单 (由您设计的程序负责描绘每个菜单条目)
Public Const MF_USECHECKBITMAPS = &H200&
Public Const MF_MENUBARBREAK = &H20& ' 在弹出式菜单中, 将指定的条目放置于一个新列, 并用一条垂直线分隔不同的列.
Public Const MF_MENUBREAK = &H40& ' 在弹出式菜单中, 将指定的条目放置于一个新列. 在顶级菜单中, 将条目放置到一个新行.
Public Const MF_POPUP = &H10& ' 将一个弹出式菜单置于指定的条目, 可用于创建子菜单及弹出式菜单.
Public Const MF_HELP = &H4000&
Public Const MF_DEFAULT = &H1000
Public Const MF_RIGHTJUSTIFY = &H4000
' fMask To InsertMenuItem ' 指定 MENUITEMINFO 中哪些成员有效
Public Const MIIM_STATE = &H1
Public Const MIIM_ID = &H2
Public Const MIIM_SUBMENU = &H4
Public Const MIIM_CHECKMARKS = &H8
Public Const MIIM_TYPE = &H10
Public Const MIIM_DATA = &H20
Public Const MIIM_STRING = &H40
Public Const MIIM_BITMAP = &H80
Public Const MIIM_FTYPE = &H100
' fType To InsertMenuItem ' MENUITEMINFO 中菜单项类型
Public Const MFT_BITMAP = &H4&
Public Const MFT_MENUBARBREAK = &H20&
Public Const MFT_MENUBREAK = &H40&
Public Const MFT_OWNERDRAW = &H100&
Public Const MFT_SEPARATOR = &H800&
Public Const MFT_STRING = &H0&
' fState to InsertMenuItem ' MENUITEMINFO 中菜单项状态
Public Const MFS_CHECKED = &H8&
Public Const MFS_DISABLED = &H2&
Public Const MFS_ENABLED = &H0&
Public Const MFS_GRAYED = &H1&
Public Const MFS_HILITE = &H80&
Public Const MFS_UNCHECKED = &H0&
Public Const MFS_UNHILITE = &H0&
' nFormat to DrawText
Public Const DT_LEFT = &H0 ' 水平左对齐
Public Const DT_CENTER = &H1 ' 水平居中对齐
Public Const DT_RIGHT = &H2 ' 水平右对齐
Public Const DT_SINGLELINE = &H20 ' 单行
Public Const DT_TOP = &H0 ' 垂直上对齐 (仅单行时有效)
Public Const DT_VCENTER = &H4 ' 垂直居中对齐 (仅单行时有效)
Public Const DT_BOTTOM = &H8 ' 垂直下对齐 (仅单行时有效)
Public Const DT_CALCRECT = &H400 ' 多行绘图时矩形的底边根据需要进行延展, 以便容下所有文字; 单行绘图时, 延展矩形的右侧, 不描绘文字, 由lpRect参数指定的矩形会载入计算出来的值.
Public Const DT_WORDBREAK = &H10 ' 进行自动换行. 如用SetTextAlign函数设置了TA_UPDATECP标志, 这里的设置则无效.
Public Const DT_NOCLIP = &H100 ' 描绘文字时不剪切到指定的矩形
Public Const DT_NOPREFIX = &H800 ' 通常, 函数认为 & 字符表示应为下一个字符加上下划线, 该标志禁止这种行为.
Public Const DT_EXPANDTABS = &H40 ' 描绘文字的时候, 对制表站进行扩展. 默认的制表站间距是8个字符. 但是, 可用DT_TABSTOP标志改变这项设定.
Public Const DT_TABSTOP = &H80 ' 指定新的制表站间距, 采用这个整数的高 8 位.
Public Const DT_EXTERNALLEADING = &H200 ' 计算文本行高度的时候, 使用当前字体的外部间距属性.
' nIndex to GetSysColor 标准: 0--20
Public Const COLOR_ACTIVEBORDER = 10 ' 活动窗口的边框
Public Const COLOR_ACTIVECAPTION = 2 ' 活动窗口的标题
Public Const COLOR_APPWORKSPACE = 12 ' MDI桌面的背景
Public Const COLOR_BACKGROUND = 1 ' Windows 桌面
Public Const COLOR_BTNFACE = 15 ' 按钮
Public Const COLOR_BTNHIGHLIGHT = 20 ' 按钮的3D加亮区
Public Const COLOR_BTNSHADOW = 16 ' 按钮的3D阴影
Public Const COLOR_BTNTEXT = 18 ' 按钮文字
Public Const COLOR_CAPTIONTEXT = 9 ' 窗口标题中的文字
Public Const COLOR_GRAYTEXT = 17 ' 灰色文字; 如使用了抖动技术则为零
Public Const COLOR_HIGHLIGHT = 13 ' 选定的项目背景
Public Const COLOR_HIGHLIGHTTEXT = 14 ' 选定的项目文字
Public Const COLOR_INACTIVEBORDER = 11 ' 不活动窗口的边框
Public Const COLOR_INACTIVECAPTION = 3 ' 不活动窗口的标题
Public Const COLOR_INACTIVECAPTIONTEXT = 19 ' 不活动窗口的文字
Public Const COLOR_MENU = 4 ' 菜单
Public Const COLOR_MENUTEXT = 7 ' 菜单文字
Public Const COLOR_SCROLLBAR = 0 ' 滚动条
Public Const COLOR_WINDOW = 5 ' 窗口背景
Public Const COLOR_WINDOWFRAME = 6 ' 窗框
Public Const COLOR_WINDOWTEXT = 8 ' 窗口文字
' un to DrawState
Public Const DST_COMPLEX = &H0 ' 绘图在由lpDrawStateProc参数指定的回调函数期间执行, lParam和wParam会传递给回调事件.
Public Const DST_TEXT = &H1 ' lParam代表文字的地址(可使用一个字串别名),wParam代表字串的长度.
Public Const DST_PREFIXTEXT = &H2 ' 与DST_TEXT类似, 只是 & 字符指出为下各字符加上下划线.
Public Const DST_ICON = &H3 ' lParam包括图标的句柄
Public Const DST_BITMAP = &H4 ' lParam包括位图的句柄
Public Const DSS_NORMAL = &H0 ' 普通图像
Public Const DSS_UNION = &H10 ' 图像进行抖动处理
Public Const DSS_DISABLED = &H20 ' 图象具有浮雕效果
Public Const DSS_MONO = &H80 ' 用hBrush描绘图像
Public Const DSS_RIGHT = &H8000 ' 无任何作用
' edge to DrawEdge
Public Const BDR_RAISEDOUTER = &H1 ' 外层凸
Public Const BDR_SUNKENOUTER = &H2 ' 外层凹
Public Const BDR_RAISEDINNER = &H4 ' 内层凸
Public Const BDR_SUNKENINNER = &H8 ' 内层凹
Public Const BDR_OUTER = &H3
Public Const BDR_RAISED = &H5
Public Const BDR_SUNKEN = &HA
Public Const BDR_INNER = &HC
Public Const EDGE_BUMP = (BDR_RAISEDOUTER Or BDR_SUNKENINNER)
Public Const EDGE_ETCHED = (BDR_SUNKENOUTER Or BDR_RAISEDINNER)
Public Const EDGE_RAISED = (BDR_RAISEDOUTER Or BDR_RAISEDINNER)
Public Const EDGE_SUNKEN = (BDR_SUNKENOUTER Or BDR_SUNKENINNER)
' grfFlags to DrawEdge
Public Const BF_LEFT = &H1 ' 左边缘
Public Const BF_TOP = &H2 ' 上边缘
Public Const BF_RIGHT = &H4 ' 右边缘
Public Const BF_BOTTOM = &H8 ' 下边缘
Public Const BF_DIAGONAL = &H10 ' 对角线
Public Const BF_MIDDLE = &H800 ' 填充矩形内部
Public Const BF_SOFT = &H1000 ' MSDN: Soft buttons instead of tiles.
Public Const BF_ADJUST = &H2000 ' 调整矩形, 预留客户区
Public Const BF_FLAT = &H4000 ' 平面边缘
Public Const BF_MONO = &H8000 ' 一维边缘
Public Const BF_RECT = (BF_LEFT Or BF_TOP Or BF_RIGHT Or BF_BOTTOM)
Public Const BF_TOPLEFT = (BF_TOP Or BF_LEFT)
Public Const BF_TOPRIGHT = (BF_TOP Or BF_RIGHT)
Public Const BF_BOTTOMLEFT = (BF_BOTTOM Or BF_LEFT)
Public Const BF_BOTTOMRIGHT = (BF_BOTTOM Or BF_RIGHT)
Public Const BF_DIAGONAL_ENDTOPLEFT = (BF_DIAGONAL Or BF_TOP Or BF_LEFT)
Public Const BF_DIAGONAL_ENDTOPRIGHT = (BF_DIAGONAL Or BF_TOP Or BF_RIGHT)
Public Const BF_DIAGONAL_ENDBOTTOMLEFT = (BF_DIAGONAL Or BF_BOTTOM Or BF_LEFT)
Public Const BF_DIAGONAL_ENDBOTTOMRIGHT = (BF_DIAGONAL Or BF_BOTTOM Or BF_RIGHT)
' nPenStyle to CreatePen
Public Const PS_DASH = 1 ' 画笔类型:虚线 (nWidth必须是1) -------
Public Const PS_DASHDOT = 3 ' 画笔类型:点划线 (nWidth必须是1) _._._._
Public Const PS_DASHDOTDOT = 4 ' 画笔类型:点-点-划线 (nWidth必须是1) _.._.._
Public Const PS_DOT = 2 ' 画笔类型:点线 (nWidth必须是1) .......
Public Const PS_SOLID = 0 ' 画笔类型:实线 _______
' -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- API 类型声明 -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Public Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Public Type DRAWITEMSTRUCT
CtlType As Long
CtlID As Long
itemID As Long
itemAction As Long
itemState As Long
hwndItem As Long
hdc As Long
rcItem As RECT
itemData As Long
End Type
Public Type MENUITEMINFO
cbSize As Long
fMask As Long
fType As Long
fState As Long
wID As Long
hSubMenu As Long
hbmpChecked As Long
hbmpUnchecked As Long
dwItemData As Long
dwTypeData As String
cch As Long
End Type
Public Type MEASUREITEMSTRUCT
CtlType As Long
CtlID As Long
itemID As Long
itemWidth As Long
itemHeight As Long
itemData As Long
End Type
Public Type Size
cx As Long
cy As Long
End Type
' 自定义菜单项数据结构
Public Type MyMenuItemInfo
itemIcon As StdPicture
itemAlias As String
itemText As String
itemType As MenuItemType
itemState As MenuItemState
End Type
' 菜单相关结构
Private MeasureInfo As MEASUREITEMSTRUCT
Private DrawInfo As DRAWITEMSTRUCT
Public hMenu As Long
Public preMenuWndProc As Long
Public MyItemInfo() As MyMenuItemInfo
' 菜单类属性
Public BarWidth As Long ' 菜单附加条宽度
Public BarStyle As MenuLeftBarStyle ' 菜单附加条风格
Public BarImage As StdPicture ' 菜单附加条图像
Public BarStartColor As Long ' 菜单附加条过渡色起始颜色
Public BarEndColor As Long ' 菜单附加条过渡色终止颜色
Public SelectScope As MenuItemSelectScope ' 菜单项高亮条的范围
Public TextEnabledColor As Long ' 菜单项可用时文字颜色
Public TextDisabledColor As Long ' 菜单项不可用时文字颜色
Public TextSelectColor As Long ' 菜单项选中时文字颜色
Public IconStyle As MenuItemIconStyle ' 菜单项图标风格
Public EdgeStyle As MenuItemSelectEdgeStyle ' 菜单项边框风格
Public EdgeColor As Long ' 菜单项边框颜色
Public FillStyle As MenuItemSelectFillStyle ' 菜单项背景填充风格
Public FillStartColor As Long ' 菜单项过渡色起始颜色
Public FillEndColor As Long ' 菜单项过渡色终止颜色
Public BkColor As Long ' 菜单背景颜色
Public SepStyle As MenuSeparatorStyle ' 菜单分隔条风格
Public SepColor As Long ' 菜单分隔条颜色
Public MenuStyle As MenuUserStyle ' 菜单总体风格
' 拦截菜单消息 (frmMenu 窗口入口函数)
Function MenuWndProc(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Select Case Msg
Case WM_COMMAND ' 单击菜单项
If MyItemInfo(wParam).itemType = MIT_CHECKBOX Then
If MyItemInfo(wParam).itemState = MIS_CHECKED Then
MyItemInfo(wParam).itemState = MIS_UNCHECKED
Else
MyItemInfo(wParam).itemState = MIS_CHECKED
End If
End If
MenuItemSelected wParam
Case WM_EXITMENULOOP ' 退出菜单消息循环(保留)
Case WM_MEASUREITEM ' 处理菜单项高度和宽度
MeasureItem hwnd, lParam
Case WM_MENUSELECT ' 选择菜单项
Dim itemID As Long
itemID = GetMenuItemID(lParam, wParam And &HFF)
If itemID -1 Then
MenuItemSelecting itemID
End If
Case WM_DRAWITEM ' 绘制菜单项
DrawItem lParam
End Select
MenuWndProc = CallWindowProc(preMenuWndProc, hwnd, Msg, wParam, lParam)
End Function
' 处理菜单高度和宽度
Private Sub MeasureItem(ByVal hwnd As Long, ByVal lParam As Long)
Dim TextSize As Size, hdc As Long
hdc = GetDC(hwnd)
CopyMemory MeasureInfo, ByVal lParam, Len(MeasureInfo)
If MeasureInfo.CtlType And ODT_MENU Then
MeasureInfo.itemWidth = lstrlen(MyItemInfo(MeasureInfo.itemID).itemText) * (GetSystemMetrics(SM_CYMENU) / 2.5) + BarWidth
If MyItemInfo(MeasureInfo.itemID).itemType MIT_SEPARATOR Then
MeasureInfo.itemHeight = GetSystemMetrics(SM_CYMENU)
Else
MeasureInfo.itemHeight = 6
End If
End If
CopyMemory ByVal lParam, MeasureInfo, Len(MeasureInfo)
ReleaseDC hwnd, hdc
End Sub
' 绘制菜单项
Private Sub DrawItem(ByVal lParam As Long)
Dim hPen As Long, hBrush As Long
Dim itemRect As RECT, barRect As RECT, iconRect As RECT, textRect As RECT
Dim i As Long
CopyMemory DrawInfo, ByVal lParam, Len(DrawInfo)
If DrawInfo.CtlType = ODT_MENU Then
SetBkMode DrawInfo.hdc, TRANSPARENT
' 初始化菜单项矩形, 图标矩形, 文字矩形
itemRect = DrawInfo.rcItem
iconRect = DrawInfo.rcItem
textRect = DrawInfo.rcItem
' 设置菜单附加条矩形
With barRect
.Left = 0
.Top = 0
.Right = BarWidth - 1
For i = 0 To GetMenuItemCount(hMenu) - 1
If MyItemInfo(i).itemType = MIT_SEPARATOR Then
.Bottom = .Bottom + 6
Else
.Bottom = .Bottom + MeasureInfo.itemHeight
End If
Next i
.Bottom = .Bottom - 1
End With
' 设置图标矩形, 文字矩形
If BarStyle LBS_NONE Then iconRect.Left = barRect.Right + 2
iconRect.Right = iconRect.Left + 20
textRect.Left = iconRect.Right + 3
With DrawInfo
' 画菜单背景
itemRect.Left = barRect.Right
hBrush = CreateSolidBrush(BkColor)
FillRect .hdc, itemRect, hBrush
DeleteObject hBrush
' 画菜单左边的附加条
Dim RedArea As Long, GreenArea As Long, BlueArea As Long
Dim red As Long, green As Long, blue As Long
Select Case BarStyle
Case LBS_NONE ' 无附加条
Case LBS_SOLIDCOLOR ' 实色填充
hBrush = CreateSolidBrush(BarStartColor)
FillRect .hdc, barRect, hBrush
DeleteObject hBrush
Case LBS_HORIZONTALCOLOR ' 水平过渡色
BlueArea = Int(BarEndColor / &H10000) - Int(BarStartColor / &H10000)
GreenArea = (Int(BarEndColor / &H100) And &HFF) - (Int(BarStartColor / &H100) And &HFF)
RedArea = (BarEndColor And &HFF) - (BarStartColor And &HFF)
For i = 0 To BarWidth - 1
red = Int(BarStartColor And &HFF) + Int(i / BarWidth * RedArea)
green = (Int(BarStartColor / &H100) And &HFF) + Int(i / BarWidth * GreenArea)
blue = Int(BarStartColor / &H10000) + Int(i / BarWidth * BlueArea)
hPen = CreatePen(PS_SOLID, 1, RGB(red, green, blue))
Call SelectObject(.hdc, hPen)
Call MoveToEx(.hdc, i, 0, 0)
Call LineTo(.hdc, i, barRect.Bottom)
Call DeleteObject(hPen)
Next i
Case LBS_VERTICALCOLOR ' 垂直过渡色
BlueArea = Int(BarEndColor / &H10000) - Int(BarStartColor / &H10000)
GreenArea = (Int(BarEndColor / &H100) And &HFF) - (Int(BarStartColor / &H100) And &HFF)
RedArea = (BarEndColor And &HFF) - (BarStartColor And &HFF)
For i = 0 To barRect.Bottom
red = Int(BarStartColor And &HFF) + Int(i / (barRect.Bottom + 1) * RedArea)
green = (Int(BarStartColor / &H100) And &HFF) + Int(i / (barRect.Bottom + 1) * GreenArea)
blue = Int(BarStartColor / &H10000) + Int(i / (barRect.Bottom + 1) * BlueArea)
hPen = CreatePen(PS_SOLID, 1, RGB(red, green, blue))
Call SelectObject(.hdc, hPen)
Call MoveToEx(.hdc, 0, i, 0)
Call LineTo(.hdc, barRect.Right, i)
Call DeleteObject(hPen)
Next i
Case LBS_IMAGE ' 图像
If BarImage.Handle 0 Then
Dim barhDC As Long
barhDC = CreateCompatibleDC(GetDC(0))
SelectObject barhDC, BarImage.Handle
BitBlt .hdc, 0, 0, BarWidth, barRect.Bottom - barRect.Top + 1, barhDC, 0, 0, vbSrcCopy
DeleteDC barhDC
End If
End Select
' 画菜单项
If MyItemInfo(.itemID).itemType = MIT_SEPARATOR Then
' 画菜单分隔条(MIT_SEPARATOR)
If MyItemInfo(.itemID).itemType = MIT_SEPARATOR Then
itemRect.Top = itemRect.Top + 2
itemRect.Bottom = itemRect.Top + 1
itemRect.Left = barRect.Right + 5
Select Case SepStyle
Case MSS_NONE ' 无分隔条
Case MSS_DEFAULT ' 默认样式
DrawEdge .hdc, itemRect, EDGE_ETCHED, BF_TOP
Case Else ' 其它
hPen = CreatePen(SepStyle, 0, SepColor)
hBrush = CreateSolidBrush(BkColor)
SelectObject .hdc, hPen
SelectObject .hdc, hBrush
Rectangle .hdc, itemRect.Left, itemRect.Top, itemRect.Right, itemRect.Bottom
DeleteObject hPen
DeleteObject hBrush
End Select
End If
Else
If Not CBool(MyItemInfo(.itemID).itemState And MIS_DISABLED) Then ' 当菜单项可用时
If .itemState And ODS_SELECTED Then ' 当鼠标移动到菜单项时
' 设置菜单项高亮范围
If SelectScope And ISS_ICON_TEXT Then
itemRect.Left = iconRect.Left
ElseIf SelectScope And ISS_TEXT Then
itemRect.Left = textRect.Left - 2
Else
itemRect.Left = .rcItem.Left
End If
' 处理菜单项无图标或为CHECKBOX时的情况
If (MyItemInfo(.itemID).itemType = MIT_CHECKBOX Or MyItemInfo(.itemID).itemIcon = 0) And SelectScope ISS_LEFTBAR_ICON_TEXT Then
itemRect.Left = iconRect.Left
End If
' 画菜单项边框
Select Case EdgeStyle
Case ISES_NONE ' 无边框
Case ISES_SUNKEN ' 凹进
DrawEdge .hdc, itemRect, BDR_SUNKENOUTER, BF_RECT
Case ISES_RAISED ' 凸起
DrawEdge .hdc, itemRect, BDR_RAISEDINNER, BF_RECT
Case Else ' 其它
hPen = CreatePen(EdgeStyle, 0, EdgeColor)
hBrush = CreateSolidBrush(BkColor)
SelectObject .hdc, hPen
SelectObject .hdc, hBrush
Rectangle .hdc, itemRect.Left, itemRect.Top, itemRect.Right, itemRect.Bottom
DeleteObject hPen
DeleteObject hBrush
End Select
' 画菜单项背景
InflateRect itemRect, -1, -1
Select Case FillStyle
Case ISFS_NONE ' 无背景
Case ISFS_HORIZONTALCOLOR ' 水平渐变色
BlueArea = Int(FillEndColor / &H10000) - Int(FillStartColor / &H10000)
GreenArea = (Int(FillEndColor / &H100) And &HFF) - (Int(FillStartColor / &H100) And &HFF)
RedArea = (FillEndColor And &HFF) - (FillStartColor And &HFF)
For i = itemRect.Left To itemRect.Right - 1
red = Int(FillStartColor And &HFF) + Int((i - itemRect.Left) / (itemRect.Right - itemRect.Left + 1) * RedArea)
green = (Int(FillStartColor / &H100) And &HFF) + Int((i - itemRect.Left) / (itemRect.Right - itemRect.Left + 1) * GreenArea)
blue = Int(FillStartColor / &H10000) + Int((i - itemRect.Left) / (itemRect.Right - itemRect.Left + 1) * BlueArea)
hPen = CreatePen(PS_SOLID, 1, RGB(red, green, blue))
Call SelectObject(.hdc, hPen)
Call MoveToEx(.hdc, i, itemRect.Top, 0)
Call LineTo(.hdc, i, itemRect.Bottom)
Call DeleteObject(hPen)
Next i
Case ISFS_VERTICALCOLOR ' 垂直渐变色
BlueArea = Int(FillEndColor / &H10000) - Int(FillStartColor / &H10000)
GreenArea = (Int(FillEndColor / &H100) And &HFF) - (Int(FillStartColor / &H100) And &HFF)
RedArea = (FillEndColor And &HFF) - (FillStartColor And &HFF)
For i = itemRect.Top To itemRect.Bottom - 1
red = Int(FillStartColor And &HFF) + Int((i - itemRect.Top) / (itemRect.Bottom - itemRect.Top + 1) * RedArea)
green = (Int(FillStartColor / &H100) And &HFF) + Int((i - itemRect.Top) / (itemRect.Bottom - itemRect.Top + 1) * GreenArea)
blue = Int(FillStartColor / &H10000) + Int((i - itemRect.Top) / (itemRect.Bottom - itemRect.Top + 1) * BlueArea)
hPen = CreatePen(PS_SOLID, 1, RGB(red, green, blue))
Call SelectObject(.hdc, hPen)
Call MoveToEx(.hdc, itemRect.Left, i, 0)
Call LineTo(.hdc, itemRect.Right, i)
Call DeleteObject(hPen)
Next i
Case ISFS_SOLIDCOLOR ' 实色填充
hPen = CreatePen(PS_SOLID, 0, FillStartColor)
hBrush = CreateSolidBrush(FillStartColor)
SelectObject .hdc, hPen
SelectObject .hdc, hBrush
Rectangle .hdc, itemRect.Left, itemRect.Top, itemRect.Right, itemRect.Bottom
DeleteObject hPen
DeleteObject hBrush
End Select
' 画菜单项文字
SetTextColor .hdc, TextSelectColor
DrawText .hdc, MyItemInfo(.itemID).itemText, -1, textRect, DT_SINGLELINE Or DT_LEFT Or DT_VCENTER
' 画菜单项图标
If MyItemInfo(.itemID).itemType MIT_CHECKBOX Then
DrawIconEx .hdc, iconRect.Left + 2, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2, MyItemInfo(.itemID).itemIcon, 16, 16, 0, 0, DI_NORMAL
Select Case IconStyle
Case IIS_NONE ' 无效果
Case IIS_SUNKEN ' 凹进
If MyItemInfo(.itemID).itemIcon 0 Then
DrawEdge .hdc, iconRect, BDR_SUNKENOUTER, BF_RECT
End If
Case IIS_RAISED ' 凸起
If MyItemInfo(.itemID).itemIcon 0 Then
DrawEdge .hdc, iconRect, BDR_RAISEDINNER, BF_RECT
End If
Case IIS_SHADOW ' 阴影
hBrush = CreateSolidBrush(RGB(128, 128, 128))
DrawState .hdc, hBrush, 0, MyItemInfo(.itemID).itemIcon, 0, iconRect.Left + 3, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2 + 1, 0, 0, DST_ICON Or DSS_MONO
DeleteObject hBrush
DrawIconEx .hdc, iconRect.Left + 1, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2 - 1, MyItemInfo(.itemID).itemIcon, 16, 16, 0, 0, DI_NORMAL
End Select
Else
' CHECKBOX型菜单项图标效果
If MyItemInfo(.itemID).itemState And MIS_CHECKED Then
DrawIconEx .hdc, iconRect.Left + 2, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2, MyItemInfo(.itemID).itemIcon, 16, 16, 0, 0, DI_NORMAL
End If
End If
Else ' 当鼠标移开菜单项时
' 画菜单项边框和背景(清除)
If BarStyle LBS_NONE Then
itemRect.Left = barRect.Right + 1
Else
itemRect.Left = 0
End If
hBrush = CreateSolidBrush(BkColor)
FillRect .hdc, itemRect, hBrush
DeleteObject hBrush
' 画菜单项文字
SetTextColor .hdc, TextEnabledColor
DrawText .hdc, MyItemInfo(.itemID).itemText, -1, textRect, DT_SINGLELINE Or DT_LEFT Or DT_VCENTER
' 画菜单项图标
If MyItemInfo(.itemID).itemType MIT_CHECKBOX Then
DrawIconEx .hdc, iconRect.Left + 2, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2, MyItemInfo(.itemID).itemIcon, 16, 16, 0, 0, DI_NORMAL
Else
If MyItemInfo(.itemID).itemState And MIS_CHECKED Then
DrawIconEx .hdc, iconRect.Left + 2, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2, MyItemInfo(.itemID).itemIcon, 16, 16, 0, 0, DI_NORMAL
End If
End If
End If
Else ' 当菜单项不可用时
' 画菜单项文字
SetTextColor .hdc, TextDisabledColor
DrawText .hdc, MyItemInfo(.itemID).itemText, -1, textRect, DT_SINGLELINE Or DT_LEFT Or DT_VCENTER
' 画菜单项图标
If MyItemInfo(.itemID).itemType MIT_CHECKBOX Then
DrawState .hdc, 0, 0, MyItemInfo(.itemID).itemIcon, 0, iconRect.Left + 2, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2, 0, 0, DST_ICON Or DSS_DISABLED
Else
If MyItemInfo(.itemID).itemState And MIS_CHECKED Then
DrawState .hdc, 0, 0, MyItemInfo(.itemID).itemIcon, 0, iconRect.Left + 2, iconRect.Top + (iconRect.Bottom - iconRect.Top + 1 - 16) / 2, 0, 0, DST_ICON Or DSS_DISABLED
End If
End If
End If
End If
End With
End If
End Sub
' 菜单项事件响应(单击菜单项)
Private Sub MenuItemSelected(ByVal itemID As Long)
Debug.Print "鼠标单击了：" & MyItemInfo(itemID).itemText
Select Case MyItemInfo(itemID).itemAlias
Case "exit"
Dim frm As Form
For Each frm In Forms
Unload frm
Next
End Select
End Sub
' 菜单项事件响应(选择菜单项)
Private Sub MenuItemSelecting(ByVal itemID As Long)
Debug.Print "鼠标移动到：" & MyItemInfo(itemID).itemText
End Sub