@aurigma/design-atoms/Input/InputHandler/Default/PanHandler.js

Design Atoms is a part of Customer's Canvas SDK which allows for manipulating individual design elements through your code.

import { InputState } from "./../../../Input/InputManager/IInputManager";
import { PointF } from "@aurigma/design-atoms-model/Math";
import { ViewerCommand } from "@aurigma/design-atoms-interfaces";
export class PanHandler {
    constructor(_commandManager) {
        this._commandManager = _commandManager;
    }
    async process(params) {
        const startPoint = params.state === InputState.Started ?
            params.startPage.clone() :
            this._lastPoint;
        const args = {
            delta: new PointF(startPoint.x - params.page.x, startPoint.y - params.page.y)
        };
        await this._commandManager.execute(ViewerCommand.moveViewPort, args);
        this._lastPoint = params.state === InputState.Finished ? null : params.page.clone();
    }
}
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