iD/js/id/ui/intro/area.js

iD.ui.intro.area = function(context, reveal) {

    var event = d3.dispatch('done'),
        timeout;

    var step = {
        name: 'Areas'
    };

    step.enter = function() {

        var playground = [-85.63552, 41.94159],
            corner = [-85.63565411045074, 41.9417715536927];
        context.map().centerZoom(playground, 19);
        reveal('button.add-area', 'intro.areas.add');

        context.on('enter.intro', addArea);

        function addArea(mode) {
            if (mode.id !== 'add-area') return;
            context.on('enter.intro', drawArea);

            var padding = 120 * Math.pow(2, context.map().zoom() - 19);
            var pointBox = iD.ui.intro.pad(context.projection(corner), padding);
            reveal(pointBox, 'intro.areas.corner');

            context.map().on('move.intro', function() {
                padding = 120 * Math.pow(2, context.map().zoom() - 19);
                pointBox = iD.ui.intro.pad(context.projection(corner), padding);
                reveal(pointBox, 'intro.areas.corner', 0);
            });
        }

        function drawArea(mode) {
            if (mode.id !== 'draw-area') return;
            context.on('enter.intro', enterSelect);

            var padding = 150 * Math.pow(2, context.map().zoom() - 19);
            var pointBox = iD.ui.intro.pad(context.projection(playground), padding);
            reveal(pointBox, 'intro.areas.place');

            context.map().on('move.intro', function() {
                padding = 150 * Math.pow(2, context.map().zoom() - 19);
                pointBox = iD.ui.intro.pad(context.projection(playground), padding);
                reveal(pointBox, 'intro.areas.place', 0);
            });
        }

        function enterSelect(mode) {
            if (mode.id !== 'select') return;
            context.map().on('move.intro', null);
            context.on('enter.intro', null);

            timeout = setTimeout(function() {
                reveal('.preset-grid-search-wrap input', 'intro.areas.search');
                d3.select('.preset-grid-search-wrap input').on('keyup.intro', keySearch);
            }, 500);
        }
        
        function keySearch() {
            var first = d3.select('.grid-button-wrap:first-child');
            if (first.datum().id === 'leisure/playground') {
                reveal(first.select('.grid-entry').node(), 'intro.areas.choose');
                d3.selection.prototype.one.call(context.history(), 'change.intro', selectedPreset);
                d3.select('.preset-grid-search-wrap input').on('keyup.intro', null);
            }
        }

        function selectedPreset() {
            reveal('.pane', 'intro.areas.describe');
            context.on('exit.intro', event.done);
        }


    };

    step.exit = function() {
        window.clearTimeout(timeout);
        context.on('enter.intro', null);
        context.on('exit.intro', null);
        context.history().on('change.intro', null);
        context.map().on('move.intro', null);
        d3.select('.preset-grid-search-wrap input').on('keyup.intro', null);
    };

    return d3.rebind(step, event, 'on');
};