?
Solved

dynamically change background color for certain cells in the CListCtrl using report style

Posted on 2008-10-23
2
Medium Priority
?
1,616 Views
Last Modified: 2013-11-20
I use CListCtrl with report style to list some text with grids.
I would like to change the background color for some cells.
For example, if the user push button A, the background for the cell at row 3 and col 4 will be changed to yellow. And if the user push button B, the the background for the cell at row 3 and col 4 will be changed to red. I have been searched the internet for good solutions but they are all too complicated for me. Currently, I use CustomDraw below. However, it will change the background clolor for the "whole" row, which is not what I really want. In the code, indexVector is an vector variable in the Mydialog object used for indicating which row needs to change the background.
I would like to have a function that I can pass in the row and col and it change the background for that cell for me in the CListCtrl.
Thanks very much for any comments.

void Mydialog::OnCustomDrawList(NMHDR* pNMHDR, LRESULT* pResult) 
{
	//SAMPLE: for this notification, the structure is actually a
	// NMLVCUSTOMDRAW that tells you what's going on with the custom
	// draw action. So, we'll need to cast the generic pNMHDR pointer.
	LPNMLVCUSTOMDRAW  lplvcd = (LPNMLVCUSTOMDRAW)pNMHDR;
	//SAMPLE: The first notification we'll receive is CDDS_PREPAINT,
	// right at the beginning of the paint cycle. We'll want to return
	// item-specific notifications so we can deal with things the right
	// way.
	if (lplvcd->nmcd.dwDrawStage == CDDS_PREPAINT)
	{
		*pResult = CDRF_NOTIFYITEMDRAW;
	}
	// otherwise, we might be really getting a notification about
	// painting something.
	else if (lplvcd->nmcd.dwDrawStage == CDDS_ITEMPREPAINT)
	// Because we returned CDRF_NOTIFYITEMDRAW in response to
    // CDDS_PREPAINT, CDDS_ITEMPREPAINT is sent when the control is
    // about to paint an item.
	{
		if (indexVector.at(lplvcd->nmcd.dwItemSpec) == 1 )
		{
            lplvcd->clrText = RGB(255, 0, 0);
            lplvcd->clrTextBk = RGB(0, 255, 255);
            *pResult = CDRF_NEWFONT;
		}
		else
		{
		// no change; tell the control to do the default
			*pResult = CDRF_DODEFAULT;
        }
	}
	else
	{
		*pResult = 0;
	}
}

Open in new window

0
Comment
Question by:lily1102
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 3

Accepted Solution

by:
Naveen_R earned 2000 total points
ID: 22793163
Currently in your code, you are handling CDDS_ITEMPREPAINT to draw the entrie row. But if you return CDRF_NOTIFYSUBITEMDRAW as a response to the CDDS_ITEMPREPAINT , the custome draw will get called before each column is draw. Below is the sample code. try it.
void Mydialog::OnCustomdraw(NMHDR* pNMHDR, LRESULT* pResult)
{
    NMLVCUSTOMDRAW* pLVCD = reinterpret_cast<NMLVCUSTOMDRAW*>(pNMHDR);
    *pResult = CDRF_DODEFAULT;
    if ( CDDS_PREPAINT == pLVCD->nmcd.dwDrawStage )	
    {
        *pResult = CDRF_NOTIFYITEMDRAW;
    }
    else if (pLVCD->nmcd.dwDrawStage == CDDS_ITEMPREPAINT )
    {
         *pResult = CDRF_NOTIFYSUBITEMDRAW;
    }
    else if (pLVCD->nmcd.dwDrawStage == (CDDS_ITEMPREPAINT | CDDS_SUBITEM))	
    {
        if( indexVector.at(pLVCD->nmcd.dwItemSpec) == 1 && 
            ( pLVCD->iSubItem == 3 || pLVCD->iSubItem == 4 ))
        {
          // All conditions met, chnage the color
           pLVCD->clrTextBk = RGB(0, 255, 255);
           pLVCD->clrText = RGB(255, 0, 0);
        }
        else
        {
           // Default color
           pLVCD->clrTextBk = RGB(255,255,255);
           pLVCD->clrText = RGB(0,0,0);
        }
    }
}

Open in new window

0
 

Author Closing Comment

by:lily1102
ID: 31509327
Thanks so much for the wonderful solution that you provided. Super!!
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article, I'll describe -- and show pictures of -- some of the significant additions that have been made available to programmers in the MFC Feature Pack for Visual C++ 2008.  These same feature are in the MFC libraries that come with Visual …
Introduction: The undo support, implementing a stack. Continuing from the eigth article about sudoku.   We need a mechanism to keep track of the digits entered so as to implement an undo mechanism.  This should be a ‘Last In First Out’ collec…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …
Suggested Courses

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question