mainfrm.cpp

这是MFC经典问答书的光盘内容

// MainFrm.cpp : implementation of the CMainFrame class
//

#include "stdafx.h"
#include "ProgressBar.h"

#include "MainFrm.h"

#include <afxpriv.h>	// for WM_SETMESSAGESTRING message

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMainFrame

IMPLEMENT_DYNAMIC(CMainFrame, CMDIFrameWnd)

BEGIN_MESSAGE_MAP(CMainFrame, CMDIFrameWnd)
	//{{AFX_MSG_MAP(CMainFrame)
	ON_WM_CREATE()
	ON_COMMAND(ID_VIEW_SHAPES_TOOLBAR, OnViewShapesToolbar)
	ON_UPDATE_COMMAND_UI(ID_VIEW_SHAPES_TOOLBAR, OnUpdateViewShapesToolbar)
	ON_COMMAND(ID_DEMO_LONG_TASK_1, OnDemoLongTask1)
	ON_COMMAND(ID_DEMO_LONG_TASK_2, OnDemoLongTask2)
	ON_COMMAND(ID_DEMO_LONG_TASK_3, OnDemoLongTask3)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

static UINT indicators[] =
{
	ID_SEPARATOR,           // status line indicator
	ID_INDICATOR_PROGRESS,
	ID_INDICATOR_CAPS,
	ID_INDICATOR_NUM,
	ID_INDICATOR_SCRL,
};

///////////////////////////////////////////////////////////
// EkIsBarVisible

BOOL EkIsBarVisible( CControlBar* pBar )
{
	ASSERT_VALID( pBar );

	return ( ( pBar->GetStyle() & WS_VISIBLE ) != 0 );
}

///////////////////////////////////////////////////////////
// EkDockBarNextTo

void EkDockBarNextTo(	CControlBar* pNewBar,
						CControlBar* pDockedBar,
						UINT nDockBarID = AFX_IDW_DOCKBAR_TOP )
{
	ASSERT_VALID( pDockedBar );
	ASSERT_VALID( pNewBar );

	// 1 - Find the frame where we will dock
	CFrameWnd* pFrame = pDockedBar->GetDockingFrame();

	// 2 - Force MFC to compute the positions
	// of the docked control bar(s)
	pFrame->RecalcLayout();

	// 3 - Compute rectangle of already "docked" bar
	CRect rect;
	pDockedBar->GetWindowRect( &rect );

	// 4 - Offset the rectangle slightly to the bottom right
	// so that the new bar will dock either to the right or
	// to the bottom of the existing bar (depending on the
	// side where this last bar is already docked)
	rect.OffsetRect(1,1);

	// 5 - Dock new bar to specified position
	pFrame->DockControlBar( pNewBar, nDockBarID, &rect );
}

/////////////////////////////////////////////////////////////////////////////
// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
	// TODO: add member initialization code here
	
}

CMainFrame::~CMainFrame()
{
}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CMDIFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	if (!m_wndToolBar.Create(this) ||
		!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
	{
		TRACE0("Failed to create standard toolbar\n");
		return -1;      // fail to create
	}

	if (!m_wndTBshapes.Create(this, WS_CHILD | WS_VISIBLE | CBRS_TOP, IDR_SHAPES) ||
		!m_wndTBshapes.LoadToolBar(IDR_SHAPES))
	{
		TRACE0("Failed to create shapes toolbar\n");
		return -1;      // fail to create
	}

	if (!m_wndTBdemo.Create(this, WS_CHILD | WS_VISIBLE | CBRS_TOP, IDR_DEMO_TOOLBAR) ||
		!m_wndTBdemo.LoadToolBar(IDR_DEMO_TOOLBAR))
	{
		TRACE0("Failed to create demo toolbar\n");
		return -1;      // fail to create
	}

	if (!m_wndStatusBar.Create(this) ||
		!m_wndStatusBar.SetIndicators(indicators,
		  sizeof(indicators)/sizeof(UINT)))
	{
		TRACE0("Failed to create status bar\n");
		return -1;      // fail to create
	}

	// Mainframe docking
	EnableDocking(CBRS_ALIGN_ANY);

	// Standard toolbar docking
	m_wndToolBar.SetBarStyle(m_wndToolBar.GetBarStyle() |
					CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
	m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
	DockControlBar(&m_wndToolBar);

	// Shapes toolbar docking
	m_wndTBshapes.SetBarStyle(m_wndTBshapes.GetBarStyle() |
					CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
	m_wndTBshapes.EnableDocking(CBRS_ALIGN_ANY);
	EkDockBarNextTo( &m_wndTBshapes, &m_wndToolBar, AFX_IDW_DOCKBAR_TOP );
	m_wndTBshapes.SetWindowText( CString( LPCSTR( IDR_SHAPES ) ) );

	// Demo toolbar docking
	m_wndTBdemo.SetBarStyle(m_wndTBdemo.GetBarStyle() |
					CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
	m_wndTBdemo.EnableDocking(CBRS_ALIGN_ANY);
	DockControlBar(&m_wndTBdemo, AFX_IDW_DOCKBAR_LEFT);

	return 0;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CMDIFrameWnd::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMainFrame diagnostics

#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
	CMDIFrameWnd::AssertValid();
}

void CMainFrame::Dump(CDumpContext& dc) const
{
	CMDIFrameWnd::Dump(dc);
}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers

void CMainFrame::OnViewShapesToolbar() 
{
	ShowControlBar( &m_wndTBshapes, !EkIsBarVisible( &m_wndTBshapes ), FALSE );
}

void CMainFrame::OnUpdateViewShapesToolbar(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck( EkIsBarVisible( &m_wndTBshapes ) );	
}

///////////////////////////////////////////////////////////
// EkCreateProgressBar

BOOL EkCreateProgressBar(	CProgressCtrl* pProgressCtrl,
							CStatusBar* pStatusBar,
							LPCTSTR szMessage = NULL,
							int nPaneIndex = 0,
							int cxMargin = 10,
							int cxMaxWidth = -1,
							UINT nIDControl = 1 )
{
	ASSERT_VALID( pProgressCtrl );
	ASSERT_VALID( pStatusBar );

	// 1 - Calculate destination rectangle for progress control
    CRect rc;
    pStatusBar->GetItemRect( nPaneIndex, &rc );

	// 2 - Define progress bar horizontal offset
	if( szMessage != NULL )
	{
		// Compute message text extent
		CClientDC dc( pStatusBar );
		CFont* pFont = pStatusBar->GetFont();
		CFont* pOldFont = dc.SelectObject( pFont );
		CSize sizeText = dc.GetTextExtent( szMessage );
		dc.SelectObject( pOldFont );

		rc.left += sizeText.cx + cxMargin;
	}

	// 3 - Compute progress bar width
	if( cxMaxWidth != -1 )
	{
		rc.right = rc.left + min( cxMaxWidth, rc.Width() );
	}

	// 4 - Display message text
	pStatusBar->SetPaneText( nPaneIndex, szMessage );
	pStatusBar->RedrawWindow();

	// 5 - Create progress control
    return pProgressCtrl->Create(	WS_CHILD | WS_VISIBLE,
									rc, pStatusBar, nIDControl );
}

void CMainFrame::OnDemoLongTask1() 
{
	// 1 - Create "progress bar"
	// (default options)
	CProgressCtrl wndProgress;
	EkCreateProgressBar(	&wndProgress, &m_wndStatusBar,
							_T( "Executing a long task (1), press Esc to cancel..." ) );
    
	// 2 - Initialize progress control range and step size
    wndProgress.SetRange( 0, 100 );
    wndProgress.SetStep( 1 );

	// 3 - Here is where you would perform your long task and regularly
	// call wndProgress.StepIt() to update the progress control.

	// For this demonstration, we simulate the long task
    // with a for loop and the Sleep() function.
	srand( (unsigned)time( NULL ) );	// seed random number generator
    for( int i = 0; i < 100; ++i )
    {
		// 4 - Test for "Esc" key
		if( ::GetAsyncKeyState( VK_ESCAPE ) < 0 )
		{
			break;
		}

		int nSleepTime = MulDiv( 100, rand(), RAND_MAX );
		Sleep( nSleepTime );

		// 5 - Update progress control
		wndProgress.StepIt();
    }

	// 6 - Ensures that idle message is displayed again
	PostMessage( WM_SETMESSAGESTRING, (WPARAM) AFX_IDS_IDLEMESSAGE, 0L );
}

void CMainFrame::OnDemoLongTask2() 
{
	// 1 - Create "progress bar"
	// (limit progress bar width to 200 pixels)
	CProgressCtrl wndProgress;
	EkCreateProgressBar(	&wndProgress, &m_wndStatusBar,
							_T( "Executing a long task (2), press Esc to cancel..." ),
							0, 10, 200 );
    
	// 2 - Initialize progress control range and step size
    wndProgress.SetRange( 0, 100 );
    wndProgress.SetStep( 1 );

	// 3 - Here is where you would perform your long task and regularly
	// call wndProgress.StepIt() to update the progress control.

	// For this demonstration, we simulate the long task
    // with a for loop and the Sleep() function.
	srand( (unsigned)time( NULL ) );	// seed random number generator
    for( int i = 0; i < 100; ++i )
    {
		// 4 - Test for "Esc" key
		if( ::GetAsyncKeyState( VK_ESCAPE ) < 0 )
		{
			break;
		}

		int nSleepTime = MulDiv( 100, rand(), RAND_MAX );
		Sleep( nSleepTime );

		// 5 - Update progress control
		wndProgress.StepIt();
    }

	// 6 - Ensures that idle message is displayed again
	PostMessage( WM_SETMESSAGESTRING, (WPARAM) AFX_IDS_IDLEMESSAGE, 0L );
}

void CMainFrame::OnDemoLongTask3() 
{
	// 1 - Create "progress bar"
	// (in pane 1, without message text)
	CProgressCtrl wndProgress;
	EkCreateProgressBar(	&wndProgress, &m_wndStatusBar,
							NULL, 1 );
    
	// 2 - Initialize progress control range and step size
    wndProgress.SetRange( 0, 100 );
    wndProgress.SetStep( 1 );

	// 3 - Here is where you would perform your long task and regularly
	// call wndProgress.StepIt() to update the progress control.

	// For this demonstration, we simulate the long task
    // with a for loop and the Sleep() function.
	m_wndStatusBar.SetWindowText( _T( "Executing a long task (3), press Esc to cancel..." ) );
	m_wndStatusBar.RedrawWindow();

	srand( (unsigned)time( NULL ) );	// seed random number generator
    for( int i = 0; i < 100; ++i )
    {
		// 4 - Test for "Esc" key
		if( ::GetAsyncKeyState( VK_ESCAPE ) < 0 )
		{
			break;
		}

		int nSleepTime = MulDiv( 100, rand(), RAND_MAX );
		Sleep( nSleepTime );

		// 5 - Update progress control
		wndProgress.StepIt();
    }

	// 6 - Ensures that idle message is displayed again
	PostMessage( WM_SETMESSAGESTRING, (WPARAM) AFX_IDS_IDLEMESSAGE, 0L );

	// 7 - Restore indicator string
	m_wndStatusBar.SetPaneText( 1, CString( (LPCSTR) ID_INDICATOR_PROGRESS ) );
}