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public/js/flot.js  view on Meta::CPAN

        plotOffset = { left: 0, right: 0, top: 0, bottom: 0},
        plotWidth = 0, plotHeight = 0,
        hooks = {
            processOptions: [],
            processRawData: [],
            processDatapoints: [],
            processOffset: [],
            drawBackground: [],
            drawSeries: [],
            draw: [],
            bindEvents: [],
            drawOverlay: [],
            shutdown: []
        },
        plot = this;

        // public functions
        plot.setData = setData;
        plot.setupGrid = setupGrid;
        plot.draw = draw;
        plot.getPlaceholder = function() { return placeholder; };

public/js/flot.js  view on Meta::CPAN

        // public attributes
        plot.hooks = hooks;

        // initialize
        initPlugins(plot);
        parseOptions(options_);
        setupCanvases();
        setData(data_);
        setupGrid();
        draw();
        bindEvents();


        function executeHooks(hook, args) {
            args = [plot].concat(args);
            for (var i = 0; i < hook.length; ++i)
                hook[i].apply(this, args);
        }

        function initPlugins() {

public/js/flot.js  view on Meta::CPAN

            if (placeholder.css("position") == 'static')
                placeholder.css("position", "relative"); // for positioning labels and overlay

            surface = new Canvas("flot-base", placeholder);
            overlay = new Canvas("flot-overlay", placeholder); // overlay canvas for interactive features

            ctx = surface.context;
            octx = overlay.context;

            // define which element we're listening for events on
            eventHolder = $(overlay.element).unbind();

            // If we're re-using a plot object, shut down the old one

            var existing = placeholder.data("plot");

            if (existing) {
                existing.shutdown();
                overlay.clear();
            }

            // save in case we get replotted
            placeholder.data("plot", plot);
        }

        function bindEvents() {
            // bind events
            if (options.grid.hoverable) {
                eventHolder.mousemove(onMouseMove);

                // Use bind, rather than .mouseleave, because we officially
                // still support jQuery 1.2.6, which doesn't define a shortcut
                // for mouseenter or mouseleave.  This was a bug/oversight that
                // was fixed somewhere around 1.3.x.  We can return to using
                // .mouseleave when we drop support for 1.2.6.

                eventHolder.bind("mouseleave", onMouseLeave);
            }

            if (options.grid.clickable)
                eventHolder.click(onClick);

            executeHooks(hooks.bindEvents, [eventHolder]);
        }

        function shutdown() {
            if (redrawTimeout)
                clearTimeout(redrawTimeout);

            eventHolder.unbind("mousemove", onMouseMove);
            eventHolder.unbind("mouseleave", onMouseLeave);
            eventHolder.unbind("click", onClick);

            executeHooks(hooks.shutdown, [eventHolder]);
        }

        function setTransformationHelpers(axis) {
            // set helper functions on the axis, assumes plot area
            // has been computed already

            function identity(x) { return x; }