使用C语言进行面向对象的开发--GObject入门[实例代码]
前面啰嗦的太多了,其实最简单的学习方式就是看代码,
所以就发上来,
在这个例子中
定义了human接口,baby类以及其派生类boy
测试用例展示了使用GObject创建对象和解阔,实现继承,
以及属性和信号等的使用方法
代码(后面有链接)如果运行正确会输出如下,
********************************
******init the type system******
********************************
>>>>>>>>>init completed<<<<<<<<<
********************************
******test the baby object******
********************************
a baby was born.
age : 0
name : no-name
name : Tom
hi, my name is Tom
ne na nai ....suppose that I can talk now ! hi ! I'm just a baby !
age : 1
age : 2
age : 3
I'm not a baby now ,I want to grow up !
age : 4
I'm not a baby now ,I want to grow up !
*******************************
******test the boy object******
*******************************
a baby was born.
age : 0
name : no-name
a baby grow up , then become a boy !
age : 3
my hobby is : playing basketball
name : Mike
hi, my name is Mike
la la la ... haha ! I'm a boy now !
age : 4
the boy is playing basketball
age : 5
my hobby is : playing football
recently I'm interested in playing football
the boy is playing football
name : Mac
hi, my name is changed , now my name is Mac
*******************************
******test the trans func******
*******************************
la la la ... haha ! I'm a boy now !
(.exe:1904): GLib-GObject-WARNING **: invalid cast from `JcBaby' to `JcBoy'//此处是为了测试
ne na nai ....suppose that I can talk now ! hi ! I'm just a baby !
*******************************
******test the unref func******
*******************************
>>unref a baby<<
baby finalized !
>>unref a boy<<
boy finalized !
baby finalized !
具体代码可以在此处下载: /Files/pingf/gobject_test.7z
我的开发环境是:win xp + mingw + slickedit +gtk 2.18
要用gobject肯定是要装gobject的,一般装个gtk就包括了,
当然在linux下也是没问题的
下面截取了部分关于定义的代码
human接口的定义 (部分)
struct _JcIhumanInterface
{
GTypeInterface parent_iface;
void (*speak) ();
};
baby类的定义 (部分)
/* object */
struct _JcBaby
{
GObject parent_instance;
/* public */
//一般的成员对象尽量放在pri中
// int public_int;
/*< private >*/
JcBabyPrivate *priv;
};
/* class */
struct _JcBabyClass
{
GObjectClass parent_class;
/* class members */
/* Virtual method or signals*/
// void (*speak) (JcBaby *self);
void (*born)(void);
void (*grow)(JcBaby *self);
};
struct _JcBabyPrivate
{
guint age;
gchar *name;
};
boy类的定义 (部分)/* object */
struct _JcBoy
{
JcBaby parent_instance;
/* public */
// int public_int;
/*< private >*/
JcBoyPrivate *priv;
};
/* class */
struct _JcBoyClass
{
JcBabyClass parent_class;
/* class members */
/* Virtual method or signals*/
void (*play)(JcBoy *self);
};
struct _JcBoyPrivate
{
gchar *hobby;
};