How to pass child notifications to main window?

Question

1.00/5 (1 vote)

See more:

Hello everyone!

I would like to start by saying thanks to everyone who takes some time to view this thread and try to help.

I have a main window, with a child static control ( for further discussion we shall label it as S1 ). That static control is parent to another static control ( for further discussion we shall label it as S2 ).

Both static controls have SS_NOTIFY style set, and need to do something when user clicks on them.

I have no problem catching notification message from first control ( S1 ) since it sends its messages to parent, in this case main window.

However, I don't know how to catch child static control's ( S2 ) notifications in main window.

Is it possible to do this?

Or do I need to subclass something? Maybe parent static control ( S1 )?

I work in MS Visual Studio Express 2008, on Windows XP, in C++, using WIN32 API.

If any other information is required ( source code or something similar ), please ask for it, I will more than gladly supply it.

Posted 14-May-13 8:01am

MyOldAccount

Add a Solution

Comments

Richard MacCutchan 14-May-13 15:07pm

I have not tried this myself, but I assume that the notifications are sent to S1, so you need to catch them there, probably by subclassing.

MyOldAccount 14-May-13 15:40pm

Can you offer some pseudo-code/code/written instructions?
I have never done subclassing before...
Thank you.

Richard MacCutchan 14-May-13 17:00pm

I'm afraid I don't have anything that I can offer at the moment. I suggest you take a look at the subclassing section on MSDN. The basic idea is that you add your own window procedure into the chain for the control in question, which allows you to see all the messages/notifications for that control. All you need to do in your code is process the messages you are interested in, and pass the rest down to the control.

MyOldAccount 14-May-13 19:07pm

I have stumbled upon that article too!
I will give it a try, and report my results.

3 solutions

Solution 1

Use Spy++ to catch the messages going to your windows. This tool will give a you an inside view where the messages are going and will give you insight into how to catch them.

Posted 14-May-13 9:09am

JackDingler

Comments

MyOldAccount 14-May-13 15:48pm

I don't have original Visual Studio, I use Express Edition, and I was unable to find Spy++.

However, it is pretty logical that messages go to the parent ( why would'n they? ) which is S1.

I guess I need to subclass it, but I don't know how.

I would welcome some code examples/pseudo-code/links...

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Kucera Jan · Accepted Answer · 2013-05-14T21:11:00

Hi,

actually I think that if the parent of S2 is S1, the main windiiw shall not receive the notification from S2. Instead, S1 shall receive the notification from S2.

Which meanse that:
- S1 sends its notification to its parent, which is MainWindow
- S2 sends its notification to its parent, which is S2

If you wand to catch notification from S2 in MainWnd as well, you shall perhaps use redirect them by e.g. subclassing S2.

Hope this helps

Best regards,
J. K.

MyOldAccount · Accepted Answer · 2013-05-15T09:26:00

I have solved it!

I have subclassed S1, and it works like a charm!

Example that helped was from Richard Simon's book " Windows NT Win32 API SuperBible ".

For those with similar problem, just check out description of function CallWindowProc() in his book, and at the very bottom you will find a simple example.

How to pass child notifications to main window?

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0