Solved

How to determin which component triggered an event?

Posted on 2002-04-05
3
188 Views
Last Modified: 2010-04-02
I am working on my first windows project in Borland C++ and I can't seem to figure this out:

I need to have an array of components, or some way of quickly stepping through each one so I can duplicate the values, I chose an array.

I define my componenets:

TCheckBox ListBox[MAX_ITEMS];
 
for (count=0;count<MAX_ITEMS;count++) {
     ListBox[count] = new TCheckBox(this);
     ListBox[count].Top = 35;
     ListBox[count].Tag = count;
     // other properties and stuff ...
     ListBox[count].OnClick = &EntryDuplicate;
}

My question is how can I access the properties of the
TCheckBox componenet that triggered the event from the event?

Thanks in advance.
0
Comment
Question by:philtwo
  • 2
3 Comments
 
LVL 6

Accepted Solution

by:
thienpnguyen earned 300 total points
ID: 6921443
void __fastcall TForm1::EntryDuplicate(TObject *Sender)
{
    // assume, you click on your TListBox
    TListBox *listbox = (TListBox *) Sender;
    listbox->Top = 10;
    //....

}
0
 
LVL 6

Expert Comment

by:thienpnguyen
ID: 6921461
Other way,

void __fastcall TForm1::EntryDuplicate(TObject *Sender)
{
   TListBox *listbox = dynamic_cast<TListBox*>( Sender );
   if( listbox != NULL )
   {
       listbox->Top = 10;
        //....
   }

}
0
 

Author Comment

by:philtwo
ID: 6921921
Asbolute life saver - thanks alot!!
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.

895 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

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now