Editable Table Control - CodeProject

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Sample Image - editable_list.jpg

Introduction

I had to implement some kind of list representation of a certain product-sell table (Product | Price | ProductID | Amount ). So, I decided to use ListCtrl for that matter. Basically, ListCtrl is fun to play with. One of the styles supported by ListCtrl is called report-view, which is used here. ListCtrl also allow editable entries as one of its styles. Unfortunately, when dealing with report-view, editing is applied only to the first column‘s elements.

My Solution

The solution was to create an Edit window on-demand, on top of the according cell-entry. Then, when done editing, a notification message is sent to parent ListCtrl. Thinking this idea is simple enough, I have also perfected it to create ComboBox on demand for certain cells to narrow the input options ( Such as Product field, which is out of the predefined list of elements ).

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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About the Author

shilonir

Israel

Member

Nir Shilon -
B.Sc. in Mathematics & Computer Science of Tel-Aviv University.
I have worked for the past 2 years in DSPG as a R&D software engineer.
As part of Debugger/Simulator team ( Myself, Anna & Yair).
I basically taught myself MFC and other Win32 programming stuff.

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edit other columns

30 Apr '13 - 5:38

1

Hi, how to make other columns editable. if i changed value in the other columns it will revert back to default value. I want to change price and ammount for any item. can i change that at runtime? Thank you.
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29 Nov '11 - 11:29

1

Excellent, quick & easy.
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How to do sorting

6 Jul '09 - 19:21

1

Hi, in my editlist one colom having string type. And there are more than 500 string in that list. I want that strings will be selected by simply typing character one by one. I dont want to select it manually by scrolling. Is it possible.?
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CBS_DROPDOWN err

25 Apr '07 - 4:30

3

Hi, Tried ur code. When Tried with modified combo style CBS_DROPDOWN INSTED OF CBS_DROPDOWNLIST, on click creates combobox & immediately calls onkill todestroy the window. Why is this? Pl.Help V.Bala bala_potty
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Thank you very much!!!!

20 Nov '06 - 23:23

1

I had found a lot of infomation online,but you example is the best!! thank you
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4 Jan '05 - 15:32

1

My list has 3 columns. The first column has a string which has 25 characters in it. If I edit the 'third column' the 'first column' string is edited down to 15 characters. Need a code fix?
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Short lists, no scoll bars, autoset drop down height

21 Sep '04 - 10:59

1

If you have a very short list to display in the drop - say only 2 items - then the presence of the horizontal scroll at the bottom tends to obscure much of the fist item and all of the second item.   Of course one could use the vertical scroller to scroll up and down between the items, but have you seen the size of the scroll buttons?

My proposal is that if there are not so many items in, say less than 10, then set the style as....

<code>
     if(lstItems.GetCount() < 10)
          dwStyle = WS_BORDER|WS_CHILD|WS_VISIBLE                              |CBS_DROPDOWNLIST|CBS_DISABLENOSCROLL;
     else
          dwStyle = WS_BORDER|WS_CHILD|WS_VISIBLE|WS_VSCROLL|WS_HSCROLL                              |CBS_DROPDOWNLIST|CBS_DISABLENOSCROLL;
</code>

And then one can use the autosizing function (which must be provided by oneself) to adjust the heoight of the combobox to show all items in the list....
<code>     if(lstItems.GetCount() < 10)
          CDialogHelpers::SetComboBoxDropDownHeight(pList);</code>

where the function <code>CDialogHelpers::SetComboBoxDropDownHeight()</code> is implemented as follows.

<code>
void CDialogHelpers::SetComboBoxDropDownHeight(CComboBox *box, UINT nLinesToDisplay /* = -1 */)
{
     AFX_MANAGE_STATE(AfxGetStaticModuleState());

     ASSERT(IsWindow(*box));     // Window must exist or SetWindowPos won't work

     if(nLinesToDisplay == -1)
     {
          nLinesToDisplay = box->GetCount();
     }

     CRect cbSize;               // current size of combo box
     int Height;                    // new height for drop-down portion of combo box

     box->GetClientRect(cbSize);
     Height = box->GetItemHeight(-1);                                   // start with size of the edit-box portion
     Height += box->GetItemHeight(0) * (nLinesToDisplay + 1);     // add height of lines of text

     // Note: The use of SM_CYEDGE assumes that we're using Windows '95
     // Now add on the height of the border of the edit box
     Height += GetSystemMetrics(SM_CYEDGE) * 2;     // top & bottom edges

     // The height of the border of the drop-down box
     Height += GetSystemMetrics(SM_CYEDGE) * 2;     // top & bottom edges

     // now set the size of the window
     box->SetWindowPos(NULL,                    // not relative to any other windows
          0, 0,                                   // TopLeft corner doesn't change
          cbSize.right, Height,               // existing width, new height
          SWP_NOMOVE | SWP_NOZORDER          // don't move box or change z-ordering.
          );
}
</code>

Excuse the use of the magic number 10 above, this would be replaced with a <code>#define</code> or <code>const</code> of course.

Hope this minor improvements helps any others out there who are frustrated by short lists appearing too small.

Jordan

question about ListCtrl EditBox and ComboBox

27 Jan '04 - 3:22

1

I have a question to Shilonir.

Could you explain me this part of your code.Thanks in advance.
//basic code start
CRect rect;
int offset = 0;
// Make sure that the item is visible
if( !EnsureVisible(nItem, TRUE))
return NULL;

GetSubItemRect(nItem, nSubItem, LVIR_BOUNDS, rect);
// Now scroll if we need to expose the column
CRect rcClient;
GetClientRect(rcClient);
if( offset + rect.left < 0 || offset + rect.left > rcClient.right )
{
CSize size;
size.cx = offset + rect.left;
size.cy = 0;
Scroll(size);
rect.left -= size.cx;
}

rect.left += offset;
rect.right = rect.left + GetColumnWidth(nSubItem);
if(rect.right > rcClient.right)
rect.right = rcClient.right;
//basic code end

How to use Editable List Control in CFrameView WIndow

T R Raghavendra

6 Dec '03 - 2:28

1

Hi, I would like to use Editable Table Control in CFrameView Window. ( Some where in middle of the window) Same code and the concept if I use for a ListControl in CFrameView, It doesn't work. Which part of the code I have to modify? Please help me. Thanks & Regards, T R Raghavendra
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Problem with scrolling

21 Apr '03 - 21:08

4

Nice work but... when the list goes scrolling while editing the edit should loose the focus! Cabbi
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How to suppress a combo box when uses Checboxes?

28 Jan '03 - 7:43

1

Hi Nir Shilon
First of all congratulations for your work, I am very happy to work with it.

I define a new state eNone, for that part of the Editcontrol that could not be edited by the user.
Now I have a little problem. I use the extended style LVS_EX_CHECKBOXES in my Editcontrol. If the Checkbox is FALSE I want to forbid editig the listcontrol.
That means normally when Checkbox is TRUE and I click on the Edittcontrol the Combobox appears, thats all right and works very well, but when the checkbox is FALSE I don't want appearing the combobox.
I changed the following function:

void CEditList::OnClick(NMHDR* pNMHDR, LRESULT* pResult) 
{
	// TODO: Add your control notification handler code here
	if( GetFocus() != this) 
		SetFocus();
 
	NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
 
	if ( m_fGetType && m_fGetType( pNMListView->iSubItem ) == eCombo )
		ComboItem(pNMListView->iItem, pNMListView->iSubItem);
	else
    {
        //new yummi
    	if ( m_fGetType && m_fGetType( pNMListView->iSubItem ) != eNone )
    		EditItem (pNMListView->iItem, pNMListView->iSubItem);
    }
	*pResult = 0;
}

My first way to realise it was changing the Editcotrol from eCombo to eNone for all cols in that row but on the line



if ( m_fGetType && m_fGetType( pNMListView->iSubItem ) == eCombo )

I've got an exception.

Can you tell me how I can realise it?

Many thanks
yummi

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Author's response to supid

24 Aug '01 - 1:41

1

dear Sudip thnx for you comment i wanted to encapsulate this functionality inside a simple CEditList which could later be derived from. i am familiar with your idea, which would of-course work. yet due to the fact that generality issue is involved here .... yours nirs;) good fellow shilonir
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When in Dialog the easier way

Sudip

22 Aug '01 - 2:49

1

just have a combobox & an edit control in your dialog template and make them NOT visible. In the OnInitDialog set the parent of both edit and the combo to the ListCtrl. Now on NM_CLICK event of the list control do the setwindowpos of combo box and edit box. Simple is'nt it... Sudip
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An editable combo list control

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First Posted	19 Aug 2001
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