C / C++ / MFC Discussion Boards

Re: Ownerdraw Listbox

Hamid_RT3-Oct-07 2:00

Hamid_RT

3-Oct-07 2:00

A different question why you dont use of ListCtrl instead ListBox?

Re: Ownerdraw Listbox

Nishad S3-Oct-07 2:14

Nishad S

3-Oct-07 2:14

I like listbox because of its simplicity. But could you please point out the advantage of listctrl that made you to ask so?

- NS -

Re: Ownerdraw Listbox

Hamid_RT3-Oct-07 2:26

Hamid_RT

3-Oct-07 2:26

Instead my choice is Listctrl and ListBox is simple to use but its limited.

Re: Ownerdraw Listbox

Nishad S3-Oct-07 2:35

Nishad S

3-Oct-07 2:35

Hamid. wrote:
but its limited.

That's true... Smile | :)

- NS -

Re: Ownerdraw Listbox

Hamed Musavi3-Oct-07 2:45

Hamed Musavi

3-Oct-07 2:45

Hamid. wrote:
why you dont use of ListCtrl

Because all I need is a list of names.

CListCtrl has been designed to do more, like icons, different views(like report), good in-place edit, etc. and more flexibility cause more complexity, so one should spend a lot more time and write more codes to do the same work that could be easily done by a ListBox.

Now that I don't need those features, why should I go the hard way?

// "Life is very short and is very fragile also." Yanni
while (I'm_alive)
{
cout<<"I love programming.";
}

Re: Ownerdraw Listbox

David Crow3-Oct-07 3:29

David Crow

3-Oct-07 3:29

Hamed Mosavi wrote:
Now that I don't need those features, why should I go the hard way?

I agree. It was an odd suggestion.

"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

Re: Ownerdraw Listbox

Iain Clarke, Warrior Programmer3-Oct-07 4:45

Iain Clarke, Warrior Programmer

3-Oct-07 4:45

Your method seems fine to me - but have a look at LBS_HASTRINGS to be sure.

My suspicion is that the example snippet is just storing a pointer to some text in itemData in order to have something simple to draw. There's nothing to stop you have your code numbers in it, or neglecting it completely.

Iain.

Set background color to List control

Max++3-Oct-07 0:40

Max++

3-Oct-07 0:40

I try to subclass and use this code for change background color in list control

<br />
BOOL CSubListCtrl::OnEraseBkgnd(CDC* pDC) <br />
{<br />
   CRect rect;<br />
   GetClientRect(&rect);<br />
   pDC->FillSolidRect(0,0,rect.Width(),rect.Height(),RGB(100,200,0));<br />
   return TRUE;<br />
}

it work only when first time show.
but when I add item to it, that item will change to default color.

Please help me for solve this problem.

Re: Set background color to List control [modified]

Hamed Musavi3-Oct-07 0:53

Hamed Musavi

3-Oct-07 0:53

I think you should override DrawItem which will be called when each item of the control is to be drawn. Then use the input parameter for that function(lpDrawItemStruct) like this:

CDC dc;
dc.Attach(lpDrawItemStruct->hDC);

dc.FillSolidRect(&lpDrawItemStruct->rcItem, RGB(100,200,0));

dc.Detach();

You should also manually draw text of each item, check to see if it is selected to highlight it and draw a border for active item.

By the way if your list control is inside a dialog, take a look at OnCtlColor of the dialog. It makes life times easier if you just need to change background or text color of a dialog control.

-- modified at 6:59 Wednesday 3rd October, 2007

// "Life is very short and is very fragile also." Yanni
while (I'm_alive)
{
cout<<"I love programming.";
}

Re: Set background color to List control

Nishad S3-Oct-07 1:14

Nishad S

3-Oct-07 1:14

I wonder why you do such a thing when SetBkColor and SetTextBkColor are available for CListCtrl.

- NS -

Re: Set background color to List control

Hamid_RT3-Oct-07 2:06

Hamid_RT

3-Oct-07 2:06

See an example Alternate Row Colors for the CListCtrl[^].

Re: Set background color to List control

Nishad S3-Oct-07 2:17

Nishad S

3-Oct-07 2:17

But he needs a single bk color. So my suggestion is good, right?

- NS -

Re: Set background color to List control

Hamid_RT3-Oct-07 2:26

Hamid_RT

3-Oct-07 2:26

I didnt see your answer but I see your answer yeah its good and perfect.;) but he must tells more detaily of his control.

Space bar problem in scanf

syarif203-Oct-07 0:11

syarif20

3-Oct-07 0:11

scanf consider space bar as an end of input just like an enter key(carriage return), is it possible so that it shouldn't consider space bar as an end of input.

Re: Space bar problem in scanf

vikrant kpr3-Oct-07 0:26

vikrant kpr

3-Oct-07 0:26

does this works for you
char vl_sData1[111],vl_sData[1233];
sprintf(sData,"Hello World\n")
sscanf(sData,"%[^\n]" , vl_sData1)

Re: Space bar problem in scanf

David Crow3-Oct-07 2:44

David Crow

3-Oct-07 2:44

You are only partialy correct. When scanf() is processing a %s format specifier, it will continue until it encounters a whitespace character. If there are any more format specifiers, those will then get processed.

"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

Re: Space bar problem in scanf

Anurag Gandhi3-Oct-07 4:28

Anurag Gandhi

3-Oct-07 4:28

Use gets() function.
It will scan the string till you will press enter key.

Anurag Gandhi.
http://www.softgandhi.co.nr
Life is a computer program and every one is the programmer of his own life.

internal working of "sizeof()" operator

Sachinpatole2-Oct-07 23:47

Sachinpatole

2-Oct-07 23:47

Hi,
how does "sizeof" operator works internally?

Thanks

-Sachin

Re: internal working of "sizeof()" operator

Rajesh R Subramanian2-Oct-07 23:50

Rajesh R Subramanian

2-Oct-07 23:50

Did you try a simple Google search[^]?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->ßRÅhmmÃ<-·´¯`·.

Re: internal working of "sizeof()" operator

Sachinpatole3-Oct-07 0:02

Sachinpatole

3-Oct-07 0:02

I tried that also, but didn't get any solution.

-Sachin

Re: internal working of "sizeof()" operator

Nishad S3-Oct-07 1:22

Nishad S

3-Oct-07 1:22

Sachinpatole wrote:
I tried that also, but didn't get any solution.

You are lying... Smile | :)

- NS -

Re: internal working of "sizeof()" operator

Hamid_RT3-Oct-07 2:09

Hamid_RT

3-Oct-07 2:09

Sachinpatole wrote:
I tried that also, but didn't get any solution.

So google is not your friend.;)

Re: internal working of "sizeof()" operator

DQNOK3-Oct-07 3:29

DQNOK

3-Oct-07 3:29

The compiler "knows" the sizes of all types that are native, or have been declared up to that point. It merely substitutes an integer constant in place of the sizeof expression at compile-time. Unless you're talking about reflection or RTTI (run-time type identification), all the size information is known at compile time, so there is no run-time involvement; just a simple substitution. Much like using a #define or a const.

Hope this helps.

David

exception handling

Daniel Kanev2-Oct-07 23:47

Daniel Kanev

2-Oct-07 23:47

I do not know a way to get all exceptions.

try
{
}
catch(CException *e){}

is not working for all exceptions. If I put catch(...) it is ok but I cannot get the error message this way.
Do you know what I can put in the catch () so that I can handle all exceptions having their messages.
Thank you!

modified 8-Mar-17 3:46am.

Re: exception handling

Waldermort2-Oct-07 23:51

Waldermort

2-Oct-07 23:51

In order to catch everything, you need to look at the docs for the function which is throwing the exception and then add a catch statement specific for that.

try<br />
{<br />
}<br />
catch(CException *e)<br />
{<br />
}<br />
catch(LPTSTR szErr)<br />
{<br />
}<br />
catch(...)<br />
{<br />
}

Waldermort

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