多媒体编程

开发平台：
Visual C++

DLG_Find.c：源码内容
							
////////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "globals.h"
#include "DLG_Find.h"
#include "CPI_Playlist.h"
#include "CPI_PlaylistItem.h"
////////////////////////////////////////////////////////////////////////////////
//
void Search_SelectItems();
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//
//
//
BOOL CALLBACK wp_FindDialog(HWND hWnd, UINT uMessage, WPARAM wParam, LPARAM lParam)
{
    switch(uMessage)
    {
    case WM_INITDIALOG:
        // Setup type initial state
        {
            UINT uiDlgItemToSet;
            if(options.m_enQuickFindTerm == qftTitle)
                uiDlgItemToSet = IDC_QFND_TITLES;
            else if(options.m_enQuickFindTerm == qftArtist)
                uiDlgItemToSet = IDC_QFND_ARTISTS;
            else
                uiDlgItemToSet = IDC_QFND_ALBUMS;
            SendDlgItemMessage(hWnd, uiDlgItemToSet, BM_SETCHECK, (WPARAM)BST_CHECKED, 0L);
        }
        // Setup position
        if(globals.m_bQuickFindWindowPos_Valid == TRUE)
        {
            SetWindowPos(hWnd, NULL,
                         globals.m_ptQuickFindWindowPos.x, globals.m_ptQuickFindWindowPos.y,
                         0, 0,
                         SWP_NOSIZE | SWP_NOZORDER);
        }
        return TRUE;
    case WM_CLOSE:
        DestroyWindow(hWnd);
        windows.m_hWndFindDialog = NULL;
        SetFocus(CLV_GetHWND(globals.m_hPlaylistViewControl));
        break;
    case WM_COMMAND:
        switch(LOWORD(wParam))
        {
        case IDOK:
        case IDCANCEL:
            SendMessage(hWnd, WM_CLOSE, 0L, 0L);
            break;
        case IDC_FND_TEXT:
            if(HIWORD(wParam) == EN_CHANGE)
                Search_SelectItems();
            break;
        case IDC_QFND_TITLES:
        case IDC_QFND_ARTISTS:
        case IDC_QFND_ALBUMS:
            if(HIWORD(wParam) == BN_CLICKED)
            {
                // Set the search defaults
                if(LOWORD(wParam) == IDC_QFND_TITLES)
                    options.m_enQuickFindTerm = qftTitle;
                else if(LOWORD(wParam) == IDC_QFND_ARTISTS)
                    options.m_enQuickFindTerm = qftArtist;
                else
                    options.m_enQuickFindTerm = qftAlbum;
                // Research
                Search_SelectItems();
            }
            break;
        }
        break;
    case WM_WINDOWPOSCHANGED:
        // Store the window pos for next time
        {
            const WINDOWPOS* pWinPos = (const WINDOWPOS*)lParam;
            globals.m_bQuickFindWindowPos_Valid = TRUE;
            globals.m_ptQuickFindWindowPos.x = pWinPos->x;
            globals.m_ptQuickFindWindowPos.y = pWinPos->y;
        }
        break;
    }
    return FALSE;
}
//
//
//
char* CP_stristr(const char *pcString1, const char *pcString2)
{
    char *pCompareStart = (char *)pcString1;
    char *pCursor_S1, *pCursor_S2;
    char cSrc, cDst;
    // If there is a null source string - this is a "no match"
    if(!pcString1)
        return NULL;
    // Null length string 2 - this is a "no match"
    if(!*pcString2)
        return NULL;
    // Search from every start pos in the source string
    while(*pCompareStart)
    {
        pCursor_S1 = pCompareStart;
        pCursor_S2 = (char *)pcString2;
        // Scan both string
        while(*pCursor_S1 && *pCursor_S2)
        {
            cSrc = *pCursor_S1;
            cDst = *pCursor_S2;
            // Correct case
            if( (cSrc >= 'A') && (cSrc <= 'Z') )
                cSrc -= ('A' - 'a');
            if( (cDst >= 'A') && (cDst <= 'Z') )
                cDst -= ('A' - 'a');
            if(cSrc != cDst)
                break;
            pCursor_S1++;
            pCursor_S2++;
        }
        // If string 2 is exhausted - there is a match
        if(!*pCursor_S2)
            return(pCompareStart);
        // Offset source and continue
        pCompareStart++;
    }
    return NULL;
}
//
//
//
void Search_SelectItems()
{
    CP_HPLAYLISTITEM hCursor;
    BOOL bFirstMatch = TRUE;
    char* pcTerm;
    unsigned int iEditTextLength;
    BOOL bTitles, bAlbums, bArtists;
    // Get search term
    iEditTextLength = SendDlgItemMessage(windows.m_hWndFindDialog, IDC_FND_TEXT, WM_GETTEXTLENGTH, 0L, 0L);
    pcTerm = (char*)malloc(iEditTextLength + 1);
    SendDlgItemMessage(windows.m_hWndFindDialog, IDC_FND_TEXT, WM_GETTEXT, (WPARAM)(iEditTextLength + 1), (LPARAM)pcTerm);
    // Get search filter
    bTitles = SendDlgItemMessage(windows.m_hWndFindDialog, IDC_QFND_TITLES, BM_GETCHECK, 0L, 0L) == BST_CHECKED ? TRUE : FALSE;
    bArtists = SendDlgItemMessage(windows.m_hWndFindDialog, IDC_QFND_ARTISTS, BM_GETCHECK, 0L, 0L) == BST_CHECKED ? TRUE : FALSE;
    bAlbums = SendDlgItemMessage(windows.m_hWndFindDialog, IDC_QFND_ALBUMS, BM_GETCHECK, 0L, 0L) == BST_CHECKED ? TRUE : FALSE;
    // Perform select/search
    for(hCursor = CPL_GetFirstItem(globals.m_hPlaylist); hCursor; hCursor = CPLI_Next(hCursor))
    {
        const int iItemIDX = CPLI_GetCookie(hCursor);
        const char* pcMatchTerm;
        BOOL bSelect = FALSE;
        // Perform searches
        if(bTitles)
            pcMatchTerm = CPLI_GetTrackName(hCursor);
        else if(bArtists)
            pcMatchTerm = CPLI_GetArtist(hCursor);
        else
            pcMatchTerm = CPLI_GetAlbum(hCursor);
        if( CP_stristr(pcMatchTerm, pcTerm) )
            bSelect = TRUE;
        // If this is the first match - focus (and scroll on) the item
        if(bSelect && bFirstMatch == TRUE)
        {
            bFirstMatch = FALSE;
            CLV_SetFocusItem(globals.m_hPlaylistViewControl, iItemIDX);
            CLV_EnsureVisible(globals.m_hPlaylistViewControl, iItemIDX);
        }
        // Update selected state
        CLV_SetItemSelected(globals.m_hPlaylistViewControl, iItemIDX, bSelect);
    }
    // Cleanup
    free(pcTerm);
}
//
//
//

						