It works. Thanks. But I found another problem. The vala will make a copy
of GdkEventKey everytime, when I access a field of struct GdkEventKey. I
think it is not efficient. How to avoid it? Is it a bug in vala?
I have some code like:
uint keyval = e.keyval; // e is Gdk.EventKey;
uint state = e.state;
I found it be translated to some code like:
355 gboolean result = FALSE;
356 GdkEventKey _tmp0_;
357 guint _tmp1_;
358 guint keyval;
359 GdkEventKey _tmp2_;
360 GdkModifierType _tmp3_;
361 guint state;
362 guint _tmp4_;
363 guint _tmp5_;
364 guint _tmp6_ = 0U;
365 gboolean _tmp7_ = FALSE;
366 self = (Switcher*) base;
367 g_return_val_if_fail (e != NULL, FALSE);
368 _tmp0_ = *e; // !!!!!!!!!!!! EventKey is copied
369 _tmp1_ = _tmp0_.keyval;
370 keyval = _tmp1_;
371 _tmp2_ = *e; // !!!!!!!!!!!! EventKey is copied
again
372 _tmp3_ = _tmp2_.state;
2011/11/26 Tal Hadad <tal...@hotmail.com>
>
> Gdk.Event* real_e = (Gdk.Event*)(&e);
> It's tested.
>
> Gdk.Event* is an unowned Gdk.Event, only different is syntax:
> (Gdk.Event)instance = (Gdk.Event*)->instance
>
> Tal
>
> Date: Fri, 25 Nov 2011 23:48:59 -0500
> From: shawn.p.hu...@gmail.com
> To: vala-list@gnome.org
> Subject: [Vala] How to cast Gdk.EventKey to Gdk.Event ?
> How to cast Gdk.EventKey to Gdk.Event in vala?
>
> some code like, but it does not compile.
>
> 100 public override bool key_release_event(Gdk.EventKey e) {
> 101 if (m_primary_modifier !=
> KeybindingManager.keyval_to_modifier(e.keyval))
> 102 return true;
> 103
> 104 if
> (KeybindingManager.primary_modifier_still_pressed((Gdk.Event)e))
> 105 return true;
> 106
> 107 hide();
> 108 return true;
> 109 }
>
> Thanks,
>
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>
>
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>
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