How Blinking Text IN MFC on CDC

http://www.codeproject.com/miscctrl/cfctrl.asp?df=100&forumid=565&exp=0&select=703134

https://www.experts-exchange.com/questions/21834593/String-Manipulation.html

Add a message handler for the WM_TIMER message (class wizard)
Launch the timer in OnInitDialog

#define ID_MY_BLINKER (WM_USER+1)

BOOL CMyClass::OnInitiDialog()
{
   /* ...*/
   SetTimer(ID_MY_BLINKER, 1000, NULL);  // blink every 1000 ms
}

void CMyClass::OnTimer(UINT nIDEvent)
{
             if (nIDEvent == ID_MY_BLINKER)
             {
                  static bool IsOn = true;
                  IsOn ^= true;              // toggle true/false;

                  DCD *dc = GetDC();

                  if (IsOn´)
                      dc->TextOut("hello", ...
                   else
                      dc->TextOut("world", ...
                 
                    ReleaseDC(dc);
               }
               else
                   CDialog::OnTimer(nIDEvent)
}

Excuse any syntax errors - cannot compile on this machine
Cheers Sebastian

i got solution on my problem
first define two timer
#define IDT_WINDOW_TIMER_1 100
#define IDT_WINDOW_TIMER_2 101

in paint events add following lines
void CChildView::OnPaint()
{
CPaintDC dc(this);

SetTimer(IDT_WINDOW_TIMER_1, 50, NULL);      
}
add following code to ontimer

void CChildView::OnTimer(UINT nIDEvent)
 {
CClientDC dc(this);

 switch(nIDEvent)
 {

 case  IDT_WINDOW_TIMER_1:

      
      str="Yogesh Shrikhande ";
      
            dc.TextOut ( 200, 100, str) ;
            
KillTimer(IDT_WINDOW_TIMER_1);
       SetTimer(IDT_WINDOW_TIMER_2, 50, NULL);      



break;
case      IDT_WINDOW_TIMER_2:

int l;
l=str.GetLength();       
s.Format("%d",l) ;
str.Empty();
for (int i=0;i<=l*2;i++)
str=str+" ";
dc.TextOut ( 200, 100,str) ;
KillTimer(IDT_WINDOW_TIMER_2);
SetTimer(IDT_WINDOW_TIMER_1, 100, NULL);

 }
CWnd::OnTimer(nIDEvent);
 }

in this text are blinking on disp device

That's my code .. only a bit longer ;-)
You should call ReleaseDC() after using the dc.
Maybe it's better to set the timer in CWnd::OnCreate() - as it is, it will restart on every WM_PAINT notification

Cheers,
Sebastian

Hi yogesh28577

Do you have any more questions on the code ?
and did you think of the ReleaseDC() ?

If you have no more comments you should finalize the question.

Cheers,
Sebastian

hi bastibartel
plz tell me how to use ReleaseDc()
in my program

i have also another method with out using timer but after some time it gives error


// ChildView.cpp : implementation of the CChildView class
//

#include "stdafx.h"
#include "Rotating.h"
#include "ChildView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

CString str;

/////////////////////////////////////////////////////////////////////////////
// CChildView

CChildView::CChildView()
{
}

CChildView::~CChildView()
{
}


BEGIN_MESSAGE_MAP(CChildView,CWnd )
      //{{AFX_MSG_MAP(CChildView)
      ON_WM_PAINT()      
      ON_WM_CREATE()
      //}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CChildView message handlers



void CChildView::OnPaint()
{
CPaintDC dc(this);

disp();

}

void CChildView::disp()
 {

CClientDC dc(this);

str="Yogesh Shrikhande";
dc.TextOut ( 200, 100, str) ;
time1(.1);

disp1();

}
void CChildView::disp1()
{
CString s;
CClientDC dc(this);
int l;
l=str.GetLength();       
s.Format("%d",l) ;
str.Empty();
for (int i=0;i<=l*2;i++)
str=str+" ";
dc.TextOut ( 200, 100,str) ;
time1(.1);
disp();

 }
int CChildView::time1(int t)
{


  long initial,final;
  long ltime;

  initial=time(&ltime);
  final=initial+t;

  while (time(&ltime) < final);
  return 1;

}

Hello yogesh28577 ,

Do have any more questions ?.

Cheers,
Sebastia

plz give me yahoo messager id i want to chat with u

Sorry I don't have an account there ...
Go ahead, ask me here at EE :-)

Cheers,
Sebastian

ok