Transparent browser widgets?

jonathandlynch at gmail.com jonathandlynch at gmail.com
Mon May 15 13:35:36 CEST 2017


Hi Mark,

Would you guys consider looking into this further? It would give developers so many presentation options.

Sent from my iPhone

> On May 15, 2017, at 7:19 AM, Mark Waddingham via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
>> On 2017-05-13 19:35, Jonathan Lynch via use-livecode wrote:
>> Apparently, both WebView (android) and uiwebview (iOS) have transparent modes.
>> Would it be easy for the LC team to implement a transparent mode for
>> browser widgets, where the background color is transparent, allowing
>> other objects to show through?
>> This would obviate the need for some the processor intensive image
>> transfers in and out of the widget.
>> I know one would have to set the background-color of the body element
>> to transparent and set a couple of settings in the WebView calls. Is
>> that all it would take?
> 
> The browser widget uses a system 'view' (UIView on Mac, View on Android,
> HWND on Windows, NSView on Mac and X11 Window on Linux) to host the browser
> control - thus whether or not they can be composited with a transparent
> background depends on the system.
> 
> For Mac, Android and iOS it is probably possible by just toggling a flag
> to say whether the view is opaque or not (although I've not looked into
> it).
> 
> For Windows, Linux things are more tricky - as it requires that child
> windows composite into the parent window. The 'traditional' model on those
> platforms is that child windows are islands-on-their-own. That being said,
> CEF does have a windowless mode in more recent versions which might be
> usable to get a similar effect. However, I'm not sure what would be involved
> in providing that as a choice.
> 
> Warmest Regards,
> 
> Mark.
> 
> -- 
> Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
> LiveCode: Everyone can create apps
> 
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