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fix jump on first press #37

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fix jump on first press #37

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5 changes: 3 additions & 2 deletions src/ImageView.js
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ const SCALE_MAXIMUM = 5;
const HEADER_HEIGHT = 60;
const SCALE_MAX_MULTIPLIER = 3;
const FREEZE_SCROLL_DISTANCE = 15;
const PRESS_TOLLERANCE = 5;
const BACKGROUND_OPACITY_MULTIPLIER = 0.003;
const defaultBackgroundColor = [0, 0, 0];

Expand Down Expand Up @@ -340,8 +341,8 @@ export default class ImageView extends Component<PropsType, StateType> {
const backgroundOpacity = Math.abs(
dy * BACKGROUND_OPACITY_MULTIPLIER
);

this.imageTranslateValue.y.setValue(y + dy);
const justPressed = Math.abs(dy) < PRESS_TOLLERANCE;
justPressed ? null : this.imageTranslateValue.y.setValue(y + dy)
this.modalBackgroundOpacity.setValue(
backgroundOpacity > 1 ? 1 : backgroundOpacity
);
Expand Down