zoom to mouse
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1 changed files with 17 additions and 11 deletions
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@ -81,8 +81,8 @@ export class Resizer {
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// width should be larger
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this.viewbox[2] = height_percentage * el.width;
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} else {
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this.viewbox[3] = width_percentage * el.height;
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// height should be larger
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this.viewbox[3] = width_percentage * el.height;
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}
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this.viewbox[0] -= (this.viewbox[2] - or_width) / 2;
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@ -147,23 +147,29 @@ export class Resizer {
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if (this.hoovering) {
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const delta = e.deltaY > 0 ? 0.1 * this.viewbox[2] : -0.1 * this.viewbox[2];
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const dx = delta * this.scaleX;
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this.viewbox[2] += dx;
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this.viewbox[0] -= dx / 2;
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this.viewbox[2] = Math.min(this.viewbox[2], this.orig_viewbox[2]);
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const dy = delta * this.scaleY;
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this.viewbox[3] += dy;
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this.viewbox[1] -= dy / 2;
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this.viewbox[3] = Math.min(this.viewbox[3], this.orig_viewbox[3]);
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this._clip_viewbox();
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const mouse_dx = this.mouse_pos[0] / this.el_box[0];
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const mouse_dy = this.mouse_pos[1] / this.el_box[1];
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this._zoom([dx, dy], [mouse_dx, mouse_dy]);
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}
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}
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_zoom(deltas: number[], center: number[]) {
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this.viewbox[2] += deltas[0];
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this.viewbox[0] -= deltas[0] * center[0];
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this.viewbox[2] = Math.min(this.viewbox[2], this.orig_viewbox[2]);
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this.viewbox[3] += deltas[1];
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this.viewbox[1] -= deltas[1] * center[1];
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this.viewbox[3] = Math.min(this.viewbox[3], this.orig_viewbox[3]);
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this._clip_viewbox();
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}
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get_viewbox(): number[] {
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return this.viewbox;
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// return [this.viewbox[0] / this.orig_viewbox[0], this.viewbox[1] / this.orig_viewbox[1], this.viewbox[2] / this.orig_viewbox[2], this.viewbox[3] / this.orig_viewbox[3],];
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}
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get_mouse_pos(): number[] {
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