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Refactor to functional component #1

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merged 1 commit into from
Oct 3, 2025
Merged

Refactor to functional component #1

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148 changes: 65 additions & 83 deletions examples/App.tsx
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
import React, { JSX } from 'react';
import { StyleSheet, Text, View } from 'react-native';
import React, { JSX, useState } from 'react';
import { StyleSheet, Text, View, useColorScheme } from 'react-native';
import DropDownPicker, { ItemType } from 'react-native-dropdown-picker';
import JavascriptClassExample from './example-src-files/javascript-class-example';
import JavascriptFunctionExample from './example-src-files/javascript-function-example';
Expand All @@ -19,15 +19,19 @@ enum ExampleComponent {
}

const styles = StyleSheet.create({
container: {
page: {
flex: 1,
// backgroundColor: "#fff",
// alignItems: "center",
// justifyContent: "center",
justifyContent: 'center',
alignItems: 'center',
width: '100%',
height: '100%',
},
container: {
flexDirection: 'column',
margin: 3,
margin: 'auto',
marginTop: 20,
padding: 3,
maxWidth: 400,
},
});

Expand Down Expand Up @@ -66,98 +70,76 @@ const EXAMPLE_COMPONENT_ITEMS: Array<ItemType<ExampleComponent>> = [
},
];

type Props = Record<string, never>;

interface State {
currentExample: ExampleComponent;
examplePickerOpen: boolean;
exampleComponents: Array<ItemType<ExampleComponent>>;
}

export default class App extends React.Component<Props, State> {
constructor(props: Readonly<Props>) {
super(props);
this.state = {
currentExample: ExampleComponent.JavaScriptClassSingleValue,
exampleComponents: EXAMPLE_COMPONENT_ITEMS,
examplePickerOpen: false,
};

this.setOpen = this.setOpen.bind(this);
this.setCurrentExample = this.setCurrentExample.bind(this);
}

private static getExample(egComponent: ExampleComponent): JSX.Element {
switch (egComponent) {
case ExampleComponent.JavaScriptClassSingleValue:
return <JavascriptClassExample multiple={false} />;
case ExampleComponent.JavaScriptClassMultiValue:
return <JavascriptClassExample multiple />;
case ExampleComponent.JavaScriptFunctionSingleValue:
return <JavascriptFunctionExample multiple={false} />;
case ExampleComponent.JavaScriptFunctionMultiValue:
return <JavascriptFunctionExample multiple />;
case ExampleComponent.TypeScriptClassSingleValue:
return <TypescriptClassExample multiple={false} />;
case ExampleComponent.TypeScriptClassMultiValue:
return <TypescriptClassExample multiple />;
case ExampleComponent.TypeScriptFunctionSingleValue:
return <TypescriptFunctionExample multiple={false} />;
case ExampleComponent.TypeScriptFunctionMultiValue:
return <TypescriptFunctionExample multiple />;
default:
throw new Error(
"couldn't match example component in getExample() in App.tsx. egComponent was: ",
egComponent,
);
}
const getExample = (egComponent: ExampleComponent): JSX.Element => {
switch (egComponent) {
case ExampleComponent.JavaScriptClassSingleValue:
return <JavascriptClassExample multiple={false} />;
case ExampleComponent.JavaScriptClassMultiValue:
return <JavascriptClassExample multiple />;
case ExampleComponent.JavaScriptFunctionSingleValue:
return <JavascriptFunctionExample multiple={false} />;
case ExampleComponent.JavaScriptFunctionMultiValue:
return <JavascriptFunctionExample multiple />;
case ExampleComponent.TypeScriptClassSingleValue:
return <TypescriptClassExample multiple={false} />;
case ExampleComponent.TypeScriptClassMultiValue:
return <TypescriptClassExample multiple />;
case ExampleComponent.TypeScriptFunctionSingleValue:
return <TypescriptFunctionExample multiple={false} />;
case ExampleComponent.TypeScriptFunctionMultiValue:
return <TypescriptFunctionExample multiple />;
default:
throw new Error(
"couldn't match example component in getExample() in App.tsx. egComponent was: ",
egComponent,
);
}

setOpen(examplePickerOpen: boolean): void {
this.setState({ examplePickerOpen });
}

setCurrentExample(
callback: (prevState: ExampleComponent | null) => ExampleComponent | null,
): void {
this.setState((state: Readonly<State>) => ({
currentExample: callback(state.currentExample),
}));
}

// todo: fix picker items being under text

render(): JSX.Element {
const { currentExample, examplePickerOpen, exampleComponents } = this.state;

return (
<GestureHandlerRootView style={{ flex: 1 }}>
};

export default function App(): JSX.Element {
const [currentExample, setCurrentExample] = useState<ExampleComponent>(
ExampleComponent.JavaScriptClassSingleValue
);
const [examplePickerOpen, setOpen] = useState<boolean>(false);
const [exampleComponents] = useState<Array<ItemType<ExampleComponent>>>(
EXAMPLE_COMPONENT_ITEMS
);

const colorScheme = useColorScheme();
const backgroundColor = colorScheme === 'dark' ? '#222' : '#fff';

return (
<GestureHandlerRootView style={{ flex: 1 }}>
<View style={{
...styles.page,
backgroundColor,
}}>
<View style={styles.container}>
<View style={{ flex: 1 }}>
<View style={{ flex: 1 }}>
<View style={{ marginBottom: 32 }}>
<View style={{ marginBottom: 32 }}>
<Text>Choose example:</Text>
</View>

<View style={{ flex: 1 }}>
<View style={{ marginBottom: 32 }}>
<DropDownPicker
setValue={this.setCurrentExample}
setValue={setCurrentExample}
value={currentExample}
items={exampleComponents}
open={examplePickerOpen}
setOpen={this.setOpen}
setOpen={setOpen}
/>
</View>
</View>

<View style={{ flex: 3 }}>
<View style={{ flex: 1 }}>
<View style={{ marginBottom: 32 }}>
<View style={{ marginBottom: 32 }}>
<Text>Example:</Text>
</View>

{App.getExample(currentExample)}
{getExample(currentExample)}
</View>
</View>
</GestureHandlerRootView>
);
}
</View>
</GestureHandlerRootView>
);
}