C / C++ / MFC

how to track that no event has occured on a win32 SDI applications window

31-Aug-07 1:48

And see A Study of BIOS Interrupts as used by Microsoft Windows 2000.[^]

Dhiraj kumar Saini30-Aug-07 23:51

Re: how to track that no event has occured on a win32 SDI applications window

30-Aug-07 23:51

I am working on a win32 SDI application where i want to know if no event has occured or fired on a window a password dialog should be fired. I want to know how to track that no event has occured on the window.

Thanks in advance.

Dhiraj

Dhiraj Kumar Saini

chandu00431-Aug-07 0:02

chandu004

31-Aug-07 0:02

you mean you want to make something like a screen saver?
means, if any body does not do anything on the application for some time (say 10 mins) do you want to lock it by displaying the password screen.

Re: how to track that no event has occured on a win32 SDI applications window

Dhiraj kumar Saini31-Aug-07 0:18

Re: how to track that no event has occured on a win32 SDI applications window

31-Aug-07 0:18

yes is anybody does not do with the application for sometime it should be locked and requires password just like a screen saver.

chandu00431-Aug-07 0:26

chandu004

31-Aug-07 0:26

thats very simple.
take a global variable say timeout=0;
initiate a timer in the main view, which gets invoked once in 1 second.
inside the timer,
{
increment the timeout by one
if(timeout==60)//say 60 seconds
{
show the password screen.
}
}

and in all the other events like opening a dialog, closing a dialog,
doing some frequent operations,
reset the timeout flag to zero.
i am sure this will solve your problem.

Re: how to track that no event has occured on a win32 SDI applications window

Nishad S31-Aug-07 0:56

Nishad S

31-Aug-07 0:56

Dhiraj kumar Saini wrote:
if no event has occured or fired on a window

You mean events like mouse click, key strokes, etc., right?

- NS -

Re: how to track that no event has occured on a win32 SDI applications window

Dhiraj kumar Saini31-Aug-07 1:49

Re: how to track that no event has occured on a win32 SDI applications window

31-Aug-07 1:49

yes u right i want functionality like screen saver

Nishad S31-Aug-07 2:06

Nishad S

31-Aug-07 2:06

Since it is a Win32 Aplication (No MFC), there will be a message loop.
Like...

while( GetMessage( &msg, ....<br />
{<br />
TranslateMsg...<br />
DisapatchMsg...<br />
}

You have to modify it like...

<br />
SetTimer( IDT_LOCK, LOCK_TIME, 0 );<br />
while( GetMessage( &msg, ....<br />
{<br />
switch( msg.message )<br />
{<br />
case WM_LBUTTONDOWN:<br />
case WM_RBUTTONDOWN:<br />
case WM_KEYDOWN:<br />
SetTimer( IDT_LOCK, LOCK_TIME, 0 );<br />
break;<br />
}<br />
TranslateMsg...<br />
DisapatchMsg...<br />
}

And handle the WM_TIMER in the windowproc, like...

case WM_TIMER:<br />
switch( wParam )<br />
{<br />
case IDT_LOCK:<br />
KillTimer(IDT_LOCK);<br />
DialogBox( ...,IDD_PASSWORD,...<br />
//Do your code...<br />
SetTimer( IDT_LOCK, LOCK_TIME, 0 );<br />
break;<br />
}

Hope you got the idea... Smile | :)

- NS -

Re: how to track that no event has occured on a win32 SDI applications window

Hamid_RT31-Aug-07 1:44

Re: how to track that no event has occured on a win32 SDI applications window

31-Aug-07 1:44

Do you want to show a dialog to user when he want to use of your program?

Dhiraj kumar Saini31-Aug-07 1:50

Re: how to track that no event has occured on a win32 SDI applications window

31-Aug-07 1:50

yes a dialog for entering password

David Crow31-Aug-07 3:32

How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 3:32

Dhiraj kumar Saini wrote:
...i want to know if no event has occured or fired on...

For idle detection, use GetLastInputInfo().

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

shir_k30-Aug-07 23:38

Re: How to display data continuously in edit box & How to avoid flickering in edit box

30-Aug-07 23:38

Hi,

Am getting data continuously from the serial port(COM), i want to display the data in an multiline edit box,How to do it?
I tried one method as below but edit box flickers
void CDialog::ReadSerialData(CString sIn)
{

sIn.Replace("\r","\r\n");
m_StrCmdResp += sIn;
int nLineCount = m_CtrlCmdResp.GetLineCount();
m_CtrlCmdResp.LineScroll(nLineCount+1);
m_CtrlCmdResp.SetWindowText(m_StrCmdResp);
nLineCount = m_CtrlCmdResp.GetLineCount();
m_CtrlCmdResp.LineScroll(nLineCount+1);
if(nLineCount > MAX_RUN_BUFFERSIZE)
{
m_StrCmdResp.Delete(0,REMOVE_CHAR);
while(!(m_StrCmdResp.Find("\r\n")))
{
m_StrCmdResp.Delete(0,1);
};

}
m_StrCmdResp.FreeExtra();
}
Can we use edit box for this type of data displaying

Thanks in advance

chandu00430-Aug-07 23:43

chandu004

30-Aug-07 23:43

use listbox or may be list control instead.
even i had this problem and list control solved my problem.

Re: How to display data continuously in edit box & How to avoid flickering in edit box

Iain Clarke, Warrior Programmer30-Aug-07 23:44

Iain Clarke, Warrior Programmer

30-Aug-07 23:44

If you are shoing data coming back from somewhere, then an edit box is probably the wrong control to use.

I use CPPDumpCtrl - version 1.2[^] for this purpose, as you can see the data in different representations. As it is double buffered, flickering will be very low.

Sometimes, you're just using the square peg, and you have a round hole...

Iain.

Re: How to display data continuously in edit box & How to avoid flickering in edit box

David Crow31-Aug-07 3:37

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 3:37

Iain Clarke wrote:
Sometimes, you're just using the square peg, and you have a round hole...

Well, as long as the length of the opposite corners is the same as the hole's diameter, it should still work.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Iain Clarke, Warrior Programmer31-Aug-07 3:50

Iain Clarke, Warrior Programmer

31-Aug-07 3:50

But then the wumpuss could crawl in the circle sections around the edge, and then where will you be?

Iain.

Re: How to display data continuously in edit box & How to avoid flickering in edit box

Hamid_RT31-Aug-07 1:50

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 1:50

Good choice is CListBox or CListCtrl or even ComboBox but Editbox no.

shir_k31-Aug-07 4:26

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 4:26

Thanks for the help.I will try with CCtrlList.

Hamid_RT31-Aug-07 19:33

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 19:33

You're welcome.

David Crow31-Aug-07 3:34

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 3:34

shir_k wrote:
Am getting data continuously from the serial port(COM), i want to display the data in an multiline edit box,How to do it?

Extract the data from a serial port, or update an edit control?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

shir_k31-Aug-07 4:29

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 4:29

Updating in the edit control

David Crow31-Aug-07 4:36

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 4:36

See here. Most of the time, SetWindowText() can be used.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

shir_k31-Aug-07 19:28

Re: How to display data continuously in edit box & How to avoid flickering in edit box

31-Aug-07 19:28

Hi DavidCrow,

Am using SetWindowText(), but there is flickering

Thanks

David Crow1-Sep-07 5:47