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;
};