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vb打造超酷个性化菜单（三）
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
ok，到此为止，我们就彻底完成了菜单类的编写，而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。
在看完这个系列的文章后，我想你应该已经对采用物主绘图技术的自绘菜单有一定的了解了，回过头来再看看ms office 2003的菜单，其实也没什么难的嘛。以后，我们就可以在自己的任何程序中调用这个写好的菜单类，为自己的程序添光加彩了。 🙂
该程序在windows xp、vb6下调试通过。
源代码下载地址：http://y365.com/ses518/soft/samplecsdn.zip
