Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Combo box with dual value list.

Posted on 1998-08-12
1
Medium Priority
?
263 Views
Last Modified: 2013-11-20
Hi

I need to implement a combo box derived class which can support a pair of lists (values) to be shown
when it is clicked  upon.  Which of the the list from a pair is shown is to be controlled by a flag.  

For e.g. Say the first list contains entries like USA, UK, Russia, Germany, France.
(When you expand combo box you will see each of the five countries as separate possible value.)
Second list will contain values like USA, UK, Russia, Germany, France, India, Pakistan, China.
First list will always be subset of the second list.

Which of the two value shows up is simply controlled by boolean flag.
If flag set to True, it  will show the first list in the pop up box else it will show the second list set.

I want to avoid having to maintain two pairs of list and changing the combo box contents everytime.
Among other things it might screw up other part of code that depend upon the index/position of value
on the list.

0
Comment
Question by:SamratAshok
1 Comment
 

Accepted Solution

by:
lsean earned 200 total points
ID: 1320694
1) Derive a class from CComboBox, add a member variable of type CStringArray to contain those strings in the second list but not in the first list. Add another member varible of type BOOL to represent the flag you mentioned.

2) After the combobox is created, insert the first list into the combobox, and insert the second list into the CStringArray varible.  Initialize the flag to FALSE.

3) Add a member function AddExtraStrings() that inserts strings in the CStringArray member varible into the combobox.  Add another function RemoveExtraStrings() to delete strings in the CStringArray member varible from the combobox.

4) Whenever the flag changes to TRUE, call the AddExtraStrings() function. Whenever it changes to FALSE, call the RemoveExtraStrings() function.

5) Don't use the "sort" style if the order of strings in the combobox is important to you.

0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

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

Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
In this post we will learn different types of Android Layout and some basics of an Android App.
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.
Integration Management Part 2

972 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