/*
 * GIZMOAPI.C
 *
 * API functions affecting a GizmoBar and a message processing
 * function to handle the equivalent called through messages.
 *
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
 *
 * Kraig Brockschmidt, Microsoft
 * Internet  :  kraigb@microsoft.com
 * Compuserve:  >INTERNET:kraigb@microsoft.com
 */


#include "inoledll.h"


/*
 * GBMessageHandler
 *
 * Purpose:
 *  Processes control messages that are equivalents of available
 *  control API.  The data passed with these messages is simply
 *  extracted from structures and passed as parameters to their
 *  equivalent function.
 *
 * Parameters:
 *  <Standard Message Parameters> plus
 *  pGB             PGIZMOBAR providing control-specific data.
 *
 * Return Value:
 *  LRESULT         Return value from equivalent API function.
 */

LRESULT GBMessageHandler(HWND hWnd, UINT iMsg, WPARAM wParam
    , LPARAM lParam, PGIZMOBAR pGB)
    {
    LRESULT         lRet=0L;
    LPCREATEGIZMO   pCG;
    LPGBMSG         pMsg;
    LPGBGETTEXT     pGT;
    LPGBGETINT      pGI;
    LPGBSETINT      pSI;

    if (NULL==pGB)
        return 0L;

    switch (iMsg)
        {
        case GBM_HWNDASSOCIATESET:
            lRet=(LRESULT)(UINT)GBHwndAssociateSet(hWnd
                , (HWND)wParam);
            break;

        case GBM_HWNDASSOCIATEGET:
            lRet=(LRESULT)(UINT)GBHwndAssociateGet(hWnd);
            break;

        case GBM_GIZMOADD:
            pCG=(LPCREATEGIZMO)lParam;
            lRet=(LRESULT)GBGizmoAdd(pCG->hWndParent, pCG->iType
                , pCG->iGizmo, pCG->uID, pCG->dx, pCG->dy
                , pCG->pszText, pCG->hBmp, pCG->iImage, pCG->uState);
            break;

        case GBM_GIZMOREMOVE:
            lRet=(LRESULT)GBGizmoRemove(hWnd, wParam);
            break;

        case GBM_GIZMOSENDMESSAGE:
            pMsg=(LPGBMSG)lParam;
            lRet=GBGizmoSendMessage(hWnd, wParam, pMsg->iMsg
                , pMsg->wParam, pMsg->lParam);
            break;

        case GBM_GIZMOSHOW:
            lRet=(LRESULT)GBGizmoShow(hWnd, wParam
                , (BOOL)LOWORD(lParam));
            break;

        case GBM_GIZMOENABLE:
            lRet=(LRESULT)GBGizmoEnable(hWnd, wParam
                , (BOOL)LOWORD(lParam));
            break;

        case GBM_GIZMOCHECK:
            lRet=(LRESULT)GBGizmoCheck(hWnd, wParam
                , (BOOL)LOWORD(lParam));
            break;

        case GBM_GIZMOFOCUSSET:
            lRet=(LRESULT)GBGizmoFocusSet(hWnd, wParam);
            break;

        case GBM_GIZMOEXIST:
            lRet=(LRESULT)GBGizmoExist(hWnd, wParam);
            break;

        case GBM_GIZMOTYPEGET:
            lRet=(LRESULT)GBGizmoTypeGet(hWnd, wParam);
            break;

        case GBM_GIZMODATASET:
            lRet=(LRESULT)GBGizmoDataSet(hWnd, wParam
                , (DWORD)lParam);
            break;

        case GBM_GIZMODATAGET:
            lRet=(LRESULT)GBGizmoDataGet(hWnd, wParam);
            break;

        case GBM_GIZMONOTIFYSET:
            lRet=(LRESULT)GBGizmoNotifySet(hWnd, wParam
                , (BOOL)LOWORD(lParam));
            break;

        case GBM_GIZMONOTIFYGET:
            lRet=(LRESULT)GBGizmoNotifyGet(hWnd, wParam);
            break;

        case GBM_GIZMOTEXTGET:
            pGT=(LPGBGETTEXT)lParam;
            lRet=(LRESULT)GBGizmoTextGet(hWnd, wParam, pGT->psz
                , pGT->cch);
            break;

        case GBM_GIZMOTEXTSET:
            GBGizmoTextSet(hWnd, wParam, (LPTSTR)lParam);
            break;

        case GBM_GIZMOINTGET:
            pGI=(LPGBGETINT)lParam;
            lRet=(LRESULT)GBGizmoIntGet(hWnd, wParam, &pGI->fSuccess
                , pGI->fSigned);
            break;


        case GBM_GIZMOINTSET:
            pSI=(LPGBSETINT)lParam;
            GBGizmoIntSet(hWnd, wParam, pSI->uValue, pSI->fSigned);
            break;

        default:
            break;
        }

    return lRet;
    }










/*
 * PGizmoFromHwndID
 *
 * Purpose:
 *  Retrieves the pGizmo for the given GizmoBar and the gizmo ID.
 *
 * Parameters:
 *  hWnd            HWND of a GizmoBar.
 *  uID             UINT gizmo identifier.
 *
 * Return Value:
 *  PGIZMO          NULL if the gizmo does not exist or hWnd is
 *                  invalid.  Non-NULL PGIZMO otherwise.
 */

PGIZMO PGizmoFromHwndID(HWND hWnd, UINT uID)
    {
    PGIZMOBAR     pGB;

    if (!IsWindow(hWnd))
        return FALSE;

    pGB=(PGIZMOBAR)GetWindowLong(hWnd, GBWL_STRUCTURE);

    if (NULL==pGB)
        return FALSE;

    return GizmoPFind(&pGB->pGizmos, uID);
    }






/*
 * GBHwndAssociateSet
 *
 * Purpose:
 *  Changes the associate window of a GizmoBar.
 *
 * Parameters:
 *  hWnd            HWND of the control window.
 *
 * Set Parameters:
 *  hWndAssociate   HWND of new associate.
 *
 * Return Value:
 *  HWND            Handle of previous associate.
 */

HWND WINAPI GBHwndAssociateSet(HWND hWnd, HWND hWndNew)
    {
    HWND        hWndOld=NULL;
    PGIZMOBAR   pGB;

    pGB=(PGIZMOBAR)GetWindowLong(hWnd, GBWL_STRUCTURE);

    if (NULL!=pGB)
        {
        hWndOld=pGB->hWndAssociate;
        pGB->hWndAssociate=hWndNew;

        if (NULL!=hWndOld)
            SendCommand(hWndOld, pGB->uID, GBN_ASSOCIATELOSS, hWnd);

        if (NULL!=hWndNew)
            SendCommand(hWndNew, pGB->uID, GBN_ASSOCIATEGAIN, hWnd);
        }

    return hWndOld;
    }





/*
 * GBHwndAssociateGet
 *
 * Purpose:
 *  Retrieves the associate window of a GizmoBar
 *
 * Parameters:
 *  hWnd            HWND of the control window.
 *
 * Set Parameters:
 *  hWndAssociate   HWND of new associate.
 *
 * Return Value:
 *  HWND            Handle of current associate.
 */

HWND WINAPI GBHwndAssociateGet(HWND hWnd)
    {
    HWND        hWndOld=NULL;
    PGIZMOBAR   pGB;

    pGB=(PGIZMOBAR)GetWindowLong(hWnd, GBWL_STRUCTURE);

    if (NULL!=pGB)
        hWndOld=pGB->hWndAssociate;

    return hWndOld;
    }





/*
 * GBGizmoAdd
 *
 * Purpose:
 *  Creates a new gizmo on the GizmoBar.  Subsequent operations
 *  should be done using the identifier, uID, for this gizmo.
 *
 * Parameters:
 *  hWnd            HWND of the GizmoBar.
 *  iType           UINT type of the gizmo to create.
 *  iGizmo          UINT position (zero-based) at which to place the
 *                  gizmo.
 *  uID             UINT identifier for WM_COMMAND from this gizmo.
 *  dx, dy          UINT dimensions of the gizmo.
 *  pszText         LPTSTR initial text for edit, list, combo, and
 *                  text gizmos.
 *  hBitmap         HBITMAP for gizmos of the button types (COMMAND
 *                  or ATTRIBUTE) specifies a source bitmap from
 *                  which the button image is taken.
 *  iImage          UINT index into hBitmap for the image for this
 *                  button.
 *  uState          UINT initial state of the gizmo.
 *
 * Return Value:
 *  BOOL            TRUE if creation succeeded, FALSE otherwise.
 */

BOOL WINAPI GBGizmoAdd(HWND hWnd, UINT iType, UINT iGizmo, UINT uID
    , UINT dx, UINT dy, LPTSTR pszText, HBITMAP hBmp, UINT iImage
    , UINT uState)
    {
    BOOL        fSuccess;
    PGIZMOBAR   pGB;
    PGIZMO      pGizmo;

    if (!IsWindow(hWnd))
        return FALSE;

    pGB=(PGIZMOBAR)GetWindowLong(hWnd, GBWL_STRUCTURE);

    if (NULL==pGB)
        return FALSE;

    /*
     * This automatically creates the windows, allocates structures,
     * includes the gizmo in pGB->pGizmos, and so forth.
     */
    pGizmo=GizmoPAllocate(&fSuccess, &pGB->pGizmos, hWnd, iType
        , iGizmo, uID, dx, dy, pszText, hBmp, iImage, uState);

    if (fSuccess)
        {
        if (NULL!=pGB->hWndAssociate)
            {
            SendCommand(pGB->hWndAssociate,GBN_GIZMOADDED, pGB->uID
                , hWnd);
            }

        InvalidateRect(hWnd, NULL, TRUE);
        UpdateWindow(hWnd);
        }
    else
        GizmoPFree(&pGB->pGizmos, pGizmo);

    return fSuccess;
    }





/*
 * GBGizmoRemove
 *
 * Purpose:
 *  Removes an existing gizmo from the GizmoBar.
 *
 * Parameters:
 *  hWnd            HWND of the GizmoBar.
 *  uID             UINT identifier for this gizmo.
 *
 * Return Value:
 *  BOOL            TRUE if deletion succeeded, FALSE otherwise.
 */

BOOL WINAPI GBGizmoRemove(HWND hWnd, UINT uID)
    {
    PGIZMOBAR   pGB;
    PGIZMO      pGizmo;

    if (!IsWindow(hWnd))
        return FALSE;

    pGB=(PGIZMOBAR)GetWindowLong(hWnd, GBWL_STRUCTURE);

    if (NULL==pGB)
        return FALSE;

    pGizmo=GizmoPFind(&pGB->pGizmos, uID);

    if (NULL==pGizmo)
        return FALSE;

    GizmoPFree(&pGB->pGizmos, pGizmo);

    if (NULL!=pGB->hWndAssociate)
        {
        SendCommand(pGB->hWndAssociate, GBN_GIZMOREMOVED, pGB->uID
            , hWnd);
        }

    InvalidateRect(hWnd, NULL, TRUE);
    UpdateWindow(hWnd);
    return TRUE;
    }






/*
 * GBGizmoSendMessage
 *
 * Purpose:
 *  Implements the equivalent of SendMessage to a gizmo in the
 *  GizmoBar.  Separators, command buttons, and attribute buttons
 *  do not accept messages.
 *
 * Parameters:
 *  hWnd            HWND of the GizmoBar.
 *  uID             UINT identifier of the gizmo to affect.
 *  iMsg            UINT message to send.
 *  wParam          WPARAM of the message.
 *  lParam          LPARAM of the message.
 *
 * Return Value:
 *  LRESULT         Return value from the message.  0L if the
 *                  gizmo does not accept messages.
 */

LRESULT WINAPI GBGizmoSendMessage(HWND hWnd, UINT uID, UINT iMsg
    , WPARAM wParam, LPARAM lParam)
    {
    PGIZMO      pGizmo;
    LONG        lRet=0L;

    pGizmo=PGizmoFromHwndID(hWnd, uID);

    if (NULL!=pGizmo && NULL!=pGizmo->hWnd)
        lRet=SendMessage(pGizmo->hWnd, iMsg, wParam, lParam);

    return lRet;
    }






/*
 * GBGizmoShow
 *
 * Purpose:
 *  Shows or hides a control, adjusting the positions of all others
 *  to make room for or reuse the space for this control.
 *
 * Parameters:
 *  hWnd            HWND of the GizmoBar.
 *  uID             UINT identifier of the gizmo to affect.
 *  fShow           BOOL TRUE to show the gizmo, FALSE to hide it.
 *