Class TAbstractSequencerNode
Unit
X3DNodes
Declaration
type TAbstractSequencerNode = class(TAbstractChildNode)
Description
Base node type from which all sequencers (like TIntegerSequencerNode and TBooleanSequencerNode) are derived.
Hierarchy
Overview
Methods
Properties
Description
Methods
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procedure SetCurrentKeyRange(const Value: Integer; const Time: TX3DTime); |
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procedure SendValueChanged(const ValueIndex: Integer; const Time: TX3DTime); virtual; abstract; |
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Override this is descendants to actually send value_changed event witk keyValue[ValueIndex]. You are guaranteed that ValueIndex is between 0 and FdKey.Count - 1, but you have to check yourself whether it's also between 0 and FdKeyValue.Count - 1 (although spec requires that key and keyValue fields have the same size, we have to protect against invalid files).
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procedure CreateNode; override; |
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Properties
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property CurrentKeyRange: Integer read FCurrentKeyRange; |
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In what key range we currently are. In other words, which keyValue was last send (passed to SendValueChanged).
We have to keep track of this information, per each node, as specification clearly says that value_changed should not be generated continously on each set_fraction, but only when value actually changes. (Although we make an exception for this with our extension FdForceContinousValue_Changed).
Valid values here are between -1 and FdKey.Count - 1. Values between 0 and FdKey.Count - 1 indicate which keyValue was last send. Value -1 means that SendValueChanged was not yet called, this is the default value (after construction).
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property EventSet_fraction: TSFFloatEvent read FEventSet_fraction; |
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property FdForceContinousValue_Changed: TSFBool read FFdForceContinousValue_Changed; |
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