[openbeos] BTextControl Question

From: "Travis Beaty" <travis_beaty@xxxxxxxxxxxxx>
To: openbeos@xxxxxxxxxxxxx
Date: Tue, 29 Jan 2002 20:46:16 -0700
Hello All!

I'm a newbie BeOS programmer (well, actually, OBOS programmer now!), and I'm 
also fairly new to 
programming in C++.

As a "starter" project for learning BeOS programming, I've decided to create a 
Polish notation calculator.  Part 
of this calculator consists of four "banks," which hold values to be 
manipulated by the calculator.  The bottom 
bank, "W," should be editable, so that the user can enter values (like a normal 
calculator).  The remainder of 
the banks may not be edited by the user.

I've decided to implement the bank displays with BTextControls.  In Windows 
(sorry I'm being obscene on the 
list, hehehe), I'd like to give the text controls the ES_READONLY flag.  This 
is how I've tried to do it in my code, 
using BTextView :: MakeEditable():

// START OF CODE

BTextControl 
    *bank_display[4];        
// (A field within the parent window's class).

// Excerpts from the parent window's class constructor ...

// labels for the bank displays.
const char
   bank_lbl[4][3] = {"Z:", "Y:", "X:", "W:"};  

// Location of next bank display control and reset button.
BRect
    bank_rect(5, 28, 155, 20),  
    button_rect(160, 25, 220, 20);

// ...

for(int i = 0; i < 4; i++) {

    // Build a bank display TextControl and initialize it.
    bank_display[i] = new BTextControl(
        bank_rect, NULL, bank_lbl[i], "Hello!", new BMessage(-1),
        B_FOLLOW_LEFT | B_FOLLOW_TOP, B_WILL_DRAW | B_NAVIGABLE);
    
    bank_display[i]->SetDivider(20);
    bank_display[i]->SetAlignment(B_ALIGN_LEFT, B_ALIGN_RIGHT);
    if(i != 3) bank_display[i]->TextView()->MakeEditable(false);

    // Increment the top and bottom members of bank_rect to set the 
    // values up for the next control.
    bank_rect.top += 25;
    bank_rect.bottom += 25;

}

(Sorry if the formatting is messed up ... I have a bad problem with my code 
getting scrambled somewhere 
between my computer and your computer.)

Unfortunately, when running the application, all text controls are still 
editable, and the call to MakeEditable() 
does not appear to have any affect.  However, the calls to SetDivider() and 
SetAlignment() appear to work as 
advertised.  This is either due to my lack of knowledge concerning the BeOS 
API, my lack of knowledge 
concerning C++, or a hideous combination of the two.

Any help would be greatly appreciated.

Travis Beaty
Evans, Colorado.
[openbeos] BTextControl Question

Other related posts:
