Re: ListView_SortItems question - C / C++ / MFC Discussion Boards

Tom Wright15-Sep-05 8:29

15-Sep-05 8:29

I'm having a bit of a problem getting the handle to my listview. Can anyone suggest how I would pass this so that I can get the listview text and compare?

Thanks

Tom Wright
tawright915@yahoo.com

Re: ListView_SortItems question

ClockDivider15-Sep-05 9:11

ClockDivider

15-Sep-05 9:11

I am not that experienced but as far as i know you have to pass a callback funtion as parameter:

i have done it useing mfc so zou have to translate that somewhat, this is the member function i declared as member of my derived listview, this example is used to sort numeric columns:

static int CALLBACK CallbackSortNumeric(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort);

Then, when you add a column, you have to pass the adress of the function (PFNLVCOMPARE pCALLBACKSORT):

this->InsertColumn(nCol, cHead,pCALLBACKSORT,iSortMode,iFormat, nWidth,nSubItem);

This way the sorting is managed in CallBackSortNumeric.

Hope it helps...

Martin...

Re: ListView_SortItems question

Tom Wright15-Sep-05 10:06

Tom Wright

15-Sep-05 10:06

ClockDivider wrote:
I am not that experienced but as far as i know you have to pass a callback funtion as parameter:

Yeah I did that. My problem is that in my callback I need to access the window handle and I cannot. I get a compiler error:
illegal reference to data member 'FileTransfer::hWnd' in a static member function

Here is my callback code:

<br />
int CALLBACK FileTransfer::ListViewCompareProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)<br />
{<br />
	static LV_FINDINFO fi;<br />
	static int		 nItem1, nItem2;<br />
	static char		szBuf1[30], szBuf2[30];<br />
<br />
	// Determine the items that we are comparing.<br />
	//...........................................<br />
	fi.flags = LVFI_PARAM;<br />
	fi.lParam = lParam1;<br />
	<br />
	nItem1 = ListView_FindItem(hWnd, -1, &fi);<br />
 <br />
	fi.lParam = lParam2;<br />
	//nItem2 = ListView_FindItem(hWnd, -1, &fi);<br />
<br />
<br />
	return 0;<br />
}<br />

Thanks

Tom Wright
tawright915@yahoo.com

Re: ListView_SortItems question

ClockDivider15-Sep-05 10:40

ClockDivider

15-Sep-05 10:40

I am not sure why Smile | :)

but here is some code i have in my function that might belong to the problem:

int CALLBACK CListCtrlEx::CallbackSortString(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
// lParamSort contains a pointer to the list view control.
CListCtrlEx* pListCtrl = (CListCtrlEx*) lParamSort;
}

Thus you should be able to convert lParamSort to a CWnd* which then provides the propper m_hWnd

Is that true?

Re: ListView_SortItems question

Tom Wright15-Sep-05 11:30

Tom Wright

15-Sep-05 11:30

The problem with this is that I'm not using any MFC.

Here is my event code:

<br />
LPNMLISTVIEW lpNmlv = (LPNMLISTVIEW) lParam;<br />
<br />
			case LVN_COLUMNCLICK:<br />
				if (lpNmlv->hdr.hwndFrom == GetDlgItem(hWnd, IDC_LOCAL_FILELIST))<br />
				{<br />
					ListView_SortItems(lpNmlv->hdr.hwndFrom, ListViewCompareProc,(LPARAM)(lpNmlv));<br />
				}<br />
<br />
				if (lpNmlv->hdr.hwndFrom == GetDlgItem(hWnd, IDC_REMOTE_FILELIST))<br />
				{<br />
					HWND RemoteHwnd = GetDlgItem(hWnd, IDC_REMOTE_FILELIST);<br />
				}<br />
				return TRUE;<br />
<br />
<br />
int CALLBACK FileTransfer::ListViewCompareProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)<br />
{<br />
	static LV_FINDINFO fi;<br />
	static int		 nItem1, nItem2;<br />
	static char		szBuf1[30], szBuf2[30];<br />
	NMLISTVIEW *lpNmlv = (NMLISTVIEW*)lParamSort;<br />
<br />
	// Determine the items that we are comparing.<br />
	//...........................................<br />
	fi.flags = LVFI_PARAM;<br />
	fi.lParam = lParam1;<br />
	<br />
	nItem1 = ListView_FindItem(lpNmlv->hdr.hwndFrom, -1, &fi);<br />
 <br />
	fi.lParam = lParam2;<br />
	nItem2 = ListView_FindItem(lpNmlv->hdr.hwndFrom, -1, &fi);<br />
	// Retrieve the item text so we can compare it.<br />
	//.............................................<br />
	ListView_GetItemText(lpNmlv->hdr.hwndFrom, nItem1, lParamSort, szBuf1, sizeof(szBuf1));<br />
	ListView_GetItemText(lpNmlv->hdr.hwndFrom, nItem2, lParamSort, szBuf2, sizeof(szBuf2));<br />
 <br />
	// Return the comparison results.<br />
	//...............................<br />
	if (lpNmlv) // ACENDING ORDER<br />
		return(strcmp(szBuf1, szBuf2));<br />
	else<br />
		return(strcmp(szBuf1, szBuf2) * -1);<br />
<br />
}<br />

Thanks

Tom Wright
tawright915@yahoo.com

Re: ListView_SortItems question

ClockDivider15-Sep-05 12:14

ClockDivider

15-Sep-05 12:14

Ummm... Your code compiles here...

But you already changed the calling of the ListView_FindItem and ListView_GetItemText, now using the lpNmlv.>hdr.hwndFrom, no?

What is the exact compiler error?

Re: ListView_SortItems question

Tom Wright15-Sep-05 12:34

Tom Wright

15-Sep-05 12:34

Yeah it compiles fine now. Just still not getting anything. I think I'm not setting my pointers correctly or the NMLISTVIEW struct.

You know there aren't very many samples of how to use this out there on the internet. Must be used much.

Tom Wright
tawright915@yahoo.com

Re: ListView_SortItems question

ClockDivider15-Sep-05 13:49

ClockDivider

15-Sep-05 13:49

The prob is this in:

ListView_GetItemText(lpNmlv->hdr.hwndFrom, lParam2, lParamSort, szBuf2, sizeof(szBuf2));

the parameter lParamsort is wrong here, it should define the column (lpNmlv->iSubItem).

AND: Do you to set the LPARAM value when inserting your item?

Here is an excerpt from .NET help: "The lParam1 parameter is the 32-bit value associated with the first item being compared, and the lParam2 parameter is the value associated with the second item. These are the values specified in the lParam member of the items’ LVITEM structure when they were inserted into the list."

I hade precisely the same problems as you, now that I assured being the item.lPram member valid and changing the wrong parameter value to the item.iSubitem it works...

Hope it helps now?...

Re: ListView_SortItems question

Graham Bradshaw15-Sep-05 13:43

Graham Bradshaw

15-Sep-05 13:43

Tom Wright wrote:
My problem is that in my callback I need to access the window handle and I cannot

That's what the lParamSort paramter is for. You pass in whatever you want (for examnple, a number or a pointer to a data structure), and the same value is passed to your comparison function. Your comparision function can then interpret that lParam in the right way (as a number or dereference the pointer to get the data structure again), and process it.

Re: ListView_SortItems question

David Crow15-Sep-05 16:55

David Crow

15-Sep-05 16:55

I think you should be using ListView_GetItemData() with lParam1 and lParam2.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Copy a directory

anderslundsgard15-Sep-05 8:12

anderslundsgard

15-Sep-05 8:12

I’ve used the CopyFile function for copy a file, but are there any “CopyDirectory”-function?

_____________________________

...and justice for all

APe

Re: Copy a directory

Ravi Bhavnani15-Sep-05 8:57

Ravi Bhavnani

15-Sep-05 8:57

See SHFileOperation()[^].

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Re: Copy a directory

ThatsAlok15-Sep-05 17:51

ThatsAlok

15-Sep-05 17:51

d00_ape wrote:
’ve used the CopyFile function for copy a file, but are there any “CopyDirectory”-function?

In Continuation with Mr. Ravi, this link provide you wrapper to ShFileOperation:-
http://www.codeproject.com/shell/cshellfileop.asp[^]

"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

Adding Date Time Picker to List Control

ExtraLean15-Sep-05 8:08

ExtraLean

15-Sep-05 8:08

How would one go about adding a date time picker control to a list control (in report view)?

--
Edward Livingston
(aka ExtraLean)
--
"I still maintain that seeing a nipple is far less disturbing than seeing someone get their brains blown out." -- Chris Maunder

Change CRichEditCtrl CFE_LINK color

cbusgut15-Sep-05 6:49

cbusgut

15-Sep-05 6:49

Hi
I have used the CFM_LINK, CFE_LINK style to some text in my CRichEditCtrl. The problem is that whatever color you choose for the whole text, the text with link properties is always blue and underlined. Due to design constrains, the background color of my CRichEditCtrl is... blue. Frown | :(

How could I change the color of the link text?

Thanks in advance

c++ and canonical xml

Imre Koszo15-Sep-05 5:59

Imre Koszo

15-Sep-05 5:59

Hello!

I have to write a class in c++ which takes a char* as input, which is the content of an xml document, and gives back the canonical form of it without comments.

The problem is: i have to use msxml 4.0 or older, i cannot use .net, libxml etc.

I have been searching the web for a while now but nothing. If anybody could help me please do so.

Re: c++ and canonical xml

David Crow15-Sep-05 6:29

David Crow

15-Sep-05 6:29

Ruis Ngetal wrote:
...and gives back the canonical form of it without comments.

Are you wanting to canonicalize the name of the XML file or its contents? If the latter, are the strings actually file paths or URLs?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: c++ and canonical xml

Imre Koszo15-Sep-05 22:31

Imre Koszo

15-Sep-05 22:31

Well i get a string like:

"<?xml version="1.0"?>

<?xml-stylesheet href="doc.xsl"
type="text/xsl" ?>

<!DOCTYPE doc SYSTEM "doc.dtd">

<doc>Hello, world!</doc>

<?pi-without-data ?>



"

with all the whitespaces and linefeeds and the like, and i have to give back something like this:
"<?xml-stylesheet href="doc.xsl"
type="text/xsl" ?>
<doc>Hello, world!</doc>
<?pi-without-data?>"

normalizing the line feeds and whitespaces etc. as written in w3c's c14n standard (http://www.w3.org/TR/2001/REC-xml-c14n-20010315)

so i have to make a c14n canonicalizer.

Re: c++ and canonical xml

David Crow16-Sep-05 2:01

David Crow

16-Sep-05 2:01

Ruis Ngetal wrote:
so i have to make a c14n canonicalizer.

I wonder if the document's author, John Boyer, knows of any such utility.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

C++/Java Codes for RHPOP3Connect

codedigger2215-Sep-05 4:55

codedigger22

15-Sep-05 4:55

When open up the RHPOP3Connect.ntf (freeware downloaded at http://www.rhacl.de/freesoft.html), there are four java classes for: RHPOP3Connector, Pop3Mail, SMTPMail, and SocketMail. Anyone knows the source code for them?

David Li

what about x = x++; ?

pesho293215-Sep-05 4:55

pesho2932

15-Sep-05 4:55

int x = 1;
x = x++;

I think this should be well defined.
The operations are:
1. ++
2. =
As the expression x++ is an operand of operator=, I think it should be evaluated first (??).
The final value of x should then be 1.

But the increment seems to occur after the assignment. And x = 2.

Re: what about x = x++; ?

C^hris L^osinger15-Sep-05 5:35

C^hris L^osinger

15-Sep-05 5:35

pesho2932 wrote:
But the increment seems to occur after the assignment.

x++ is the post-increment operator. it increments after returning the value of the variable.

++x is the pre-increment operator. it increments before returning the value of the variable.

Cleek | Image Toolkits | Thumbnail maker

Re: what about x = x++; ?

Anonymous15-Sep-05 6:32

Anonymous

15-Sep-05 6:32

I know that (of course).

It can still be after the return and before the assignment. I think it should be there because the expression x++ is evaluated before the assignemet and it's effect should be complete by the time assignment occurs.

Re: what about x = x++; ?

C^hris L^osinger15-Sep-05 6:52

C^hris L^osinger

15-Sep-05 6:52

the steps for x = x++; go like this:

1. x++ evaluates to x (1).

1a. the ++ does not happen until after the expression containing it is complete (roughly speaking)

2. assign the value from step 1 to x (x=1)

3. x++ is performed, which increases x (2)

Cleek | Image Toolkits | Thumbnail maker

Re: what about x = x++; ?

David Crow15-Sep-05 6:37

David Crow

15-Sep-05 6:37

pesho2932 wrote:
As the expression x++ is an operand of operator=, I think it should be evaluated first (??).

Wrong. The ++ operator will complete before anything is assigned. Why would you want a half-baked value to be assigned to x?

pesho2932 wrote:
The final value of x should then be 1.

It should be 2 as the current value of x, which is 1, is incremented by one, and the result of 2 is then assigned to x.

pesho2932 wrote:
But the increment seems to occur after the assignment. And x = 2.

Correct.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.