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How to implement a scrollable child dialog

, 11 May 2003
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How to implement a scrollable child dialog

Sample Image - ScrollableChildDialog.jpg

Introduction

Many times it happened to me (and I hope to you too!) the need for a kind of child dialog, to use as a control inside a more bigger dialog or window or view etc. Filling this child dialog of controls is easy. Set the size of it to fit inside the parent window is not so easy. So, here is the scrollable child dialog, which i found veeeeery useful in my applications.

The code

The code is really simple and is strongly based on the MSDN article HOWTO: Create a Resizable Dialog Box with Scroll Bars (Q262954). I simply created the scrollable dialog template choosing the WS_CHILD and WS_VSCROLL styles and used class wizard to add WM_SIZE, WM_MOUSEWHEEL and WM_VSCROLL messages. To use the code in your project follow these steps:

  1. Add dlgscrollable.h and dlgscrollable.cpp to your project
  2. Create your own dialog resource template and replace the resource identifier in the header file
  3. In the parent window, add a member variable like CDlgScrollable* m_pdlgScrollable and in the OnInitDialog function, create the new CDlgScrollable object.
  4. In the parent dialog resource template, you can use a static as a placeholder to calc the rectangle of my scrollable child control.
  5. You can easily change the "hand" cursors, loading different resources as needed

It's obviously really simple add support for horizontal scroll, it's symmetric and I didn't really need that... :P

And so...

That's all! I'm sorry for my bad English (I'm Italian), this is my first article. Hope not my last one! Thanx to DD and GM for their suggestions and comments, this is the last version of the code, or at least the last version for the next two months! Have fun!

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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About the Author

Massimiliano Conte
Software Developer (Senior) Selex ES
Italy Italy
Hi Smile | :)
I was born in 1970 (Augusta - Italy).
I live in Taranto - Italy.
I work in Taranto - Italy.
I like computer science!!!
That's all!

Comments and Discussions

 
GeneralExplanation of some magic numbers PinmemberBati92-Dec-08 10:50 
GeneralRe: Explanation of some magic numbers PinmemberMassimiliano Conte2-Dec-08 20:57 
QuestionEvent handling in the parent Dialog? PinmemberSeife13-Sep-07 3:59 
Questionpb when using your code !!! [modified] Pinmemberaabdoos15-Dec-06 1:43 
QuestionIDC_PLACEHOLDER what's it? Pinmembertlbf10-Nov-06 2:16 
AnswerRe: IDC_PLACEHOLDER what's it? PinmemberJonathanLivingstone10-Nov-06 3:02 
QuestionCenter dialog on startup? Pinmemberrturrentine25-May-05 6:03 
GeneralSome notes and adjustements PinmemberDavide Zaccanti27-Mar-05 20:32 
GeneralGreat but... Pinmemberpgiustinoni28-Feb-05 14:01 
GeneralResizing original dialog Pinmemberandrew_lowry15-Apr-04 3:50 
Generalfix for embedded visual c++ 4.0 PinmemberSpellcaster14-Mar-04 7:42 
QuestionHow can I implement this for a Dialog and not a for a child of a Dialog? PinmemberDanYELL8-Feb-04 7:54 
AnswerRe: How can I implement this for a Dialog and not a for a child of a Dialog? PinmemberJonathanLivingstone8-Feb-04 22:46 
QuestionHow can I get this to work with a CFormView? PinmemberDanYELL6-Feb-04 6:05 
GeneralTab Key and Scroll Dialog box PinsussAnonymous28-Jan-04 22:10 
Generalscrollbar position on start Pinmemberteamghost16-Oct-03 1:47 
Generalit helped me Pinmembersanskypotov3-Sep-03 0:01 
GeneralRe: it helped me PinmemberNiFF21-Jun-05 6:07 
GeneralExact same problem as Keith Pinmemberyklam15-Jul-03 5:00 
GeneralSolution Found Pinmemberyklam21-Jul-03 4:50 
QuestionHow to use this powerful class in embedded visual c++ 3.0? Pinmemberkeithse26-Jun-03 11:38 
Hi John,
I really think this class is valuable, however I failed to port this code to embedded visual c++ 3.0. First of all, it give me error when compiling, saying there is no OnMouseWheel command, so I comment out this definition and implementation. Then, when I start my sample app in PocketPC 2002 emulator, i can see my child dialog in place, but it doesn't respond to the scrollbar.
 
Can you help?
 
Best Regards,
Keith
AnswerRe: How to use this powerful class in embedded visual c++ 3.0? PinmemberKaiserle21-Jul-03 3:44 
GeneralMousewheel does not work. PinmemberBrian van der Beek22-May-03 5:08 
GeneralRe: Mousewheel does not work. PinmemberJonathanLivingstone23-May-03 1:40 
GeneralRe: Mousewheel does not work. Pinmembersonu_22413-Aug-07 1:50 

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