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Diffstat (limited to 'jquery.flot.navigate.js')
| -rw-r--r-- | jquery.flot.navigate.js | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/jquery.flot.navigate.js b/jquery.flot.navigate.js new file mode 100644 index 0000000..e6f8834 --- /dev/null +++ b/jquery.flot.navigate.js @@ -0,0 +1,272 @@ +/* +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 (c) 2008, Three Dub Media (http://threedubmedia.com) +Licensed under the MIT License ~ http://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)[0]}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(c){var a=["DOMMouseScroll","mousewheel"];c.event.special.mousewheel={setup:function(){if(this.addEventListener){for(var d=a.length;d;){this.addEventListener(a[--d],b,false)}}else{this.onmousewheel=b}},teardown:function(){if(this.removeEventListener){for(var d=a.length;d;){this.removeEventListener(a[--d],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); |