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
Note: This is purely the output of the chat conversation and does not contain any raw data, codebase snippets, etc. used to generate the output.
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.