大学IT网 - 最懂大学生的IT学习网站! QQ资料交流群:367606806
当前位置:大学IT网 > C++技巧 > 怎样实现动画背景旗帜

怎样实现动画背景旗帜

关键词:旗帜背景动画  阅读(434) 赞(13)

[摘要]本文是对怎样实现动画背景旗帜的讲解,对学习C++编程技术有所帮助,与大家分享。

以下代码是关于用类CmdiMainClient来显示动画背景旗帜的一个例子。原理是很复杂的,我们只需求一系列延续的位图,并且让它延续显示。在这个例子中你可以用鼠标的右键来末尾/中止这个动画,假定点左键的话,就可以显示一个子窗口,来坚持动画是持续。为了你的方便,你可以把代码直接从阅读器中拷贝下去,并且插到你的代码中就行了。以下是代码:
#include "stdafx.h"
#include "banner.h"
#include "mainfrm.h"

#include "resource.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMdiMainClient

CMdiMainClient::CMdiMainClient()
: m_sizeClient(0, 0)

{
VERIFY (m_bmpBackGround.LoadBitmap(IDB_BCKGRD));
ASSERT (m_bmpBackGround.GetSafeHandle());

VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP0));
ASSERT (m_bmpBackGround2.GetSafeHandle());

BmpLoaded = 1;
StopRotation = FALSE;
}

CMdiMainClient::~CMdiMainClient()
{
if(m_bmpBackGround.GetSafeHandle())
m_bmpBackGround.DeleteObject();

if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
}


BEGIN_MESSAGE_MAP(CMdiMainClient, CWnd)
//{{AFX_MSG_MAP(CMdiMainClient)
// NOTE - the ClassWizard will add and remove mapping macros here.
ON_WM_TIMER()
ON_WM_ERASEBKGND()
ON_WM_RBUTTONDOWN()
ON_WM_LBUTTONDOWN()
ON_WM_SIZE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CMdiMainClient message handlers
BOOL CMdiMainClient::OnEraseBkgnd(CDC* pDC)
{
// Erase only the area needed
CRect rect;
GetClientRect(&rect) ;

SetTimer(0,300,NULL);

// Place the bitmap
BITMAP bm ;
CDC dcMem ;

BITMAP bm2 ;
CDC dcMem2;


VERIFY(m_bmpBackGround.GetObject(sizeof(bm), (LPVOID)&bm));
dcMem.CreateCompatibleDC(NULL);
CBitmap* pbmpOld = (CBitmap*)dcMem.SelectObject(&m_bmpBackGround);
ASSERT(pbmpOld) ;
// Display red background
pDC->StretchBlt(0, 0, rect.right, rect.bottom, &dcMem, 0,
0, bm.bmWidth, bm.bmHeight,SRCCOPY);

VERIFY(m_bmpBackGround2.GetObject(sizeof(bm2), (LPVOID)&bm2));
dcMem2.CreateCompatibleDC(NULL);
dcMem2.SelectObject(&m_bmpBackGround2);
// Display picture background
pDC->StretchBlt(200,100,400, 200, &dcMem2, 0,0, bm2.bmWidth, bm2.bmHeight,
SRCCOPY);

// Display Instructions
pDC->SetBkColor(RGB(255,0,0));
pDC->SetTextColor(RGB(192,192,192));
pDC->TextOut(480, 500, "Mouse Right Click to Stop/Start Special Effects");
pDC->TextOut(480, 515, "Mouse Left-Click to Show Child Window");

// CleanUp
dcMem.SelectObject(pbmpOld) ;

return TRUE;
}

////////////////////////////////////////////////////////////////////
//
void CMdiMainClient::OnSize(UINT nType, int cx, int cy)
{
Default() ;
// if the app is just starting up, save the window
// dimensions and get out

if ((m_sizeClient.cx == 0) && (m_sizeClient.cy==0))
{
m_sizeClient.cx = cx;
m_sizeClient.cy = cy;

return ;
}

// if the size hasn't changed, break and pass to default

if ((m_sizeClient.cx == cx) && ( m_sizeClient.cy == cy))
{
return ;
}

// window size has changed so save new dimensions and force
// entire background to redraw, including icon backgrounds

m_sizeClient.cx = cx;
m_sizeClient.cy = cy;

RedrawWindow(NULL, NULL,
RDW_INVALIDATE|RDW_ERASE|RDW_ERASENOW|RDW_ALLCHILDREN);

return ;
}

void CMdiMainClient::OnTimer(UINT nIDEvent)
{
DisplayNextLogoFrame();
CWnd::OnTimer(nIDEvent);
}


void CMdiMainClient::DisplayNextLogoFrame()
{
CRect rect;
GetClientRect(&rect) ;

BITMAP bm2 ;
CDC dcMem2;

CDC *pDC = GetDC();

if (!StopRotation)
{
// Select next logo frame to be displayed
switch (BmpLoaded)
{
case 1: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP1));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 2: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP2));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 3: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP3));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 4: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP4));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 5: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP5));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 6: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP6));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 7: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP7));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 8: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP8));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
case 9: if(m_bmpBackGround2.GetSafeHandle())
m_bmpBackGround2.DeleteObject();
VERIFY (m_bmpBackGround2.LoadBitmap(IDB_BITMAP9));
ASSERT (m_bmpBackGround2.GetSafeHandle());
break;
}
// Change Bitmap index
if (BmpLoaded == 9)
BmpLoaded = 0;
else
BmpLoaded++;
}

VERIFY(m_bmpBackGround2.GetObject(sizeof(bm2), (LPVOID)&bm2));
dcMem2.CreateCompatibleDC(NULL);
dcMem2.SelectObject(&m_bmpBackGround2);
pDC->StretchBlt(200,100,400, 200, &dcMem2, 0,0, bm2.bmWidth, bm2.bmHeight,
SRCCOPY);

ReleaseDC(pDC);
}

void CMdiMainClient::OnRButtonDown(UINT nFlags, CPoint point)
{
if (StopRotation)
StopRotation = FALSE;
else
StopRotation = TRUE;

CWnd::OnRButtonDown(nFlags, point);
}

void CMdiMainClient::OnLButtonDown(UINT nFlags, CPoint point)
{
m_Hide_Logo = TRUE;
KillTimer(0);

// Display Application
((CBannerApp*)AfxGetApp())->pDocTemplate->OpenDocumentFile(NULL);

CWnd::OnLButtonDown(nFlags, point);
}

// MdiMainClient.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CMdiMainClient window

extern BOOL m_Hide_Logo;

class CMdiMainClient : public CWnd
{
// Construction
public:
CMdiMainClient();

// Attributes
protected:
CBitmap m_bmpBackGround2;
CBitmap m_bmpBackGround;

int BmpLoaded;
public:
BOOL StopRotation;
CSize m_sizeClient;

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMdiMainClient)
//}}AFX_VIRTUAL

// Implementation
public:
void Display_Blank_Bitmap();
void DisplayNextLogoFrame();
virtual ~CMdiMainClient();
// Generated message map functions
protected:
//{{AFX_MSG(CMdiMainClient)
// NOTE - the ClassWizard will add and remove member functions here.
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
afx_msg void OnSize(UINT nType, int cx, int cy);
afx_msg void OnTimer(UINT nIDEvent);
afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};



相关评论