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OrbWorks Community Forum • View topic - enable a disabled button

enable a disabled button

Discuss PocketC for CE (including Desktop Edition)

Postby charlotte on Sat Sep 14, 2002 4:09 am

Hello,
I am new in using PocketC, even new in C.
I use version 3.01 ( I think this is the current version) on a Jornada 720.
I created a disabled button by:
#define ID_BtnOpen 100
createctrl ("BUTTON", "Open", WS_CHILD|WS_VISIBLE|WS_DISABLED, 0, 10, 60, 75, 25, ID_BtnOpen);

How can I change the state of this control in Enabled?

Help will be much appreciated.
---------------------------------------------------------------
I think I found the solution.
I give the code here for others with the same problem.

#include "/PocketC/pcheader.h"
#include "/PocketC/winuser.h"

#define ID_BtnOpen 100
HWND H_BtnOpen;

createctrl ("BUTTON", "Open", WS_CHILD|WS_VISIBLE|WS_DISABLED, 0, 10, 60, 75, 25, ID_BtnOpen);
H_BtnOpen = gethwnd (ID_BtnOpen);

EnableWindow (H_BtnOpen, 0); // Disable
EnableWindow (H_BtnOpen, 1); // Enable
charlotte
 
Posts: 3
Joined: Sat Sep 14, 2002 4:02 am

Postby guy on Sun Sep 15, 2002 9:58 am

I should mention that in order for this to work you need to install the CE API interface library for PocketC (link in sig below), and ensure that any users of your program have installed the runtime component of the library, or that you distribute the runtime part for all target platforms with your app.

CEAPI is free for developers and end users (I must be mad).


Guy
[url]mailto:pcform@pcform.net[/url]
http://www.pcform.net
PocketC CE API interface: http://www.networkdynamics.net/PCForm.html#library
PCForm and CE API forum: http://www.networkdynamics.net/forum
Guy
[url]mailto:pcform@pcform.net[/url]
http://www.pcform.net
PocketC CE API interface: http://www.networkdynamics.net/PCForm.html#library
PCForm and CE API forum: http://www.networkdynamics.net/forum
guy
 
Posts: 879
Joined: Thu Dec 07, 2000 8:58 am
Location: United Kingdom

Postby joh.becker on Mon Sep 16, 2002 5:47 am

I am using wndshow(int handle, int flag) to show / hide buttons. It may work to disable / enable as well (but have not tried it yet). The docu says that other vlues that hide/show are possible.

Johannes
joh.becker
 
Posts: 86
Joined: Tue Apr 17, 2001 6:51 am
Location: Germany

Postby guy on Mon Sep 16, 2002 7:40 am

wndshow(), and its underlying real API function ShowWindow(), can't enable and disable windows. The API function EnableWindow() does that. PocketC doesn't provide a wrapper for EnableWindow() in its standard library.

The alternative is to create two versions of a control, one enabled and one disabled, and swap them around by showing the one you want and hiding the other one. You have to remember to copy the content of the enabled one to the disabled one if it changes.


Guy
[url]mailto:pcform@pcform.net[/url]
http://www.pcform.net
PocketC CE API interface: http://www.networkdynamics.net/PCForm.html#library
PCForm and CE API forum: http://www.networkdynamics.net/forum
Guy
[url]mailto:pcform@pcform.net[/url]
http://www.pcform.net
PocketC CE API interface: http://www.networkdynamics.net/PCForm.html#library
PCForm and CE API forum: http://www.networkdynamics.net/forum
guy
 
Posts: 879
Joined: Thu Dec 07, 2000 8:58 am
Location: United Kingdom


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