/* Flot plugin for adding panning and zooming capabilities to a plot.
The default behaviour is double click and scrollwheel up/down to zoom in, drag to pan. The plugin defines plot.zoom({ center }), plot.zoomOut() and plot.pan(offset) so you easily can add custom controls. It also fires a “plotpan” and “plotzoom” event when something happens, useful for synchronizing plots.
Example usage:
plot = $.plot(...); // zoom default amount in on the pixel (100, 200) plot.zoom({ center: { left: 10, top: 20 } }); // zoom out again plot.zoomOut({ center: { left: 10, top: 20 } }); // pan 100 pixels to the left and 20 down plot.pan({ left: -100, top: 20 })
Options:
zoom: { interactive: false trigger: "dblclick" // or "click" for single click amount: 1.5 // 2 = 200% (zoom in), 0.5 = 50% (zoom out) } pan: { interactive: false } xaxis, yaxis, x2axis, y2axis: { zoomRange: null // or [number, number] (min range, max range) panRange: null // or [number, number] (min, max) }
“interactive” enables the built-in drag/click behaviour. “amount” is the amount to zoom the viewport relative to the current range, so 1 is 100% (i.e. no change), 1.5 is 150% (zoom in), 0.7 is 70% (zoom out).
“zoomRange” is the interval in which zooming can happen, e.g. with zoomRange: [1, 100] the zoom will never scale the axis so that the difference between min and max is smaller than 1 or larger than 100. You can set either of them to null to ignore.
“panRange” confines the panning to stay within a range, e.g. with panRange: [-10, 20] panning stops at -10 in one end and at 20 in the other. Either can be null. */
// First two dependencies, jquery.event.drag.js and // jquery.mousewheel.js, we put them inline here to save people the // effort of downloading them.
/* jquery.event.drag.js ~ v1.5 ~ Copyright © 2008, Three Dub Media (threedubmedia.com)
Licensed under the MIT License ~ threedubmedia.googlecode.com/files/MIT-LICENSE.txt */ (function(E){E.fn.drag=function(L,K,J){if(K){this.bind(“dragstart”,L)}if(J){this.bind(“dragend”,J)}return !L?this.trigger(“drag”):this.bind(“drag”,K?K:L)};var A=E.event,B=A.special,F=B.drag={not:“:input”,distance:0,which:1,dragging:false,setup:function(J){J=E.extend({distance:F.distance,which:F.which,not:F.not},J||{});J.distance=I(J.distance);A.add(this,“mousedown”,H,J);if(this.attachEvent){this.attachEvent(“ondragstart”,D)}},teardown:function(){A.remove(this,“mousedown”,H);if(this===F.dragging){F.dragging=F.proxy=false}G(this,true);if(this.detachEvent){this.detachEvent(“ondragstart”,D)}}};B.dragstart=B.dragend={setup:function(){},teardown:function(){}};function H(L){var K=this,J,M=L.data||{};if(M.elem){K=L.dragTarget=M.elem;L.dragProxy=F.proxy||K;L.cursorOffsetX=M.pageX-M.left;L.cursorOffsetY=M.pageY-M.top;L.offsetX=L.pageX-L.cursorOffsetX;L.offsetY=L.pageY-L.cursorOffsetY}else{if(F.dragging||(M.which>0&&L.which!=M.which)||E(L.target).is(M.not)){return }}switch(L.type){case“mousedown”:E.extend(M,E(K).offset(),{elem:K,target:L.target,pageX:L.pageX,pageY:L.pageY});A.add(document,“mousemove mouseup”,H,M);G(K,false);F.dragging=null;return false;case !F.dragging&&“mousemove”:if(I(L.pageX-M.pageX)+I(L.pageY-M.pageY)<M.distance){break}L.target=M.target;J=C(L,“dragstart”,K);if(J!==false){F.dragging=K;F.proxy=L.dragProxy=E(J||K)}case“mousemove”:if(F.dragging){J=C(L,“drag”,K);if(B.drop){B.drop.allowed=(J!==false);B.drop.handler(L)}if(J!==false){break}L.type=“mouseup”}case“mouseup”:A.remove(document,“mousemove mouseup”,H);if(F.dragging){if(B.drop){B.drop.handler(L)}C(L,“dragend”,K)}G(K,true);F.dragging=F.proxy=M.elem=false;break}return true}function C(M,K,L){M.type=K;var J=E.event.handle.call(L,M);return J===false?false:J||M.result}function I(J){return Math.pow(J,2)}function D(){return(F.dragging===false)}function G(K,J){if(!K){return }K.unselectable=J?“off”:“on”;K.onselectstart=function(){return J};if(K.style){K.style.MozUserSelect=J?“”:“none”}}})(jQuery);
/* jquery.mousewheel.min.js
* Copyright (c) 2009 Brandon Aaron (http://brandonaaron.net) * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers. * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix. * * Version: 3.0.2 * * Requires: 1.2.2+ */
(function©{var a=;c.event.special.mousewheel={setup:function(){if(this.addEventListener){for(var d=a.length;d;){this.addEventListener(a,b,false)}}else{this.onmousewheel=b}},teardown:function(){if(this.removeEventListener){for(var d=a.length;d;){this.removeEventListener(a,b,false)}}else{this.onmousewheel=null}}};c.fn.extend({mousewheel:function(d){return d?this.bind(“mousewheel”,d):this.trigger(“mousewheel”)},unmousewheel:function(d){return this.unbind(“mousewheel”,d)}});function b(f){var d=[].slice.call(arguments,1),g=0,e=true;f=c.event.fix(f||window.event);f.type=“mousewheel”;if(f.wheelDelta){g=f.wheelDelta/120}if(f.detail){g=-f.detail/3}d.unshift(f,g);return c.event.handle.apply(this,d)}})(jQuery);
(function ($) {
var options = { xaxis: { zoomRange: null, // or [number, number] (min range, max range) panRange: null // or [number, number] (min, max) }, zoom: { interactive: false, trigger: "dblclick", // or "click" for single click amount: 1.5 // how much to zoom relative to current position, 2 = 200% (zoom in), 0.5 = 50% (zoom out) }, pan: { interactive: false } }; function init(plot) { function bindEvents(plot, eventHolder) { var o = plot.getOptions(); if (o.zoom.interactive) { function clickHandler(e, zoomOut) { var c = plot.offset(); c.left = e.pageX - c.left; c.top = e.pageY - c.top; if (zoomOut) plot.zoomOut({ center: c }); else plot.zoom({ center: c }); } eventHolder[o.zoom.trigger](clickHandler); eventHolder.mousewheel(function (e, delta) { clickHandler(e, delta < 0); return false; }); } if (o.pan.interactive) { var prevCursor = 'default', pageX = 0, pageY = 0; eventHolder.bind("dragstart", { distance: 10 }, function (e) { if (e.which != 1) // only accept left-click return false; eventHolderCursor = eventHolder.css('cursor'); eventHolder.css('cursor', 'move'); pageX = e.pageX; pageY = e.pageY; }); eventHolder.bind("drag", function (e) { // unused at the moment, but we need it here to // trigger the dragstart/dragend events }); eventHolder.bind("dragend", function (e) { eventHolder.css('cursor', prevCursor); plot.pan({ left: pageX - e.pageX, top: pageY - e.pageY }); }); } } plot.zoomOut = function (args) { if (!args) args = {}; if (!args.amount) args.amount = plot.getOptions().zoom.amount args.amount = 1 / args.amount; plot.zoom(args); } plot.zoom = function (args) { if (!args) args = {}; var axes = plot.getAxes(), options = plot.getOptions(), c = args.center, amount = args.amount ? args.amount : options.zoom.amount, w = plot.width(), h = plot.height(); if (!c) c = { left: w / 2, top: h / 2 }; var xf = c.left / w, x1 = c.left - xf * w / amount, x2 = c.left + (1 - xf) * w / amount, yf = c.top / h, y1 = c.top - yf * h / amount, y2 = c.top + (1 - yf) * h / amount; function scaleAxis(min, max, name) { var axis = axes[name], axisOptions = options[name]; if (!axis.used) return; min = axis.c2p(min); max = axis.c2p(max); if (max < min) { // make sure min < max var tmp = min min = max; max = tmp; } var range = max - min, zr = axisOptions.zoomRange; if (zr && ((zr[0] != null && range < zr[0]) || (zr[1] != null && range > zr[1]))) return; axisOptions.min = min; axisOptions.max = max; } scaleAxis(x1, x2, 'xaxis'); scaleAxis(x1, x2, 'x2axis'); scaleAxis(y1, y2, 'yaxis'); scaleAxis(y1, y2, 'y2axis'); plot.setupGrid(); plot.draw(); if (!args.preventEvent) plot.getPlaceholder().trigger("plotzoom", [ plot ]); } plot.pan = function (args) { var l = +args.left, t = +args.top, axes = plot.getAxes(), options = plot.getOptions(); if (isNaN(l)) l = 0; if (isNaN(t)) t = 0; function panAxis(delta, name) { var axis = axes[name], axisOptions = options[name], min, max; if (!axis.used) return; min = axis.c2p(axis.p2c(axis.min) + delta), max = axis.c2p(axis.p2c(axis.max) + delta); var pr = axisOptions.panRange; if (pr) { // check whether we hit the wall if (pr[0] != null && pr[0] > min) { delta = pr[0] - min; min += delta; max += delta; } if (pr[1] != null && pr[1] < max) { delta = pr[1] - max; min += delta; max += delta; } } axisOptions.min = min; axisOptions.max = max; } panAxis(l, 'xaxis'); panAxis(l, 'x2axis'); panAxis(t, 'yaxis'); panAxis(t, 'y2axis'); plot.setupGrid(); plot.draw(); if (!args.preventEvent) plot.getPlaceholder().trigger("plotpan", [ plot ]); } plot.hooks.bindEvents.push(bindEvents); } $.plot.plugins.push({ init: init, options: options, name: 'navigate', version: '1.1' });
})(jQuery);