怎么实现Menu的CheckMenuItem?谢谢关注。

[票票飞扬]

//引用了ListViewEx，构造的一个视图

//引用Popup Menu菜单
void CTraceCCSView::OnContextMenu(CWnd* pWnd, CPoint point)
{
CMenu menu;
menu.LoadMenu (IDR_CCSMENU);
menu.GetSubMenu (0)->TrackPopupMenu (TPM_LEFTALIGN|TPM_RIGHTBUTTON,point.x,point.y,this,NULL);
}

//点击其中一个菜单项，要求改变MF_CHECKED和MF_UNCHECKED。
//以下程序不能实现，该怎么修改？
————————————————————————————
void CTraceCCSView::OnCcsmenuRegcc()
{
CMenu* mmenu = GetMenu(); //这步就有问题，下面根本就不能实现了
CMenu* submenu = mmenu->GetSubMenu(0);

UINT state = submenu->GetMenuState(ID_CCSMENU_REGCC, MF_BYCOMMAND);
ASSERT(state != 0xFFFFFFFF);
if (state & MF_CHECKED)
submenu->CheckMenuItem(ID_CCSMENU_REGCC, MF_UNCHECKED | MF_BYCOMMAND);
else
submenu->CheckMenuItem(ID_CCSMENU_REGCC, MF_CHECKED | MF_BYCOMMAND);
}

[omale]

OnUpdateUI不行么？

[oracle3]

使用菜单的消息UPDATE_COMMAND_UI
然后pCmdUI->SetCheck(变量)

[wuxuan]

#include "men3.h"

MainMenu MENU
BEGIN
POPUP "&Character"
BEGIN
MENUITEM "®ular", IDM_REGULAR, CHECKED
MENUITEM SEPARATOR
MENUITEM "&Bold", IDM_BOLD
MENUITEM "&Italic", IDM_ITALIC
MENUITEM "&Underline", IDM_ULINE
END
END

Here are the relevant contents of the application's header file.

// Menu-item identifiers

#define IDM_REGULAR 0x1
#define IDM_BOLD 0x2
#define IDM_ITALIC 0x4
#define IDM_ULINE 0x8

// Check-mark flags

#define CHECK 1
#define UNCHECK 2

// Font-attribute mask

#define ATTRIBMASK 0xe

// Function prototypes

LRESULT APIENTRY MainWndProc(HWND, UINT, WPARAM, LPARAM);
HBITMAP GetMyCheckBitmaps(UINT);
BYTE CheckOrUncheckMenuItem(BYTE, HMENU);
The following example shows the portions of the window procedure that create the check-mark bitmaps; set the check-mark attribute of the Bold, Italic, and Underline menu items; and destroy check-mark bitmaps.

LRESULT APIENTRY MainWndProc(HWND hwndMain, UINT uMsg, WPARAM wParam, LPARAM lParam)
{

static HBITMAP hbmpCheck; // handle to checked bitmap
static HBITMAP hbmpUncheck; // handle to unchecked bitmap
static HMENU hmenu; // handle to main menu
BYTE fbFontAttrib; // font-attribute flags

switch (uMsg)
{
case WM_CREATE:

// Call the application-defined GetMyCheckBitmaps
// function to get the predefined checked and
// unchecked check box bitmaps.

hbmpCheck = GetMyCheckBitmaps(CHECK);
hbmpUncheck = GetMyCheckBitmaps(UNCHECK);

// Set the checked and unchecked bitmaps for the menu
// items.

hmenu = GetMenu(hwndMain);
SetMenuItemBitmaps(hmenu, IDM_BOLD, MF_BYCOMMAND,
hbmpUncheck, hbmpCheck);
SetMenuItemBitmaps(hmenu, IDM_ITALIC, MF_BYCOMMAND,
hbmpUncheck, hbmpCheck);
SetMenuItemBitmaps(hmenu, IDM_ULINE, MF_BYCOMMAND,
hbmpUncheck, hbmpCheck);

return 0;

case WM_COMMAND:
switch (LOWORD(wParam))
{
// Process the menu commands.

case IDM_REGULAR:
case IDM_BOLD:
case IDM_ITALIC:
case IDM_ULINE:

// CheckOrUncheckMenuItem is an application-
// defined function that sets the menu item
// checkmarks and returns the user-selected
// font attributes.

fbFontAttrib = CheckOrUncheckMenuItem(
(BYTE) LOWORD(wParam), hmenu);

// Set the font attributes.

return 0;

// Process other command messages.

default:
break;
}

break;

// Process other window messages.

case WM_DESTROY:

// Destroy the checked and unchecked bitmaps.

DeleteObject(hbmpCheck);
DeleteObject(hbmpUncheck);

PostQuitMessage(0);
break;

default:
return DefWindowProc(hwndMain, uMsg, wParam, lParam);
}
return NULL;
}

[wuxuan]

HBITMAP GetMyCheckBitmaps(UINT fuCheck)
{
COLORREF crBackground; // background color
HBRUSH hbrBackground; // background brush
HBRUSH hbrTargetOld; // original background brush
HDC hdcSource; // source device context
HDC hdcTarget; // target device context
HBITMAP hbmpCheckboxes; // handle to check-box bitmap
BITMAP bmCheckbox; // structure for bitmap data
HBITMAP hbmpSourceOld; // handle to original source bitmap
HBITMAP hbmpTargetOld; // handle to original target bitmap
HBITMAP hbmpCheck; // handle to check-mark bitmap
RECT rc; // rectangle for check-box bitmap
WORD wBitmapX; // width of check-mark bitmap
WORD wBitmapY; // height of check-mark bitmap

// Get the menu background color and create a solid brush
// with that color.

crBackground = GetSysColor(COLOR_MENU);
hbrBackground = CreateSolidBrush(crBackground);

// Create memory device contexts for the source and
// destination bitmaps.

hdcSource = CreateCompatibleDC((HDC) NULL);
hdcTarget = CreateCompatibleDC(hdcSource);

// Get the size of the system default check-mark bitmap and
// create a compatible bitmap of the same size.

wBitmapX = GetSystemMetrics(SM_CXMENUCHECK);
wBitmapY = GetSystemMetrics(SM_CYMENUCHECK);

hbmpCheck = CreateCompatibleBitmap(hdcSource, wBitmapX,
wBitmapY);

// Select the background brush and bitmap into the target DC.

hbrTargetOld = SelectObject(hdcTarget, hbrBackground);
hbmpTargetOld = SelectObject(hdcTarget, hbmpCheck);

// Use the selected brush to initialize the background color
// of the bitmap in the target device context.

PatBlt(hdcTarget, 0, 0, wBitmapX, wBitmapY, PATCOPY);

// Load the predefined check box bitmaps and select it
// into the source DC.

hbmpCheckboxes = LoadBitmap((HINSTANCE) NULL,
(LPTSTR) OBM_CHECKBOXES);

hbmpSourceOld = SelectObject(hdcSource, hbmpCheckboxes);

// Fill a BITMAP structure with information about the
// check box bitmaps, and then find the upper-left corner of
// the unchecked check box or the checked check box.

GetObject(hbmpCheckboxes, sizeof(BITMAP), &bmCheckbox);

if (fuCheck == UNCHECK)
{
rc.left = 0;
rc.right = (bmCheckbox.bmWidth / 4);
}
else
{
rc.left = (bmCheckbox.bmWidth / 4);
rc.right = (bmCheckbox.bmWidth / 4) * 2;
}

rc.top = 0;
rc.bottom = (bmCheckbox.bmHeight / 3);

// Copy the appropriate bitmap into the target DC. If the
// check-box bitmap is larger than the default check-mark
// bitmap, use StretchBlt to make it fit; otherwise, just
// copy it.

if (((rc.right - rc.left) > (int) wBitmapX) ||
((rc.bottom - rc.top) > (int) wBitmapY))
{
StretchBlt(hdcTarget, 0, 0, wBitmapX, wBitmapY,
hdcSource, rc.left, rc.top, rc.right - rc.left,
rc.bottom - rc.top, SRCCOPY);
}

else
{
BitBlt(hdcTarget, 0, 0, rc.right - rc.left,
rc.bottom - rc.top,
hdcSource, rc.left, rc.top, SRCCOPY);
}

// Select the old source and destination bitmaps into the
// source and destination DCs, and then delete the DCs and
// the background brush.

SelectObject(hdcSource, hbmpSourceOld);
SelectObject(hdcTarget, hbrTargetOld);
hbmpCheck = SelectObject(hdcTarget, hbmpTargetOld);

DeleteObject(hbrBackground);
DeleteObject(hdcSource);
DeleteObject(hdcTarget);

// Return a handle to the new check-mark bitmap.

return hbmpCheck;
}


BYTE CheckOrUncheckMenuItem(BYTE bMenuItemID, HMENU hmenu)
{
DWORD fdwMenu;
static BYTE fbAttributes;

switch (bMenuItemID)
{
case IDM_REGULAR:

// Whenever the Regular menu item is selected, add a
// check mark to it and then remove checkmarks from
// any font-attribute menu items.

CheckMenuItem(hmenu, IDM_REGULAR, MF_BYCOMMAND |
MF_CHECKED);

if (fbAttributes & ATTRIBMASK)
{
CheckMenuItem(hmenu, IDM_BOLD, MF_BYCOMMAND |
MF_UNCHECKED);
CheckMenuItem(hmenu, IDM_ITALIC, MF_BYCOMMAND |
MF_UNCHECKED);
CheckMenuItem(hmenu, IDM_ULINE, MF_BYCOMMAND |
MF_UNCHECKED);
}
fbAttributes = IDM_REGULAR;
return fbAttributes;

case IDM_BOLD:
case IDM_ITALIC:
case IDM_ULINE:

// Toggle the check mark for the selected menu item and
// set the font attribute flags appropriately.

fdwMenu = GetMenuState(hmenu, (UINT) bMenuItemID,
MF_BYCOMMAND);
if (!(fdwMenu & MF_CHECKED))
{
CheckMenuItem(hmenu, (UINT) bMenuItemID,
MF_BYCOMMAND | MF_CHECKED);
fbAttributes |= bMenuItemID;
}
else
{
CheckMenuItem(hmenu, (UINT) bMenuItemID,
MF_BYCOMMAND | MF_UNCHECKED);
fbAttributes ^= bMenuItemID;
}

// If any font attributes are currently selected,
// remove the check mark from the Regular menu item;
// if no attributes are selected, add a check mark
// to the Regular menu item.

if (fbAttributes & ATTRIBMASK)
{
CheckMenuItem(hmenu, IDM_REGULAR,
MF_BYCOMMAND | MF_UNCHECKED);
fbAttributes &= (BYTE) ~IDM_REGULAR;
}
else
{
CheckMenuItem(hmenu, IDM_REGULAR,
MF_BYCOMMAND | MF_CHECKED);
fbAttributes = IDM_REGULAR;
}

return fbAttributes;
}
}

[票票飞扬]

Popup Menu 不响应 UPDATE_COMMAND_UI事件。

[foxmail]

把menu做成成员变量，并且把指针保存下来
下次就不需要GetMenu()了

[票票飞扬]

谢谢.
根据foxmail(萧遥) ( ) 的指点，果然成功了。
结帐了。