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Adding progress bars to a list control

Jinhyuck Jung

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3.89/5 (14 votes)

2 Sep 2001

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A simple extension that allows you to add a progress indicator as an item in a list control

Download demo project - 36 Kb

Introduction

This code shows how to add a progress control to a listview control. If you want to use this code, copy listctrlex.h and listctrlex.cpp to your project and subclass it.

These files are good examples of owner-draw control and custom draw list controls. if you want to visually show various data in your listview controls (such as progress, which is done here), you'll need these.

There is another way to show a progress control in a listview control - that is embedding progress bar control in your listview control. For this case that isn't necessary because the code presented here works properly and I don't want to worry about processing child window's messages.

I implemented and tested on Windows 2000 Proffesional, Visual C++ 6.0 with Service Pack 5. Untested under Unicode.

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.

A list of licenses authors might use can be found here

Written By

Jinhyuck Jung

Korea (Republic of)

This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions

I hope this earns me some brownie points on this site. Because no one has emailed me here is the solution:

1) Create a listview (not ownerdrawn)
2) Override the paint function using the code below

void CMyListView::OnPaint()
{
//CPaintDC dc(this); // device context for painting

CListCtrl & List = GetListCtrl();
CHeaderCtrl * pHeader = List.GetHeaderCtrl();

//Get the item rectangle for the subitem
// nProgress = column to draw progress control
CRect rectItem;
List.GetSubItemRect( 0, nProgress, LVIR_BOUNDS, rectItem );

//Get the client rectangle for finding the bottom of the column
CRect rectClient;
GetClientRect( rectClient );

//get the header rectangle so we know the update rectangle
CRect rectHeader;
pHeader->GetClientRect( rectHeader );

//readjust the item rect to equal the column rectangle
rectItem.top = rectHeader.bottom;
rectItem.bottom = rectClient.bottom;

//validate the region this will exclude the region during the
// OnPaint virtual call
ValidateRect( rectItem );

//////////////
// Draw progress controls here
// *Do not use paintdc (it validates the whole client)
CClientDC dc(this);

//get the item rect
int nDrawIndex = List.GetTopIndex();
for ( int nIndex = 0;
nIndex < List.GetCountPerPage();
nIndex++ )
{
//Draw item -> nDrawIndex
nDrawIndex++;
}

CListView::OnPaint();
}
OMG | :OMG:

OMG | :OMG:

OMG | :OMG:

OMG | :OMG:

OMG | :OMG:

There it is! Now you know how to really draw a progress control!! And a new trick that will complement your other programming.

Roll eyes | :rolleyes:

Roll eyes | :rolleyes:

-Mike Luongo

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