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Canvas zooming (#716)

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* Zoom icons.

* Actions.

* Min zoom of 0 does not make sense.

* Zoom logic.

* Modify how zoom affects selection rendering.

* More precise scrollbar dimensions.

* Adjust elements visibility and scrollbars.

* Normalized canvas width and height.

* Apply zoom to resize test.

* [WIP] Zoom using canvas center as an origin.

* Undo zoom on `getScrollBars`.

* WIP: center zoom origin via scroll

* This was wrong for sure.

* Finish scaling using center as origin.

* Almost there.

* Scroll offset should be not part of zoom transforms.

* Better naming.

* Wheel movement should be the same no matter the zoom level.

* Panning movement should be the same no matter the zoom level.

* Fix elements pasting.

* Fix text WYSIWGT.

* Fix scrollbars and visibility.
This commit is contained in:
Enzo Ferey 2020-02-15 21:03:32 +01:00 • committed by GitHub
parent dd2d7e1a88
commit c7ff4c2ed6
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GPG key ID: 4AEE18F83AFDEB23
19 changed files with 612 additions and 272 deletions
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7
src/scene/comparisons.ts
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@ -1,6 +1,6 @@
import { ExcalidrawElement } from "../element/types";
import { hitTest } from "../element/collision";
import { getElementAbsoluteCoords } from "../element";
import { getElementAbsoluteCoords, hitTest } from "../element";
export const hasBackground = (type: string) =>
type === "rectangle" || type === "ellipse" || type === "diamond";
@ -18,11 +18,12 @@ export function getElementAtPosition(
elements: readonly ExcalidrawElement[],
x: number,
y: number,
zoom: number,
) {
let hitElement = null;
// We need to to hit testing from front (end of the array) to back (beginning of the array)
for (let i = elements.length - 1; i >= 0; --i) {
if (hitTest(elements[i], x, y)) {
if (hitTest(elements[i], x, y, zoom)) {
hitElement = elements[i];
break;
}