Overlay Editor
Overlay Editor is a
2D Editor, so it interacts with the end user at runtime to allow direct modification of a 2D
Model. Overlays are useful for interactively defining selection areas more cmplex than a rectangle.
Access to a 2D editor is implemented via
I2DEditor_DG. See
Overlay topic about obtaining this interface.
Call I2DEditor_DG.GetEditableObject()
to obtain IEntity_DG of the overlay. Query
IModel2d_DG from IEntity_DG of the overlay to
access its 2D geometry. Use methods of
IModel2d_DG to modify structure
of the 2D model and parametrs of its items and elements. More details.
Event Notifcations
To notify the application about different actions by the end user, 2D editors
raise DgkMisc events
with the DgkMiscEventArgs.eventType parameter set to
Event_DG.TwoDimEditor. The
DgkMiscEventArgs.param0 member is an integer with value one of
EditorEvent_DG:
|
ID |
Event |
Raised |
|
Activated |
The editor has been activated |
Always |
|
ModelStructureChanged |
A new item aded to the 2D model or deleted |
If context boolean parameter 0 is true. See below |
|
ItemStructureChanged |
Number of elements in an item has chanded. New element added or deleted |
If context boolean parameter 1 is true. See below |
|
Closing |
The editor is about to be closed |
Always |
For performance frequent events ModelStructureChanged and
EventItemStructureChanged are not raised by default. They have to be
requested with:
Query IContext_DGt from
I2DEditor_DG. Call
IContext_DG.SetBool(0, true) to
request
ModelStructureChanged. Call
IContext_DG.SetBool(1, true) to
request
ItemStructureChanged.
|