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Re: [Visualpython-users] keyboard release
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From: Bruce S. <Bru...@nc...> - 2011-06-11 17:03:18
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Thanks for the code. I'll definitely try to get this into the next release.
Bruce Sherwood
On Sat, Jun 11, 2011 at 6:10 AM, Frank W. Samuelson
<fr...@me...> wrote:
>
> I am interested in using vpython to make some simple games. Apparently there
> are a few others like me based on some internet posts that I found. To make
> games we need to know when keyboard buttons are released as well as pressed.
> To facilitate this happening, I made a couple small code changes represented by
> the below patch on the visual-5.71 release. You are welcome to incorporate or
> ignore them. When keys are released, the generated keyboard events are
> proceeded with the string "Released: " in front of them.
>
> The good:
> -The patch is very small
> -This hack is backwards compatible for people who use code like
> s = scene.kb.getkey()
> if s == 'k': ...
> -Processing of keyboard events is still easy string comparisons
>
> The bad:
> -The code is currently only for gtk. I don't have "Windows" or Mac computer on
> which to test any change that I make.
>
> Thanks for all your work on vpython. It's great.
>
> -Frank
>
>
> --- src/gtk2/display.cpp.~1.58.~ 2009-10-11 17:33:43.000000000 -0400
> +++ src/gtk2/display.cpp 2011-06-11 07:24:54.176217104 -0400
> @@ -133,6 +133,8 @@
> area->set_size_request( w, h );
> area->signal_key_press_event().connect(
> sigc::mem_fun( *this, &display::on_key_pressed));
> + area->signal_key_release_event().connect(
> + sigc::mem_fun( *this, &display::on_key_pressed));
>
> // Glade-based UI.
> // Turned off toolbar in display initialization for now; not yet available on Windows or Mac
> @@ -270,6 +272,11 @@
> // other than a US keyboard.
> guint k = key->keyval;
> std::string ctrl_str;
> +
> + // Is this a press or release?
> + if (key->type == GDK_KEY_RELEASE) {
> + ctrl_str += "Released: ";
> + }
> // First trap for shift, ctrl, and alt.
> if (key->state & GDK_CONTROL_MASK) {
> ctrl_str += "ctrl+";
>
>
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