Anyother way to get the selected index or capture mouse click event in a CLISTBOX ?

Question

4.00/5 (1 vote)

See more:

This listbox is a control on another dialog.

ListBox Definition:
LISTBOX IDC_LNGNAMEBOX,205,21,190,131,WS_VSCROLL | WS_HSCROLL |
ES_AUTOHSCROLL | WS_TABSTOP | LBS_NOTIFY | LBS_NOINTEGRALHEIGHT | LBS_MULTIPLESEL

DataExchange:
CListBox m_LngNameList;
DDX_Control(pDX, IDC_LNGNAMEBOX, m_LngNameList);

MessageMap:
ON_LBN_SELCHANGE(IDC_LNGNAMEBOX, OnSelChangedLNGBox)
ON_LBN_DBLCLK(IDC_LNGNAMEBOX, OnMouseDBClick)

Scenario:
In a multiple selection listbox, when we click on any selected item, the selection goes of. I want to make the selection to stay always once the user clicks it (atleast any one item selected always).

Mysolution:
Whenever the selection changes if the item is already selected then select it again. I have done this is the "OnSelChangedLNGBOX" function.

Problem:
ON_LBN_SELCHANGE is called when we click an item and release the mouse (OnMouseUp). So the problem is when user clicks on item and holds it, the item is unselected and i am selecting back it again in OnSelChangedLNGBox. This is annoying, it looks like item is flickering, and also it doesn't seem to be consistent with windows. In windows if you open any folder with many documents if you click on an already selected document on mouse down the document still stays selected, but my item is unselected.

Question?
How can i solve this? I am trying to capture the PreTranslateMessage

if (pMsg->message == WM_LBUTTONDOWN)
{
    SelectedItem = m_LngNameList.GetAnchorIndex();
}

But here selected item is not the correct one, it is not the same as the one i am getting in ON_LBN_SELCHANGE. Help please?

Posted 14-Jun-11 7:57am

amarasat

Updated 14-Jun-11 10:03am

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Niklas L · Answer 1 · 2011-06-14T08:15:00

Solution 1

Have a look at this Codeproject article[^] discussing the different modes of selection; Single, Multiple and Extended. The article is old, but still valid.

Posted 14-Jun-11 8:15am

Niklas L

Comments

amarasat 14-Jun-11 14:53pm

i have already looked at this article, it has everything except LBS_WANTKEYBOARDINPUT
or VKeyToItem message examples. These are the thing i want exactly. Like i have already tried by adding LBS_WANTKEYBOARDINPUT to my ListBox styles and when i defined the function

int CGenerationDlg::VKeyToItem(UINT nKey, UINT nIndex) , i am getting error VKeyToItem is not a member of CGenerationDlg. Still searching how to declare that function.

amarasat 14-Jun-11 16:02pm

I was wrong this is not what i want, i implemented LBS_WANTKEYBOARDINPUT, it only captures events on a list box item from keyboard, but not a mouse click event.

I still need to know how to capture the mouse click event on a listbox item, is so how to get the index of the item that is selected or about to be selected. suggestions please