让Toolbar显示大小不同的ICONs

It's said in MSDN that:“ Microsoft Windows assumes that all of a toolbar's bitmapped images are the same size. ” So the question is : How can we implement a toolbar with different sized images, which is just like as Google Toolbar?


There are two ways:

1.To use double ImageLists

You should note that the image's size of the toolbar is decided by the first ImageList, even though the second one is different from the first one. So after registering double ImageLists, you also have to reset the button's size to suit the second imagelist.
This is the code segment:

a. setting double imagelist

     // 1st ImageList, with normal images
    m_hImage1st  =  ImageList_Create( 16 ,  16 , ILC_COLOR24,  1 ,  0 );
     int  nIdx11  =  ImageList_Add(m_hImageFirst,,NULL);
     int  nIdx12  =   ImageList_Add(m_hImageFirst,,NULL);

         // 2nd ImageList, with bigger image
    m_hImage2nd  =  ImageList_Create( 48 ,  16 , ILC_COLOR24,  2 ,  0 );
     int  nIdx21  = ImageList_Add(m_hImage2nd ,,NULL);

     //  add imagelists, the order is very important
    ::SendMessage(m_hWnd, CCM_SETVERSION, (WPARAM)  5 ,  0 );
    ::SendMessage(m_hWnd, TB_SETIMAGELIST,  0 , (LPARAM)m_hImage1st);
    ::SendMessage(m_hWnd, TB_SETIMAGELIST,  1 , (LPARAM)m_hImage2nd);

     //  set button image
    pTBBtn[ 0 ].iBitmap  =  MAKELONG(nIdx21,  1 );
    pTBBtn[ 1 ].iBitmap  =  MAKELONG(nIdx11,  0 );
    pTBBtn[ 2 ].iBitmap  =  MAKELONG(nIdx12,  0 );

b. resize the button with bigger image

    TBBUTTONINFO tbi;            
    tbi.cbSize  =   sizeof (TBBUTTONINFO);
    tbi.dwMask  =  TBIF_STYLE  |  TBIF_SIZE;
    tbi.fsStyle  =  pTBBtn[ 0 ].fsStyle;
    tbi.cx  =   48 ;
        ::SendMessage(m_hWnd, TB_SETBUTTONINFO, nID, (LPARAM) & tbi);

And now,  the first button of the toolbar has different sized image from others.

2. To use Rebar control

A rebar control may have many toolbars, so you can create two toolbars with different sized imagelist.(See MSDN.). But we can only create one toolbar in WTL by default, so it's a little complex to implement using WTL in this method. You can try this in MFC.