persist.cpp

vc++技术内幕范例

// persist.cpp : implementation of the CPersistentFrame class

#include "stdafx.h"
#include "persist.h"

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
//////////////////////////////////////////////////////////////////////////
// CPersistentFrame

const CRect NEAR CPersistentFrame::rectDefault(10, 10, 500, 400);  // static

IMPLEMENT_DYNAMIC(CPersistentFrame, CFrameWnd)

BEGIN_MESSAGE_MAP(CPersistentFrame, CFrameWnd)
	//{{AFX_MSG_MAP(CPersistentFrame)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

//////////////////////////////////////////////////////////////////////////
CPersistentFrame::CPersistentFrame() :
	m_profileHeading("Window size"), m_profileRect("Rect"),
	m_profileIcon("icon"), m_profileMax("max"),
	m_profileTool("tool"), m_profileStatus("status")
{
	m_bFirstTime = TRUE;

}

//////////////////////////////////////////////////////////////////////////
CPersistentFrame::~CPersistentFrame()
{
}

//////////////////////////////////////////////////////////////////////////
void CPersistentFrame::OnDestroy()
{
	CString text, temp;
	CWnd* pBar;
	BOOL bIconic, bMaximized;

	WINDOWPLACEMENT wndpl;
	wndpl.length = sizeof(WINDOWPLACEMENT);
	// gets current window position and iconized/maximized status
	BOOL bRet = GetWindowPlacement(&wndpl);
    if(wndpl.showCmd == SW_SHOWNORMAL) {
    	bIconic = FALSE;
    	bMaximized = FALSE;
    }
    else if(wndpl.showCmd == SW_SHOWMAXIMIZED) {
    	bIconic = FALSE;
    	bMaximized = TRUE;
    } 
    else if(wndpl.showCmd == SW_SHOWMINIMIZED) {
   		bIconic = TRUE;
    	if(wndpl.flags) {
    		bMaximized = TRUE;
    	}
    	else {
    		bMaximized = FALSE;
    	}
	}
	wsprintf(text.GetBuffer(20), "%04d %04d %04d %04d",
		wndpl.rcNormalPosition.left, wndpl.rcNormalPosition.top,
		wndpl.rcNormalPosition.right, wndpl.rcNormalPosition.bottom);

	text.ReleaseBuffer();
	AfxGetApp()->WriteProfileString(m_profileHeading, m_profileRect, text);
	AfxGetApp()->WriteProfileInt(m_profileHeading, m_profileIcon, bIconic);
	AfxGetApp()->WriteProfileInt(m_profileHeading, m_profileMax, bMaximized);
	if (pBar = GetDescendantWindow(AFX_IDW_TOOLBAR)) {
		AfxGetApp()->WriteProfileInt(m_profileHeading, m_profileTool,
			(pBar->GetStyle() & WS_VISIBLE) != 0L);
	}
	if (pBar = GetDescendantWindow(AFX_IDW_STATUS_BAR)) {
		AfxGetApp()->WriteProfileInt(m_profileHeading, m_profileStatus,
			(pBar->GetStyle() & WS_VISIBLE) != 0L);
	}
	CFrameWnd::OnDestroy();
}

//////////////////////////////////////////////////////////////////////////
void CPersistentFrame::ActivateFrame(int nCmdShow)
{
	CWnd* pBar;
	CString text;
	BOOL bIconic, bMaximized, bTool, bStatus;
	UINT flags;
	WINDOWPLACEMENT wndpl;
	CRect rect;
 
	if(m_bFirstTime) {
		m_bFirstTime = FALSE;
		text = AfxGetApp()->GetProfileString(m_profileHeading, m_profileRect);
		if(!text.IsEmpty()) {
			// can't use sscanf in a DLL
			rect.left = atoi((const char*) text);
			rect.top = atoi((const char*) text + 5);
			rect.right = atoi((const char*) text + 10);
			rect.bottom = atoi((const char*) text + 15);
		}
		else {
			rect = rectDefault;
		}
	
		bIconic = AfxGetApp()->GetProfileInt(m_profileHeading, m_profileIcon, 0);
		bMaximized = AfxGetApp()->GetProfileInt(m_profileHeading, m_profileMax, 0);
	
		if(bIconic) {
			nCmdShow = SW_SHOWMINNOACTIVE;
			if(bMaximized) {
				flags = WPF_RESTORETOMAXIMIZED;
			}
		}
		else {
			if(bMaximized) {
				nCmdShow = SW_SHOWMAXIMIZED;
				flags = WPF_RESTORETOMAXIMIZED;
			}
			else {
				nCmdShow = SW_NORMAL;
				flags = 0;
			}
		}
		wndpl.length = sizeof(WINDOWPLACEMENT);
		wndpl.showCmd = nCmdShow;
		wndpl.flags = flags;
		wndpl.ptMinPosition = CPoint(0, 0);
		wndpl.ptMaxPosition = CPoint(-::GetSystemMetrics(SM_CXBORDER),
					-::GetSystemMetrics(SM_CYBORDER));
		wndpl.rcNormalPosition = rect;

		bTool = AfxGetApp()->GetProfileInt(m_profileHeading, m_profileTool, 1);
		if (pBar = GetDescendantWindow(AFX_IDW_TOOLBAR)) {
			pBar->ShowWindow(bTool);
		}
		bStatus = AfxGetApp()->GetProfileInt(m_profileHeading, m_profileStatus, 1);
		if (pBar = GetDescendantWindow(AFX_IDW_STATUS_BAR)) {
			pBar->ShowWindow(bStatus);
		}
		// sets window's position and iconized/maximized status
		BOOL bRet = SetWindowPlacement(&wndpl);
	}
	CFrameWnd::ActivateFrame(nCmdShow);
}