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rework zoom to zoom into mouse location

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Signed-off-by: Victor Seiji Hariki <victorseijih@gmail.com>
This commit is contained in:
Victor Seiji Hariki 2022-12-27 18:38:36 -03:00
parent 44e760f37d
commit 7e6df6819f
1 changed files with 16 additions and 5 deletions
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21
js/initalize/layers.populate.js
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@ -285,19 +285,30 @@ mouse.registerContext(
mouse.listen.camera.onwheel.on((evn) => {
evn.evn.preventDefault();
// Get cursor world position
const cursorPosition = viewport.viewToCanvas(evn.x, evn.y);
console.debug(cursorPosition);
// Get viewport center
const pcx = viewport.cx;
const pcy = viewport.cy;
if (evn.delta < 0) {
viewport.zoom *= 1 + Math.abs(evn.delta * 0.0002);
} else {
viewport.zoom *= 1 - Math.abs(evn.delta * 0.0002);
}
// Apply zoom
viewport.zoom *= 1 - evn.delta * 0.0002;
// Apply normal zoom (center of viewport)
viewport.cx = pcx;
viewport.cy = pcy;
viewport.transform(imageCollection.element);
// Calculate new viewport center and move
const newCursorPosition = viewport.viewToCanvas(evn.x, evn.y);
viewport.cx = pcx - (newCursorPosition.x - cursorPosition.x);
viewport.cy = pcy - (newCursorPosition.y - cursorPosition.y);
viewport.transform(imageCollection.element);
toolbar.currentTool.redraw();
});