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DarkBASIC Professional Discussion / Is it possible to capture the event for a close window?

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Scraggle
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Posted: 28th Aug 2010 14:56
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I'm sure I could have answered this myself a while ago but having been away from DBP for 2 years I am a bit rusty.
I have created a software tool and I want to be able to write to a file when the user exits so that I can store the positions of windows, panels etc.

If the user selects File->Exit then I can do what I want.
I know I can also disable the escape key then react when the user presses the escape key.
However, if the user clicks the close button there is nothing I can do about it.
I know I could get around the issue completely by making the software full screen but I would really rather keep it windowed.

Any suggestions?



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Blobby 101
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Posted: 28th Aug 2010 16:45
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I had this problem with a chat program release I was working on - The only solution I found was to disable the window borders (including the close button) and just add sort of "fake" close and minimise buttons and to the application and make my own titlebar then handel it all manually in the program.

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Sixty Squares
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Posted: 28th Aug 2010 18:13
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Alternatively you could use BBB GUI and turn control over the window to it. It has a very easy way to detect if the window was closed.


Guns, cinematics, stealth, items and more!
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Thebeely
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Posted: 29th Aug 2010 14:48
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Or BlueGUI.
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Scraggle
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Posted: 29th Aug 2010 19:14
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Actually, I am using BlueGui but I don't see how I can use that to capture the close event of the DBP window ... prey tell.



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Diggsey
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Posted: 29th Aug 2010 21:03
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IanM's plugins let you hook into the windows message loop directly so you can catch and filter WM_CLOSE messages, and I think with BlueGUI you can turn the main window into a gadget which will have a similar effect.

[b]
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Scraggle
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Posted: 29th Aug 2010 23:26
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Cheers, Disggsey, I'll give both methods a try



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=PRoF=
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Posted: 29th Aug 2010 23:49
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I prefer the IanM Matrix 1 plug in method.

I have had issues using main=createGadgetFromWindow(mainWindow()) method, It changes something about the way BlueGUI handles events, particually drop down menus.

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BMacZero
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Posted: 30th Aug 2010 00:03
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You could also just save the data periodically, or whenever the user moves windows around, which would take care of any type of exit, even crashes, Alt+F4, or shutdown.


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Latch
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Posted: 30th Aug 2010 14:04
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I haven't done this kind of thing for a while so the details are a bit sketchy in my mind but you could subclass the window using a dll; passing the information back and forth through memblock pointers.

You set up your own wndproc in the dll, and capture the close event from there.

Another way, and to avoid the subclassing, is to create a dll that doesn't necessarily do anything (it can if you want) accept maybe record the window information you want to save, and in DLLMain, you can use a switch case to DLL_PROCESS_DETACH when the window closes and have your info write to disk or run any other close down routines.

Enjoy your day.
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