B4J Question BANano - Load additional Layout

Declan · Apr 27, 2020

I am running the awesome BANano Library by @alwaysbusy.
I have a SKNavigationBar in my layout ("main")
When the user clicks on an option of the SKNavigationBar, I need to load a new layout ("contact")

I have tried:

B4X:

Sub SKNavigationBar1_Click (event As BANanoEvent, menu As String)
If menu ="contact" Then
        Log("Clicked on CONTACT")
        BANano.LoadLayout("#body", "contact")
    End If
End Sub

Where "contact" is my Layout

I receive the following error in the Log:

B4X:

app.js:9 Uncaught TypeError: Cannot read property 'addmenu' of undefined
    at banano_cc.banano_ready (app.js:9)
    at app.js:9

alwaysbusy · Apr 27, 2020

The navigation bar is probably in your layout itself, no? If so, replacing that layout with another layout will kill the previous menu, hence giving this error.
You will need an outer layout containing the SKNavigationBar that is loaded on the #body. In this layout you can use a SKContainer.

Now every time you want to load a layout, load it in this SKContainer.

Check out the WebsiteDemo in the zip, it uses multiple layouts where a user can navigate by the menu.

The BaseLayout contains the SKNavigationBar and the SKContainer1. All other layouts are loaded on the SKContainer1 control, depending on what one has clicked in the menu.

Declan · Apr 27, 2020

I have run the Demo "ChatNoir" WithRouter.
The text does not show in SKNavigationBar1.
I get the following error:

B4X:

Access to XMLHttpRequest at 'file:///C:/PROGRA~2/ANYWHE~1/B4J/LIBRAR~1/BANano4.50c/BANano4.50/WEBSIT~1/WITHRO~1/Objects/ChatNoir/assets/en.json' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.
app1587984847755.js:2 Network error
assets/en.json:1 Failed to load resource: net::ERR_FAILED
index.html:1 Access to XMLHttpRequest at 'file:///C:/PROGRA~2/ANYWHE~1/B4J/LIBRAR~1/BANano4.50c/BANano4.50/WEBSIT~1/WITHRO~1/Objects/ChatNoir/assets/en.json' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.
app1587984847755.js:2 Network error
app1587984847755.js:2 GET file:///C:/PROGRA~2/ANYWHE~1/B4J/LIBRAR~1/BANano4.50c/BANano4.50/WEBSIT~1/WITHRO~1/Objects/ChatNoir/assets/en.json net::ERR_FAILED
dohttpforurl @ app1587984847755.js:2
loadlanguagefile @ app1587984847755.js:2
sknavigationbar1_click @ app1587984847755.js:2
(anonymous) @ app1587984847755.js:2
n.handleclick @ app1587984847755.js:2
(anonymous) @ app1587984847755.js:2
(anonymous) @ app1587984847755.js:2
a @ app1587984847755.js:2

I there a very simple code example that will show only a couple of options on a SKNavigationBar that will load additional layouts?
I could then build on this.

alwaysbusy · Apr 27, 2020

You should read the README.txt in the \WebsiteDemo\ how to run this demo:

You need to run these projects on a Web server (or with the Chrome Web server plugin: see https://www.b4x.com/android/forum/threads/banano-tip-running-a-test-server.100180/#content)

It is all explained in the demo. Maybe look at the one called WithoutRouter if the other one is to complex. I can't make it much simpler than that.

Declan · Apr 27, 2020

I am running WithoutRouter.
The SKNavigationBar1_Click event does not fire

Declan · Apr 27, 2020

Thanks

You need to run these projects on a Web server (or with the Chrome Web server plugin: see https://www.b4x.com/android/forum/threads/banano-tip-running-a-test-server.100180/#content)

I have gone through all this.
I cannot get WithoutRouter to run.
The problem is loading the texts into the SKNavigationBar1.
If I hard-code the SKNavigationBar1.AddMenu, the event is displayed, but I cannot access the event with SKNavigationBar1_Click.
Maybe time to go back to VS C#

alwaysbusy · Apr 27, 2020

I just retried it: fired up de Web Server plugin, pointed it to the ChatNoir folder and browsed to the URL it shows: http://127.0.0.1:8887

Everything works as expected. When clicking the menus, other layouts are shown.

alwaysbusy · Apr 27, 2020

Declan said:
Maybe time to go back to VS C#

I guess so. There is only so much I can do, sorry.

Declan · Apr 27, 2020

I finally have WithoutRouter running.
Thanks for your patience.
I have put so much into this already, I must continue.
Your demo is awesome, but very much an overkill for my app - basically an input for a MySQL database with Labels and Textboxes.
I will try to edit the WithoutRouter demo to "remove" the loading of texts from json files.
Do you feel that this is the correct "learning-curve" I should pursue?

alwaysbusy · Apr 27, 2020

I wouldn't take the WebsiteDemo as a base, as it was a real project I made for a friend, but is only a Website (static, no input possible). You can use it to to find out how to load multiple layouts however.

I would start from scratch.
1. First design your layouts in the abstract designer
2. Generate the events on buttons, inputs, etc...
3. Write the logic of your app

Have you decided what to use for your backend? (php, or a B4J server). If you would use B4J, \BANano4.50\B4JServerDemo\New System 4.50+\Demo in the zip is a good starting template as it demonstrates how both the frontend and backend talk to each other.

Declan · Apr 27, 2020

I have, earlier today, started from scratch but had a problem loading layouts from the SKNavigationBar.
In VS I just used a Tab control.
I will use B4J Server as I am somewhat familiar with it.
I have a B4J UI app that I have written that writes/reads data to/from a MySQL database.
I was hoping to reconfigure into a web app, but that has proven to be more difficult than I imagined.

alwaysbusy · Apr 27, 2020

A need a couple of more days to finish the next version of BANano (with the new skeleton library that contains the tab control).

It have been long hours since the covid-19 thing (some people in the company in my day job have been set on non-active) and I have been covering a lot of work from them doing 18+ hour days. So apologies for my reaction to your 'switch back to c#' a couple of posts back ?

I'll send you a copy of the new version when I got something ready.

Declan · Apr 27, 2020

No problem - same here, after the lock-down I was also dumped with work that others have ignored. Seems like a lot of people have resorted to being on holiday.
If I can get a small app going that will load 2 layouts from the SKNavigationBar I will be good to go.
Hopefully I will be able to connect directly to MySQL.
Many thanks for all your patience and assistance.
KEEP SAFE

B4J Question BANano - Load additional Layout

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