On Tue, 15 Aug 2006 13:19:51 -0400
Andrew Haines <[EMAIL PROTECTED]> wrote:
> A.J. Venter wrote:
> >>> Basically I don't know if lazarus CAN do what I need for this
> >>> part... and before I can finalize design, I need to know if this
> >>> will be a form inside the app or a sepperate program altogether
> >>> acting as a plugin.
> >> I'm not sure that X/The Window manager can do what you want ?
> >> This is not a Lazarus matter alone.
> > That part at least I CAN answer. It can, there is a wm hint for
> > this. The reason I know is that I have done it before.
> > If you use SDL and create your screen with OR SDL_FullScreen it
> > does exactly that .
> > The real question is if you can do this in lazarus - I am pretty
> > sure GTK ALSO has a function for it (not ABSOLUTELY sure in this
> > case though).
> >
> > I used the SDL plugin mechanism in direqcafe up to and including
> > version 3.x - as I am starting on version 4.0 (with new name
> > zycafe) I would LIKE if possible to do that WITHOUT the SDL
> > dependency though.
> >
> > In theory somebody with sufficient knowledge of C and xlib should
> > be able to figure out how it's done by looking at the SDL code, and
> > possibly implementing something like an fs_FullScreen or perhaps a
> > TFullScreen component based on it (e.g. a nonvisual component you
> > can drop on a form to make the form fullscreen which also lets you
> > set parameters like 'grab keyboard' or such) ?
> > For windows the sheer AMOUNT of existing full-screen apps suggest
> > there is a almost certainly a win32 API call for it.
> >
> > I won't lie and pretend I am good enough at C and Xlib to do it by
> > myself (I could but I don't have the TIME for all the research I
> > would need to do first) but if anybody else would have a use for
> > such a function, we could work together on it.
> > I have done some xlib work in lazarus before TScreenSize uses it
> > under Linux.
> >
> > Either way - the consensus seems to be that lazarus cannot do it at
> > present ?
> >
> > A.J.
> >
>
> Hi, the attached tar.bz2 project shows how to use a lcl x11/gtk1 form
> fullscreen and have exclusivly the mouse and keyboard.
>
> Gtk2 is possible as well, you just need to make minor changes to
> Form2X11Window
Thanks.
I added those functions to gtkproc.pp:
procedure SetWindowFullScreen(AForm: TCustomForm; const AValue: Boolean);
procedure GrabKeyBoardToForm(AForm: TCustomForm);
procedure ReleaseKeyBoardFromForm(AForm: TCustomForm);
procedure GrabMouseToForm(AForm: TCustomForm);
procedure ReleaseMouseFromForm(AForm: TCustomForm);
function FormToX11Window(const AForm: TCustomForm): X.TWindow;
Now we need some nice function names for the LCL.
In some sense fullscreen is a windowstate. So maybe we should add it
'wsFullScreen' to TWindowState. OTOH a fullscreen is just a
special wsMaximized, so a FullScreen boolean property might be better.
Comments?
The exclusive grab of mouse and keyboard functions for TCustomForm:
procedure GrabKeyboard; // grab even winow manager keys
procedure ReleaseKeyboard;// undo GrabKeyboard
procedure GrabMouse; // grab mouse for form and childs
procedure ReleaseMouse;// undo GrabMouse
Comments?
Mattias
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