MyMenu.cpp

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#include <windows.h>

#include "MyString.h"
#include "MyMenu.h"

CMyMenu::CMyMenu()
{
        m_hFont = CreatePopupMenuTitleFont();
        clLeft=GetSysColor(COLOR_ACTIVECAPTION);
        clRight=GetSysColor(27);  //COLOR_GRADIENTACTIVECAPTION
        clText=GetSysColor(COLOR_CAPTIONTEXT);
        
        hinst_msimg32 = LoadLibrary( "msimg32.dll" );
        m_bCanDoGradientFill = FALSE;
        
        if(hinst_msimg32)
        {
                m_bCanDoGradientFill = TRUE;            
                dllfunc_GradientFill = ((LPFNDLLFUNC1) GetProcAddress( hinst_msimg32, "GradientFill" ));
        }
        bDrawEdge=false;
        flag_edge=BDR_SUNKENINNER;
}

CMyMenu::~CMyMenu()
{
        DeleteObject(m_hFont);
        FreeLibrary( hinst_msimg32 );
}

// CTitleMenu message handlers


HFONT CMyMenu::CreatePopupMenuTitleFont()
{
        // start by getting the stock menu font
        HFONT hfont = (HFONT)GetStockObject(ANSI_VAR_FONT);
        if (hfont) 
        { 
            LOGFONT lf; //get the complete LOGFONT describing this font
            if (GetObject(hfont, sizeof(LOGFONT), &lf)) 
                {
                        lf.lfWeight = FW_BOLD;  // set the weight to bold
                        // recreate this font with just the weight changed
                        return CreateFontIndirect(&lf);
                }
        }
        return NULL;
}


//
// This function adds a title entry to a popup menu
//
void CMyMenu::AddTitle(char *title)
{
        // insert an empty owner-draw item at top to serve as the title
        // note: item is not selectable (disabled) but not grayed
        m_title=title;
        InsertMenu(m_hMenu,0, MF_BYPOSITION | MF_OWNERDRAW | MF_STRING | MF_DISABLED, 0,NULL);
}



void CMyMenu::MeasureItem(LPMEASUREITEMSTRUCT mi)
{
        // get the screen dc to use for retrieving size information
        HDC dc= GetDC(NULL);
        // select the title font
        HFONT hfontOld = (HFONT)SelectObject(dc,m_hFont);
        // compute the size of the title
        SIZE size;
        GetTextExtentPoint32(dc,m_title,m_title.GetSize(),&size);
        // deselect the title font
        SelectObject(dc, hfontOld);
        // add in the left margin for the menu item
        size.cx += GetSystemMetrics(SM_CXMENUCHECK)+8;


        //Return the width and height
        //+ include space for border
        const int nBorderSize = 2;
        mi->itemWidth = size.cx + nBorderSize;
        mi->itemHeight = size.cy + nBorderSize;
}


void CMyMenu::DrawItem(LPDRAWITEMSTRUCT di)
{
        COLORREF crOldBk = SetBkColor(di->hDC, clLeft);
        
        if(m_bCanDoGradientFill&&(clLeft!=clRight))
        {
                TRIVERTEX rcVertex[2];
                di->rcItem.right--; // exclude this point, like FillRect does 
                di->rcItem.bottom--;
                rcVertex[0].x=di->rcItem.left;
                rcVertex[0].y=di->rcItem.top;
                rcVertex[0].Red=GetRValue(clLeft)<<8;   // color values from 0x0000 to 0xff00 !!!!
                rcVertex[0].Green=GetGValue(clLeft)<<8;
                rcVertex[0].Blue=GetBValue(clLeft)<<8;
                rcVertex[0].Alpha=0x0000;
                rcVertex[1].x=di->rcItem.right; 
                rcVertex[1].y=di->rcItem.bottom;
                rcVertex[1].Red=GetRValue(clRight)<<8;
                rcVertex[1].Green=GetGValue(clRight)<<8;
                rcVertex[1].Blue=GetBValue(clRight)<<8;
                rcVertex[1].Alpha=0;
                GRADIENT_RECT rect;
                rect.UpperLeft=0;
                rect.LowerRight=1;
                
                // fill the area 
                GradientFill( di->hDC,rcVertex,2,&rect,1,GRADIENT_FILL_RECT_H);
        }
        else ExtTextOut(di->hDC, 0, 0, ETO_OPAQUE, &di->rcItem, NULL, 0, NULL);
        if(bDrawEdge) DrawEdge(di->hDC, &di->rcItem, flag_edge, BF_RECT);
 

        int modeOld = ::SetBkMode(di->hDC, TRANSPARENT);
        COLORREF crOld = ::SetTextColor(di->hDC, clText);
        // select font into the dc
        HFONT hfontOld = (HFONT)SelectObject(di->hDC, m_hFont);

        // add the menu margin offset
        di->rcItem.left += GetSystemMetrics(SM_CXMENUCHECK)+8;

        // draw the text left aligned and vertically centered
        DrawText(di->hDC, m_title, -1, &di->rcItem, DT_SINGLELINE|DT_VCENTER|DT_LEFT);

        //Restore font and colors...
        SelectObject(di->hDC, hfontOld);
        ::SetBkMode(di->hDC, modeOld);
        ::SetBkColor(di->hDC, crOldBk);
        ::SetTextColor(di->hDC, crOld);
}


BOOL CMyMenu::GradientFill(HDC hdc, CONST PTRIVERTEX pVertex, DWORD dwNumVertex, PVOID pMesh, DWORD dwNumMesh, DWORD dwMode)
{
        return dllfunc_GradientFill(hdc,pVertex,dwNumVertex,pMesh,dwNumMesh,dwMode); 
}

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