Show or hide row of clistctrl

Question

0.00/5 (No votes)

See more:

Hello, everyone!
I need something for listctrl.
I want to put a check box in listctrl and decide whether to display or hide each row depending on whether or not the check box is checked.
Do you have a library with the appropriate functions?
If not, how would you like it to be implemented?
My idea was to set the height of the line to zero, but I don't even know how to change the height of each line.

What I have tried:

void RkwDListCtrl::OnItemChangeEvent(NMHDR* pNMHDR, LRESULT* pResult)
{
	LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);



	if (pNMLV->uChanged == LVIF_STATE && flag)
	{

		
		UINT nOldCheck = pNMLV->uOldState & LVIS_STATEIMAGEMASK;
		UINT nNewCheck = pNMLV->uNewState & LVIS_STATEIMAGEMASK;
		if (nOldCheck && nNewCheck && nOldCheck != nNewCheck)
		{

			BOOL bCheck = this->GetCheck(pNMLV->iItem);

			if (bCheck) {
				this->SetItemText(pNMLV->iItem, 14, "1");
			}
			else {
				this->SetItemText(pNMLV->iItem, 14, "");
			}

		}
	}

	*pResult = 0;
}

Posted 17-Nov-21 14:12pm

Member 15411873

Updated 17-Nov-21 15:58pm

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)

Rick York · Answer 1 · 2021-11-17T15:58:00

I do not think changing the height will work. The main reason is I think you would have to draw each line yourself. I think the best way depends on how (and if) you are storing the data. If you have all the data in some sort of collection then it is simple to just delete rows that are not visible and you can always restore them if you need to. That is actually the most important point - do you need to put and items back in the last to be displayed? If not then you can just remove any selected lines from the list control by calling DeleteItem. If you will need to restore any data then you will have to save it somewhere when it is removed from the control.