[Interest] Showing QGuiApplication/QML application on a given HWND ref.

[Nuno Santos]

Hamish,

Your tip was right.

QWindow::fromWinId is expecting a NSView:

plugins/platforms/cocoa/qcocoawindow.mm:        NSView *foreignView = (NSView *)WId(tlw->property("_q_foreignWinId").value<WId>());

But what I’m giving is a Carbon WindowRef.

I have found code to make an NSWindow from WindowRef:

You can create an NSWindow object for a Carbon window by allocating an NSWindow object and
then initializing the object using the initWithWindowRef: method, as shown in the following line of
code:
cocoaFromCarbonWin = [[NSWindow alloc] initWithWindowRef:window];

Do you think is my responsibility to create the NSWindow and then the NSView to provide to fromWinId?

Thanks,

Regards,

Nuno

> On 04/06/2015, at 09:34, Hamish Moffatt <hamish at risingsoftware.com> wrote:
> 
> On 04/06/15 17:44, Nuno Santos wrote:
>> Hi,
>> 
>> Unfortunately this technic doesn’t seem to be working on Mac. Not sure if this is a BUG.
>> 
>> It is able to create the QQuickView, but as soon as it instantiates QQuickView, it crashes:
>> 
>> if (!window)
>> {
>>  window = QWindow::fromWinId((WId)ptr); // line that causes the crash
>> 
>> 
>>         ...
>> 
>> 2015-06-04 08:38:37.892 Live[88624:8396551] -[NSHIObject setPostsFrameChangedNotifications:]: unrecognized selector sent to instance 0x1b333860
>> 
>> Does this say something to anyone?
>> 
> 
> "unrecognized selector" means a method was called that doesn't exist. Or more likely, the object you passed to fromWinId was not the type that the Cocoa platform plugin expected.
> 
> The platform plugin is expecting an NSView*, and maybe what you have is an NSWindow*. (I don't know much about Cocoa.) Or maybe it's not a Cocoa window at all?
> 
> 
> Hamish

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