dialogs.c

<Win2k系统编程>源码.次数为国人自编,内容丰富,还是不错的.

*   The value that the dialog proc should return, based on the processing
*   of the specific WM_COMMAND message received.
\*****************************************************************************/

BOOL CALLBACK
MessagesDlgProc(
    HWND hwnd,
    UINT msg,
    WPARAM wParam,
    LPARAM lParam
    )
{
    switch (msg)
    {
        case WM_INITDIALOG:
            MessagesInit(hwnd);
            return TRUE;

        case WM_COMMAND:
            return MessagesCommand(hwnd, LOWORD(wParam), HIWORD(wParam));
    }

    return FALSE;
}



/*****************************************************************************\
* MessagesInit
*
* Initializes the messages dialog.
*
* Arguments:
*   HWND hwnd - Dialog window handle.
*
* Returns:
*   VOID
\*****************************************************************************/

PRIVATE VOID
MessagesInit(
    HWND hwnd
    )
{
    HWND hwndList;
    INT i;
    INT j;
    INT iSel;
    PMSGDESC pmd;

    for (j = 0; j < gcMsgGroups; j++)
        gaMsgGroup[j].cUseCount = 0;

    hwndList = GetDlgItem(hwnd, DID_MSGSLIST);

    for (i = 0, pmd = gaMsgs; i < gcMessages; i++, pmd++)
    {
        iSel = (INT)SendMessage(hwndList, LB_ADDSTRING, 0, (LPARAM)pmd->pszMsg);
        SendMessage(hwndList, LB_SETITEMDATA, iSel, (LPARAM)pmd);

        if (pmd->Flags & MTF_SELECTED)
        {
            SendMessage(hwndList, LB_SETSEL, TRUE, iSel);

            for (j = 0; j < gcMsgGroups; j++)
            {
                if (gaMsgGroup[j].flMask & pmd->Flags)
                    gaMsgGroup[j].cUseCount++;
            }
        }
    }

    //
    // Set the selection rectangle to the first item in the listbox.
    //
    SendMessage(hwndList, LB_SETCARETINDEX, 0, FALSE);

    //
    // Loop through all the message groups.
    //
    for (j = 0; j < gcMsgGroups; j++)
    {
        //
        // Is at least one message in the group selected?
        //
        if (gaMsgGroup[j].cUseCount)
        {
            //
            // Check the corresponding checkbox.  If all messages
            // in the group are selected, the checkbox is checked.
            // If only some are selected, the checkbox is set to
            // grayed (3-state).
            //
            CheckDlgButton(hwnd, gaMsgGroup[j].idCheckBox,
                (gaMsgGroup[j].cUseCount == gaMsgGroup[j].cMsgs) ? 1 : 2);
        }
    }

    if (gfMsgsUser)
        CheckDlgButton(hwnd, DID_MSGSUSER, 1);

    if (gfMsgsUnknown)
        CheckDlgButton(hwnd, DID_MSGSUNKNOWN, 1);

    gcItemsSave = SendMessage(hwndList, LB_GETSELITEMS,
        gcMessages, (LPARAM)gaiSelected);
}



/*****************************************************************************\
* MessagesCommand
*
* Handles the WM_COMMAND messages for the Messages dialog.
*
* Arguments:
*   HWND hwnd       - Window handle of the dialog.
*   INT nCmd        - Command value.
*   INT nNotifyCode - The notify code.
*
* Returns:
*   The value that the dialog proc should return, based on the processing
*   of the specific WM_COMMAND message received.
*
\*****************************************************************************/

PRIVATE BOOL
MessagesCommand(
    HWND hwnd,
    INT nCmd,
    INT nNotifyCode
    )
{
    INT i;
    INT j;
    PMSGGROUP pmg;
    PMSGDESC pmd;
    BOOL fChecked;
    HWND hwndList;
    INT cItems;
    BOOL fSel;
    INT iSel;
    INT cSelItemsMax;
    INT iTopIndex;

    switch (nCmd)
    {
        case DID_MSGSLIST:
            if (nNotifyCode == LBN_SELCHANGE)
            {
                hwndList = GetDlgItem(hwnd, DID_MSGSLIST);
                cItems = SendMessage(hwndList, LB_GETSELITEMS,
                    gcMessages, (LPARAM)gaiSelected2);
                if (cItems == gcItemsSave)
                {
                    //
                    // Nothing changed except for the selection
                    // rectangle moving.  We are done.
                    //
                    break;
                }

                if (cItems > gcItemsSave)
                {
                    //
                    // A message was selected.  Look for it.
                    //
                    for (i = 0; i < gcItemsSave &&
                        gaiSelected[i] == gaiSelected2[i]; i++)
                        ;

                    iSel = gaiSelected2[i];
                    fSel = TRUE;
                }
                else
                {
                    //
                    // A message was unselected.  Look for it.
                    //
                    for (i = 0; i < cItems &&
                        gaiSelected[i] == gaiSelected2[i]; i++)
                        ;

                    iSel = gaiSelected[i];
                    fSel = FALSE;
                }

                //
                // Get the currently selected item.  It was either
                // just turned on or off.
                //
                pmd = (PMSGDESC)SendMessage(hwndList, LB_GETITEMDATA, iSel, 0);

                //
                // Loop through the message groups and update the use
                // counts for all groups that contain this message.
                //
                for (i = 0; i < gcMsgGroups; i++)
                {
                    if (pmd->Flags & gaMsgGroup[i].flMask)
                    {
                        gaMsgGroup[i].cUseCount += fSel ? 1 : -1;
                    }
                }

                //
                // Be sure that the checkboxes reflect the updated
                // status of the message group use counts.
                //
                MessagesUpdateCheckBoxes(hwnd);

                //
                // Save away the new selected item array.
                //
                cSelItemsMax = max(cItems, gcItemsSave);
                for (i = 0; i < cSelItemsMax; i++)
                {
                    gaiSelected[i] = gaiSelected2[i];
                }

                gcItemsSave = cItems;
            }

            break;

        case DID_MSGSALL:
            hwndList = GetDlgItem(hwnd, DID_MSGSLIST);
            SendMessage(hwndList, LB_SETSEL, TRUE, (LPARAM)-1);

            for (i = 0; i < gcMsgGroups; i++)
            {
                gaMsgGroup[i].cUseCount = gaMsgGroup[i].cMsgs;
                CheckDlgButton(hwnd, gaMsgGroup[i].idCheckBox, 1);
            }

            gcItemsSave = SendMessage(hwndList, LB_GETSELITEMS, gcMessages,
                (LPARAM)gaiSelected);

            CheckDlgButton(hwnd, DID_MSGSUSER, 1);
            CheckDlgButton(hwnd, DID_MSGSUNKNOWN, 1);

            break;

        case DID_MSGSNONE:
            hwndList = GetDlgItem(hwnd, DID_MSGSLIST);
            SendMessage(hwndList, LB_SETSEL, FALSE, (LPARAM)-1);

            for (i = 0; i < gcMsgGroups; i++)
            {
                gaMsgGroup[i].cUseCount = 0;
                CheckDlgButton(hwnd, gaMsgGroup[i].idCheckBox, 0);
            }

            gcItemsSave = 0;

            CheckDlgButton(hwnd, DID_MSGSUSER, 0);
            CheckDlgButton(hwnd, DID_MSGSUNKNOWN, 0);

            break;

        case DID_MSGSDDE:
        case DID_MSGSCLIP:
        case DID_MSGSMOUSE:
        case DID_MSGSNC:
        case DID_MSGSKEYBD:
#ifdef FE_IME
        case DID_MSGSIME:
#endif
        case DID_MSGSBM:
        case DID_MSGSCB:
        case DID_MSGSEM:
        case DID_MSGSLB:
        case DID_MSGSSTM:
            for (i = 0; i < gcMsgGroups; i++)
            {
                if (gaMsgGroup[i].idCheckBox == nCmd)
                {
                    pmg = &gaMsgGroup[i];
                    break;
                }
            }

            fChecked = IsDlgButtonChecked(hwnd, pmg->idCheckBox);
            if (fChecked == 1)
                fChecked = FALSE;
            else
                fChecked = TRUE;

            hwndList = GetDlgItem(hwnd, DID_MSGSLIST);

            if (fChecked)
            {
                SendMessage(hwndList, WM_SETREDRAW, FALSE, 0);
                iTopIndex = SendMessage(hwndList, LB_GETTOPINDEX, 0, 0);
            }

            //
            // Get the list of currently selected items.
            //
            cItems = SendMessage(hwndList, LB_GETSELITEMS,
                gcMessages, (LPARAM)gaiSelected);

            //
            // Look for all the messages in this group.
            //
            for (i = 0, iSel = 0; i < gcMessages; i++)
            {
                pmd = (PMSGDESC)SendMessage(hwndList, LB_GETITEMDATA, i, 0);
                if (pmd->Flags & pmg->flMask)
                {
                    //
                    // Bump up through the list of selected items, looking
                    // to see if this item is currently selected.
                    //
                    for (fSel = FALSE; iSel < cItems &&
                        gaiSelected[iSel] <= i; iSel++)
                    {
                        //
                        // A match was found.  The item is selected.
                        //
                        if(gaiSelected[iSel] == i)
                        {
                            fSel = TRUE;
                            break;
                        }
                    }

                    //
                    // Is the current selection state of the item
                    // different from the desired selection state?
                    //
                    if (fSel != fChecked)
                    {
                        //
                        // Update the use counts of all groups that contain
                        // this message.
                        //
                        for (j = 0; j < gcMsgGroups; j++)
                        {
                            if (pmd->Flags & gaMsgGroup[j].flMask)
                            {
                                gaMsgGroup[j].cUseCount += fChecked ? 1 : -1;
                            }
                        }

                        //
                        // Select/deselect the message in the list box.
                        //
                        SendMessage(hwndList, LB_SETSEL, fChecked, i);
                    }
                }
            }

            //
            // Be sure that the checkboxes reflect the updated
            // status of the message group use counts.
            //
            MessagesUpdateCheckBoxes(hwnd);

            if (fChecked)
            {
                SendMessage(hwndList, LB_SETTOPINDEX, iTopIndex, 0);
                SendMessage(hwndList, WM_SETREDRAW, TRUE, 0);
                InvalidateRect(hwndList, NULL, FALSE);
            }

            gcItemsSave = SendMessage(hwndList, LB_GETSELITEMS,
                gcMessages, (LPARAM)gaiSelected);

            break;

        case IDOK:
            hwndList = GetDlgItem(hwnd, DID_MSGSLIST);
            cItems = SendMessage(hwndList, LB_GETSELITEMS,
                gcMessages, (LPARAM)gaiSelected);

            //
            // Unselect all messages.
            //
            for (i = 0; i < gcMessages; i++)
                gaMsgs[i].Flags &= ~MTF_SELECTED;

            //
            // Mark all the messages that are selected.
            //
            for (i = 0; i < cItems; i++)
            {
                pmd = (PMSGDESC)SendMessage(hwndList, LB_GETITEMDATA,
                    gaiSelected[i], 0);
                pmd->Flags |= MTF_SELECTED;
            }

            if (IsDlgButtonChecked(hwnd, DID_MSGSUSER))
                gfMsgsUser = TRUE;
            else
                gfMsgsUser = FALSE;

            if (IsDlgButtonChecked(hwnd, DID_MSGSUNKNOWN))
                gfMsgsUnknown = TRUE;
            else
                gfMsgsUnknown = FALSE;

#if 0  //Debug code!
for (i = 0; i < gcMsgGroups; i++)
{
    iSel = 0;
    for (j = 0; j < cItems; j++)
    {
        pmd = (PMSGDESC)SendMessage(hwndList, LB_GETITEMDATA,
            gaiSelected[j], 0);
        if (pmd->Flags & gaMsgGroup[i].flMask)
            iSel++;
    }

    if (iSel != gaMsgGroup[i].cUseCount)
    {
        DbgPrintf("Use counts are wrong!!!");
        for (j = 0; j < gcMsgGroups; j++)
        {
            DbgPrintf("cMsgs:%d Use:%d", gaMsgGroup[j].cMsgs, gaMsgGroup[j].cUseCount);
        }
    }
}
#endif // end debug code

            EndDialog(hwnd, IDOK);
            return TRUE;

        case IDCANCEL:
            EndDialog(hwnd, IDCANCEL);
            return TRUE;
    }

    return FALSE;
}



/*****************************************************************************\
* MessagesUpdateCheckBoxes
*
* Updates the message group checkboxes in the Messages dialog.
* This routine should be called when the use counts in the
* message group table are changed, so that the state of the
* checkboxes will get updated also.
*
* Arguments:
*   HWND hwnd - Dialog window handle.
*
* Returns:
*   VOID
\*****************************************************************************/

PRIVATE VOID
MessagesUpdateCheckBoxes(
    HWND hwnd
    )
{
    INT i;
    INT fState;

    for (i = 0; i < gcMsgGroups; i++)
    {
        if (gaMsgGroup[i].cUseCount == gaMsgGroup[i].cMsgs)
            fState = 1;
        else if (gaMsgGroup[i].cUseCount == 0)
            fState = 0;
        else
            fState = 2;

        CheckDlgButton(hwnd, gaMsgGroup[i].idCheckBox, fState);
    }
}