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Rework zooming

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Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>
This commit is contained in:
Šimon Brandner 2021-04-24 10:36:53 +02:00
parent 90f2423eb7
commit 0e312977e3
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GPG key ID: 9760693FDD98A790
1 changed files with 26 additions and 39 deletions
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65
src/components/views/elements/ImageView.tsx
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@ -136,20 +136,8 @@ export default class ImageView extends React.Component<IProps, IState> {
});
}
private onKeyDown = (ev: KeyboardEvent) => {
if (ev.key === Key.ESCAPE) {
ev.stopPropagation();
ev.preventDefault();
this.props.onFinished();
}
};
private onWheel = (ev: WheelEvent) => {
ev.stopPropagation();
ev.preventDefault();
const {deltaY} = normalizeWheelEvent(ev);
const newZoom = this.state.zoom - (deltaY * ZOOM_COEFFICIENT);
private zoom(delta: number) {
const newZoom = this.state.zoom + delta;
if (newZoom <= this.state.minZoom) {
this.setState({
@ -167,6 +155,30 @@ export default class ImageView extends React.Component<IProps, IState> {
this.setState({
zoom: newZoom,
});
}
private onWheel = (ev: WheelEvent) => {
ev.stopPropagation();
ev.preventDefault();
const {deltaY} = normalizeWheelEvent(ev);
this.zoom(-(deltaY * ZOOM_COEFFICIENT));
};
private onZoomInClick = () => {
this.zoom(ZOOM_STEP);
};
private onZoomOutClick = () => {
this.zoom(-ZOOM_STEP);
};
private onKeyDown = (ev: KeyboardEvent) => {
if (ev.key === Key.ESCAPE) {
ev.stopPropagation();
ev.preventDefault();
this.props.onFinished();
}
};
private onRotateCounterClockwiseClick = () => {
@ -181,31 +193,6 @@ export default class ImageView extends React.Component<IProps, IState> {
this.setState({ rotation: rotationDegrees });
};
private onZoomInClick = () => {
if (this.state.zoom >= this.state.maxZoom) {
this.setState({zoom: this.state.maxZoom});
return;
}
this.setState({
zoom: this.state.zoom + ZOOM_STEP,
});
};
private onZoomOutClick = () => {
if (this.state.zoom <= this.state.minZoom) {
this.setState({
zoom: this.state.minZoom,
translationX: 0,
translationY: 0,
});
return;
}
this.setState({
zoom: this.state.zoom - ZOOM_STEP,
});
};
private onDownloadClick = () => {
const a = document.createElement("a");
a.href = this.props.src;