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Implement zooming

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Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>
This commit is contained in:
Šimon Brandner 2020-12-19 10:20:15 +01:00
parent 8aabe1f330
commit 2040815f66
1 changed files with 39 additions and 6 deletions
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45
src/components/views/elements/ImageView.js
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@ -46,7 +46,10 @@ export default class ImageView extends React.Component {
constructor(props) {
super(props);
this.state = { rotationDegrees: 0 };
this.state = {
rotationDegrees: 0,
zoom: 100,
};
}
onKeyDown = (ev) => {
@ -57,6 +60,16 @@ export default class ImageView extends React.Component {
}
};
onWheel = (ev) => {
if (ev.ctrlKey) {
ev.stopPropagation();
ev.preventDefault();
this.setState({
zoom: this.state.zoom - ev.deltaY,
});
}
}
onRedactClick = () => {
const ConfirmRedactDialog = sdk.getComponent("dialogs.ConfirmRedactDialog");
Modal.createTrackedDialog('Confirm Redact Dialog', 'Image View', ConfirmRedactDialog, {
@ -98,6 +111,18 @@ export default class ImageView extends React.Component {
this.setState({ rotationDegrees });
};
zoomIn = () => {
this.setState({
zoom: this.state.zoom + 10,
});
};
zoomOut = () => {
this.setState({
zoom: this.state.zoom - 10,
});
}
render() {
/*
// In theory max-width: 80%, max-height: 80% on the CSS should work
@ -130,12 +155,13 @@ export default class ImageView extends React.Component {
let style = {};
let res;
style = {
width: this.state.zoom + "%",
height: this.state.zoom + "%",
};
if (this.props.width && this.props.height) {
style = {
width: this.props.width,
height: this.props.height,
};
res = style.width + "x" + style.height + "px";
res = this.props.width + "x" + this.props.height + "px";
}
let size;
@ -190,6 +216,7 @@ export default class ImageView extends React.Component {
returnFocus={true}
lockProps={{
onKeyDown: this.onKeyDown,
onWheel: this.onWheel,
role: "dialog",
}}
className="mx_ImageView"
@ -204,6 +231,12 @@ export default class ImageView extends React.Component {
<span className="mx_ImageView_size">{ sizeRes }</span>
</div>
<div className="mx_ImageView_toolbar">
<AccessibleButton className="mx_ImageView_button" title={_t("Zoom in")} onClick={ this.zoomIn }>
<img src={require("../../../../res/img/plus.svg")} alt={ _t('Zoom in') } width="18" height="18" />
</AccessibleButton>
<AccessibleButton className="mx_ImageView_button" title={_t("Zoom out")} onClick={ this.zoomOut }>
<img src={require("../../../../res/img/rotate-ccw.svg")} alt={ _t('Zoom out') } width="18" height="18" />
</AccessibleButton>
<AccessibleButton className="mx_ImageView_button" title={_t("Rotate Left")} onClick={ this.rotateCounterClockwise }>
<img src={require("../../../../res/img/rotate-ccw.svg")} alt={ _t('Rotate counter-clockwise') } width="18" height="18" />
</AccessibleButton>