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Diffstat (limited to 'ebus/webhdf/static/lib/flot-0.7/jquery.flot.image.js')
| -rw-r--r-- | ebus/webhdf/static/lib/flot-0.7/jquery.flot.image.js | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/ebus/webhdf/static/lib/flot-0.7/jquery.flot.image.js b/ebus/webhdf/static/lib/flot-0.7/jquery.flot.image.js deleted file mode 100644 index 29ccb12..0000000 --- a/ebus/webhdf/static/lib/flot-0.7/jquery.flot.image.js +++ /dev/null @@ -1,238 +0,0 @@ -/* -Flot plugin for plotting images, e.g. useful for putting ticks on a -prerendered complex visualization. - -The data syntax is [[image, x1, y1, x2, y2], ...] where (x1, y1) and -(x2, y2) are where you intend the two opposite corners of the image to -end up in the plot. Image must be a fully loaded Javascript image (you -can make one with new Image()). If the image is not complete, it's -skipped when plotting. - -There are two helpers included for retrieving images. The easiest work -the way that you put in URLs instead of images in the data (like -["myimage.png", 0, 0, 10, 10]), then call $.plot.image.loadData(data, -options, callback) where data and options are the same as you pass in -to $.plot. This loads the images, replaces the URLs in the data with -the corresponding images and calls "callback" when all images are -loaded (or failed loading). In the callback, you can then call $.plot -with the data set. See the included example. - -A more low-level helper, $.plot.image.load(urls, callback) is also -included. Given a list of URLs, it calls callback with an object -mapping from URL to Image object when all images are loaded or have -failed loading. - -Options for the plugin are - - series: { - images: { - show: boolean - anchor: "corner" or "center" - alpha: [0,1] - } - } - -which can be specified for a specific series - - $.plot($("#placeholder"), [{ data: [ ... ], images: { ... } ]) - -Note that because the data format is different from usual data points, -you can't use images with anything else in a specific data series. - -Setting "anchor" to "center" causes the pixels in the image to be -anchored at the corner pixel centers inside of at the pixel corners, -effectively letting half a pixel stick out to each side in the plot. - - -A possible future direction could be support for tiling for large -images (like Google Maps). - -*/ - -(function ($) { - var options = { - series: { - images: { - show: false, - alpha: 1, - anchor: "corner" // or "center" - } - } - }; - - $.plot.image = {}; - - $.plot.image.loadDataImages = function (series, options, callback) { - var urls = [], points = []; - - var defaultShow = options.series.images.show; - - $.each(series, function (i, s) { - if (!(defaultShow || s.images.show)) - return; - - if (s.data) - s = s.data; - - $.each(s, function (i, p) { - if (typeof p[0] == "string") { - urls.push(p[0]); - points.push(p); - } - }); - }); - - $.plot.image.load(urls, function (loadedImages) { - $.each(points, function (i, p) { - var url = p[0]; - if (loadedImages[url]) - p[0] = loadedImages[url]; - }); - - callback(); - }); - } - - $.plot.image.load = function (urls, callback) { - var missing = urls.length, loaded = {}; - if (missing == 0) - callback({}); - - $.each(urls, function (i, url) { - var handler = function () { - --missing; - - loaded[url] = this; - - if (missing == 0) - callback(loaded); - }; - - $('<img />').load(handler).error(handler).attr('src', url); - }); - } - - function drawSeries(plot, ctx, series) { - var plotOffset = plot.getPlotOffset(); - - if (!series.images || !series.images.show) - return; - - var points = series.datapoints.points, - ps = series.datapoints.pointsize; - - for (var i = 0; i < points.length; i += ps) { - var img = points[i], - x1 = points[i + 1], y1 = points[i + 2], - x2 = points[i + 3], y2 = points[i + 4], - xaxis = series.xaxis, yaxis = series.yaxis, - tmp; - - // actually we should check img.complete, but it - // appears to be a somewhat unreliable indicator in - // IE6 (false even after load event) - if (!img || img.width <= 0 || img.height <= 0) - continue; - - if (x1 > x2) { - tmp = x2; - x2 = x1; - x1 = tmp; - } - if (y1 > y2) { - tmp = y2; - y2 = y1; - y1 = tmp; - } - - // if the anchor is at the center of the pixel, expand the - // image by 1/2 pixel in each direction - if (series.images.anchor == "center") { - tmp = 0.5 * (x2-x1) / (img.width - 1); - x1 -= tmp; - x2 += tmp; - tmp = 0.5 * (y2-y1) / (img.height - 1); - y1 -= tmp; - y2 += tmp; - } - - // clip - if (x1 == x2 || y1 == y2 || - x1 >= xaxis.max || x2 <= xaxis.min || - y1 >= yaxis.max || y2 <= yaxis.min) - continue; - - var sx1 = 0, sy1 = 0, sx2 = img.width, sy2 = img.height; - if (x1 < xaxis.min) { - sx1 += (sx2 - sx1) * (xaxis.min - x1) / (x2 - x1); - x1 = xaxis.min; - } - - if (x2 > xaxis.max) { - sx2 += (sx2 - sx1) * (xaxis.max - x2) / (x2 - x1); - x2 = xaxis.max; - } - - if (y1 < yaxis.min) { - sy2 += (sy1 - sy2) * (yaxis.min - y1) / (y2 - y1); - y1 = yaxis.min; - } - - if (y2 > yaxis.max) { - sy1 += (sy1 - sy2) * (yaxis.max - y2) / (y2 - y1); - y2 = yaxis.max; - } - - x1 = xaxis.p2c(x1); - x2 = xaxis.p2c(x2); - y1 = yaxis.p2c(y1); - y2 = yaxis.p2c(y2); - - // the transformation may have swapped us - if (x1 > x2) { - tmp = x2; - x2 = x1; - x1 = tmp; - } - if (y1 > y2) { - tmp = y2; - y2 = y1; - y1 = tmp; - } - - tmp = ctx.globalAlpha; - ctx.globalAlpha *= series.images.alpha; - ctx.drawImage(img, - sx1, sy1, sx2 - sx1, sy2 - sy1, - x1 + plotOffset.left, y1 + plotOffset.top, - x2 - x1, y2 - y1); - ctx.globalAlpha = tmp; - } - } - - function processRawData(plot, series, data, datapoints) { - if (!series.images.show) - return; - - // format is Image, x1, y1, x2, y2 (opposite corners) - datapoints.format = [ - { required: true }, - { x: true, number: true, required: true }, - { y: true, number: true, required: true }, - { x: true, number: true, required: true }, - { y: true, number: true, required: true } - ]; - } - - function init(plot) { - plot.hooks.processRawData.push(processRawData); - plot.hooks.drawSeries.push(drawSeries); - } - - $.plot.plugins.push({ - init: init, - options: options, - name: 'image', - version: '1.1' - }); -})(jQuery); |