Programming Languages Suite/ProgLangD.iso/C++-7/DISK8/MFC/SAMPLES/MDI/HELLO.CP$/hello

Text File | 1992-03-18 | 4.4 KB | 184 lines

// hello.cpp : Defines the class behaviors for the Hello child 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 "mdi.h"

static COLORREF clrTextArray[] = { RGB (0,   0, 0), RGB (255, 0,   0),
                                   RGB (0, 255, 0), RGB (  0, 0, 255),
                                   RGB (255, 255, 255) } ;

/////////////////////////////////////////////////////////////////////////////
// CHelloWnd Member Functions


BEGIN_MESSAGE_MAP(CHelloWnd, CMDIChildWnd)
    ON_WM_CREATE()
    ON_COMMAND(IDM_BLACK, OnColor)
    ON_COMMAND(IDM_RED, OnColor)
    ON_COMMAND(IDM_GREEN, OnColor)
    ON_COMMAND(IDM_BLUE, OnColor)
    ON_COMMAND(IDM_WHITE, OnColor)
    ON_COMMAND(IDM_CUSTOM, OnColor)
    ON_WM_PAINT()
    ON_WM_MDIACTIVATE()
    ON_WM_DESTROY()
END_MESSAGE_MAP()

// Create:
// Register a custom WndClass and create a window.
// This must be done because CHelloWnd has a custom icon.
//
BOOL CHelloWnd::Create(LPCSTR szTitle, LONG style /* = 0 */,
    const RECT& rect /* = rectDefault */,
    CMDIFrameWnd* parent /* = NULL */)
{
    const char* pszHelloClass =
          AfxRegisterWndClass(CS_HREDRAW | CS_VREDRAW,
            LoadCursor(NULL, IDC_ARROW),
            (HBRUSH) (COLOR_WINDOW+1),
            LoadIcon(AfxGetInstanceHandle(), "hello"));

    return CMDIChildWnd::Create(pszHelloClass, szTitle, style, rect, parent);
}


// Constructor
// Do minimum initialization
//
CHelloWnd::CHelloWnd()
{
    m_nColor = 0;
    m_clrText = 0;
    m_pMenuCurrent = NULL;
    m_bWindowActive = FALSE;
}

// Destructor:
// Clean up menu iff Windows won't
//
CHelloWnd::~CHelloWnd()
{
    if (m_bWindowActive)
    {
        // Suppress Foundation DestroyMenu done in CMenu destructor
        // (Windows takes care of menu cleanup for the active window)
        //
        m_pMenuCurrent->Detach();
    }
}

// OnCreate:
// Set up colors -- this also could have been done in constructor
//
int CHelloWnd::OnCreate(LPCREATESTRUCT /* p */)
{
    m_nColor = IDM_BLACK;
    m_clrText = RGB (0, 0, 0);

    return 0;
}

// OnDestroy:
// Notify app main MDI frame window of destruction so it may
// do some cleanup.  Note: this uses a custom message -- see
// mdi.h and mdi.cpp for the custom message handler
//
void CHelloWnd::OnDestroy()
{
    m_pMDIFrameWnd->SendMessage(WM_CHILDDESTROY, (UINT)m_hWnd, 0);
}

// OnColor:
// Change menu checkmarks to indicate the newly selected color.
//
void CHelloWnd::OnColor()
{
    CMenu* pMenu = m_pMDIFrameWnd->GetMenu();
    pMenu->CheckMenuItem(m_nColor, MF_UNCHECKED);

    m_nColor = GetCurrentMessage()->wParam;
    pMenu->CheckMenuItem(m_nColor, MF_CHECKED);

    if (m_nColor != IDM_CUSTOM)
        m_clrText = clrTextArray[m_nColor - IDM_BLACK];
    else
    {
        CColorDialog dlgColor(m_clrText);
        if (dlgColor.DoModal() == IDOK)
            m_clrText = dlgColor.GetColor();
    }

    // Force the client area text to be repainted in the new color

    Invalidate();
}

// OnPaint:
// Draw a string in the center of the client area.
//
void CHelloWnd::OnPaint()
{
    CPaintDC dc(this);
    CRect rect;

    dc.SetTextColor(m_clrText);
    dc.SetBkColor(::GetSysColor(COLOR_WINDOW));
    GetClientRect(rect);
    dc.DrawText("Hello, World!", -1, rect,
        DT_SINGLELINE | DT_CENTER | DT_VCENTER);
}


// OnMDIActivate:
// This window is being activated or deactivated.
// Switch the menus appropriately.
//
void CHelloWnd::OnMDIActivate(BOOL bActivate, CWnd* /*pActive*/,
                              CWnd* /*pDeActive*/)
{
    CMDIFrameWnd* pFrame = m_pMDIFrameWnd;
    CMenu* pWinPopupMenu = NULL;
    CMenu* pMenu = NULL;

    m_bWindowActive = bActivate;

    if (bActivate)
    {
        pMenu = new CMenu;
        pMenu->LoadMenu("MdiMenuHello");
        pWinPopupMenu = pMenu->GetSubMenu(HELLO_MENU_POS);

        CMenu* pLastMenu = pFrame->MDISetMenu(pMenu, pWinPopupMenu);
        pLastMenu->DestroyMenu();

        pMenu->CheckMenuItem(m_nColor, MF_CHECKED);

        delete m_pMenuCurrent;
        m_pMenuCurrent = pMenu;
    }
    else
    {
        pMenu = new CMenu;
        pMenu->LoadMenu("MdiMenuInit");
        pWinPopupMenu = pMenu->GetSubMenu(INIT_MENU_POS);

        CMenu* pLastMenu = pFrame->MDISetMenu(pMenu, pWinPopupMenu);
        pLastMenu->DestroyMenu();

        delete m_pMenuCurrent;
        m_pMenuCurrent = pMenu;
    }

    pFrame->DrawMenuBar();
}