B4J Question [ABMaterial] fast image refresh

[peacemaker]

Hi, All and @alwaysbusy

If to try to make "real-time" image update without caching often, say, each second or better faster - is it possible ?
How to use .SetVisibilityFlush, what is first parameter format ?

Sub timLog_Tick
img_frame.Source = "../../" & "img.jpg"   'it's being updated image file
img_frame.Refresh   'but only first one is constantly visible on web-page, not updated by timer, but file is for sure updated
End Sub

 

[peacemaker]

Seems, solved - file names should be not the same.

 

[Cableguy]

Seems, solved - file names should be not the same.

I remember that @alwaysbusy appends a TimeStamp to files he wishes not to be cached, resulting in different, but still logical, filenames

 

[peacemaker]

Yes. I have to generate lots of images

Dim tmp_img As String = "tmp_" & DateTime.Now & ".jpg"

and it's rather trouble to delete them next.... They are loaded not so fast by the browser...

 

[Cableguy]

Yes. I have to generate lots of images

Dim tmp_img As String = "tmp_" & DateTime.Now & ".jpg"

and it's rather trouble to delete them next.... They are loaded not so fast by the browser...

Since you are the one saving them, you can easily keep track of the last used one, and delete it.

 

[alwaysbusy]

Have you tried adding the timestamp at the url level, not at filename level? This should hint at the browser that it is new.

Sub timLog_Tick
img_frame.Source = "../../" & "img.jpg?" & DateTime.Now  ' ? + timestamp
img_frame.Refresh   
End Sub

Alwaysbusy

 

[peacemaker]

timestamp at the url level

Indeed works !!!111 Thanks !