Plot coordinates on PDF displayed in iFrame

Question

Firstly I appreciate my request is quite \"ambitious\", but any help is greatly appreciated as I\'m not sure the best way to proceed.

On my site (built with PHP/MySQ

Answer 1

You could use PDF.js to render the PDF on the page. PDF.js will display it as part of the page so you can attach events and interact with it in ways you could not if it was being displayed by the Acrobat plugin.

I couldn't find a preexisting library for getting the coordinates so I whipped up this code to implement it.

Live demo of selection code

$(function () {
    "use strict";
    var startX,
        startY,
        selectedBoxes = [],
        $selectionMarquee = $('#selectionMarquee'),
        positionBox = function ($box, coordinates) {
            $box.css(
                'top', coordinates.top
            ).css(
                'left', coordinates.left
            ).css(
                'height', coordinates.bottom - coordinates.top
            ).css(
                'width', coordinates.right - coordinates.left
            );
        },
        compareNumbers = function (a, b) {
            return a - b;
        },
        getBoxCoordinates = function (startX, startY, endX, endY) {
            var x = [startX, endX].sort(compareNumbers),
                y = [startY, endY].sort(compareNumbers);

            return {
                top: y[0],
                left: x[0],
                right: x[1],
                bottom: y[1]
            };
        },
        trackMouse = function (event) {
            var position = getBoxCoordinates(startX, startY,
                event.pageX, event.pageY);
            positionBox($selectionMarquee, position);
        };


    $(document).on('mousedown', function (event) {
        startX = event.pageX;
        startY = event.pageY;
        positionBox($selectionMarquee,
            getBoxCoordinates(startX, startY, startX, startY));
        $selectionMarquee.show();
        $(this).on('mousemove', trackMouse);
    }).on('mouseup', function (event) {
        var position,
            $selectedBox;

            $selectionMarquee.hide();

            position = getBoxCoordinates(startX, startY,
                event.pageX, event.pageY);

            if (position.left !== position.right &&
            position.top !== position.bottom) {
                $selectedBox = $('<div class="selected-box"></div>');
                $selectedBox.hide();
                $('body').append($selectedBox);

                positionBox($selectedBox, position);

                $selectedBox.show();

                selectedBoxes.push(position);

                $(this).off('mousemove', trackMouse);
            }
    });
});

You will have to tweak it to get coordinates that are relative to the PDF once you display it, but this should get you on the right track.