| SoScreenDrawer Class |
Base class to draw a scene graph in screen space.
Inheritance HierarchyOIV.InventorSoNetBase
OIV.InventorSoDisposable
OIV.Inventor.MiscSoBase
OIV.Inventor.FieldsSoFieldContainer
OIV.Inventor.NodesSoNode
OIV.Inventor.DrawersSoScreenDrawer
OIV.Inventor.DrawersSoPolyLineScreenDrawer
Namespace: OIV.Inventor.Drawers
Assembly: OIV.Inventor (in OIV.Inventor.dll) Version: 9.9.36.0 (9.9.36.0)
SyntaxThe SoScreenDrawer type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | SoScreenDrawer | Constructor. |
Methods| Name | Description | |
|---|---|---|
| AffectsState | Returns true if a node has an effect on the state during traversal. |
| Callback | (Overrides SoNodeCallback(SoCallbackAction).) |
| Copy | Calls Copy(false). (Inherited from SoNode.) |
| Copy(Boolean) | Creates and returns an exact copy of the node. |
| CopyFieldValues(SoFieldContainer) | Calls CopyFieldValues(fc, false). (Inherited from SoFieldContainer.) |
| CopyFieldValues(SoFieldContainer, Boolean) | Copies the contents of fc's fields into this object's fields. |
| Dispose |
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.) |
| Distribute | (Inherited from SoNode.) |
| DoAction | (Overrides SoNodeDoAction(SoAction).) |
| EnableNotify | Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false). |
| Equals | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
| FieldsAreEqual | Returns true if this object's fields are exactly equal to fc's fields. |
| Get | Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string. |
| GetAllFields | Returns a list of fields, including the eventIn's and eventOut's. |
| GetAlternateRep | This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type). |
| GetBoundingBox | (Overrides SoNodeGetBoundingBox(SoGetBoundingBoxAction).) |
| GetEventIn | Returns a the eventIn with the given name. |
| GetEventOut | Returns the eventOut with the given name. |
| GetField | Returns a the field of this object whose name is fieldName. |
| GetFieldName | Returns the name of the given field in the fieldName argument. |
| GetFields | Appends references to all of this object's fields to resultList, and returns the number of fields appended. |
| GetHashCode |
Overrides GetHashCode().
(Inherited from SoNetBase.) |
| GetMatrix | (Inherited from SoNode.) |
| GetName | Returns the name of an instance. |
| GetPrimitiveCount | (Overrides SoNodeGetPrimitiveCount(SoGetPrimitiveCountAction).) |
| GetRenderUnitID | (Inherited from SoNode.) |
| GetStringName | (Inherited from SoBase.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| GLRender | (Overrides SoNodeGLRender(SoGLRenderAction).) |
| GLRenderBelowPath | (Inherited from SoNode.) |
| GLRenderInPath | (Inherited from SoNode.) |
| GLRenderOffPath | (Inherited from SoNode.) |
| GrabEventsCleanup | (Inherited from SoNode.) |
| GrabEventsSetup | (Inherited from SoNode.) |
| HandleEvent | Traversal routine for SoHandleEventAction - this will call action->setHandled() if the event is handled. |
| HasDefaultValues | Returns true if all of the object's fields have their default values. |
| IsBoundingBoxIgnoring | This method is used by getBoundingBox action traversal to know if the current node must be traversed or not, ie the bounding should be ignored. |
| IsNotifyEnabled | Notification is the process of telling interested objects that this object has changed. |
| IsOverride | Returns the state of the override flag. |
| IsSynchronizable | Gets the ScaleViz synchronizable state of this object. |
| NormalizePoint | Returns position normalized in range -1..1 relative to specified viewport. |
| Pick | (Inherited from SoNode.) |
| RayPick | (Overrides SoNodeRayPick(SoRayPickAction).) |
| Search | (Inherited from SoNode.) |
| Set | Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format. |
| SetName | (Inherited from SoBase.) |
| SetOverride | Turns the override flag on or off. |
| SetSynchronizable | Sets this to be a ScaleViz synchronizable object. |
| SetToDefaults | Sets all fields in this object to their default values. |
| ToString |
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.) |
| Touch | Marks an instance as modified, simulating a change to it. |
| Write | (Inherited from SoNode.) |
Properties| Name | Description | |
|---|---|---|
 | IsDisposable | ISafeDisposable interface implementation.
(Inherited from SoDisposable.) |
| sceneGraph | Scene graph to render. |
| UserData |
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.) |
RemarksThis node displays the scene graph specified by the sceneGraph field in screen space normalized in the range ([-1, 1]x[-1, 1]x[-1, 1]) relative to the current viewport.
The specified scene graph is automatically rendered using an SoAnnotation node, an SoPickStyle node with style = UNPICKABLE, and an SoOrthographicCamera node.
Classes derived from SoScreenDrawer are normally used to implement dynamically drawing a 2D shape, for example a rectangle, in response to mouse events. Applications will typically use one of these derived classes, for example, SoEllipseScreenDrawer, SoRectangleScreenDrawer, SoPolygonScreenDrawer or SoLassoScreenDrawer.
Please see SoPolyLineScreenDrawer for important notes about these classes and a code example.
Applications may also implement their own custom screen drawer classes. The convenient onMouseDown(), onMouseMove(), ... methods can be implemented by sub-classes to customize behaviors for specific events, but the application can also reimplement the handleEvent() method to handle any event.
There should only be one SoScreenDrawer derived node in the sceneGraph (to avoid conflicts in mouse events).
NOTE: This node and its subclasses use screen coordinates ranging from -1 to 1. (Because this is the default view volume for an SoOrthographicCamera node.) Be careful because other classes in Open Inventor use normalized screen coordinates ranging from 0 to 1. In particular the SbViewportRegion normalize() method and the SbViewVolume methods that project from 3D to 2D and vice-versa.
See Also