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
Solved

Hi-liting/Shading a string in a CListBox?

Posted on 1998-05-05
7
249 Views
Last Modified: 2013-11-20
I have derived a class from CListBox and made it owner draw.  I have also updated the DrawItem() function to draw the strings that are added to the list box.  Now my problem is, once the user double-clicks on the string I'd like to have it remain shaded gray.  How do I do this? Help!
0
Comment
Question by:tdubroff
  • 3
  • 3
7 Comments
 
LVL 15

Expert Comment

by:Tommy Hui
ID: 1307627
What exactly do you mean by remain shaded gray? Do you mean as if it wasn't selected? Or if it is selected?

Regardless, the code you have for owner-draw determines exactly how the items are to be displayed. I suspect you probably have code in there to check if the state is selected or focused and to draw something different. One of those can be combined to achieve the effect you want.

For example, if you want it to appear selected whether the listbox has focus or not, then remove the check for the focused state because that is no longer needed.

Note that you can also change the selected state of the item when the user double clicks on it. If you don't want it to be selected after double clicking, then add the code to turn off the selection.
0
 
LVL 2

Author Comment

by:tdubroff
ID: 1307628
I have a list box that is filled with several strings.  Once the user double-clicks on each item, then that item gets selected and is displayed with a blue background.  When the user selects a different item, then I want the original item to be displayed with a gray background (meaning that it has been selected before).
0
 
LVL 10

Accepted Solution

by:
RONSLOW earned 60 total points
ID: 1307629
OK .. in your derived class, associate some data with each listbox entry.  This data will (include) a flag to say "I have been selected".  In your owner-draw code, look at the associated data for the item you are drawing and set the colours appropriately.

Check out the source code for the MFC class CCheckListBox which uses an ownerdran listbox to show (and respond to) a check box on each line.  This also associates a flag with each item for its check state and draws the checkbox accordingly.

0
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

 
LVL 2

Author Comment

by:tdubroff
ID: 1307630
Thanks RONSLOW.  Once again I have gotten something working using your suggestions.  However my problem is not quite done.  The user can if he/she wants press a button which will un-gray all grayed items.  The question is then, how do I cause a refresh of the list box (how do I force DrawItem to be called)?  
0
 
LVL 10

Expert Comment

by:RONSLOW
ID: 1307631
Invalidate() it.

0
 
LVL 2

Author Comment

by:tdubroff
ID: 1307632
Thanks a bunch!
0
 
LVL 10

Expert Comment

by:RONSLOW
ID: 1307633
Don't you just love two-word answers - short and to the point :-).

Glad I could help !!
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

Suggested Solutions

Introduction: Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers.  The PreTranslateMessage function is to be used to intercept and respond to keyboard events. Continuing from the fourth article about sudoku. …
Introduction: Dialogs (1) modal - maintaining the database. Continuing from the ninth article about sudoku.   You might have heard of modal and modeless dialogs.  Here with this Sudoku application will we use one of each type: a modal dialog …
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.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

790 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