By name?

[LucaMs]

The first question that everyone (or almost everyone) has asked:

"How do I use "controls"(Views) by name"?

https://www.b4x.com/android/forum/t...oss-platform-customlistview.84501/post-897775

 

[ilan]

The first question that everyone (or almost everyone) has asked:

"How do I use "controls"(Views) by name"?

https://www.b4x.com/android/forum/t...oss-platform-customlistview.84501/post-897775

this feature is so important and will safe lots of bugs.
adding a view and destroying the order will cause the app not to work and finding the bug can be very hard.
great addition!

 

[LucaMs]

I hope it is clear what I meant.
Many new users, including myself, initially wondered how to access Views by name. The new feature (and the new official library) allows for this.

 

[Filippo]

The first question that everyone (or almost everyone) has asked:

"How do I use "controls"(Views) by name"?

https://www.b4x.com/android/forum/t...oss-platform-customlistview.84501/post-897775

One thing I didn't understand, how or where is "dd" initialized?
I can't find any information.

Dim chk As B4XView = dd.GetViewByName(pnl, "CheckBox1")

 

[mangojack]

One thing I didn't understand, how or where is "dd" initialized?
I can't find any information.

dd refers to the DesignerUtils (DDD) class

Private dd As DDD

Then later in App_Start or Page_Create (B4J ...) it is initialised ,

dd.Initialize
   
'The designer script calls the DDD class. A new class instance will be created if needed.
'In this case we want to create it ourselves as we want to access it in our code.
xui.RegisterDesignerClass(dd)

the latest xCLV example shows everything required to get up to speed.

https://www.b4x.com/android/forum/attachments/clvexample-zip.131186/

 

[mangojack]

One thing I did notice in the example was the older method to change / access a views property ..

Dim lbl As B4XView = dd.GetViewByName(pnl, "Label1")
lbl.Text = "Clicked!"

whereas you are still able to access the property directly ...

dd.GetViewByName(pnl, "Label1").Text = "Clicked!"

 

[Filippo]

Hi @mangojack ,

many thanks for the explanation.

 

[LucaMs]

One thing I did notice in the example was the older method to change / access a views property ..

Dim lbl As B4XView = dd.GetViewByName(pnl, "Label1")
lbl.Text = "Clicked!"

whereas you are still able to access the property directly ...

dd.GetViewByName(pnl, "Label1").Text = "Clicked!"

That is because GetViewByName returns a B4XView.
Also, you should still be able to use the "As" keyword (inline casting):

dd.GetViewByName(pnl, "Panel1").As(Panel).Elevation = 6