Am Thu, 05 Jun 2008 12:25:02 +0200
schrieb Xavier Bestel <[EMAIL PROTECTED]>:
> On Thu, 2008-06-05 at 08:59 +0200, Jean-Yves Lefort wrote:
> > Likewise, you can implement a class "Foo" containing an int property
> > "bar" using the GObject way:
> >
> > #define G_TYPE_FOO (g_foo_get_type())
> > #define G_FOO(obj)
> > (G_TYPE_CHECK_INSTANCE_CAST((obj), G_TYPE_FOO, GFoo)) #define
> > G_FOO_CLASS(class) (G_TYPE_CHECK_CLASS_CAST((class),
> > G_TYPE_FOO, GFooClass)) #define G_IS_FOO(obj)
> > (G_TYPE_CHECK_INSTANE_TYPE((obj), G_TYPE_FOO)) #define
> > G_IS_FOO_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE((class),
> > G_TYPE_FOO)) #define G_FOO_GET_CLASS(obj)
> > (G_TYPE_INSTANCE_GET_CLASS((obj), G_TYPE_FOO, GFooClass))
> >
> > typedef struct
> > {
> > GObject base;
> > } GFoo;
> >
> > typedef struct
> > {
> > GObjectClass base;
> > } GFooClass;
> >
> > GType g_foo_get_type (void);
> >
> > int g_foo_get_bar (GFoo *foo);
> > void g_foo_set_bar (GFoo *foo, int value);
> >
> > enum {
> > PROP_0,
> > PROP_BAR
> > };
> >
> > G_DEFINE_TYPE(GFoo, g_foo, G_TYPE_OBJECT)
> >
> > static void g_foo_get_property (GObject *object,
> > guint prop_id,
> > GValue *value,
> > GParamSpec *pspec)
> > {
> > GFoo *foo = G_FOO(object);
> >
> > switch (prop_id)
> > {
> > case PROP_BAR:
> > g_value_set_int(value, g_foo_get_bar(foo));
> > break;
> > default:
> > G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id,
> > pspec); break;
> > }
> > }
> >
> > static void g_foo_set_property (GObject *object,
> > guint prop_id,
> > const GValue *value,
> > GParamSpec *pspec)
> > {
> > GFoo *foo = G_FOO(object);
> >
> > switch (prop_id)
> > {
> > case PROP_BAR:
> > g_foo_set_bar(foo, g_value_get_int(value));
> > break;
> > default:
> > G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id,
> > pspec); break;
> > }
> > }
> >
> > void g_foo_class_init (GFooClass *class)
> > {
> > GObjectClass *object_class = G_OBJECT_CLASS(foo);
> >
> > object_class->get_property = g_foo_get_property;
> > object_class->set_property = g_foo_set_property;
> >
> > g_object_class_install_property(class,
> > PROP_BAR,
> > g_param_spec_int("bar",
> > NULL,
> > NULL,
> > 0,
> > G_MAXINT,
> > 0,
> >
> > G_PARAM_READWRITE));
> > }
> >
> > void g_foo_init (GFoo *foo)
> > {
> > }
> >
> > int g_foo_get_bar (GFoo *foo)
> > {
> > /* ... */
> > }
> >
> > void g_foo_set_bar (GFoo *foo, int value)
> > {
> > /* ... */
> > }
> >
> > or using the Qt way:
> >
> > class QFoo : public QObject
> > {
> > Q_OBJECT
> >
> > Q_PROPERTY(int bar READ bar WRITE setBar)
> >
> > public:
> > void setBar (int value);
> > int bar () const;
> > };
> >
> > void QFoo::setBar (int value)
> > {
> > // ...
> > }
> >
> > int QFoo::bar ()
> > {
> > // ...
> > }
> >
> > Which way do you prefer?
>
> BTW here is how it would look in Vala:
>
> using GLib;
>
> public class Foo : Object {
> public int bar { get; set; }
> }
What about Genie even?
[indent=4]
uses
Glib
class Foo : Object
init
var bar = 0
Yours,
Christian
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