jalkadir@xxxxxxxxxx writes:
> I have been racking my brains trying to find informatio about writing a
> callback function that receives two parameters one that indicates the type
> of icon I want displayed and the other a character string variable that
> holds the different messages this callback function will pass to a a
> dialogbox.
>
> This is what the callback function looks like, or I think it would look like:
> typedef struct{
> gchar* str; // Message
> GtkWidget* obj; // Icon
> }DATA;
> void GeneralMsg(DATA&);
> void GeneralMsg(DATA& d){
> // Create and display a message box with the information in the
> DATA variable
> .....
> }
>
> Is this possible?
Well, yes, I guess. Personally, I'd go for a simpler and cleaner
approach:
typedef enum
{
MY_MESSAGE_FOO,
MY_MESSAGE_BAR
} MyMessage
And for the callback:
void
my_message_callback (MyMessage message_type,
GtkWidget *widget)
{
...
}
However, if by callback you mean a signal handler, I would create a
signal and class vfunc to do that, and also create a custom marshaller
using glib-genmarshal (VOID:ENUM,OBJECT =>
my_cclosure_marshal_VOID__ENUM_OBJECT)
Read the excellent GObject tutorial (in the Glib 2.8 API reference)
for more detail on how to create and emit signals.
Something like
typedef void (*MyMessageFunc)(MyMessage message_type, GtkWidget
*widget);
struct _MyClass
{
MyMessageFunc *message;
}
And in your class_init:
my_signals[SIGNAL_MESSAGE] =
g_signal_new ("message",
G_OBJECT_CLASS_TYPE(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (MyClass, message),
NULL, NULL,
my_cclosure_marshal_VOID__ENUM_OBJECT,
G_TYPE_VOID, 2, G_TYPE_ENUM, G_TYPE_OBJECT);
Regards,
Roger
--
Roger Leigh
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