C / C++ / MFC

10-Feb-10 1:21

Hi,

I'm using a CListCtrl with some customisation such that selecting an item will bring up a drop down list for selection.

If I use a CComboBox then the drop down list is visible outside of the CListCtrl window, but if I use a CListBox then although the list box is created properly, it is not visible outside of the list control window.

Is there a style I am missing when creating my List Box? I am currently using WS_CHILD, WS_VISIBLE and WS_BORDER to define the appearance.

TIA

Tony

loyal ginger10-Feb-10 1:35

loyal ginger

10-Feb-10 1:35

Since the list box has WS_CHILD, it will be confined in the parent window (which is the list control). Without knowing the details of your design, I currently cannot think of a solution to your problem.

modified on Wednesday, February 10, 2010 7:44 AM

David Crow10-Feb-10 3:49

David Crow

10-Feb-10 3:49

You are using CListBox, CListCtrl and "List Box" interchangeably. Which is it?

"One man's wage rise is another man's price increase." - Harold Wilson

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maycockt10-Feb-10 3:58

10-Feb-10 3:58

I have a dialog that displays of list of configurable settings.
This list of settings is presented to the user in the form of a CListCtrl.
Some of the items have defined settings, so when I click on the chosen item a list of available options is presented to the user in the form a CListBox. The user then makes his selection from this list, and the CListBox closes, updating the CListCtrl item with the text of the newly chosen item.

The CListBox is created on the fly, with the style settings outlined in my original post.

The problem is that the height of the CListBox is clipped at the bottom edge of the CListCtrl, whereas I would like the CListBox to display it's full list on top of the whole dialog, not just the CListCtrl.

Hopefully that is a bit clearer.

TIA

Tony

David Crow10-Feb-10 4:00

David Crow

10-Feb-10 4:00

Why not create the listbox (or listboxes) at design time (rather than runtime) and just show/hide it (them) as necessary?

maycockt10-Feb-10 4:07

10-Feb-10 4:07

Hi,

The same list box is used for 5 different settings, and contains differing data for each configuration setting. The style of the list box is different foe each configuration setting, i.e. in as much as some settings require a vertical scroll bar due to the number of options available, and some settings dont.

The start position of the List Box is obviously different for each configuration setting.

I did try a CComboBox solution initially, but this looked untidy as it's height could not be reduced to the height of a List Control item. The drop down list of the CComboBox though did sit nicely over the top of everything.

TIA

Tony

David Crow10-Feb-10 4:12

David Crow

10-Feb-10 4:12

maycockt wrote:
The same list box is used for 5 different settings...

And you think Windows will get angry/confused for creating multiple listboxes, one for each configuration?

maycockt10-Feb-10 4:20

10-Feb-10 4:20

Hi,

Each time I need a CListBox I create a new one of the style required, in the location required.
When I'm finished with it, I tidy it up.

Even if I used just 1 list box and left it there, I'd still have the same problem of my CListBox having it's height clipped and not being able to see all the data that the CListBox is displaying.

Is there a way to set the CListBox so it will be completely visible?

TIA

Tony

loyal ginger10-Feb-10 4:49

loyal ginger

10-Feb-10 4:49

Have you tried to not use WS_CHILD style on the listbox? Instead, use WS_POPUP style so it will not be confined in the parent window (i.e., the list control).

maycockt11-Feb-10 4:31

11-Feb-10 4:31

Still no joy on this one........

I tried creating with CreateEx as well as Create, and I've tried pretty much every style option that is available.
Even when using a single CListBox item for each of the configuration options, I'm still getting the problem of the CListBox being clipped.

Any further ideas?

Thanks for the help so far.

TIA

Tony

Problem in File seek()

Member 439977110-Feb-10 1:08

Member 4399771

10-Feb-10 1:08

Hi All,

I am reading some big files having thousands of lines, my requirement is to write some thing on the last but one line(i know the length of last line). how to seek my file pointer to last but one line with out seeking all the position from the beginning of the file?

i tried with some code, but not achieving the right goal. please check the code

long seekval = assfile.SeekToEnd();
assfile.Seek((seekval - 4.0),0);
assfile.WriteString(_T("some text"));

assfile is the CStdioFile obj.
4 is the length of the last line.

Thanks in advance.

Regards,
Kumar

Richard MacCutchan10-Feb-10 1:46

Richard MacCutchan

10-Feb-10 1:46

A quick look at the MSDN[^] page suggests this answer:

assFile.Seek(-4, CFile::end);

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Mircea Puiu10-Feb-10 1:48

Mircea Puiu

10-Feb-10 1:48

Read the content of the file, modify what you need, write the file back. You cannot modify a line directly in a text file.

SkyWalker

normanS11-Feb-10 22:45

normanS

11-Feb-10 22:45

Are you sure about that?

My memory - not that I've done file handling in the last 4 or 5 years - says that you can modify whatever you want, you just can't add any characters or take away any characters (so you can't add a line of text to a text file, but you can change "Paul" to "Fred".

loyal ginger10-Feb-10 1:49

loyal ginger

10-Feb-10 1:49

If you are using CFile, then the second parameter for the Seek() method is from where to seek. In your case you should seek from the end of the file, using CFile::end. In your code, you are seeking from the beginning of the file.

--modification--

Sorry, Richard MacCutchan had already answered the question. Ignore mine, please!

Member 467820123-Feb-10 4:24

Member 4678201

23-Feb-10 4:24

First Read the last line
Move this line by the length of line you want to add in front.
Then paste the required line above it

I hope this will do

ashwani

antispyware

NetDefender 20099-Feb-10 23:47

NetDefender 2009

9-Feb-10 23:47

can anyone help me to buid a antispyware software in VC++.mai me at joeld_88@rediffmai .com.TNX in advance

Richard MacCutchan10-Feb-10 0:20

Richard MacCutchan

10-Feb-10 0:20

This is a ridiculous question. You are asking for a program that commercial organisations spend years developing. Nobody can give you that information in a few sentences or lines of code.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

glitteringsound10-Feb-10 0:26

glitteringsound

10-Feb-10 0:26

You need to learn some programming to hook certain exes and get familiarity with headers and formats of EXE's to hook and process according to your needs. This can lead you to better explore the virus and Trojans activities in the system.

Good Luck
Regards
Muhammad Usman Khalil

CPallini10-Feb-10 0:40

CPallini

10-Feb-10 0:40

While you need to learn how to post at the right place... Roll eyes | :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Richard MacCutchan10-Feb-10 0:42

Richard MacCutchan

10-Feb-10 0:42

You forgot the Smile | :)

txtspeak is the realm of 9 year old children, not developers. Christian Graus

CPallini10-Feb-10 0:43

CPallini

10-Feb-10 0:43

NetDefender 2009 wrote:
can anyone help me to buid a antispyware software in VC++

Yes, I may send you a lot of spyware applications to be used as test cases... Wink | ;)