Windows Kernel

Development Platform:
Visual C++

custfont.c：Code Content
							/*  CUSTFONT.C
**
**  Copyright (C) Microsoft, 1993, All Rights Reserved.
**
**  History:
**
*/
#include "precomp.h"
#pragma hdrstop
static struct
{
        UINT wWidth;
        UINT wHeight;
        UINT wSizeFontId;
        UINT wStartPos;
        UINT wStartPix;
} g;
static UINT g_iCurPercent;
static RECT g_rcRuler;
static TCHAR g_szRulerDirections[200];
static TCHAR g_szSample[100];
static TCHAR g_szSampleFace[32];
static int g_cxRulerDirections;
static BOOL g_bTypeTimer = FALSE;
static TCHAR szPctD[] = TEXT("%d");
static TCHAR szPercentNum[] = TEXT("%d%%");
#define NUM_DEFPERCENTS 5
static UINT g_DefaultPercents[NUM_DEFPERCENTS] = {75, 100, 125, 150, 200};
#define MAX_PERCENT     500
#define MIN_PERCENT     20
#define GETPERCENT(dpi) ((dpi * 100 + 50) / 96)
#define GETDPI(percent) ((percent * 96 + 48) /100)
#define UPDATE_CURPER   0x0001
#define UPDATE_COMBO    0x0002
#define UPDATE_SAMPLE   0x0004
#define UPDATE_RULER    0x0008
#define UPDATE_ALL      0x000F
void NEAR PASCAL DrawRuler(HWND hDlg, LPDRAWITEMSTRUCT lpdis)
{
    int nFact;
    RECT rc;
    HDC hdc;
    int nPixInch;
    int i, j;
    TCHAR szTemp[10];
    int nOldMode;
    hdc = lpdis->hDC;
    nOldMode = SetBkMode(hdc, TRANSPARENT);
    // use g_rcRuler to draw the ruler.  it's already been spaced
    rc = g_rcRuler;
    // first, draw the directions
    i = rc.left + ((rc.right - rc.left) - g_cxRulerDirections)/2;
    TextOut(hdc, i, lpdis->rcItem.top + g.wHeight/4,
                                g_szRulerDirections, lstrlen(g_szRulerDirections));
    nPixInch = GETDPI(g_iCurPercent);
    // draw the top and left edge of the ruler
    DrawEdge(hdc, &rc, EDGE_ETCHED, BF_TOPLEFT);
    // rest of drawing happens just below the top
    rc.top += GetSystemMetrics(SM_CYEDGE);
    nFact = 1;
    // draw one of the etch heights (1", 1/2", 1/4") per iteration
    for (j=0; j<3; ++j)
    {
        for (i=0; ; ++i)
        {
            rc.left = g_rcRuler.left + (j==0 ? i*nPixInch : (2*i+1)*nPixInch/nFact);
            if (rc.left >= g_rcRuler.right)
            {
                break;
            }
            DrawEdge(hdc, &rc, EDGE_ETCHED, BF_LEFT | BF_ADJUST);
            // dominant etch deserves a number
            if (j == 0)
            {
                TextOut(hdc, rc.left+1, rc.bottom-g.wHeight,
                                        szTemp, wsprintf(szTemp, szPctD, i));
            }
        }
        rc.bottom -= (rc.bottom - rc.top)/2;
        nFact *= 2;
    }
    SetBkMode(hdc, nOldMode);
}
void NEAR PASCAL CF_UpdateRuler(HWND hDlg)
{
    RECT rc;
    HWND hwnd;
    /* Don't do this stuff if the dialog is not
    ** visible yet, or other windows will flash.
    */
    if (IsWindowVisible(hDlg))
    {
        // don't invalidate top and left because they never change.
        rc = g_rcRuler;
        rc.left += GetSystemMetrics(SM_CXEDGE);
        rc.top += GetSystemMetrics(SM_CYEDGE);
        hwnd = GetDlgItem(hDlg, IDC_CUSTOMRULER);
        InvalidateRect(hwnd, &rc, TRUE);
        UpdateWindow(hwnd);
    }
}
void NEAR PASCAL CF_ShowNewPercent(HWND hDlg, UINT uPer)
{
    TCHAR szBuf[10];
    g_iCurPercent = uPer;
    wsprintf(szBuf, szPercentNum, uPer);
    SetWindowText(GetDlgItem(hDlg, IDC_CUSTOMCOMBO), szBuf);
    UpdateWindow(GetDlgItem(hDlg, IDC_CUSTOMCOMBO));
}
// Build lf with given face and height
//
int CALLBACK EnumProc(CONST LOGFONT *lplf, CONST TEXTMETRIC *lptm, DWORD nType, LPARAM lpData )
{
    *(LPLOGFONT)lpData = *lplf;
    return FALSE;
}
HFONT CreateFontWithFace(HWND hwnd, int nHeight, LPCTSTR lpszFace)
{
    LOGFONT lf;
    HDC     hdc;
    if(hdc = GetDC(hwnd))
    {
        EnumFontFamilies(hdc, lpszFace, EnumProc, (LPARAM)&lf);
        ReleaseDC(hwnd,hdc);
    }
    lf.lfHeight = nHeight;
    lf.lfWidth = lf. lfEscapement = lf.lfOrientation = 0;
    return CreateFontIndirect(&lf);
}
void NEAR PASCAL CF_UpdateData(HWND hDlg, UINT uPer, UINT flags)
{
    TCHAR szBuf[100];
    HFONT hfont;
    int i;
    HWND hwnd;
    int iDPI;
    if (flags & UPDATE_CURPER)
    {
        if (uPer == g_iCurPercent)
            return;
        if (uPer < MIN_PERCENT)
            uPer = MIN_PERCENT;
        else if (uPer > MAX_PERCENT)
            uPer = MAX_PERCENT;
        g_iCurPercent = uPer;
    }
    if (flags & UPDATE_COMBO)
    {
        hwnd = GetDlgItem(hDlg, IDC_CUSTOMCOMBO);
        wsprintf(szBuf, szPercentNum, g_iCurPercent);
        i = (int)SendMessage(hwnd, CB_FINDSTRINGEXACT, 0, (LPARAM)szBuf);
        SendMessage(hwnd, CB_SETCURSEL, (WPARAM)i, 0L);
        if (i == -1)
        {
            SetWindowText(hwnd, szBuf);
            UpdateWindow(hwnd);
        }
    }
    if (flags & UPDATE_RULER)
        CF_UpdateRuler(hDlg);
    if (flags & UPDATE_SAMPLE)
    {
        iDPI = GETDPI(g_iCurPercent);
        // build and set string with DPI info
        hwnd = GetDlgItem(hDlg, IDC_CUSTOMSAMPLE);
        wsprintf(szBuf, g_szSample, (LPTSTR)g_szSampleFace, iDPI);
        SetWindowText(hwnd, szBuf);
        hfont = CreateFontWithFace(hwnd, -10 * iDPI / 72, g_szSampleFace);
        if (hfont)
        {
            hfont = (HFONT)SendMessage(hwnd, WM_SETFONT, (WPARAM)hfont, 1L);
            if (hfont)
                DeleteObject(hfont);
        }
    }
}
void NEAR PASCAL CF_ReadNewPercent(HWND hDlg)
{
    TCHAR szBuf[10];
    LPTSTR pstr;
    UINT uPer = 0;
    GetWindowText(GetDlgItem(hDlg, IDC_CUSTOMCOMBO), szBuf, ARRAYSIZE(szBuf));
    pstr = szBuf;
    while (*pstr && (*pstr != TEXT('%')))
    {
        if (*pstr >= TEXT('0') && *pstr <= TEXT('9'))
            uPer = uPer * 10 + (*pstr - TEXT('0'));
        pstr++;
    }
    CF_UpdateData(hDlg, uPer, UPDATE_ALL);
}
void NEAR PASCAL CF_InitDialog(HWND hDlg, UINT uDPI)
{
    HWND hwnd;
    HDC hdc;
    HFONT hfont;
    SIZE  szSize;
    int i;
    TCHAR szBuf[10];
    int iCurSel;
    g_iCurPercent = GETPERCENT(uDPI);
    hwnd = GetDlgItem(hDlg, IDC_CUSTOMCOMBO);
    iCurSel = -1;               // assume not in list
    for (i = 0; i < NUM_DEFPERCENTS; i++)
    {
        wsprintf(szBuf, szPercentNum, g_DefaultPercents[i]);
        SendMessage(hwnd, CB_INSERTSTRING, (WPARAM)i, (LPARAM)szBuf);
        SendMessage(hwnd, CB_SETITEMDATA, (WPARAM)i, g_DefaultPercents[i]);
        if (g_iCurPercent == g_DefaultPercents[i])
            iCurSel = i;
    }
    SendMessage(hwnd, CB_SETCURSEL, (WPARAM)iCurSel, 0L);
    if (iCurSel == -1)
    {
        wsprintf(szBuf, szPercentNum, g_iCurPercent);
        SetWindowText(hwnd, szBuf);
    }
    hdc = GetDC(hDlg);
    hfont = (HFONT)SendMessage(hDlg, WM_GETFONT, 0, 0L);
    if (hfont)
        hfont = SelectObject(hdc, hfont);
    //dwSize = GetTextExtentPoint32(hdc, TEXT("0"), 1);
    GetTextExtentPoint32(hdc, TEXT("0"), 1, &szSize);
    g.wWidth = szSize.cx;
    g.wHeight = szSize.cy;
    LoadString(hInstance, IDS_RULERDIRECTION, g_szRulerDirections, ARRAYSIZE(g_szRulerDirections));
    //g_cxRulerDirections = LOWORD(GetTextExtent(hdc, g_szRulerDirections, lstrlen(g_szRulerDirections)));
    GetTextExtentPoint32(hdc, g_szRulerDirections, lstrlen(g_szRulerDirections), &szSize);
    g_cxRulerDirections = szSize.cx;
    if (hfont)
        SelectObject(hdc, hfont);
    ReleaseDC(hDlg, hdc);
    // calculate the rectangle for the actual ruler drawing in relation
    // to its window
    GetClientRect(GetDlgItem(hDlg, IDC_CUSTOMRULER), &g_rcRuler);
    g_rcRuler.left += g.wWidth;
    g_rcRuler.right -= g.wWidth;
    // room for explanatory string
    g_rcRuler.top += g.wHeight + g.wHeight/2;
    // bottom offset like the sides
    g_rcRuler.bottom -= g.wWidth;
    LoadString(hInstance, IDS_10PTSAMPLE, g_szSample, ARRAYSIZE(g_szSample));
    LoadString(hInstance, IDS_10PTSAMPLEFACENAME, g_szSampleFace, ARRAYSIZE(g_szSampleFace));
    CF_UpdateData(hDlg, 0, UPDATE_SAMPLE);
}
/////////////////////////////////////////////////////////////////////////////
const static DWORD FAR aCustFontHelpIds[] = {
        // IDC_NO_HELP_1,      IDH_COMM_GROUPBOX,
        IDC_CUSTOMCOMBO, IDH_DISPLAY_SETTINGS_ADVANCED_GENERAL_CUSTOMFONT_LISTBOX,
        IDC_CUSTOMRULER, IDH_DISPLAY_SETTINGS_ADVANCED_GENERAL_CUSTOMFONT_RULER,
        IDC_CUSTOMSAMPLE,IDH_DISPLAY_SETTINGS_ADVANCED_GENERAL_CUSTOMFONT_SAMPLE,
        0, 0
};
BOOL CALLBACK CustomFontDlgProc(HWND hDlg, UINT uMessage, WPARAM wParam, LPARAM lParam)
{
    HFONT hfont;
    int i;
    switch (uMessage)
    {
        case WM_CREATE:
            break;
        case WM_INITDIALOG:
            CF_InitDialog(hDlg, (UINT)lParam);
            break;
        case WM_DESTROY:
            hfont = (HFONT)SendDlgItemMessage(hDlg, IDC_CUSTOMSAMPLE, WM_GETFONT, 0, 0L);
            if (hfont)
                DeleteObject(hfont);
            break;
        case WM_DRAWITEM:
            if (wParam == IDC_CUSTOMRULER)
                DrawRuler(hDlg, (LPDRAWITEMSTRUCT)lParam);
            break;
        case WM_TIMER:
            if (g_bTypeTimer)
            {
                KillTimer(hDlg, 13);
                g_bTypeTimer = FALSE;
                CF_ReadNewPercent(hDlg);
            }
            break;
        case WM_HELP:
            WinHelp((HWND)((LPHELPINFO)lParam)->hItemHandle, TEXT("display.hlp"), HELP_WM_HELP,
                (DWORD_PTR)(LPTSTR)aCustFontHelpIds);
            break;
        case WM_CONTEXTMENU:
            WinHelp((HWND)wParam, TEXT("display.hlp"), HELP_CONTEXTMENU,
                (DWORD_PTR)(LPTSTR)aCustFontHelpIds);
            break;
        case WM_COMMAND:
            switch (LOWORD(wParam))
            {
                case IDOK:
                    EndDialog(hDlg, GETDPI(g_iCurPercent));
                    break;
                case IDCANCEL:
                    EndDialog(hDlg, 0);
                    break;
                case IDC_CUSTOMRULER:
                    switch (HIWORD(wParam))
                    {
                        case DSN_NCCREATE:
                            SetWindowLong((HWND)lParam, GWL_EXSTYLE,
                                    GetWindowLong((HWND)lParam, GWL_EXSTYLE) | WS_EX_WINDOWEDGE);
                            break;
                        case DSN_BEGINDRAG:
                            // Set the focus to the corresponding edit ctl
                            SendMessage(hDlg, WM_NEXTDLGCTL,
                                        (WPARAM)GetDlgItem(hDlg, IDC_CUSTOMCOMBO), 1L);
                            SendMessage((HWND)lParam, DSM_DRAGPOS, 0, (LPARAM)&(g.wStartPos));
                            if ((int)g.wStartPos < g_rcRuler.left)
                            {
                                g.wStartPos = g_rcRuler.left;
                            }
                            g.wStartPix = g_iCurPercent;
                            break;
                        case DSN_DRAGGING:
                        {
                            UINT wNow, wPix;
                            POINT pt;
                            //wNow = LOWORD(SendMessage((HWND)lParam, DSM_DRAGPOS, 0, 0L));
                            SendMessage((HWND)lParam, DSM_DRAGPOS, 0, (LPARAM)&pt);
                            wNow = pt.x;
                            if ((int)wNow < g_rcRuler.left)
                            {
                                wNow = g_rcRuler.left;
                            }
                            wPix = LOWORD((DWORD)wNow*g.wStartPix/g.wStartPos);
                            if (wPix < MIN_PERCENT)
                            {
                                wPix = MIN_PERCENT;
                            }
                            if (wPix > MAX_PERCENT)
                            {
                                wPix = MAX_PERCENT;
                            }
                            if (wPix != g_iCurPercent)
                            {
                                CF_ShowNewPercent(hDlg, wPix);
                                CF_UpdateRuler(hDlg);
                            }
                            break;
                        }
                        case DSN_ENDDRAG:
                            CF_UpdateData(hDlg, 0, UPDATE_COMBO | UPDATE_SAMPLE);
                            break;
                        default:
                            break;
                        }
                    break;
                case IDC_CUSTOMCOMBO:
                    switch(HIWORD(wParam))
                    {
                        case CBN_SELCHANGE:
                            i = (int)SendDlgItemMessage(hDlg, IDC_CUSTOMCOMBO, CB_GETCURSEL, 0, 0L);
                            if (i != CB_ERR)
                            {
                                i = LOWORD(SendDlgItemMessage(hDlg, IDC_CUSTOMCOMBO, CB_GETITEMDATA, (WPARAM)i, 0L));
                                CF_UpdateData(hDlg, (UINT)i, UPDATE_CURPER | UPDATE_SAMPLE | UPDATE_RULER);
                            }
                            break;
                        case CBN_EDITCHANGE:
                            if (g_bTypeTimer)
                            {
                                KillTimer(hDlg, 13);
                            }
                            g_bTypeTimer = TRUE;
                            SetTimer(hDlg, 13, 500, NULL);
                            break;
                    }
                    break;
                default:
                        return(FALSE);
            }
            break;
        default:
            return(FALSE);
    }
    return(TRUE);
}

						