Base class for all multiple-valued fields. More...
#include <Inventor/fields/SoMField.h>
Public Member Functions | |
int | getNum () const |
Returns the number of values currently in the field. | |
void | setNum (int num) |
Forces this field to have exactly num values, inserting or deleting values as necessary. | |
virtual void | deleteValues (int start, int num=-1) |
Deletes num values beginning at index start (index start through start + num -1 will be deleted, and any leftover values will be moved down to fill in the gap created). | |
virtual void | insertSpace (int start, int num) |
Inserts space for num values at index start . | |
SoNONUNICODE SbBool | set1 (int index, const char *valueString) |
This is equivalent to the set() method of SoField, but operates on only one value. | |
SbBool | set1 (int index, const SbString &valueString) |
This is equivalent to the set() method of SoField, but operates on only one value. | |
void | get1 (int index, SbString &valueString) |
This is equivalent to the get() method of SoField, but operates on only one value. | |
Public Member Functions inherited from SoField | |
void | setIgnored (SbBool ig) |
Sets the ignore flag for this field. | |
SbBool | isIgnored () const |
Gets the ignore flag for this field. | |
SbBool | isDefault () const |
Gets the state of default flag of the field. | |
void | enableConnection (SbBool flag) |
Field connections may be enabled and disabled. | |
SbBool | isConnectionEnabled () const |
Returns FALSE if connections to this field are disabled. | |
SbBool | connectFrom (SoEngineOutput *engineOutput) |
Connects this field from an engine output. | |
SbBool | connectFrom (SoField *field) |
Connects this field to another field. | |
SbBool | connectFrom (SoVRMLInterpOutput *interpOutput) |
Connects this field from an interpOutput. | |
SbBool | appendConnection (SoEngineOutput *engineOutput) |
Appends this field to the list of connections from another engineOutput. | |
SbBool | appendConnection (SoField *field) |
Appends this field to the list of connections from another field. | |
SbBool | appendConnection (SoVRMLInterpOutput *interpOutput) |
Appends this field to the list of connections from another interpOutput. | |
void | disconnect (SoEngineOutput *engineOutput) |
Disconnect the field from the requested engineOutput. | |
void | disconnect (SoField *field) |
Disconnect the field from the requested field. | |
void | disconnect (SoVRMLInterpOutput *interpOutput) |
Disconnect the field from the requested interpOutput. | |
int | getNumConnections () const |
Returns the number of connections to this field. | |
int | getConnections (SoFieldList &list) |
Returns a list of the connections to this field. | |
void | disconnect () |
Disconnect the field from whatever it was connected to. | |
SbBool | isConnected () const |
Returns TRUE if the field is connected to anything. | |
SbBool | isConnectedFromVRMLInterp () const |
Returns TRUE if the field is connected to a VRML interpOutput. | |
SbBool | isConnectedFromEngine () const |
Returns TRUE if the field is connected to an engine's output. | |
SbBool | isConnectedFromField () const |
Returns TRUE if the field is connected to another field. | |
SbBool | getConnectedEngine (SoEngineOutput *&engineOutput) const |
Returns TRUE if this field is being written into by an engine, and returns the engine output it is connected to in engineOutput. | |
SbBool | getConnectedField (SoField *&writingField) const |
Returns TRUE if this field is being written into by another field, and returns the field it is connected to in writingField. | |
SbBool | getConnectedVRMLInterp (SoVRMLInterpOutput *&interpOutput) const |
Returns the VRMLInterpolator output field is connected to. | |
int | getForwardConnections (SoFieldList &list) const |
Adds references to all of the fields that this field is writing into (either fields in nodes, global fields or engine inputs) to the given field list, and returns the number of forward connections. | |
SoFieldContainer * | getContainer () const |
Returns the object that contains this field. | |
SoNONUNICODE SbBool | set (const char *valueString) |
Sets the field to the given value, which is an ASCII string in the Open Inventor file format. | |
SbBool | set (const SbString &valueString) |
Sets the field to the given value, which is an ASCII string in the Open Inventor file format. | |
void | get (SbString &valueString) |
Returns the value of the field in the Open Inventor file format, even if the field has its default value. | |
virtual size_t | getValueSize () const |
Gets the size of the value. | |
virtual void | touch () |
Simulates a change to the field, causing attached sensors to fire, connected fields and engines to be marked as needing evaluation, and so forth. | |
int | operator== (const SoField &f) const |
Return TRUE if this field is of the same type and has the same value as f. | |
int | operator!= (const SoField &f) const |
Return FALSE if this field is of the same type and has the same value as f. | |
Public Member Functions inherited from SoTypedObject | |
virtual SoType | getTypeId () const =0 |
Returns the type identifier for a specific instance. | |
SbBool | isOfType (const SoType &type) const |
Returns TRUE if this object is of the type specified in type or is derived from that type. | |
template<typename TypedObjectClass > | |
SbBool | isOfType () const |
Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class. | |
Static Public Member Functions | |
static SoType | getClassTypeId () |
Return the type identifier for this field class. | |
Static Public Member Functions inherited from SoField | |
static SoType | getClassTypeId () |
Return the type identifier for this field class. | |
Static Public Member Functions inherited from SoTypedObject | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
Base class for all multiple-valued fields.
Each class derived from SoMField begins with an SoMF prefix and contains a dynamic array of values of a particular type. Each has a setValues() method that is passed an array of values of the correct type; these values are copied into the array in the field, making extra room in the array if necessary. The start and num parameters to this method indicate the starting array index to copy into and the number of values to copy.
The getValues() method for a multiple-value field returns a read-only array of values in the field. In addition, the indexing operator "[ ]" is overloaded to return the i 'th value in the array; because it returns a const reference, it can be used only to get values, not to set them.
Methods are provided for getting the number of values in the field, inserting space for new values in the middle, and deleting values.
There are other methods that allow you to set only one value of several in the field and to set the field to contain one and only one value.
Two other methods can be used to make several changes to a multiple-value field without the overhead of copying values into and out of the fields. The startEditing() method returns the internal array of values in the field. It can be used to change (but not add or remove) any values in the array. The finishEditing() method indicates that the editing is done and notifies any sensors or engines that may be connected to the field.
SoMFields are written to file as a series of values separated by commas, all enclosed in square brackets. If the field has no values (getNum() returns zero), then only the square brackets ("[ ]") are written. The last value may optionally be followed by a comma. Each field subtype defines how the values are written; for example, a field whose values are integers might be written as:
[ 1, 2, 3, 4 ]
or:
[ 1, 2, 3, 4, ]
Definition at line 134 of file SoMField.h.
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virtual |
Deletes num values beginning at index start (index start through start + num -1 will be deleted, and any leftover values will be moved down to fill in the gap created).
A num of -1 means delete all values from start to the last value in the field; getNum() will return start as the number of values in the field after this operation ( deleteValues(0, -1) empties the field ). However if num is greater than or equal to the number of values in the field, start is ignored and all values are deleted.
If the field's values are stored in an user data array and if the number of values to delete is not zero, a new array is allocated and the user data array is no longer used.
void SoMField::get1 | ( | int | index, |
SbString & | valueString | ||
) |
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static |
Return the type identifier for this field class.
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inline |
Returns the number of values currently in the field.
Definition at line 146 of file SoMField.h.
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virtual |
Inserts space for num values at index start .
Index start through start + num -1 will be moved up to make room. For example, to make room for 7 new values at the beginning of the field call insertSpace(0, 7) . If field's values are stored in an user data array and if the number of values to insert is not zero, a new array is allocated and the user's one is no more used.
SoNONUNICODE SbBool SoMField::set1 | ( | int | index, |
const char * | valueString | ||
) |
This is equivalent to the set() method of SoField, but operates on only one value.
See the SoField methods for details. If field's values are stored in an user data array and if specified index is greater than this array's length, a new array is allocated and the user's one is no more used.
Non Unicode: This function should not be used in a Unicode application.
void SoMField::setNum | ( | int | num | ) |
Forces this field to have exactly num values, inserting or deleting values as necessary.
If field's values are stored in an user data array and if specified number of values is different from this array's length, a new array is allocated and the user's one is no more used.