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Re: About DHCtrl and window handles... [message #12761 is a reply to message #12732]

Wed, 14 November 2007 22:18

mirek
Messages: 13980
Registered: November 2005

Ultimate Member

Quote:

The windowed control start working ok, and in parallel also the GLCtrl derived from it. I have just a question more : windowed controls (X11 & windows too) should not receive paint/mouse and so events if they are not initialized. Up to now, I resorted to add an isInitialized member to my DHCtrl, but then all code in event handlers should check it before painting/reacting, ecc.
There is not a flag already present in Ctrl class that can be used to automatize that ?
For example, I'd set a "no_event" flag in constructor of my dhctrl, and reset it after window is created. But then the core of Ctrl should look for such a flag and avoid sending events to the uninitialized ctrl. (at least, no paint events).

Search for "isopen" and "visible" in X11 code.

Quote:

Ok, I'm yet trying to fully understand the event chain, so I can't thell much more on the subject.
What I've seen in some other framework is a main event handler for each control (It could be your EventProc) that is called BEFORE events are dispatched to the control, and that can suppress the dispatching of them, for example, or modify them.
From what I've seen in my code, even if I set Ctrl EventProc to do nothing or to eat all events those are still passed to Paint() function, for example (not yet checked for mouse events). It's normal ?

IMO should not happen for your DHCtrl.

Otherwise, U++ really cares about top-level Ctrls only. Messages from these are passed to the library and all dispatching is performed by library (to normal, window-less widgets).

Mirek

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