Re: GtkClist signals and double click

[Vlad Harchev <hvv hippo ru>]

On Fri, 4 Aug 2000, Salvador Ramirez wrote:

 Hi, 

> Hi,
> 
>  I would like to know why the double click event is not implemented 
> as a signal in some GTK+ widgets? I tried to make a GtkClist in which
> the user could select a row either with a simple selection and then
> pressing a button and with a double click over the row. It would be
> far simpler to connect a supposed "double_click" signal with the same
> callback (for example) connected to the button. But as this is not
> so you have to connect the "button_press_event" with a more complex
> callback where you have to ask for some other low level events (as
> explained on the GTK+ FAQ). 

 As for non-existance of "double-clicked": it's obvious that double click 
consists of two clicks, so in case of supporting "double-clicked" signal all
mouse clicks would have to be handled with a doubleclick delay (in order gtk
was able to determine what click it was - single click or double click). As I
understand, gtk developers decided that this was not the right thing to do (I
think they were right too).
 As for CList - in most selection modes (except GTK_SELECTION_SINGLE) it seems
to me that double click will have the same effect as single click - so you
shouldn't worry about handling it separately.

>  Well, I am still trying to get this working. I know GtkClist elements
> have a member structure called selection of type GList. When there is
> nothing selected, selection is NULL? selection have a pointer called
> data, this data is the data available on the selected row? what is
> its format? I tried to print out this data pointer casted to (char *)
> but I got a segmentation fault.
> Any help will be very appreciated,

 See FAQs. As I remember, 'selection' is NULL if nothing is selected, if it's
not NULL, then if selection mode is SINGLE or BROWSE, then selection->data is
the index of selected row, otherwise it or the very 'selection' is a GList* of
selected row indices. See documentation.

> thanks in advance!
> 
> ---sram
> 
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 Best regards,
  -Vlad