list control

[David Crow]

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

[FarPointer]

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

[jokefake]

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 }

[jokefake]

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 }

[David Crow]

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

[jokefake]

thanks it is now working

[David Crow]

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

[jokefake]

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

[David Crow]

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

[jokefake]

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 }

[David Crow]

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

[jokefake]

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; }

[David Crow]

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

[jokefake]

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

[David Crow]

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

[jokefake]

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); }

[David Crow]

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

[jokefake]

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);

[David Crow]

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

[jokefake]

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