Resources vs Classes

Posted on 2000-04-14
Last Modified: 2013-11-20
When a new secondary resource is added, like Menu, Toolbar etc., ClassWizard asks which class to belong this resource to. Whatever I answer, I can see the IDs of that resource in every classes in the ClassWizard. So, what does it matter which class "owns" the resource? And what happens if I add to different functions to respond to the same ID in two different classes?
Question by:Lescha
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Expert Comment

ID: 2715896
Mainframe class

You can also write handlers to them in the view class or classes.

If multiple views are present and you write handler to one view this is unavailable for all the other views.

but if it is in mainframe it is always available whatever view is active through the mainframe class

Author Comment

ID: 2715935
Sorry... could you clarify yourself a bit? I didn't quite get the answer. ;-(

And I didn't talk just about SDI/MDI, I was talking in general!

Expert Comment

ID: 2716430
The reason that a resource is 'owned by a class' is so that class becomes the default for member variables and events that are assigned.  However you can assign events and the like to any class.  If you assign different events to the same id, then the first one to get the message handles it.  For example, all dialogs use a button click event frmo IDOK to ok the dialog.  If Dialog1 opens Dialog2 modally, clicking on the OK button sends a button click message with the ID IDOK to the topmost window, so dialog2 handles it, even though dialog1 also has a handler for the same event.
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Author Comment

ID: 2717214
Yes, but what happens if I have to unmodal dialogs... oh, I get it. You mean, the one that has the function AND the focus handles the message?

Author Comment

ID: 2717227
..I meant, "TWO unmodal dialogs", of course! ;)

Expert Comment

ID: 2721790
Yes, the way windows works is when it posts a message, the window with the highest z order (i.e. the one with focus) gets the message first, then it gets passed down the z order.  If the topmost window has the correct handler then it will process the message.  If not, it posts it on to the next window.  In the case of events like button clicks, the window in focus will get the event, whether it is modal or unmodal.

Author Comment

ID: 2724012
uh-huh... thanks, "ch52jb". Please lock the answer.

Accepted Solution

ch52jb earned 20 total points
ID: 2725633
Tis locked.

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