It is possible to ask for splitting at an end point of the curve. This leads to
a `CADKernelError` and leaves us with a "hanging" clone. This check prevents that.
===================================
Changes from naked pointers to smart pointers are motivated to the use of functions that can reasonably throw under certain circumnstances (such as trim).
When introducing smart pointers, it is not necessary to explicitly delete the new geometry array at the end of the function.
When using the new facility to add a smart pointer geometry (previous commit), the copies generated in the split algorithm can be reused, which renders
keeping track of the new geometry for memory management unnecessary.
As geometry is added to the property which each call to addGeometry, the stored newIds can be reused if access is necessary to geometry pointers afterwards
(e.g. for constraint management).
================================================================
This new facility avoids to have to create a new copy() when a user copy is already created.
As the user copy is reused via move semantics, memory management is simplified.
CAVEAT: When this facility is used, the client code has to ensure whether a copy() or a clone() of the Part::Geometry
should be undertaken. The different between both is that the former creates a new uuid (tag), whereas the latter does not.
When `v == u` we want to "break" the b-spline at `u` (also OCC will raise an
exception if same parameter is provided).
The range of parameter can in general be different than 1.0, so use a general term.
=========================================================================
A migrated parabola cannot be openned with a previous version of FreeCAD. The user is notified upfront.
==============================
This commit provides specific behaviour on how to handle user messages signalled by App::Document for the different types of notifications.
For critical messages DURING a user initiated restore (i.e. only if the user clicked in the UI, not applicable for macros or Python initiated):
- The first critical message during restore requires user confirmation by clicking a button in a modal dialog box. The user has the choice to
request to be asked for confirmation for any subsequent critical message during restore or to forgo confirmation.
- If he chooses to forgo confirmation, subsequent critical messages are shown as auto-closing non-modal dialogs in a non-intrusive way. The user
can continue working while this information is shown. There is a maximum of auto-closing non-modal dialgos that can be enqueued. Over this maximum,
A warning pop up indicates this situation, referring to the Report View. No further auto-closing messages are enqueued until all existing messages
have disappeared. This is done to prevent overwhelming the user with notifications in cases where malfunction causes too many notifications to be
generated.
For any type of message OUTSIDE a user initiated restore:
- Messages are shown as non-intrusive non-modal auto-closing messages (it is not possible to generate modal/blocking messages outside a user
initiated restore).
- Messages are enqueued respecting a limit as above.
=======================================
Document provides a new functionality, to signal subscribed user code of messages intended for the user.
The main motivation is critical messages of broken forward compatibility during restoring a document into a new version of FreeCAD.
However, the framework may be used in many other ways.
=====================================================
Add Status bits. Currently only to mark whether an UI operation of restore was initiated by the user (via click in the open dialog or in the hyperlink of the shortcuts of the home page).
- the submenu ordering must be coherent to the one in the preferences combobox otherwise one gets the wrong orbit style displayed in the preferences dialog
- fix jumping direction field in dialogs
- apply default rotation to simple sections
- fix rounding error in vector widget
- remove "enter" button on CompassWidget
- add lost focus trap in event filter.
[TD]prevent recompute on cancel without change
