개발공부

void _Rectangle(HDC hdc, int x1, int y1, int x2, int y2, COLORREF crPen, COLORREF crBrush) {
    HBRUSH      newBrush,   oldBrush;
    HPEN        newPen,     oldPen;

    // 브러쉬 모양 (Solid, Hatch) 
    int nRandBrush = rand() % 2;
    if (g_nWidth && g_nHeight) {
        //newBrush    = CreateSolidBrush(crBrush);
        if (nRandBrush) {
            newBrush = CreateSolidBrush(_RandColor());
        }
        else {
            // HatchBrush 모양 총 6개
            newBrush = CreateHatchBrush(rand() % 6, _RandColor());
        }
        oldBrush    = (HBRUSH)SelectObject(hdc, newBrush);
        newPen      = CreatePen(rand() % 7, _FontWidth(), crPen);
        oldPen      = (HPEN)SelectObject(hdc, newPen);

        Rectangle(hdc, x1, y1, x2, y2);

        SelectObject(hdc, oldBrush);
        DeleteObject(newBrush);
        SelectObject(hdc, oldPen);
        DeleteObject(newPen);
    }
}


void _Line(HDC hdc, int x1, int y1, int x2, int y2, COLORREF crPen) { 
    HBRUSH      newBrush, oldBrush; 

    if (g_nWidth && g_nHeight) { 
        newBrush = CreateSolidBrush(crPen); 
        oldBrush = (HBRUSH)SelectObject(hdc, newBrush); 

        MoveToEx(hdc, x1, y1, NULL); 
        LineTo(hdc, x2, y2); 
         
        SelectObject(hdc, oldBrush); 
        DeleteObject(newBrush); 
         
    } 
}


void _Ellipse(HDC hdc, int x1, int y1, int x2, int y2, COLORREF crPen, COLORREF crBrush) {
    HBRUSH      newBrush,   oldBrush;
    HPEN        newPen,     oldPen;

    if (g_nWidth && g_nHeight) {
        newBrush    = CreateSolidBrush(crBrush);
        oldBrush    = (HBRUSH)SelectObject(hdc, newBrush);
        newPen      = CreatePen(rand() % 7, _FontWidth(), crPen);
        oldPen      = (HPEN)SelectObject(hdc, newPen);

        Ellipse(hdc, x1, y1, x2, y2);

        SelectObject(hdc, oldBrush);
        DeleteObject(newBrush);
        SelectObject(hdc, oldPen);
        DeleteObject(newPen);
    }
}


void _CrossLine(HDC hdc, int x1, int y1, int x2, int y2) {
    HPEN newPen, oldPen;
    newPen = CreatePen(PS_DOT, 1, RGB(0, 0, 0));
    oldPen = (HPEN)SelectObject(hdc, newPen);

    if (g_nWidth && g_nHeight) {
        _Line(hdc, 
                x1 + (x2 - x1) / 2, 
                y1, 
                x1 + (x2 - x1) / 2, 
                y2, RGB(0, 0, 0));
        _Line(hdc, 
                x1, 
                y1 + (y2 - y1) / 2, 
                x2, 
                y1 + (y2 - y1) / 2, RGB(0, 0, 0));
    }

    SelectObject(hdc, oldPen);
    DeleteObject(newPen);
}


void _RandRect(HDC hdc, int nClientWidth, int nClientHeight) {
    HBRUSH      newBrush, oldBrush;
    HPEN        newPen,     oldPen;

    // 브러쉬 모양 (Solid, Hatch) 
    int nRandBrush  = rand() % 2;

    // 도형 모양 (Rectangle, RoundRectangle, Ellipse)
    int nRandFunc   = rand() % 3;

    // 랜덤 Brush색 
    if (g_nWidth && g_nHeight) {
        if (nRandBrush) {
            newBrush = CreateSolidBrush(_RandColor());
        }
        else {
            // HatchBrush 모양 총 6개
            newBrush = CreateHatchBrush(rand() % 6, _RandColor());
        }

        oldBrush = (HBRUSH)SelectObject(hdc, newBrush);
        newPen = CreatePen(rand() % 7, _FontWidth(), _RandColor());
        oldPen = (HPEN)SelectObject(hdc, newPen);


        switch (nRandFunc) {
        case 0:
            // 사각형
            _Rectangle(hdc, rand() % nClientWidth, 
                            rand() % nClientHeight, 
                            rand() % nClientWidth, 
                            rand() % nClientHeight,
                            _RandColor(), _RandColor());
            break;

        case 1:
            // 모서리 둥근 사각형
            RoundRect(hdc, rand() % nClientWidth,
                           rand() % nClientHeight,
                           rand() % nClientWidth,
                           rand() % nClientHeight,
                           rand() % 3,
                           rand() % 3);
            break;

        case 2:
            // 원
            _Ellipse(hdc, rand() % nClientWidth,
                          rand() % nClientHeight,
                          rand() % nClientWidth,
                          rand() % nClientHeight,
                          _RandColor(), _RandColor());
            break;
        }

        SelectObject(hdc, oldBrush);
        DeleteObject(newBrush);
        SelectObject(hdc, oldPen);
        DeleteObject(newPen);
    }
}