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31 lines
1.1 KiB
Haxe
31 lines
1.1 KiB
Haxe
package funkin.ui.debug.charting.commands;
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/**
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* Actions in the chart editor are backed by the Command pattern
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* (see Bob Nystrom's book "Game Programming Patterns" for more info)
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*
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* To make a functionality compatible with the undo/redo history, create a new class
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* that implements ChartEditorCommand, then call `ChartEditorState.performCommand(new Command())`
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*/
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interface ChartEditorCommand
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{
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/**
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* Calling this function should perform the action that this command represents.
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* @param state The ChartEditorState to perform the action on.
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*/
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public function execute(state:ChartEditorState):Void;
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/**
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* Calling this function should perform the inverse of the action that this command represents,
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* effectively undoing the action. Assume that the original action was the last action performed.
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* @param state The ChartEditorState to undo the action on.
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*/
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public function undo(state:ChartEditorState):Void;
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/**
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* Get a short description of the action (for the UI).
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* For example, return `Add Left Note` to display `Undo Add Left Note` in the menu.
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*/
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public function toString():String;
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}
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