Class TAbstractKeyDeviceSensorNode
Unit
Declaration
type TAbstractKeyDeviceSensorNode = class(TAbstractSensorNode)
Description
Base type for all sensor node types that operate using key devices.
Hierarchy
- TObject
- TPersistent
- TX3DFileItem
- TX3DNode
- TAbstractNode
- TAbstractChildNode
- TAbstractSensorNode
- TAbstractKeyDeviceSensorNode
Overview
Methods
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procedure KeyDown(const Key: TKey; const KeyString: String; const Time: TX3DTime); virtual; |
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procedure KeyUp(const Key: TKey; const KeyString: String; const Time: TX3DTime); virtual; |
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procedure CreateNode; override; |
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class function ClassX3DType: String; override; |
Description
Methods
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procedure KeyDown(const Key: TKey; const KeyString: String; const Time: TX3DTime); virtual; |
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Send key down/up events. This is used internally by TCastleSceneCore to notify this key sensor that it should generate proper X3D events. Semantics follow TInputPressRelease behavior for EventType = itKey. This means that - Key may be keyNone (if not representable as TKey) - KeyString may be '' (if not representable as String) - But you cannot have both (Key=keyNone) and (KeyString='') at the same time. At least one of them must contain something useful. - key presses are affected by the "key repeat" feature of the OS (windowing system actually), so when user holds down a key — we get many key down messages. - KeyString is a UTF-8 encoded String representation of the key user pressed. | |
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procedure KeyUp(const Key: TKey; const KeyString: String; const Time: TX3DTime); virtual; |
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This item has no description. | |
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procedure CreateNode; override; |
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Create node fields and events. | |
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class function ClassX3DType: String; override; |
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This item has no description. Showing description inherited from TX3DNode.ClassX3DType. Node type name in VRML/X3D, for this class. Normal VRML/X3D node classes should override this to return something non-empty, and then X3DType automatically will return the same value. Empty for classes that don't have a hardcoded VRML/X3D node name, like a special TX3DUnknownNode. Such special classes should override then X3DType to return actual non-empty name there. You usually should call X3DType. The only use of this method is that it works on classes (it's "class function"), without needing at actual instance. | |
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