Re: list control - C / C++ / MFC Discussion Boards

Re: list control

David Crow10-Jul-06 4:19

David Crow

10-Jul-06 4:19

jokefake wrote:
1) how do i delete an item from the list control

By using the DeleteItem() method.

jokefake wrote:
2)how do i move an item up or down in the list contol using "up buttom" and
"down buttom" i have created

By deleting it and inserting it into the correct location.

jokefake wrote:
3)how do i make the "add buttom" disable when i have 8 items in the list
control.

By using the EnableWindow() method.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake10-Jul-06 5:46

jokefake

10-Jul-06 5:46

i did sth like this but it is not working

void CSpeedDial::OnSpeedDelete()
{
POSITION pos = m_speedList.GetFirstSelectedItemPosition();
if(pos == NULL) return;
int index = m_speedList.GetNextSelectedItem(pos);
if(index<0 || index>m_speedList.GetItemCount()||
m_speedList.GetItemCount()!= m_speedArray.GetSize())
return;
m_speedList.DeleteItem(index);
m_speedArray.RemoveAt(index);
// TODO: Add your control notification handler code here

}

Re: list control

David Crow10-Jul-06 6:11

David Crow

10-Jul-06 6:11

jokefake wrote:
i did sth like this but it is not working

So what's not working with it? You've got a lot of code there that needs to be narrowed down to just a single statement or two. Set breakpoints. Use the debugger. Step into the code to see what is going on.

The first thing to try is this:

void CSpeedDial::OnSpeedDelete() 
{
    m_speedList.DeleteItem(0);
}

If this works, then you know what the problem is not.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake10-Jul-06 6:39

jokefake

10-Jul-06 6:39

thanks it is now working

Re: list control

David Crow10-Jul-06 6:41

David Crow

10-Jul-06 6:41

Why don't you share with others what the resolution was?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake10-Jul-06 6:48

jokefake

10-Jul-06 6:48

i just removed some of the lines from the code

void CSpeedDial::OnSpeedDelete()
{
POSITION pos = m_speedList.GetFirstSelectedItemPosition();
int index = m_speedList.GetNextSelectedItem(pos);
m_speedList.DeleteItem(index);
// TODO: Add your control notification handler code here

}

but how can i move an item up and down in the list

i am a beginner

Re: list control

David Crow10-Jul-06 7:31

David Crow

10-Jul-06 7:31

jokefake wrote:

i just removed some of the lines from the code

void CSpeedDial::OnSpeedDelete()
{
POSITION pos = m_speedList.GetFirstSelectedItemPosition();
int index = m_speedList.GetNextSelectedItem(pos);
m_speedList.DeleteItem(index);
// TODO: Add your control notification handler code here

}

Which can be shortened to:

void CSpeedDial::OnSpeedDelete() 
{
    int index = m_speedList.GetNextItem(-1, LVIS_SELECTED);
    if (index != -1)
        m_speedList.DeleteItem(index);
}

jokefake wrote:
but how can i move an item up and down in the list

By deleting it and inserting it into the correct location.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake11-Jul-06 1:57

jokefake

11-Jul-06 1:57

thanks, that code is really short and simple.

I tried moving a selected item up in the list control, but it is not working.
what may wrong with the code

void CTestingDlg::OnUp()
{
int index = m_cListCtrl.GetNextItem(-1, LVIS_SELECTED);

m_cListCtrl.InsertItem(index -1, m_cListCtrl.GetItemText(index, index));

m_cListCtrl.DeleteItem(index +1);

// TODO: Add your control notification handler code here

}

Re: list control

David Crow11-Jul-06 2:07

David Crow

11-Jul-06 2:07

Delete first, then insert.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake11-Jul-06 2:57

jokefake

11-Jul-06 2:57

deleting it first, deletes the row as i click on the buttom

i extracted my code from here.

BOOL CListCtrlEx::MoveRow(int from, int to)
{
//Can't move to the same place, or from or to a negative index
if(from == to || from < 0 || to < 0)
return FALSE;

//First Copy the row to the new location
if(CopyRow(from, to))
{
//If we have just inserted a row before
//this one in the list, we need to increment
//our index.
if(from > to)
DeleteItem(from + 1);
else
DeleteItem(from);

return TRUE;
}
else
return FALSE;
}

BOOL CListCtrlEx::CopyRow(int from, int to)
{
//Can't move to the same place, or from or to a negative index
if(from == to || from < 0 || to < 0)
return FALSE;

//Copy the row to the new index
InsertItem(to, GetItemText(from, 0));

//If row has been inserted before original
//increment the original
if(from > to)
from++;

//Loop through subitems
for(int i = 1; i < GetColumnCount(); i++)
{
SetItemText(to, i, GetItemText(from, i));
}

return TRUE;
}

Re: list control

David Crow11-Jul-06 4:52

David Crow

11-Jul-06 4:52

It's not a good idea to copy code from elsewhere unless you have a good understanding of what it is doing. If the code is doing a specific task and you copy it to a new location, its role will change.

void OnClickMoveUp( void )
{
    int         nIndex;
    CString     strCommand;
 
    nIndex = m_listctrl.GetNextItem(-1, LVNI_SELECTED);
    ASSERT(-1 != nIndex);
 
    strCommand  = m_listctrl.GetItemText(nIndex, 0);
 
    m_listctrl.DeleteItem(nIndex);
 
    nIndex = m_listctrl.InsertItem(nIndex - 1, strCommand);
}

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake11-Jul-06 5:29

jokefake

11-Jul-06 5:29

thanks, it works perfectly with a list with only one column, what about if you have 2 columns

Re: list control

David Crow11-Jul-06 5:39

David Crow

11-Jul-06 5:39

jokefake wrote:
it works perfectly with a list with only one column, what about if you have 2 columns

Multiple calls to GetItemText(), for starters.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake11-Jul-06 6:01

jokefake

11-Jul-06 6:01

i did sth like this and the result was no good at all

void CTestingDlg::OnUp()
{

int nIndex;
CString strCommand,strCommand2;
nIndex = m_cListCtrl.GetNextItem(-1, LVNI_SELECTED);
ASSERT(-1 != nIndex);
strCommand = m_cListCtrl.GetItemText(nIndex, 0);
strCommand2 = m_cListCtrl.GetItemText(0,nIndex);
m_cListCtrl.DeleteItem(nIndex);
nIndex = m_cListCtrl.InsertItem(nIndex - 1, strCommand);
m_cListCtrl.SetItemText(nIndex-1,1, strCommand2);
}

Re: list control

David Crow11-Jul-06 6:19

David Crow

11-Jul-06 6:19

jokefake wrote:
strCommand2 = m_cListCtrl.GetItemText(0,nIndex);

Should be:

strCommand2 = m_cListCtrl.GetItemText(nIndex, 1);

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

jokefake11-Jul-06 7:02

jokefake

11-Jul-06 7:02

do i have to do changes to the last code. the text on the 2nd column are not showing

m_cListCtrl.SetItemText(nIndex-1,1, strCommand2);

Re: list control

David Crow11-Jul-06 7:11

David Crow

11-Jul-06 7:11

jokefake wrote:
the text on the 2nd column are not showing

What does SetItemText() return? Have you verified that strCommand2 contains anything?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control [modified]

jokefake11-Jul-06 23:50

jokefake

11-Jul-06 23:50

strCommand contains the correct string. i think the problem have to do with the SetWindowText. do you have any suggestion of what i can do.
-- modified at 6:02 Wednesday 12th July, 2006

Re: list control

David Crow12-Jul-06 2:23

David Crow

12-Jul-06 2:23

jokefake wrote:
i think the problem have to do with the SetWindowText.

SetWindowText() is not used with a list control.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: list control

FarPointer10-Jul-06 4:23

FarPointer

10-Jul-06 4:23

1)Try CListCtrl::DeleteItem
2)Try LVN_KEYDOWN Notification after adding notify_reflect
3)Try LVN_INSERTITEM Notification and keep a counter along with the LVN_DELETEITEM were you will decrement it and wen it becomes 8 disable it .

Regards,
FarPointer
Blog:FARPOINTER

Re: list control

jokefake10-Jul-06 5:49

jokefake

10-Jul-06 5:49

i try sth like this but is not working

void CSpeedDial::OnSpeedDelete()
{
POSITION pos = m_speedList.GetFirstSelectedItemPosition();
if(pos == NULL) return;
int index = m_speedList.GetNextSelectedItem(pos);
if(index<0 || index>m_speedList.GetItemCount()||
m_speedList.GetItemCount()!= m_speedArray.GetSize())
return;
m_speedList.DeleteItem(index);
m_speedArray.RemoveAt(index);
// TODO: Add your control notification handler code here

}

WIN32 and MFC FAQ's

Abhi Lahare10-Jul-06 3:39

Abhi Lahare

10-Jul-06 3:39

Hi all,

Can anyone point me the links where i can find Win32 and MFC faq (not releated to UI Programming). on topics like Multi-Threading,Sockets, IPC, Hooks for quick refernce and with quick example.

Regards
Abhishake

Re: WIN32 and MFC FAQ's

Sarath C10-Jul-06 4:13

Sarath C

10-Jul-06 4:13

http://people.montana.com/~bowman/Software/winAPI.htm[^]

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

<blink>My Blog | Understanding State Patte

Re: WIN32 and MFC FAQ's

Jun Du10-Jul-06 4:32

Jun Du

10-Jul-06 4:32

Wow, that is a big take. Jeffery Ritcher's book "Programming Applications with Microsoft Windows" is a must for system (non-GUI) developers. I don't think it has a free web version, though.

Best,
Jun

Re: WIN32 and MFC FAQ's

earl10-Jul-06 5:26

earl

10-Jul-06 5:26

MSDN

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