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docs(animations): add React and Angular examples for gesture animations #1721

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docs(animations): add React and Angular examples for gesture animations
dillionmegida Oct 15, 2020
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docs(animations): add example links to gesture page
dillionmegida Oct 16, 2020
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20 changes: 12 additions & 8 deletions src/pages/utilities/animations.md
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Original file line number Diff line number Diff line change
Expand Up @@ -671,18 +671,18 @@ ngOnInit() {
el: this.square.nativeElement,
threshold: 0,
gestureName: 'square-drag',
onMove: ev: this.onMove(ev),
onEnd: ev: this.onEnd(ev)
onMove: ev => this.onMove(ev),
onEnd: ev => this.onEnd(ev)
})

this.gesture.enable(true);
}

private onMove(ev) {
if (!started) {
if (!this.started) {
this.animation.progressStart();
this.started = true;
}
}

this.animation.progressStep(this.getStep(ev));
}
Expand All @@ -697,7 +697,7 @@ private onEnd(ev) {

this.animation
.progressEnd((shouldComplete) ? 1 : 0, step)
.onFinish((): { this.gesture.enable(true); });
.onFinish(() => { this.gesture.enable(true); });

this.initialStep = (shouldComplete) ? this.MAX_TRANSLATE : 0;
this.started = false;
Expand Down Expand Up @@ -726,6 +726,8 @@ class MyComponent extends React.Component<{}, any> {
private gesture?: Gesture;
private started: boolean = false;
private initialStep: number = 0;

MAX_TRANSLATE = 200

constructor(props: any) {
super(props);
Expand Down Expand Up @@ -788,13 +790,13 @@ class MyComponent extends React.Component<{}, any> {
}, opts: { oneTimeCallback: true }}
});

this.initialStep = (shouldComplete) ? MAX_TRANSLATE : 0;
this.initialStep = (shouldComplete) ? this.MAX_TRANSLATE : 0;
this.started = false;
}

private getStep(ev: GestureDetail) {
const delta = this.initialStep + ev.deltaX;
return this.clamp(0, delta / MAX_TRANSLATE, 1);
return this.clamp(0, delta / this.MAX_TRANSLATE, 1);
}

private clamp(min: number, n: number, max: number) {
Expand All @@ -815,7 +817,7 @@ class MyComponent extends React.Component<{}, any> {
fromTo={{
property: 'transform',
fromValue: 'translateX(0)',
toValue: `translateX(${MAX_TRANSLATE}px)`
toValue: `translateX(${this.MAX_TRANSLATE}px)`
}}>
<div className="square"></div>
</CreateAnimation>
Expand All @@ -828,6 +830,8 @@ class MyComponent extends React.Component<{}, any> {
</docs-tab>
</docs-tabs>

You can view a live example of this in Angular [here](https://stackblitz.com/edit/ionic-angular-gesture-animations) and in React [here](https://stackblitz.com/edit/ionic-react-gesture-animations).

In this example we are creating a track along which we can drag the `.square` element. Our `animation` object will take care of moving the `.square` element either left or right, and our `gesture` object will instruct the `animation` object which direction to move in.

<docs-codepen user="ionic" slug="jONxzRL"></docs-codepen>
Expand Down
2 changes: 2 additions & 0 deletions src/pages/utilities/gestures.md
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Expand Up @@ -313,6 +313,8 @@ In the example above, we want to be able to detect double clicks on an element.

See our guide on implementing gesture animations: [Gesture Animations with Ionic Animations](/docs/utilities/animations#gesture-animations)

You can live examples of Gesture animations in Angular [here](https://stackblitz.com/edit/ionic-angular-gesture-animations) and in React [here](https://stackblitz.com/edit/ionic-react-gesture-animations).

## Browser Support

| Browser/Platform | Supported Versions |
Expand Down