[RFC] Changes to Bluetooth device selection dialog

[Dirk Hohndel]

> On Nov 11, 2017, at 9:40 AM, Berthold Stoeger <bstoeger at mail.tuwien.ac.at> wrote:
> 
> On Sonntag, 5. November 2017 22:59:07 CET Berthold Stoeger wrote:
> 
>> I tried to modify the behavior of the Bluetooth (BT) device selection dialog
>> and would need some feedback. Unfortunately, BT is highly platform
>> dependent and I have no idea how this behaves with non-Bluez 5 backends.
>> 
>> The idea was that when I activate the BT device selection dialog I certainly
>> don't want an empty list of devices. Because that means that I have to
>> click "Scan" in all cases. Ideally, I'd immediately get the BT devices
>> known to the OS (especially the paired ones). It seems that Qt does not
>> provide such a list (an API defect?). But looking into the Qt Bluez5
>> backend of
>> QBluetoothDeviceDiscoveryAgent, these devices are collected synchronously in
>> the start() method.
> 
> I tried to think about other ways to achieve this, but in the end I came full 
> circle. :( My new idea was to always let the BT scan run while the BT device 
> selection dialog is visible. After all, this is not a phone where battery is 
> much of an issue. But trying to implement this, I realized that the current 
> code supports multiple local BT devices and at the moment I have no way to 
> test this. If I find someone with a BT USB-dongle, I will try again.

There are BT USB dongles available for < 10Euro on Amazon. Just saying.

> So I'm going to create a pull request with my old approach [start()/stop()]. 
> It does the right thing for me on Kubuntu, but will probably need some 
> polishing on other OS. This is still RFC status, so please don't apply close 
> to release.

Understood, thanks.

/D