pagewin.cpp

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/*
 * PAGEWIN.CPP
 * Patron Chapter 20
 *
 * Window procedure for the Pages window and support functions.
 * This window manages its own scrollbars and viewport and provides
 * printing capabilities as well.
 *
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
 *
 * Kraig Brockschmidt, Microsoft
 * Internet  :  [e-mail]
 * Compuserve:  >INTERNET:[e-mail]
 */


#include "patron.h"


/*
 * PagesWndProc
 *
 * Purpose:
 *  Window procedure for the Pages window.
 */

LRESULT APIENTRY PagesWndProc(HWND hWnd, UINT iMsg, WPARAM wParam
    , LPARAM lParam)
    {
    PCPages         ppg;
    PAINTSTRUCT     ps;
    HDC             hDC;
    int             iPos, iTmp;
    int             iMin, iMax;
    UINT            idScroll;
    BOOL            fDirty=FALSE;

    ppg=(PCPages)GetWindowLong(hWnd, PAGEWL_STRUCTURE);

    switch (iMsg)
        {
        case WM_CREATE:
            ppg=(PCPages)((LPCREATESTRUCT)lParam)->lpCreateParams;
            SetWindowLong(hWnd, PAGEWL_STRUCTURE, (LONG)ppg);

            ppg->m_hWnd=hWnd;
            break;


        case WM_PAINT:
            /*
             * If there is currently a drag-rectangle showing, then
             * remove it before painting.  This insures that
             * painting doesn't blast part of that rectangle away so
             * that when we draw it next, garbage is left around.
             */
            if (ppg->m_fDragRectShown)
                ppg->DrawDropTargetRect(NULL, NULL);

            hDC=BeginPaint(hWnd, &ps);

            //Draw only if we have a page to show.
            if (0!=ppg->m_cPages)
                ppg->Draw(hDC, FALSE, FALSE);

            EndPaint(hWnd, &ps);

            //Turn the rectangle back on, if necessary.
            if (ppg->m_fDragRectShown)
                ppg->DrawDropTargetRect(NULL, NULL);
            break;


        case WM_HSCROLL:
        case WM_VSCROLL:
            idScroll=(WM_HSCROLL==iMsg) ? SB_HORZ : SB_VERT;

            iPos=GetScrollPos(hWnd, idScroll);
            iTmp=iPos;
            GetScrollRange(hWnd, idScroll, &iMin, &iMax);

            switch (LOWORD(wParam))
                {
                case SB_LINEUP:     iPos -= 20;  break;
                case SB_PAGEUP:     iPos -=100;  break;
                case SB_LINEDOWN:   iPos += 20;  break;
                case SB_PAGEDOWN:   iPos +=100;  break;

                case SB_THUMBPOSITION:
                    iPos=ScrollThumbPosition(wParam, lParam);
                    break;

                //We don't want scrolling on this message.
                case SB_THUMBTRACK:
                    return 0L;
                }

            iPos=max(iMin, min(iPos, iMax));

            if (iPos!=iTmp)
                {
                //Set the new position and scroll the window
                SetScrollPos(hWnd, idScroll, iPos, TRUE);

                if (SB_HORZ==idScroll)
                    {
                    ppg->m_xPos=iPos;
                    ScrollWindow(hWnd, iTmp-iPos, 0, NULL, NULL);
                    }
                else
                    {
                    ppg->m_yPos=iPos;
                    ScrollWindow(hWnd, 0, iTmp-iPos, NULL, NULL);
                    }
                }

            break;

        case WM_RBUTTONDOWN:
            if (NULL==ppg->m_pPageCur)
                break;

            fDirty=ppg->m_pPageCur->OnRightDown(wParam
                , LOWORD(lParam), HIWORD(lParam));
            break;

        case WM_LBUTTONDOWN:
            if (NULL==ppg->m_pPageCur)
                break;

            fDirty=ppg->m_pPageCur->OnLeftDown(wParam
                , LOWORD(lParam), HIWORD(lParam));
            break;

        case WM_LBUTTONUP:
            if (NULL==ppg->m_pPageCur)
                break;

            fDirty=ppg->m_pPageCur->OnLeftUp(wParam
                , LOWORD(lParam), HIWORD(lParam));
            break;

        case WM_LBUTTONDBLCLK:
            if (NULL==ppg->m_pPageCur)
                break;

            fDirty=ppg->m_pPageCur->OnLeftDoubleClick(wParam, LOWORD(lParam)
                , HIWORD(lParam));
            break;

        case WM_MOUSEMOVE:
            if (NULL==ppg->m_pPageCur)
                break;

            ppg->m_pPageCur->OnMouseMove(wParam, LOWORD(lParam)
                , HIWORD(lParam));
            break;

        case WM_TIMER:
            if (NULL==ppg->m_pPageCur)
                break;

            ppg->m_pPageCur->OnTimer(wParam);
            break;

        case WM_NCHITTEST:
            if (NULL!=ppg->m_pPageCur)
                {
                /*
                 * This just saves information in the page for
                 * OnSetCursor
                 */
                ppg->m_pPageCur->OnNCHitTest(LOWORD(lParam)
                    , HIWORD(lParam));
                }

            return DefWindowProc(hWnd, iMsg, wParam, lParam);

        case WM_SETCURSOR:
            if (NULL!=ppg->m_pPageCur)
                {
                if (ppg->m_pPageCur->OnSetCursor(LOWORD(lParam)))
                    break;
                }

            return DefWindowProc(hWnd, iMsg, wParam, lParam);


        default:
            return DefWindowProc(hWnd, iMsg, wParam, lParam);
        }

    ppg->m_fDirty |= fDirty;
    return 0L;
    }



/*
 * RectConvertMappings
 *
 * Purpose:
 *  Converts the contents of a rectangle from device to logical
 *  coordinates where the hDC defines the logical coordinates.
 *
 * Parameters:
 *  pRect           LPRECT containing the rectangle to convert.
 *  hDC             HDC describing the logical coordinate system.
 *                  if NULL, uses a screen DC in MM_LOMETRIC.
 *  fToDevice       BOOL TRUE to convert from uConv to device,
 *                  FALSE to convert device to uConv.
 *
 * Return Value:
 *  None
 */

void RectConvertMappings(LPRECT pRect, HDC hDC, BOOL fToDevice)
    {
    POINT   rgpt[2];
    BOOL    fSysDC=FALSE;

    if (NULL==pRect)
        return;

    rgpt[0].x=pRect->left;
    rgpt[0].y=pRect->top;
    rgpt[1].x=pRect->right;
    rgpt[1].y=pRect->bottom;

    if (NULL==hDC)
        {
        hDC=GetDC(NULL);
        SetMapMode(hDC, MM_LOMETRIC);
        fSysDC=TRUE;
        }

    if (fToDevice)
        LPtoDP(hDC, rgpt, 2);
    else
        DPtoLP(hDC, rgpt, 2);

    if (fSysDC)
        ReleaseDC(NULL, hDC);

    pRect->left=rgpt[0].x;
    pRect->top=rgpt[0].y;
    pRect->right=rgpt[1].x;
    pRect->bottom=rgpt[1].y;

    return;
    }






/*
 * CPages::Draw
 *
 * Purpose:
 *  Paints the current page in the pages window.
 *
 * Parameters:
 *  hDC             HDC to draw on, could be a metafile or printer
 *                  DC or any other type of DC.
 *  fNoColor        BOOL indicating if we should use screen colors
 *                  or printer colors (B&W).  Objects are printed
 *                  as-is, however.  This is TRUE for printer DCs
 *                  or print preview.
 *  fPrinter        BOOL indicating if this is a printer DC in which
 *                  case we eliminate some of the fancy drawing,
 *                  like shadows on the page and so forth.
 *
 * Return Value:
 *  None
 */

void CPages::Draw(HDC hDC, BOOL fNoColor, BOOL fPrinter)
    {
    RECT            rc, rcT;
    UINT            uMM;
    HPEN            hPen;
    HBRUSH          hBrush;
    HGDIOBJ         hObj1, hObj2;
    COLORREF        cr;
    TCHAR           szTemp[20];
    UINT            cch;
    SIZE            sz;
    PCPage          pPage;
    RECT            rcPos;

    //Make sure the DC is in LOMETRIC