On Tue, 22 Nov 2005, Daniel Allsopp wrote:
> I've got a couple of questions regarding CustomClasses and MUIA_Window_Open.
> I am coding with the latest beta of OS4 and compiling using GCC 3.4.4.
>
> When a window (custom class) is requested open for the first time in my
> application I do the following:
>
> ctc_Node->node_window = (Object*)NewObject(MCC_Message->mcc_Class, NULL,
> TAG_DONE);
> if(ctc_Node->node_window)
> {
> DoMethod(app, OM_ADDMEMBER, ctc_Node->node_window);
> DoMethod(ctc_Node->node_window, MUIM_Notify,
> MUIA_Window_CloseRequest, TRUE,
> ctc_Node->node_window, 3, MUIM_Set, MUIA_Window_Open, FALSE);
> }
Looks right.
> MCC_Message is my custom class, which contains userdata, ctc_Node is a
> linked list containing an Object *node_window pointer (amongst other
> things), which stores the window object once it's created.
>
> As you can see, if successfully created I then add the newly created window
> to the application (app, global variable) and set a notification to close
> the window, but not destroy it, if the CloseRequest notification occurs.
>
> Now, this all works fine and does exactly what I expect it to do, until
> however, I wish to close the window by clicking on the close window gadget.
>
> At this point I get a Recoverable Alert (01000009) and then finally a
> GrimReaper with the following GURU; 81000005 and of 'type unknown'.
>
> This always happens when clicking the close button. Why? All I'm doing is
> not showing it! I would understand if the window was being destroyed and
> the userdata wasn't being cleaned up. And besides, the userdata only
> contains pointers to objects belonging to the window.
>
> The only messages I process in the despatcher are OM_NEW and MUIM_Cleanup.
> Should I be processing other messages if I have userdata in the class?
Closing a window invokes MUIM_Cleanup. Could this be your problem?
> Oh, one last quick one: How do you set the font size of the text in a single
> column listview?
MUIA_List_AdjustWidth, TRUE
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