[Gambas-user] Supped up the WebAudio.class

[Benoit Minisini]

Le 28/07/2022 à 11:33, Bruce Steers a écrit :
> 
> 
> On Thu, 28 Jul 2022 at 09:41, Benoit Minisini 
> <benoit.minisini at gambas-basic.org 
> <mailto:benoit.minisini at gambas-basic.org>> wrote:
> 
>     Le 28/07/2022 à 10:28, Benoit Minisini a écrit :
>      > Le 28/07/2022 à 01:23, Bruce Steers a écrit :
>      >>
>      >>   How about a hidden event and use it for passing the data and
>     firing
>      >> required event?
>      >>
>      >
>      > Nope.
>      >
>      > You must send the 'Position' property from the browser to the
>     server by
>      > using:
>      >
>      >      gw.update(<id>, '<property>', <value>);
>      >
>      > Where <id> is the id of the control, <property> the name of the
>      > property, and <value> its value.
>      >
>      > Then you handle that message on the server in the '_UpdateProperty'
>      > hidden method of the control.
>      >
>      > Look at the source code of 'WebTextBox' to see how the 'Text'
>     property
>      > is updated when the text changes on the browser.
>      >
>      > Once you have updated the property, you can raise the 'Position'
>     event.
>      >
>      > Regards,
>      >
> 
>     Note that you have a WebControl '_GetUpdateJS()' method that generates
>     for you the HTML code that calls 'gw.update' when a specific DOM event
>     is triggered.
> 
>     See again WebTextBox '_Render()' method for an example.
> 
> 
> Thanks Ben, I've implemented the gw.update() + _UpdateProperty() method 
> and it's sooo much better,
> the page objects were flickering during play before but now it's looking 
> nice and clean, i guess for the above mentioned refreshing reasons
> 
> Also now i can get rid of the Observer as no longer needed.
> 
> Many thanks for the pointers :)
> Am currently rebuilding and checking out gb.media MediaPlayer for 
> guidance :)
> 
> Respects
> BruceS
> 

When a property of a control changes, you usually must refresh it by 
calling the _Refresh() method.

You can avoid a full refresh of the control to speed up things by using 
custom javascript code instead. Look at the SetText() method of the 
WebTextBox control to see an example.

Another point: you must not catch an event on the browser side if you 
don't implement the event handler on the server side.

To detect that, use the 'Object.CanRaise()' method. As usual, look at 
the '_Render' method of WebTextBox for an example.

Regards,

-- 
Benoît Minisini.