rygwnd.cpp

不好意思

// RygWnd.cpp : implementation file
//

#include "stdafx.h"
#include "Ex20d.h"
#include "RygWnd.h"

LRESULT CALLBACK AFX_EXPORT
    RygWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    AFX_MANAGE_STATE(AfxGetStaticModuleState());

    CWnd* pWnd;

    pWnd = CWnd::FromHandlePermanent(hWnd);
    if (pWnd == NULL) {
        // Assume that client created a CRygWnd window
        pWnd = new CRygWnd();
        pWnd->Attach(hWnd);
    }
    ASSERT(pWnd->m_hWnd == hWnd);
    ASSERT(pWnd == CWnd::FromHandlePermanent(hWnd));
    LRESULT lResult = AfxCallWndProc(pWnd, hWnd, message,
                                     wParam, lParam);
    return lResult;
}


// static data members
CRect  CRygWnd::s_rect(-500, 1000, 500, -1000); // outer rectangle
CPoint CRygWnd::s_point(300, 300); // rounded corners
CRect  CRygWnd::s_rColor[] = {CRect(-250, 800, 250, 300),
                              CRect(-250, 250, 250, -250),
                              CRect(-250, -300, 250, -800)};
CBrush CRygWnd::s_bColor[] = {RGB(192, 192, 192),
                              RGB(0xFF, 0x00, 0x00),
                              RGB(0xFF, 0xFF, 0x00),
                              RGB(0x00, 0xFF, 0x00)};

BOOL CRygWnd::RegisterWndClass(HINSTANCE hInstance) // static member
                                                    //  function
{
    WNDCLASS wc;
    wc.lpszClassName = "RYG"; // matches class name in client
    wc.hInstance = hInstance;
    wc.lpfnWndProc = RygWndProc;
    wc.hCursor = ::LoadCursor(NULL, IDC_ARROW);
    wc.hIcon = 0;
    wc.lpszMenuName = NULL;
    wc.hbrBackground = (HBRUSH) ::GetStockObject(LTGRAY_BRUSH);
    wc.style = CS_GLOBALCLASS;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    return (::RegisterClass(&wc) != 0);
}


// CRygWnd

IMPLEMENT_DYNAMIC(CRygWnd, CWnd)
CRygWnd::CRygWnd()
{
	m_nState = 0;
    TRACE("CRygWnd constructor\n");
}

CRygWnd::~CRygWnd()
{
	TRACE("CRygWnd destructor\n");
}


BEGIN_MESSAGE_MAP(CRygWnd, CWnd)
	ON_MESSAGE(RYG_SETSTATE, OnSetState)
    ON_MESSAGE(RYG_GETSTATE, OnGetState)
	ON_WM_PAINT()
	ON_WM_LBUTTONDOWN()
END_MESSAGE_MAP()

void CRygWnd::SetMapping(CDC* pDC)
{
    CRect clientRect;
    GetClientRect(clientRect);
    pDC->SetMapMode(MM_ISOTROPIC);
    pDC->SetWindowExt(1000, 2000);
    pDC->SetViewportExt(clientRect.right, -clientRect.bottom);
    pDC->SetViewportOrg(clientRect.right / 2, clientRect.bottom / 2);
}

void CRygWnd::UpdateColor(CDC* pDC, int n)
{
    if (m_nState == n + 1) {
        pDC->SelectObject(&s_bColor[n+1]);
    }
    else {
        pDC->SelectObject(&s_bColor[0]);
    }
    pDC->Ellipse(s_rColor[n]);
}


// CRygWnd message handlers


void CRygWnd::OnPaint()
{
	int i;
    CPaintDC dc(this); // device context for painting
    SetMapping(&dc);
    dc.SelectStockObject(DKGRAY_BRUSH);
    dc.RoundRect(s_rect, s_point);
    for (i = 0; i < 3; i++) {
        UpdateColor(&dc, i);
    }

}

void CRygWnd::OnLButtonDown(UINT nFlags, CPoint point)
{
	
    // Notification code is HIWORD of wParam, 0 in this case
    GetParent()->SendMessage(WM_COMMAND, GetDlgCtrlID(),
        (LONG) GetSafeHwnd()); // 0

}

void CRygWnd::PostNcDestroy()
{
	TRACE("CRygWnd::PostNcDestroy\n");
    delete this; // CWnd::PostNcDestroy does nothing
}

LRESULT CRygWnd::OnSetState(WPARAM wParam, LPARAM lParam)
{
    TRACE("CRygWnd::SetState, wParam = %d\n", wParam);
    m_nState = (int) wParam;
    Invalidate(FALSE);
    return 0L;
}

LRESULT CRygWnd::OnGetState(WPARAM wParam, LPARAM lParam)
{
    TRACE("CRygWnd::GetState\n");
    return m_nState;
}