众所周知，MS Office 2003推出已经有一段时间了，但我们依然不会忘记Office XP刚刚推出时其令人耳目一新的菜单给我们留下的深刻印象。突起的悬浮式图标，不同寻常的菜单项填充方式，不仅让办公一族们赞不绝口，更让广大的程序员和编程爱好者对这种风格的菜单的制作产生了浓厚的兴趣。所以，在这篇文章里，我们就来好好地研究研究用VB怎么制作这种风格的菜单，在文章的最后，我将给出源代码的下载地址。事实上，在了解其原理以后，不论是用VB、VC还是Delphi，都能够制作出XP风格的菜单。不仅如此，我们还可以制作出更加充满个性的另类风格的菜单，比如3D立体风格、渐变风格、多彩风格等等。只有想不到的，没有做不到的。Follow me！
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 |
frmMain |
| Caption |
菜单例子 |
| Frame |
Name |
fraStyle |
| Caption |
菜单风格 |
| Label |
Name |
lblHelp |
| Caption |
在窗体空白处单击鼠标右键 |
| OptionButton |
Name |
opnStyle |
| Caption |
Window 标准 |
| Index |
0 |
| OptionButton |
Name |
opnStyle |
| Caption |
XP 风格 |
| Index |
1 |
| OptionButton |
Name |
opnStyle |
| Caption |
3D 立体风格 |
| Index |
2 |
| OptionButton |
Name |
opnStyle |
| Caption |
渐变风格 |
| Index |
3 |
| OptionButton |
Name |
opnStyle |
| Caption |
多彩风格 |
| Index |
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
|
代码中创建了一个cMenu类的对象，我们的编程重点将会放在cMenu类上，上面的代码只是简单地调用cMenu。在后面的文章中，我们会看到其实cMenu有多达30个方法和属性供我们调用，它的Style属性只提供了5种内置风格，在实际应用中，我们可以利用cMenu类提供的方法和属性制作出各种各样风格的菜单，为自己的程序锦上添花。
（4）运行结果：
图1
图2
图3
图4
图5
下面我们来创建接收消息的窗体：打开上面建好的工程，添加一个窗体，并将其名称设置为frmMenu（注意：这一步是必须的）。图5菜单左边那个黑底色的附加条，为了方便，将frmMenu的Picture属性设置成图5。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面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。
' 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
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到此为止，我们就完成了菜单类的编写，且还包括一个测试窗体。现在，完整的工程里应该包括两个窗体：frmMain和frmMenu；一个标准模块：mMenu；一个类模块：cMenu。按F5编译运行一下，在窗体空白处单击鼠标右键。怎么样，出现弹出式菜单了吗？换个风格再试试。
看完这篇文章后，我想你应该已经对采用物主绘图技术的自绘菜单有了一定的了解，再看看MS Office 2003的菜单，其实也没什么难的嘛。
本文程序在Windows XP、VB6下调试通过。
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