app.EnableBackKey()

Soni Kumari

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Aug 20, 2026, 2:30:55 AM (8 days ago) Aug 20

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I build a html project and placed app.js script in head

And access my html project in webveiw

My html projects use app.EnableBackKey(false) function OnBack(){

// To dismiss current active window

}

But in webveiw it back button get false but function Onback() doesn't work

In html standalone it works but not in webveiw so that i can't dismiss active window by pressing back button please help me to achieve it

Alan Hendry

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Aug 20, 2026, 5:14:46 AM (8 days ago) Aug 20

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HI,

Not sure what you mean.

This seems to work

Regards, ah

<html>
<head>
<meta name="viewport" content="width=device-width">
<script src="ds:/Sys/app.js"></script>
</head>
<script>
function OnStart() {
app.ShowPopup( "HTML Rocks!" );
app.EnableBackKey( false )
}
function OnBack() {
app.ShowPopup( "You pressed the Back button" )
}
</script>

<style>
body { background-color: #ffffff; }
.hello {
font-size: 42;
width: 100%;
margin-top: 2em;
text-align: center;
color: blue;
}
</style>

<body onload="app.Start()">
<div class=hello> Hello World! </div>
</body>
</html>

Soni Kumari

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Aug 20, 2026, 5:30:25 AM (8 days ago) Aug 20

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I tried your sample code but function OnBack not triggered in webveiw

function OnStart()

{

lay = app.CreateLayout( "linear", "VCenter,FillXY" );

web = app.CreateWebView( 1, 1, "Progress" );

web.SetOnProgress( web_OnProgess );

lay.AddChild( web );

app.AddLayout( lay );

web.LoadUrl( "your_sample_code.html" );

}

function web_OnProgess( progress )

{

app.Debug( "progress = " + progress );

Alan Hendry

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Aug 20, 2026, 5:59:33 AM (8 days ago) Aug 20

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HI,

Still not sure what you mean

Can you post example code?

This also works

Regards, ah

function OnStart() {
lay = app.CreateLayout( "linear", "VCenter,FillXY" );

web = app.AddWebView( lay,1, 1, "Progress" );
web.SetOnProgress( web_OnProgess );
app.AddLayout( lay );
web.LoadHtml( "<h1>Header 1</h1><h2>Header 2</h2><h3>Header 3</h3><h4>Header 4</h4><h5>Header 5</h5><h6>Header 6</h6><p>Hello, World!</p>" )
app.EnableBackKey( false )
}

function web_OnProgess( progress ) {
app.Debug( "progress = " + progress );
}

function OnBack() {
app.ShowPopup( "You touched the Back key" )
}

Soni Kumari

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Aug 20, 2026, 6:07:51 AM (8 days ago) Aug 20

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Ii have a html file with multiple window in that document like section one second 2 like full window

I want if any second of window is currently opened then press back button then dismiss that active window and back to home if no active section open in that html fille home means: not back to main js file, only come at that html document home

I tried app.EnableBackKey(false) with OnBack() in the web view it us not working

Not working means: if i open any window in that html file which is showing through webview, isn't that dismiss by pressing back button

Soni Kumari

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Aug 20, 2026, 6:22:05 AM (8 days ago) Aug 20

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This is the spk file to check

Also run 't.html" file alone in html template where it works back button for dismiss window but in webveiw it is not working

Camera Demo.spk

Alan Hendry

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Aug 20, 2026, 7:44:30 AM (7 days ago) Aug 20

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HI,

I changed your Camera Demo.js

function OnStart() {
lay = app.CreateLayout( "linear", "VCenter,FillXY" );
web = app.AddWebView( lay,1, 1, "Progress" );
web.SetOnProgress( web_OnProgess );
app.AddLayout( lay );

web.LoadUrl( "t.html" )

app.EnableBackKey( false )
}
function web_OnProgess( progress ) {
app.Debug( "progress = " + progress );
}
function OnBack() {

app.ShowPopup( "You touched Back" )
}

The OnBack works

In your html when the user touches the <-- arrow

it runs function goHome.

Do you want DS OnBack to run goHome?

function OnBack() {
app.ShowPopup( "You touched Back" )
web.Func( "goHome" )
}

Regards, ah

Soni Kumari

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Aug 20, 2026, 8:03:27 AM (7 days ago) Aug 20

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Thanks! It worked!

But there is still problem

I want to use in app.CreateDialog()

I done this and add webview but as soon as i press back button whole whole dialog dismiss

I used also "NoCancel" but not work

I want: like: open my app, on main home which is app.js and there are some layouts when click on one button then show that html file dialog

If there is no active window in that dialog ( which show t.html) then dismiss the whole dialog and come on main app home

If there is active window then work back button for dismiss the window and if none of left the back to main layout home

Alan Hendry

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Aug 21, 2026, 3:57:31 AM (7 days ago) Aug 21

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HI,

Not sure what you are trying to do

web.Func(function,parms)

can invoke functions within the webview

web.Execute(code, callback)

can run any code in the webview

and send a result to the callback.

Regards, ah

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