[Interest] Dragging between separate windows in Qml

[manish sharma]

And about moving the window while mouse is being moved while in external
drag is not possible as startDrag starts a different event loop.

About the question on setting a pixmap for Drag attached property i have
raised a jira ticket
https://bugreports.qt-project.org/browse/QTBUG-37366and so far
response has been quite slow :(




On Wed, Apr 9, 2014 at 1:47 PM, Paweł Pietraszko <
pawel.jan.pietraszko at gmail.com> wrote:

> Hi!
>
> I am trying to accomplish dragging objects beetween QML windows. So far I
> have created my own tab view with draggable tabs (beetwen other tab views).
> Now I want to implement the possibility to drag tabs out to separate
> windows and putting windows back as tabs.
>
> Ideally, object after being dragged from its dock should transform into a
> Window which I would be able to drag and release outside of the current
> window (creating a new one) or drop in other dock in the same window --
> creates object (in my case tab).
>
> I managed to create a new Window after dragging the tab out from the dock.
> Then I can dock it back in the same window without releasing the mouse, or
> just drop it outside (so the new window now exists separately). To achieve
> this I had to create my own Window derived from QQuickWindow and expose
> requestActivation function to Qml. You must call it when dragging out tab.
> Otherwise, the new window activates itself, stealing focus and events.
>
> But after that I bumped into a few problems:
> 1. I cannot dock the object (being dragged) in any other window than the
> active one. Changing the active window stops the movement of my dragged
> window.
> 2. I cannot dock the Window in a dock area of another Window.
>
> A solution to this could be to manually start the drag -- by using
> startDrag() at Drag attached object of the dragged object (wicked drags!).
> But I cannot make the Window or the object to move as mouse moves. So I
> managed to only implement a drag without the object following the mouse
> (different cursor icon is the only visual indicator of the drag process).
>
> Eventually if dragging entire window is not possible maybe it's possible
> to set a pixmap for a drag (that will folow the mouse). I have seen that
> QDrag object (in C++ API) can have the pixmap set, however such possiblity
> seems to not be exposed to Qml.
>
> Cheers,
> Paweł
>
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