Positioning Thumb - C / C++ / MFC Discussion Boards

wanglei19805-Jun-06 21:12

wanglei1980

5-Jun-06 21:12

As we know quick launch in task bar is a very usefull component to launch app.
i wanna know much more about it.It works as if they create shortcut in it.
can you tell me the truth of how it works.
By the way, if i want to display the shortcut to another app in my own window,
how can i implement it.

Re: something about quick launch

ThatsAlok6-Jun-06 0:59

ThatsAlok

6-Jun-06 0:59

wanglei1980 wrote:
By the way, if i want to display the shortcut to another app in my own window,

They simply Execute the EXE on Click...

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

How to catch mouse move over ListView header

Cool Ju5-Jun-06 20:59

Cool Ju

5-Jun-06 20:59

Hi,

Is there any way to catch the mouse move over listview header? I am able to handle click and dblclick but I did'nt find any message for mouse move over listview header.

Adios,
Cool Ju Cool | :cool:

Dream Ur Destiny

Re: How to catch mouse move over ListView header

Naveen5-Jun-06 21:29

Naveen

5-Jun-06 21:29

Subclass the headerctrl and then handle the mouse move

nave

Re: How to catch mouse move over ListView header

-tusk-24-Jun-11 16:25

-tusk-

24-Jun-11 16:25

OMG!!
Years later, I found this by chance and this is exactly what I needed !
Tahnks Wink | ;)

List Control How to add subcolumns within column

leelac5-Jun-06 20:23

leelac

5-Jun-06 20:23

Hi,
I have a list control with 4 columns. One of the columns should have 2 subcolumns within it. Could anybody guide me how to go about it?

Thanks!

Re: List Control How to add subcolumns within column

khan++5-Jun-06 20:43

khan++

5-Jun-06 20:43

I don't think there is an easy way to stop the header bar from showing the split without it being owner-drawn.
1- You could always reduce the width of the columns, so it looks like a sub-column.
2- You could also insert the text using some spaces between the two sub-column entries in the same column.

this is this.

Positioning Thumb

Sarath C5-Jun-06 20:20

Sarath C

5-Jun-06 20:20

Hi all,
I have custom scrollbar. I need to track the thumb as windows tracks the thumb of a scrollbar. My logic is not working very well. the thumb is not reaching the bottom Frown | :(

Do u know how to calculate physical position of the thumb accordign to the logical position(scroll range).

Sa^Rath.

"Don't Do Different things... Do Things Differently..."

Farpoint Spread 6.0

chethu6655-Jun-06 20:19

chethu665

5-Jun-06 20:19

hi
in spread how to get the position of cursor like the cursor is in 4 chars from start or 5 chars from start . D'Oh! | :doh:

"Men never do evil so completely and cheerfully as when they do it from religious conviction"
-Pascal

Displaying finish button on PropertySheet

Abhi Lahare5-Jun-06 19:30

Abhi Lahare

5-Jun-06 19:30

Hi
I want to display finish button on Property page along with next and back button. For this i have changed code according to MS link

http://support.microsoft.com/kb/q143210/[^]
but finish button is not displayed.How does MFC internally handles calls to
ID_WIZFINISH and ID_WIZNEXT buttons?
Thanks in advance
Abhi Lahare.

Re: Displaying finish button on PropertySheet

Naveen5-Jun-06 19:36

Naveen

5-Jun-06 19:36

to display the finish button overide the OnSetActive function of that page and put the following code in it

CPropertySheet* psheet = (CPropertySheet*) GetParent();
psheet->SetWizardButtons( PSWIZB_FINISH );

nave

Re: Displaying finish button on PropertySheet

Abhi Lahare5-Jun-06 20:43

Abhi Lahare

5-Jun-06 20:43

hi Naveen,
psheet->SetWizardButtons( PSWIZB_FINISH ) will set the FINSIH button on property sheet and will hide NEXT button,

I want all the buttons Back,Next,Finish,Cancel all the time on all pages of wizard. expect the last page where there will be no Next button.
Also i want to override functionality of Finish Button.

Thanks in advance
Abhi Lahare

Re: Displaying finish button on PropertySheet

Naveen5-Jun-06 20:48

Naveen

5-Jun-06 20:48

did u try the following steps

1. Overide the OnSetActive() function in the class of last page
2. Put the following code in it

CPropertySheet* psheet = (CPropertySheet*) GetParent();<br />
psheet->SetWizardButtons(  PSWIZB_FINISH );

To overide the functionality of finish button overide the function OnWizardFinish()

nave

Re: Displaying finish button on PropertySheet

Amar Sutar5-Jun-06 23:36

Amar Sutar

5-Jun-06 23:36

...OnSetActive()
{
// TODO: Add your specialized code here and/or call the base class
CPropertySheet *pParent;
pParent = static_cast<cpropertysheet *=""> (GetParent());
pParent->SetWizardButtons(PSWIZB_BACK|PSWIZB_NEXT|PSWIZB_FINISH);
return CPropertyPage::OnSetActive();
}

Regards
Amar Smile | :)

Timer Vs Sleep

Sharath865-Jun-06 19:25

Sharath86

5-Jun-06 19:25

I need to replace Sleep(n) in my code by a timer (in a while loop or something).
Sleep is turning out to be very inaccurate with errors of upto 40 milliseconds.
can anyone please give me some easy to understand code to do this replacement.

Re: Timer Vs Sleep

khan++5-Jun-06 19:48

khan++

5-Jun-06 19:48

If you are using MFC, then it is a bit easier.
Set the timer using SetTimer().
Handle the WM_TIMER message, OnTimer() etc.
But this one is also not accurate. It skids slowly in one direction or the other until you have an error that is seconds long in a few hours.
The better timer available is the Multimedia timer.
Just look up WM_TIMER message and SetTimer() function, and you are on your way. Do all the processing in the OnTimer() function and without using any loop or Sleep().

this is this.

Re: Timer Vs Sleep

Cedric Moonen5-Jun-06 21:27

Cedric Moonen

5-Jun-06 21:27

You won't be able to have a precision under 10 or 15 msec (depends of the CPU load and other factors) because windows is not a real-time operating system. If you need to have such precision, you'll need to look for another OS.

Cédric Moonen
Software developer

Charting control

Re: Timer Vs Sleep

Viorel.5-Jun-06 21:32

Viorel.

5-Jun-06 21:32

I think you can try to replace Sleep with QueryPerformanceCounter.

The code can look like this. First, get the frequency of high-resolution performance counter; this can be done once in your program:

LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);

Then, when you need a delay, use the following approach:

int const delay_ms = 500; // the delay you need, in milliseconds

long long n = delay_ms * freq.QuadPart / 1000;

LARGE_INTEGER c;
QueryPerformanceCounter(&c);

long long const f = c.QuadPart + n;

do
{
   QueryPerformanceCounter(&c);
} while( c.QuadPart < f);

Hope this solution will meet your requirements.

Re: Timer Vs Sleep

ThatsAlok6-Jun-06 1:01

ThatsAlok

6-Jun-06 1:01

Sharath86 wrote:
can anyone please give me some easy to understand code to do this replacement.

try QueryPerformanceCounter

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Re: Timer Vs Sleep

Sharath866-Jun-06 3:02

Sharath86

6-Jun-06 3:02

I tried that and the error is worse than when i use Sleep.any other mechanisms like Timers or something. this is a DLL btw not in an MFC application...

Re: Timer Vs Sleep

ThatsAlok6-Jun-06 19:01

ThatsAlok

6-Jun-06 19:01

Sharath86 wrote:
btw not in an MFC application...

BTW the Way QueryPerformanceCounter and QueryPerformanceFrequency are Api not MFC Function!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Better Way

HakunaMatada5-Jun-06 19:18

HakunaMatada

5-Jun-06 19:18

Which is a better way to return values and why?

1)

int Test(int n)<br />
{<br />
	int nReturn = 0 ;<br />
<br />
	if( n == 0 )<br />
	{<br />
		nReturn = 0 ;<br />
	}<br />
	else if( n == 1 )<br />
	{<br />
		nReturn = 1 ;<br />
	}<br />
	else<br />
	{<br />
		nReturn = -1 ;<br />
	}<br />
<br />
	return nReturn ;<br />
}

int Test(int n)<br />
{<br />
	if( n == 0 )<br />
	{<br />
		return 0 ;<br />
	}<br />
	else if( n == 1 )<br />
	{<br />
		return 1 ;	<br />
	}<br />
<br />
	return -1<br />
}

---
With best regards,
A Manchester United Fan

The Genius of a true fool is that he can mess up a foolproof plan!

Re: Better Way [modified]

sunit55-Jun-06 19:47

sunit5

5-Jun-06 19:47

I prefer 2nd option Blush | :O

never say die

-- modified at 1:47 Tuesday 6th June, 2006

Re: Better Way

Laxman Auti5-Jun-06 19:57

Laxman Auti

5-Jun-06 19:57

TechyMaila wrote:
Which is a better way to return values and why?

I suggest another way

int Test(int n)
{
if(n==0 || n==1)
  return n;
return -1; 
}

Knock out 't' from can't,
You can if you think you can
Cool | :cool:

Re: Better Way

HakunaMatada5-Jun-06 20:08

HakunaMatada

5-Jun-06 20:08

Isn't it said that a good programming practice is to always return values at the end or rather just have one single return point? Confused | :confused:

---
With best regards,
A Manchester United Fan

The Genius of a true fool is that he can mess up a foolproof plan!

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