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Doug Herr



Joined: 19 Sep 2010
Posts: 14
Location: Sacramento
Doug Herr
Apologies if this is an elementary question, Windows isn't my first or favorite language. I have an edit item in my resource list which is initially visible

dialogitem 'EDIT','?', MC_PRODUCTTYPE, EDITBOXX,TYPY,TEXTEDITFIELDWIDTH,12, WS_VISIBLE or WS_BORDER or WS_TABSTOP, 0

and depending on user input I want to make this edit input invisible. How do I do this?

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Doug Herr
Sacramento
http://www.wildlightphoto.com
Post 12 Mar 2014, 17:26
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AsmGuru62



Joined: 28 Jan 2004
Posts: 1409
Location: Toronto, Canada
AsmGuru62
You need to respond to EN_CHANGE notification in your dialog box procedure.
I do not see however, how will you make it back to visible?
Because once it is invisible - you cannot edit it.
Post 12 Mar 2014, 18:21
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Doug Herr



Joined: 19 Sep 2010
Posts: 14
Location: Sacramento
Doug Herr
A separate checkbox determines whether the edit item is needed or not,

i.e., checkbox checked -> edit item invisible and editing not necessary
checkbox not checked -> edit item visible & editable
Post 12 Mar 2014, 18:26
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Doug Herr



Joined: 19 Sep 2010
Posts: 14
Location: Sacramento
Doug Herr
I'm guessing there's a message I can send (SendMessage) that will make the item visible or invisible, but what message and with what parameters? A few hours searching MSDN did nothing but cure insomnia.
Post 12 Mar 2014, 20:21
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baldr



Joined: 19 Mar 2008
Posts: 1651
baldr
Doug Herr,

Try setting window style of that control (beware of making current control invisible). Disabling works the same way.
Post 12 Mar 2014, 20:38
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JohnFound



Joined: 16 Jun 2003
Posts: 3500
Location: Bulgaria
JohnFound
Code:
invoke ShowWindow, [.win_handle], SW_SHOWNORMAL
invoke ShowWindow, [.win_handle], SW_HIDE

; You can find the dialog box control handle by calling:

invoke GetDlgItem, [.dialog_handle], .control_ID    
Post 12 Mar 2014, 20:58
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Doug Herr



Joined: 19 Sep 2010
Posts: 14
Location: Sacramento
Doug Herr
JohnFound wrote:
Code:
invoke ShowWindow, [.win_handle], SW_SHOWNORMAL
invoke ShowWindow, [.win_handle], SW_HIDE

; You can find the dialog box control handle by calling:

invoke GetDlgItem, [.dialog_handle], .control_ID    


Nope, the edit item and the checkbox are in the same dialog box

baldr wrote:
Doug Herr,

Try setting window style of that control (beware of making current control invisible). Disabling works the same way.


Can you show me an example?

Or do I need to destroy the entire dialog box & re-display with or without the edit item?

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Doug Herr
Sacramento
http://www.wildlightphoto.com
Post 12 Mar 2014, 21:08
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JohnFound



Joined: 16 Jun 2003
Posts: 3500
Location: Bulgaria
JohnFound
1. Process the WM_COMMAND message of the dialog box. You will get one for every click on the check box. Identify the check box by the control ID, passed in the low word of .wparam.

2. If the click is on the check box, read the check box state by sending message BM_GETCHECK. Invert it and use BM_SETCHECK to set the new state of the checkbox.

3. Get the edit box handle by "invoke GetDlgItem, [.dlg], idEdit" - the result handle is in EAX.

4. If the checkbox is checked, call: "invoke ShowWindow, eax, SW_SHOWNORMAL". If not: "invoke ShowWindow, eax, SW_HIDE".

5. that is all...

Similar code, used in one of my programs (it enables/disables the edit control insted of hiding/showing, but the idea should be clear):
Code:
.wm_command:
        cmp     word [.wparam], idAutoHideCheck   ; the checkbox ID is idAutoHideCheck
        jne     .ondefault

        cmp     word [.wparam+2], BN_CLICKED  ; the checkbox has been clicked.
        jne     .ondefault

        invoke  SendDlgItemMessageA, [.hwnd], idAutoHideCheck, BM_GETCHECK, 0, 0
        mov     ebx, eax
        xor     ebx, 1
        invoke  SendDlgItemMessageA, [.hwnd], idAutoHideCheck, BM_SETCHECK, ebx, 0

        invoke  GetDlgItem, [.hwnd], idAutoHideTime   ; idAutoHideTime is the ID of the edit control.
        invoke  EnableWindow, eax, ebx    
Post 12 Mar 2014, 21:30
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Doug Herr



Joined: 19 Sep 2010
Posts: 14
Location: Sacramento
Doug Herr
Thanks JohnFound, I'll give that a try.

EDIT: I got it working & it's just what I wanted, thanks again.
Post 12 Mar 2014, 21:42
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