Programming Languages Suite/ProgLangD.iso/C++-7/DISK8/MFC/SAMPLES/SHOWFONT/DRAWING.CP$/drawing

Text File | 1992-03-07 | 4.9 KB | 167 lines

// drawing.cpp : Drawing functions for the ShowFont main window.
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and Microsoft
// QuickHelp documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "showfont.h"

/////////////////////////////////////////////////////////////////////////////

// InitDC:
// Prepare for drawing in this DC.
//
void CMainWindow::InitDC(CDC& dc)
{
    dc.SetBkMode(nBkMode);
    dc.SetBkColor(rgbBkColor);
    dc.SetTextColor(rgbTextColor);
    dc.SetTextAlign(nAlignLCR | nAlignTBB);
}

/////////////////////////////////////////////////////////////////////////////

// GetStringExtent:
// A helper function which calculates the extent of a string in a given font.
//
static short GetStringExtent(CDC& dc, PSTR pString, CFont* font)
{
    CFont* oldFont = dc.SelectObject(font);
    if (oldFont == NULL)
        return 0;

    CSize sizeExtent = dc.GetTextExtent(pString, strlen(pString));
    dc.SelectObject(oldFont);
    return (sizeExtent.cx);
}

/////////////////////////////////////////////////////////////////////////////

// StringOut:
// Helper routine for font-specific text out.
//
static short StringOut(CDC& dc, short x, short y, PSTR pString, CFont* newFont)
{
    CFont* oldFont = dc.SelectObject(newFont);
    if (oldFont == NULL)
        return 0;
    CSize sizeExtent = dc.GetTextExtent(pString, strlen(pString));
    dc.TextOut(x, y, pString, strlen(pString));
    dc.SelectObject(oldFont);
    return (sizeExtent.cx);
}

/////////////////////////////////////////////////////////////////////////////

// ShowString:
// Draw the string in the client area of this window at the current point.
//
void CMainWindow::ShowString()
{
    short nAlign;
    CFont italicFont, underlineFont, strikeOutFont, boldFont;

    LOGFONT logFont;
    pTheFont->GetObject(sizeof(LOGFONT), &logFont);
    logFont.lfItalic = TRUE;
    italicFont.CreateFontIndirect(&logFont);

    logFont.lfItalic = FALSE;
    logFont.lfUnderline = TRUE;
    underlineFont.CreateFontIndirect(&logFont);

    logFont.lfUnderline = FALSE;
    logFont.lfStrikeOut = TRUE;
    strikeOutFont.CreateFontIndirect(&logFont);

    logFont.lfStrikeOut = FALSE;
    logFont.lfWeight = FW_BOLD;
    boldFont.CreateFontIndirect(&logFont);

    // Draw text examples.
    //
    CClientDC dc(this);
    InitDC(dc);
    int x = ptCurrent.x;
    int y = ptCurrent.y;

    nAlign =  nAlignLCR | nAlignTBB;    /* GetTextAlign(hDC); */

    if ((nAlign & TA_CENTER) == TA_CENTER)
    {
        int tmpX = x;
        nAlignLCR = TA_LEFT;
        dc.SetTextAlign(nAlignLCR | nAlignTBB);
        x += StringOut(dc, x, y, ", and ", pTheFont);
        x += StringOut(dc, x, y, "strikeout", &strikeOutFont);
        x += StringOut(dc, x, y, " in a single line.", pTheFont);
        x = tmpX;

        nAlignLCR = TA_RIGHT;
        dc.SetTextAlign(nAlignLCR | nAlignTBB);
        x -= StringOut(dc, x, y, "underline", &underlineFont);
        x -= StringOut(dc, x, y, ", ", pTheFont);
        x -= StringOut(dc, x, y, "italic", &italicFont);
        x -= StringOut(dc, x, y, ", ", pTheFont);
        x -= StringOut(dc, x, y, "bold", &boldFont);
        x -= StringOut(dc, x, y, "You can use ", pTheFont);
        nAlignLCR = TA_CENTER;
    }
    else if ((nAlign & TA_CENTER) == TA_RIGHT)
    {
        x -= StringOut(dc, x, y, " in a single line.", pTheFont);
        x -= StringOut(dc, x, y, "strikeout", &strikeOutFont);
        x -= StringOut(dc, x, y, ", and ", pTheFont);
        x -= StringOut(dc, x, y, "underline", &underlineFont);
        x -= StringOut(dc, x, y, ", ", pTheFont);
        x -= StringOut(dc, x, y, "italic", &italicFont);
        x -= StringOut(dc, x, y, ", ", pTheFont);
        x -= StringOut(dc, x, y, "bold", &boldFont);
        x -= StringOut(dc, x, y, "You can use ", pTheFont);
    }
    else
    {
        x += StringOut(dc, x, y, "You can use ", pTheFont);
        x += StringOut(dc, x, y, "bold", &boldFont);
        x += StringOut(dc, x, y, ", ", pTheFont);
        x += StringOut(dc, x, y, "italic", &italicFont);
        x += StringOut(dc, x, y, ", ", pTheFont);
        x += StringOut(dc, x, y, "underline", &underlineFont);
        x += StringOut(dc, x, y, ", and ", pTheFont);
        x += StringOut(dc, x, y, "strikeout", &strikeOutFont);
        x += StringOut(dc, x, y, " in a single line.", pTheFont);
    }
}

/////////////////////////////////////////////////////////////////////////////

// ShowCharacterSet:
// Similar to ShowString, but show the entire character set in four rows.
//
void ShowCharacterSet(CDC& dc, CFont* newFont)
{
    CFont* oldFont = dc.SelectObject(newFont);
    if (oldFont == NULL)
        return;

    TEXTMETRIC TextMetric;

    dc.GetTextMetrics(&TextMetric);
    nLineSpace = (TextMetric.tmHeight + TextMetric.tmExternalLeading)*2;

    int y = ptCurrent.y;
    for (int iLine = 0; iLine < 4; iLine++)
    {
        dc.TextOut(ptCurrent.x, y, outputText[iLine], 64);
        y += nLineSpace;
    }
    dc.SelectObject(oldFont);
}