# Entity Ops Definition
The right-click menu of an item or object.

Beyond the five plain operations an entity can have submenus, and operations that only appear
while a varp or varbit sits inside a given range - which is how a door offers `Open` or `Close`
but never both.


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## EntityOpsDefinition.SetOp
```pascal
procedure TEntityOpsDefinition.SetOp(index: Integer; text: String);
```
Sets the text of the operation at `index`, replacing it if that slot already has one.

`index` is the operation's place in the right-click menu, not its place in `Ops`, which only
holds the slots that are actually filled.


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## EntityOpsDefinition.DecodeOp
```pascal
procedure TEntityOpsDefinition.DecodeOp(const data: TByteArray; var offset: Integer; index: Integer);
```
Reads one menu operation into slot `index`.

The text `hidden` is how the cache says a slot inherited from a template should be blanked out
rather than shown, so it is read and dropped.


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## EntityOpsDefinition.DecodeSubOp
```pascal
procedure TEntityOpsDefinition.DecodeSubOp(const data: TByteArray; var offset: Integer);
```
Reads one entry of a submenu: which operation it hangs off, its place within that submenu, and
its text.


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## EntityOpsDefinition.DecodeConditionalOp
```pascal
procedure TEntityOpsDefinition.DecodeConditionalOp(const data: TByteArray; var offset: Integer);
```
Reads an operation that only appears while a varp or varbit sits inside a given range - a door
that offers `Close` only once it is open, for instance.


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## EntityOpsDefinition.DecodeConditionalSubOp
```pascal
procedure TEntityOpsDefinition.DecodeConditionalSubOp(const data: TByteArray; var offset: Integer);
```
{ref}`TEntityOpsDefinition.DecodeConditionalOp` for a submenu entry, so it carries the submenu
position as well as the varp range that gates it.