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SignaturePad.js
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SignaturePad.js
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const React = require('react')
const {
UIManager,
View,
findNodeHandle,
requireNativeComponent,
} = require('react-native')
const PropTypes = require('prop-types')
const nativeComponentName = "TRNSignaturePad"
const TRNSignaturePad = requireNativeComponent(nativeComponentName, SignaturePad, {
nativeOnly: { onChange: true }
});
const eventTypes = {
onSave: "onSave",
onDragStart: "onDragStart",
onDragEnd: "onDragEnd",
}
const commandNames = {
save: "saveImage",
reset: "resetImage",
}
class SignaturePad extends React.Component {
constructor(props) {
super(props)
this.dispatchCommand = this.dispatchCommand.bind(this)
this.handleSaveEvent = this.handleSaveEvent.bind(this)
this.handleChange = this.handleChange.bind(this)
}
dispatchCommand(commandName) {
const viewManagerConfig = "getViewManagerConfig" in UIManager
? UIManager.getViewManagerConfig(nativeComponentName)
: UIManager[nativeComponentName]
UIManager.dispatchViewManagerCommand(
findNodeHandle(this),
viewManagerConfig.Commands[commandName],
[],
)
}
saveImage() {
this.dispatchCommand(commandNames.save)
}
resetImage() {
this.dispatchCommand(commandNames.reset)
}
handleChange(event) {
const { onSave, onDragEnd, onDragStart } = this.props
const { nativeEvent: { eventType, ...eventArgs } } = event
switch (eventType) {
case eventTypes.onSave:
onSave(eventArgs)
break
case eventTypes.onDragStart:
onDragStart()
break
case eventTypes.onDragEnd:
onDragEnd()
break
default:
return
}
}
handleSaveEvent(event) {
const { nativeEvent } = event
const { onSave } = this.props
onSave(nativeEvent)
}
render() {
const { onDragStart, onDragEnd } = this.props
return (
<TRNSignaturePad
{...this.props}
onSignStart={onDragStart}
onSignEnd={onDragEnd}
onSaveEvent={this.handleSaveEvent}
onChange={this.handleChange}
/>
)
}
}
SignaturePad.propTypes = {
...View.propTypes,
rotateClockwise: PropTypes.bool,
square: PropTypes.bool,
saveImageFileInExtStorage: PropTypes.bool,
viewMode: PropTypes.oneOf(["portrait", "landscape"]),
showBorder: PropTypes.bool,
showNativeButtons: PropTypes.bool,
showTitleLabel: PropTypes.bool,
maxSize: PropTypes.number,
minStrokeWidth: PropTypes.number,
maxStrokeWidth: PropTypes.number,
strokeColor: PropTypes.string,
backgroundColor: PropTypes.string,
compressionQuality: PropTypes.number,
outputFormat: PropTypes.oneOf(['png', 'jpg']),
onSave: PropTypes.func,
onDragStart: PropTypes.func,
onDragEnd: PropTypes.func,
}
SignaturePad.defaultProps = {
rotateClockwise: false,
square: false,
saveImageFileInExtStorage: false,
viewMode: "portrait",
showBorder: false,
showNativeButtons: false,
showTitleLabel: false,
strokeColor: "#000000",
backgroundColor: "#FFFFFF",
compressionQuality: 1,
outputFormat: "png",
onSave: () => null,
onDragStart: () => null,
onDragEnd: () => null,
}
export default SignaturePad