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Add support for "direction" property on <TextLoop> element #64

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Add support for "direction" property on <TextLoop> element #64

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9f4ef8b
Reverse spring motion direction
jaredsilver Nov 13, 2020
316909c
add "direction" property: "up"/"down"
leggetter Mar 20, 2021
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22 changes: 22 additions & 0 deletions examples/App.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,25 @@ const BaseExample: React.FunctionComponent = (): JSX.Element => (
</Section>
);

const DirectionExample: React.FunctionComponent = (): JSX.Element => (
<Section>
<Title>Default</Title>
<Example>
<TextLoop direction="down">
<span>Trade faster</span>
<span>Increase sales</span>
<span>Stock winners</span>
</TextLoop>{" "}
and{" "}
<TextLoop direction="up">
<span>be awesome</span>
<span>win big</span>
<span>live the dream</span>
</TextLoop>
</Example>
</Section>
);

const FastExample: React.FunctionComponent = (): JSX.Element => (
<Section>
<Title>Fast transition</Title>
Expand Down Expand Up @@ -178,6 +197,7 @@ const StaggeredExample: React.FunctionComponent = (): JSX.Element => (

enum Sections {
Base,
Direction,
Fast,
Smooth,
Variable,
Expand All @@ -191,6 +211,7 @@ const App: React.FunctionComponent = (): JSX.Element => {

const mapSectionToComponent = {
[Sections.Base]: BaseExample,
[Sections.Direction]: DirectionExample,
[Sections.Fast]: FastExample,
[Sections.Smooth]: SmoothExample,
[Sections.Variable]: VariableExample,
Expand All @@ -210,6 +231,7 @@ const App: React.FunctionComponent = (): JSX.Element => {
}}
>
<option value={Sections.Base}>Default</option>
<option value={Sections.Direction}>Direction</option>
<option value={Sections.Fast}>Fast</option>
<option value={Sections.Smooth}>Smooth</option>
<option value={Sections.Variable}>Variable</option>
Expand Down
8 changes: 6 additions & 2 deletions src/components/TextLoop.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ type Props = {
noWrap: boolean;
className?: string;
onChange?: Function;
direction: "up" | "down";
};

type State = {
Expand Down Expand Up @@ -50,6 +51,7 @@ class TextLoop extends React.PureComponent<Props, State> {
fade: true,
mask: false,
noWrap: true,
direction: "up",
};

constructor(props: Props) {
Expand Down Expand Up @@ -136,19 +138,21 @@ class TextLoop extends React.PureComponent<Props, State> {
willLeave = (): { opacity: OpaqueConfig; translate: OpaqueConfig } => {
const { height } = this.getDimensions();

const dirAdjust = this.props.direction === "up" ? -1 : 1;
return {
opacity: spring(this.getOpacity(), this.props.springConfig),
translate: spring(-height, this.props.springConfig),
translate: spring(height * dirAdjust, this.props.springConfig),
};
};

// Fade in animation
willEnter = (): { opacity: 0 | 1; translate: number } => {
const { height } = this.getDimensions();

const dirAdjust = this.props.direction === "up" ? 1 : -1;
return {
opacity: this.getOpacity(),
translate: height,
translate: height * dirAdjust,
};
};

Expand Down