iOS Question ProgressDialog Equivalent

[Sanxion]

Hi all

Could somebody please tell me what the equivalent B4i command is for the B4A command:

ProgressDialogShow("Please wait...")

Thanks

 

[QtechLab]

Hi all

Could somebody please tell me what the equivalent B4i command is for the B4A command:

ProgressDialogShow("Please wait...")

Thanks

You must import HUD library and then declare an object of that class

es:

dim hd as HUD
hd.progressDialog

Here's the reference https://www.b4x.com/b4i/help/ihud.html

 

[Sanxion]

You must import HUD library and then declare an object of that class

es:

dim hd as HUD
hd.progressDialog

Here's the reference https://www.b4x.com/b4i/help/ihud.html

I have implemented the ProgressDialog, however, it does not appear. In B4A, we use the DoEvents command to force the UI to display the progress icon. Is there an equivalent in B4i?

 

[JanPRO]

Is there an equivalent in B4i?

No, probably you have implemented the ProgressDialog wrong, but it's hard to help you without seeing the code.

Jan

 

[Sanxion]

No, probably you have implemented the ProgressDialog wrong, but it's hard to help you without seeing the code.

Jan

This is the code:

hd.ProgressDialogShow("Please wait...")
Page1.RootPanel.RemoveAllViews
Page1.RootPanel.LoadLayout("ActivitiesA")

 

[JanPRO]

Mhh, should work. Can you upload a example project?

 

[Sanxion]

Mhh, should work. Can you upload a example project?

Not easily as it is part of a large project.

 

[JanPRO]

I guess, your are hiding the dialog immediately after you have showed it, so there is no time, in which the dialog could be visible for you. Try to work with asynchronous methods to avoid this.

 

[Sanxion]

I guess, your are hiding the dialog immediately after you have showed it, so there is no time, in which the dialog could be visible for you. Try to work with asynchronous methods to avoid this.

Could you give an example please of how I would use asynchronous methods in this situation?

 

[JanPRO]

You can't say it general. For example when you use a HttpJob, you would hide the dialog in the JobDone sub and don't do something like

    Dim Job As HttpJob
    Job.Initialize("",Me)
    hd.ProgressDialogShow("Please wait...")
    Job.Download("Link")
    hd.ProgressDialogHide

But as I said this is just a guess ...

 

[QtechLab]

I have implemented the ProgressDialog, however, it does not appear. In B4A, we use the DoEvents command to force the UI to display the progress icon. Is there an equivalent in B4i?

Usually i use the ProgressDialog when i'm downloading some data, that is an operation that don't pause the main thread of the application.
I've tried the ProgressDialog combined with database or "loading views" operations without seeing anything.

Asynchronous method calls doesn't block the calling thread while waiting for a reply.

(For example the HTTPJOB).
In simple words:

The HTTP JOB is an object that allow you to make a call to a Web server.
After the Call your HTTP JOB object is waiting for a response from the sever without blocking the execution of your main thread.

It means that you can continue doing operation while the object is waiting for response, for example showing a ProgressDialog.

When the HTTP JOB object get a response from the server, it will raise an event that give you the status of the operation (in this sub you can hide your ProgressDialog)

I hope to have been clear and simple. My english is elementary.

 

[Sanxion]

Usually i use the ProgressDialog when i'm downloading some data, that is an operation that don't pause the main thread of the application.
I've tried the ProgressDialog combined with database or "loading views" operations without seeing anything.

Asynchronous method calls doesn't block the calling thread while waiting for a reply.

(For example the HTTPJOB).
In simple words:

The HTTP JOB is an object that allow you to make a call to a Web server.
After the Call your HTTP JOB object is waiting for a response from the sever without blocking the execution of your main thread.

It means that you can continue doing operation while the object is waiting for response, for example showing a ProgressDialog.

When the HTTP JOB object get a response from the server, it will raise an event that give you the status of the operation (in this sub you can hide your ProgressDialog)

I hope to have been clear and simple. My english is elementary.

Yes I understand...But which approach should I use? I want to show a busy indicator whilst a layout is being loaded.

 

[tufanv]

You can first show the dialog and enable a timer with 100 miliseconds for example. Under timer_tick you can load your layout and progressshow will be visible until the load complete.

 

[Erel]

You can use CallSubDelayed or CallSubPlus to load the layout.

 

[Sanxion]

You can use CallSubDelayed or CallSubPlus to load the layout.

Erel, I have changed my code to use CallSubDelayed, however, I now receive this error: Object was not initialized (B4IPanelView). I assume this is because of the way I have changed it?

Sub LoadSectionB
   
    hd.ProgressDialogShow("Please wait for the lessons to load...")
   
    CallSubDelayed(Me,"LoadLayoutB")
'    Page1.RootPanel.RemoveAllViews
'    Page1.RootPanel.LoadLayout("ActivitiesB")
'    PositionThePanels
'    sectionBLoaded = True
'    sectionALoaded = False
    hd.ProgressDialogHide

End Sub

Sub LoadLayoutB
   
    Page1.RootPanel.RemoveAllViews
    Page1.RootPanel.LoadLayout("ActivitiesB")
    PositionThePanels
    sectionBLoaded = True
    sectionALoaded = False
   
End Sub

 

[Erel]

Your code is wrong. You should hide the dialog from LoadLayoutB. However this is not related to the error. Make sure not to access the views before they are loaded. Hard to say anything more without seeing the relevant code.