- 技术人生
- [Visual C++]VC++的菜单控制和自绘菜单【转载收藏】
菜单控制为什么即使调用EnableMenuItem菜单项后，菜单项还处于禁止状态 需要将CFrameWnd:: m_bAutomenuEnable设置为FALSE，如果该数据成员为TRUE（缺省值），工作框将自动地禁止没有ON_UPDATE_COMMAND_UI或者ON_COMMAND的菜单项。//Disable MFC from automatically disabling menu items.m_bAuoMenuEnable=FALSE;//Now enable the menu item.CMenu* pMenu=GetMenu ();ASSERT_VALID (pMenu);pMenu->EnableMenuItem (ID_MENU_ITEM,MF_BYCOMMAND | MF_ENABLED);如何给系统菜单添加一个菜单项 给系统菜单添加一个菜单项需要进行下述三个步骤：首先，使用Resource Symbols对话（在View菜单中选择Resource Symbols．．．可以显示该对话）定义菜单项ID，该ID应大于0x0F而小于0xF000；其次，调用CWnd::GetSystemMenu获取系统菜单的指针并调用CWnd:: Appendmenu将菜单项添加到菜单中。下例给系统菜单添加两个新的菜单项：int CMainFrame:: OnCreate (LPCREATESTRUCT lpCreateStruct){…//Make sure system menu item is in the right range.ASSERT (IDM_MYSYSITEM &0xFFF0)==IDM_MYSYSITEM);ASSERT (IDM-MYSYSITEM<0xF000);//Get pointer to system menu.CMenu* pSysmenu=GetSystemmenu (FALSE);ASSERT_VALID (pSysMenu);//Add a separator and our menu item to system menu.CString StrMenuItem (_T ("New menu item"));pSysMenu->Appendmenu (MF_SEPARATOR);pSysMenu->AppendMenu (MF_STRING, IDM_MYSYSITEM, strMenuitem);…}现在，选择系统菜单项时用户应进行检测。使用ClassWizard处理WM_SYSCOMMAND消息并检测用户菜单的nID参数：void CMainFrame:: OnSysCommand (UINT nID,LPARAM lParam){//Determine if our system menu item was selected.if ( (nID & 0xFFF0)==IDM_MYSYSITEM){//TODO-process system menu item}elseCMDIFrameWnd:: OnSysCommand (nID, lParam);}最后，一个设计良好的UI应用程序应当在系统菜单项加亮时在状态条显示一个帮助信息，这可以通过增加一个包含系统菜单基ID的串表的入口来实现。如何确定顶层菜单所占据的菜单行数 这可以通过简单的减法和除法来实现。首先，用户需要计算主框窗口的高度和客户区；其次，从主框窗口的高度中减去客户区、框边界以及标题的高度；最后，除以菜单栏的高度。下例成员函数是一个计算主框菜单所占据的行数的代码实现。int CMainFrame:: GetMenuRows (){CRect rcFrame,rcClient;GetWindowRect (rcFrame);GetClientRect (rcClient);return (rcFrame.Height () -rcClient.Height ()-:: GetSystemMetrics (SM_CYCAPTION) -(:: getSystemMetrics (SM_CYFRAME) *2)) /:: GetSystemMetrics (SM_CYMENU);}自绘菜单闻怡洋译 在这里提供一个C++类(CCustomMenu)，该类是CMenu的子类，并且拥有自绘能力。它可以向你提供以下的功能：设置字体颜色。设置高亮度颜色。设置高亮度时的风格。设置选中时和在普通状态下的菜单显示的图标。设置显示图标大小。在CCustomMenu中定义了结构MENUDATA，你必须根据你的需要填充该结构，并且在增加菜单时提供该结构的指针(调用AppendMenu,InsertMenu)。下面是一个例子：1、定义CCustomMenu的实例，和MENUDATA结构变量。 CCustomMenu m_cCustomMenu; MENUDATA menuData [8]; // as many menu items are present , You should be able to use //new and do the same2、调用CreateMenu()设置有关参数。 m_customMenu.CreateMenu (); m_customMenu.SetIconSize (25,25); //This is to set the size of the Icon. // This should be used only once for any menu // in order to resize it, destroy and create the menu again with different size. m_customMenu.SetHighlightStyle (Normal); //Or TextOnly, if you want the // background color to remain the same // and the Text color to change to the Highlight color. // The following setXXXColor sets the menu colors. If you dont want to change any, Dont call these member functions. m_customMenu.SetTextColor (RGB (255,0,0)); m_customMenu.SetBackColor (RGB (255,255,255)); m_customMenu.SetHighlightColor (RGB (0,0,255));3、设置MENUDATA变量，并增加菜单项。 lstrcpy (menuData[0].menuText , "text1"); menuData[0].menuIconNormal= IDI_ICON1; m_customMenu.AppendMenu (MF_OWNERDRAW,3,(LPCTSTR)menuData);3、在你的窗口中重载OnMeasureItem(...)函数。void CMyView::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct){ if ( lpMeasureItemStruct->CtlType == ODT_MENU && IsMenu((HMENU)lpMeasureItemStruct->itemID) && (lpMeasureItemStruct->itemID == (UINT)m_hMenuSub) ) { m_customMenu.MeasureItem (lpMeasureItemStruct); } else // let MFC's self-drawing handle it CView::OnMeasureItem(nIDCtl, lpMeasureItemStruct);}下面的函数将帮助你设置菜单属性。 void SetTextColor (COLORREF ); void SetBackColor (COLORREF); void SetHighlightColor (COLORREF); void SetIconSize (int, int); void SetHighlightStyle (HIGHLIGHTSTYLE ); // HIGHLIGHTSTYLE : enum {Normal, TextOnly} void SetHighlightTextColor (COLORREF);下面是文件代码：//*************************************************************************// CustomMenu.h : header file//#if!defined(AFX_CUSTOMMENU_H__FE5B01C3_1E02_11D1_B87A_0060979CDF6D__INCLUDED_)#define AFX_CUSTOMMENU_H__FE5B01C3_1E02_11D1_B87A_0060979CDF6D__INCLUDED_#if _MSC_VER >= 1000#pragma once#endif // _MSC_VER >= 1000class MENUDATA{public: MENUDATA () { menuIconNormal = -1; menuIconSelected = -1;}; char menuText[32]; UINT menuIconNormal; UINT menuIconSelected;};typedef enum {Normal,TextOnly} HIGHLIGHTSTYLE;//// CCustomMenu windowclass CCustomMenu : public CMenu{// Constructionpublic: CCustomMenu();// Attributespublic:// Operationspublic:// Overrides // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CCustomMenu) //}}AFX_VIRTUAL// Implementationpublic: virtual ~CCustomMenu(); virtual void DrawItem( LPDRAWITEMSTRUCT); virtual void MeasureItem( LPMEASUREITEMSTRUCT ); void SetTextColor (COLORREF ); void SetBackColor (COLORREF); void SetHighlightColor (COLORREF); void SetIconSize (int, int); void SetHighlightStyle (HIGHLIGHTSTYLE ); void SetHighlightTextColor (COLORREF); // Generated message map functionsprotected: COLORREF m_crText; COLORREF m_clrBack; COLORREF m_clrText; COLORREF m_clrHilight; COLORREF m_clrHilightText; LOGFONT m_lf; CFont m_fontMenu; UINT m_iMenuHeight; BOOL m_bLBtnDown; CBrush m_brBackground,m_brSelect; CPen m_penBack; int m_iconX,m_iconY; HIGHLIGHTSTYLE m_hilightStyle; //{{AFX_MSG(CCustomMenu) // NOTE - the ClassWizard will add and remove member functions here. //}}AFX_MSG};///////{{AFX_INSERT_LOCATION}}// Microsoft Developer Studio will insert additional declarations immediately before the previous line.#endif //!defined(AFX_CUSTOMMENU_H__FE5B01C3_1E02_11D1_B87A_0060979CDF6D__INCLUDED_)//*************************************************************************// CustomMenu.cpp : implementation file//#include "stdafx.h"#include "CustomMenu.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif//// CCustomMenuCCustomMenu::CCustomMenu(){ m_clrText = GetSysColor (COLOR_MENUTEXT); m_clrBack = GetSysColor (COLOR_MENU); m_brBackground.CreateSolidBrush (m_clrBack); m_penBack.CreatePen (PS_SOLID,0,m_clrBack); m_crText = m_clrText; m_bLBtnDown = FALSE; m_iconX = GetSystemMetrics ( SM_CXMENUCHECK); m_iconY = GetSystemMetrics (SM_CYMENUCHECK ); m_clrHilight = GetSysColor (COLOR_HIGHLIGHT); m_brSelect.CreateSolidBrush (m_clrHilight); m_clrHilightText = GetSysColor (COLOR_HIGHLIGHTTEXT); ZeroMemory ((PVOID) &m_lf,sizeof (LOGFONT)); NONCLIENTMETRICS nm; nm.cbSize = sizeof (NONCLIENTMETRICS); //Get the system metrics for the Captionfromhere VERIFY (SystemParametersInfo (SPI_GETNONCLIENTMETRICS,0,&nm,0)); m_lf = nm.lfMenuFont; m_iMenuHeight = nm.iMenuHeight; m_fontMenu.CreateFontIndirect (&m_lf);}CCustomMenu::~CCustomMenu(){ if ((HBRUSH) m_brBackground != NULL) m_brBackground.DeleteObject (); if ((HFONT)m_fontMenu !=NULL) m_fontMenu.DeleteObject (); if ((HBRUSH)m_brSelect != NULL) m_brSelect.DeleteObject ();}//// CCustomMenu message handlersvoid CCustomMenu::DrawItem (LPDRAWITEMSTRUCT lpDIS){ ASSERT(lpDIS != NULL); CDC* pDC = CDC::FromHandle(lpDIS->hDC); CRect rect; HICON hIcon; COLORREF crText = m_crText; // draw the colored rectangle portion rect.CopyRect(&lpDIS->rcItem); // draw the up/down/focused/disabled state UINT action = lpDIS->itemAction; UINT state = lpDIS->itemState; CString strText; LOGFONT lf; lf = m_lf; CFont dispFont; CFont *pFont; //GetWindowText(strText); if (lpDIS->itemData != NULL) { strText = (((MENUDATA*) (lpDIS->itemData))->menuText); if ((((MENUDATA *)(lpDIS->itemData))->menuIconNormal) == -1) hIcon = NULL; else if (state & ODS_SELECTED) { if ((((MENUDATA *)(lpDIS->itemData))->menuIconSelected) != -1) hIcon = AfxGetApp ()->LoadIcon (((MENUDATA *)(lpDIS->itemData))->menuIconSelected); else hIcon = AfxGetApp()->LoadIcon (((MENUDATA*)(lpDIS->itemData))->menuIconNormal); } else hIcon = AfxGetApp()->LoadIcon (((MENUDATA*)(lpDIS->itemData))->menuIconNormal); TRACE1 ("Draw for %s/n", strText); } else { strText.Empty(); hIcon = NULL; } if ( (state & ODS_SELECTED) ) { // draw the down edges CPen *pOldPen = pDC->SelectObject (&m_penBack); //You need only Text highlight and thats what you get if (m_hilightStyle != Normal) { pDC->FillRect (rect,&m_brBackground); } else { pDC->FillRect (rect,&m_brSelect); } pDC->SelectObject (pOldPen); pDC->Draw3dRect (rect,GetSysColor (COLOR_3DHILIGHT),GetSysColor(COLOR_3DSHADOW)); lf.lfWeight = FW_BOLD; if ((HFONT)dispFont != NULL) dispFont.DeleteObject (); dispFont.CreateFontIndirect (&lf); crText = m_clrHilightText; //While selected move the text a bit TRACE0 ("SELECT,SELECTED/n"); } else { CPen *pOldPen = pDC->SelectObject (&m_penBack); pDC->FillRect (rect,&m_brBackground); pDC->SelectObject (pOldPen); // draw the up edges pDC->Draw3dRect (rect,m_clrBack,m_clrBack); if ((HFONT)dispFont != NULL) dispFont.DeleteObject (); dispFont.CreateFontIndirect (&lf); //Normal TRACE0 ("SELECT, NORMAL/n"); } // draw the text if there is any //We have to paint the text only if the image is nonexistant if (hIcon != NULL) { if(DrawIconEx (pDC->GetSafeHdc(),rect.left,rect.top,hIcon, (m_iconX)?m_iconX:32,(m_iconY)?m_iconY:32,0,NULL,DI_NORMAL)) TRACE0("Wrote the icon successfully/n"); else TRACE0 ("SORRY.NOGO/n"); } //This is needed always so that we can have the space for check marks rect.left = rect.left +((m_iconX)?m_iconX:32); if ( !strText.IsEmpty()) { // pFont->GetLogFont (&lf); int iOldMode = pDC->GetBkMode(); pDC->SetBkMode( TRANSPARENT); pDC->SetTextColor( crText); pFont = pDC->SelectObject (&dispFont); TRACE1( "About To DrawText %s/n",strText); pDC->DrawText (strText,rect,DT_LEFT|DT_SINGLELINE|DT_VCENTER); TRACE0("Done/n"); pDC->SetBkMode( iOldMode ); pDC->SelectObject (pFont); //set it to the old font } dispFont.DeleteObject ();}void CCustomMenu::MeasureItem( LPMEASUREITEMSTRUCT lpMIS ){ CDC *pDC = AfxGetApp()->m_pMainWnd->GetDC(); CFont* pFont = pDC->SelectObject (&m_fontMenu); int iconX = 0,iconY= 0; TEXTMETRIC tm; pDC->GetTextMetrics (&tm); pDC->SelectObject (pFont); AfxGetApp()->m_pMainWnd->ReleaseDC (pDC); if (m_iconX) iconX = m_iconX; if (m_iconY) iconY = m_iconY; lpMIS->itemWidth = iconX + tm.tmAveCharWidth * lstrlen(((MENUDATA*)(lpMIS->itemData))->menuText) +10; lpMIS->itemHeight = (iconY > (m_iMenuHeight+1))?iconY:m_iMenuHeight + 1;}void CCustomMenu::SetIconSize (int width, int height){ m_iconX = width; m_iconY = height;}void CCustomMenu::SetTextColor (COLORREF clrText){ m_crText = clrText;}void CCustomMenu::SetBackColor (COLORREF clrBack){ m_clrBack = clrBack; if ((HBRUSH)m_brBackground != NULL) m_brBackground.DeleteObject (); m_brBackground.CreateSolidBrush (clrBack);}void CCustomMenu::SetHighlightColor (COLORREF clrHilight){ m_clrHilight = clrHilight; if ((HBRUSH)m_brSelect != NULL) m_brSelect.DeleteObject (); m_brSelect.CreateSolidBrush (clrHilight);}void CCustomMenu::SetHighlightTextColor (COLORREF clrHilightText){ m_clrHilightText = clrHilightText;}void CCustomMenu::SetHighlightStyle (HIGHLIGHTSTYLE hilightStyle){ m_hilightStyle = hilightStyle;}
