2024 06 02 function signature mismatch in react components callback function onready - bizkite-co/handterm GitHub Wiki


original file name: Codeium Chat - u63pFJS096UaTmYYYL0QHYhqlBNVnMe5.md summary: The chat discussed an issue where a function signature mismatch occurred in a React component. The user had a callback function onReady expecting a function with parameters (draw: (position: Position) => void, setFrameIndex: React.Dispatch<number>), but the this.drawHero function was defined with a different signature (context: CanvasRenderingContext2D, position: Position) => void. Suggestions were provided to align the onReady callback signature to accept both CanvasRenderingContext2D and Position parameters to match the this.drawHero function's expected signature. Further clarification was sought from the user regarding the interface ICharacterActionComponentProps to resolve the issue. date: 2024-06-02T09:13

Codeium Chat Conversation

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User at 9:13 am, Jun 2, 2024

Explain problem: Type '(position: Position) => void' is not assignable to type '(context: CanvasRenderingContext2D, position: Position) => void'. Types of parameters 'position' and 'context' are incompatible. Type 'CanvasRenderingContext2D' is missing the following properties from type 'Position': leftX, topY


Codeium at 9:13 am, Jun 2, 2024

The issue you're facing is that the onReady callback function you're assigning to this.drawHero is expecting a function with a parameter (position: Position) => void, but this.drawHero is defined as (context: CanvasRenderingContext2D, position: Position) => void.

To resolve this, you need to update the signature of the onReady callback function in your CharacterActionComponent to accept both CanvasRenderingContext2D and Position parameters.

Here's how you can update the onReady callback in your CharacterActionComponent:

onReady={(draw: (context: CanvasRenderingContext2D, position: Position) => void) => {
  this.drawHero = draw;
}}

By updating the onReady callback signature to accept both CanvasRenderingContext2D and Position parameters, you align it with the expected signature for this.drawHero.


User at 9:17 am, Jun 2, 2024

In my CharacterActionComponent I have:

interface ICharacterActionComponentProps {
 onReady: (
  draw: (position: Position) => void,
  setFrameIndex: React.Dispatch<React.SetStateAction<number>>
 ) => void;
 baseCharacter: BaseCharacter;
 currentActionType: ActionType;
 position: { leftX: number; topY: number };
 onPositionChange: (newPosition: { leftX: number; topY: number }) => void;
};

The onReady definition does not expect a context parameter, as far as I can tell.


Codeium at 9:17 am, Jun 2, 2024

Based on the ICharacterActionComponentProps interface you provided, the onReady prop is indeed expecting a function that takes two parameters: draw which is a function that takes a Position object and setFrameIndex which is a React dispatch function for updating state.

The error message you're seeing suggests that somewhere in your code, likely where this.drawHero is being used, it is expected to be a function that takes two parameters: a CanvasRenderingContext2D and a Position. However, this.drawHero is being set to a function that only takes a Position based on the onReady prop's type.

To resolve the issue, you need to make sure that the draw function provided to onReady matches the expected usage of this.drawHero. This might involve updating the onReady prop type to include the CanvasRenderingContext2D parameter, or adjusting the code where this.drawHero is called to match the current onReady type.

If this.drawHero should indeed take a CanvasRenderingContext2D and a Position, you would need to update the onReady prop type accordingly:

interface ICharacterActionComponentProps {
  onReady: (
    draw: (context: CanvasRenderingContext2D, position: Position) => void,
    setFrameIndex: React.Dispatch<React.SetStateAction<number>>
  ) => void;
  // ... other properties
}

And ensure that the draw function provided to onReady matches this signature. If you need further assistance, please provide the code where this.drawHero is called or defined.

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